:root {
  --bg: #ffffff; --soft: #f4f6f8; --text: #1c2430; --muted: #5d6b7c; --border: #dde2e8;
  --accent: #1f5f8b; --accent-text: #fff; --warn-bg: #fdf3dd;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #11151b; --soft: #1a2029; --text: #e6eaf0; --muted: #9aa7b6; --border: #2d3643; --accent: #5aa6d6; --accent-text: #0b1118; --warn-bg: #3a2f14; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 var(--font); }
a { color: var(--accent); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 1.25rem; }
header.site { border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; gap: 1.5rem; padding-top: 0.9rem; padding-bottom: 0.9rem; }
.brand { font-weight: 800; font-size: 1.25rem; color: var(--text); text-decoration: none; letter-spacing: -0.02em; }
header.site nav { display: flex; gap: 1.25rem; flex: 1; flex-wrap: wrap; }
header.site nav a { color: var(--muted); text-decoration: none; }
.button { display: inline-block; background: var(--accent); color: var(--accent-text); padding: 0.6rem 1.1rem; border-radius: 8px; text-decoration: none; font-weight: 600; }
.button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.hero { padding: 4rem 0 3rem; }
.hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); line-height: 1.15; margin: 0 0 1rem; max-width: 20ch; letter-spacing: -0.02em; }
.hero p.lead { font-size: 1.2rem; color: var(--muted); max-width: 60ch; }
.hero .ctas { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }
section.band { padding: 3rem 0; border-top: 1px solid var(--border); }
section.band.soft { background: var(--soft); }
h2 { font-size: 1.6rem; margin: 0 0 1rem; letter-spacing: -0.01em; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.25rem; }
.grid .item { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem; }
section.soft .grid .item { background: var(--bg); }
.item h3 { margin: 0 0 0.4rem; font-size: 1.1rem; }
.item p { margin: 0; color: var(--muted); }
ol.steps { padding-left: 1.2rem; }
ol.steps li { margin: 0.5rem 0; }
.note { background: var(--warn-bg); border-radius: 10px; padding: 1rem 1.25rem; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: 0.95rem; }
th, td { border-bottom: 1px solid var(--border); padding: 0.5rem 0.6rem; text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; }
code { font-family: ui-monospace, Consolas, monospace; font-size: 0.9em; }
.doc { padding: 2rem 0 4rem; }
.doc h1 { font-size: 2rem; }
.doc h2 { margin-top: 2.5rem; }
.doc .toc { background: var(--soft); border-radius: 10px; padding: 1rem 1.5rem; }
footer.site { border-top: 1px solid var(--border); padding: 2rem 0; color: var(--muted); font-size: 0.9rem; }
footer.site .wrap { display: flex; gap: 1.5rem; flex-wrap: wrap; }