/* ─── FDS Visualization Tool – Styles ─── */

:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --bg-card: #1e2a4a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a8c0;
    --text-muted: #6b7394;
    --accent: #e94560;
    --accent-hover: #ff6b81;
    --border: #2a2a4a;
    --success: #4caf50;
    --warning: #ff9800;
    --info: #2196f3;
    --mesh-color: #4488ff;
    --obst-color: #b0b0c0;
    --vent-color: #ff6b35;
    --hole-color: #00e5ff;
    --devc-color: #e040fb;

    /* Code-block palette (overridden in light theme below) */
    --code-bg:  rgba(0,0,0,.30);
    --code-fg:  #d4d4dc;
    --code-kw:  #4fc3f7;
    --code-key: #ffb86c;
    --code-str: #a5e075;
    --code-num: #f48fb1;
    --code-cmt: #6a7a8a;
    --code-line-num: #5a6378;
    --code-line-sep: rgba(255,255,255,.06);
    --code-line-hover: rgba(255,255,255,.03);
}

/* ─── Light theme ─────────────────────────── */
[data-theme="light"] {
    --bg-primary: #f4f5f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eceef3;
    --bg-card: #f9fafc;
    --text-primary: #1a1a2e;
    --text-secondary: #444a6a;
    --text-muted: #767e94;
    --accent: #d63856;
    --accent-hover: #b91d3e;
    --border: #d8dae2;

    --code-bg:  #f3f4f8;
    --code-fg:  #1a1a2e;
    --code-kw:  #0f6cb5;
    --code-key: #b85000;
    --code-str: #2a7a40;
    --code-num: #a82a5a;
    --code-cmt: #7e8696;
    --code-line-num: #a0a4ae;
    --code-line-sep: rgba(0,0,0,.08);
    --code-line-hover: rgba(0,0,0,.03);
}

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

html, body {
    height: 100%;
    overflow: hidden;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* ─── Layout ────────────────────────────── */

.app-layout {
    display: flex;
    height: calc(100vh - 30px);
    width: 100vw;
}

/* ─── Footer ────────────────────────────── */

.footer-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 100;
    gap: 16px;
}

.credit-bar {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    text-align: center;
}

.credit-bar em {
    font-style: italic;
}

.footer-credit {
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    white-space: nowrap;
}

.footer-disclaimer {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    font-style: italic;
}

/* ─── Top Bar ───────────────────────────── */

.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    z-index: 100;
    gap: 16px;
}

.top-bar .logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 16px;
    color: var(--accent);
    white-space: nowrap;
}

.top-bar .logo svg {
    width: 24px;
    height: 24px;
}

.top-bar .file-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

#filename-display {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#model-title {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.top-bar .actions {
    display: flex;
    gap: 8px;
}

/* ─── Sidebar ───────────────────────────── */

.sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    margin-top: 48px;
    height: calc(100vh - 78px); /* 48px top-bar + 30px footer */
    overflow-y: auto;
    display: none;
    flex-direction: column;
}

.sidebar.active {
    display: flex;
}

.sidebar-section {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.sidebar-section h3 {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

/* ─── Statistics ────────────────────────── */

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 12px;
}

.stat-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.stat-dot.mesh { background: var(--mesh-color); }
.stat-dot.obst { background: var(--obst-color); }
.stat-dot.vent { background: var(--vent-color); }
.stat-dot.hole { background: var(--hole-color); }
.stat-dot.devc { background: var(--devc-color); }
.stat-dot.init { background: #ff8800; }
.stat-dot.geom { background: #64c8ff; }
.stat-dot.hvac { background: #ffaa00; }
.stat-dot.zone { background: #8866ff; }
.stat-dot.slcf { background: #22dd88; }
.stat-dot.fire { background: #ff4400; }

.stat-label {
    color: var(--text-secondary);
    flex: 1;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

/* ─── Layer Controls ────────────────────── */

.layer-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.layer-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}

.layer-item:hover {
    background: var(--bg-tertiary);
}

.layer-item input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border: 2px solid var(--border);
    border-radius: 3px;
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
}

