:root {
    --header-bg: #161616;
    --hero-bg: #ffffff;
    --hero-text: #161616;
    --brand: #8a3ffc;
    --brand-light: #8a3ffc;
    --sand: #f4f4f4;
    --foam: #ffffff;
    --ink: #161616;
    --ink-soft: #525252;
    --coral: #b8471f;
    --amber: #8a5a00;
    --moss: #5b8266;
    --border: #e0e0e0;
    --card-bg: #ffffff;
    --page-bg: var(--foam);
    --shadow: 0 6px 20px rgba(22, 22, 22, 0.08);
}

[data-theme="dark"] {
    --hero-bg: #161616;
    --hero-text: #f4f4f4;
    --brand-light: #d0a9ff;
    --amber: #d99a3d;
    --page-bg: #161616;
    --ink: #f4f4f4;
    --ink-soft: #c6c6c6;
    --border: #393939;
    --card-bg: #262626;
    --sand: #262626;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }

html { font-size: 100%; }

body {
    margin: 0;
    background: var(--page-bg);
    color: var(--ink);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    transition: background-color 0.25s ease, color 0.25s ease;
}

h1, h2, h3 {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 0.4em 0;
}

.eyebrow {
    font-family: 'Inter', monospace;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--brand);
}

[data-theme="dark"] .eyebrow { color: var(--brand-light); }

a { color: var(--brand); }
[data-theme="dark"] a { color: var(--brand-light); }

.data-figure {
    font-family: 'Inter', monospace;
}

/* ---------- header / footer ---------- */

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 2rem;
    background: var(--header-bg);
    color: var(--foam);
}

.wordmark {
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--foam) !important;
    text-decoration: none;
    letter-spacing: 0.01em;
}

.site-header nav a {
    color: var(--foam) !important;
    text-decoration: none;
    font-weight: 500;
    margin-right: 1rem;
}

.site-header nav a:hover { text-decoration: underline; }

.site-header .controls {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

.site-header .controls button,
.site-header .controls select {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: var(--foam);
    padding: 0.4rem 0.9rem;
    border-radius: 5px;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
}

.site-header .controls select option {
    color: var(--ink);
}

.site-footer {
    text-align: center;
    padding: 2rem;
    font-size: 0.85rem;
    color: var(--ink-soft);
}

main { min-height: 70vh; }

/* ---------- buttons ---------- */

.btn-cta {
    display: inline-block;
    background: var(--coral);
    color: #fff;
    padding: 0.85rem 1.8rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    border: none;
    cursor: pointer;
    transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn-cta:hover { opacity: 0.92; transform: translateY(-1px); }

/* ---------- landing page ---------- */

.hero {
    background: var(--hero-bg);
    color: var(--hero-text);
    padding: 5rem 2rem 4rem;
    text-align: center;
}

.hero h1 {
    color: var(--hero-text);
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    max-width: 850px;
    margin: 0.5rem auto 1rem;
}

.hero p.lede {
    max-width: 640px;
    margin: 0 auto 2rem;
    font-size: 1.15rem;
    color: var(--ink-soft);
}

.section {
    max-width: 980px;
    margin: 0 auto;
    padding: 3.5rem 2rem;
}

.section h2 { font-size: 1.8rem; margin-bottom: 1rem; }

.how-it-works {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.how-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.how-card .eyebrow { display: block; margin-bottom: 0.5rem; }

.dataset-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    font-size: 0.95rem;
}

.dataset-table th, .dataset-table td {
    text-align: left;
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--border);
}

.dataset-table th {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-soft);
}

.cta-band {
    text-align: center;
    padding: 3rem 2rem 4.5rem;
}

/* ---------- app / country page ---------- */

.country-picker-bar {
    background: var(--sand);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
}

.picker-form {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.picker-form label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-soft);
}

.picker-form select {
    padding: 0.5rem 0.8rem;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--ink);
    font-family: inherit;
    font-size: 0.95rem;
}

.country-header {
    max-width: 980px;
    margin: 0 auto;
    padding: 2.5rem 2rem 1.5rem;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 760px) {
    .country-header { grid-template-columns: 1fr; }
}

.country-header h1 { font-size: 2.3rem; }

.fact-row {
    display: flex;
    gap: 2rem;
    margin: 1rem 0;
}

.fact-row .data-figure {
    font-size: 1.3rem;
    color: var(--ink);
}

.bridge-note {
    background: var(--card-bg);
    border-left: 3px solid var(--brand);
    border-radius: 6px;
    padding: 1rem 1.2rem;
    margin-top: 1rem;
    font-size: 0.98rem;
}

#locator-map {
    height: 260px;
    border-radius: 10px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.compare-bar {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 2rem 1rem;
}

.compare-bar form {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    flex-wrap: wrap;
}

.pillar {
    max-width: 980px;
    margin: 0 auto;
    padding: 2.5rem 2rem;
    border-top: 1px solid var(--border);
}

.pillar-narrative {
    max-width: 680px;
    margin-bottom: 1.5rem;
}

.pillar-narrative p { color: var(--ink-soft); }

.chart-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .chart-grid {
        grid-template-columns: 1fr;
    }
}

