/* SinBot website: one simple dark theme, no outside fonts or scripts. */
:root {
  --bg: #0f1117;
  --panel: #171a23;
  --panel-2: #1e2230;
  --text: #e8eaf0;
  --muted: #a3a9b8;
  --accent: #e5484d;
  --accent-text: #ffffff;
  --line: #2a2f3d;
  --radius: 12px;
  --max: 1040px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- header and footer ---------- */
.site-header { border-bottom: 1px solid var(--line); background: var(--panel); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; }
.logo { color: var(--text); font-weight: 800; font-size: 22px; letter-spacing: 0.5px; text-decoration: none; }
.logo span { color: var(--accent); }
.nav { display: flex; gap: 18px; flex-wrap: wrap; }
.nav a { color: var(--muted); text-decoration: none; font-weight: 600; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }

.site-footer { border-top: 1px solid var(--line); margin-top: 64px; padding: 28px 0; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

/* ---------- building blocks ---------- */
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.1; margin: 0 0 18px; }
.hero p { font-size: 19px; color: var(--muted); max-width: 680px; margin: 0 0 28px; }

.button { display: inline-block; background: var(--accent); color: var(--accent-text); padding: 12px 22px; border-radius: 10px; font-weight: 700; text-decoration: none; }
.button:hover { filter: brightness(1.1); }
.button.secondary { background: var(--panel-2); color: var(--text); border: 1px solid var(--line); }
.buttons { display: flex; gap: 12px; flex-wrap: wrap; }

section { padding: 28px 0; }
h2 { font-size: 28px; margin: 0 0 16px; }
h3 { font-size: 19px; margin: 0 0 8px; }
.lead { color: var(--muted); max-width: 720px; }

.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card p { color: var(--muted); margin: 0; }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.steps li { counter-increment: step; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 18px 18px 62px; position: relative; }
.steps li::before { content: counter(step); position: absolute; left: 18px; top: 16px; width: 30px; height: 30px; border-radius: 50%; background: var(--accent); color: var(--accent-text); display: grid; place-items: center; font-weight: 800; }

.notice { background: var(--panel-2); border-left: 4px solid var(--accent); border-radius: 8px; padding: 14px 18px; }

/* ---------- pricing ---------- */
.plans { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.plan { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; display: flex; flex-direction: column; gap: 10px; }
.plan.featured { border-color: var(--accent); }
.plan .price { font-size: 36px; font-weight: 800; }
.plan .price small { font-size: 16px; color: var(--muted); font-weight: 500; }
.plan ul { padding-left: 20px; margin: 4px 0 12px; color: var(--muted); }
.plan .button { margin-top: auto; text-align: center; }

/* ---------- the guide (generated from docs/user-guide.md) ---------- */
.doc { max-width: 820px; }
.doc h1 { font-size: 36px; margin: 40px 0 12px; }
.doc h2 { margin-top: 40px; padding-top: 12px; border-top: 1px solid var(--line); }
.doc h3 { margin-top: 24px; }
.doc blockquote { margin: 18px 0; background: var(--panel-2); border-left: 4px solid var(--accent); border-radius: 8px; padding: 12px 18px; }
.doc blockquote p { margin: 0; }
.doc code { background: var(--panel-2); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 0.92em; }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.table-scroll { overflow-x: auto; margin: 16px 0; }
.doc table { border-collapse: collapse; width: 100%; min-width: 520px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.doc th { background: var(--panel-2); }

@media (max-width: 560px) {
  .hero { padding: 48px 0 32px; }
  .hero p { font-size: 17px; }
}