/* dualuoi.vn - blog shared styles */
:root {
  --green-primary: #2D7D46;
  --green-dark: #1a5c30;
  --green-light: #E8F5E9;
  --yellow-melon: #FFD93D;
  --yellow-light: #FFF8DC;
  --cream: #FFFEF7;
  --text-dark: #1a3a1a;
  --text-muted: #5a7a5a;
  --radius: 16px;
  --shadow: 0 8px 32px rgba(45, 125, 70, 0.10);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(180deg, #FFFEF7 0%, #F8FFF5 60%, #FFFEF7 100%);
  color: var(--text-dark);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--green-primary); }
img { max-width: 100%; height: auto; display: block; }

/* Article figures (ảnh trong bài) */
.article figure { margin: 26px 0; }
.article figure img { width: 100%; border-radius: 16px; box-shadow: 0 8px 28px rgba(45,125,70,.12); }
.article figcaption { text-align: center; color: var(--text-muted); font-size: .9rem; margin-top: 8px; font-style: italic; }
.article h3 { font-size: 1.15rem; color: var(--green-primary); margin: 22px 0 8px; }
.article table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: .97rem; }
.article th, .article td { border: 1px solid rgba(45,125,70,.18); padding: 9px 12px; text-align: left; }
.article th { background: var(--green-light); color: var(--green-dark); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 254, 247, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(45, 125, 70, 0.12);
}
.site-header-inner {
  max-width: 920px; margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.15rem; color: var(--green-primary); text-decoration: none; }
.site-nav a { margin-left: 18px; text-decoration: none; color: var(--text-muted); font-weight: 600; font-size: .95rem; }
.site-nav a:hover { color: var(--green-primary); }

/* Container */
.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.wrap-wide { max-width: 920px; margin: 0 auto; padding: 0 20px; }

/* Breadcrumb */
.breadcrumb { font-size: .85rem; color: var(--text-muted); margin: 22px 0 8px; }
.breadcrumb a { text-decoration: none; }
.breadcrumb span { margin: 0 6px; }

/* Article */
.article h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); line-height: 1.25; color: var(--green-dark); margin: 10px 0 14px; }
.article .meta { color: var(--text-muted); font-size: .9rem; margin-bottom: 22px; }
.article h2 { font-size: 1.4rem; color: var(--green-dark); margin: 34px 0 12px; padding-left: 12px; border-left: 4px solid var(--yellow-melon); }
.article h3 { font-size: 1.12rem; color: var(--green-primary); margin: 22px 0 8px; }
.article p, .article li { font-size: 1.04rem; margin-bottom: 14px; }
.article ul, .article ol { margin: 0 0 16px 22px; }
.article li { margin-bottom: 8px; }
.article strong { color: var(--green-dark); }
.lead { font-size: 1.12rem; color: var(--text-muted); margin-bottom: 24px; }

.callout {
  background: var(--green-light); border: 1px solid rgba(45,125,70,.18);
  border-radius: var(--radius); padding: 18px 20px; margin: 24px 0;
}
.callout strong { color: var(--green-dark); }

/* CTA box */
.cta {
  background: linear-gradient(135deg, var(--green-primary), var(--green-dark));
  color: #fff; border-radius: var(--radius); padding: 28px 24px; margin: 36px 0; text-align: center;
}
.cta h3 { color: #fff; font-size: 1.3rem; margin-bottom: 8px; }
.cta p { color: rgba(255,255,255,.9); margin-bottom: 18px; }
.cta .btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px; font-weight: 700; text-decoration: none; }
.btn-yellow { background: var(--yellow-melon); color: var(--green-dark); }
.btn-outline { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.5); }

/* FAQ */
.faq-block { margin: 30px 0; }
.faq-block details {
  background: #fff; border: 1px solid rgba(45,125,70,.14); border-radius: 12px;
  padding: 14px 18px; margin-bottom: 12px; box-shadow: var(--shadow);
}
.faq-block summary { font-weight: 700; cursor: pointer; color: var(--green-dark); }
.faq-block p { margin: 10px 0 0; color: var(--text-muted); }

/* Blog index cards */
.posts { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; margin: 28px 0 40px; }
.post-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid rgba(45,125,70,.1);
  display: flex; flex-direction: column; transition: transform .25s, box-shadow .25s;
}
.post-card:hover { transform: translateY(-4px); box-shadow: 0 14px 40px rgba(45,125,70,.18); }
.post-card .body { padding: 18px; flex: 1; display: flex; flex-direction: column; }
.post-card h2 { font-size: 1.15rem; color: var(--green-dark); margin-bottom: 8px; line-height: 1.35; }
.post-card p { color: var(--text-muted); font-size: .95rem; flex: 1; }
.post-card a.read { margin-top: 12px; font-weight: 700; text-decoration: none; color: var(--green-primary); }
.page-title { font-size: clamp(1.8rem, 4vw, 2.4rem); color: var(--green-dark); margin: 24px 0 6px; }
.page-sub { color: var(--text-muted); margin-bottom: 10px; }

/* Footer */
.site-footer { background: var(--green-dark); color: rgba(255,255,255,.85); margin-top: 50px; padding: 30px 20px; text-align: center; font-size: .92rem; }
.site-footer a { color: var(--yellow-melon); text-decoration: none; }

.related { border-top: 1px solid rgba(45,125,70,.15); margin-top: 40px; padding-top: 22px; }
.related h3 { color: var(--green-dark); margin-bottom: 12px; }
.related ul { list-style: none; margin: 0; }
.related li { margin-bottom: 8px; }