:root {
  --color-bg: #0d1117;
  --color-bg-raised: #161b22;
  --color-text: #e6edf3;
  --color-accent: #ff6b35;
  --color-cyan: #22d3ee;
  --color-green: #4ade80;
  --color-orange: #ff8c42;
  --color-muted: #8b949e;
  --color-border: #21262d;

  /* Metric <-> color mapping, kept consistent with the Streamlit Engine's
     own charts: VPI (climb) cyan, DMI (descent) orange, ER (endurance) green. */
  --color-vpi: var(--color-cyan);
  --color-dmi: var(--color-orange);
  --color-er: var(--color-green);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.metric-vpi { color: var(--color-vpi) !important; }
.metric-dmi { color: var(--color-dmi) !important; }
.metric-er { color: var(--color-er) !important; }

/* --- Header --- */
.site-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
  padding: 1.5rem 1.5rem 1.1rem;
  border-bottom: 1px solid var(--color-border);
}

.site-header .logo {
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.site-header .logo .logo-trail { color: var(--color-green); }

.main-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.main-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  transition: border-color 0.15s ease, color 0.15s ease;
}
.main-nav a:hover { color: var(--color-cyan); border-color: var(--color-cyan); }

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}
.lang-switcher a { color: var(--color-muted); text-decoration: none; font-weight: 600; }
.lang-switcher a.active { color: var(--color-green); }
.lang-switcher a:hover { color: var(--color-cyan); }
.lang-sep { color: var(--color-border); }

/* --- Layout --- */
main { max-width: 980px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }

.breadcrumb { color: var(--color-muted); font-size: 0.85rem; margin-bottom: 1rem; }
.breadcrumb a { color: var(--color-muted); }

/* --- Hero / homepage --- */
.hero { padding: 2.5rem 0 1.5rem; border-bottom: 1px solid var(--color-border); margin-bottom: 2rem; text-align: center; }
.hero h1 { font-size: 2.4rem; margin: 0 0 0.25rem; letter-spacing: -0.02em; }
.hero .tagline { color: var(--color-accent); font-weight: 600; margin: 0 0 1rem; }
.hero-sub { color: var(--color-muted); max-width: 62ch; margin-left: auto; margin-right: auto; }

.section-heading { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 1rem; }
.section-heading .see-all { font-size: 0.85rem; }

/* --- Cards / grids --- */
.race-grid, .athlete-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}

.race-card a, .athlete-card a {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg-raised);
  text-decoration: none;
  color: var(--color-text);
  height: 100%;
  transition: border-color 0.15s ease;
}
.race-card a:hover, .athlete-card a:hover { border-color: var(--color-cyan); }

.race-card img, .athlete-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: 6px;
  margin-bottom: 0.5rem;
  background: #000;
}
.athlete-card img { aspect-ratio: 1 / 1; }

.race-card-name, .athlete-card-name { font-weight: 700; }
.race-card-meta, .athlete-card-meta { color: var(--color-muted); font-size: 0.85rem; }

/* --- Race / athlete detail pages --- */
.race-hero, .elevation-profile {
  width: 100%;
  border-radius: 10px;
  margin-bottom: 1rem;
  background: #000;
}
.race-meta { color: var(--color-muted); margin-top: -0.5rem; }

.athlete-header { display: flex; align-items: center; gap: 1.25rem; margin-bottom: 1.5rem; }
.athlete-portrait {
  width: 96px; height: 96px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--color-border);
}
.athlete-meta { color: var(--color-muted); margin: 0.15rem 0 0; }

.stats-list { list-style: none; padding: 0; display: flex; gap: 2rem; margin: 1rem 0 2rem; }
.stats-list li { display: flex; flex-direction: column; }
.stat-label { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-value { font-size: 1.6rem; font-weight: 700; }

.metric-note { color: var(--color-muted); font-size: 0.85rem; margin-top: 1rem; }

/* --- Tables --- */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; min-width: 480px; }
th, td { text-align: left; padding: 0.55rem 0.6rem; border-bottom: 1px solid var(--color-border); }
th { color: var(--color-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
th.metric-vpi, th.metric-dmi, th.metric-er { font-weight: 700; }
tbody tr:hover { background: var(--color-bg-raised); }

/* --- Rankings --- */
.rankings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2rem; margin-top: 1.5rem; }
.rankings-grid h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: 0.04em; }
.ranking-list { list-style: none; padding: 0; margin: 0; counter-reset: rank; }
.ranking-list li {
  counter-increment: rank;
  display: flex; justify-content: space-between;
  padding: 0.5rem 0; border-bottom: 1px solid var(--color-border);
}
.ranking-list li::before {
  content: counter(rank) ".";
  color: var(--color-muted);
  margin-right: 0.5rem;
}
.ranking-list li span { color: var(--color-muted); font-variant-numeric: tabular-nums; }
.ranking-vpi { border-top: 2px solid var(--color-vpi); padding-top: 0.5rem; }
.ranking-dmi { border-top: 2px solid var(--color-dmi); padding-top: 0.5rem; }
.ranking-er { border-top: 2px solid var(--color-er); padding-top: 0.5rem; }

/* --- About / methodology --- */
.about-page .formula {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  overflow-x: auto;
}

.metric-accordion {
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-border);
  border-radius: 8px;
  margin: 1rem 0;
  background: var(--color-bg-raised);
  overflow: hidden;
}
.metric-accordion.metric-vpi { border-left-color: var(--color-vpi); }
.metric-accordion.metric-dmi { border-left-color: var(--color-dmi); }
.metric-accordion.metric-er { border-left-color: var(--color-er); }

.metric-accordion summary {
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-text);
  list-style: none;
}
.metric-accordion summary::-webkit-details-marker { display: none; }
.metric-accordion summary::after {
  content: "+";
  float: right;
  color: var(--color-muted);
  font-weight: 400;
}
.metric-accordion[open] summary::after { content: "−"; }
.metric-accordion-body { padding: 0 1.25rem 1.25rem; }
.metric-accordion-body p { margin: 0 0 0.75rem; }

/* --- Search --- */
.search-page input[type="search"] {
  width: 100%;
  font-size: 1.1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-raised);
  color: var(--color-text);
  margin: 1rem 0;
}
.search-results { list-style: none; padding: 0; }
.search-results li { padding: 0.6rem 0; border-bottom: 1px solid var(--color-border); }
.search-results .tag {
  color: var(--color-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  margin-left: 0.5rem;
}

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: 2rem;
  color: var(--color-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}
.site-footer-sub { margin: 0.25rem 0 0; font-size: 0.75rem; }

@media (max-width: 600px) {
  .hero h1 { font-size: 1.8rem; }
  .stats-list { gap: 1.25rem; }
}