/* ═══════════════════════════════════════════════
   AMY TRỊNH — BLOG / ARTICLE THEME
   Bám Design System v1.0. Bao dung cả biến thể class.
═══════════════════════════════════════════════ */

/* ─── Article page shell ─── */
.blog-main{background:var(--cream);padding:0 0 80px}
.article-hero{
  background:linear-gradient(165deg,var(--navy),var(--navy-2));color:var(--cream);
  padding:64px 0 56px;
}
.article-hero .container{max-width:820px}
.article-cat{
  display:inline-block;font-family:var(--ff-num);font-size:12.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gold);margin-bottom:14px;
}
.article-hero h1{color:var(--cream);font-size:clamp(28px,4.2vw,44px);line-height:1.2}
.article-meta{
  margin-top:18px;display:flex;gap:18px;flex-wrap:wrap;align-items:center;
  font-size:14px;color:rgba(250,246,239,.7);font-family:var(--ff-num);
}
.article-meta .am-author{color:var(--gold-soft);font-weight:500}
.article-meta .am-dot{opacity:.4}

.article-container{
  max-width:820px;margin:-28px auto 0;background:#fff;border-radius:18px;
  padding:48px 52px;box-shadow:var(--shadow);position:relative;z-index:2;
}
.article-container > p,
.article-container li{font-size:17px;line-height:1.78;color:#2a2620}

.sapo-paragraph{font-size:18.5px;line-height:1.7;color:#3a352c;margin-bottom:26px}
.sapo-paragraph strong{color:var(--navy)}

/* ─── Headings ─── */
.heading-h2{
  font-family:var(--ff-display);font-size:26px;line-height:1.25;color:var(--navy);
  margin:42px 0 16px;padding-top:8px;
}
.heading-h3{font-family:var(--ff-display);font-size:20px;color:var(--navy-2);margin:26px 0 10px}
.article-container p{margin-bottom:16px}

/* ─── Links ─── */
.article-container a{color:#a9802f;font-weight:600;text-decoration:none;border-bottom:1px solid rgba(201,162,75,.4)}
.article-container a:hover{color:var(--amber);border-bottom-color:var(--amber)}
.link-highlight{color:var(--gold)!important}

/* ─── Key Highlights ─── */
.key-highlights{
  background:var(--cream-2);border:1px solid var(--line);border-left:4px solid var(--gold);
  border-radius:12px;padding:22px 26px;margin:28px 0;
}
.key-highlights p{margin-bottom:10px;color:var(--navy)}
.key-highlights ul{margin:0;padding-left:0;list-style:none}
.key-highlights li{position:relative;padding-left:28px;margin-bottom:9px}
.key-highlights li::before{content:"▲";position:absolute;left:0;top:3px;color:var(--gold);font-size:12px}

/* ─── TOC ─── */
.toc-details{
  background:#fbf8f2;border:1px solid var(--line);border-radius:12px;
  padding:6px 22px;margin:28px 0;
}
.toc-summary{
  display:flex;justify-content:space-between;align-items:center;cursor:pointer;
  font-family:var(--ff-display);font-weight:600;font-size:18px;color:var(--navy);
  padding:14px 0;list-style:none;
}
.toc-summary::-webkit-details-marker{display:none}
.toc-icon{color:var(--gold);font-size:13px;transition:.2s}
.toc-details[open] .toc-icon{transform:rotate(180deg)}
.toc-body{padding:4px 0 14px}
.toc-list{list-style:none;margin:0;padding:0}
.toc-item{margin:0}
.toc-link{
  display:flex;gap:10px;align-items:baseline;padding:8px 0;
  color:var(--navy-2)!important;font-weight:500;border-bottom:none!important;
}
.toc-link:hover{color:var(--amber)!important}
.toc-num{font-family:var(--ff-num);font-size:13px;color:var(--gold);font-weight:700;min-width:22px}

/* ─── Quote / Snippet Zone ─── */
.quote-box{margin:20px 0}
.quote-border{
  border-left:4px solid var(--gold);background:linear-gradient(90deg,rgba(201,162,75,.08),transparent);
  border-radius:0 10px 10px 0;padding:16px 22px;
}
.quote-text{font-family:var(--ff-display);font-size:19px;line-height:1.5;color:var(--navy);margin:0!important;font-style:italic}

/* ─── Info boxes ─── */
.info-box{
  background:#f4f7f5;border:1px solid #dfeae3;border-radius:12px;padding:16px 20px;margin:22px 0;
}
.info-box p{margin:0}
.info-box strong{color:var(--emerald)}
.info-box.warning{background:#fdf6f0;border-color:#f1ddc9}
.info-box.warning strong{color:var(--amber)}

