:root {
  color-scheme: dark;
  --bg: #07131f;
  --panel: rgba(9, 20, 34, 0.88);
  --panel-border: rgba(140, 215, 255, 0.22);
  --text: #eef8ff;
  --muted: #b7d1e2;
  --accent: #7ee2ff;
  --accent-2: #ffd36f;
  --success: #8ff0ba;
  --danger: #ff9d9d;
  --route: #ffcf88;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(71, 155, 201, 0.24), transparent 24%),
    linear-gradient(180deg, #0a1726, var(--bg));
}
button { font: inherit; }
.app {
  width: min(1120px, calc(100% - 24px));
  margin: 0 auto;
  padding: 18px 0 28px;
}
.topnav {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 18px;
}
.topnav a { color: inherit; text-decoration: none; }
.hero, .panel, .inset {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
}
.hero {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 22px;
  margin-bottom: 18px;
}
.eyebrow, .label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-size: 0.74rem;
  margin: 0 0 8px;
}
h1, h2, p { margin-top: 0; }
.subtitle { max-width: 60ch; color: var(--muted); margin-bottom: 0; }
.hero-actions, .chart-controls { display: flex; gap: 10px; align-items: center; }
.primary, .ghost, .mini {
  border-radius: 999px;
  border: 0;
  cursor: pointer;
}
.primary {
  background: linear-gradient(135deg, var(--accent), #4cb6ff);
  color: #072132;
  padding: 12px 18px;
  font-weight: 800;
}
.ghost, .mini {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.1);
}
.ghost { padding: 12px 18px; }
.mini { width: 36px; height: 36px; }
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.85fr);
  gap: 18px;
}
.panel { padding: 18px; }
.panel-head, .status-strip { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.legend, .status-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.92rem;
  margin: 14px 0;
}
.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-right: 6px;
}
.dot.start { background: var(--accent); }
.dot.cargo { background: var(--accent-2); }
.dot.harbor { background: var(--success); }
.dot.route { background: var(--route); }
.board {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}
.cell {
  position: relative;
  aspect-ratio: 1;
  border-radius: 18px;
  border: 1px solid rgba(126, 226, 255, 0.16);
  background: linear-gradient(180deg, rgba(19, 48, 76, 0.95), rgba(9, 25, 41, 0.95));
  color: var(--text);
  padding: 8px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.cell.current::after {
  content: attr(data-arrow);
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 1.9rem;
  color: rgba(126, 226, 255, 0.22);
}
.cell.route { box-shadow: inset 0 0 0 2px rgba(255, 207, 136, 0.75); }
.cell.crash { box-shadow: inset 0 0 0 2px rgba(255, 157, 157, 0.75); }
.marker, .step-tag, .buoy {
  position: relative;
  z-index: 1;
}
.marker {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.85rem;
}
.start-marker { background: rgba(126, 226, 255, 0.18); color: var(--accent); }
.cargo-marker { background: rgba(255, 211, 111, 0.18); color: var(--accent-2); }
.harbor-marker { background: rgba(143, 240, 186, 0.18); color: var(--success); }
.step-tag {
  align-self: flex-end;
  font-size: 0.75rem;
  padding: 3px 7px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
}
.buoy {
  position: absolute;
  right: 8px;
  top: 8px;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.08);
}
.buoy.port { color: #ffc58f; }
.buoy.starboard { color: #8fd5ff; }
.message { min-height: 24px; color: var(--muted); margin: 14px 0 0; }
.forecast-cards {
  display: grid;
  gap: 12px;
}
.forecast-card {
  padding: 12px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.04);
}
.forecast-card.active { border-color: rgba(126, 226, 255, 0.4); }
.mini-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
}
.mini-cell {
  aspect-ratio: 1;
  border-radius: 8px;
  background: rgba(10, 28, 45, 0.9);
  display: grid;
  place-items: center;
  color: rgba(238, 248, 255, 0.88);
  font-size: 0.9rem;
}
.tips {
  color: var(--muted);
  padding-left: 18px;
  margin-bottom: 0;
}
.inset { padding: 14px; margin-top: 14px; }
.summary {
  display: grid;
  gap: 10px;
  color: var(--muted);
}
.summary strong { color: var(--text); }
@media (max-width: 860px) {
  .hero, .layout { grid-template-columns: 1fr; display: grid; }
  .hero-actions { grid-auto-flow: row; }
}