/* ============================================
   IADC — Elegant & Clean
   Minimal surfaces, clear hierarchy, IADC red accent
   ============================================ */

:root {
    /* IADC palette */
    --iadc-red: #E2002B;
    --iadc-maroon: #A0001F;
    --iadc-charcoal: #2d2d2d;
    --iadc-gray: #6b6b6b;

    /* Surfaces — flat, clean */
    --bg-page: #f6f6f6;
    --bg-card: #ffffff;
    --bg-muted: #fafafa;

    /* Text */
    --text-primary: #2d2d2d;
    --text-secondary: #525252;
    --text-muted: #6b6b6b;
    --text-inverse: #ffffff;

    /* Accent — IADC red family (reddish identity) */
    --accent-primary: #E2002B;
    --accent-primary-hover: #c40028;
    --accent-secondary: #A0001F;
    --accent-success: #A0001F;
    --accent-warning: #b45309;
    --accent-danger: #E2002B;

    /* Borders — light, consistent */
    --border-default: #ebebeb;
    --border-strong: #ddd;

    /* Shadows — soft, neutral */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);

    /* Radius — subtle */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;

    /* Soft accents — warm, red-friendly */
    --accent-warning-soft: #fef3e2;
    --accent-success-soft: #fdf2f4;
    --accent-primary-subtle: rgba(226, 0, 43, 0.12);
    --border-accent: rgba(226, 0, 43, 0.25);
}

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

body {
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    padding: 32px 24px;
    padding-top: 80px;
    min-height: 100vh;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ----- Header ----- */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 48px 40px;
    background: var(--accent-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.header h1 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 600;
    color: var(--text-inverse);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.header .subtitle {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 4px;
    font-weight: 500;
}

.header p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.85);
}

/* ----- Navigation ----- */
.nav-container {
    margin-bottom: 36px;
}

.nav-row {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.nav-btn {
    padding: 10px 20px;
    border: 1px solid var(--border-default);
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-btn:hover {
    border-color: var(--border-strong);
    color: var(--text-primary);
    background: var(--bg-muted);
}

.nav-btn.active {
    background: var(--accent-primary);
    color: var(--text-inverse);
    border-color: var(--accent-primary);
}

.nav-btn .icon {
    display: inline-flex;
    align-items: center;
    opacity: 0.95;
}

.nav-btn .icon svg {
    width: 1.15em;
    height: 1.15em;
    flex-shrink: 0;
    stroke: currentColor;
}

/* Inline icons in headings / labels */
.icon-inline {
    display: inline-flex;
    align-items: center;
    margin-right: 0.4em;
    vertical-align: -0.2em;
}

.icon-inline svg {
    width: 1.1em;
    height: 1.1em;
    stroke: currentColor;
}

.timeline-header-icon {
    display: inline-flex;
    align-items: center;
}

.timeline-header-icon svg {
    width: 2rem;
    height: 2rem;
    stroke: var(--accent-primary);
}

.impact-card .icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.impact-card .icon svg {
    width: 2.25rem;
    height: 2.25rem;
    stroke: var(--accent-primary);
    stroke-width: 1.5;
}

.chart-title .icon-inline svg,
.block-title .icon-inline svg {
    width: 1.15em;
    height: 1.15em;
}

/* ----- Content Sections ----- */
.content-section {
    display: none;
    position: relative;
    clear: both;
    z-index: 1;
    padding-top: 8px;
}

.content-section.active {
    display: block;
    animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ----- Section Headers ----- */
.section-header {
    background: var(--bg-card);
    padding: 28px 32px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-primary);
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ----- Executive Summary ----- */
.executive-summary {
    background: var(--bg-card);
    padding: 28px 32px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-success);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.summary-card {
    background: var(--bg-muted);
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-default);
    border-left: 3px solid var(--accent-primary);
}

.summary-card h3 {
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
}

.summary-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.875rem;
}

/* ----- Content Cards ----- */
.content-card {
    background: var(--bg-card);
    padding: 28px 32px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid var(--border-default);
    overflow-x: auto;
}

.content-card:hover {
    border-color: var(--border-strong);
}

.content-card h3 {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.content-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
    margin-bottom: 12px;
}

.content-card ul {
    list-style: none;
    padding-left: 0;
}

.content-card li {
    color: var(--text-secondary);
    line-height: 1.7;
    padding-left: 24px;
    position: relative;
    margin-bottom: 8px;
    font-size: 0.9375rem;
}

.content-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-success);
    font-weight: 600;
    font-size: 1rem;
}

/* ----- Tables ----- */
.comparison-table {
    width: 100%;
    min-width: 600px;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-default);
}

.comparison-table th {
    background: var(--bg-muted);
    color: var(--text-primary);
    padding: 14px 20px;
    text-align: left;
    font-size: 0.8125rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-default);
}

.comparison-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-default);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover td {
    background: var(--bg-muted);
}

.comparison-table .metric {
    font-weight: 600;
    color: var(--text-primary);
}

