:root {
  color-scheme: light;
  --background: #f4f1e9;
  --surface: #fffdf8;
  --surface-soft: #ebe7dc;
  --text: #20251f;
  --muted: #666d64;
  --line: #dcd7cb;
  --accent: #315c4f;
  --accent-soft: #e3ebe6;
  --shadow: 0 16px 44px rgba(38, 43, 35, 0.09);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 2%, rgba(190, 160, 88, 0.11), transparent 28rem),
    var(--background);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  line-height: 1.7;
}

.page {
  width: min(960px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3.4rem 0 5rem;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.kicker::before { width: 1.8rem; height: 1px; background: currentColor; content: ""; }

h1 {
  margin: 0.8rem 0 0.6rem;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.lede { max-width: 62ch; margin: 0 0 2.4rem; color: var(--muted); }

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin: 3rem 0 1.1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
}
.section-heading h2 {
  margin: 0;
  font-family: Georgia, "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.section-heading p { margin: 0; color: var(--muted); font-size: 0.86rem; }

.doc-grid { display: grid; gap: 1.1rem; }

.doc-card {
  display: block;
  padding: 1.5rem 1.7rem;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow);
  color: inherit;
  text-decoration: none;
  transition: transform .18s ease, box-shadow .18s ease;
}
.doc-card:hover { transform: translateY(-2px); box-shadow: 0 20px 48px rgba(38,43,35,.14); }
.doc-card .eyebrow {
  color: var(--accent); font-size: .7rem; font-weight: 800;
  letter-spacing: .12em; text-transform: uppercase;
}
.doc-card h3 {
  margin: .35rem 0 .5rem;
  font-size: 1.24rem; font-weight: 700; letter-spacing: -.01em;
}
.doc-card p { margin: 0 0 .8rem; color: var(--muted); font-size: .93rem; }
.doc-meta { display: flex; flex-wrap: wrap; gap: .5rem; }
.tag {
  padding: .16rem .6rem; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-size: .74rem; font-weight: 700;
}
.tag.plain { background: var(--surface-soft); color: var(--muted); }

.note {
  margin-top: 1.2rem; padding: 1.1rem 1.4rem;
  border: 1px dashed var(--line); border-radius: 10px;
  background: rgba(255,253,248,.6);
  color: var(--muted); font-size: .9rem;
}
.note strong { color: var(--text); }

.backlink {
  display: inline-flex; align-items: center; gap: .4rem;
  color: var(--accent); font-size: .85rem; font-weight: 700; text-decoration: none;
}
.backlink:hover { text-decoration: underline; }

footer {
  margin-top: 4rem; padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: .82rem;
}

/* プロンプト表示用 */
.promptbox {
  position: relative;
  margin: 0 0 1.4rem;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fffdf8; box-shadow: var(--shadow);
}
.promptbox pre {
  margin: 0; padding: 1.5rem 1.6rem;
  overflow-x: auto;
  font-family: Consolas, "Courier New", "Yu Gothic UI", monospace;
  font-size: .82rem; line-height: 1.65; white-space: pre-wrap; word-break: break-word;
}
.copybar {
  display: flex; gap: .6rem; align-items: center;
  padding: .7rem 1.6rem; border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
  border-radius: 10px 10px 0 0;
}
.copybtn {
  padding: .35rem .95rem; border: 1px solid var(--accent); border-radius: 999px;
  background: var(--accent); color: #fff;
  font: inherit; font-size: .8rem; font-weight: 700; cursor: pointer;
}
.copybtn:hover { opacity: .88; }
.copybar span { color: var(--muted); font-size: .78rem; }

@media (max-width: 640px) {
  .page { padding-top: 2.4rem; }
  .doc-card { padding: 1.2rem 1.2rem; }
}