:root {
  /* Dark theme (default) */
  --bg: #0b0f17;
  --bg-2: #0f1623;
  --panel: #131c2c;
  --panel-2: #1a2438;
  --line: #1f2a40;
  --text: #e6ecf5;
  --text-dim: #8a9bb8;
  --muted: #5d6c87;
  --accent: #fbbf24;        /* solar yellow */
  --accent-2: #f97316;      /* sunset orange */
  --accent-soft: rgba(251, 191, 36, 0.12);
  --good: #34d399;
  --bad: #f87171;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  --topbar-bg: rgba(11, 15, 23, 0.7);
  --grid-line: rgba(31, 42, 64, 0.6);
  --tooltip-bg: rgba(11, 15, 23, 0.95);
  --bg-glow-1: rgba(251, 191, 36, 0.07);
  --bg-glow-2: rgba(249, 115, 22, 0.05);
  color-scheme: dark;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

/* Light theme: applies automatically via system preference … */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f5f7fb;
    --bg-2: #eef1f7;
    --panel: #ffffff;
    --panel-2: #fbfcfe;
    --line: #e3e8f0;
    --text: #0f172a;
    --text-dim: #475569;
    --muted: #94a3b8;
    --accent: #ea8a0c;
    --accent-2: #d6451a;
    --accent-soft: rgba(234, 138, 12, 0.10);
    --good: #059669;
    --bad: #dc2626;
    --shadow: 0 10px 30px rgba(15, 22, 36, 0.08);
    --topbar-bg: rgba(255, 255, 255, 0.75);
    --grid-line: rgba(15, 23, 42, 0.08);
    --tooltip-bg: rgba(255, 255, 255, 0.98);
    --bg-glow-1: rgba(234, 138, 12, 0.08);
    --bg-glow-2: rgba(214, 69, 26, 0.05);
    color-scheme: light;
  }
}

/* … or explicitly via [data-theme="light"] (user override) */
:root[data-theme="light"] {
  --bg: #f5f7fb;
  --bg-2: #eef1f7;
  --panel: #ffffff;
  --panel-2: #fbfcfe;
  --line: #e3e8f0;
  --text: #0f172a;
  --text-dim: #475569;
  --muted: #94a3b8;
  --accent: #ea8a0c;
  --accent-2: #d6451a;
  --accent-soft: rgba(234, 138, 12, 0.10);
  --good: #059669;
  --bad: #dc2626;
  --shadow: 0 10px 30px rgba(15, 22, 36, 0.08);
  --topbar-bg: rgba(255, 255, 255, 0.75);
  --grid-line: rgba(15, 23, 42, 0.08);
  --tooltip-bg: rgba(255, 255, 255, 0.98);
  --bg-glow-1: rgba(234, 138, 12, 0.08);
  --bg-glow-2: rgba(214, 69, 26, 0.05);
  color-scheme: light;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 80% -10%, var(--bg-glow-1), transparent 60%),
    radial-gradient(900px 600px at -10% 30%, var(--bg-glow-2), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
code { background: var(--panel); padding: 2px 6px; border-radius: 6px; font-size: 12px; }

/* Top bar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(10px);
  background: var(--topbar-bg);
}

.brand { display: flex; gap: 14px; align-items: center; }
.logo {
  width: 38px; height: 38px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fde68a, var(--accent) 55%, var(--accent-2) 100%);
  box-shadow: 0 0 0 6px var(--accent-soft), 0 0 24px rgba(251, 191, 36, 0.35);
}
.brand-title { font-weight: 600; font-size: 16px; letter-spacing: 0.2px; }
.brand-sub { font-size: 12px; color: var(--text-dim); }

.topbar-meta {
  display: flex;
  align-items: center;
  gap: 14px;
}
.topbar-text { text-align: right; font-size: 12px; }
.meta-row { display: flex; align-items: center; gap: 8px; justify-content: flex-end; }
.muted { color: var(--muted); }
.dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--muted);
  box-shadow: 0 0 0 4px rgba(93, 108, 135, 0.15);
}
.dot.ok { background: var(--good); box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.18); }
.dot.warn { background: var(--accent); box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.18); }
.dot.err { background: var(--bad); box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.18); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--accent); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-toggle svg { width: 18px; height: 18px; }

/* Layout */
main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px;
  display: grid;
  gap: 22px;
}

.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 22px;
}
.hero-now {
  padding: 28px;
  background:
    radial-gradient(600px 250px at 80% -30%, var(--accent-soft), transparent 70%),
    linear-gradient(180deg, var(--panel), var(--panel-2));
}
.card-label, .stat-label { color: var(--text-dim); font-size: 12px; letter-spacing: 0.4px; text-transform: uppercase; }
.now-value {
  margin-top: 8px;
  font-size: clamp(48px, 8vw, 88px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.now-value .unit { font-size: 20px; color: var(--text-dim); font-weight: 500; }
.now-bar {
  margin-top: 22px;
  background: var(--bg-2);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.now-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.6s ease;
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.5);
}
.now-sub {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 14px; font-size: 13px; color: var(--text-dim);
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.stat { padding: 18px 20px; }
.stat-value {
  margin-top: 8px;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.5px;
  display: flex; align-items: baseline; gap: 6px;
}
.stat-value .unit { font-size: 12px; color: var(--text-dim); font-weight: 500; }

/* Charts */
.chart-card { padding: 22px 22px 12px; }
.chart-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.chart-head h2 { font-size: 15px; margin: 0 0 4px; font-weight: 600; }
.chart-head p { margin: 0; font-size: 12px; }
.chart-wrap { position: relative; height: 280px; }

/* Detail */
.wr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}
.wr {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.wr-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.wr-name { font-weight: 600; font-size: 14px; letter-spacing: 0.1px; }
.wr-status { display: flex; gap: 6px; align-items: center; color: var(--text-dim); font-size: 12px; }
.wr-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}
.kv {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.kv .k { color: var(--text-dim); font-size: 11px; letter-spacing: 0.3px; text-transform: uppercase; }
.kv .v { font-size: 20px; font-weight: 600; margin-top: 6px; display: flex; align-items: baseline; gap: 5px; }
.kv .v .unit { font-size: 12px; color: var(--text-dim); font-weight: 500; }

.foot { text-align: center; font-size: 12px; padding: 12px 0 24px; }

/* Responsive */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  main { padding: 18px; gap: 16px; }
  .topbar { padding: 16px 18px; }
}
@media (max-width: 480px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .chart-wrap { height: 220px; }
  .topbar-meta { gap: 8px; }
}