.layer-item input[type="checkbox"]:checked {
    background: var(--accent);
    border-color: var(--accent);
}

.layer-item input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    color: white;
    font-size: 11px;
    top: -1px;
    left: 2px;
}

.layer-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

/* ─── Opacity Slider ────────────────────── */

.slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

.slider-row label {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.slider-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.slider-row .slider-value {
    font-size: 11px;
    color: var(--text-muted);
    min-width: 32px;
    text-align: right;
}

/* ─── View Buttons ──────────────────────── */

.view-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
}

.view-btn {
    padding: 6px 4px;
    font-size: 11px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    text-align: center;
}

.view-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--accent);
}

/* ─── Background Options ────────────────── */

.bg-options {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.bg-option {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--border);
    transition: border-color 0.15s;
}

.bg-option:hover,
.bg-option.active {
    border-color: var(--accent);
}

/* ─── Info Panel ────────────────────────── */

#info-content {
    font-size: 12px;
}

#info-content .hint {
    color: var(--text-muted);
    font-style: italic;
}

.info-item {
    display: flex;
    gap: 8px;
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
}

.info-label {
    color: var(--text-muted);
    min-width: 70px;
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
    word-break: break-all;
}

.info-value.xb {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 11px;
}

.type-MESH { color: var(--mesh-color); font-weight: 700; }
.type-OBST { color: var(--obst-color); font-weight: 700; }
.type-VENT { color: var(--vent-color); font-weight: 700; }
.type-HOLE { color: var(--hole-color); font-weight: 700; }
.type-DEVC { color: var(--devc-color); font-weight: 700; }

/* ─── Main Viewer Area ──────────────────── */

.main-area {
    flex: 1;
    margin-top: 48px;
    position: relative;
    overflow: hidden;
}

#viewer-container {
    width: 100%;
    height: 100%;
    display: none;
}

#viewer-container canvas {
    display: block;
}

/* ─── Drop Zone ─────────────────────────── */

#drop-zone {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}

#drop-zone:hover,
#drop-zone.drag-over {
    background: rgba(233, 69, 96, 0.05);
}

.drop-content {
    text-align: center;
    max-width: 700px;
    padding: 60px;
}

.drop-content h2 {
    font-size: 36px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}

.drop-logo {
    display: inline-flex;
    align-items: center;
    gap: 16px;
}

.drop-logo svg {
    width: 48px;
    height: 48px;
    color: var(--accent);
}

.drop-content p {
    color: var(--text-muted);
    font-size: 18px;
    margin-bottom: 36px;
    line-height: 1.5;
}

.drop-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ─── Buttons ───────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 18px;
    font-weight: 500;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

/* ─── Keyboard Shortcuts Hint ───────────── */

.shortcuts {
    margin-top: 36px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.shortcut {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-muted);
}

kbd {
    display: inline-block;
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: inherit;
    font-size: 13px;
    min-width: 24px;
    text-align: center;
}

/* ─── Scrollbar ─────────────────────────── */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ─── Hidden file input ─────────────────── */
#file-input {
    display: none;
}

/* ─── Responsive ────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        width: 240px;
        min-width: 240px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ═══════════════════════════════════════════
   PAGE TABS
   ═══════════════════════════════════════════ */

.page-tabs {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.page-tab {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 11px;
    font-size: 12px;
    font-weight: 500;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
    white-space: nowrap;
}

.page-tab:hover {
    color: var(--text-primary);
    border-color: #4a4a7a;
    background: var(--bg-tertiary);
}

.page-tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 600;
}

/* ═══════════════════════════════════════════
   FIRE & COMBUSTION PANEL
   ═══════════════════════════════════════════ */

#mesh-panel,
#fire-panel {
    display: none;
    position: fixed;
    top: 48px;
    bottom: 30px;
    left: 0;
    right: 0;
    overflow-y: auto;
    background: var(--bg-primary);
    padding: 24px 32px;
    z-index: 50;
}

#mesh-panel.active,
#fire-panel.active { display: block; }

.fp-scroll {
    max-width: 1500px;
    margin: 0 auto;
}

.fp-empty {
    color: var(--text-muted);
    text-align: center;
    padding: 80px 40px;
    font-style: italic;
    font-size: 14px;
}