.comparison-table .positive {
    color: var(--accent-success);
    font-weight: 500;
}

.comparison-table .baseline {
    color: var(--accent-danger);
    font-weight: 500;
}

/* ----- Tech Grid ----- */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.tech-card {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-primary);
}

.tech-card:hover {
    border-color: var(--border-strong);
}

.tech-card h4 {
    color: var(--text-primary);
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.tech-card p {
    color: var(--text-secondary);
    line-height: 1.65;
    font-size: 0.9375rem;
}

/* ----- Comparison Panels ----- */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.comparison-panel {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-primary);
}

.comparison-panel h3 {
    color: var(--text-primary);
    margin-bottom: 12px;
    font-size: 1rem;
    font-weight: 600;
}

/* ----- Controls ----- */
.controls-section {
    background: var(--bg-card);
    padding: 28px 32px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-primary);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.control-group {
    background: var(--bg-muted);
    padding: 16px 18px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-default);
    border-left: 3px solid var(--accent-primary);
}

.control-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.control-group select {
    width: 100%;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-default);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.9375rem;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.control-group select:hover,
.control-group select:focus {
    border-color: var(--accent-primary);
    outline: none;
}

.control-group select option {
    background: var(--bg-card);
    color: var(--text-primary);
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-default);
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

.slider-value {
    display: block;
    text-align: right;
    margin-top: 6px;
    color: var(--accent-primary);
    font-weight: 600;
    font-size: 0.9375rem;
}

/* ----- Section Block (titles) ----- */
.section-block {
    margin-top: 28px;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-default);
}

.section-block .block-title {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0 0 4px 0;
}

.section-block .block-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0;
}

/* ----- Metrics ----- */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.metric-box {
    background: var(--bg-card);
    padding: 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    text-align: center;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.metric-box::before {
    display: none;
}

.metric-box:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
}

.metric-box .label {
    color: var(--text-muted);
    font-size: 0.8125rem;
    margin-bottom: 8px;
}

.metric-box .value {
    color: var(--accent-primary);
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.02em;
}

.metric-box .unit {
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

.metric-card {
    background: var(--bg-card);
    padding: 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    min-height: 100px;
}

.metric-card::before {
    display: none;
}

.metric-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
}

.metric-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.metric-value {
    font-size: 1.625rem;
    font-weight: 700;
    color: var(--accent-primary);
    letter-spacing: -0.02em;
}

.metric-change {
    font-size: 0.8125rem;
    margin-top: 4px;
    color: var(--text-secondary);
}

.metric-change.positive {
    color: var(--accent-success);
}

.metric-change.negative {
    color: var(--accent-danger);
}

/* ----- Impact Cards ----- */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px;
    margin: 22px 0;
}

.impact-card {
    background: var(--bg-card);
    padding: 24px 20px;
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-default);
    transition: border-color 0.2s ease;
}

.impact-card:hover {
    border-color: var(--border-strong);
}

.impact-card .icon {
    font-size: 2rem;
    margin-bottom: 12px;
    opacity: 0.9;
}

.impact-card .value {
    color: var(--accent-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.impact-card .label {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* ----- Status Section ----- */
.status-section {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    margin-bottom: 24px;
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    margin-top: 14px;
}

.status-item {
    background: var(--bg-muted);
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-success);
    display: flex;
    align-items: center;
    gap: 12px;
    transition: border-color 0.2s ease;
}

.status-item:hover {
    border-color: var(--border-strong);
}

.status-led {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent-success);
    flex-shrink: 0;
}

.status-led.standby {
    background: var(--accent-warning);
}

.status-name {
    font-weight: 600;
    margin-bottom: 2px;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.status-value {
    font-size: 0.75rem;
    color: var(--accent-success);
    font-weight: 500;
}

/* ----- Charts ----- */
.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 22px;
    margin: 26px 0;
}

.comparison-charts-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.comparison-chart-wrap {
    position: relative;
    height: 260px;
    width: 100%;
}

.chart-container {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    min-height: 320px;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s ease;
}

.chart-container:hover {
    border-color: var(--border-strong);
}

.chart-title {
    font-size: 1.0625rem;
    margin-bottom: 18px;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.01em;
}

/* Comparison tab: bar cards (replacing canvas charts) */
.comparison-metric-card {
    background: var(--bg-card);
    padding: 20px 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    min-height: 160px;
    display: flex;
    flex-direction: column;
    transition: border-color 0.2s ease;
}
.comparison-metric-card:hover {
    border-color: var(--border-strong);
}
.comparison-metric-card .comparison-bar-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.comparison-bar-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.comparison-bar-row:last-child {
    margin-bottom: 0;
}
.comparison-bar-label {
    flex: 0 0 28px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.comparison-bar-row.bar-a .comparison-bar-label { color: #2563eb; }
.comparison-bar-row.bar-b .comparison-bar-label { color: #059669; }
.comparison-bar-track {
    flex: 1;
    height: 24px;
    background: var(--border-default);
    border-radius: 6px;
    overflow: hidden;
    min-width: 0;
}
.comparison-bar-fill {
    height: 100%;
    border-radius: 6px;
    min-width: 4px;
    transition: width 0.25s ease;
}
.comparison-bar-row.bar-a .comparison-bar-fill { background: rgba(37, 99, 235, 0.85); }
.comparison-bar-row.bar-b .comparison-bar-fill { background: rgba(5, 150, 105, 0.85); }
.comparison-bar-value {
    flex: 0 0 auto;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 52px;
    text-align: right;
}

