:root {
  --ink: #1d2a2a;
  --ink-soft: #4d5b5a;
  --paper: #f6f3ec;
  --card: #fffdf8;
  --line: #ddd6c8;
  --accent: #2f6f5e;
  --accent-soft: #e3efe9;
  --warn: #8a5a14;
  --warn-soft: #fbf1df;
  --radius: 14px;
  --max: 1040px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.85;
  font-size: 16px;
}
a { color: var(--accent); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); letter-spacing: .02em; }
.brand small { font-weight: 400; color: var(--ink-soft); margin-left: .5em; font-size: .8em; }
nav.site a { color: var(--ink-soft); text-decoration: none; margin-left: 1.2em; font-size: .9rem; }
nav.site a:hover { color: var(--accent); }

.status-bar {
  background: var(--warn-soft);
  color: var(--warn);
  text-align: center;
  font-size: .88rem;
  padding: 8px 12px;
  border-bottom: 1px solid #efdcb8;
}

.hero { padding-top: 72px; padding-bottom: 56px; }
.hero h1 { font-size: clamp(1.9rem, 4.4vw, 2.9rem); line-height: 1.35; margin: 0 0 .5em; letter-spacing: .02em; }
.hero p.lead { font-size: 1.1rem; color: var(--ink-soft); max-width: 40em; margin: 0 0 1.6em; }
.pill { display: inline-block; background: var(--accent-soft); color: var(--accent); border-radius: 999px; padding: 4px 14px; font-size: .85rem; font-weight: 600; margin-bottom: 1.2em; }
.cta { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 12px 26px; border-radius: 999px; font-weight: 600; }
.cta[aria-disabled="true"] { background: #9db5ad; cursor: default; }

section { padding: 56px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 1.5rem; margin: 0 0 1em; }
section h2 .num { color: var(--accent); font-size: .85em; margin-right: .5em; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: s; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.step::before { counter-increment: s; content: "STEP " counter(s); display: block; color: var(--accent); font-weight: 700; font-size: .8rem; letter-spacing: .1em; margin-bottom: .4em; }
.step h3 { margin: 0 0 .4em; font-size: 1.1rem; }
.step p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

.samples { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.sample { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin: 0; }
.sample img, .sample svg { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; background: #eef0ea; }
.sample figcaption { padding: 14px 18px 18px; }
.sample figcaption b { display: block; }
.sample figcaption span { color: var(--ink-soft); font-size: .9rem; }
.note { color: var(--ink-soft); font-size: .88rem; margin-top: 1em; }

.status-list { list-style: none; padding: 0; margin: 0; }
.status-list li { padding: 10px 0 10px 32px; position: relative; border-bottom: 1px dashed var(--line); }
.status-list li::before { position: absolute; left: 0; top: 10px; font-weight: 700; }
.status-list li.done::before { content: "✓"; color: var(--accent); }
.status-list li.wip::before { content: "…"; color: var(--warn); }
.status-list li.todo::before { content: "○"; color: var(--ink-soft); }

.caution { background: var(--warn-soft); border: 1px solid #efdcb8; border-radius: var(--radius); padding: 22px 26px; }
.caution ul { margin: 0; padding-left: 1.2em; }

.info-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: var(--radius); overflow: hidden; }
.info-table th, .info-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
.info-table th { width: 30%; color: var(--ink-soft); font-weight: 600; background: #faf7f0; }

.doc { padding-top: 48px; padding-bottom: 72px; }
.doc h1 { font-size: 1.8rem; }
.doc h2 { font-size: 1.2rem; margin-top: 2em; border-left: 4px solid var(--accent); padding-left: .6em; }
.doc .updated { color: var(--ink-soft); font-size: .9rem; }

footer.site { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--ink-soft); font-size: .88rem; background: var(--card); }
footer.site nav a { color: var(--ink-soft); margin-right: 1.2em; }

@media (max-width: 760px) {
  .steps, .samples { grid-template-columns: 1fr; }
  nav.site { display: none; }
  .hero { padding-top: 48px; padding-bottom: 40px; }
  .info-table th { width: 38%; }
}

.hero-note { margin-top: 1.2em; font-size: .85rem; color: var(--ink-soft); }
footer.site nav a { display: inline-block; margin-bottom: 4px; }