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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0f1117;
    color: #e0e0e0;
    min-height: 100vh;
}

header {
    background: #1a1d27;
    padding: 16px 24px;
    border-bottom: 1px solid #2a2d3a;
    display: flex;
    align-items: center;
    gap: 16px;
}

header h1 {
    font-size: 1.5rem;
    color: #60a5fa;
    font-weight: 700;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-logo {
    width: 28px;
    height: 28px;
}

header .subtitle {
    font-size: 0.85rem;
    color: #888;
    white-space: nowrap;
}

.panel {
    background: #1a1d27;
    border: 1px solid #2a2d3a;
    border-radius: 8px;
    padding: 20px;
    margin: 16px;
}

.hidden {
    display: none !important;
}

/* Upload Section */
#upload-section {
    max-width: 700px;
    margin: 24px auto;
}

#upload-section h2 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: #60a5fa;
}

.file-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.file-input label {
    display: block;
    font-size: 0.85rem;
    color: #aaa;
    margin-bottom: 6px;
}

.file-input input[type="file"] {
    width: 100%;
    padding: 10px;
    background: #252836;
    border: 1px solid #3a3d4a;
    border-radius: 6px;
    color: #e0e0e0;
    cursor: pointer;
}

.file-input input[type="file"]:hover {
    border-color: #60a5fa;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: #aaa;
    cursor: pointer;
}

#analyze-btn {
    padding: 10px 32px;
    background: #60a5fa;
    color: #0f1117;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

#analyze-btn:hover {
    background: #3b82f6;
}

#analyze-btn:disabled {
    background: #3a3d4a;
    cursor: not-allowed;
}

/* Status Bar */
#status-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 16px;
    padding: 12px;
    background: #252836;
    border-radius: 6px;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid #3a3d4a;
    border-top: 2px solid #60a5fa;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Summary Bar */
.summary {
    display: flex;
    justify-content: space-around;
    gap: 16px;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #60a5fa;
}

.stat-label {
    font-size: 0.75rem;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Viewer Area */
#viewer-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 16px;
}

.viewer-panel {
    background: #1a1d27;
    border: 1px solid #2a2d3a;
    border-radius: 8px;
    overflow: hidden;
}

.viewer-panel h3 {
    padding: 10px 16px;
    font-size: 0.85rem;
    color: #888;
    border-bottom: 1px solid #2a2d3a;
}

#three-canvas {
    width: 100%;
    height: 450px;
    display: block;
}

#pdf-container {
    position: relative;
    width: 100%;
    height: 450px;
    overflow: auto;
    background: #252836;
}

#pdf-canvas {
    display: block;
    max-width: 100%;
}

#annotation-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

#annotation-overlay rect {
    pointer-events: all;
    cursor: pointer;
}

/* Matches Table */
#matches-panel {
    margin: 16px;
}

#matches-panel h3 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: #60a5fa;
}

#matches-table {
    width: 100%;
    border-collapse: collapse;
}

#matches-table th {
    text-align: left;
    padding: 8px 12px;
    font-size: 0.75rem;
    color: #888;
    text-transform: uppercase;
    border-bottom: 1px solid #2a2d3a;
}

#matches-table td {
    padding: 10px 12px;
    font-size: 0.85rem;
    border-bottom: 1px solid #1f2230;
}

#matches-table tr {
    cursor: pointer;
    transition: background 0.15s;
}

#matches-table tr:hover {
    background: #252836;
}

#matches-table tr.selected {
    background: #1e3a5f;
}

/* Confidence colors */
.confidence-high { color: #4ade80; }
.confidence-mid  { color: #facc15; }
.confidence-low  { color: #f87171; }

/* Match color dot */
.match-color-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 4px;
    vertical-align: middle;
}

/* Annotation highlights */
.annotation-rect {
    transition: all 0.2s;
}

.annotation-rect:hover,
.annotation-rect.active {
    stroke-width: 3 !important;
    filter: brightness(1.3);
}

/* Header Nav */
.header-nav {
    margin-left: auto;
    display: flex;
    gap: 4px;
}

.nav-btn {
    padding: 6px 16px;
    background: transparent;
    color: #888;
    border: 1px solid #2a2d3a;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn:hover {
    color: #e0e0e0;
    border-color: #60a5fa;
}

.nav-btn.active {
    background: #60a5fa;
    color: #0f1117;
    border-color: #60a5fa;
    font-weight: 600;
}

/* Evaluation Section */
#evaluation-section .panel {
    max-width: 1000px;
    margin: 24px auto;
}

.eval-desc {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 16px;
}

.eval-btn-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.eval-group-label {
    font-size: 0.75rem;
    color: #666;
    margin-right: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.eval-mode-btn, .eval-filter-btn, .pres-filter-btn, .tc-filter-btn {
    padding: 6px 16px;
    background: #252836;
    color: #aaa;
    border: 1px solid #3a3d4a;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.eval-mode-btn.active {
    background: #60a5fa;
    color: #0f1117;
    border-color: #60a5fa;
    font-weight: 600;
}

