/* blog.css — Giao diện blog tĩnh (Cẩm Nang). Tự chứa, dùng tông Nâu/Kem của thương hiệu. */
:root {
  --bl-bg: #faf6ef;
  --bl-surface: #ffffff;
  --bl-text: #2e2a26;
  --bl-muted: #6f6457;
  --bl-brown-600: #964e30;
  --bl-brown-700: #7c3f27;
  --bl-brown-800: #5b3a29;
  --bl-border: #e7ddcf;
  --bl-soft: #f3eadd;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bl-bg);
  color: var(--bl-text);
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.7;
  font-size: 17px;
}
a { color: var(--bl-brown-700); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top bar */
.bl-top { position: sticky; top: 0; z-index: 10; background: rgba(250,246,239,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--bl-border); }
.bl-top-in { max-width: 1080px; margin: 0 auto; height: 58px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.bl-brand { font-weight: 800; color: var(--bl-brown-800); font-size: 18px; }
.bl-brand:hover { text-decoration: none; }
.bl-nav { display: flex; align-items: center; gap: 18px; font-size: 15px; font-weight: 600; }
.bl-nav a { color: var(--bl-muted); }
.bl-nav a:hover { color: var(--bl-brown-700); text-decoration: none; }
.bl-nav-cta { color: #fff !important; background: linear-gradient(135deg, var(--bl-brown-600), var(--bl-brown-700)); padding: 8px 16px; border-radius: 8px; }
.bl-nav-cta:hover { text-decoration: none !important; opacity: .94; }

/* Layout */
.bl-main { max-width: 760px; margin: 0 auto; padding: 28px 20px 64px; }
.bl-crumb { font-size: 13px; color: var(--bl-muted); margin-bottom: 18px; }
.bl-crumb a { color: var(--bl-muted); }

/* Article */
.bl-article { background: var(--bl-surface); border: 1px solid var(--bl-border); border-radius: 16px; padding: 32px 34px; }
.bl-cat { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; color: var(--bl-brown-700); background: #f1e6d8; border: 1px solid var(--bl-border); padding: 4px 12px; border-radius: 999px; margin: 0 0 14px; }
.bl-article h1 { font-size: 31px; line-height: 1.25; color: var(--bl-brown-800); margin: 0 0 10px; font-weight: 800; }
.bl-meta { font-size: 14px; color: var(--bl-muted); margin: 0 0 26px; }

/* Byline: tác giả + ngày + người duyệt chuyên môn (E-E-A-T) */
.bl-byline { margin: 0 0 26px; padding: 14px 16px; background: var(--bl-soft); border: 1px solid var(--bl-border); border-radius: 10px; }
.bl-byline-line { margin: 0; font-size: 14px; color: var(--bl-muted); display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.bl-byline-by { font-weight: 700; color: var(--bl-brown-800); }
.bl-byline-sep { color: var(--bl-border); }
.bl-byline-review { margin: 8px 0 0; font-size: 13.5px; color: var(--bl-muted); }
.bl-review-badge { display: inline-block; font-weight: 700; color: #356a42; background: #e9f1e8; border: 1px solid #cadfc7; border-radius: 999px; padding: 1px 10px; margin-right: 6px; font-size: 12.5px; }
.bl-hero-img { width: 100%; height: auto; aspect-ratio: 1200 / 630; object-fit: cover; border-radius: 12px; margin: 0 0 26px; border: 1px solid var(--bl-border); }
.bl-body { font-size: 17px; }
.bl-body h2 { font-size: 23px; color: var(--bl-brown-800); margin: 34px 0 12px; font-weight: 700; line-height: 1.3; }
.bl-body h3 { font-size: 19px; color: var(--bl-brown-700); margin: 26px 0 10px; font-weight: 700; }
.bl-body p { margin: 0 0 16px; }
.bl-body ul, .bl-body ol { margin: 0 0 18px; padding-left: 24px; }
.bl-body li { margin: 6px 0; }
.bl-body a { text-decoration: underline; }
.bl-body strong { color: var(--bl-brown-800); }
.bl-body blockquote { margin: 18px 0; padding: 12px 18px; border-left: 4px solid var(--bl-brown-600); background: var(--bl-soft); border-radius: 0 8px 8px 0; color: var(--bl-muted); }
.bl-body img { max-width: 100%; height: auto; border-radius: 10px; }
.bl-body code { background: #f1e6d8; padding: 2px 6px; border-radius: 5px; font-size: .9em; }
.bl-body table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.bl-body th, .bl-body td { border: 1px solid var(--bl-border); padding: 8px 12px; text-align: left; }
.bl-body th { background: var(--bl-soft); }

/* FAQ */
.bl-faq { margin-top: 36px; }
.bl-faq h2 { font-size: 23px; color: var(--bl-brown-800); margin: 0 0 14px; }
.bl-faq details { border: 1px solid var(--bl-border); border-radius: 10px; padding: 12px 16px; margin-bottom: 10px; background: var(--bl-surface); }
.bl-faq summary { font-weight: 700; cursor: pointer; color: var(--bl-brown-800); }
.bl-faq p { margin: 10px 0 0; color: var(--bl-muted); }

/* CTA */
.bl-cta { margin: 36px 0 8px; text-align: center; }
.bl-cta a { display: inline-block; background: linear-gradient(135deg, var(--bl-brown-600), var(--bl-brown-700)); color: #fff; font-weight: 700; padding: 14px 28px; border-radius: 12px; font-size: 16px; box-shadow: 0 6px 16px rgba(124,63,39,.25); }
.bl-cta a:hover { text-decoration: none; transform: translateY(-1px); }

