:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-glow: rgba(37, 99, 235, 0.08);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-blue: #2563eb;
    --accent-blue-rgb: 37, 99, 235;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition-speed: 0.3s;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Project Header Styling (Research Paper style) */
.project-header {
    padding: 3.5rem 2rem 2.5rem 2rem;
    text-align: center;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}
.project-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 2.2rem;
    line-height: 1.25;
    color: var(--text-primary);
    max-width: 900px;
    margin: 0 auto;
    letter-spacing: -0.02em;
}
.project-venue {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: -0.5rem;
}
.project-authors {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1rem;
    max-width: 800px;
    margin: 0.5rem auto;
}
.author {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--accent-blue);
}
.author sup {
    font-size: 0.75rem;
    color: var(--text-secondary);
}
.project-affiliations {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.affiliation sup {
    font-size: 0.7rem;
    color: var(--text-secondary);
}
.project-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}
.pill-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: #1e293b;
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 50px;
    text-decoration: none;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #1e293b;
}
.pill-btn:hover {
    background: #0f172a;
    border-color: #0f172a;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.icon {
    display: inline-block;
    width: 16px;
    height: 16px;
}

/* Control Area */
.control-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.control-area label {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-secondary);
}

.styled-select {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1.2rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.styled-select:hover, .styled-select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 10px rgba(var(--accent-blue-rgb), 0.2);
}

/* Main Layout */
.app-main {
    flex: 1;
    padding: 2rem 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Section elements */
.section-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    position: relative;
    padding-left: 0.75rem;
}

.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 3.5px;
    background: var(--accent-blue);
    border-radius: 2px;
}

.subsection-title {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Poster Section Styling */
.poster-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.poster-container {
    width: 100%;
    background: #f1f5f9;
    border-radius: 8px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

/* Visualizations Section Header */
.vis-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

/* Local Point Cloud Viewer Row */
.local-viewers-section {
    margin-bottom: 2rem;
}

.local-viewers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

.viewer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-speed);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
    position: relative;
}

.viewer-card h3, .viewer-card h2 {
    color: var(--text-primary);
}

.viewer-card .card-footer {
    color: var(--text-secondary);
}

.viewer-card:hover {
    border-color: #cbd5e1;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.card-header h2, .card-header h3 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, rgba(var(--accent-green), 0.1) 0%, rgba(var(--accent-green), 0.02) 100%);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--accent-green);
}

.btn-primary:hover {
    background: var(--accent-green);
    color: #ffffff;
    border-color: var(--accent-green);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

.canvas-container {
    height: 180px;
    background: #000000;
    position: relative;
    overflow: hidden;
    border: 1px solid #1e293b;
    border-radius: 8px;
}

.card-footer {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.75rem;
    text-align: center;
    font-weight: 500;
}

/* Badges */
.badge {
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    text-transform: uppercase;
}

.badge-query {
    background: rgba(var(--accent-blue-rgb), 0.1);
    color: var(--accent-blue);
    border: 1px solid rgba(var(--accent-blue-rgb), 0.2);
}

.badge-correct {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-incorrect {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Lower Section Split Panel Layout */
.global-vis-grid {
    display: grid;
    grid-template-columns: 320px 1.5fr 0.75fr;
    gap: 1.5rem;
    align-items: stretch;
}

/* Map Button Tints (Green for ON, Grey for OFF) */
.global-3d-section .header-controls .btn-primary,
.traj-map-panel .header-controls .btn-primary {
    background: rgba(16, 185, 129, 0.1) !important;
    border-color: rgba(16, 185, 129, 0.3) !important;
    color: #10b981 !important;
    box-shadow: none !important;
}
.global-3d-section .header-controls .btn-primary:hover,
.traj-map-panel .header-controls .btn-primary:hover {
    background: #10b981 !important;
    color: #ffffff !important;
    border-color: #10b981 !important;
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.3) !important;
}
.global-3d-section .header-controls .btn-secondary,
.traj-map-panel .header-controls .btn-secondary {
    background: rgba(100, 116, 139, 0.1) !important;
    border-color: rgba(100, 116, 139, 0.3) !important;
    color: #64748b !important;
    box-shadow: none !important;
}
.global-3d-section .header-controls .btn-secondary:hover,
.traj-map-panel .header-controls .btn-secondary:hover {
    background: #64748b !important;
    color: #ffffff !important;
    border-color: #64748b !important;
    box-shadow: 0 0 12px rgba(100, 116, 139, 0.3) !important;
}


