/* ============================================
   PAPER READER - 1980s Electric Pixel Style
   ============================================ */

:root {
    /* Neon color palette */
    --neon-cyan: #00ffff;
    --neon-magenta: #ff00ff;
    --neon-pink: #ff1493;
    --neon-blue: #00bfff;
    --neon-green: #39ff14;
    --neon-yellow: #ffd700;
    --neon-orange: #ff6b35;

    /* Base colors */
    --bg-dark: #0a0a12;
    --bg-darker: #050508;
    --bg-card: #12121c;
    --bg-card-hover: #1a1a28;
    --text-primary: #e0e0ff;
    --text-secondary: #8080a0;
    --border-color: #2a2a3a;
    --success: #2ecc71;
    --warning: #f1c40f;
    --error: #ff6b6b;
    --info: #4da6ff;

    /* Grid glow */
    --grid-color: rgba(0, 255, 255, 0.03);

    /* Fonts */
    --font-pixel: 'Press Start 2P', cursive;
    --font-retro: 'VT323', monospace;

    /* Animation variables */
    --click-scale: 0.95;
    --click-duration: 0.1s;
}

/* Custom Scrollbar - Retro Neon Style */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-darker);
    border-left: 1px solid var(--border-color);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #2a2a3a 0%, #1a1a2a 100%);
    border: 1px solid var(--neon-cyan);
    border-radius: 2px;
    box-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #3a3a4a 0%, #2a2a3a 100%);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

::-webkit-scrollbar-corner {
    background: var(--bg-darker);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--neon-cyan) var(--bg-darker);
}

/* Global Button Click Animation */
button,
.btn-view,
.btn-tool,
.nav-tab,
.paper-card {
    transition: transform var(--click-duration) ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

button:active:not(:disabled),
.btn-view:active,
.btn-tool:active,
.nav-tab:active {
    transform: scale(var(--click-scale));
}

/* Ripple effect container */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
}

.ripple.animate::after {
    animation: ripple-effect 0.4s ease-out;
}

@keyframes ripple-effect {
    0% {
        width: 0;
        height: 0;
        opacity: 0.5;
    }

    100% {
        width: 200px;
        height: 200px;
        opacity: 0;
    }
}

/* Button glow pulse on hover */
@keyframes glow-pulse {

    0%,
    100% {
        box-shadow: 0 0 5px var(--neon-cyan);
    }

    50% {
        box-shadow: 0 0 20px var(--neon-cyan), 0 0 30px var(--neon-cyan);
    }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-retro);
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Scanline effect - DISABLED */
.scanlines {
    display: none;
}

/* CRT flicker - DISABLED */
.crt-flicker {
    display: none;
}

/* ============================================
   HEADER
   ============================================ */

.header {
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    border-bottom: 2px solid var(--neon-cyan);
    padding: 1.5rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.1);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 2.5rem;
    color: var(--neon-cyan);
    text-shadow: 0 0 20px var(--neon-cyan);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {

    0%,
    100% {
        text-shadow: 0 0 20px var(--neon-cyan);
    }

    50% {
        text-shadow: 0 0 40px var(--neon-cyan), 0 0 60px var(--neon-cyan);
    }
}

.logo-text h1 {
    font-family: var(--font-pixel);
    font-size: 1.5rem;
    color: var(--neon-cyan);
    text-shadow:
        0 0 10px var(--neon-cyan),
        2px 2px 0 var(--neon-magenta);
    letter-spacing: 2px;
}

.tagline {
    font-family: var(--font-retro);
    font-size: 1.2rem;
    color: var(--text-secondary);
    letter-spacing: 3px;
}

.header-stats {
    display: flex;
    gap: 1.5rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header-action {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.8rem;
    border-radius: 999px;
    border: 1px solid rgba(0, 255, 255, 0.35);
    background: rgba(0, 255, 255, 0.08);
    color: var(--neon-cyan);
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    box-shadow: 0 8px 18px rgba(0, 255, 255, 0.12);
    cursor: pointer;
}

.header-action i {
    font-size: 1rem;
}

.header-action .action-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.header-action .action-label {
    font-size: 0.5rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.header-action .action-value {
    font-size: 0.6rem;
    color: var(--neon-cyan);
}

.header-action:hover {
    background: rgba(0, 255, 255, 0.16);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.25);
}

.header-action.signed-in {
    border-color: rgba(57, 255, 20, 0.6);
    color: var(--neon-green);
    background: rgba(57, 255, 20, 0.12);
}

.header-action.signed-in .action-value {
    color: var(--neon-green);
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 100px;
    clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.stat-label {
    font-size: 0.65rem;
    font-family: var(--font-pixel);
    color: var(--text-secondary);
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--neon-yellow);
    font-family: var(--font-pixel);
    line-height: 1;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.stat-value.online {
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green);
}

/* Presence List */
.presence-list {
    display: flex;
    align-items: center;
    gap: -0.5rem;
    /* Overlapping effect like Overleaf */
    margin-right: 1rem;
    padding-right: 0.5rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid var(--neon-cyan);
    position: relative;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    margin-left: -10px;
    /* Overlap */
}

.user-avatar:first-child {
    margin-left: 0;
}

.user-avatar:hover {
    transform: scale(1.2) translateY(-2px);
    box-shadow: 0 0 20px var(--neon-cyan);
    z-index: 110;
    margin-right: 5px;
    margin-left: -5px;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-avatar .user-tooltip {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-darker);
    border: 1px solid var(--neon-cyan);
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    font-family: var(--font-retro);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s;
    color: var(--neon-cyan);
    z-index: 100;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}

.user-avatar:hover .user-tooltip {
    opacity: 1;
    bottom: -45px;
}

/* ============================================
   TOOLBAR
   ============================================ */

.toolbar {
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 90px;
    z-index: 99;
}

.toolbar-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    flex: 1;
    max-width: 500px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.search-box:focus-within {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
}

.search-box i {
    color: var(--text-secondary);
    font-size: 1.2rem;
    margin-right: 0.75rem;
}

.search-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-retro);
    font-size: 1.2rem;
    flex: 1;
    outline: none;
    letter-spacing: 1px;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.btn-clear {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    opacity: 0;
    transition: opacity 0.3s, color 0.3s;
}

.search-box:focus-within .btn-clear,
.btn-clear.visible {
    opacity: 1;
}

.btn-clear:hover {
    color: var(--neon-pink);
}

.toolbar-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.sort-control {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sort-control label {
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    color: var(--text-secondary);
}

.sort-control select {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--neon-cyan);
    font-family: var(--font-retro);
    font-size: 1rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.3s;
}

.sort-control select:hover,
.sort-control select:focus {
    border-color: var(--neon-cyan);
}

.btn-sort-order,
.btn-view,
.btn-refresh {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.2rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-sort-order:hover,
.btn-view:hover,
.btn-refresh:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.btn-view.active {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    border-color: var(--neon-cyan);
}

.view-control {
    display: flex;
}

.view-control .btn-view:first-child {
    border-right: none;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
    min-height: calc(100vh - 300px);
}

.papers-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.papers-container.list-view {
    grid-template-columns: 1fr;
}

/* Paper Card */
.paper-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.paper-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta), var(--neon-cyan));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.paper-card:hover {
    border-color: var(--neon-cyan);
    transform: translateY(-5px);
    box-shadow:
        0 10px 40px rgba(0, 255, 255, 0.2),
        inset 0 0 30px rgba(0, 255, 255, 0.05);
}

.paper-card:hover::before {
    transform: scaleX(1);
}

.paper-thumbnail {
    width: 100%;
    height: 350px;
    background: var(--bg-darker);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.paper-thumbnail img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
}

.paper-card:hover .paper-thumbnail img {
    transform: scale(1.05);
}

.paper-thumbnail .loading-thumb {
    color: var(--text-secondary);
    font-size: 3rem;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.3;
    }

    50% {
        opacity: 1;
    }
}

.paper-year-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--neon-magenta);
    color: white;
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    padding: 0.3rem 0.5rem;
    box-shadow: 0 0 15px var(--neon-magenta);
}

.paper-info {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.paper-title {
    font-family: var(--font-retro);
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.paper-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.paper-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.paper-meta i {
    font-size: 0.9rem;
}

/* List view styles */
.papers-container.list-view .paper-card {
    display: flex;
    flex-direction: row;
}

.papers-container.list-view .paper-thumbnail {
    width: 150px;
    height: 200px;
    flex-shrink: 0;
}

.papers-container.list-view .paper-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-top: none;
    border-left: 1px solid var(--border-color);
}

.papers-container.list-view .paper-title {
    font-size: 1.3rem;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    margin-bottom: 0.5rem;
}

/* Loading State */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top-color: var(--neon-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading span {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% {
        opacity: 0.5;
    }
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem;
    text-align: center;
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.empty-state h3 {
    font-family: var(--font-pixel);
    font-size: 1rem;
    color: var(--neon-pink);
    margin-bottom: 0.75rem;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

/* ============================================
   MODAL
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    width: 95%;
    height: 95%;
    max-width: 1400px;
    background: var(--bg-dark);
    border: 3px solid var(--neon-cyan);
    box-shadow:
        0 0 50px rgba(0, 255, 255, 0.3),
        inset 0 0 50px rgba(0, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    animation: modal-in 0.3s ease;
}

@keyframes modal-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-darker);
    border-bottom: 2px solid var(--neon-cyan);
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-retro);
    font-size: 1.3rem;
    color: var(--text-primary);
}

.modal-title i {
    color: var(--neon-pink);
    font-size: 1.5rem;
}

.modal-controls {
    display: flex;
    gap: 0.5rem;
}

.btn-modal {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.2rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-modal:hover {
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}

