/* Style cho trang bài viết (guide, FAQ, changelog, privacy) và trang hub.
   Nạp SAU base.css. Không có gì tái dùng từ landing.css. */

/* ---------- khung 2 cột: nội dung + mục lục dính ---------- */
.doc{display:grid;grid-template-columns:minmax(0,72ch) 240px;gap:clamp(2rem,4vw,4rem);
  align-items:start;padding:clamp(1.5rem,3vw,2.5rem) 0 var(--space)}
.doc.solo{grid-template-columns:minmax(0,72ch);padding-bottom:clamp(1.25rem,2.5vw,2rem)}
@media (max-width:1000px){
  .doc{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
}

/* ---------- breadcrumb ---------- */
.crumb{font:600 var(--t-micro)/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--text-3);margin:0 0 clamp(1.5rem,3vw,2.25rem);display:flex;gap:8px;flex-wrap:wrap;
  border-top:1px solid var(--border)}
/* Nền --bg đục lỗ qua đường kẻ, giống .ch-num trên trang chủ. */
.crumb a,.crumb span{background:var(--bg);transform:translateY(-50%)}
.crumb a{color:var(--text-2);text-decoration:none;text-underline-offset:3px}
.crumb a:first-child{padding-right:4px}
.crumb a:last-child{padding-right:14px}
.crumb a:hover{color:var(--text)}

/* ---------- chữ trong bài ---------- */
.prose h1{font-size:clamp(2rem,1.2rem + 2.4vw,3rem);line-height:1.06;letter-spacing:-.028em;
  font-weight:500;margin:0 0 14px}
.prose .updated{font:500 11.5px/1 var(--mono);letter-spacing:.06em;color:var(--text-3);
  margin:14px 0 clamp(2rem,4vw,2.75rem)}
.prose h2{font-size:clamp(1.5rem,1.15rem + 1.4vw,2.1rem);letter-spacing:-.022em;line-height:1.14;
  margin:clamp(3rem,6vw,4.5rem) 0 16px;scroll-margin-top:24px;
  padding-top:clamp(1rem,2vw,1.5rem);border-top:1px solid var(--border)}
.prose h2:first-of-type{border-top:0;padding-top:0}
.prose h3{font-size:1.1rem;letter-spacing:-.01em;margin:32px 0 10px;scroll-margin-top:24px}
.prose p,.prose li{color:var(--text-2);font-size:1.02rem}
.prose p{margin:0 0 16px}
.prose strong{color:var(--text);font-weight:650}
.prose a{color:var(--text);text-decoration:underline;text-decoration-color:var(--indigo);
  text-underline-offset:3px;text-decoration-thickness:1.5px}
.prose a:hover{text-decoration-color:var(--violet)}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose li{margin:0 0 8px}
.prose li::marker{color:var(--text-3)}
.prose hr{border:0;border-top:1px solid var(--border);margin:44px 0}
.prose blockquote{margin:0 0 18px;padding:2px 0 2px 18px;border-left:2px solid var(--indigo);color:var(--text-2)}
.prose .lede{font-size:1.12rem;color:var(--text-2);margin:0 0 28px}

/* ---------- ảnh ---------- */
.prose figure{margin:clamp(1.75rem,4vw,2.75rem) 0}
.prose figure img,.prose figure video{width:100%;height:auto;background:var(--bg-2);
  border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.9),inset 0 1px 0 rgba(255,255,255,.05)}
.prose figcaption{font:500 12px/1.6 var(--mono);color:var(--text-3);margin-top:12px;
  padding-left:12px;border-left:1px solid var(--border)}
/* Ảnh rộng: cho tràn ra khỏi cột 72ch để chi tiết UI còn đọc được. */
.prose figure.wide{margin-left:calc(-1 * clamp(0px,4vw,80px));
  margin-right:calc(-1 * clamp(0px,4vw,80px))}

/* ---------- callout ---------- */
.callout{border:1px solid var(--border);border-left-width:3px;border-radius:var(--r-sm);
  padding:16px 18px;margin:24px 0;background:rgba(255,255,255,.02)}
.callout p:last-child{margin:0}
.callout>strong{display:block;margin-bottom:6px;font-size:.9rem;letter-spacing:.02em}
.callout.note{border-left-color:var(--indigo)}
.callout.tip{border-left-color:var(--green)}
.callout.warn{border-left-color:var(--red)}