/* Nguồn tham khảo */
.bl-sources { margin-top: 32px; border-top: 1px solid var(--bl-border); padding-top: 20px; }
.bl-sources h2 { font-size: 19px; color: var(--bl-brown-800); margin: 0 0 12px; }
.bl-sources ul { margin: 0; padding-left: 20px; }
.bl-sources li { margin: 6px 0; font-size: 15px; color: var(--bl-muted); }

/* Miễn trừ y tế (hộp cảnh báo) */
.bl-disclaimer { margin-top: 26px; padding: 16px 18px; background: #f8eed8; border: 1px solid #ead2a1; border-left: 4px solid #b9772a; border-radius: 10px; }
.bl-disc-title { margin: 0 0 6px; font-weight: 700; font-size: 14.5px; color: #8a5a1c; }
.bl-disclaimer p { margin: 0; font-size: 13.5px; line-height: 1.65; color: #8a5a1c; }
.bl-disc-meta { margin-top: 10px !important; font-size: 12.5px !important; opacity: .92; }
.bl-disclaimer a { color: #7c3f27; text-decoration: underline; }

/* Related */
.bl-related { margin-top: 32px; border-top: 1px solid var(--bl-border); padding-top: 20px; }
.bl-related h2 { font-size: 19px; color: var(--bl-brown-800); margin: 0 0 12px; }
.bl-related ul { margin: 0; padding-left: 20px; }
.bl-related li { margin: 8px 0; }

/* Index */
.bl-hero { text-align: center; margin: 18px 0 36px; }
.bl-hero h1 { font-size: 36px; color: var(--bl-brown-800); margin: 0 0 10px; font-weight: 800; }
.bl-hero p { color: var(--bl-muted); max-width: 560px; margin: 0 auto; }
.bl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 18px; }
.bl-card { display: block; background: var(--bl-surface); border: 1px solid var(--bl-border); border-radius: 14px; padding: 20px 22px; transition: transform .15s, box-shadow .15s; }
.bl-card:hover { text-decoration: none; transform: translateY(-3px); box-shadow: 0 10px 24px rgba(91,58,41,.12); }
.bl-card-thumb { width: calc(100% + 44px); margin: -20px -22px 14px; height: 150px; object-fit: cover; border-radius: 14px 14px 0 0; display: block; }
.bl-card-cat { display: inline-block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--bl-brown-700); margin-bottom: 8px; }
.bl-card h2 { font-size: 19px; color: var(--bl-brown-800); margin: 0 0 8px; line-height: 1.35; }
.bl-card p { font-size: 14px; color: var(--bl-muted); margin: 0 0 12px; }
.bl-card-meta { font-size: 12px; color: var(--bl-muted); }

/* Footer */
.bl-foot { border-top: 1px solid var(--bl-border); background: var(--bl-surface); }
.bl-foot-in { max-width: 760px; margin: 0 auto; padding: 28px 20px; text-align: center; color: var(--bl-muted); font-size: 14px; }
.bl-foot-in p { margin: 6px 0; }
.bl-foot-note { font-size: 12px; font-style: italic; }

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
  body { font-size: 16px; }

  /* Top bar gọn, không tràn ngang (chỉ giữ nút "Vào Phần Mềm"; điều hướng khác qua breadcrumb + footer) */
  .bl-top-in { height: 54px; padding: 0 14px; gap: 10px; }
  .bl-brand { font-size: 16px; }
  .bl-nav { gap: 10px; font-size: 13px; }
  .bl-nav a:not(.bl-nav-cta) { display: none; }
  .bl-nav-cta { padding: 7px 12px; }

  .bl-main { padding: 18px 14px 48px; }
  .bl-crumb { margin-bottom: 14px; }

  /* Bài viết */
  .bl-article { padding: 20px 16px; border-radius: 12px; }
  .bl-cat { margin-bottom: 12px; }
  .bl-article h1 { font-size: 25px; }
  .bl-meta { margin: 0 0 18px; }
  .bl-byline { padding: 12px 14px; }
  .bl-hero-img { border-radius: 10px; margin-bottom: 18px; }
  .bl-body { font-size: 16.5px; }
  .bl-body h2 { font-size: 21px; margin: 28px 0 10px; }
  .bl-body h3 { font-size: 18px; }
  /* Bảng rộng -> cuộn ngang trong khung thay vì tràn cả trang */
  .bl-body table { display: block; width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  /* URL/nguồn dài không phá vỡ layout */
  .bl-body a, .bl-sources li { overflow-wrap: anywhere; word-break: break-word; }

  .bl-faq, .bl-related, .bl-sources { margin-top: 26px; padding-top: 16px; }
  .bl-faq h2, .bl-related h2, .bl-sources h2 { font-size: 18px; }
  .bl-faq details { padding: 10px 14px; }
  .bl-disclaimer { padding: 14px 15px; }

  /* CTA full-width dễ chạm tay */
  .bl-cta { margin: 28px 0 6px; }
  .bl-cta a { display: block; text-align: center; padding: 14px 18px; font-size: 15.5px; }

  /* Trang danh sách */
  .bl-hero { margin: 10px 0 24px; }
  .bl-hero h1 { font-size: 28px; }
  .bl-grid { grid-template-columns: 1fr; gap: 14px; }
  .bl-card { padding: 16px 18px; }
  .bl-card-thumb { width: calc(100% + 36px); margin: -16px -18px 12px; height: 160px; }
}

/* Màn rất nhỏ (≤380px): tránh brand + CTA chen nhau */
@media (max-width: 380px) {
  .bl-brand { font-size: 15px; }
  .bl-nav-cta { padding: 6px 10px; font-size: 12.5px; }
  .bl-article h1 { font-size: 23px; }
}