.btn-modal.btn-close:hover {
    border-color: var(--neon-pink);
    color: var(--neon-pink);
}

.btn-modal.btn-nav {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    border-color: var(--neon-cyan);
}

.btn-modal.btn-nav:hover {
    background: var(--neon-magenta);
    border-color: var(--neon-magenta);
    color: white;
    box-shadow: 0 0 15px var(--neon-magenta);
}

.nav-divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 0.25rem;
}

.modal-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.pdf-info-panel {
    width: 200px;
    background: var(--bg-darker);
    border-right: 1px solid var(--border-color);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-label {
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.info-value {
    font-size: 1.3rem;
    color: var(--neon-yellow);
}

.pdf-viewer-container {
    flex: 1;
    background: #1a1a1a;
}

.pdf-viewer-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--bg-darker);
    border-top: 2px solid var(--neon-magenta);
    padding: 1rem 2rem;
    margin-top: auto;
}

.footer-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.copyright i {
    color: var(--neon-green);
}

.footer-text {
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    color: var(--text-secondary);
    animation: blink 2s step-end infinite;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .logo-text h1 {
        font-size: 1rem;
    }

    .toolbar-content {
        flex-direction: column;
    }

    .search-box {
        max-width: 100%;
        width: 100%;
    }

    .papers-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .paper-thumbnail {
        height: 280px;
    }

    .modal-content {
        width: 100%;
        height: 100%;
    }

    .pdf-info-panel {
        display: none;
    }

    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    /* Editor Mobile Support */
    .editor-container {
        flex-direction: column;
    }

    .editor-sidebar {
        width: 100%;
        max-height: 150px;
        border-right: none;
        border-bottom: 1px solid #333;
    }

    .file-list {
        display: flex;
        flex-wrap: wrap;
        gap: 5px;
        padding: 10px;
    }

    .file-item {
        padding: 6px 12px;
        background: #2f3439;
        border-radius: 4px;
        border-left: none !important;
        font-size: 0.8rem;
    }

    .editor-content-area {
        flex-direction: column;
    }

    .source-view {
        flex: 1;
        min-height: 200px;
        border-right: none;
        border-bottom: 1px solid #333;
    }

    .preview-view {
        flex: 1;
        min-height: 0;
    }

    .editor-content-area.show-preview .source-view {
        display: none;
    }

    .editor-content-area.show-source .preview-view {
        display: none;
    }

    .editor-content-area.show-source .panel-resizer {
        display: none;
    }

    .editor-content-area.show-preview .panel-resizer {
        display: none;
    }

    .code-editor {
        font-size: 12px;
        padding: 10px;
    }

    .editor-toolbar {
        flex-wrap: nowrap;
        height: auto;
        padding: 5px 10px;
        gap: 5px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .editor-toolbar::-webkit-scrollbar {
        display: none;
    }

    .mobile-editor-tabs {
        display: flex;
    }

    .toolbar-left,
    .toolbar-right {
        gap: 5px;
        flex-shrink: 0;
    }

    .current-file {
        font-size: 0.75rem;
        max-width: 150px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .btn-tool {
        padding: 4px 8px;
        font-size: 0.75rem;
    }

    .preview-toolbar {
        flex-wrap: wrap;
        height: auto;
        padding: 8px;
        gap: 8px;
    }

    .btn-recompile {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .btn-compile-download {
        padding: 4px 8px;
        font-size: 0.75rem;
    }

    #pdf-viewer-container {
        padding: 10px;
    }

    .nav-tabs {
        margin-right: 0;
        gap: 8px;
    }

    .nav-tab {
        padding: 4px 10px;
        font-size: 0.6rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 1rem;
    }

    .toolbar {
        padding: 0.75rem 1rem;
    }

    .main-content {
        padding: 1rem;
    }

    .papers-container {
        grid-template-columns: 1fr;
    }

    .sort-control label {
        display: none;
    }
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-card);
    border: 2px solid var(--neon-cyan);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-retro);
    font-size: 1.1rem;
    z-index: 10000;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ============================================
   HELP MODAL
   ============================================ */

.help-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.help-modal.active {
    opacity: 1;
}

.help-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
}

.help-content {
    position: relative;
    background: var(--bg-dark);
    border: 3px solid var(--neon-magenta);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 0 50px rgba(255, 0, 255, 0.3);
}

.help-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-darker);
    border-bottom: 2px solid var(--neon-magenta);
}

.help-header h2 {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    color: var(--neon-magenta);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.help-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.3s;
}

.help-close:hover {
    color: var(--neon-pink);
}

.help-body {
    padding: 1.5rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.shortcut-group h3 {
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    color: var(--neon-cyan);
    margin-bottom: 0.75rem;
    letter-spacing: 1px;
}

.shortcut {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.4rem 0;
    font-size: 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.shortcut:last-child {
    border-bottom: none;
}

.shortcut kbd {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.2rem 0.5rem;
    font-family: var(--font-retro);
    font-size: 0.9rem;
    color: var(--neon-yellow);
    min-width: 28px;
    text-align: center;
}

.mobile-hint {
    grid-column: 1 / -1;
}

/* ============================================
   PULL TO REFRESH
   ============================================ */

.pull-to-refresh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    background: var(--bg-darker);
    border-bottom: 2px solid var(--neon-green);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-retro);
    font-size: 1rem;
    color: var(--neon-green);
    z-index: 1001;
    transform: translateY(-100%);
    transition: transform 0.3s;
    opacity: 0;
}

.pull-to-refresh.active {
    opacity: 1;
}

.pull-to-refresh i {
    animation: bounce 0.5s infinite alternate;
}

@keyframes bounce {
    from {
        transform: translateY(-3px);
    }

    to {
        transform: translateY(3px);
    }
}

/* ============================================
   MOBILE ENHANCEMENTS
   ============================================ */

/* Larger touch targets */
@media (pointer: coarse) {
    .paper-card {
        min-height: 120px;
    }

    .btn-modal,
    .btn-sort-order,
    .btn-view,
    .btn-refresh {
        padding: 0.75rem 1rem;
        font-size: 1.3rem;
    }

    .sort-control select {
        padding: 0.75rem 1.25rem;
        font-size: 1.1rem;
    }

    .search-box {
        padding: 0.75rem 1rem;
    }

    .search-box input {
        font-size: 1.1rem;
    }
}

/* Fullscreen mode for mobile */
.modal.fullscreen-mode .modal-content {
    width: 100%;
    height: 100%;
    max-width: none;
    border: none;
}

.modal.fullscreen-mode .modal-header {
    padding: 0.5rem 1rem;
}

.modal.fullscreen-mode .pdf-info-panel {
    display: none;
}

/* Navigation buttons for modal (mobile) */
.modal-nav {
    display: none;
}

@media (max-width: 768px) {
    .modal-nav {
        display: flex;
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-darker);
        border-top: 1px solid var(--border-color);
        padding: 0.5rem;
        justify-content: center;
        gap: 1rem;
    }

    .modal-nav button {
        background: var(--bg-card);
        border: 2px solid var(--border-color);
        color: var(--text-secondary);
        padding: 0.75rem 1.5rem;
        font-size: 1.2rem;
        cursor: pointer;
        flex: 1;
        max-width: 150px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
    }

    .modal-nav button:active {
        border-color: var(--neon-cyan);
        color: var(--neon-cyan);
    }
}

/* Safe area insets for notched devices */
@supports (padding-top: env(safe-area-inset-top)) {
    .header {
        padding-top: calc(1.5rem + env(safe-area-inset-top));
    }

    .footer {
        padding-bottom: calc(1rem + env(safe-area-inset-bottom));
    }

    .modal-content {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* ============================================
   OVERLEAF EDITOR STYLES
   ============================================ */

.nav-tabs {
    display: flex;
    gap: 15px;
    margin-right: 20px;
}

.nav-tab {
    background: transparent;
    border: 2px solid var(--neon-cyan);
    border-radius: 20px;
    color: var(--neon-cyan);
    padding: 6px 16px;
    font-family: var(--font-pixel);
    font-size: 0.6rem;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0.7;
    position: relative;
    overflow: hidden;
}

.nav-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.nav-tab:hover::before {
    left: 100%;
}

.nav-tab:hover,
.nav-tab.active {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 15px var(--neon-cyan), 0 0 30px rgba(0, 255, 255, 0.3);
    opacity: 1;
    text-shadow: none;
}

.nav-tab.active {
    animation: glow-pulse 2s ease-in-out infinite;
}

/* Mobile Editor Tabs */
.mobile-editor-tabs {
    display: none;
    gap: 5px;
    margin-left: 10px;
    background: #1a1a1a;
    padding: 2px;
    border-radius: 4px;
    border: 1px solid #333;
}

.btn-mobile-tab {
    background: transparent;
    border: none;
    color: #888;
    padding: 4px 10px;
    font-size: 0.7rem;
    font-family: var(--font-pixel);
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
}

.btn-mobile-tab.active {
    background: var(--neon-cyan);
    color: #000;
}

/* Editor Layout - Overleaf Style */
#editor-view {
    height: calc(100vh - 100px);
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at top, rgba(0, 255, 255, 0.08), transparent 40%), #141721;
}

.editor-container {
    display: flex;
    height: 100%;
    border: none;
    background: transparent;
}

.editor-sidebar {
    width: 240px;
    border-right: 1px solid #333;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, #1b1f29 0%, #131722 100%);
    transition: width 0.3s ease, min-width 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
    box-shadow: inset -1px 0 0 rgba(0, 255, 255, 0.08);
}

.sidebar-tabs {
    display: flex;
    gap: 6px;
    padding: 8px;
    background: rgba(5, 8, 16, 0.8);
    border-bottom: 1px solid #333;
}

