:root {
  --bg-primary: #070d18;
  --bg-surface: #0e1726;
  --bg-surface-elevated: #142033;
  --border: rgba(255, 255, 255, 0.1);
  --border-focus: #8A1538;
  --text-primary: #f0f4f8;
  --text-secondary: #8fa3bf;
  --text-muted: #536b88;
  --qatar-maroon: #8A1538;
  --qatar-gold: #D4AF37;
  --accent-cyan: #00e5ff;
  --accent-green: #00e676;
  --accent-amber: #ffab00;
  --accent-red: #ff3d71;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  padding: 24px;
}

.tracker-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.tracker-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
}

.tracker-title h1 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 12px;
}

.tracker-title p {
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: 4px;
}

/* KPIs */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--qatar-maroon), var(--qatar-gold));
}

.kpi-card .label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.kpi-card .value {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 6px;
}

.kpi-card .subtext {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Controls */
.controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 18px;
}

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

.btn-filter {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-filter.active, .btn-filter:hover {
  background: var(--qatar-maroon);
  color: #ffffff;
  border-color: var(--qatar-gold);
}

/* Fleet Grid */
.fleet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.vessel-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.vessel-card:hover {
  border-color: var(--qatar-gold);
  transform: translateY(-2px);
}

.vessel-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.vessel-card-header strong {
  font-size: 16px;
  color: #ffffff;
}

.vessel-card-header .badge-class {
  font-size: 11px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(212, 175, 55, 0.15);
  color: var(--qatar-gold);
  border: 1px solid var(--qatar-gold);
}

.vessel-status-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  width: fit-content;
}

.status-underway {
  background: rgba(0, 230, 118, 0.15);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}

.status-hormuz {
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
}

.status-moored {
  background: rgba(255, 171, 0, 0.15);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber);
}

.vessel-telemetry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  background: var(--bg-surface-elevated);
  padding: 10px;
  border-radius: 8px;
  font-size: 12px;
}

.vessel-telemetry-grid div span {
  color: var(--text-muted);
  display: block;
  font-size: 10px;
  text-transform: uppercase;
}

.vessel-telemetry-grid div strong {
  color: var(--text-primary);
  font-size: 12px;
}

@media (max-width: 1024px) {
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .kpi-grid {
    grid-template-columns: 1fr;
  }
}