/* ----- Alert / Success Boxes ----- */
.alert-box {
    background: var(--accent-warning-soft);
    padding: 18px 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-warning);
    margin: 20px 0;
}

.alert-box h4 {
    color: var(--accent-warning);
    margin-bottom: 8px;
    font-size: 1rem;
    font-weight: 700;
}

.alert-box p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

.success-box {
    background: var(--accent-success-soft);
    padding: 18px 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    border-left: 4px solid var(--accent-success);
    margin: 20px 0;
}

.success-box h4 {
    color: var(--accent-success);
    margin-bottom: 8px;
    font-size: 1rem;
    font-weight: 700;
}

.success-box p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* ----- Print Button ----- */
.print-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    background: var(--accent-primary);
    color: var(--text-inverse);
    border: none;
    border-radius: 999px;
    font-weight: 500;
    cursor: pointer;
    font-size: 0.875rem;
    font-family: inherit;
    box-shadow: var(--shadow-sm);
    transition: background 0.2s ease;
    z-index: 1000;
}

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

.print-btn .icon {
    display: inline-flex;
    align-items: center;
    margin-right: 6px;
}

.print-btn .icon svg {
    width: 1.1em;
    height: 1.1em;
    stroke: currentColor;
}

/* ----- Tech Toggles ----- */
.tech-toggle {
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: 999px;
    transition: border-color 0.2s ease, background 0.2s ease;
    font-weight: 500;
    font-size: 0.9375rem;
}

.tech-toggle input[type="checkbox"] {
    margin-right: 8px;
    cursor: pointer;
    width: 16px;
    height: 16px;
    accent-color: var(--accent-primary);
}

.tech-toggle .toggle-label {
    cursor: pointer;
}

.tech-toggle:hover {
    border-color: var(--border-strong);
}

.tech-toggle:has(input:checked) {
    background: var(--accent-success-soft);
    border-color: var(--accent-success);
    color: var(--text-primary);
}

.tech-toggle input[type="checkbox"]:checked + .toggle-label,
.tech-toggle input:checked + .toggle-label {
    color: var(--text-primary);
}

/* ----- Timeline Section ----- */
.timeline-header-box {
    display: flex;
    align-items: center;
    gap: 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
    border-left: 4px solid var(--accent-primary);
}

.timeline-header-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.timeline-header-content h2 {
    color: var(--text-primary);
    margin: 0 0 6px 0;
    font-size: 1.25rem;
    font-weight: 600;
}

.timeline-header-content p {
    color: var(--text-secondary);
    margin: 0;
    font-size: 0.9375rem;
}

.timeline-slider-box {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
}

.slider-label {
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 12px;
    font-size: 0.9375rem;
}

.timeline-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-default);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.timeline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

.timeline-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: 2px solid var(--bg-card);
}

.slider-range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.slider-right {
    text-align: center;
    padding: 16px 32px;
    background: var(--bg-muted);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-default);
    min-width: 120px;
}

.year-display {
    font-size: 2rem;
    color: var(--accent-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.year-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 4px;
}

.timeline-metrics-box,
.timeline-chart-container,
.timeline-scenario-box {
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 24px;
}

.timeline-metrics-box h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
    font-size: 1.0625rem;
    font-weight: 600;
}

.timeline-metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.timeline-metric-card {
    background: var(--bg-muted);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    transition: border-color 0.2s ease;
}

.timeline-metric-card:hover {
    border-color: var(--border-strong);
}

.metric-unit {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.scenario-label {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 12px;
    font-size: 0.9375rem;
}

.timeline-scenario-select {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    cursor: pointer;
}

.timeline-scenario-select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.timeline-scenario-select option {
    background: var(--bg-card);
    color: var(--text-primary);
}

.timeline-charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
    body {
        padding: 16px;
        padding-top: 64px;
    }

    .header {
        padding: 24px 20px;
    }

    .header h1 {
        font-size: 1.375rem;
    }

    .nav-btn {
        padding: 10px 16px;
        font-size: 0.875rem;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

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

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

    .comparison-table {
        min-width: 320px;
        font-size: 0.875rem;
    }

    .content-card {
        padding: 20px 16px;
    }
}

/* ----- Print ----- */
@media print {
    body {
        background: #fff;
        color: #000;
    }

    .print-btn,
    .nav-container {
        display: none !important;
    }

    .content-card,
    .section-header,
    .header {
        border-color: #ddd;
        box-shadow: none;
    }
}