.sidebar-tab {
    flex: 1;
    background: rgba(0, 255, 255, 0.06);
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #b9c6d3;
    font-family: var(--font-retro);
    font-size: 0.8rem;
    padding: 8px 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.sidebar-tab:hover {
    color: #fff;
    border-color: var(--neon-cyan);
}

.sidebar-tab.active {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.6), rgba(0, 191, 255, 0.8));
    color: #001219;
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.45);
}

.sidebar-panel {
    display: none;
    flex-direction: column;
    height: 100%;
}

.sidebar-panel.active {
    display: flex;
}

.file-actions {
    display: flex;
    gap: 6px;
    padding: 8px 10px;
    border-bottom: 1px solid #333;
    background: rgba(10, 15, 25, 0.8);
    flex-wrap: wrap;
}

.file-search {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-bottom: 1px solid #333;
    background: rgba(10, 15, 25, 0.8);
    color: #9aa2aa;
}

.file-search input {
    flex: 1;
    background: rgba(5, 8, 12, 0.6);
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #dcdcdc;
    font-family: var(--font-retro);
    font-size: 0.9rem;
    outline: none;
    border-radius: 6px;
    padding: 6px 8px;
}

.file-search input::placeholder {
    color: #6c737c;
}

.btn-tool.btn-small {
    padding: 6px 8px;
    font-size: 0.75rem;
    gap: 4px;
    border-radius: 6px;
}

.btn-tool.btn-primary {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.7), rgba(0, 191, 255, 0.85));
    color: #001219;
    border-color: rgba(0, 255, 255, 0.8);
}

.btn-tool.btn-primary:hover {
    background: linear-gradient(135deg, rgba(72, 255, 255, 0.9), rgba(0, 191, 255, 0.9));
    color: #001219;
}

.editor-sidebar.collapsed {
    width: 0;
    min-width: 0;
    opacity: 0;
    border-right: none;
}

.editor-sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 16, 0.6);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 1200;
}

.editor-sidebar-backdrop.visible {
    opacity: 1;
    visibility: visible;
}

.editor-section-title {
    padding: 12px 15px;
    font-size: 0.75rem;
    font-weight: bold;
    color: #aeb5bd;
    border-bottom: 1px solid #333;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: linear-gradient(90deg, rgba(0, 255, 255, 0.12), rgba(44, 48, 53, 0.8));
}

.file-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

.file-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-item .file-meta {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #7c8792;
    font-size: 0.7rem;
}

.file-dirty {
    color: var(--neon-orange);
    font-size: 0.9rem;
}

.outline-list,
.comment-list {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

.outline-item {
    padding: 6px 14px;
    font-size: 0.85rem;
    color: #cfe3f3;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.outline-item:hover {
    background: rgba(0, 255, 255, 0.08);
    color: #fff;
    border-left-color: var(--neon-cyan);
}

.outline-item.level-1 {
    padding-left: 14px;
}

.outline-item.level-2 {
    padding-left: 28px;
}

.outline-item.level-3 {
    padding-left: 42px;
}

.outline-item.level-4 {
    padding-left: 56px;
}

.outline-empty {
    padding: 20px;
    color: #8a939c;
    font-size: 0.85rem;
    text-align: center;
}

.comment-compose {
    padding: 10px;
    border-bottom: 1px solid #333;
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: rgba(10, 15, 25, 0.85);
}

.comment-context {
    font-size: 0.75rem;
    color: #b6c2cf;
    background: rgba(0, 255, 255, 0.08);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 4px;
    padding: 6px 8px;
    min-height: 28px;
}

#comment-input {
    background: rgba(6, 10, 16, 0.85);
    color: #dce6f0;
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 4px;
    padding: 8px;
    font-family: var(--font-retro);
    font-size: 0.9rem;
    resize: vertical;
    min-height: 70px;
}

.comment-item {
    border: 1px solid rgba(0, 255, 255, 0.2);
    background: rgba(8, 12, 20, 0.8);
    border-radius: 6px;
    padding: 10px;
    margin: 0 10px 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.comment-item.resolved {
    opacity: 0.6;
}

.comment-meta {
    font-size: 0.7rem;
    color: #9aa2aa;
    display: flex;
    justify-content: space-between;
}

.comment-text {
    font-size: 0.9rem;
    color: #e6e6e6;
    line-height: 1.4;
    word-break: break-word;
    white-space: pre-wrap;
}

.comment-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.file-item {
    padding: 6px 15px;
    font-size: 0.9rem;
    color: #dcdcdc;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    border-left: 3px solid transparent;
    transition: all 0.1s;
    font-family: var(--font-retro);
    border-radius: 6px;
    margin: 2px 8px;
}

.file-item:hover {
    background: rgba(0, 255, 255, 0.08);
    color: #fff;
}

.file-item.active {
    background: rgba(0, 255, 255, 0.16);
    color: #fff;
    border-left: 3px solid var(--neon-cyan);
    /* Overleaf Green Link */
}

.editor-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.editor-toolbar {
    height: 48px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    background: linear-gradient(90deg, rgba(8, 12, 20, 0.95), rgba(26, 32, 45, 0.95));
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.toolbar-left {
    flex: 1;
    min-width: 0;
}

.current-file {
    font-family: var(--font-retro);
    color: #e6f6ff;
    font-weight: 500;
    font-size: 0.9rem;
    background: rgba(0, 255, 255, 0.1);
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid rgba(0, 255, 255, 0.35);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex-shrink: 1;
}

.editor-stats {
    font-size: 0.7rem;
    font-family: var(--font-retro);
    color: #b9c6d3;
    background: rgba(0, 255, 255, 0.08);
    border: 1px solid rgba(0, 255, 255, 0.2);
    padding: 4px 8px;
    border-radius: 4px;
    white-space: nowrap;
    flex-shrink: 0;
    margin-right: 6px;
}

.editor-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-tool {
    background: rgba(8, 12, 20, 0.4);
    color: #c9d3dd;
    border: 1px solid rgba(0, 255, 255, 0.12);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s ease;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.btn-tool:hover {
    background: rgba(0, 255, 255, 0.12);
    color: #fff;
    border-color: rgba(0, 255, 255, 0.4);
}

.btn-tool:active {
    transform: scale(0.95);
    background: #2a2f35;
}

.btn-tool:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 255, 255, 0.3);
}

.btn-tool:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-tool.active {
    background: rgba(0, 255, 255, 0.15);
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
}

/* Recompile Button - Overleaf Green */
#btn-compile {
    background: #369c68;
    /* Overleaf green */
    color: white;
    font-weight: bold;
    border: 1px solid #2e8b5a;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    padding: 6px 16px;
    border-radius: 20px;
    /* Pill shape */
}

#btn-compile:hover {
    background: #2e8b5a;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.4);
    transform: none;
}

#btn-save {
    color: #4da6ff;
}

.btn-danger {
    color: #ff6b6b;
}

.btn-danger:hover {
    background: rgba(255, 107, 107, 0.1);
}

.editor-content-area {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: #1c1f22;
}

.source-view {
    flex: 1;
    min-width: 200px;
    border-right: none;
    display: flex;
    flex-direction: row;
    background: linear-gradient(180deg, #0f1118 0%, #121622 100%);
    position: relative;
    overflow: hidden;
}

/* Line Numbers */
.line-numbers {
    width: 50px;
    min-width: 50px;
    background: rgba(5, 8, 14, 0.8);
    border-right: 1px solid rgba(0, 255, 255, 0.15);
    padding: 20px 0;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.5;
    color: #6a7a8f;
    text-align: right;
    user-select: none;
    overflow: hidden;
    transition: width 0.2s ease, opacity 0.2s ease;
}

.line-numbers.hidden {
    width: 0;
    min-width: 0;
    padding: 0;
    opacity: 0;
}

.line-numbers span {
    display: block;
    padding-right: 10px;
}

.line-numbers span.active {
    color: var(--neon-cyan);
    background: rgba(0, 255, 255, 0.05);
}

/* Panel Resizer */
.panel-resizer {
    width: 6px;
    background: rgba(0, 255, 255, 0.12);
    cursor: col-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
    z-index: 10;
    flex-shrink: 0;
}

.panel-resizer:hover,
.panel-resizer.dragging {
    background: var(--neon-cyan);
}

.resizer-handle {
    width: 2px;
    height: 40px;
    background: rgba(0, 255, 255, 0.5);
    border-radius: 2px;
    transition: background 0.2s ease, height 0.2s ease;
}

.panel-resizer:hover .resizer-handle,
.panel-resizer.dragging .resizer-handle {
    background: var(--bg-dark);
    height: 60px;
}

.code-editor {
    flex: 1;
    background: transparent;
    color: #dce6f0;
    border: none;
    padding: 20px;
    padding-left: 15px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    outline: none;
    white-space: pre;
    overflow: auto;
    tab-size: 4;
}

.code-editor::-webkit-scrollbar {
    width: 8px;
}

.code-editor::-webkit-scrollbar-track {
    background: #1a1a1a;
}

.code-editor::-webkit-scrollbar-thumb {
    background: #3a3a3a;
    border-radius: 4px;
}

.code-editor::-webkit-scrollbar-thumb:hover {
    background: #4a4a4a;
}

.latex-autocomplete {
    position: absolute;
    top: 0;
    left: 0;
    display: none;
    min-width: 220px;
    max-width: 320px;
    max-height: 240px;
    background: rgba(6, 10, 18, 0.98);
    border: 1px solid rgba(0, 255, 255, 0.35);
    border-radius: 10px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6), 0 0 18px rgba(0, 255, 255, 0.2);
    z-index: 20;
    overflow: hidden;
    backdrop-filter: blur(6px);
}