/* Heatmaps, ranked bar charts, and Sankey diagrams all carry many
   category labels (products, energy sources, flow nodes) that get
   illegible when squeezed into a half-width column -- measured at
   only 406px wide in the standard 2-column grid, not enough room for
   labels like "Vegetables, fresh n.e.c." or an 8-node Sankey. These
   chart types get the full row instead; line charts and tail-risk
   (fewer/shorter labels) are fine at half width. */
.chart-card[data-charttype="heatmap"],
.chart-card[data-charttype="ranked"],
.chart-card[data-charttype="sankey"] {
    grid-column: 1 / -1;
}

.chart-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.2rem;
    box-shadow: var(--shadow);
}

.chart-card h3 {
    font-size: 1.05rem;
    margin-bottom: 0.2rem;
}

.chart-card .plotly-chart {
    width: 100%;
    min-height: 300px;
}

.legend-key {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    font-size: 0.8rem;
    font-family: 'IBM Plex Mono', monospace;
    margin-top: 0.6rem;
    color: var(--ink-soft);
}

.legend-key span::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 0.4rem;
    vertical-align: middle;
}

.legend-key .k-primary::before { background: var(--brand); }
.legend-key .k-median::before { background: var(--ink-soft); }
.legend-key .k-compare::before { background: var(--coral); }

/* ---------- action steps ---------- */

.action-steps {
    background: var(--sand);
    padding: 3rem 2rem 4rem;
}

.action-steps-inner {
    max-width: 980px;
    margin: 0 auto;
}

.action-card {
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid var(--border);
    padding: 1.8rem;
    box-shadow: var(--shadow);
}

.action-card h3 { color: var(--coral); }

/* ---------- 404 ---------- */

.error-page {
    text-align: center;
    padding: 6rem 2rem;
}

.error-page h1 {
    font-size: 5rem;
    color: var(--brand);
    margin-bottom: 0;
}

/* ---------- misc ---------- */

/* ---------- single headline stat (landing) ---------- */

.headline-stat {
    max-width: 640px;
    margin: 2.5rem auto 0;
    padding: 1.5rem;
    background: var(--sand);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.headline-stat .stat-value {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 2.2rem;
    color: var(--amber);
}

/* ---------- chart subtitle: how to read this chart (compare-mode charts) ---------- */

.chart-subtitle {
    font-size: 0.85rem;
    color: var(--ink-soft);
    margin: 0.2rem 0 1rem;
    line-height: 1.4;
}

/* ---------- per-chart insight / "Takeaway" callout ---------- */

.chart-insight {
    font-size: 0.92rem;
    color: var(--ink-soft);
    margin-top: 0.8rem;
    padding-top: 0.8rem;
    border-top: 1px solid var(--border);
}

.chart-insight .takeaway-label {
    font-weight: 700;
    color: var(--ink);
}

/* ---------- country-panel header (compare-mode, non-line charts) ---------- */
/* Reuses the two colors already assigned these roles everywhere else in
   the app (legend keys, locator dots) -- brand = primary, coral =
   compare -- so a heatmap/ranked/Sankey pair reads the same way a
   line-chart legend already does. Independent of, and layered on top of,
   the existing per-chart-type left-border accent. */

.chart-panel-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.4rem;
}

.chart-panel-label.role-primary { color: var(--brand); }
.chart-panel-label.role-compare { color: var(--coral); }
[data-theme="dark"] .chart-panel-label.role-primary { color: var(--brand-light); }

/* ---------- action steps / climate action block ---------- */

.action-card p, .action-card ul { margin: 0.4em 0; }
.action-card strong { color: var(--brand); }
[data-theme="dark"] .action-card strong { color: var(--brand-light); }

.climate-action-block {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.action-plan-status {
    font-size: 0.9rem;
    color: var(--ink-soft);
    margin-top: 0.6rem;
    min-height: 1.2em;
}

.action-plan-output {
    margin-top: 1rem;
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

.chart-grid.v2-extra {
    margin-top: 1.5rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -3rem;
    left: 0.5rem;
    background: var(--brand);
    color: #ffffff;
    padding: 0.6rem 1.2rem;
    border-radius: 0 0 6px 6px;
    z-index: 100;
    text-decoration: none;
    font-weight: 600;
    transition: top 0.15s ease;
}

.skip-link:focus {
    top: 0;
}

.chart-empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--ink-soft);
    font-size: 0.9rem;
    font-style: italic;
    background: var(--sand);
    border-radius: 6px;
    border: 1px dashed var(--border);
}

/* ---------- tabs (v2) ---------- */

.tab-list {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: 1.2rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0.6rem;
}

.tab-btn {
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--ink-soft);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
}

.tab-btn.active {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
}

[data-theme="dark"] .tab-btn.active { color: var(--foam); }

.tab-panel {
    /* visibility controlled inline via JS; this just resets spacing */
}

.pillar {
    scroll-margin-top: 4rem;
}

/* ---------- v2: tabs ---------- */

.tab-bar {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
}

.tab-button {
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.6rem 0.2rem;
    margin-right: 1.2rem;
    font-family: 'IBM Plex Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--ink-soft);
    cursor: pointer;
}

.tab-button:hover {
    color: var(--ink);
}

.tab-button.active {
    color: var(--brand);
    border-bottom-color: var(--brand);
}

[data-theme="dark"] .tab-button.active {
    color: var(--brand-light);
    border-bottom-color: var(--brand-light);
}

.tab-panel {
    display: none;
}