/* ═══════════════════════════════════════════════════════════════════════════
   Biopesticide-AI — Custom Web UI
   Design language: modern agritech (verteal-inspired)
   Palette: forest green, sage, cream, charcoal
   Typography: Fraunces (serif headlines) + Inter (body) + JetBrains Mono
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
    /* Colors */
    --c-forest: #1a3c34;
    --c-forest-light: #2d5a4a;
    --c-sage: #7fb069;
    --c-sage-light: #a8d5ba;
    --c-sage-pale: #e8f5ec;
    --c-cream: #faf8f3;
    --c-warm-white: #fefdfa;
    --c-charcoal: #1a1a1a;
    --c-text: #2d2d2d;
    --c-muted: #6b7280;
    --c-border: #e5e7eb;
    --c-border-dark: #d1d5db;
    --c-surface: #ffffff;
    --c-accent: #2f86b2;
    --c-accent-warm: #ba5a6a;
    --c-success: #449f63;
    --c-warning: #b69045;
    --c-error: #964039;

    /* Typography */
    --font-serif: 'Fraunces', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 40px;
    --space-2xl: 64px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
    --shadow-green: 0 8px 24px rgba(26, 60, 52, 0.12);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.6;
    color: var(--c-text);
    background: var(--c-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 var(--space-lg); }

/* ─── Header ─── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 248, 243, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border);
}
.header-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 14px var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--c-forest);
}
.logo-mark {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-forest) 0%, var(--c-sage) 100%);
    position: relative;
}
.logo-mark::after {
    content: '';
    position: absolute;
    top: 6px; left: 6px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--c-cream);
}
.logo-text {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.3px;
}
.logo-accent { color: var(--c-sage); }

.header-nav {
    display: flex;
    gap: var(--space-lg);
}
.header-nav a {
    color: var(--c-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}
.header-nav a:hover { color: var(--c-forest); }

.header-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--c-muted);
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--c-warning);
    transition: background 0.3s;
}
.status-dot.active { background: var(--c-success); }
.status-dot.degraded { background: var(--c-warning); }
.status-dot.error { background: var(--c-error); }

/* ─── Hero ─── */
.hero {
    position: relative;
    padding: var(--space-2xl) 0 var(--space-xl);
    text-align: center;
    overflow: hidden;
}
.hero-inner {
    position: relative;
    z-index: 2;
    max-width: 760px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--c-sage-pale);
    border: 1px solid var(--c-sage-light);
    font-size: 12px;
    font-weight: 500;
    color: var(--c-forest);
    margin-bottom: var(--space-lg);
}
.hero-badge-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--c-sage);
}
.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -1.5px;
    color: var(--c-forest);
    margin-bottom: var(--space-lg);
}
.hero-title-accent {
    font-style: italic;
    color: var(--c-sage);
    font-weight: 600;
}
.hero-subtitle {
    font-size: 17px;
    line-height: 1.65;
    color: var(--c-muted);
    max-width: 620px;
    margin: 0 auto var(--space-xl);
}
.hero-metrics {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    flex-wrap: wrap;
}
.hero-metric { text-align: center; }
.hero-metric-num {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 700;
    color: var(--c-forest);
    line-height: 1;
}
.hero-metric-lbl {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--c-muted);
    margin-top: 4px;
}
.hero-metric-sep {
    width: 1px;
    height: 36px;
    background: var(--c-border-dark);
}

/* Hero background pattern (subtle leaf-like organic shapes) */
.hero-bg-pattern {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        radial-gradient(ellipse 400px 200px at 10% 20%, rgba(127, 176, 105, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 300px 300px at 90% 80%, rgba(26, 60, 52, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse 200px 200px at 50% 50%, rgba(168, 213, 186, 0.05) 0%, transparent 50%);
    z-index: 1;
}

/* ─── Design Section ─── */
.design-section {
    padding: var(--space-xl) 0;
}
.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}
.section-title {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.5px;
}
.section-subtitle {
    font-size: 15px;
    color: var(--c-muted);
    max-width: 560px;
    margin: 0 auto;
}

.input-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
}
.pest-input {
    width: 100%;
    border: none;
    outline: none;
    resize: vertical;
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.6;
    color: var(--c-text);
    background: transparent;
    min-height: 80px;
}
.pest-input::placeholder { color: var(--c-muted); opacity: 0.7; }

