:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-glow-1: rgba(56, 189, 248, 0.18);
  --bg-glow-2: rgba(245, 158, 11, 0.15);
  --panel: #121a2f;
  --panel-2: #17213b;
  --panel-border: rgba(255,255,255,0.08);
  --panel-bg: linear-gradient(180deg, rgba(255,255,255,0.055), rgba(255,255,255,0.025));
  --nav-bg: rgba(10, 16, 32, 0.72);
  --text: #edf2ff;
  --muted: #8fa0c4;
  --line: #273553;
  --power: #f59e0b;
  --pace: #38bdf8;
  --weather: #22c55e;
  --heart: #fb7185;
  --violet: #a78bfa;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.32);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f3f6fb;
  --bg-glow-1: rgba(14, 165, 233, 0.18);
  --bg-glow-2: rgba(245, 158, 11, 0.16);
  --panel: #ffffff;
  --panel-2: #eef3fb;
  --panel-border: rgba(20, 31, 55, 0.12);
  --panel-bg: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.72));
  --nav-bg: rgba(255, 255, 255, 0.76);
  --text: #0f172a;
  --muted: #64748b;
  --line: #d8e0ee;
  --power: #b45309;
  --pace: #0369a1;
  --weather: #15803d;
  --heart: #be123c;
  --violet: #6d28d9;
  --shadow: 0 18px 50px rgba(30, 41, 59, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, var(--bg-glow-1), transparent 34rem),
    radial-gradient(circle at 80% 10%, var(--bg-glow-2), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  padding: 12px 0;
  background: linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 84%, transparent) 72%, transparent 100%);
  backdrop-filter: blur(18px);
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1440px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 64px;
  padding: 10px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  background: var(--nav-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 16px;
  color: var(--bg);
  background: linear-gradient(135deg, var(--pace), var(--power));
  font-size: 0.85rem;
  font-weight: 950;
  letter-spacing: -0.05em;
}

.brand strong {
  display: block;
  color: var(--text);
  font-weight: 950;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.brand small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 750;
}

.nav-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 6px;
  align-items: center;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-2) 62%, transparent);
}

.nav-links a, .theme-toggle {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-weight: 800;
  text-decoration: none;
}

.nav-links a.active {
  color: var(--bg);
  background: var(--text);
}

.theme-toggle {
  cursor: pointer;
  border: 1px solid var(--line);
  color: var(--text);
  background: color-mix(in srgb, var(--panel-2) 82%, transparent);
}

.theme-toggle:hover, .nav-links a:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--panel-2) 88%, transparent);
}

.nav-links a.active:hover {
  color: var(--bg);
  background: var(--text);
}

.hero, main {
  width: min(1440px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: end;
  padding: 48px 0 28px;
}

h1, h2, p { margin: 0; }

h1 {
  max-width: 820px;
  font-size: clamp(2.4rem, 8vw, 5.8rem);
  line-height: 0.9;
  letter-spacing: -0.08em;
}

h2 {
  font-size: clamp(1.25rem, 3vw, 2rem);
  letter-spacing: -0.04em;
}

.eyebrow, .label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lede {
  margin-top: 18px;
  max-width: 680px;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-card, .metric-card, .panel {
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-card {
  min-width: 230px;
  padding: 20px;
  border-radius: 24px;
}

.hero-card strong, .metric-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.8rem;
  letter-spacing: -0.04em;
}

.back-link, .run-link {
  color: var(--pace);
  font-weight: 700;
  text-decoration: none;
}

.back-link {
  display: inline-block;
  margin: 0 12px 18px 0;
}

.run-hero h1 {
  font-size: clamp(2.2rem, 6vw, 4.8rem);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.metric-card {
  position: relative;
  overflow: hidden;
  min-height: 150px;
  padding: 22px;
  border-radius: 28px;
}

.metric-card::after {
  content: "";
  position: absolute;
  inset: auto -30px -55px auto;
  width: 130px;
  height: 130px;
  border-radius: 999px;
  opacity: 0.22;
}

.accent-power::after { background: var(--power); }
.accent-pace::after { background: var(--pace); }
.accent-weather::after { background: var(--weather); }
.accent-runs::after { background: var(--violet); }

.metric-card small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.dual-metric {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 12px;
}

.dual-metric strong {
  margin-top: 2px;
  font-size: clamp(1.7rem, 3vw, 2.35rem);
}

.dual-metric small {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.compact-grid {
  margin-top: 16px;
}

.mini-card {
  min-height: 110px;
}

.mini-card strong {
  font-size: 1.7rem;
}

.panel {
  margin-top: 18px;
  padding: 22px;
  border-radius: 30px;
}

.panel-header {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.panel-header.compact { margin-bottom: 12px; }

.segmented {
  display: inline-flex;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-2) 72%, transparent);
}

button, .search {
  color: var(--text);
  border: 0;
  font: inherit;
}

.period-button {
  cursor: pointer;
  padding: 9px 14px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
}

.period-button.active {
  background: var(--text);
  color: var(--bg);
}

.range-button {
  cursor: pointer;
  padding: 9px 13px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
}

.range-button.active {
  background: var(--text);
  color: var(--bg);
}

.segmented-wide {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th, td {
  padding: 13px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

td strong { color: var(--text); }
.muted { color: var(--muted); }
.power { color: var(--power); }
.pace { color: var(--pace); }
.weather { color: var(--weather); }

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

canvas {
  width: 100%;
  height: auto;
  border-radius: 20px;
  background: color-mix(in srgb, var(--panel-2) 62%, transparent);
}

.weather-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.narrative {
  display: grid;
  gap: 10px;
  color: var(--text);
  font-size: 1.04rem;
  line-height: 1.6;
}

.weather-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: color-mix(in srgb, var(--panel-2) 48%, transparent);
}

.weather-card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.5rem;
}

.search {
  width: min(360px, 100%);
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-2) 72%, transparent);
  outline: none;
}

@media (max-width: 1000px) {
  .hero, .panel-header { grid-template-columns: 1fr; }
  .hero { display: block; }
  .hero-card { margin-top: 22px; }
  .summary-grid, .charts-grid, .weather-grid, .detail-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
    padding: 10px 0 0;
  }
  .top-nav {
    width: min(100% - 20px, 1440px);
    align-items: stretch;
    flex-direction: column;
    gap: 10px;
    border-radius: 24px;
  }
  .brand small {
    display: none;
  }
  .nav-actions {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
  }
  .nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  .nav-links a, .theme-toggle {
    justify-content: center;
    padding: 9px 10px;
  }
  .hero, main { width: min(100% - 20px, 1440px); }
  .summary-grid, .charts-grid, .weather-grid, .detail-grid { grid-template-columns: 1fr; }
  .panel-header { flex-direction: column; align-items: stretch; }
  .segmented { justify-content: space-between; }
  .period-button { flex: 1; }
  .range-button { flex: 1 1 30%; }
  .dual-metric { grid-template-columns: 1fr; }
}