/* ── Overview bar ── */
.fp-overview {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 24px;
    display: flex;
    gap: 36px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    align-items: center;
}

.fp-ov-item { display: flex; flex-direction: column; gap: 4px; }
.fp-ov-lbl  { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .8px; font-weight: 600; }
.fp-ov-val  { font-size: 17px; font-weight: 700; color: var(--text-primary); }

/* ── Grids ── */
.fp-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 18px;
}

.fp-grid-uneven {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 18px;
    margin-bottom: 18px;
}

/* ── Card ── */
.fp-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px 24px;
    margin-bottom: 18px;
}

.fp-card-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: .2px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 0 14px 14px;
    margin: -4px 0 16px -14px;
    border-bottom: 1px solid var(--border);
    border-left: 4px solid var(--accent);
}

.fp-section-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: .9px;
    margin-bottom: 10px;
}

/* ── Property table ── */
.fp-prop-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.fp-prop-table td { padding: 8px 10px; border-bottom: 1px solid rgba(255,255,255,.04); line-height: 1.4; }
.fp-prop-table td:first-child { color: var(--text-muted); width: 42%; font-weight: 500; }
.fp-prop-table td:last-child  { color: var(--text-primary); font-weight: 500; }
.fp-prop-table tr:last-child td { border-bottom: none; }

/* ── Material card grid ── */
.fp-mat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 16px;
}

.fp-mat-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px 18px;
}

.fp-mat-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 12px;
}

/* ── Layer diagram ── */
.fp-layer-stack { display: flex; flex-direction: column; gap: 4px; margin: 10px 0; }

.fp-layer {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    padding: 8px 12px;
    border-radius: 5px;
    border-left: 4px solid;
}

.fp-layer-pe   { background: rgba(233,69,96,.12);   border-color: #e94560; }
.fp-layer-conc { background: rgba(176,176,192,.10);  border-color: #b0b0c0; }
.fp-layer-wood { background: rgba(210,140,60,.12);   border-color: #d28c3c; }
.fp-layer-foam { background: rgba(100,200,100,.12);  border-color: #64c864; }
.fp-layer-other{ background: rgba(68,136,255,.10);   border-color: #4488ff; }

.fp-layer-name  { font-weight: 600; flex: 1; color: var(--text-primary); }
.fp-layer-thick { color: var(--text-muted); margin-left: auto; font-family: monospace; font-size: 12px; }

/* ── Pyrolysis highlight box ── */
.fp-pyro-box {
    background: rgba(233,69,96,.08);
    border: 1px solid rgba(233,69,96,.25);
    border-radius: 6px;
    padding: 12px 14px;
    margin-top: 12px;
}

.fp-pyro-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: .9px;
    margin-bottom: 8px;
}

/* ── Fire sources table ── */
.fp-source-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.fp-source-table th {
    font-size: 11px; font-weight: 700; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: .8px;
    padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left;
}
.fp-source-table td { padding: 11px 12px; border-bottom: 1px solid rgba(255,255,255,.04); vertical-align: middle; line-height: 1.4; }
.fp-source-table tr:last-child td { border-bottom: none; }

.fp-source-main {
    display: block;
    color: var(--text-primary);
    font-weight: 600;
}

.fp-source-sub {
    display: block;
    margin-top: 2px;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 500;
}

.fp-fyi {
    margin-top: 8px;
    color: var(--text-muted);
    font-size: 12px;
    line-height: 1.45;
}

.fp-fyi span {
    display: inline-block;
    margin-right: 6px;
    padding: 1px 6px;
    border-radius: 4px;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .5px;
}

.fp-hrr-preview {
    margin-top: 18px;
}

.fp-hrr-preview .fp-note {
    margin: 0 0 12px;
}

.fp-hrr-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 12px;
}

.fp-hrr-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 12px;
}

.fp-hrr-head,
.fp-hrr-meta {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: baseline;
}

