/* ============================================================
   U.S. State AI Policy Dashboard
   Design tokens match du-caid.github.io exactly.
   ============================================================ */

:root {
  --du-crimson: #BA0C2F;
  --du-gold:    #A89968;
  --text:       #1f2937;
  --muted:      #6b7280;
  --bg:         #ffffff;
  --surface:    #f8fafc;
  --border:     #e5e7eb;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.head-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}


.nav-links {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  padding: 0.4rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.95rem;
}

.nav-links a:hover { background: var(--surface); }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #7a0820 0%, var(--du-crimson) 50%, #9c0a26 100%);
  color: #fff;
  padding: 2.5rem 0 2rem;
}

.hero-map-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-map-bg svg {
  width: 100%;
  height: 100%;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin: 0 0 0.4rem;
  font-size: 2rem;
  line-height: 1.15;
}

.hero p {
  margin: 0 0 1.25rem;
  color: #ffe7ea;
  max-width: 60ch;
  font-size: 1rem;
}

.hero-meta {
  font-size: 0.85rem;
  color: #ffcdd4;
  margin: 0;
}

/* ── Tab Nav ─────────────────────────────────────────────── */
.tab-nav {
  border-bottom: 2px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 57px;
  z-index: 90;
}

.tab-nav-inner {
  display: flex;
  gap: 0;
}

.tab-btn {
  padding: 0.8rem 1.25rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.active {
  color: var(--du-crimson);
  border-bottom-color: var(--du-crimson);
  font-weight: 600;
}

/* ── Main content area ────────────────────────────────────── */
.tab-panel { padding: 1.5rem 0 3rem; }
.tab-panel.hidden { display: none; }

/* ── Metric cards ────────────────────────────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.1rem 1rem;
}

.metric-card .label {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}

.metric-card .value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--du-crimson);
  line-height: 1;
}

.metric-card .metric-sub {
  font-size: 0.73rem;
  color: var(--muted);
  margin-top: 0.35rem;
  line-height: 1.3;
}

/* ── Section panels ──────────────────────────────────────── */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--text);
}

/* ── Choropleth map ──────────────────────────────────────── */
#map-container {
  width: 100%;
  position: relative;
}

#map-container svg {
  width: 100%;
  height: auto;
  display: block;
}

#map-container path {
  stroke: #fff;
  stroke-width: 0.5px;
  cursor: pointer;
  transition: opacity 0.1s;
}

#map-container path:hover { opacity: 0.75; }

.map-tooltip {
  position: fixed;
  background: #1f2937;
  color: #fff;
  padding: 0.4rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.1s;
  z-index: 200;
  white-space: nowrap;
}

.map-legend {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
  margin-top: 0.75rem;
}

.legend-gradient {
  width: 120px;
  height: 10px;
  border-radius: 4px;
  background: linear-gradient(to right, #fce8ec, var(--du-crimson));
}

/* ── Charts ──────────────────────────────────────────────── */
.chart-wrap {
  position: relative;
  width: 100%;
}

/* ── Filters row ─────────────────────────────────────────── */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 1rem;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.filter-group label {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

select, input[type="search"], input[type="text"] {
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  font-family: inherit;
  font-size: 0.9rem;
  background: var(--bg);
  color: var(--text);
  min-width: 150px;
}

select:focus, input:focus {
  outline: 2px solid var(--du-crimson);
  outline-offset: 1px;
}

.filter-check {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  padding-bottom: 0.45rem;
  align-self: flex-end;
  cursor: pointer;
}

.filter-check input[type="checkbox"] {
  min-width: unset;
  width: 1rem;
  height: 1rem;
  accent-color: var(--du-crimson);
  cursor: pointer;
}

/* ── Results count ───────────────────────────────────────── */
.results-count {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

/* ── Table ───────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
  font-size: 0.9rem;
}

thead th {
  text-align: left;
  padding: 0.5rem 0.6rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

tbody td {
  padding: 0.55rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

tbody tr.bill-row {
  cursor: pointer;
}

tbody tr.bill-row:hover td {
  background: var(--surface);
}

tbody tr.detail-row td {
  background: #fafbfc;
  padding: 0.75rem 1rem;
  cursor: default;
}

tbody tr.bill-row.expanded td {
  background: var(--surface);
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.tag-core     { background: #fee2e2; color: #991b1b; }
.tag-adjacent { background: #fef3c7; color: #92400e; }
.tag-ncsl     { background: #d1fae5; color: #065f46; }

/* ── Bill detail panel ───────────────────────────────────── */
.bill-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.detail-field .field-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 0.15rem;
}

.detail-field .field-value {
  font-size: 0.9rem;
}

.concepts-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.concept-tag {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1rem 0.5rem;
  font-size: 0.78rem;
  color: var(--muted);
}

/* ── Methods tab ─────────────────────────────────────────── */
.panel p {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  line-height: 1.65;
}

.panel p:last-child { margin-bottom: 0; }

.methods-tiers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 0.75rem 0;
}

.tier-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
}

.tier-card .tier-label {
  display: inline-block;
  margin-bottom: 0.5rem;
}

.tier-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text);
}

.methods-list {
  padding-left: 1.25rem;
  margin: 0;
}

.methods-list li {
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 0.6rem;
  color: var(--text);
}

.methods-list li:last-child { margin-bottom: 0; }

.methods-citation {
  background: var(--surface);
  border-left: 3px solid var(--du-crimson);
  border-radius: 0 0.5rem 0.5rem 0;
  margin: 0.75rem 0;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--text);
}

@media (max-width: 600px) {
  .methods-tiers { grid-template-columns: 1fr; }
}

/* ── Side-by-side chart grid ─────────────────────────────── */
.chart-side-by-side {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.chart-side-by-side h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 0.75rem;
}

@media (max-width: 700px) {
  .chart-side-by-side { grid-template-columns: 1fr; }
}

/* ── Links ───────────────────────────────────────────────── */
a { color: var(--du-crimson); }
a:hover { text-decoration: underline; }

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 0;
  gap: 0.25rem;
  text-align: center;
}

.footer-inner small {
  color: var(--muted);
  font-size: 0.88rem;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 900px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 1.5rem; }
  .tab-btn { padding: 0.7rem 0.75rem; font-size: 0.85rem; }
  .bill-detail { grid-template-columns: 1fr; }
}