@import url("tokens.css");

/* ---- semantic tokens (light default, dark override) ---- */
:root {
  --bg: var(--wtn-ivory);
  --fg: var(--wtn-ink);
  --muted: #55575E;
  --accent: var(--wtn-edge);
  --surface: #FFFFFF;
  --hairline: var(--wtn-hairline);
  --code-bg: rgba(23, 24, 28, 0.05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--wtn-bg-dark);
    --fg: var(--wtn-ivory);
    --muted: #A9A9B2;
    --accent: var(--wtn-edge-dark);
    --surface: #17181C;
    --hairline: #2A2A30;
    --code-bg: rgba(243, 241, 236, 0.08);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--wtn-font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 1.5rem; }

h1, h2, h3 {
  font-family: var(--wtn-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }

.label {
  font-family: var(--wtn-font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  color: var(--muted);
}

p { margin: 0 0 1em; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 42em; }

/* ---- header ---- */
header.site {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--hairline);
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--fg); }
.brand svg { width: 28px; height: 28px; flex: none; }
.brand span { font-family: var(--wtn-font-display); font-weight: 700; font-size: 1.1rem; }
.brand span em { font-style: normal; color: var(--accent); }
nav.site-links { display: flex; gap: 1.5rem; font-family: var(--wtn-font-mono); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; }
nav.site-links a { color: var(--fg); text-decoration: none; }
nav.site-links a:hover { color: var(--accent); }

/* ---- hero ---- */
.hero { padding: 5rem 0 4rem; text-align: center; }
.hero .mark-hero { width: 84px; height: 84px; margin: 0 auto 1.5rem; }
.hero h1 { margin: 0 auto 0.6em; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { margin: 0 auto 2.25rem; }

.cta-row { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; align-items: center; }
.store-badge {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font: inherit; font-family: var(--wtn-font-mono); font-size: 0.85rem; letter-spacing: 0.04em;
  padding: 0.75rem 1.25rem; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--hairline);
  color: var(--muted); text-decoration: none;
  appearance: none;
}
.store-badge:disabled { cursor: not-allowed; opacity: 0.85; }
.store-badge strong { color: var(--fg); font-family: var(--wtn-font-body); font-size: 0.95rem; display: block; }
.store-badge .icon { font-size: 1.3rem; line-height: 1; }

/* ---- sections ---- */
section { padding: 4rem 0; border-top: 1px solid var(--hairline); }
section > .wrap > .label { display: block; margin-bottom: 0.75rem; }
section h2 { max-width: 34em; }
section .lede { margin-bottom: 2.5rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 1.5rem;
}
.card h3 { margin-bottom: 0.4em; }
.card p { color: var(--muted); margin: 0; font-size: 0.95rem; }

.method-list { display: grid; gap: 1.25rem; }
.method-item { display: grid; grid-template-columns: minmax(140px, 200px) 1fr; gap: 1.5rem; }
.method-item dt { font-family: var(--wtn-font-mono); font-size: 0.85rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }
.method-item dd { margin: 0; }

/* ---- evidence / backtest ---- */
.evidence-callout {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}
table.backtest { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-variant-numeric: tabular-nums; }
table.backtest th, table.backtest td {
  text-align: left; padding: 0.6rem 0.75rem; border-bottom: 1px solid var(--hairline);
  font-family: var(--wtn-font-mono); font-size: 0.9rem;
}
table.backtest th { color: var(--muted); font-weight: 500; text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.75rem; }
table.backtest td.hero-num { font-size: 1.05rem; color: var(--accent); font-weight: 500; }
.evidence-caveat {
  border-left: 3px solid var(--accent);
  padding: 0.25rem 0 0.25rem 1.25rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.evidence-caveat strong { color: var(--fg); }
.source-note { font-family: var(--wtn-font-mono); font-size: 0.8rem; color: var(--muted); margin-top: 1rem; }
.source-note code { background: var(--code-bg); padding: 0.1em 0.4em; border-radius: 4px; }

.no-claim {
  border: 1px dashed var(--hairline);
  border-radius: 14px;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.no-claim h4 { margin: 0 0 0.75em; font-size: inherit; color: var(--fg); }

/* ---- attribution / disclaimer ---- */
.disclaimer { font-size: 0.9rem; color: var(--muted); max-width: 46em; }
.attribution-list { list-style: none; margin: 0 0 1.5rem; padding: 0; color: var(--muted); font-size: 0.9rem; }
.attribution-list li { margin-bottom: 0.4em; }

/* ---- footer ---- */
footer.site {
  border-top: 1px solid var(--hairline);
  padding: 2.5rem 0;
  font-family: var(--wtn-font-mono);
  font-size: 0.85rem;
  color: var(--muted);
}
footer.site .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
footer.site nav { display: flex; gap: 1.25rem; }
footer.site a { color: var(--muted); text-decoration: none; }
footer.site a:hover { color: var(--accent); }

@media (max-width: 640px) {
  header.site .wrap { flex-direction: column; gap: 1rem; }
  .method-item { grid-template-columns: 1fr; gap: 0.35rem; }
  footer.site .wrap { flex-direction: column; align-items: flex-start; }
}