/* ---------- bảng ---------- */
.tablewrap{overflow-x:auto;margin:0 0 22px;border:1px solid var(--border);border-radius:var(--r-md)}
.prose table{border-collapse:collapse;width:100%;font-size:.95rem}
.prose th,.prose td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--border);
  color:var(--text-2);vertical-align:top}
.prose th{color:var(--text);font-weight:650;background:rgba(255,255,255,.03);white-space:nowrap}
.prose tr:last-child td{border-bottom:0}

/* ---------- code ---------- */
.prose code{font:500 .88em/1.5 var(--mono);background:var(--surface-hi);color:var(--text);
  padding:2px 6px;border-radius:5px;border:1px solid var(--border)}
.prose pre{overflow-x:auto;background:var(--bg-2);border:1px solid var(--border);
  border-radius:var(--r-md);padding:16px 18px;margin:0 0 22px}
.prose pre code{background:none;border:0;padding:0;white-space:pre;font-size:.86rem;line-height:1.6}

/* ---------- các bước có số ---------- */
.prose ol.numbered{counter-reset:n;list-style:none;padding:0}
.prose ol.numbered>li{counter-increment:n;position:relative;padding-left:44px;margin-bottom:20px}
.prose ol.numbered>li::before{content:counter(n);position:absolute;left:0;top:-1px;width:28px;height:28px;
  border-radius:9px;display:grid;place-items:center;background:var(--surface-hi);
  border:1px solid var(--border);color:var(--accent-text);font:700 12px/1 var(--mono)}

/* ---------- mục lục ---------- */
.toc{position:sticky;top:24px;font-size:13.5px}
.toc strong{display:block;font:600 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;
  color:var(--text-3);margin-bottom:12px}
.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--border);counter-reset:t}
.toc li{margin:0;counter-increment:t}
.toc a{display:block;padding:7px 0 7px 14px;margin-left:-1px;color:var(--text-2);text-decoration:none;
  border-left:1px solid transparent;transition:color .25s,border-color .25s}
.toc a::before{content:counter(t,decimal-leading-zero);font:600 9.5px/1 var(--mono);
  color:var(--text-3);margin-right:9px;letter-spacing:.08em}
.toc a:hover{color:var(--text)}
.toc a[aria-current="true"]{color:var(--text);border-left-color:var(--indigo)}

/* ---------- prev/next ---------- */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:52px 0 0}
.pager a{border:1px solid var(--border);border-radius:var(--r-md);padding:16px 18px;text-decoration:none;
  transition:border-color .3s,transform .3s var(--ease)}
.pager a:hover{border-color:#4a4a52;transform:translateY(-2px)}
.pager span{display:block;font:600 11px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
  color:var(--text-3);margin-bottom:6px}
.pager b{font-weight:600;font-size:.98rem}
.pager .next{text-align:right}
@media (max-width:640px){ .pager{grid-template-columns:1fr} .pager .next{text-align:left} }

/* ---------- trang hub ---------- */
/* Danh sách .guidelist định nghĩa ở base.css (dùng chung với trang chủ). */
.wrap > .guidelist{padding-bottom:var(--space)}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--border)}
.faq details{border:0;border-bottom:1px solid var(--border);border-radius:0;margin:0;background:none}
.faq summary{cursor:pointer;padding:19px 0;font-weight:600;list-style:none;display:flex;
  justify-content:space-between;gap:14px;align-items:center;
  transition:padding-left .3s var(--ease)}
.faq summary:hover{padding-left:8px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:400 19px/1 var(--mono);color:var(--text-3);flex:none}
.faq details[open] summary::after{content:"−"}
.faq summary:focus-visible{outline:2px solid var(--indigo);outline-offset:4px;border-radius:4px}
.faq details>div{padding:0 0 20px;max-width:66ch}
.faq details>div p:last-child{margin:0}

/* ---------- CTA cuối bài ---------- */
/* Cùng dáng .closer của trang chủ: canh giữa, chỉ một đường kẻ, không phải thẻ. */
.endcta{margin:clamp(3rem,6vw,4.5rem) 0 0;padding:clamp(2rem,4vw,3rem) 0 0;
  border-top:1px solid var(--border);text-align:center}
.endcta h2{margin:0 0 10px;font-size:clamp(1.4rem,1.1rem + 1.2vw,1.9rem);
  border-top:0;padding-top:0}
.endcta p{margin:0 auto 24px;max-width:48ch}

@media print{
  .glow,.grain,header,footer,.toc,.pager,.endcta{display:none!important}
  body{background:#fff;color:#000}
  .prose p,.prose li,.prose th,.prose td{color:#000}
}