@import url("https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500;600&family=Noto+Serif+JP:wght@400;500&display=swap");

:root {
  --bg: #f5f1e8;
  --text: #222;
  --muted: #5f5a50;
  --accent: #6b5e4a;
  --line: #d8d0c2;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.85;
}

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

a:hover {
  text-decoration: underline;
}

main.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
  padding: 34px 0 70px;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.9rem);
  line-height: 1.25;
  margin: 0 0 14px;
  font-weight: 500;
}

h2 {
  font-size: clamp(1.2rem, 2.2vw, 1.8rem);
  margin: 0 0 10px;
  font-weight: 500;
}

h3 {
  font-size: 1.08rem;
  margin: 0 0 8px;
  font-weight: 500;
}

.card {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 88%, white 12%);
  padding: 20px;
  margin: 0 0 20px;
}

.stack > article {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.stack > article:first-of-type {
  border-top: 0;
  padding-top: 6px;
}

.note,
.label {
  color: var(--muted);
  font-size: 0.92rem;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-size: 0.82rem;
}

.search input {
  width: 100%;
  border: 1px solid var(--line);
  background: #fbf8f2;
  padding: 10px 12px;
  font: inherit;
}

.results {
  margin-top: 10px;
  color: var(--muted);
}

.refs {
  margin: 10px 0;
  padding: 12px;
  border: 1px solid var(--line);
  background: #fff;
}

.refs ul,
ul,
ol {
  margin: 8px 0;
  padding-left: 20px;
}

.diagram {
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: #fff;
  margin: 12px 0;
}

.diagram rect,
.diagram line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 1;
}

.diagram text {
  fill: var(--text);
  font-size: 14px;
}

.warning {
  color: #7a3d2a;
}

.next-steps,
.changelog,
.footer {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 89%, white 11%);
  padding: 18px;
}

.footer {
  margin-top: 24px;
}

@media (max-width: 768px) {
  main.container {
    width: 94vw;
  }

  .card {
    padding: 16px;
  }

  .diagram text {
    font-size: 12px;
  }
}