.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
}

.card-inner {
    background: #f8fafc;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
}

/* Left Summary Panel */
.info-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.info-group {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.info-value {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

.file-path {
    font-family: monospace;
    background: #f1f5f9;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    border: 1px solid #e2e8f0;
    color: #0f172a;
}

.divider {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 0.25rem 0;
}

/* Timeline progress indicators */
.refinement-timeline {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.refinement-timeline h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.timeline-step {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    position: relative;
}

.timeline-step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 11px;
    top: 24px;
    bottom: -16px;
    width: 2px;
    background: #e2e8f0;
}

.step-dot {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #ffffff;
    border: 2px solid #cbd5e1;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all var(--transition-speed);
}

.timeline-step.active .step-dot {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #ffffff;
}

.timeline-step.correct .step-dot {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: #ffffff;
}

.timeline-step.incorrect .step-dot {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: #ffffff;
}

.step-details {
    display: flex;
    flex-direction: column;
}

.step-title {
    font-weight: 600;
    font-size: 0.85rem;
}

.step-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Slider Controls */
.map-controls h4 {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.slider-container {
    margin-bottom: 1.25rem;
}

.styled-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 5px;
    border-radius: 5px;
    background: #e2e8f0;
    outline: none;
    cursor: pointer;
}

.styled-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(var(--accent-blue-rgb), 0.3);
    transition: transform 0.1s;
}

.styled-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-top: 0.5rem;
    padding: 0 2px;
}

.btn {
    display: inline-block;
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
    text-align: center;
    width: 100%;
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(var(--accent-blue-rgb), 0.08) 0%, rgba(var(--accent-blue-rgb), 0.02) 100%);
    border-color: rgba(var(--accent-blue-rgb), 0.2);
    color: var(--accent-blue);
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: #ffffff;
    border-color: var(--accent-blue);
    box-shadow: 0 0 12px rgba(var(--accent-blue-rgb), 0.2);
}

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

/* Map Containers */
.map-section, .global-3d-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.map-container {
    width: 100%;
    height: 480px;
    border-radius: 8px;
    background: #f1f5f9;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

/* Leaflet map customization */
.leaflet-container {
    font-family: var(--font-body);
}

.leaflet-bar {
    border: 1px solid var(--border-color) !important;
    box-shadow: none !important;
}

.leaflet-bar a {
    background-color: #ffffff !important;
    color: var(--text-primary) !important;
    border-bottom: 1px solid var(--border-color) !important;
}

.leaflet-bar a:hover {
    background-color: #f1f5f9 !important;
    color: var(--accent-blue) !important;
}

/* Help tooltips */
.help-tooltip {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.05);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-weight: 500;
    cursor: help;
}

/* Footer Styling */
.app-footer {
    padding: 1rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: #ffffff;
}

/* Leaflet Canvas overlay scaling styling */
.leaflet-pixellayer-dot {
    transition: fill var(--transition-speed);
}

/* Logos & New Sections Styles */
.project-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    margin-top: 0.5rem;
}
.institution-logo {
    height: 70px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.05));
}

.motivation-section, .network-section, .results-section {
    margin-left: 15%;
    margin-right: 15%;
}
@media (max-width: 1024px) {
    .motivation-section, .network-section, .results-section {
        margin-left: 0;
        margin-right: 0;
    }
}