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: var(--space-lg);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--c-border);
    flex-wrap: wrap;
}
.examples {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.examples-label {
    font-size: 12px;
    color: var(--c-muted);
    font-weight: 500;
    margin-right: 4px;
}
.example-chip {
    padding: 5px 12px;
    border: 1px solid var(--c-border-dark);
    border-radius: 16px;
    background: var(--c-cream);
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
    color: var(--c-forest-light);
    cursor: pointer;
    transition: all 0.2s;
}
.example-chip:hover {
    background: var(--c-sage-pale);
    border-color: var(--c-sage);
    color: var(--c-forest);
}

.input-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}
.topk-control {
    display: flex;
    align-items: center;
    gap: 8px;
}
.topk-label {
    font-size: 12px;
    color: var(--c-muted);
    font-weight: 500;
}
.topk-input {
    width: 56px;
    padding: 6px 8px;
    border: 1px solid var(--c-border-dark);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 13px;
    text-align: center;
    color: var(--c-text);
    background: var(--c-surface);
}
.topk-input:focus {
    outline: none;
    border-color: var(--c-sage);
    box-shadow: 0 0 0 3px rgba(127, 176, 105, 0.15);
}

.design-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--c-forest);
    color: white;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-green);
}
.design-btn:hover {
    background: var(--c-forest-light);
    transform: translateY(-1px);
    box-shadow: 0 10px 28px rgba(26, 60, 52, 0.18);
}
.design-btn:active { transform: translateY(0); }
.design-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}
.design-btn-arrow { transition: transform 0.2s; }
.design-btn:hover .design-btn-arrow { transform: translateX(3px); }

/* ─── Loading State ─── */
.loading-state {
    text-align: center;
    padding: var(--space-2xl) 0;
}
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--c-border);
    border-top-color: var(--c-sage);
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: 4px;
}
.loading-subtext {
    font-size: 13px;
    color: var(--c-muted);
}

/* ─── Error State ─── */
.error-state {
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
}
.error-text {
    color: var(--c-error);
    font-size: 14px;
    white-space: pre-wrap;
    font-family: var(--font-mono);
}

/* ─── Results Section ─── */
.results-section {
    padding: var(--space-xl) 0;
    background: var(--c-warm-white);
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}

/* Stats strip */
.stats-strip {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--c-border);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}
.stats-strip .stat {
    text-align: center;
}
.stats-strip .stat-num {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    color: var(--c-sage);
    line-height: 1;
}
.stats-strip .stat-lbl {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--c-muted);
    margin-top: 4px;
}

/* Result blocks */
.result-block { margin-bottom: var(--space-xl); }
.block-title {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: var(--space-md);
    letter-spacing: -0.3px;
}

/* Pest report card */
.pest-report-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-left: 4px solid var(--c-sage);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}
.pest-report-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}
.pest-report-table td {
    padding: 6px 0;
}
.pest-report-table td:first-child {
    color: var(--c-muted);
    font-weight: 500;
    width: 140px;
}
.pest-report-table td:last-child {
    color: var(--c-text);
}
.pest-report-table b { color: var(--c-forest); }

/* Candidate cards */
.candidates-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-sm);
}
.candidate-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-left: 4px solid var(--c-sage);
    border-radius: var(--radius-md);
    padding: 14px var(--space-lg);
    transition: all 0.2s;
}
.candidate-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(2px);
}
.candidate-card.rank-good { border-left-color: var(--c-success); }
.candidate-card.rank-warn { border-left-color: var(--c-warning); }
.candidate-card.rank-poor { border-left-color: var(--c-error); }

.candidate-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}
.candidate-rank {
    font-family: var(--font-sans);
    font-size: 11px;
    font-weight: 700;
    color: var(--c-sage);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.candidate-seq {
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 600;
    color: var(--c-text);
    letter-spacing: 0.5px;
}
.candidate-metrics {
    display: flex;
    gap: var(--space-lg);
    font-size: 12px;
    color: var(--c-muted);
    flex-wrap: wrap;
}
.candidate-metrics .metric-val {
    font-weight: 700;
    color: var(--c-text);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--c-border);
    margin-bottom: var(--space-lg);
}
.tab {
    padding: 10px 20px;
    border: none;
    background: none;
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    color: var(--c-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.2s;
}
.tab:hover { color: var(--c-forest); }
.tab.active {
    color: var(--c-forest);
    border-bottom-color: var(--c-sage);
    font-weight: 600;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Charts */
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}
.chart-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}
.chart-card-wide { grid-column: 1 / -1; }
.chart-title {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: var(--space-md);
}
.chart-container {
    position: relative;
    height: 240px;
}
.chart-card-wide .chart-container { height: 320px; }

