@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,400;8..60,600;8..60,700&family=Caveat:wght@500;700&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

:root {
  --wall: #f4eee1;
  --wall-shadow: #e7dcc4;
  --wood: #7a4f2c;
  --wood-dark: #5a3a1f;
  --ink: #2c2620;
  --ink-dim: #6b6153;
  --ink-faint: #948a79;
  --pencil: #443c31;
  --a-color: #b6482f;
  --a-tint: #f0d9cf;
  --b-color: #24476b;
  --b-tint: #d6e0e9;
  --rule: #d8cdb4;
  --panel: #fffdf8;
  --accent: #a3742f;
  --focus: #1a5fb4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--wall);
  color: var(--ink);
  font-family: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  font-size: 18px;
  line-height: 1.65;
  background-image:
    repeating-linear-gradient(90deg, rgba(122,79,44,0.028) 0px, rgba(122,79,44,0.028) 1px, transparent 1px, transparent 68px);
}

a { color: var(--wood-dark); }
a:hover { color: var(--a-color); }
a:focus-visible, button:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 760px;
  margin: 0 auto;
  padding: 22px 20px 0;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
}
.topbar a { text-decoration: none; color: var(--ink-dim); }
.lang-switch { display: flex; gap: 10px; align-items: center; }
.lang-switch .current { color: var(--ink); font-weight: 600; }
.lang-switch a { text-decoration: underline; }

.wrap { max-width: 760px; margin: 0 auto; padding: 24px 20px 80px; }

.hero { padding: 28px 0 8px; }
.kicker {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}
h1 {
  font-size: 42px;
  line-height: 1.12;
  margin: 0 0 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.deck {
  font-size: 20px;
  line-height: 1.55;
  color: var(--ink-dim);
  margin: 0 0 8px;
  max-width: 66ch;
}

h2 {
  font-size: 26px;
  margin: 52px 0 16px;
  display: flex;
  align-items: baseline;
  gap: 12px;
  color: var(--ink);
}
h2 .num {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  border: 1.5px solid var(--accent);
  border-radius: 999px;
  padding: 3px 9px;
  letter-spacing: 0.02em;
}

p { margin: 0 0 16px; }
p.dim { color: var(--ink-dim); }
strong { color: var(--ink); }

.limits {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 18px;
  margin: 20px 0;
  color: var(--ink-dim);
  font-size: 16px;
}
.limits p { margin: 0; }

.method {
  font-size: 15px;
  color: var(--ink-faint);
  border-top: 1px solid var(--rule);
  padding-top: 18px;
  margin-top: 40px;
}

footer {
  margin-top: 50px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  display: flex;
  justify-content: space-between;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  color: var(--ink-faint);
}
footer a { color: var(--ink-dim); }

/* ---------- growth wall panel ---------- */

.wall-frame {
  display: none;
  background: linear-gradient(180deg, var(--wood) 0%, var(--wood-dark) 100%);
  border-radius: 14px;
  padding: 10px;
  margin: 20px 0 6px;
  box-shadow: 0 10px 26px -14px rgba(44,38,32,0.55);
}
.wall-frame.is-ready { display: block; }

.wall-panel {
  background: var(--panel);
  border-radius: 8px;
  padding: 20px 18px 16px;
  background-image: repeating-linear-gradient(180deg, rgba(122,79,44,0.05) 0, rgba(122,79,44,0.05) 1px, transparent 1px, transparent 46px);
}

.wall-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  margin-bottom: 6px;
}
.wall-controls .field { display: flex; align-items: center; gap: 8px; }
.wall-controls label { color: var(--ink-dim); font-weight: 500; }
.wall-controls select {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1.5px solid var(--rule);
  background: #fff;
  color: var(--ink);
  max-width: 190px;
}
.wall-controls select.a-select { border-color: var(--a-color); }
.wall-controls select.b-select { border-color: var(--b-color); }

.sex-toggle {
  display: inline-flex;
  border: 1.5px solid var(--rule);
  border-radius: 999px;
  overflow: hidden;
  margin-left: auto;
}
.sex-toggle button {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  font-weight: 600;
  border: none;
  background: #fff;
  color: var(--ink-dim);
  padding: 6px 14px;
  cursor: pointer;
}
.sex-toggle button.active { background: var(--wood); color: #fff; }

.wall-svg-wrap { width: 100%; overflow: visible; }
.wall-svg-wrap svg { width: 100%; height: auto; display: block; }

.wall-legend {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  margin: 8px 2px 2px;
  color: var(--ink-dim);
}
.wall-legend .swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  margin-right: 6px;
  vertical-align: -1px;
}
.wall-legend .a .swatch { background: var(--a-color); }
.wall-legend .b .swatch { background: var(--b-color); }

.wall-readout {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
  color: var(--ink);
  background: var(--wall-shadow);
  border-radius: 8px;
  padding: 12px 16px;
  margin: 14px 0 4px;
}
.wall-readout b { color: var(--ink); }

.noscript-note { display: none; }
noscript .noscript-note { display: block; color: var(--ink-dim); font-size: 15px; margin: 20px 0; }

/* ---------- ranking figure ---------- */

.rank-figure {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 16px 18px;
  margin: 20px 0;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 15px;
}
.rank-row { display: flex; align-items: center; gap: 10px; margin: 7px 0; }
.rank-row .name { width: 168px; flex-shrink: 0; color: var(--ink-dim); }
.rank-row.highlight .name { color: var(--ink); font-weight: 600; }
.rank-bar-track { flex: 1; background: var(--rule); border-radius: 4px; height: 12px; overflow: hidden; }
.rank-bar-fill { height: 100%; background: var(--ink-faint); border-radius: 4px; }
.rank-row.highlight .rank-bar-fill { background: var(--a-color); }
.rank-value { width: 72px; flex-shrink: 0; white-space: nowrap; text-align: right; color: var(--ink-dim); font-variant-numeric: tabular-nums; }
.rank-row.highlight .rank-value { color: var(--ink); font-weight: 600; }

@media (max-width: 480px) {
  h1 { font-size: 32px; }
  .deck { font-size: 18px; }
  .wall-controls { flex-direction: column; align-items: stretch; }
  .sex-toggle { margin-left: 0; align-self: flex-start; }
  .rank-row .name { width: 108px; font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}