.motivation-container, .network-container, .results-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 0.5rem 0;
}
.section-image {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}
.motivation-text, .network-text, .results-text {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--text-primary);
    text-align: center;
    max-width: 900px;
}
.motivation-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 800px;
    font-size: 1.05rem;
    line-height: 1.6;
    text-align: left;
}
.bullet-tag {
    font-weight: 700;
    margin-right: 0.5rem;
}
.scope-tag { color: #00b4cc; }
.coverage-tag { color: #43b519; }
.density-tag { color: #151cf0; }
.noise-tag { color: #f03c15; }

.bibtex-box {
    background: #f1f5f9;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    font-family: 'Fira Code', 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: #0f172a;
    overflow-x: auto;
    text-align: left;
    margin: 0;
}

/* ============================================================
   Trajectory Playback Section
   ============================================================ */

.trajectory-section {
    border: 1px solid var(--border-color);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.traj-status-pill {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    background: rgba(var(--accent-blue-rgb), 0.06);
    border: 1px solid rgba(var(--accent-blue-rgb), 0.15);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-blue);
    transition: all var(--transition-speed);
}

.traj-status-pill.ready {
    background: rgba(16, 185, 129, 0.06);
    border-color: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
}

.traj-status-pill.playing {
    background: rgba(245, 158, 11, 0.06);
    border-color: rgba(245, 158, 11, 0.2);
    color: #f59e0b;
}

.traj-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.trajectory-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 1.5rem;
    align-items: stretch;
    margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
    .trajectory-layout {
        grid-template-columns: 1fr;
    }
}

.traj-controls-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.traj-slider-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.traj-slider-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.4;
}

.traj-slider-label strong {
    color: var(--accent-blue);
}

.traj-slider {
    margin-top: 0.25rem;
}

.traj-slider-endpoints {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.72rem;
    color: var(--text-secondary);
    font-weight: 600;
    margin-top: 0.25rem;
}

.traj-slider-current-label {
    font-size: 0.85rem;
    color: var(--accent-blue);
    font-weight: 700;
    background: rgba(var(--accent-blue-rgb), 0.06);
    padding: 0.15rem 0.6rem;
    border-radius: 4px;
}

.traj-playback-btns {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    justify-content: center;
}

.traj-btn {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    width: 40px !important;
    min-width: 40px;
    height: 36px;
    padding: 0 !important;
}

.traj-btn-play {
    width: 56px !important;
    min-width: 56px;
    height: 40px;
    border-radius: 8px !important;
    background: var(--accent-blue) !important;
    color: #ffffff !important;
    border-color: var(--accent-blue) !important;
}

.traj-btn-play:hover {
    background: #1d4ed8 !important;
    box-shadow: 0 0 16px rgba(var(--accent-blue-rgb), 0.35) !important;
}

.traj-speed-control, .traj-step-control {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.traj-speed-control label, .traj-step-control label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.traj-speed-select {
    padding: 0.35rem 0.8rem !important;
    font-size: 0.8rem !important;
}

.traj-step-btns {
    display: flex;
    gap: 0.35rem;
}

.traj-step-btn {
    flex: 1;
    padding: 0.35rem 0.5rem !important;
    font-size: 0.78rem !important;
    border-radius: 6px !important;
    transition: all 0.2s;
}

.traj-step-btn.active {
    background: var(--accent-blue) !important;
    color: #ffffff !important;
    border-color: var(--accent-blue) !important;
    box-shadow: 0 0 8px rgba(var(--accent-blue-rgb), 0.25);
}

.traj-info-block {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.traj-map-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.traj-map-container {
    flex: 1;
    min-height: 400px;
}

.traj-local-viewers {
    margin-top: 0.5rem;
}

.traj-viewers-grid {
    grid-template-columns: 1fr 1fr !important;
}

.traj-toggle-btn {
    font-size: 0.75rem !important;
    padding: 0.3rem 0.7rem !important;
}