/* Safety cards */
.safety-cards-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}
.safety-card-item {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}
.safety-card-item h4 {
    font-family: var(--font-mono);
    font-size: 14px;
    color: var(--c-forest);
    margin-bottom: var(--space-sm);
}
.safety-card-item pre {
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.6;
    color: var(--c-text);
    white-space: pre-wrap;
}

/* Regulatory memo */
.regulatory-memo-content {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    font-size: 14px;
    line-height: 1.7;
    color: var(--c-text);
}
.regulatory-memo-content h1,
.regulatory-memo-content h2,
.regulatory-memo-content h3 {
    font-family: var(--font-serif);
    color: var(--c-forest);
    margin: var(--space-md) 0 var(--space-sm);
}
.regulatory-memo-content h1 { font-size: 20px; }
.regulatory-memo-content h2 { font-size: 16px; }
.regulatory-memo-content h3 { font-size: 14px; }
.regulatory-memo-content p { margin-bottom: var(--space-sm); }
.regulatory-memo-content strong { color: var(--c-forest); }
.regulatory-memo-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-sm) 0;
    font-size: 13px;
}
.regulatory-memo-content th,
.regulatory-memo-content td {
    border: 1px solid var(--c-border);
    padding: 6px 10px;
    text-align: left;
}
.regulatory-memo-content th {
    background: var(--c-sage-pale);
    font-weight: 600;
}

/* Export */
.export-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}
.export-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
}
.export-title {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: 8px;
}
.export-desc {
    font-size: 13px;
    color: var(--c-muted);
    margin-bottom: var(--space-md);
}
.export-btn {
    padding: 10px 20px;
    border: 1px solid var(--c-forest);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--c-forest);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}
.export-btn:hover {
    background: var(--c-forest);
    color: white;
}

/* ─── About / Pipeline ─── */
.about-section {
    padding: var(--space-2xl) 0;
    background: var(--c-cream);
}
.about-section .section-title {
    text-align: center;
    margin-bottom: var(--space-xl);
}
.pipeline-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}
.pipeline-step {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    transition: all 0.2s;
}
.pipeline-step:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.pipeline-num {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 700;
    color: var(--c-sage);
    line-height: 1;
    margin-bottom: var(--space-sm);
}
.pipeline-step h4 {
    font-family: var(--font-serif);
    font-size: 17px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: 6px;
}
.pipeline-step p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--c-muted);
}

/* ─── Footer ─── */
.site-footer {
    padding: var(--space-xl) 0;
    text-align: center;
    border-top: 1px solid var(--c-border);
    background: var(--c-cream);
}
.site-footer p {
    font-size: 12px;
    color: var(--c-muted);
}

/* ─── Pest selector grid ─── */
.pest-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}
.pest-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    font-family: var(--font-sans);
    position: relative;
    overflow: hidden;
}
.pest-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--c-sage);
    opacity: 0;
    transition: opacity 0.2s;
}
.pest-card:hover {
    border-color: var(--c-sage);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.pest-card:hover::before { opacity: 1; }
.pest-card:active { transform: translateY(0); }
.pest-card.selected {
    border-color: var(--c-sage);
    box-shadow: 0 0 0 2px var(--c-sage), var(--shadow-md);
}
.pest-card.selected::before { opacity: 1; }

.pest-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    font-weight: 700;
}
/* Crop-colored icons */
.pest-icon-rice { background: linear-gradient(135deg, #d4a574 0%, #b8860b 100%); }
.pest-icon-maize { background: linear-gradient(135deg, #f4d03f 0%, #d4ac0d 100%); }
.pest-icon-wheat { background: linear-gradient(135deg, #daa520 0%, #b8860b 100%); }
.pest-icon-veg { background: linear-gradient(135deg, #7fb069 0%, #5d8a4a 100%); }
.pest-icon-potato { background: linear-gradient(135deg, #c9a87c 0%, #a0825a 100%); }
.pest-icon-tomato { background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%); }
.pest-icon-custom {
    background: linear-gradient(135deg, var(--c-forest) 0%, var(--c-sage) 100%);
    font-size: 24px;
}

.pest-card-body { flex: 1; min-width: 0; }
.pest-card-name {
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: 2px;
    line-height: 1.3;
}
.pest-card-latin {
    font-family: var(--font-serif);
    font-size: 12px;
    font-style: italic;
    color: var(--c-muted);
    margin-bottom: 6px;
}
.pest-card-crop {
    display: inline-block;
    padding: 2px 8px;
    background: var(--c-sage-pale);
    color: var(--c-forest);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 10px;
}
.pest-card-custom {
    border-style: dashed;
    border-color: var(--c-border-dark);
    background: var(--c-cream);
}
.pest-card-custom:hover { border-color: var(--c-sage); }