.latex-autocomplete.visible {
    display: block;
}

.autocomplete-header {
    padding: 8px 12px;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(160, 255, 255, 0.9);
    background: linear-gradient(90deg, rgba(0, 255, 255, 0.18), rgba(0, 0, 0, 0));
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
}

.autocomplete-list {
    max-height: 200px;
    overflow-y: auto;
}

.autocomplete-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 12px;
    font-family: 'VT323', monospace;
    font-size: 1rem;
    color: #e8f6ff;
    cursor: pointer;
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background: rgba(0, 255, 255, 0.14);
    color: #ffffff;
}

.autocomplete-item.disabled {
    opacity: 0.5;
    cursor: default;
}

.autocomplete-item .item-meta {
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(120, 220, 230, 0.8);
    flex-shrink: 0;
}

.preview-view {
    flex: 1;
    min-width: 200px;
    background: #525659;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.preview-toolbar {
    height: 40px;
    background: linear-gradient(90deg, rgba(15, 20, 30, 0.95), rgba(35, 42, 55, 0.95));
    border-bottom: 1px solid rgba(0, 255, 255, 0.18);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    z-index: 10;
}

.btn-recompile {
    background: linear-gradient(135deg, #369c68 0%, #2e8b5a 100%);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 140px;
    height: 36px;
    box-shadow: 0 2px 8px rgba(54, 156, 104, 0.4);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn-recompile::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.4s ease;
}

.btn-recompile:hover::before {
    left: 100%;
}

.btn-recompile:hover {
    background: linear-gradient(135deg, #3daf75 0%, #369c68 100%);
    box-shadow: 0 4px 15px rgba(54, 156, 104, 0.5);
    transform: translateY(-1px);
}

.btn-recompile:active {
    transform: scale(0.97) translateY(0);
    box-shadow: 0 1px 4px rgba(54, 156, 104, 0.3);
}

.btn-compile-download {
    background: linear-gradient(135deg, #2f3338 0%, #3a3f45 100%);
    color: #e6e6e6;
    border: 1px solid #4a4f56;
    padding: 6px 14px;
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    font-size: 0.8rem;
    font-weight: 500;
}

.btn-compile-download:hover:not(:disabled) {
    background: linear-gradient(135deg, #454a52 0%, #525860 100%);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.2);
    transform: translateY(-1px);
}

.btn-compile-download:active:not(:disabled) {
    transform: scale(0.97);
}

.btn-compile-download:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(50%);
}

.page-count {
    color: #dcdcdc;
    font-size: 0.8rem;
}

#pdf-viewer-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 30px;
    background: #525659;
}

.pdf-page {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
}

.compile-status {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: var(--bg-darker);
    border: 1px solid var(--success);
    color: var(--success);
    padding: 10px 20px;
    border-radius: 4px;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.compile-log-panel {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 40px;
    background: rgba(8, 12, 20, 0.95);
    border-top: 1px solid rgba(0, 255, 255, 0.2);
    z-index: 90;
    display: flex;
    flex-direction: column;
}

.compile-log-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: rgba(12, 18, 28, 0.95);
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
}

.compile-log-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: #e6e6e6;
}

.compile-log-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.compile-log-filter {
    background: rgba(6, 10, 16, 0.9);
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #dcdcdc;
    font-family: var(--font-retro);
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
}

.compile-log-meta {
    padding: 6px 12px;
    font-size: 0.75rem;
    color: #9aa2aa;
    background: rgba(10, 15, 25, 0.9);
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
}

.compile-log-content {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.8rem;
    line-height: 1.4;
    color: #dcdcdc;
    white-space: pre-wrap;
}

.compile-log-line.error {
    color: var(--error);
}

.compile-log-line.warning {
    color: var(--warning);
}

.spinner-small {
    width: 16px;
    height: 16px;
    border: 2px solid var(--success);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Preview Actions Layout */
.preview-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Button text visibility control for mobile */
.btn-text {
    display: inline;
}

@media (max-width: 480px) {
    .btn-text {
        display: none;
    }

    .btn-recompile {
        padding: 8px 12px;
    }

    .btn-compile-download {
        padding: 6px 10px;
    }

    .page-count {
        font-size: 0.7rem;
    }
}

/* Loading state animation for compile button */
.btn-recompile.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-recompile.loading i {
    animation: spin 1s linear infinite;
}

/* Success flash animation */
@keyframes success-flash {
    0% {
        background: linear-gradient(135deg, #369c68 0%, #2e8b5a 100%);
    }

    50% {
        background: linear-gradient(135deg, #4cca8a 0%, #3daf75 100%);
    }

    100% {
        background: linear-gradient(135deg, #369c68 0%, #2e8b5a 100%);
    }
}

.btn-recompile.success {
    animation: success-flash 0.5s ease;
}

/* File item improvements */
.file-item {
    transition: all 0.15s ease;
}

.file-item:active {
    transform: scale(0.98);
    background: #252a2e;
}

/* ============================================
   FIND BAR STYLES
   ============================================ */

.find-bar {
    background: #2c3035;
    border-bottom: 1px solid #444;
    padding: 8px 15px;
    animation: slideDown 0.2s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.find-bar-content {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 600px;
}

.find-bar-content i {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.find-bar input {
    flex: 1;
    background: #1e1e1e;
    border: 1px solid #444;
    border-radius: 4px;
    color: var(--text-primary);
    padding: 6px 12px;
    font-family: var(--font-retro);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.find-bar input:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 5px rgba(0, 255, 255, 0.2);
}

.find-count {
    color: var(--text-secondary);
    font-size: 0.8rem;
    min-width: 70px;
    text-align: center;
}

.btn-find-nav {
    background: transparent;
    border: 1px solid #444;
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-find-nav:hover {
    background: #394046;
    color: var(--text-primary);
    border-color: var(--neon-cyan);
}

.btn-find-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 4px 8px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.15s;
}

.btn-find-close:hover {
    color: var(--neon-pink);
}

.pdf-find-bar {
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    z-index: 50;
}

/* ============================================
   HISTORY MODAL STYLES
   ============================================ */

.history-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.history-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.history-content {
    position: relative;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    background: var(--bg-card);
    border: 2px solid var(--neon-cyan);
    border-radius: 8px;
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    animation: modal-in 0.2s ease;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border-color);
    border-radius: 6px 6px 0 0;
}

.history-header h3 {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    color: var(--neon-cyan);
    display: flex;
    align-items: center;
    gap: 10px;
}

.history-tabs {
    display: flex;
    gap: 6px;
    margin-left: auto;
    margin-right: 10px;
}

.history-tab {
    background: rgba(0, 255, 255, 0.06);
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #b9c6d3;
    font-family: var(--font-retro);
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.history-tab.active {
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.7), rgba(0, 191, 255, 0.85));
    color: #001219;
    border-color: rgba(0, 255, 255, 0.8);
}

.history-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 0;
}

.history-panel {
    display: none;
    flex: 1;
    overflow: hidden;
}

.history-panel.active {
    display: flex;
    flex-direction: column;
}

.history-list {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.history-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(10, 15, 25, 0.9);
}

.history-toolbar label {
    font-size: 0.7rem;
    color: #9aa2aa;
}

.history-toolbar select {
    background: rgba(6, 10, 16, 0.9);
    border: 1px solid rgba(0, 255, 255, 0.2);
    color: #dcdcdc;
    font-family: var(--font-retro);
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
}

.history-version-grid {
    flex: 1;
    display: grid;
    grid-template-columns: 190px 1fr;
    min-height: 0;
}

.history-version-list {
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 10px;
    background: rgba(8, 12, 20, 0.9);
}

.history-version-item {
    padding: 8px 10px;
    border: 1px solid rgba(0, 255, 255, 0.12);
    border-radius: 6px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    background: rgba(8, 12, 20, 0.75);
}

.history-version-item:hover {
    border-color: rgba(0, 255, 255, 0.6);
    background: rgba(0, 255, 255, 0.08);
}

.history-version-item.active {
    border-color: rgba(0, 255, 255, 0.8);
    background: rgba(0, 255, 255, 0.18);
}

.history-version-item .version-title {
    font-size: 0.75rem;
    color: #e6e6e6;
}

.history-version-item .version-meta {
    font-size: 0.65rem;
    color: #9aa2aa;
    margin-top: 4px;
}

.history-version-preview {
    display: flex;
    flex-direction: column;
    padding: 10px;
    overflow: hidden;
    min-height: 0;
}

.history-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 6px 8px;
    background: rgba(10, 15, 25, 0.8);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 6px;
}

.history-preview-header span {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-preview-actions {
    display: flex;
    gap: 6px;
}

.history-preview-content {
    flex: 1;
    overflow: auto;
    margin-top: 8px;
    padding: 10px;
    background: #0f1114;
    border: 1px solid #333;
    border-radius: 6px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.8rem;
    color: #dcdcdc;
    white-space: pre-wrap;
    word-break: break-word;
}

.history-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.15s;
    cursor: pointer;
}

.history-item:hover {
    background: var(--bg-card-hover);
}

.history-item:last-child {
    border-bottom: none;
}

.history-time {
    color: var(--neon-cyan);
    font-size: 0.85rem;
    min-width: 80px;
}

.history-details {
    flex: 1;
}

.history-action {
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.history-file {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.history-restore {
    background: var(--neon-cyan);
    color: var(--bg-dark);
    border: none;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
}

.history-item:hover .history-restore {
    opacity: 1;
}

.history-empty {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.history-empty i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

/* Zoom controls in preview */
.preview-actions .btn-tool {
    padding: 4px 8px;
    font-size: 1rem;
}

/* Highlight for found text */
.text-highlight {
    background: rgba(255, 255, 0, 0.4);
    border-radius: 2px;
}

