/* ═══════════════════════════════════════════════════════════
   Balloon Strain Lab — Clean dark theme
   ═══════════════════════════════════════════════════════════ */

:root {
    --bg-0: #080d18;
    --bg-1: #0c1220;
    --bg-2: #111827;
    --bg-3: #1e2d45;
    --text-0: #f1f5f9;
    --text-1: #cbd5e1;
    --text-2: #94a3b8;
    --text-3: #64748b;
    --accent: #38bdf8;
    --accent2: #a78bfa;
    --green: #34d399;
    --red: #f87171;
    --yellow: #fbbf24;
    --border: #1e293b;
    --radius: 8px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

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

html { font-size: 14px; }
body {
    font-family: var(--font);
    background: var(--bg-0);
    color: var(--text-1);
    line-height: 1.5;
    min-height: 100vh;
}

.hidden { display: none !important; }
.muted { color: var(--text-3); }

/* ── Header ──────────────────────────────────────────────── */
#site-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 20px;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-left h1 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-0);
    white-space: nowrap;
}
.header-center { flex: 1; display: flex; justify-content: center; }
.header-center select {
    width: 100%;
    max-width: 400px;
    padding: 6px 12px;
    background: var(--bg-2);
    color: var(--text-0);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
}
.header-right { white-space: nowrap; font-size: 0.85rem; }

/* ── Welcome ─────────────────────────────────────────────── */
#welcome-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 60vh;
    text-align: center;
    padding: 40px 20px;
    gap: 32px;
}
.welcome-content h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--text-0); }
.welcome-content p { color: var(--text-2); max-width: 500px; margin: 0 auto; }
.welcome-stats {
    display: flex;
    gap: 32px;
    justify-content: center;
    margin-top: 24px;
}
.stat-box { text-align: center; }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 0.8rem; color: var(--text-3); text-transform: uppercase; }

/* ── Comparison Table ────────────────────────────────────── */
#comparison-table {
    width: 100%;
}
.comp-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    text-align: center;
}
.comp-table thead th {
    padding: 8px 12px;
    background: var(--bg-2);
    border-bottom: 2px solid var(--border);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-2);
    white-space: nowrap;
}
.comp-corner {
    width: 1%;
}
.comp-col-header {
    vertical-align: bottom;
}
.comp-unit {
    font-size: 0.68rem;
    font-weight: 400;
    color: var(--text-3);
}
.comp-row {
    cursor: pointer;
    transition: background 0.15s;
    border-bottom: 1px solid var(--border);
}
.comp-row:last-child {
    border-bottom: none;
}
.comp-row:hover {
    background: var(--bg-3);
}
.comp-balloon-cell {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    text-align: left;
    white-space: nowrap;
}
.comp-thumb {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--border);
    flex-shrink: 0;
}
.comp-index {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-3);
    flex-shrink: 0;
}
.comp-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
}
.comp-value {
    padding: 8px 12px;
    font-family: var(--mono);
    font-size: 0.82rem;
    color: var(--text-0);
    white-space: nowrap;
}

/* ── Detail Header ───────────────────────────────────────── */
.detail-header {
    padding: 16px 20px 8px;
}
.detail-header h2 { font-size: 1.3rem; color: var(--text-0); }
.detail-meta { font-size: 0.85rem; color: var(--text-3); margin-top: 2px; }

/* ── Photo Gallery ───────────────────────────────────────── */
.photo-gallery {
    display: flex;
    gap: 12px;
    padding: 12px 20px;
    overflow-x: auto;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border);
}
.photo-gallery figure {
    flex: 0 0 auto;
    margin: 0;
    text-align: center;
}
.photo-gallery img {
    height: 120px;
    width: auto;
    border-radius: 6px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: transform 0.15s;
}
.photo-gallery img:hover {
    transform: scale(1.05);
    border-color: var(--accent);
}
.photo-gallery figcaption {
    font-size: 0.7rem;
    color: var(--text-3);
    margin-top: 4px;
    max-width: 160px;
}