.fp-hrr-head strong {
    color: var(--vent-color);
    font-size: 13px;
}

.fp-hrr-head span,
.fp-hrr-meta {
    color: var(--text-muted);
    font-size: 11px;
}

.fp-hrr-svg {
    width: 100%;
    height: 120px;
    margin: 8px 0 6px;
    background: var(--code-bg);
    border: 1px solid var(--border);
    border-radius: 4px;
}

.fp-hrr-svg line {
    stroke: var(--code-line-sep);
    stroke-width: 1;
}

.fp-hrr-svg .fp-hrr-marker {
    stroke: rgba(255,255,255,.32);
    stroke-dasharray: 4 4;
}

.fp-hrr-svg polyline {
    fill: none;
    stroke: var(--accent);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.fp-hrr-svg text {
    fill: var(--text-muted);
    font-size: 10px;
    font-family: 'Consolas', 'Courier New', monospace;
}

.fp-hrr-svg .fp-hrr-marker-label {
    fill: var(--text-muted);
    font-weight: 400;
}

/* ── Mesh analysis ── */
.fp-mesh-card { max-width: 100%; }

.fp-mesh-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 10px;
    margin-bottom: 14px;
}

.fp-mesh-metric {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 11px 12px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    min-width: 0;
}

.fp-mesh-metric strong {
    color: var(--text-primary);
    font-size: 16px;
    overflow-wrap: anywhere;
}

.fp-note {
    color: var(--text-secondary);
    background: rgba(68,136,255,.08);
    border: 1px solid rgba(68,136,255,.22);
    border-radius: 6px;
    padding: 10px 12px;
    margin: 10px 0 14px;
    font-size: 12px;
    line-height: 1.5;
}

.fp-note code {
    font-family: 'Consolas', 'Courier New', monospace;
    color: var(--code-key);
}

.fp-note a {
    color: var(--text-primary);
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.fp-note a:hover {
    color: var(--accent-hover);
}

.fp-table-wrap {
    overflow-x: auto;
    margin-bottom: 18px;
}

.fp-mesh-table {
    min-width: 860px;
}

.fp-mesh-table td,
.fp-mesh-table th {
    white-space: nowrap;
}

.fp-mesh-parallel {
    margin: 0;
}

.fp-mesh-thresholds {
    margin: 0 0 18px;
}

.fp-bottom-note {
    margin-top: 18px;
    margin-bottom: 0;
}

/* ── Output sub-tables ── */
.fp-out-tag {
    font-family: monospace;
    font-weight: 600;
    font-size: 12px;
    white-space: nowrap;
}

.fp-devc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 8px;
}

.fp-devc-card {
    padding: 9px 12px;
    background: var(--bg-tertiary);
    border-radius: 5px;
    border-left: 3px solid #cc66ff;
    overflow: hidden;
}

.fp-devc-id {
    font-size: 13px;
    font-family: monospace;
    color: #cc66ff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 600;
}

.fp-devc-q {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

/* ── Badges ── */
.fp-badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0;
    text-transform: none;
}

/* ── FDS code disclosure ── */
.fp-code {
    margin-top: 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-tertiary);
}

.fp-code > summary {
    list-style: none;
    cursor: pointer;
    padding: 8px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    user-select: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.fp-code > summary:hover { color: var(--text-primary); }
.fp-code > summary::-webkit-details-marker { display: none; }

.fp-code > summary::before {
    content: "▶";
    font-size: 9px;
    color: var(--text-muted);
    transition: transform 0.15s;
    display: inline-block;
}

.fp-code[open] > summary::before { transform: rotate(90deg); }

.fp-code > summary > .fp-code-count {
    margin-left: auto;
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
}

.fp-code-block {
    margin: 0;
    padding: 12px 14px;
    border-top: 1px solid var(--border);
    background: var(--code-bg);
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.6;
    color: var(--code-fg);
    white-space: pre-wrap;
    word-break: break-word;
    overflow-x: auto;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
}