.text-highlight.current {
    background: rgba(255, 165, 0, 0.6);
    box-shadow: 0 0 4px rgba(255, 165, 0, 0.5);
}

/* ============================================
   PROJECTS + AUTH MODALS
   ============================================ */

.overlay-modal {
    position: fixed;
    inset: 0;
    z-index: 12000;
    display: none;
    align-items: center;
    justify-content: center;
}

.overlay-modal.active {
    display: flex;
}

.overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.overlay-content {
    position: relative;
    width: 92%;
    max-width: 640px;
    max-height: 85vh;
    background: var(--bg-card);
    border: 2px solid var(--neon-cyan);
    border-radius: 10px;
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    animation: modal-in 0.2s ease;
}

.overlay-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border-color);
    border-radius: 8px 8px 0 0;
}

.overlay-header h3 {
    font-family: var(--font-pixel);
    font-size: 0.8rem;
    color: var(--neon-cyan);
    display: flex;
    align-items: center;
    gap: 8px;
}

.overlay-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow: auto;
}

.auth-modal .overlay-content {
    border-color: var(--neon-magenta);
    box-shadow: 0 0 40px rgba(255, 0, 255, 0.2);
}

.auth-modal .overlay-header h3 {
    color: var(--neon-magenta);
}

.project-create {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-create input,
.project-create select {
    flex: 1;
    min-width: 160px;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    color: var(--text-primary);
    font-family: var(--font-retro);
}

.project-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.project-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid rgba(0, 255, 255, 0.2);
    background: rgba(0, 255, 255, 0.06);
}

.project-item.active {
    border-color: rgba(0, 255, 255, 0.6);
    background: rgba(0, 255, 255, 0.16);
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.project-name {
    font-size: 0.9rem;
    color: #f3f6ff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-meta {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    font-size: 0.65rem;
    color: var(--text-secondary);
}

.project-tag {
    padding: 2px 6px;
    border-radius: 999px;
    border: 1px solid rgba(0, 255, 255, 0.4);
    color: var(--neon-cyan);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.55rem;
}

.project-tag.local {
    border-color: rgba(57, 255, 20, 0.6);
    color: var(--neon-green);
}

.project-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.auth-tabs {
    display: flex;
    gap: 8px;
}

.auth-tab {
    background: rgba(255, 0, 255, 0.08);
    border: 1px solid rgba(255, 0, 255, 0.3);
    color: #f6d6ff;
    font-family: var(--font-retro);
    font-size: 0.75rem;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.auth-tab.active {
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.75), rgba(255, 20, 147, 0.9));
    color: #070710;
    border-color: transparent;
}

.auth-panel {
    display: none;
    flex-direction: column;
    gap: 10px;
}

.auth-panel.active {
    display: flex;
}

.auth-panel label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.auth-panel input {
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 6px;
    padding: 10px;
    font-family: var(--font-retro);
}

.auth-account-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 0, 255, 0.08);
    border: 1px solid rgba(255, 0, 255, 0.2);
    border-radius: 8px;
    padding: 12px;
}

.auth-account-avatar {
    font-size: 2rem;
    color: var(--neon-magenta);
}

.auth-account-name {
    font-size: 1rem;
    color: #f3f0ff;
}

.auth-account-email {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ============================================
   TEAM CHAT
   ============================================ */

.teamchat-fab {
    position: fixed;
    bottom: 80px;
    left: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--neon-magenta) 0%, var(--neon-pink) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9998;
    box-shadow: 0 4px 20px rgba(255, 0, 255, 0.4);
    transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
    animation: fab-pulse-magenta 3s ease-in-out infinite;
    touch-action: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.teamchat-fab i {
    font-size: 1.4rem;
    color: var(--bg-dark);
}

.teamchat-fab.active {
    transform: scale(0.95);
    opacity: 0.85;
}

.teamchat-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(255, 0, 255, 0.6);
}

@keyframes fab-pulse-magenta {
    0%,
    100% {
        box-shadow: 0 4px 20px rgba(255, 0, 255, 0.4);
    }
    50% {
        box-shadow: 0 4px 30px rgba(255, 0, 255, 0.7);
    }
}

.teamchat-panel {
    position: fixed;
    width: 380px;
    height: 520px;
    background: var(--bg-card);
    border: 2px solid var(--neon-magenta);
    border-radius: 12px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 45px rgba(255, 0, 255, 0.25);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.96);
    transition: opacity 0.25s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.25s;
    pointer-events: none;
    transform-origin: bottom left;
}

.teamchat-panel.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.teamchat-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(5, 5, 8, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s;
    z-index: 9997;
    pointer-events: none;
}

.teamchat-backdrop.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.teamchat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.15) 0%, rgba(255, 20, 147, 0.15) 100%);
    border-bottom: 1px solid var(--border-color);
}

.teamchat-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-pixel);
    font-size: 0.7rem;
    color: var(--neon-magenta);
}

.teamchat-project {
    font-family: var(--font-retro);
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.teamchat-controls {
    display: flex;
    gap: 6px;
}

.teamchat-btn {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    border: 1px solid rgba(255, 0, 255, 0.3);
    background: rgba(255, 0, 255, 0.08);
    color: var(--neon-magenta);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.teamchat-btn:hover {
    background: rgba(255, 0, 255, 0.2);
}

.teamchat-users {
    padding: 10px 12px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(10, 10, 18, 0.9);
}

.teamchat-users-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.teamchat-count {
    padding: 2px 6px;
    border-radius: 999px;
    background: rgba(255, 0, 255, 0.2);
    color: var(--neon-magenta);
    font-size: 0.65rem;
}

.teamchat-user-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.teamchat-user {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(255, 0, 255, 0.12);
    color: #f5d4ff;
    font-size: 0.7rem;
}

.teamchat-messages {
    flex: 1;
    padding: 12px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.teamchat-empty {
    padding: 18px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.teamchat-message {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(255, 0, 255, 0.1);
    border: 1px solid rgba(255, 0, 255, 0.2);
    max-width: 85%;
}

.teamchat-message.self {
    align-self: flex-end;
    background: rgba(57, 255, 20, 0.12);
    border-color: rgba(57, 255, 20, 0.4);
}

.teamchat-message .meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.65rem;
    color: var(--text-secondary);
}

.teamchat-message .body {
    font-size: 0.9rem;
    color: #f1f0ff;
    white-space: pre-wrap;
    word-break: break-word;
}

.teamchat-input-area {
    padding: 12px;
    display: flex;
    gap: 8px;
    border-top: 1px solid var(--border-color);
    background: rgba(8, 8, 14, 0.95);
}

.teamchat-input-area input {
    flex: 1;
    background: #0c0c15;
    border: 1px solid rgba(255, 0, 255, 0.2);
    color: var(--text-primary);
    padding: 8px 10px;
    border-radius: 8px;
    font-family: var(--font-retro);
}

.teamchat-send {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255, 0, 255, 0.4);
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.8), rgba(255, 20, 147, 0.9));
    color: #050508;
    cursor: pointer;
}

/* ============================================
   AI COPILOT STYLES
   ============================================ */

/* Floating Action Button */
.copilot-fab {
    position: fixed;
    bottom: 80px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-blue) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 9999;
    box-shadow: 0 4px 20px rgba(0, 255, 255, 0.4);
    transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.25s ease;
    animation: fab-pulse 3s ease-in-out infinite;
    touch-action: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.copilot-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(0, 255, 255, 0.6);
}

.copilot-fab.active {
    transform: scale(0.95);
    opacity: 0.85;
}

.copilot-fab i {
    font-size: 1.5rem;
    color: var(--bg-dark);
}

@keyframes fab-pulse {

    0%,
    100% {
        box-shadow: 0 4px 20px rgba(0, 255, 255, 0.4);
    }

    50% {
        box-shadow: 0 4px 30px rgba(0, 255, 255, 0.7);
    }
}

/* Copilot Panel */
.copilot-panel {
    position: fixed;
    width: 400px;
    /* Initial */
    height: 550px;
    /* Initial */
    background: var(--bg-card);
    border: 2px solid var(--neon-cyan);
    border-radius: 12px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 50px rgba(0, 255, 255, 0.3);
    overflow: hidden;
    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: opacity 0.25s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.25s;
    pointer-events: none;
    min-width: 300px;
    min-height: 400px;
    will-change: transform, opacity;
    transform-origin: bottom right;
}

/* Resizer handle for the panel */
.copilot-panel-resizer {
    position: absolute;
    top: 0;
    left: 0;
    width: 15px;
    height: 15px;
    cursor: nwse-resize;
    z-index: 10001;
}

.copilot-panel-resizer::after {
    content: '';
    position: absolute;
    top: 4px;
    left: 4px;
    width: 4px;
    height: 4px;
    border-top: 1px solid var(--neon-cyan);
    border-left: 1px solid var(--neon-cyan);
}

.copilot-panel.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.copilot-panel.dragging {
    transition: none;
}

.copilot-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(5, 5, 8, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s;
    z-index: 9998;
    pointer-events: none;
}

.copilot-backdrop.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

@keyframes panel-slide-in {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.copilot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: linear-gradient(135deg, rgba(0, 255, 255, 0.15) 0%, rgba(0, 191, 255, 0.1) 100%);
    border-bottom: 1px solid var(--border-color);
    cursor: grab;
}

.copilot-panel.dragging .copilot-header {
    cursor: grabbing;
}

.copilot-title {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--neon-cyan);
    font-family: var(--font-pixel);
    font-size: 0.7rem;
}

.copilot-title i {
    font-size: 1.2rem;
}

.copilot-controls {
    display: flex;
    gap: 8px;
}

.copilot-settings {
    display: none;
    padding: 12px 16px 14px;
    border-bottom: 1px solid rgba(0, 255, 255, 0.15);
    background: linear-gradient(180deg, rgba(6, 12, 18, 0.95), rgba(10, 14, 22, 0.9));
}