/* ═══ FIELD VIEWER ═══════════════════════════════════════════ */
.field-section {
    margin: 0 12px 12px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.field-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 14px;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    font-size: 0.82rem;
    flex-wrap: wrap;
}
.field-controls label {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--text-2);
    white-space: nowrap;
}
.field-controls select,
.field-controls input[type="number"] {
    background: var(--bg-1);
    color: var(--text-0);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.82rem;
}
.field-readout {
    margin-left: auto;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-2);
}

/* ── Info Cards (live readouts) ──────────────────────────── */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1px;
    background: var(--border);
    border-bottom: 1px solid var(--border);
}
.info-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 8px 6px 6px;
    background: var(--bg-1);
    text-align: center;
    min-width: 0;
}
.info-label {
    font-size: 0.65rem;
    color: var(--text-3);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1.2;
    white-space: nowrap;
}
.info-value {
    font-family: var(--mono);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-0);
    line-height: 1.3;
    white-space: nowrap;
}
.info-unit {
    font-size: 0.65rem;
    color: var(--text-3);
    line-height: 1;
}

@media (max-width: 800px) {
    .info-cards { grid-template-columns: repeat(4, 1fr); }
    .info-value { font-size: 0.95rem; }
}

#field-container {
    position: relative;
    width: 100%;
    aspect-ratio: 1280 / 800;
    max-height: 65vh;
    background: #000;
    overflow: hidden;
}

.field-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: contain;
    z-index: 1;
    pointer-events: none;
}
.field-bg.hidden-photo { opacity: 0; }

#field-canvas {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 2;
    cursor: crosshair;
}

/* Colorbar */
.colorbar {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(12, 18, 32, 0.85);
    border-radius: 6px;
    padding: 6px 4px;
}
.cb-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text-2);
    white-space: nowrap;
}
.cb-high { order: -1; margin-bottom: 2px; }
.cb-mid { position: absolute; top: 50%; transform: translateY(-50%); left: 30px; }
.cb-low { margin-top: 2px; }

/* Hover tooltip */
.hover-tip {
    position: absolute;
    z-index: 20;
    background: rgba(12, 18, 32, 0.92);
    border: 1px solid var(--accent);
    border-radius: 6px;
    padding: 6px 10px;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-0);
    pointer-events: none;
    white-space: nowrap;
}

/* ── Timeline ────────────────────────────────────────────── */
.timeline-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: var(--bg-2);
    border-top: 1px solid var(--border);
}
.tl-btn {
    background: var(--bg-1);
    border: 1px solid var(--border);
    color: var(--text-1);
    border-radius: 4px;
    padding: 4px 10px;
    cursor: pointer;
    font-size: 0.85rem;
}
.tl-btn:hover { background: var(--bg-3); }
.timeline-bar input[type="range"] {
    flex: 1;
    accent-color: var(--accent);
}
.tl-readout {
    display: flex;
    gap: 16px;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-2);
    white-space: nowrap;
}

/* ═══ CHARTS ═════════════════════════════════════════════════ */
.charts-section {
    margin: 0 12px 12px;
}
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
.chart-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
}
.chart-card h3 {
    font-size: 0.85rem;
    color: var(--text-2);
    margin-bottom: 8px;
    font-weight: 500;
}
.chart-card-wide {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    margin-bottom: 12px;
}
.chart-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
}
.chart-card-header h3 {
    font-size: 0.9rem;
    color: var(--text-0);
    font-weight: 600;
    margin: 0;
}
.chart-card-header .muted {
    font-size: 0.78rem;
}
.chart-card-header .tl-btn {
    margin-left: auto;
    padding: 2px 8px;
    font-size: 0.78rem;
}
.plot-container {
    width: 100%;
    height: 280px;
}

/* ── Fullscreen chart cards ── */
.chart-card:fullscreen,
.chart-card-wide:fullscreen {
    display: flex;
    flex-direction: column;
    background: var(--bg-0);
    padding: 24px;
    border: none;
    border-radius: 0;
}
.chart-card:fullscreen .plot-container,
.chart-card-wide:fullscreen .plot-container {
    flex: 1;
    height: 100% !important;
}
.chart-card:fullscreen h3 {
    color: var(--text-0);
    font-size: 1.1rem;
    margin-bottom: 12px;
}

