:root { --fg: #1f2933; --muted: #52606d; --bg: #f5f7fa; --card: #fff; --accent: #0b6e4f; --accent-soft: #e6f4ef; --warn: #8a4b08; --line: #d9e2ec; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Hiragino Sans", "Yu Gothic UI", sans-serif; color: var(--fg); background: var(--bg); line-height: 1.8; }
.pr-banner { background: #fff4e5; border-bottom: 1px solid #f0c78a; padding: 10px 16px; font-size: 0.9rem; }
.hero { background: linear-gradient(135deg, #0b6e4f 0%, #138a66 100%); color: #fff; }
.hero-inner { max-width: 760px; margin: 0 auto; padding: 32px 16px 28px; }
.hero h1 { font-size: 1.9rem; line-height: 1.35; margin: 4px 0 12px; }
.hero .lead { font-size: 1.02rem; }
.hero .notice, .hero .notice a { color: #d8efe6; }
.hero .primary { background: #fff; color: var(--accent); font-weight: 700; margin: 8px 0 12px; }
.eyebrow { display: inline-block; margin: 0; padding: 2px 10px; border: 1px solid rgba(255,255,255,.6); border-radius: 999px; font-size: 0.8rem; }
.site-header, main, .site-footer { max-width: 760px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.5rem; margin: 8px 0; }
h2 { font-size: 1.2rem; margin-top: 0; }
h3 { font-size: 1.05rem; margin: 18px 0 6px; }
.lead { margin: 0 0 8px; }
.notice, .small, .updated { font-size: 0.85rem; color: var(--muted); }
.breadcrumb { font-size: 0.85rem; margin: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px; margin: 16px 0; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0 0; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; text-align: center; font-size: 0.9rem; }
.step p { margin: 6px 0 0; }
.step-no { display: inline-flex; width: 28px; height: 28px; border-radius: 50%; background: var(--accent); color: #fff; align-items: center; justify-content: center; font-weight: 700; }
fieldset { border: 0; padding: 0; margin: 0 0 18px; }
legend { font-weight: 700; margin-bottom: 6px; }
label { display: block; padding: 8px 10px; margin: 4px 0; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; }
label:hover { background: var(--accent-soft); }
.primary { display: inline-block; background: var(--accent); color: #fff; border: 0; border-radius: 8px; padding: 12px 20px; font-size: 1rem; text-decoration: none; cursor: pointer; }
.primary.disabled, .primary:disabled { background: #9aa5b1; cursor: not-allowed; }
.error { color: #b42318; }
.emphasis { color: var(--warn); font-weight: 600; }
.hidden { display: none; }
.methods dt { font-weight: 700; margin-top: 10px; }
.methods dd { margin: 0 0 4px; }
.checklist { padding-left: 0; list-style: none; }
.checklist li { padding-left: 1.6em; position: relative; margin: 6px 0; }
.checklist li::before { content: "☐"; position: absolute; left: 0; color: var(--accent); }
.table-wrap { overflow-x: auto; }
.compare { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 560px; }
.compare th, .compare td { border: 1px solid var(--line); padding: 8px; vertical-align: top; text-align: left; }
.compare thead th { background: var(--accent-soft); }
.toc ol { margin: 0; padding-left: 1.4em; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details summary { font-weight: 700; cursor: pointer; }
.cta-card { text-align: center; background: var(--accent-soft); }
a { color: var(--accent); }
@media (max-width: 560px) {
  .hero h1 { font-size: 1.5rem; }
  .steps { grid-template-columns: 1fr; }
}