.copilot-settings.visible {
    display: block;
}

.copilot-settings-label {
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: rgba(130, 220, 230, 0.9);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.copilot-settings-input,
.copilot-settings-select {
    width: 100%;
    background: rgba(10, 16, 24, 0.9);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 10px;
    color: #d9f4ff;
    padding: 10px 12px;
    font-family: 'VT323', monospace;
    font-size: 0.95rem;
    outline: none;
    margin-bottom: 10px;
}

.copilot-settings-input:focus,
.copilot-settings-select:focus {
    border-color: rgba(0, 255, 255, 0.6);
    box-shadow: 0 0 12px rgba(0, 255, 255, 0.25);
}

.copilot-settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.copilot-settings-refresh {
    background: transparent;
    border: 1px solid rgba(0, 255, 255, 0.3);
    color: #a7f3ff;
    border-radius: 8px;
    padding: 4px 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copilot-settings-refresh:hover {
    background: rgba(0, 255, 255, 0.12);
    border-color: rgba(0, 255, 255, 0.6);
}

.copilot-settings-hint {
    font-size: 0.75rem;
    color: rgba(160, 200, 215, 0.8);
}

.copilot-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.copilot-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
}

/* Context Display */
.copilot-context {
    background: #1a1a2a;
    border-bottom: 1px solid var(--border-color);
    padding: 10px 15px;
    max-height: 120px;
    overflow: hidden;
}

.context-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--neon-magenta);
    margin-bottom: 8px;
}

.context-label span {
    flex: 1;
}

.context-clear {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2px;
}

.context-clear:hover {
    color: var(--neon-pink);
}

.context-code {
    background: #0d0d15;
    border: 1px solid #333;
    border-radius: 4px;
    padding: 8px;
    font-family: 'Consolas', monospace;
    font-size: 0.75rem;
    color: #a0a0c0;
    max-height: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: pre;
    margin: 0;
}

/* Messages Area */
.copilot-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.copilot-welcome {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-secondary);
}

.copilot-welcome i {
    font-size: 2.5rem;
    color: var(--neon-cyan);
    margin-bottom: 15px;
    display: block;
}

.copilot-welcome p {
    margin-bottom: 10px;
    line-height: 1.5;
}

.copilot-welcome .hint {
    font-size: 0.85rem;
    opacity: 0.7;
    font-style: italic;
}

.copilot-message {
    display: flex;
    gap: 10px;
    animation: message-in 0.3s ease;
}

@keyframes message-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.copilot-message.user {
    flex-direction: row-reverse;
}

.copilot-message .avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.copilot-message.user .avatar {
    background: linear-gradient(135deg, var(--neon-magenta) 0%, var(--neon-pink) 100%);
}

.copilot-message.assistant .avatar {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-blue) 100%);
}

.copilot-message .avatar i {
    color: var(--bg-dark);
    font-size: 0.9rem;
}

.copilot-message .content {
    max-width: 80%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.9rem;
    line-height: 1.5;
}

.copilot-message.user .content {
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.2) 0%, rgba(255, 20, 147, 0.15) 100%);
    border: 1px solid rgba(255, 0, 255, 0.3);
    border-radius: 12px 12px 0 12px;
}

.copilot-message.assistant .content {
    background: rgba(0, 255, 255, 0.08);
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 12px 12px 12px 0;
}

.copilot-message .content pre {
    background: #0d0d15;
    border: 1px solid #333;
    border-radius: 6px;
    padding: 10px;
    margin: 8px 0;
    overflow-x: auto;
    font-size: 0.8rem;
}

.copilot-message .content code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.85em;
}

/* Attachments */
.copilot-attachments {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    padding: 0 15px;
}

.copilot-attachment {
    position: relative;
    width: 60px;
    height: 60px;
    border-radius: 8px;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.copilot-attachment img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.copilot-attachment .remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    background: var(--neon-pink);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

/* Input Area */
.copilot-input-area {
    border-top: 1px solid var(--border-color);
    padding: 12px 15px;
    background: rgba(0, 0, 0, 0.2);
}

.copilot-input-row {
    display: flex;
    align-items: flex-end;
    gap: 8px;
}

.copilot-action-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.copilot-action-btn:hover {
    background: rgba(0, 255, 255, 0.1);
    color: var(--neon-cyan);
    border-color: var(--neon-cyan);
}

.copilot-action-btn.recording {
    background: rgba(255, 0, 0, 0.2);
    color: #ff4444;
    border-color: #ff4444;
    animation: recording-pulse 1s ease-in-out infinite;
}

@keyframes recording-pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(255, 0, 0, 0.4);
    }

    50% {
        box-shadow: 0 0 0 8px rgba(255, 0, 0, 0);
    }
}

.copilot-input-row textarea {
    flex: 1;
    background: #1a1a2a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 10px 12px;
    font-family: var(--font-retro);
    font-size: 1rem;
    resize: none;
    outline: none;
    min-height: 36px;
    max-height: 100px;
    transition: border-color 0.2s;
}

.copilot-input-row textarea:focus {
    border-color: var(--neon-cyan);
}

.copilot-send {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-blue) 100%);
    border: none;
    color: var(--bg-dark);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
}

.copilot-send:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 255, 255, 0.4);
}

.copilot-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.copilot-send i {
    font-size: 1rem;
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--neon-cyan);
    border-radius: 50%;
    animation: typing-bounce 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing-bounce {

    0%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-8px);
    }
}

/* Mobile Responsive */
@media (max-width: 480px) {
    .copilot-panel {
        width: calc(100vw - 20px);
        right: 10px;
        bottom: 70px;
        height: 60vh;
    }

    .copilot-fab {
        right: 15px;
        bottom: 70px;
        width: 50px;
        height: 50px;
    }
}

/* Loading dots animation */
.copilot-message.loading {
    background: rgba(0, 255, 255, 0.05);
}

.loading-dots {
    display: flex;
    gap: 6px;
    padding: 8px 4px;
}

.loading-dots span {
    width: 10px;
    height: 10px;
    background: var(--neon-cyan);
    border-radius: 50%;
    animation: loading-bounce 1.4s ease-in-out infinite;
}

.loading-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loading-bounce {

    0%,
    80%,
    100% {
        transform: scale(0.6);
        opacity: 0.5;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Image preview in input area */
.copilot-input-area .image-preview {
    position: relative;
    padding: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    margin-right: 8px;
    flex-shrink: 0;
}

.copilot-input-area .image-preview img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid var(--neon-cyan);
}

.copilot-input-area .remove-image {
    position: absolute;
    top: 2px;
    right: 2px;
    background: #ff4444;
    color: white;
    border: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    padding: 0;
}

.copilot-input-area .remove-image:hover {
    background: #ff6666;
}

/* Message with image */
.copilot-message .message-image {
    max-width: 200px;
    max-height: 150px;
    border-radius: 8px;
    margin-bottom: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.copilot-message .message-content {
    line-height: 1.5;
}

.copilot-message .message-content code {
    background: rgba(0, 0, 0, 0.4);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--neon-cyan);
}

.copilot-message .message-content pre {
    background: rgba(0, 0, 0, 0.5);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0;
    border-left: 3px solid var(--neon-cyan);
}

.copilot-message .message-content pre code {
    background: none;
    padding: 0;
    display: block;
    white-space: pre-wrap;
}

/* ============================================
   PDF VIEWER ENHANCEMENTS (Text Selection & SyncTex)
   ============================================ */

.textLayer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    opacity: 1.0;
    line-height: 1.0;
    z-index: 2;
    transform-origin: 0 0;
}

.textLayer span,
.textLayer br {
    color: transparent;
    position: absolute;
    white-space: pre;
    cursor: text;
    transform-origin: 0% 0%;
}

::selection {
    background: rgba(0, 255, 255, 0.3);
}

.annotationLayer {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 3;
}

.pdf-link-annotation {
    position: absolute;
    cursor: pointer;
    pointer-events: auto;
    background: rgba(128, 200, 255, 0.0);
    transition: background 0.2s;
}

.pdf-link-annotation:hover {
    background: rgba(128, 200, 255, 0.1);
}

.preview-view.highlight-citations .pdf-link-annotation {
    border: 1.5px solid #2ecc71;
    background: rgba(46, 204, 113, 0.15);
    border-radius: 2px;
}

/* ============================================
   MOBILE RESPONSIVE STYLES
   ============================================ */

/* Large tablets and below (max-width: 1024px) */
@media screen and (max-width: 1024px) {
    .header {
        padding: 1rem 1.5rem;
    }

    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .header-stats {
        gap: 1rem;
    }

    .stat-box {
        min-width: 80px;
        padding: 0.5rem 0.75rem;
    }

    .toolbar {
        padding: 0.75rem 1.5rem;
        top: 110px;
    }

    .main-content {
        padding: 1.5rem;
    }

    .papers-container {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 1rem;
    }
}

@media screen and (max-width: 900px) {
    .editor-sidebar {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        width: min(82vw, 320px);
        min-width: min(82vw, 320px);
        transform: translateX(0);
        transition: transform 0.25s ease;
        z-index: 1301;
        border-right: 1px solid rgba(0, 255, 255, 0.2);
        opacity: 1;
    }

    .editor-sidebar.collapsed {
        width: min(82vw, 320px);
        min-width: min(82vw, 320px);
        transform: translateX(-100%);
        opacity: 1;
        border-right: 1px solid rgba(0, 255, 255, 0.2);
    }

    .sidebar-tabs {
        padding: 10px;
    }

    .sidebar-tab {
        font-size: 0.75rem;
    }

    .editor-container {
        position: relative;
    }

    .editor-toolbar {
        position: sticky;
        top: 0;
        z-index: 10;
    }
}