/* Plotly modebar styling to match dark theme */
.modebar { opacity: 0; transition: opacity 0.2s; }
.chart-card:hover .modebar,
.chart-card-wide:hover .modebar { opacity: 1; }
.modebar-btn path { fill: var(--text-3) !important; }
.modebar-btn:hover path { fill: var(--accent) !important; }
.modebar-btn.active path { fill: var(--accent) !important; }

/* ═══ POINT DETAIL ═══════════════════════════════════════════ */
.point-section {
    margin: 0 12px 12px;
    background: var(--bg-1);
    border: 1px solid var(--yellow);
    border-radius: var(--radius);
    padding: 12px;
}
.point-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}
.point-header h3 { font-size: 1rem; color: var(--yellow); }

/* ═══ DETAILS / DATA ═════════════════════════════════════════ */
.details-section {
    margin: 0 12px 24px;
}
.collapse-btn {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-2);
    padding: 10px 16px;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-size: 0.85rem;
}
.collapse-btn:hover { background: var(--bg-3); }
.details-body {
    margin-top: 8px;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px;
    margin-bottom: 12px;
}
.card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
}
.card h3 {
    font-size: 0.85rem;
    color: var(--text-2);
    margin-bottom: 8px;
    font-weight: 500;
}

.kv-table { width: 100%; border-collapse: collapse; }
.kv-table td { padding: 3px 0; font-size: 0.82rem; }
.kv-table td:first-child { color: var(--text-3); width: 40%; }
.kv-table td:last-child { color: var(--text-0); font-family: var(--mono); }

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
}
.data-table th {
    padding: 6px 8px;
    text-align: left;
    background: var(--bg-2);
    color: var(--text-2);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    font-size: 0.75rem;
}
.data-table td {
    padding: 4px 8px;
    border-bottom: 1px solid var(--border);
}
.data-table .numeric { font-family: var(--mono); text-align: right; }

.download-links { display: flex; flex-direction: column; gap: 8px; }
.download-links a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.85rem;
}
.download-links a:hover { text-decoration: underline; }

/* ── Help tooltips ───────────────────────────────────────── */
.help-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-3);
    color: var(--text-3);
    font-size: 0.65rem;
    font-weight: 700;
    cursor: help;
    position: relative;
    vertical-align: middle;
    margin-left: 4px;
    flex-shrink: 0;
    font-style: normal;
    line-height: 1;
}
.help-icon:hover {
    background: var(--accent);
    color: var(--bg-0);
}
.help-icon .help-text {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-2);
    border: 1px solid var(--accent);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.78rem;
    font-weight: 400;
    font-style: normal;
    color: var(--text-1);
    white-space: normal;
    width: 280px;
    line-height: 1.5;
    z-index: 200;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
    pointer-events: none;
}
.help-icon .help-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--accent);
}
.help-icon:hover .help-text {
    display: block;
}
/* For tooltips near the left edge, shift right */
.help-icon.help-right .help-text {
    left: 0;
    transform: none;
}
.help-icon.help-right .help-text::after {
    left: 8px;
    transform: none;
}

/* Metric select — enhanced option styling */
.field-controls select option {
    padding: 4px 8px;
}

/* Abbr-style dotted underline hints */
abbr[title], .jargon[title] {
    text-decoration: underline dotted var(--text-3);
    text-underline-offset: 2px;
    cursor: help;
}

/* ── Profile Slices ──────────────────────────────────────── */
.profile-section {
    padding: 0 16px 16px;
}
.profile-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
    padding: 8px 12px;
    background: var(--bg-2);
    border-radius: var(--radius) var(--radius) 0 0;
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-2);
}
.profile-controls label {
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.profile-controls input[type="range"] {
    accent-color: var(--accent);
    cursor: pointer;
}
.profile-controls .muted {
    font-family: var(--mono);
    font-size: 0.75rem;
    min-width: 60px;
}
#profile-container {
    background: var(--bg-1);
    border-radius: 0 0 var(--radius) var(--radius);
    overflow: hidden;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 800px) {
    .chart-grid { grid-template-columns: 1fr; }
    .field-controls { font-size: 0.75rem; gap: 8px; }
    .tl-readout { gap: 8px; font-size: 0.7rem; }
}