/* Card-mode top-K control */
.card-mode-controls {
    display: flex;
    justify-content: center;
    margin-bottom: var(--space-lg);
}
.card-mode-controls .topk-control {
    background: var(--c-surface);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--c-border);
}

/* ─── Chart containers (FIX: must have explicit height) ─── */
.chart-container {
    position: relative;
    height: 280px;
    width: 100%;
}
.chart-container-tall {
    height: 400px;
}
.heatmap-scroll {
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
}

/* ─── Wet-lab simulation ─── */
.sim-intro {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    text-align: center;
}
.sim-title {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: 8px;
}
.sim-desc {
    font-size: 13px;
    color: var(--c-muted);
    margin-bottom: var(--space-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.sim-btn { margin: 0 auto; }

.sim-results { margin-top: var(--space-lg); }

.sim-summary-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}
.sim-card-title {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 600;
    color: var(--c-forest);
    margin-bottom: var(--space-sm);
}
.sim-meta {
    font-size: 12px;
    color: var(--c-muted);
    margin-bottom: var(--space-md);
}

.sim-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}
.sim-table th,
.sim-table td {
    border: 1px solid var(--c-border);
    padding: 8px 10px;
    text-align: center;
}
.sim-table th {
    background: var(--c-sage-pale);
    color: var(--c-forest);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.sim-table .sim-seq {
    font-family: var(--font-mono);
    font-size: 11px;
}
.sim-table .sim-val { color: var(--c-muted); }
.sim-table .sim-val-good { font-weight: 700; color: var(--c-forest); }
.tier-good { color: var(--c-success); font-weight: 600; }
.tier-warn { color: var(--c-warning); font-weight: 600; }
.tier-poor { color: var(--c-error); font-weight: 600; }

.sim-chart-card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.sim-stages {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}
.sim-stage {
    background: var(--c-cream);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
}
.sim-stage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}
.sim-stage-name {
    font-weight: 600;
    color: var(--c-forest);
    font-size: 13px;
}
.sim-stage-val {
    font-family: var(--font-serif);
    font-size: 18px;
    font-weight: 700;
    color: var(--c-sage);
}
.sim-stage-bar {
    height: 8px;
    background: var(--c-border);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 6px;
}
.sim-stage-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--c-forest) 0%, var(--c-sage) 100%);
    border-radius: 4px;
    transition: width 0.6s ease;
}
.sim-stage-desc {
    font-size: 11px;
    color: var(--c-muted);
    line-height: 1.4;
}

/* ─── Heatmap table ─── */
.heatmap-table-container {
    overflow-x: auto;
}
.heatmap-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
    font-family: var(--font-sans);
}
.heatmap-table th,
.heatmap-table td {
    border: 1px solid var(--c-border);
    padding: 6px 8px;
    text-align: center;
    white-space: nowrap;
}
.heatmap-table th {
    background: var(--c-sage-pale);
    color: var(--c-forest);
    font-weight: 600;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}
.heatmap-table .heatmap-rank {
    font-weight: 700;
    color: var(--c-sage);
    background: var(--c-cream);
}
.heatmap-table td {
    font-family: var(--font-mono);
    font-size: 10px;
}

/* ─── Markdown body (safety cards, memo) ─── */
.markdown-body {
    font-size: 13px;
    line-height: 1.6;
    color: var(--c-text);
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
    font-family: var(--font-serif);
    color: var(--c-forest);
    margin: 12px 0 6px;
}
.markdown-body h1 { font-size: 18px; }
.markdown-body h2 { font-size: 15px; }
.markdown-body h3 { font-size: 13px; }
.markdown-body p { margin-bottom: 8px; }
.markdown-body strong { color: var(--c-forest); }
.markdown-body code {
    font-family: var(--font-mono);
    background: var(--c-cream);
    padding: 1px 4px;
    border-radius: 3px;
    font-size: 12px;
}
.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0;
    font-size: 12px;
}
.markdown-body th,
.markdown-body td {
    border: 1px solid var(--c-border);
    padding: 4px 8px;
    text-align: left;
}
.markdown-body th {
    background: var(--c-sage-pale);
    font-weight: 600;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .hero-metrics { gap: var(--space-md); }
    .hero-metric-sep { display: none; }
    .chart-grid { grid-template-columns: 1fr; }
    .export-section { grid-template-columns: 1fr; }
    .header-nav { display: none; }
    .input-footer { flex-direction: column; align-items: stretch; }
    .input-actions { justify-content: space-between; }
}