/* Tablets (max-width: 768px) */
@media screen and (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .header-action {
        flex: 1;
        min-width: 160px;
        justify-content: center;
    }

    .logo-section {
        justify-content: center;
    }

    .logo-icon {
        font-size: 2rem;
    }

    .logo-text h1 {
        font-size: 1.1rem;
    }

    .tagline {
        font-size: 1rem;
        letter-spacing: 2px;
    }

    .latex-autocomplete {
        min-width: 180px;
        max-width: 260px;
    }

    .autocomplete-item {
        font-size: 0.95rem;
    }

    .header-stats {
        display: flex;
        flex-wrap: nowrap;
        justify-content: center;
        gap: 0.5rem;
        width: 100%;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .nav-tabs {
        order: -1;
        width: 100%;
        display: flex;
        justify-content: center;
        margin-bottom: 0.25rem;
    }

    .nav-tab {
        flex: 1;
        text-align: center;
        max-width: 120px;
    }

    .presence-list {
        margin-right: 0.5rem;
        padding-right: 0.25rem;
    }

    .user-avatar {
        width: 30px;
        height: 30px;
        margin-left: -8px;
    }

    .stat-box {
        min-width: 70px;
        padding: 0.5rem 0.6rem;
    }

    .stat-label {
        font-size: 0.55rem;
        margin-bottom: 4px;
    }

    .stat-value {
        font-size: 1rem;
    }

    .toolbar {
        padding: 0.75rem 1rem;
        top: auto;
        position: relative;
    }

    .toolbar-content {
        flex-direction: column;
        gap: 0.75rem;
    }

    .search-box {
        max-width: 100%;
        width: 100%;
    }

    .toolbar-controls {
        width: 100%;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .sort-control {
        flex: 1;
        min-width: fit-content;
    }

    .sort-control label {
        display: none;
    }

    .main-content {
        padding: 1rem;
    }

    .papers-container {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 0.75rem;
    }

    .paper-thumbnail {
        height: 220px;
    }

    .paper-info {
        padding: 0.75rem;
    }

    .paper-title {
        font-size: 0.95rem;
    }

    .paper-meta {
        font-size: 0.8rem;
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .paper-year-badge {
        font-size: 0.5rem;
        padding: 0.2rem 0.4rem;
    }

    /* Modal on tablet */
    .modal-content {
        width: 98%;
        height: 95%;
    }

    .modal-header {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .modal-title {
        font-size: 1rem;
        flex: 1;
        min-width: 0;
    }

    .modal-title span {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .modal-controls {
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .pdf-info-panel {
        flex-wrap: wrap;
        padding: 0.5rem;
    }

    /* Editor on tablet */
    #editor-view {
        height: calc(100vh - 180px);
    }

    .editor-container {
        flex-direction: column;
        height: 100%;
    }

    .editor-sidebar {
        width: 100%;
        max-width: none;
        height: auto;
        min-height: 60px;
        max-height: 120px;
        border-right: none;
        border-bottom: 1px solid #333;
        overflow: hidden;
    }

    .editor-sidebar.collapsed {
        min-height: 0;
        max-height: 0;
        border-bottom: none;
    }

    .editor-section-title {
        padding: 8px 12px;
        font-size: 0.65rem;
    }

    .file-list {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        padding: 8px 10px;
        overflow-x: auto;
        overflow-y: hidden;
        flex-direction: row;
        align-content: flex-start;
    }

    .file-item {
        padding: 4px 10px;
        font-size: 0.75rem;
        border-radius: 15px;
        background: #2f3439;
        border: 1px solid #444;
        border-left: none;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .file-item.active {
        background: #148c5a;
        border-color: #148c5a;
        color: white;
    }

    .file-item i {
        font-size: 0.7rem;
    }

    .editor-main {
        flex: 1;
        min-height: 0;
        display: flex;
        flex-direction: column;
    }

    .editor-toolbar {
        height: auto;
        min-height: 44px;
        padding: 6px 10px;
        flex-wrap: wrap;
        gap: 6px;
    }

    .toolbar-left {
        flex: 1;
        display: flex;
        align-items: center;
        gap: 6px;
        flex-wrap: wrap;
        min-width: 0;
    }

    .toolbar-right {
        display: flex;
        gap: 4px;
    }

    .current-file {
        font-size: 0.75rem;
        max-width: 100px;
        padding: 2px 6px;
    }

    .btn-tool {
        padding: 6px 8px;
        font-size: 0.8rem;
    }

    /* Mobile SOURCE/PREVIEW tabs - make them prominent */
    .mobile-editor-tabs {
        display: flex !important;
        gap: 0;
        margin-left: auto;
        background: #1a1a1a;
        padding: 3px;
        border-radius: 20px;
        border: 1px solid #444;
        flex-shrink: 0;
    }

    .btn-mobile-tab {
        background: transparent;
        border: none;
        color: #888;
        padding: 6px 14px;
        font-size: 0.65rem;
        font-family: var(--font-pixel);
        cursor: pointer;
        border-radius: 16px;
        transition: all 0.2s;
        font-weight: bold;
    }

    .btn-mobile-tab.active {
        background: var(--neon-cyan);
        color: #000;
        box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    }

    .editor-content-area {
        flex: 1;
        flex-direction: column;
        min-height: 0;
        position: relative;
    }

    .source-view {
        width: 100% !important;
        min-width: auto;
        height: 100%;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
    }

    .preview-view {
        width: 100% !important;
        min-width: auto;
        height: 100%;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
    }

    /* Hide panel resizer on mobile */
    .panel-resizer {
        display: none;
    }

    /* Preview toolbar on mobile */
    .preview-toolbar {
        height: auto;
        min-height: 40px;
        padding: 6px 10px;
        flex-wrap: wrap;
        gap: 6px;
    }

    .btn-recompile {
        padding: 6px 14px;
        min-width: auto;
        height: 32px;
        font-size: 0.75rem;
    }

    .btn-recompile .btn-text {
        display: none;
    }

    .btn-recompile i {
        font-size: 1rem;
    }

    .preview-actions {
        display: flex;
        align-items: center;
        gap: 4px;
        flex-wrap: wrap;
    }

    .preview-actions .btn-tool {
        padding: 5px 8px;
        font-size: 0.85rem;
    }

    .btn-compile-download {
        padding: 5px 10px;
    }

    .btn-compile-download .btn-text {
        display: none;
    }

    .page-count {
        font-size: 0.7rem;
        padding: 2px 6px;
    }

    /* PDF viewer container */
    #pdf-viewer-container {
        flex: 1;
        overflow: auto;
    }

    /* Line numbers smaller on mobile */
    .line-numbers {
        width: 35px;
        min-width: 35px;
        font-size: 11px;
    }

    .line-numbers span {
        padding-right: 6px;
    }

    .code-editor {
        font-size: 12px;
        padding: 12px 10px;
    }

    .copilot-settings {
        padding: 10px 12px 12px;
    }

    .copilot-settings-input,
    .copilot-settings-select {
        font-size: 0.9rem;
    }

    .latex-autocomplete {
        min-width: 160px;
        max-width: 220px;
    }

    .autocomplete-item {
        font-size: 0.9rem;
        padding: 6px 10px;
    }

    /* Find bar mobile */
    .find-bar {
        padding: 6px 10px;
    }

    .find-bar-content {
        gap: 6px;
    }

    .find-bar input {
        font-size: 0.85rem;
        padding: 4px 8px;
        min-width: 80px;
        flex: 1;
    }

    .find-count {
        font-size: 0.65rem;
        white-space: nowrap;
    }

    /* Mobile panel toggle - show only one at a time */
    .editor-content-area.show-source .source-view {
        display: flex;
        z-index: 2;
    }

    .editor-content-area.show-source .preview-view {
        display: none;
    }

    .editor-content-area.show-preview .source-view {
        display: none;
    }

    .editor-content-area.show-preview .preview-view {
        display: flex;
        z-index: 2;
    }

    /* AI Copilot on tablet */
    .copilot-panel {
        width: 350px;
    }
}

/* Mobile phones (max-width: 480px) */
@media screen and (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .header {
        padding: 0.75rem;
    }

    .tagline {
        display: none;
    }

    .header-actions {
        gap: 0.4rem;
    }

    .header-action {
        padding: 0.4rem 0.6rem;
        font-size: 0.55rem;
        min-width: auto;
    }

    .header-action .action-value {
        display: none;
    }

    .logo-section {
        gap: 0.5rem;
    }

    .logo-icon {
        font-size: 1.5rem;
    }

    .logo-text h1 {
        font-size: 0.9rem;
        letter-spacing: 1px;
    }

    .tagline {
        font-size: 0.85rem;
        letter-spacing: 1px;
    }

    .header-stats {
        gap: 0.4rem;
    }

    .nav-tabs {
        margin-bottom: 0.5rem;
    }

    .nav-tab {
        font-size: 0.6rem;
        padding: 0.4rem 0.6rem;
    }

    .presence-list {
        margin: 0 0.25rem;
        max-width: 120px;
        overflow: hidden;
    }

    .user-avatar {
        width: 26px;
        height: 26px;
        margin-left: -6px;
    }

    .stat-box {
        min-width: 60px;
        padding: 0.4rem 0.5rem;
        clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
    }

    .stat-label {
        font-size: 0.5rem;
        margin-bottom: 3px;
    }

    .stat-value {
        font-size: 0.85rem;
    }

    .toolbar {
        padding: 0.5rem 0.75rem;
    }

    .search-box {
        padding: 0.4rem 0.75rem;
    }

    .search-box input {
        font-size: 1rem;
    }

    .search-box i {
        font-size: 1rem;
        margin-right: 0.5rem;
    }

    .toolbar-controls {
        gap: 0.5rem;
    }

    .sort-control select {
        font-size: 0.9rem;
        padding: 0.4rem 0.6rem;
    }

