:root {
  --bg-page: #f5f6fb;
  --bg-hero-start: #f4f0ff;
  --bg-hero-end: #e4f4ff;
  --bg-card: #ffffff;
  --border-subtle: #e2e5f0;

  --text-main: #111827;
  --text-muted: #6b7280;
  --text-soft: #9ca3af;

  --primary: #4f46e5;
  --primary-soft: #e0e7ff;
  --accent: #0ea5e9;
  --accent-soft: #cffafe;

  --shadow-soft: 0 18px 40px rgba(15, 23, 42, 0.08);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --transition-fast: 0.18s ease-out;
}

/* GLOBAL */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
}

.page {
  min-height: 100vh;
  padding: 24px 40px 40px;
}

/* HERO */

.hero {
  border-radius: 24px;
  padding: 26px 32px 24px;
  background: radial-gradient(circle at top left, var(--bg-hero-start), var(--bg-hero-end));
  box-shadow: var(--shadow-soft);
  margin-bottom: 24px;
}

.hero-content {
  max-width: 900px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(79, 70, 229, 0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 8px;
}

.hero-text {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0 0 16px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-card {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-value {
  font-size: 22px;
  font-weight: 700;
}

.stat-label {
  font-size: 12px;
  color: var(--text-soft);
}

/* MAIN LAYOUT */

.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 20px;
  align-items: flex-start;
}

/* CARDS */

.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  padding: 16px 18px;
  border: 1px solid rgba(226, 232, 240, 0.9);
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 6px;
}

.card-subtitle {
  font-size: 12px;
  color: var(--text-soft);
  margin: 0;
}

/* SIDEBAR */

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Substance list */

.substance-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.substance-btn {
  width: 100%;
  text-align: left;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  padding: 6px 10px;
  font-size: 13px;
  color: var(--text-main);
  background: #f9fafb;
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.substance-btn:hover {
  background: #eef2ff;
  border-color: var(--primary-soft);
  transform: translateY(-1px);
}

.substance-btn.active {
  background: #eef2ff;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(79, 70, 229, 0.15);
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
}

.dot-green { background: #22c55e; }
.dot-red { background: #ef4444; }
.dot-orange { background: #f97316; }
.dot-purple { background: #a855f7; }
.dot-blue { background: #3b82f6; }
.dot-teal { background: #14b8a6; }
.dot-yellow { background: #eab308; }
.dot-pink { background: #ec4899; }

/* Filters */

.filter-group {
  display: flex;
  flex-direction: column;
  margin-top: 8px;
  gap: 4px;
}

.filter-group label {
  font-size: 12px;
  color: var(--text-soft);
}

.filter-group select {
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  padding: 5px 8px;
  font-size: 13px;
}

/* Legend */

.legend-card {
  background: radial-gradient(circle at top left, #f5f3ff, #eff6ff);
}

.legend-list {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.legend-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-color {
  width: 14px;
  height: 10px;
  border-radius: 4px;
}

.lg-5 { background: #7c3aed; }
.lg-25 { background: #6366f1; }
.lg-10 { background: #3b82f6; }
.lg-05 { background: #38bdf8; }
.lg-01 { background: #e5e7eb; }
.lg-na { background: transparent; border: 1px dashed #d1d5db; }

/* CONTENT AREA */

.content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Main visualization card */

.main-vis-card {
  padding: 14px 16px 12px;
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

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

.card-body {
  margin-top: 6px;
}

#map-container {
  width: 100%;
  height: 380px;  
  border-radius: var(--radius-md);
  background: #f9fafb; 
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-card {
  min-height: 360px;
}


#map-chart {
  width: 100%;
  height: 100%;
}

/* Timeline */

.timeline {
  margin-top: 10px;
  border-top: 1px solid rgba(226, 232, 240, 0.9);
  padding-top: 10px;
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) auto;
  gap: 12px;
  align-items: center;
}

.timeline-label {
  font-size: 12px;
  color: var(--text-soft);
  margin-bottom: 2px;
}

.timeline-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-soft);
}

#year-slider {
  flex: 1;
}

.timeline-buttons {
  display: flex;
  gap: 8px;
}

/* Detail card */

.detail-card {
  min-height: 260px;
}

.detail-empty {
  text-align: center;
  padding: 20px 8px;
}

.detail-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 8px;
}

/* BUTTONS */

.primary-btn,
.secondary-btn {
  border-radius: 999px;
  border: none;
  padding: 6px 14px;
  font-size: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.primary-btn {
  background: var(--primary);
  color: white;
  box-shadow: 0 12px 25px rgba(79, 70, 229, 0.35);
}

.primary-btn:hover {
  background: #4338ca;
  transform: translateY(-1px);
}

.secondary-btn {
  background: #f9fafb;
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.secondary-btn:hover {
  background: #e5e7eb;
}

/* RESPONSIVE */

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    order: 2;
  }

  .content {
    order: 1;
  }
}

/* TOOLTIP */

#tooltip {
  position: fixed;
  pointer-events: none;
  background: rgba(15, 23, 42, 0.95);
  color: white;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 11px;
  line-height: 1.4;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.5);
  z-index: 9999;
  max-width: 220px;
}

#tooltip .tooltip-title {
  font-weight: 600;
  margin-bottom: 2px;
}

#tooltip .tooltip-substance {
  font-size: 10px;
  opacity: 0.8;
  margin-bottom: 4px;
}