:root {
  --page: #fff8fb;
  --surface: #ffffff;
  --blush: #ffe1ec;
  --pink: #f7a3c5;
  --raspberry: #c2427c;
  --ink: #3e1a2e;
  --ink-soft: #6e3553;
  --mist: #8a6a7b;
  --line: #fbe3ec;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

a { color: var(--raspberry); text-underline-offset: 3px; }
a:focus-visible { outline: 3px solid var(--pink); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 800; font-size: 20px; }
.brand img { width: 36px; height: 36px; border-radius: 10px; }
.top nav { display: flex; gap: 18px; font-size: 15px; font-weight: 600; }
.top nav a { text-decoration: none; }

/* Trang chủ */
.hero {
  margin-top: 8px;
  padding: 40px 28px 0;
  border-radius: 32px;
  background: linear-gradient(160deg, #ffe9f1 0%, #ffd2e3 55%, #f7a3c5 100%);
  text-align: center;
  overflow: hidden;
}
.hero h1 { margin: 0; font-size: clamp(32px, 7vw, 48px); line-height: 1.12; letter-spacing: -0.02em; font-weight: 800; }
.hero p { margin: 14px auto 0; max-width: 34ch; color: var(--ink-soft); font-size: 18px; }
.hero img { display: block; width: min(260px, 70%); margin: 24px auto 0; }

.features { display: grid; gap: 14px; margin: 28px 0; }
@media (min-width: 640px) { .features { grid-template-columns: 1fr 1fr; } }
.feature { background: var(--surface); border-radius: 24px; padding: 20px 22px; box-shadow: 0 6px 18px rgba(194, 66, 124, 0.08); }
.feature h2 { margin: 0 0 4px; font-size: 18px; }
.feature p { margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.55; }

.note { background: var(--surface); border-radius: 24px; padding: 20px 22px; margin-bottom: 28px; color: var(--ink-soft); font-size: 15px; }
.note strong { color: var(--ink); }

/* Trang văn bản (chính sách, điều khoản) */
.doc { background: var(--surface); border-radius: 28px; padding: 28px 24px 12px; margin: 8px 0 28px; }
@media (min-width: 640px) { .doc { padding: 40px 44px 20px; } }
.doc h1 { margin: 0; font-size: clamp(28px, 6vw, 36px); line-height: 1.2; letter-spacing: -0.015em; }
.doc .updated { margin: 6px 0 24px; color: var(--mist); font-size: 14px; }
.doc h2 { margin: 32px 0 8px; font-size: 20px; line-height: 1.35; }
.doc h3 { margin: 20px 0 4px; font-size: 17px; }
.doc p, .doc li { color: var(--ink-soft); }
.doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.doc strong { color: var(--ink); }
.doc hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0 8px; }

footer { padding: 8px 0 40px; color: var(--mist); font-size: 14px; display: flex; flex-wrap: wrap; gap: 8px 18px; }
footer a { color: var(--mist); }