:root {
  --bg: #0b1419;
  --panel: #0f1d25;
  --panel-2: #13252f;
  --line: #1f3845;
  --ink: #e8f1f5;
  --ink-dim: #8ba4b3;
  --accent: #4cc9f0;
  --warn: #f4a261;
  --danger: #e76f51;
  --ok: #52b788;
  --chart-predicted: #6aa9c7;
  --chart-actual: #4cc9f0;
  --grid: #1a2f3a;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { filter: brightness(1.15); }

/* ---------- header + nav ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.brand .logo {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
}
.brand .tagline {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}
nav.main-nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
nav.main-nav a {
  padding: 8px 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  border: 1px solid transparent;
  border-radius: 3px;
}
nav.main-nav a:hover { color: var(--ink); border-color: var(--line); }
nav.main-nav a.active {
  color: var(--accent);
  border-color: var(--line);
  background: var(--panel-2);
}

/* ---------- main + controls ---------- */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 28px 60px;
}
.page-title {
  margin: 0 0 4px;
  font-size: 22px;
  letter-spacing: 0.04em;
  font-weight: 600;
}
.page-sub {
  color: var(--ink-dim);
  font-size: 13px;
  margin-bottom: 20px;
}
.controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.controls label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}
select, button, input[type="date"], input[type="text"] {
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 8px 12px;
  font-size: 14px;
  border-radius: 3px;
  font-family: inherit;
  cursor: pointer;
}
input[type="date"] { color-scheme: dark; cursor: text; }
button:hover, select:hover { border-color: var(--accent); }
button.primary {
  background: var(--accent);
  color: #082027;
  border-color: var(--accent);
  font-weight: 600;
}
button.primary:hover { filter: brightness(1.1); }

/* ---------- panels + cards ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 20px 22px;
  margin-bottom: 20px;
}
.panel h2 {
  margin: 0 0 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  font-weight: 600;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 16px 18px;
  border-radius: 4px;
}
.stat .label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  margin-bottom: 6px;
}
.stat .value {
  font-size: 28px;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.stat .unit {
  font-size: 13px;
  color: var(--ink-dim);
  margin-left: 4px;
}
.stat.delta .value.pos { color: var(--warn); }
.stat.delta .value.neg { color: var(--accent); }
.stat.delta .value.zero { color: var(--ok); }

.chart-wrap { position: relative; height: 380px; }

/* ---------- conditions row layout ---------- */
.conditions-row {
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.conditions-row:last-child { border-bottom: none; }
.conditions-row .metric-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
}
.conditions-row .metric-value {
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.conditions-row .metric-value .unit {
  font-size: 13px;
  color: var(--ink-dim);
  margin-left: 4px;
}
.conditions-row .metric-context {
  font-size: 12px;
  color: var(--ink-dim);
  max-width: 380px;
  line-height: 1.5;
}
@media (max-width: 720px) {
  .conditions-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .conditions-row .metric-context { max-width: none; }
}

/* ---------- compass / direction ---------- */
.compass {
  width: 64px;
  height: 64px;
  border: 2px solid var(--line);
  border-radius: 50%;
  position: relative;
  display: inline-block;
  vertical-align: middle;
  margin-right: 8px;
}
.compass::before {
  content: "N";
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 9px;
  color: var(--ink-dim);
}
.compass .arrow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 26px;
  background: var(--accent);
  transform-origin: 50% 100%;
  transform: translate(-50%, -100%) rotate(0deg);
  border-radius: 2px;
}
.compass .arrow::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-bottom: 8px solid var(--accent);
}

/* ---------- misc ---------- */
.muted { color: var(--ink-dim); font-size: 12px; }
.empty {
  padding: 60px 20px;
  text-align: center;
  color: var(--ink-dim);
  font-size: 14px;
}
.empty h3 { color: var(--ink); margin: 0 0 8px; font-weight: 500; font-size: 18px; }
.error {
  color: var(--danger);
  padding: 10px 14px;
  border: 1px solid var(--danger);
  border-radius: 3px;
  background: rgba(231, 111, 81, 0.08);
  margin-bottom: 16px;
}
.springs-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}
.spring-item {
  background: var(--panel-2);
  border: 1px solid var(--line);
  padding: 12px 14px;
  border-radius: 3px;
}
.spring-item .name {
  font-size: 12px;
  color: var(--ink-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}
.spring-item .temp {
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}
.spring-item .temp .unit { font-size: 12px; color: var(--ink-dim); margin-left: 3px; }
.updated {
  font-size: 12px;
  color: var(--ink-dim);
  font-variant-numeric: tabular-nums;
}