    .btn-sort-order,
    .btn-view,
    .btn-refresh {
        font-size: 1rem;
        padding: 0.4rem 0.6rem;
    }

    .main-content {
        padding: 0.75rem;
        min-height: calc(100vh - 200px);
    }

    .papers-container {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .paper-card {
        display: flex;
        flex-direction: row;
    }

    .paper-thumbnail {
        width: 120px;
        height: 160px;
        flex-shrink: 0;
    }

    .paper-info {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        border-top: none;
        border-left: 1px solid var(--border-color);
        padding: 0.75rem;
    }

    .paper-title {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
        -webkit-line-clamp: 3;
        line-clamp: 3;
    }

    .paper-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
        font-size: 0.75rem;
    }

    /* Modal on mobile */
    .modal-content {
        width: 100%;
        height: 100%;
        max-width: none;
        border: none;
        border-radius: 0;
    }

    .modal-header {
        padding: 0.5rem 0.75rem;
    }

    .modal-title {
        font-size: 0.9rem;
        gap: 0.5rem;
    }

    .modal-title i {
        font-size: 1rem;
    }

    .btn-modal {
        padding: 0.4rem;
        font-size: 1rem;
    }

    .nav-divider {
        margin: 0 0.25rem;
    }

    .pdf-info-panel {
        padding: 0.4rem 0.5rem;
        gap: 0.5rem;
    }

    .info-item {
        padding: 0.25rem 0.4rem;
    }

    .info-label {
        font-size: 0.5rem;
    }

    .info-value {
        font-size: 0.85rem;
    }

    /* Empty state on mobile */
    .empty-state {
        padding: 2rem;
    }

    .empty-state i {
        font-size: 3rem;
    }

    .empty-state h3 {
        font-size: 0.85rem;
    }

    .empty-state p {
        font-size: 1rem;
    }

    /* Loading state on mobile */
    .loading {
        padding: 2rem;
    }

    .loading-spinner {
        width: 40px;
        height: 40px;
    }

    .loading span {
        font-size: 0.7rem;
    }

    /* Footer on mobile */
    .footer {
        padding: 0.75rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .footer-text {
        font-size: 0.7rem;
    }

    /* Help modal on mobile */
    .help-content {
        width: 95%;
        max-width: none;
        max-height: 85vh;
    }

    .overlay-content {
        width: 96%;
        max-height: 90vh;
    }

    .project-create {
        flex-direction: column;
    }

    .auth-tabs {
        flex-wrap: wrap;
    }

    .help-header h2 {
        font-size: 0.75rem;
    }

    .shortcut-group h3 {
        font-size: 0.6rem;
    }

    .shortcut {
        font-size: 0.85rem;
    }

    .shortcut kbd {
        font-size: 0.7rem;
        padding: 0.2rem 0.4rem;
    }

    /* ==========================================
       EDITOR MOBILE SPECIFIC (480px)
       ========================================== */

    #editor-view {
        height: calc(100vh - 150px);
    }

    .editor-sidebar {
        max-height: none;
        min-height: 0;
        height: 100vh;
    }

    .editor-section-title {
        padding: 6px 10px;
        font-size: 0.6rem;
    }

    .file-list {
        padding: 8px 6px;
        gap: 6px;
    }

    .file-item {
        padding: 3px 8px;
        font-size: 0.7rem;
    }

    .editor-toolbar {
        min-height: 40px;
        padding: 4px 8px;
    }

    .current-file {
        font-size: 0.7rem;
        max-width: 80px;
    }

    .btn-tool {
        padding: 5px 6px;
        font-size: 0.75rem;
    }

    .mobile-editor-tabs {
        padding: 2px;
    }

    .btn-mobile-tab {
        padding: 5px 10px;
        font-size: 0.6rem;
    }

    .preview-toolbar {
        min-height: 36px;
        padding: 4px 8px;
    }

    .btn-recompile {
        padding: 5px 10px;
        height: 28px;
    }

    .preview-actions .btn-tool {
        padding: 4px 6px;
    }

    .line-numbers {
        width: 30px;
        min-width: 30px;
        font-size: 10px;
    }

    .code-editor {
        font-size: 11px;
        padding: 10px 8px;
    }

    .page-count {
        font-size: 0.6rem;
    }

    /* Toast on mobile */
    .toast {
        left: 50%;
        transform: translateX(-50%);
        right: auto;
        max-width: 90%;
        font-size: 0.9rem;
    }

    /* AI Copilot panel on mobile */
    .copilot-fab {
        bottom: 70px;
        right: 15px;
        width: 50px;
        height: 50px;
    }

    .copilot-fab i {
        font-size: 1.3rem;
    }

    .copilot-panel {
        width: 100%;
        height: 70vh;
        right: 0;
        bottom: 0;
        border-radius: 16px 16px 0 0;
        transform: translateY(100%);
        transform-origin: bottom center;
    }

    .copilot-panel.open {
        transform: translateY(0);
    }

    .copilot-header {
        padding: 0.75rem 1rem;
    }

    .copilot-title span {
        font-size: 0.9rem;
    }

    .copilot-input-area {
        padding: 0.75rem;
    }

    .copilot-input-row textarea {
        font-size: 0.95rem;
    }

    .copilot-btn {
        width: 34px;
        height: 34px;
    }

    /* Team chat on mobile */
    .teamchat-fab {
        bottom: 130px;
        left: 15px;
        width: 50px;
        height: 50px;
    }

    .teamchat-panel {
        width: 100%;
        height: 65vh;
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 16px 16px 0 0;
        transform: translateY(100%);
        transform-origin: bottom center;
    }

    .teamchat-panel.open {
        transform: translateY(0);
    }

    /* Editor specific mobile styles */
    .editor-toolbar {
        padding: 0.5rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .toolbar-left,
    .toolbar-right {
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .current-file {
        font-size: 0.8rem;
        max-width: 120px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .btn-tool {
        padding: 0.4rem;
        font-size: 0.9rem;
    }

    .btn-recompile {
        padding: 0.4rem 0.6rem;
    }

    .btn-recompile .btn-text,
    .btn-compile-download .btn-text {
        display: none;
    }

    .preview-toolbar {
        padding: 0.5rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .preview-actions {
        flex-wrap: wrap;
        gap: 0.25rem;
    }

    .page-count {
        font-size: 0.7rem;
    }

    /* Find bar on mobile */
    .find-bar {
        padding: 0.5rem;
    }

    .find-bar-content {
        gap: 0.5rem;
    }

    .find-bar input {
        font-size: 0.9rem;
        min-width: 100px;
    }

    .find-count {
        font-size: 0.7rem;
        display: none;
    }

    /* History modal on mobile */
    .history-content {
        width: 95%;
        max-width: none;
        max-height: 80vh;
    }

    .history-header h3 {
        font-size: 0.9rem;
    }

    .history-entry {
        padding: 0.75rem;
    }

    .history-tabs {
        flex-wrap: wrap;
        gap: 4px;
        margin-right: 0;
    }

    .history-version-grid {
        grid-template-columns: 1fr;
    }

    .history-version-list {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        max-height: 180px;
    }

    .editor-stats {
        display: none;
    }

    .compile-log-panel {
        top: 0;
    }
}

/* Extra small phones (max-width: 360px) */
@media screen and (max-width: 360px) {
    .logo-text h1 {
        font-size: 0.75rem;
    }

    .tagline {
        font-size: 0.7rem;
    }

    .nav-tab {
        font-size: 0.55rem;
        padding: 0.35rem 0.5rem;
    }

    .stat-box {
        min-width: 50px;
    }

    .stat-label {
        font-size: 0.45rem;
    }

    .stat-value {
        font-size: 0.75rem;
    }

    .paper-thumbnail {
        width: 100px;
        height: 130px;
    }

    .paper-title {
        font-size: 0.85rem;
    }
}

/* Landscape mode adjustments for mobile */
@media screen and (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: 0.5rem 1rem;
    }

    .header-content {
        flex-direction: row;
        flex-wrap: nowrap;
    }

    .logo-icon {
        font-size: 1.5rem;
    }

    .logo-text h1 {
        font-size: 0.8rem;
    }

    .tagline {
        display: none;
    }

    .header-stats {
        gap: 0.5rem;
    }

    .nav-tabs {
        order: 0;
        width: auto;
        margin-bottom: 0;
    }

    .toolbar {
        padding: 0.5rem 1rem;
    }

    .main-content {
        padding: 0.5rem 1rem;
    }

    .papers-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }

    .paper-thumbnail {
        height: 150px;
    }

    .modal-content {
        height: 100%;
    }

    .copilot-panel {
        height: 100vh;
        width: 50%;
    }
}

/* Pull to refresh indicator styling */
.pull-to-refresh {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: var(--bg-card);
    border: 2px solid var(--neon-cyan);
    padding: 0.75rem 1.5rem;
    font-family: var(--font-retro);
    color: var(--neon-cyan);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 200;
    transition: transform 0.3s ease;
    border-radius: 0 0 8px 8px;
}

.pull-to-refresh.active {
    transform: translateX(-50%) translateY(0);
}

.pull-to-refresh i {
    animation: bounce-down 0.6s infinite;
}

@keyframes bounce-down {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(5px);
    }
}

/* Ensure mobile editor tabs are hidden by default on desktop */
.mobile-editor-tabs {
    display: none;
}

/* Dark mode preference support */
@media (prefers-color-scheme: light) {
    /* App is designed for dark mode, but this is a placeholder for future light mode support */
}