/* ============================================================
   OilRoutes.org — Design System
   Bloomberg terminal meets cartographic atlas.
   Dark, restrained, data-forward. Infrastructure, not a toy.
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

:root {
  /* Palette — deep naval dark, amber/gold accents */
  --bg-primary: #0a0e13;
  --bg-secondary: #0f1419;
  --bg-tertiary: #151c24;
  --bg-elevated: #1a222d;
  --bg-surface: #1e2730;
  
  --border-subtle: rgba(255,255,255,0.06);
  --border-medium: rgba(255,255,255,0.1);
  --border-strong: rgba(255,255,255,0.18);
  
  --text-primary: #e8eaed;
  --text-secondary: #9aa0a8;
  --text-tertiary: #5f6770;
  --text-inverse: #0a0e13;
  
  /* Semantic colors */
  --color-underway: #22c55e;
  --color-anchored: #f59e0b;
  --color-crude: #e74c3c;
  --color-product: #3b82f6;
  --color-chemical: #a855f7;
  --color-lng: #06b6d4;
  --color-tanker-general: #f97316;
  --color-accent: #c9a44e;
  --color-accent-muted: rgba(201,164,78,0.15);
  
  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', 'Consolas', monospace;
  
  --text-xs: 0.6875rem;    /* 11px */
  --text-sm: 0.75rem;      /* 12px */
  --text-base: 0.8125rem;  /* 13px */
  --text-md: 0.875rem;     /* 14px */
  --text-lg: 1rem;         /* 16px */
  --text-xl: 1.25rem;      /* 20px */
  
  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  
  /* Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  
  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-normal: 250ms var(--ease-out);
  
  /* Shadows */
  --shadow-panel: 0 8px 32px rgba(0,0,0,0.5), 0 0 0 1px var(--border-subtle);
  
  /* Layout */
  --header-height: 48px;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow: hidden;
  height: 100dvh;
  width: 100vw;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
  font: inherit;
}

/* --- Stats Strip (Header) --- */
#stats-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.stats-strip-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--space-4);
  gap: var(--space-4);
}

.logo-area {
  flex-shrink: 0;
}

.logo {
  width: 120px;
  height: 24px;
  color: var(--text-primary);
}

.stats-grid {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.stats-grid::-webkit-scrollbar { display: none; }

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: fit-content;
  padding: 0 var(--space-2);
}

.stat-item-chokepoint {
  cursor: pointer;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}
.stat-item-chokepoint:hover {
  background: var(--bg-elevated);
}

.stat-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  white-space: nowrap;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.stat-underway { color: var(--color-underway); }
.stat-anchored { color: var(--color-anchored); }

.stat-divider {
  width: 1px;
  height: 24px;
  background: var(--border-medium);
  flex-shrink: 0;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.header-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.header-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
  background: var(--bg-elevated);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  white-space: nowrap;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-anchored);
  animation: pulse-dot 2s infinite;
}

.connection-status.connected .status-dot {
  background: var(--color-underway);
  animation: none;
}

.connection-status.error .status-dot {
  background: var(--color-crude);
  animation: none;
}

.connection-status.simulation .status-dot {
  background: var(--color-accent);
  animation: pulse-dot 3s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* --- Map --- */
#map {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
}

.maplibregl-ctrl-bottom-left,
.maplibregl-ctrl-bottom-right {
  bottom: 28px !important;
}

.maplibregl-ctrl-attrib {
  background: rgba(10,14,19,0.8) !important;
  color: var(--text-tertiary) !important;
  font-size: 10px !important;
}
.maplibregl-ctrl-attrib a {
  color: var(--text-tertiary) !important;
}

/* Map navigation controls */
.maplibregl-ctrl-group {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-medium) !important;
  border-radius: var(--radius-md) !important;
}
.maplibregl-ctrl-group button {
  border-color: var(--border-subtle) !important;
}
.maplibregl-ctrl-group button + button {
  border-top: 1px solid var(--border-subtle) !important;
}
.maplibregl-ctrl button .maplibregl-ctrl-icon {
  filter: invert(1) brightness(0.8);
}

/* Vessel markers */
.vessel-marker {
  cursor: pointer;
  transition: transform 0.1s ease;
}
.vessel-marker:hover {
  transform: scale(1.3);
  z-index: 10 !important;
}

