/* ============================================================
   SỐNG ĐÚNG KHỎE — Design System
   Hợp nhất Dưỡng Thân & Dưỡng Tâm
   - Nền kem trắng: #FDFBF7
   - Dưỡng Thân (Mộc / Sage Green): #2E6F40
   - Dưỡng Tâm (Nâu trầm / Warm Amber): #8C5A2B
   ============================================================ */

:root {
  --bg: #FDFBF7;
  --card: #FFFFFF;
  --ink: #2C2620;
  --muted: #6E6459;
  --line: #E9E1D3;

  --than: #2E6F40;
  --than-deep: #1E5230;
  --than-soft: #EAF2EB;

  --tam: #8C5A2B;
  --tam-deep: #6C421E;
  --tam-soft: #F7EDDC;

  --radius: 14px;
  --shadow: 0 2px 12px rgba(60, 48, 32, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Be Vietnam Pro", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Khung trang ---------- */
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 780px; margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--card);
  border-bottom: 3px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
body.page-than .site-header { border-bottom-color: var(--than); }
body.page-tam  .site-header { border-bottom-color: var(--tam); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 24px; max-width: 1080px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-mark {
  width: 44px; height: 44px; border-radius: 12px; flex: none;
  background: linear-gradient(135deg, var(--than) 0 50%, var(--tam) 50% 100%);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px;
}
.brand-name { font-weight: 800; font-size: 22px; line-height: 1.2; }
.brand-tag { font-size: 14px; color: var(--muted); line-height: 1.4; }

/* ---------- Nav ---------- */
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.main-nav a {
  text-decoration: none; color: var(--ink); font-weight: 600; font-size: 16px;
  padding: 8px 14px; border-radius: 999px;
}
.main-nav a:hover { background: var(--than-soft); color: var(--than-deep); }
body.page-tam .main-nav a:hover { background: var(--tam-soft); color: var(--tam-deep); }
.main-nav a.active { background: var(--than); color: #fff; }
body.page-tam .main-nav a.active { background: var(--tam); }

/* ---------- Hero ---------- */
.hero { padding: 64px 0 40px; text-align: center; }
.hero h1 { font-size: 40px; line-height: 1.35; margin: 0 0 12px; }
.hero p.lead { font-size: 20px; color: var(--muted); max-width: 720px; margin: 0 auto; }
body.page-than .hero h1 { color: var(--than-deep); }
body.page-tam  .hero h1 { color: var(--tam-deep); }

/* ---------- Thẻ nhánh Thân / Tâm ---------- */
.branch-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px; margin: 32px 0 56px;
}
.branch-card {
  background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 32px; text-decoration: none; color: var(--ink);
  border-top: 6px solid var(--line); display: block;
}
.branch-card.than { border-top-color: var(--than); }
.branch-card.tam  { border-top-color: var(--tam); }
.branch-card h2 { margin: 0 0 8px; font-size: 26px; }
.branch-card.than h2 { color: var(--than-deep); }
.branch-card.tam  h2 { color: var(--tam-deep); }
.branch-card p { margin: 0; color: var(--muted); font-size: 16px; }
.branch-card:hover { transform: translateY(-3px); transition: transform .2s; }

/* ---------- Lưới chuyên mục ---------- */
.cat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px; margin: 24px 0 56px;
}
.cat-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; text-decoration: none; color: var(--ink);
}
.cat-card h3 { margin: 0 0 6px; font-size: 18px; }
.cat-card p { margin: 0; font-size: 15px; color: var(--muted); }
body.page-than .cat-card:hover { border-color: var(--than); }
body.page-tam  .cat-card:hover { border-color: var(--tam); }

/* ---------- Nội dung bài ---------- */
.article { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 40px; margin: 32px 0 56px; }
.article h1 { font-size: 34px; line-height: 1.4; margin-top: 0; }
.notice {
  background: var(--than-soft); border-left: 5px solid var(--than);
  border-radius: 8px; padding: 16px 20px; margin: 24px 0; font-size: 16px;
}
body.page-tam .notice { background: var(--tam-soft); border-left-color: var(--tam); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink); color: #EDE6D8; margin-top: 64px;
}
body.page-than .site-footer { border-top: 5px solid var(--than); }
body.page-tam  .site-footer { border-top: 5px solid var(--tam); }
body.page-home .site-footer { border-top: 5px solid transparent;
  border-image: linear-gradient(90deg, var(--than), var(--tam)) 1; }
.footer-inner { max-width: 1080px; margin: 0 auto; padding: 36px 24px; }
.footer-inner .cols { display: flex; gap: 40px; flex-wrap: wrap; justify-content: space-between; }
.footer-inner a { color: #EDE6D8; }
.footer-copy { text-align: center; padding: 18px 24px; font-size: 15px; color: #CFC4B2; border-top: 1px solid rgba(255,255,255,.12); }

/* ---------- Banner & ảnh thẻ ---------- */
.hero-banner { margin: 8px 0 40px; }
.hero-banner img {
  width: 100%; max-height: 440px; object-fit: cover; display: block;
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.branch-card { padding: 0; overflow: hidden; }
.branch-card .card-thumb { width: 100%; height: 210px; object-fit: cover; display: block; }
.branch-card .card-body { padding: 24px 32px 32px; display: block; }
.branch-card .card-body h2 { margin: 0 0 8px; font-size: 26px; }
.branch-card .card-body p { margin: 0; color: var(--muted); font-size: 16px; }
.branch-card.than .card-body h2 { color: var(--than-deep); }
.branch-card.tam .card-body h2 { color: var(--tam-deep); }

/* ---------- Nhỏ gọn trên điện thoại ---------- */
@media (max-width: 640px) {
  body { font-size: 17px; }
  .hero h1 { font-size: 30px; }
  .header-inner { flex-direction: column; align-items: flex-start; }
  .article { padding: 24px; }
}