.fp-code-block .fp-kw,  .fp-fds-source .fp-kw   { color: var(--code-kw);  font-weight: 600; } /* &GROUP and / */
.fp-code-block .fp-key, .fp-fds-source .fp-key  { color: var(--code-key); }                    /* PARAM= */
.fp-code-block .fp-str, .fp-fds-source .fp-str  { color: var(--code-str); }                    /* 'string' */
.fp-code-block .fp-num, .fp-fds-source .fp-num  { color: var(--code-num); }                    /* numbers */
.fp-code-block .fp-cmt, .fp-fds-source .fp-cmt  { color: var(--code-cmt); font-style: italic; }/* ! comment */

/* ── FDS Code panel ── */
#fds-code-panel {
    display: none;
    position: fixed;
    top: 48px;
    bottom: 30px;
    left: 0;
    right: 0;
    overflow-y: auto;
    background: var(--bg-primary);
    padding: 24px 32px;
    z-index: 50;
}

#fds-code-panel.active { display: block; }

.fp-fds-source {
    margin: 0;
    padding: 16px 0;
    background: var(--code-bg);
    border-radius: 6px;
    border: 1px solid var(--border);
    overflow: auto;
    max-height: calc(100vh - 240px);
}

.fp-fds-source code {
    counter-reset: line;
    display: block;
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.35;
    color: var(--code-fg);
}

.fp-fds-line {
    counter-increment: line;
    display: block;
    padding: 0 16px 0 0;
    white-space: pre;
}

.fp-fds-line::before {
    content: counter(line);
    display: inline-block;
    width: 4em;
    padding-right: 14px;
    margin-right: 14px;
    text-align: right;
    color: var(--code-line-num);
    border-right: 1px solid var(--code-line-sep);
    user-select: none;
    font-size: 12px;
}

.fp-fds-line:hover { background: var(--code-line-hover); }

.fp-copy-btn {
    margin-left: auto;
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 500;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.15s;
    flex-shrink: 0;
}

.fp-copy-btn:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ── Code panel search bar ── */
.fp-code-search {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-tertiary);
}

.fp-code-search input {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 12px;
    font-family: 'Consolas', 'Courier New', monospace;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.15s;
}

.fp-code-search input:focus {
    border-color: var(--accent);
}

.fp-code-search input::placeholder {
    color: var(--text-muted);
}

.fp-search-count {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
    min-width: 60px;
    text-align: right;
}

/* Highlight / dim lines during search */
.fp-fds-line.fp-line-match {
    background: rgba(233,69,96,.12);
}

.fp-fds-line.fp-line-nomatch {
    opacity: 0.25;
}

/* ── Device group label ── */
.fp-devc-group-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .7px;
    margin: 12px 0 6px;
}

.fp-devc-group-label:first-of-type {
    margin-top: 0;
}

/* ── Mesh interface warning block ── */
.fp-mesh-iface-warn {
    margin: 0 0 18px;
    padding: 14px 16px;
    background: rgba(255,152,0,.06);
    border: 1px solid rgba(255,152,0,.3);
    border-radius: 6px;
}

.fp-badge-fire    { background: rgba(233,69,96,.2);  color: #e94560; border: 1px solid rgba(233,69,96,.4); }
.fp-badge-mat     { background: rgba(68,136,255,.2); color: #4488ff; border: 1px solid rgba(68,136,255,.4); }
.fp-badge-exp     { background: rgba(180,80,220,.2); color: #c050e0; border: 1px solid rgba(180,80,220,.3); }

/* Mesh resolution quality badges (D*/dx): red → orange → teal → green */
.fp-badge-res-bad    { background: rgba(255,51,0,.15);   color: #ff3300; border: 1px solid rgba(255,51,0,.3); }   /* Below coarse */
.fp-badge-res-coarse { background: rgba(255,140,0,.15);  color: #ff8c00; border: 1px solid rgba(255,140,0,.3); }  /* Coarse        */
.fp-badge-res-medium { background: rgba(0,180,180,.15);  color: #00b4b4; border: 1px solid rgba(0,180,180,.3); }  /* Medium        */
.fp-badge-res-fine   { background: rgba(76,175,80,.15);  color: #4caf50; border: 1px solid rgba(76,175,80,.3); }  /* Fine          */