/* ========== DESIGN TOKENS ========== */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-display: 'Inter', 'Helvetica Neue', sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

/* LIGHT MODE */
:root, [data-theme="light"] {
  --color-bg: #f0f4f8;
  --color-surface: #ffffff;
  --color-surface-2: #f8fafc;
  --color-surface-offset: #e2e8f0;
  --color-divider: #cbd5e1;
  --color-border: #e2e8f0;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-faint: #94a3b8;
  --color-text-inverse: #f8fafc;
  --color-primary: #0e7490;
  --color-primary-hover: #155e75;
  --color-primary-active: #164e63;
  --color-primary-light: #e0f2fe;
  --color-accent: #0284c7;
  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-purple: #7c3aed;
  --color-orange: #ea580c;
  --map-low: #e0f2fe;
  --map-mid: #38bdf8;
  --map-high: #0c4a6e;
  --map-stroke: #cbd5e1;
  --map-hover: #fbbf24;
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-surface-2: #1e293b;
  --color-surface-offset: #334155;
  --color-divider: #334155;
  --color-border: #475569;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-faint: #64748b;
  --color-text-inverse: #0f172a;
  --color-primary: #22d3ee;
  --color-primary-hover: #67e8f9;
  --color-primary-active: #06b6d4;
  --color-primary-light: #164e63;
  --color-accent: #38bdf8;
  --color-success: #4ade80;
  --color-warning: #fbbf24;
  --color-error: #f87171;
  --color-purple: #a78bfa;
  --color-orange: #fb923c;
  --map-low: #164e63;
  --map-mid: #0891b2;
  --map-high: #67e8f9;
  --map-stroke: #475569;
  --map-hover: #fbbf24;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f172a;
    --color-surface: #1e293b;
    --color-surface-2: #1e293b;
    --color-surface-offset: #334155;
    --color-divider: #334155;
    --color-border: #475569;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-text-faint: #64748b;
    --color-text-inverse: #0f172a;
    --color-primary: #22d3ee;
    --color-primary-hover: #67e8f9;
    --color-primary-active: #06b6d4;
    --color-primary-light: #164e63;
    --color-accent: #38bdf8;
    --color-success: #4ade80;
    --color-warning: #fbbf24;
    --color-error: #f87171;
    --color-purple: #a78bfa;
    --color-orange: #fb923c;
    --map-low: #164e63;
    --map-mid: #0891b2;
    --map-high: #67e8f9;
    --map-stroke: #475569;
    --map-hover: #fbbf24;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  }
}

/* ========== LAYOUT ========== */
.dashboard {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.dashboard-header h1 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.dashboard-header h1 svg {
  display: inline-block;
  flex-shrink: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.main-content {
  flex: 1;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ========== TAB NAV ========== */
.tab-nav {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface);
  padding: var(--space-1);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.tab-btn:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}
.tab-btn.active {
  color: var(--color-text-inverse);
  background: var(--color-primary);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ========== CARDS ========== */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.card-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
}

.card-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.card-body {
  padding: var(--space-5);
}

/* ========== KPI CARDS ========== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.kpi-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-5);
}

.kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.kpi-value {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  font-variant-numeric: tabular-nums lining-nums;
  margin-top: var(--space-1);
}

.kpi-delta {
  font-size: var(--text-xs);
  font-weight: 500;
  margin-top: var(--space-1);
}
.kpi-delta.up { color: var(--color-success); }
.kpi-delta.down { color: var(--color-error); }

/* ========== MAP ========== */
.map-container {
  position: relative;
  width: 100%;
  aspect-ratio: 1.8 / 1;
  min-height: 350px;
}

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

.map-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  max-width: 320px;
  opacity: 0;
  transition: opacity 120ms ease;
}
.map-tooltip.visible { opacity: 1; }

.tooltip-title {
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-1) 0;
  font-size: var(--text-xs);
}
.tooltip-row span:first-child { color: var(--color-text-muted); }
.tooltip-row span:last-child { font-weight: 600; color: var(--color-text); font-variant-numeric: tabular-nums; }

.map-legend {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

.legend-bar {
  height: 12px;
  width: 200px;
  border-radius: var(--radius-sm);
  background: linear-gradient(to right, var(--map-low), var(--map-mid), var(--map-high));
}

/* ========== DATA SELECT ========== */
.data-select {
  appearance: none;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

/* ========== TABLES ========== */
.data-table {
  width: 100%;
  font-size: var(--text-sm);
}
.data-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}
.data-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  font-variant-numeric: tabular-nums;
}
.data-table tbody tr:hover {
  background: var(--color-surface-offset);
}

/* ========== DONUT / CHART ========== */
.chart-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.chart-container {
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto;
}

.bar-chart-container {
  width: 100%;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.bar-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  min-width: 140px;
  flex-shrink: 0;
}

.bar-track {
  flex: 1;
  height: 24px;
  background: var(--color-surface-offset);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: var(--radius-sm);
  transition: width 600ms cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  padding-left: var(--space-2);
}

.bar-value {
  font-size: var(--text-xs);
  font-weight: 600;
  color: white;
  white-space: nowrap;
}

/* ========== SUPPLIER GUIDE ========== */
.steps-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: var(--space-8);
}

.step-item {
  position: relative;
  padding-bottom: var(--space-6);
}

.step-item::before {
  content: '';
  position: absolute;
  left: calc(var(--space-8) * -1 + 14px);
  top: 32px;
  width: 2px;
  height: calc(100% - 16px);
  background: var(--color-border);
}
.step-item:last-child::before { display: none; }

.step-number {
  position: absolute;
  left: calc(var(--space-8) * -1);
  top: 2px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.step-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.step-details {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.step-details ul {
  list-style: disc;
  padding-left: var(--space-4);
}
.step-details li {
  padding: var(--space-1) 0;
}

/* ========== SOURCE LIST ========== */
.source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

.source-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.source-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.source-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: var(--space-3);
}

.source-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.source-type {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.source-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========== BADGE ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
}
.badge-blue { background: var(--color-primary-light); color: var(--color-primary); }
.badge-green { background: rgba(22,163,74,0.1); color: var(--color-success); }
.badge-orange { background: rgba(217,119,6,0.1); color: var(--color-warning); }
.badge-purple { background: rgba(124,58,237,0.1); color: var(--color-purple); }

/* ========== FOOTER ========== */
.dashboard-footer {
  padding: var(--space-4) var(--space-6);
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  border-top: 1px solid var(--color-border);
}
.dashboard-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.dashboard-footer a:hover {
  color: var(--color-primary);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .main-content { padding: var(--space-4); gap: var(--space-4); }
  .chart-row { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .source-grid { grid-template-columns: 1fr; }
  .dashboard-header { padding: var(--space-3) var(--space-4); }
  .dashboard-header h1 { font-size: var(--text-base); }
  .card-header { flex-direction: column; align-items: flex-start; }
  .map-container { aspect-ratio: auto; min-height: 280px; }
}

@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr; }
  .tab-nav { gap: 0; }
  .tab-btn { padding: var(--space-2) var(--space-3); font-size: var(--text-xs); }
}