/* ─── Tables (bao dung table-wrapper & data-table-wrapper) ─── */
.table-wrapper,.data-table-wrapper{overflow-x:auto;margin:24px 0;border-radius:12px;border:1px solid var(--line)}
.data-table{width:100%;border-collapse:collapse;font-size:15.5px}
.data-table th,.data-table .table-th{
  background:var(--navy);color:var(--gold-soft);font-family:var(--ff-num);font-weight:600;
  text-align:left;padding:13px 16px;font-size:14px;letter-spacing:.02em;
}
.data-table td,.data-table .table-td{padding:12px 16px;border-top:1px solid var(--line);color:#2a2620}
.data-table tbody tr:nth-child(even){background:#faf7f1}
.data-table .row-bg-light{background:#faf7f1}

/* ─── Instruction step ─── */
.instruction-step{display:flex;gap:18px;margin:18px 0;align-items:flex-start}
.step-number{
  flex:none;width:42px;height:42px;border-radius:12px;background:var(--navy);color:var(--gold);
  display:grid;place-items:center;font-family:var(--ff-num);font-weight:700;font-size:18px;
  border:1.5px solid var(--gold);
}
.step-content{flex:1}
.step-content h3{margin:6px 0 6px}
.step-content p{margin:0}

/* ─── Mistake card ─── */
.mistake-card{
  display:flex;gap:16px;background:#fdf6f0;border:1px solid #f1ddc9;border-left:4px solid var(--amber);
  border-radius:12px;padding:18px 20px;margin:16px 0;align-items:flex-start;
}
.mistake-number{
  flex:none;width:34px;height:34px;border-radius:50%;background:var(--amber);color:#fff;
  display:grid;place-items:center;font-family:var(--ff-num);font-weight:700;
}
.mistake-body strong{display:block;color:var(--navy);font-size:17px;margin-bottom:5px;font-family:var(--ff-display)}
.mistake-body p{margin:0}

/* ─── Numbered list (bao dung ol.numbered-list & div.numbered-list>ol) ─── */
.numbered-list,.numbered-list ol{counter-reset:nl;list-style:none;margin:20px 0;padding-left:0}
ol.numbered-list,.numbered-list > ol{padding-left:0}
.numbered-list li{counter-increment:nl;position:relative;padding-left:42px;margin-bottom:12px;min-height:30px}
.numbered-list li::before{
  content:counter(nl);position:absolute;left:0;top:-2px;width:28px;height:28px;border-radius:8px;
  background:var(--gold);color:var(--navy);font-family:var(--ff-num);font-weight:700;font-size:14px;
  display:grid;place-items:center;
}

/* ─── Comparison box ─── */
.comparison-box{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0}
.compare-col{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:#fff}
.compare-label{font-family:var(--ff-display);font-weight:700;font-size:17px;margin-bottom:10px}
.compare-pro{color:var(--emerald)}
.compare-con{color:var(--crimson)}
.compare-col ul{margin:0;padding-left:18px}
.compare-col li{margin-bottom:7px}

/* ─── Footer note (kết bài) ─── */
.footer-note{
  background:var(--cream-2);border-radius:14px;padding:24px 26px;margin:34px 0 0;
  font-size:17px;line-height:1.75;color:#3a352c;
}

/* ─── Back to blog ─── */
.article-back{display:inline-flex;align-items:center;gap:8px;margin:28px 0 0;font-weight:600;color:var(--navy)}
.article-cta-band{
  background:linear-gradient(165deg,var(--navy),var(--navy-2));color:var(--cream);text-align:center;
  padding:52px 24px;margin-top:60px;border-radius:18px;
}
.article-cta-band h3{color:var(--cream);font-size:26px;margin-bottom:10px}
.article-cta-band p{color:rgba(250,246,239,.74);max-width:520px;margin:0 auto 22px}

/* ─── Blog index ─── */
.blog-index-hero{background:linear-gradient(165deg,var(--navy),var(--navy-2));color:var(--cream);padding:66px 0 56px;text-align:center}
.blog-index-hero h1{color:var(--cream)}
.blog-index-hero p{color:rgba(250,246,239,.75);max-width:560px;margin:14px auto 0}
.post-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:26px;margin:48px 0}
.post-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px 28px;
  box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column;gap:12px;
}
.post-item:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.post-item .blog-tag{margin-bottom:2px}
.post-item h2{font-size:21px;line-height:1.3}
.post-item h2 a{color:var(--navy);border-bottom:none}
.post-item h2 a:hover{color:var(--amber)}
.post-item p{color:var(--muted);font-size:15px;flex-grow:1}
.post-item .post-read{font-weight:600;color:var(--gold);font-family:var(--ff-num);font-size:14px}

@media (max-width:820px){
  .article-container{padding:32px 22px;margin:-20px 16px 0;border-radius:14px}
  .article-hero .container,.article-container{max-width:100%}
  .comparison-box{grid-template-columns:1fr}
}