.eval-filter-btn.active, .pres-filter-btn.active, .tc-filter-btn.active {
    background: #22c55e;
    color: #0f1117;
    border-color: #22c55e;
    font-weight: 600;
}

#eval-charts img, .eval-gallery img {
    width: 100%;
    max-width: 800px;
    display: block;
    margin: 16px auto;
    border-radius: 8px;
    cursor: zoom-in;
    transition: transform 0.2s, box-shadow 0.2s;
}

#eval-charts img:hover, .eval-gallery img:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 20px rgba(96, 165, 250, 0.2);
}

/* Lightbox */
.lightbox-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.88);
    z-index: 1000;
    cursor: zoom-out;
    justify-content: center;
    align-items: center;
}

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

.lightbox-overlay img {
    max-width: 92vw;
    max-height: 90vh;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.eval-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

.eval-gallery img {
    margin: 0;
}

#eval-table-container table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

#eval-table-container th {
    text-align: left;
    padding: 8px 12px;
    font-size: 0.75rem;
    color: #888;
    text-transform: uppercase;
    border-bottom: 1px solid #2a2d3a;
}

#eval-table-container td {
    padding: 8px 12px;
    font-size: 0.85rem;
    border-bottom: 1px solid #1f2230;
}

/* Test Cases Section */
#testcases-section > .panel {
    max-width: 1000px;
    margin: 24px auto;
}

#tc-table-container table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
}

#tc-table-container th {
    text-align: left;
    padding: 8px 12px;
    font-size: 0.75rem;
    color: #888;
    text-transform: uppercase;
    border-bottom: 1px solid #2a2d3a;
}

#tc-table-container td {
    padding: 8px 12px;
    font-size: 0.85rem;
    border-bottom: 1px solid #1f2230;
}

#tc-table-container tr.tc-row:hover {
    background: #252836;
    cursor: pointer;
}

#tc-viewer-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 16px;
}

#tc-three-canvas {
    width: 100%;
    height: 450px;
    display: block;
}

/* PDF Page Navigation */
.pdf-page-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 6px 0;
    background: #1a1d2a;
    border-radius: 6px;
    margin-bottom: 6px;
}
.pdf-page-nav button {
    background: #2a2d3a;
    color: #60a5fa;
    border: 1px solid #3a3d4a;
    border-radius: 4px;
    padding: 4px 12px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s;
}
.pdf-page-nav button:hover:not(:disabled) {
    background: #3a3d4a;
}
.pdf-page-nav button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}
.pdf-page-info {
    color: #888;
    font-size: 0.8rem;
    min-width: 80px;
    text-align: center;
}

#tc-pdf-container {
    position: relative;
    width: 100%;
    height: 450px;
    overflow: auto;
    background: #252836;
}

#tc-pdf-canvas {
    display: block;
    max-width: 100%;
}

#tc-detail-metrics {
    max-width: 1000px;
    margin: 16px auto;
}

#tc-detail-metrics table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
}

#tc-detail-metrics th {
    text-align: left;
    padding: 8px 12px;
    font-size: 0.75rem;
    color: #888;
    text-transform: uppercase;
    border-bottom: 1px solid #2a2d3a;
}

#tc-detail-metrics td {
    padding: 8px 12px;
    font-size: 0.85rem;
    border-bottom: 1px solid #1f2230;
}

.eval-tc-link {
    color: #60a5fa;
    text-decoration: none;
    cursor: pointer;
}

.eval-tc-link:hover {
    text-decoration: underline;
}

/* Category tags */
.category-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.category-tag.ctc { background: #1e3a5f; color: #60a5fa; }
.category-tag.ftc { background: #1a3d2a; color: #4ade80; }
.category-tag.syn { background: #3d2a1a; color: #fb923c; }

/* Score bar cell */
.score-bar {
    display: inline-block;
    height: 6px;
    border-radius: 3px;
    vertical-align: middle;
    margin-right: 6px;
}

/* Detail back button */
.back-btn {
    padding: 6px 16px;
    background: #252836;
    color: #aaa;
    border: 1px solid #3a3d4a;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}
.back-btn:hover {
    color: #e0e0e0;
    border-color: #60a5fa;
}

/* Eval table average row */
#eval-table-container tr.avg-row {
    background: #1a2030;
    font-weight: 600;
}
#eval-table-container tr.avg-row td {
    border-top: 2px solid #3a3d4a;
}

/* Responsive */
@media (max-width: 900px) {
    #viewer-area,
    #tc-viewer-area {
        grid-template-columns: 1fr;
    }
    .file-inputs {
        grid-template-columns: 1fr;
    }
    header {
        flex-wrap: wrap;
    }
    .header-nav {
        margin-left: 0;
        width: 100%;
        overflow-x: auto;
    }
    .eval-gallery {
        grid-template-columns: 1fr;
    }
}