/* ============================================================
   CAMERA ĐÓNG HÀNG — phần bài viết
   Nạp thêm sau style.css, chỉ trên trang chuyên mục và bài viết.
   Trang chủ không cần file này nên vẫn nhẹ.
   ============================================================ */

/* ---------- đường dẫn phân cấp ---------- */
.crumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: .45rem;
  font-family: var(--f-mono); font-size: var(--fs-xs);
  color: var(--fg-dim); margin-bottom: 1.4rem;
}
.crumb a { color: var(--fg-dim); text-decoration: none; }
.crumb a:hover { color: var(--signal); }
.crumb span[aria-current] { color: var(--fg); }
.crumb i { font-style: normal; opacity: .45; }

/* ---------- đầu trang chuyên mục ---------- */
.blog-top {
  background: var(--ink); color: #E9EFF5;
  border-bottom: 1px solid #16304A;
  padding-block: clamp(2.5rem, 5vw, 4.25rem);
  position: relative; overflow: hidden;
}
.blog-top::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(900px 460px at 88% 0%, rgba(255,106,0,.13), transparent 62%);
}
.blog-top .wrap { position: relative; }
.blog-top .crumb, .blog-top .crumb a { color: #7E97AC; }
.blog-top .crumb a:hover { color: var(--signal); }
.blog-top .crumb span[aria-current] { color: #C6D7E4; }
.blog-top h1 {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.9rem, 4vw, 3.1rem); line-height: 1.02; letter-spacing: -.028em;
  margin: 0 0 .9rem; color: #fff; text-wrap: balance; max-width: 20ch;
}
.blog-top p { font-size: var(--fs-lead); color: #A9C0D2; max-width: 62ch; margin: 0; text-wrap: pretty; }

/* ---------- thanh chuyên mục ---------- */
.cats {
  display: flex; flex-wrap: wrap; gap: .5rem;
  margin-top: 1.9rem; padding: 0; list-style: none;
}
.cats a {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .5rem .9rem; border-radius: 100px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.05);
  font-family: var(--f-mono); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  color: #C6D7E4; text-decoration: none;
  transition: border-color .16s, color .16s, background .16s;
}
.cats a:hover { border-color: var(--signal); color: var(--signal); }
.cats a[aria-current="page"] { background: var(--signal); border-color: var(--signal); color: var(--on-signal); }
.cats a b { font-weight: 400; opacity: .55; }

/* ---------- thẻ bài viết ---------- */
.posts { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--gap); }
.posts > * { min-width: 0; }

.pcard {
  display: flex; flex-direction: column;
  background: var(--bg-raise);
  border: 1px solid var(--rule); border-radius: var(--r-lg);
  overflow: hidden; text-decoration: none; color: inherit;
  transition: border-color .18s, transform .18s, box-shadow .18s;
}
.pcard:hover { border-color: var(--signal); transform: translateY(-2px); box-shadow: var(--shadow); }
.pcard__img { position: relative; aspect-ratio: 1200 / 630; background: var(--ink); overflow: hidden; }
.pcard__img img { width: 100%; height: 100%; object-fit: cover; }
.pcard__body { padding: 1.15rem 1.2rem 1.3rem; display: flex; flex-direction: column; gap: .5rem; flex: 1; }
.pcard__cat {
  font-family: var(--f-mono); font-size: 10px; font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--signal);
}
.pcard h2, .pcard h3 {
  font-family: var(--f-display); font-weight: 700; font-size: 1.08rem;
  line-height: 1.28; letter-spacing: -.012em; margin: 0; color: var(--fg);
  text-wrap: pretty;
}
.pcard p { margin: 0; font-size: var(--fs-sm); color: var(--fg-mute); flex: 1; }
.pcard__foot {
  display: flex; align-items: center; gap: .5rem; margin-top: .3rem;
  font-family: var(--f-mono); font-size: var(--fs-xs); color: var(--fg-dim);
}
.pcard__foot span { color: var(--signal); }

/* thẻ bài nổi bật */
.pcard--hero { grid-column: 1 / -1; flex-direction: row; align-items: stretch; }
/* giữ nguyên tỷ lệ ảnh, KHÔNG để aspect-ratio:auto — ô cao mà object-fit:cover
   sẽ xén hai bên và cắt mất chữ trên ảnh */
.pcard--hero .pcard__img { flex: 0 0 46%; align-self: center; }
.pcard--hero .pcard__body { justify-content: center; padding: clamp(1.3rem, 3vw, 2.25rem); gap: .7rem; }
.pcard--hero h2 { font-size: clamp(1.3rem, 2.4vw, 1.9rem); }
.pcard--hero p { flex: 0; font-size: var(--fs-body); }
@media (max-width: 780px) {
  .pcard--hero { flex-direction: column; }
  .pcard--hero .pcard__img { flex: none; aspect-ratio: 1200 / 630; }
}

