/* MeeChat — trang khách (giới thiệu · hướng dẫn · điều khoản). Một màu nhấn, đọc tốt trên điện thoại. */
:root { --brand: #c2410c; --brand-logo: #ea580c; --brand-soft: #fff7ed; --ink: #0f172a; --muted: #64748b; --line: #e2e8f0; --bg: #f8fafc; --warn: #b45309; --warn-soft: #fffbeb; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.65 "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif; }
a { color: var(--brand); }
.top { background: #fff; border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 12px; padding-top: 14px; padding-bottom: 14px; }
.top img { width: 36px; height: 36px; border-radius: 10px; }
.top b { color: var(--brand); font-size: 18px; }
.top nav { margin-left: auto; display: flex; gap: 16px; font-size: 15px; flex-wrap: wrap; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a[aria-current="page"] { color: var(--brand); font-weight: 600; }
.wrap { max-width: 860px; margin: 0 auto; padding: 0 16px; }
main.wrap { padding-top: 28px; padding-bottom: 48px; }
h1 { font-size: 28px; line-height: 1.25; margin: 0 0 10px; }
h2 { font-size: 21px; margin: 34px 0 10px; padding-top: 6px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p, li { color: #1e293b; }
.lead { font-size: 18px; color: var(--muted); margin: 0 0 22px; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; margin: 16px 0; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px; background: var(--brand); color: #fff; font-weight: 600; text-decoration: none; }
.btn.ghost { background: #fff; color: var(--brand); border: 1px solid var(--brand); }
.btns { display: flex; gap: 12px; flex-wrap: wrap; margin: 18px 0 8px; }
.note { background: var(--warn-soft); border: 1px solid #fde68a; border-left: 4px solid var(--warn); border-radius: 10px; padding: 14px 16px; margin: 16px 0; }
.note b { color: var(--warn); }
.ok { background: var(--brand-soft); border: 1px solid #fed7aa; border-left: 4px solid var(--brand); border-radius: 10px; padding: 14px 16px; margin: 16px 0; }
.draft { background: #fef2f2; border: 1px dashed #f87171; color: #991b1b; border-radius: 10px; padding: 10px 14px; margin: 0 0 18px; font-size: 14px; }
ol.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
ol.steps > li { counter-increment: s; position: relative; padding: 16px 18px 16px 62px; background: #fff; border: 1px solid var(--line); border-radius: 14px; margin: 12px 0; }
ol.steps > li::before { content: counter(s); position: absolute; left: 18px; top: 16px; width: 30px; height: 30px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 700; display: grid; place-items: center; }
ol.steps h3 { margin: 0 0 4px; }
ul.check { padding-left: 0; list-style: none; }
ul.check li { padding-left: 28px; position: relative; margin: 6px 0; }
ul.check li::before { content: "✓"; position: absolute; left: 4px; color: var(--brand); font-weight: 700; }
.terms h2 { font-size: 19px; }
.terms li { margin: 4px 0; }
code, kbd { font-family: Consolas, "Cascadia Mono", monospace; font-size: 14px; background: #f1f5f9; border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
footer { border-top: 1px solid var(--line); background: #fff; }
footer .wrap { padding-top: 18px; padding-bottom: 18px; font-size: 14px; color: var(--muted); }
@media (max-width: 600px) {
  h1 { font-size: 24px; }
  .top nav { gap: 12px; font-size: 14px; }
  ol.steps > li { padding-left: 54px; }
  ol.steps > li::before { left: 14px; }
}