:root {
  --bg-0: #061620;
  --bg-1: #0c2230;
  --bg-2: #133246;
  --panel: rgba(18, 40, 54, 0.72);
  --panel-border: rgba(120, 200, 220, 0.12);
  --fg: #eaf4f8;
  --muted: #8aa9b6;
  --muted-2: #6a8a98;
  --accent: #5fd4d0;
  --accent-2: #7ab8ff;
  --warn: #f0b86e;
  --cool: #6fb7e8;
  --danger: #e07b7b;
  --max-width: 880px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: radial-gradient(ellipse at top, var(--bg-2) 0%, var(--bg-1) 35%, var(--bg-0) 100%);
  color: var(--fg);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle ripple/wave overlay */
.ripple-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 20% 0%, rgba(95, 212, 208, 0.08), transparent 40%),
    radial-gradient(circle at 80% 30%, rgba(122, 184, 255, 0.06), transparent 50%),
    radial-gradient(circle at 50% 100%, rgba(95, 212, 208, 0.05), transparent 60%);
}

main {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 64px;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 36px;
}
header h1 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 500;
  font-size: clamp(38px, 7vw, 64px);
  margin: 0 0 10px;
  letter-spacing: -1.5px;
  line-height: 1.02;
}
#subtitle {
  font-family: 'Inter', sans-serif;
  font-size: clamp(18px, 2.6vw, 22px);
  font-weight: 500;
  color: var(--fg);
  margin: 0 0 8px;
  letter-spacing: 0.1px;
}
#probe-tag {
  margin: 0;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  font-weight: 600;
}
.muted { color: var(--muted); font-size: 14px; }
.muted-2 { color: var(--muted-2); }

/* Card chrome */
.card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.03) inset, 0 16px 40px -24px rgba(0, 0, 0, 0.6);
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 36px 32px;
  margin-bottom: 36px;
}
.hero-current { text-align: left; }
.temp {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 300;
  font-size: clamp(80px, 14vw, 128px);
  line-height: 0.95;
  color: var(--accent);
  letter-spacing: -4px;
  font-variant-numeric: tabular-nums;
}
.temp::after {
  content: "°F";
  font-size: 0.32em;
  vertical-align: top;
  margin-left: 6px;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 0;
}
.current-meta-line {
  margin-top: 12px;
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: baseline;
  gap: 6px;
  flex-wrap: wrap;
}
.meta-label {
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted-2);
}
#current-when { font-weight: 500; color: var(--fg); font-variant-numeric: tabular-nums; }
#current-age { font-size: 13px; }
.badge {
  display: inline-block;
  margin-top: 14px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.badge--offline { background: var(--danger); color: #1a0a0a; }
.hidden { display: none !important; }

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 18px;
  align-content: center;
}
.hero-stats .stat:nth-child(3) { grid-column: 1 / -1; }
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 12px;
}
.stat-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--muted);
  font-weight: 600;
}
.stat-value {
  font-family: 'Fraunces', Georgia, serif;
  font-size: 28px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
  color: var(--fg);
}
.stat-value--up { color: var(--warn); }
.stat-value--down { color: var(--cool); }
.stat-help {
  font-size: 11px;
  color: var(--muted-2);
  line-height: 1.35;
  margin-top: 2px;
}

/* Charts */
.charts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.chart-card {
  padding: 20px 22px 18px;
}
.chart-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.chart-head h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;
  color: var(--fg);
}
.chart-meta {
  font-size: 12px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.chart-wrap {
  position: relative;
  height: 200px;
}

/* Footer */
footer {
  margin-top: 32px;
  text-align: center;
  font-size: 12px;
}

/* Responsive */
@media (max-width: 640px) {
  main { padding: 32px 16px 48px; }
  .hero {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 28px 22px;
    text-align: center;
  }
  .hero-current { text-align: center; }
  .temp { letter-spacing: -3px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats .stat:nth-child(3) { grid-column: 1 / -1; }
  .chart-wrap { height: 180px; }
  .chart-card { padding: 16px 14px 14px; }
  .chart-head { flex-direction: column; align-items: flex-start; gap: 2px; }
  .chart-head h2 { font-size: 14px; }
  .chart-meta { font-size: 11px; }
}