/* ---------- nhóm chuyên mục trên trang danh sách ---------- */
.cgroup { margin-top: clamp(2.5rem, 5vw, 4rem); }
.cgroup__head {
  display: flex; align-items: baseline; gap: 1rem;
  margin-bottom: 1.3rem; padding-bottom: .85rem;
  border-bottom: 1px solid var(--rule);
}
.cgroup__head h2 {
  font-family: var(--f-display); font-weight: 800; font-size: clamp(1.3rem, 2.2vw, 1.65rem);
  letter-spacing: -.02em; margin: 0;
}
.cgroup__head p { margin: 0; font-size: var(--fs-sm); color: var(--fg-mute); flex: 1; }
.cgroup__head a {
  font-family: var(--f-mono); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
  color: var(--signal); text-decoration: none; white-space: nowrap;
}
.cgroup__head a:hover { text-decoration: underline; }
@media (max-width: 620px) { .cgroup__head { flex-wrap: wrap; gap: .4rem; } .cgroup__head p { flex-basis: 100%; } }

/* ============================================================
   TRANG BÀI VIẾT
   ============================================================ */
.art-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: start;
  padding-block: clamp(2.25rem, 4vw, 3.5rem);
}
.art-wrap > * { min-width: 0; }
@media (max-width: 1000px) { .art-wrap { grid-template-columns: minmax(0, 1fr); } }

.art-head { margin-bottom: 1.75rem; }
.art-head h1 {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.75rem, 3.4vw, 2.7rem); line-height: 1.06; letter-spacing: -.03em;
  margin: .5rem 0 .9rem; text-wrap: balance;
}
.art-head__lead { font-size: var(--fs-lead); color: var(--fg-mute); margin: 0 0 1.2rem; text-wrap: pretty; }
.art-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.1rem;
  padding-top: 1.1rem; border-top: 1px solid var(--rule);
  font-family: var(--f-mono); font-size: var(--fs-xs); color: var(--fg-dim);
}
.art-meta b { color: var(--signal); font-weight: 700; }
.art-cover { margin: 0 0 2rem; border: 1px solid var(--rule); border-radius: var(--r-lg); overflow: hidden; }
.art-cover img { width: 100%; }

/* ---------- thân bài ---------- */
.prose { font-size: 1.075rem; line-height: 1.78; color: var(--fg); max-width: 68ch; }
.prose > * { max-width: 100%; }
.prose h2 {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.4rem, 2.2vw, 1.75rem); line-height: 1.18; letter-spacing: -.022em;
  margin: 2.6rem 0 .85rem; scroll-margin-top: 90px; text-wrap: balance;
}
.prose h2:first-child { margin-top: 0; }
.prose h3 {
  font-family: var(--f-display); font-weight: 700;
  font-size: 1.16rem; letter-spacing: -.012em;
  margin: 1.9rem 0 .55rem; scroll-margin-top: 90px;
}
.prose p { margin: 0 0 1.2rem; text-wrap: pretty; }
.prose ul, .prose ol { margin: 0 0 1.35rem; padding-left: 1.35rem; }
.prose li { margin-bottom: .55rem; }
.prose li::marker { color: var(--signal); }
.prose strong { font-weight: 600; color: var(--fg); }
.prose a {
  color: var(--signal); text-decoration: underline;
  text-decoration-thickness: 1px; text-underline-offset: 2px;
}
.prose a:hover { text-decoration-thickness: 2px; }
.prose blockquote {
  margin: 1.6rem 0; padding: 1rem 1.25rem;
  background: var(--bg-sunk); border-left: 3px solid var(--signal);
  border-radius: 0 var(--r) var(--r) 0;
  font-size: var(--fs-sm); color: var(--fg-mute);
}
.prose blockquote p:last-child { margin-bottom: 0; }