/* Map popup */
.maplibregl-popup-content {
  background: var(--bg-elevated) !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--border-medium) !important;
  border-radius: var(--radius-md) !important;
  padding: var(--space-2) var(--space-3) !important;
  font-family: var(--font-body) !important;
  font-size: var(--text-sm) !important;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4) !important;
  max-width: 220px !important;
}
.maplibregl-popup-close-button {
  color: var(--text-tertiary) !important;
  font-size: 16px !important;
  right: 4px !important;
  top: 2px !important;
}
.maplibregl-popup-tip {
  border-top-color: var(--bg-elevated) !important;
}
.popup-name {
  font-weight: 600;
  font-size: var(--text-base);
  margin-bottom: 2px;
}
.popup-detail {
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

/* --- Panels --- */
.panel {
  position: fixed;
  top: var(--header-height);
  right: 0;
  bottom: 0;
  width: 340px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  z-index: 90;
  display: flex;
  flex-direction: column;
  transform: translateX(0);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  box-shadow: -4px 0 24px rgba(0,0,0,0.3);
  overflow: hidden;
}

.panel.hidden {
  transform: translateX(100%);
  pointer-events: none;
  opacity: 0;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.panel-header button {
  color: var(--text-tertiary);
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.panel-header button:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  scrollbar-width: thin;
  scrollbar-color: var(--bg-surface) transparent;
}

/* --- Vessel Detail Panel --- */
.vessel-type-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-muted);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.vessel-details {
  width: 100%;
  border-collapse: collapse;
}

.vessel-details tr {
  border-bottom: 1px solid var(--border-subtle);
}

.vessel-details td {
  padding: var(--space-2) 0;
  vertical-align: top;
}

.detail-label {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  text-transform: uppercase;
  width: 100px;
}

.detail-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-primary);
  word-break: break-all;
}

/* --- Chokepoint Dashboard --- */
.chokepoint-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-3);
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.chokepoint-card:hover {
  border-color: var(--border-medium);
  background: var(--bg-elevated);
}

.chokepoint-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.chokepoint-card-name {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--text-primary);
}

.chokepoint-card-count {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-accent);
}

.chokepoint-card-meta {
  display: flex;
  gap: var(--space-4);
}

.chokepoint-meta-item {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.chokepoint-meta-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.chokepoint-meta-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.chokepoint-recent {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

.chokepoint-recent-title {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.chokepoint-transit {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 0;
  font-size: var(--text-xs);
}

.chokepoint-transit-name {
  color: var(--text-secondary);
  font-weight: 500;
}

.chokepoint-transit-time {
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  font-size: 10px;
}

/* --- Attribution --- */
#attribution {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  font-size: 10px;
  color: var(--text-tertiary);
  z-index: 50;
}

#attribution a {
  color: var(--text-secondary);
  font-weight: 500;
}

.attr-sep {
  opacity: 0.3;
}

/* --- Chokepoint Zone Overlays --- */
.chokepoint-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(10,14,19,0.7);
  padding: 2px 6px;
  border-radius: 2px;
  border: 1px solid rgba(201,164,78,0.2);
  white-space: nowrap;
  pointer-events: none;
}

/* --- Vessel Legend --- */
#vessel-legend {
  position: fixed;
  bottom: 32px;
  left: var(--space-3);
  z-index: 80;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.legend-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 2px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --header-height: 40px;
  }
  
  .stats-strip-inner {
    padding: 0 var(--space-2);
    gap: var(--space-2);
  }
  
  .logo {
    width: 80px;
    height: 18px;
  }
  
  .stat-divider { display: none; }
  
  .stat-item {
    padding: 0 var(--space-1);
  }
  
  .stat-label {
    font-size: 9px;
    letter-spacing: 0.04em;
  }
  
  .stat-value {
    font-size: var(--text-sm);
  }
  
  .hide-mobile { display: none !important; }
  .stat-item-chokepoint { display: none; }
  
  .btn-label { display: none; }
  
  .header-btn {
    padding: var(--space-1);
  }
  
  .connection-status .status-text { display: none; }
  
  .panel {
    width: 100%;
    left: 0;
    border-left: none;
    border-top: 1px solid var(--border-subtle);
    top: auto;
    bottom: 0;
    height: 60vh;
    transform: translateY(0);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }
  
  .panel.hidden {
    transform: translateY(100%);
  }
  
  #vessel-legend {
    bottom: 32px;
    left: var(--space-2);
    padding: var(--space-1) var(--space-2);
  }
  
  .legend-title { font-size: 9px; }
  .legend-item { font-size: 10px; }
  .legend-dot { width: 6px; height: 6px; }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface);
  border-radius: 3px;
}

/* --- Selection --- */
::selection {
  background: rgba(201,164,78,0.25);
  color: var(--text-primary);
}

/* --- Focus --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}