/* bảng phải cuộn được riêng, không được đẩy cả trang trượt ngang */
.prose .tw { overflow-x: auto; margin: 0 0 1.5rem; border: 1px solid var(--rule); border-radius: var(--r); }
.prose table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); min-width: 460px; }
.prose thead { background: var(--bg-sunk); }
.prose th, .prose td { padding: .7rem .9rem; text-align: left; border-bottom: 1px solid var(--rule-soft); vertical-align: top; }
.prose th {
  font-family: var(--f-mono); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase; color: var(--fg-dim);
  white-space: nowrap;
}
.prose tbody tr:last-child td { border-bottom: 0; }
.prose td b, .prose td strong { color: var(--signal); font-weight: 600; }

.prose figure { margin: 1.8rem 0; }
.prose figure img { width: 100%; border: 1px solid var(--rule); border-radius: var(--r); }
.prose figcaption {
  margin-top: .6rem; font-size: var(--fs-xs); color: var(--fg-dim);
  line-height: 1.55; padding-left: .1rem;
}

/* ---------- nguồn tham khảo ---------- */
.sources {
  margin-top: 2.5rem; padding: 1.25rem 1.4rem;
  background: var(--bg-sunk); border: 1px solid var(--rule); border-radius: var(--r-lg);
}
.sources h2 {
  font-family: var(--f-mono); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--fg-dim);
  margin: 0 0 .8rem;
}
.sources ol { margin: 0; padding-left: 1.1rem; }
.sources li { margin-bottom: .45rem; font-size: var(--fs-sm); }
.sources li:last-child { margin-bottom: 0; }
.sources a { color: var(--fg-mute); text-decoration: underline; text-underline-offset: 2px; word-break: break-word; }
.sources a:hover { color: var(--signal); }

/* ---------- cột phải ---------- */
.side { position: sticky; top: 88px; display: flex; flex-direction: column; gap: var(--gap); }
@media (max-width: 1000px) { .side { position: static; } }

.toc { border: 1px solid var(--rule); border-radius: var(--r-lg); background: var(--bg-raise); padding: 1.15rem 1.25rem; }
.toc h2 {
  font-family: var(--f-mono); font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: .12em; text-transform: uppercase; color: var(--fg-dim);
  margin: 0 0 .8rem;
}
.toc ol { margin: 0; padding: 0; list-style: none; counter-reset: t; display: flex; flex-direction: column; gap: .1rem; }
.toc a {
  display: block; padding: .38rem 0 .38rem .1rem;
  font-size: var(--fs-sm); line-height: 1.45;
  color: var(--fg-mute); text-decoration: none;
  border-left: 2px solid transparent; padding-left: .75rem;
  transition: color .16s, border-color .16s;
}
.toc a:hover { color: var(--signal); }
.toc a.on { color: var(--fg); border-left-color: var(--signal); font-weight: 500; }

.askbox {
  border: 1px solid #1B3A55; border-radius: var(--r-lg);
  background: linear-gradient(170deg, #0E2436, #081521);
  padding: 1.35rem 1.3rem; color: #E9EFF5;
}
.askbox h2 {
  font-family: var(--f-display); font-weight: 800; font-size: 1.1rem;
  letter-spacing: -.015em; margin: 0 0 .5rem; color: #fff;
}
.askbox p { margin: 0 0 1rem; font-size: var(--fs-sm); color: #9DB4C7; }
.askbox .btn { width: 100%; margin-bottom: .5rem; }
.askbox .btn:last-child { margin-bottom: 0; }

/* ---------- bài liên quan ---------- */
.rel { border-top: 1px solid var(--rule); padding-top: clamp(2rem, 4vw, 3rem); margin-top: clamp(2.5rem, 5vw, 3.5rem); }
.rel > h2 {
  font-family: var(--f-display); font-weight: 800; font-size: 1.45rem;
  letter-spacing: -.02em; margin: 0 0 1.3rem;
}

/* ---------- dải kêu gọi cuối bài ---------- */
.endcta {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  background: var(--ink); border-radius: var(--r-lg);
  color: #E9EFF5; border: 1px solid #16304A;
}
.endcta h2 {
  font-family: var(--f-display); font-weight: 800;
  font-size: clamp(1.25rem, 2.4vw, 1.7rem); letter-spacing: -.02em;
  margin: 0 0 .6rem; color: #fff; text-wrap: balance;
}
.endcta p { margin: 0 0 1.3rem; color: #9DB4C7; font-size: var(--fs-sm); max-width: 56ch; }
.endcta__btns { display: flex; flex-wrap: wrap; gap: .6rem; }