/* ===== Trang bài viết (trang con) ===== */
body.sub{background:var(--bg)}
.page-hero{position:relative;padding:calc(64px + clamp(36px,6vw,72px)) 0 clamp(28px,4vw,48px);overflow:hidden;
  background:
    radial-gradient(900px 340px at 85% -10%,color-mix(in srgb,var(--red) 38%,transparent),transparent 70%),
    radial-gradient(700px 300px at 0% 120%,color-mix(in srgb,var(--gold) 22%,transparent),transparent 70%),
    linear-gradient(180deg,var(--bg-2),var(--bg));
  border-bottom:1px solid var(--line)}
.page-hero::after{content:"";position:absolute;inset:auto 0 0;height:90px;opacity:.35;pointer-events:none;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 90' preserveAspectRatio='none'%3E%3Cpath fill='%23000' d='M0 90V55l120-30 90 22 140-40 120 35 70-18 160 38 120-30 90 20 150-45 140 40 110-25 120 30v38Z'/%3E%3C/svg%3E") bottom/100% 100% no-repeat}
:root[data-theme="light"] .page-hero::after{opacity:.06}
.crumbs{display:flex;flex-wrap:wrap;gap:6px;font-size:13px;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--gold)}
.crumbs>*+*::before{content:"/";margin-right:6px;opacity:.5}
.crumbs span{color:var(--text)}
.page-hero h1{font-size:clamp(28px,4.4vw,52px);line-height:1.1;font-weight:900;letter-spacing:-.02em;display:flex;align-items:center;gap:.4em;max-width:22ch}
.page-hero .ico{font-size:.8em;filter:drop-shadow(0 4px 12px rgba(0,0,0,.4))}

.page-in{display:grid;grid-template-columns:260px minmax(0,1fr);gap:clamp(24px,4vw,56px);padding-top:clamp(28px,4vw,48px);padding-bottom:80px;align-items:start}
.page-in.no-side{grid-template-columns:minmax(0,1fr)}
.page-in.pet-review-wide{max-width:1900px;grid-template-columns:220px minmax(0,1fr);gap:24px}
@media(max-width:900px){.page-in.pet-review-wide{grid-template-columns:minmax(0,1fr)}}
.side{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.side .eyebrow{margin-bottom:10px}
.side nav{display:flex;flex-direction:column;gap:2px}
.side a{padding:8px 10px 8px calc(10px + var(--lv,0) * 12px);border-radius:10px;font-size:14px;color:var(--muted);line-height:1.35}
.side a:hover{background:var(--card-2);color:var(--text)}
.side a.on{background:color-mix(in srgb,var(--red) 18%,transparent);color:var(--text);font-weight:700;box-shadow:inset 3px 0 0 var(--red)}

/* Nội dung */
.article{min-width:0;font-size:16.5px;line-height:1.75;color:var(--text)}
.article .blk{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:18px;margin:0 0 22px}
.article .col{grid-column:span var(--w);min-width:0;display:flex;flex-direction:column;gap:14px}
.article .blk:not(.multi) .col{grid-column:1/-1}
.article .t-row{display:flex;gap:14px}
.article .t-row>*{flex:1;min-width:0}
.article p{margin:0 0 .7em}
.article p:last-child{margin-bottom:0}
.article .c{text-align:center}
.article .r{text-align:right}
.article h2,.article h3,.article h4{line-height:1.25;margin:1.1em 0 .45em;font-weight:800;scroll-margin-top:90px}
.article h2{font-size:clamp(24px,2.6vw,32px)}
.article h3{font-size:clamp(20px,2vw,24px);color:var(--gold-2)}
.article h4{font-size:18px;color:var(--gold)}
:root[data-theme="light"] .article h3{color:var(--red-2)}
.article .t-text>:first-child{margin-top:0}
.article a:not(.btn){color:var(--gold-2);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--gold) 50%,transparent);text-underline-offset:3px;word-break:break-word}
:root[data-theme="light"] .article a:not(.btn){color:var(--red-2)}
.article ul,.article ol{margin:0 0 .8em;padding-left:1.4em}
.article li{margin:.2em 0}
.article li::marker{color:var(--gold)}
.article strong{color:color-mix(in srgb,var(--text) 100%,var(--gold) 0%);font-weight:800}

.t-img{margin:0;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:var(--card)}
.t-img img,.t-img video{display:block;width:100%;height:auto}
.t-img a.zoom{display:block;cursor:zoom-in}
.t-img.missing{display:grid;place-items:center;color:var(--muted);font-size:13px;background:repeating-linear-gradient(45deg,var(--card),var(--card) 10px,var(--card-2) 10px,var(--card-2) 20px)}
.t-video{position:relative;aspect-ratio:16/9;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#000}
.t-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.t-embed iframe{display:block;width:100%;border:0;border-radius:14px;background:transparent}
.t-btn{display:flex;justify-content:center}
.t-btn .btn{width:100%;justify-content:center}

/* Danh sách bài con */
.kids-h{font-size:22px;margin:36px 0 16px}
.sub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.sub-card{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);transition:.2s;text-decoration:none!important;color:var(--text)!important}
.sub-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--gold) 45%,transparent);box-shadow:var(--shadow)}
.sub-card img,.sub-card .sub-ph{aspect-ratio:16/9;width:100%;object-fit:cover;display:grid;place-items:center}
.sub-card .sub-ph{font-size:44px;font-weight:900;color:var(--gold);background:linear-gradient(135deg,var(--card-2),color-mix(in srgb,var(--red) 22%,var(--card)))}
.sub-card b{padding:14px 16px 4px;font-size:16px;line-height:1.35}
.sub-card small{padding:0 16px 14px;color:var(--muted);font-size:13px}
.sub-card b:last-child{padding-bottom:16px}

.empty-note{padding:28px;border:1px dashed var(--line);border-radius:var(--radius);text-align:center;color:var(--muted)}
.empty-note p{margin-bottom:14px!important}

.pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:48px}
.pager a{display:flex;flex-direction:column;gap:4px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--card);text-decoration:none!important;color:var(--text)!important;font-weight:700;line-height:1.35}
.pager a:hover{border-color:color-mix(in srgb,var(--gold) 45%,transparent)}
.pager small{color:var(--muted);font-weight:500;font-size:12px}
.pager .nx{text-align:right;grid-column:2}

.lightbox{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.88);display:grid;place-items:center;padding:20px;cursor:zoom-out}
.lightbox[hidden]{display:none}
.lightbox img{max-width:100%;max-height:100%;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.6)}

@media (max-width:1100px){
  .page-in{grid-template-columns:220px minmax(0,1fr)}
}
@media (max-width:900px){
  .page-in{grid-template-columns:minmax(0,1fr)}
  .side{position:static;max-height:none;order:2}
  .side nav{flex-direction:row;flex-wrap:wrap;gap:6px}
  .side a{padding:7px 12px;border:1px solid var(--line);font-size:13px}
  .side a.on{box-shadow:none}
}
@media (max-width:640px){
  .article{font-size:16px}
  .article .blk{display:flex;flex-direction:column;gap:14px}
  .article .t-row{flex-direction:column}
  .pager{grid-template-columns:1fr}
  .pager .nx{grid-column:1}
  .page-hero h1{font-size:28px}
}
/* Ảnh, video trong bài viết thêm bằng trang quản lý */
.article .t-text img{max-width:100%;height:auto;border-radius:12px;margin:.3em 0;vertical-align:middle}
.article .t-text a.zoom{display:inline-block;cursor:zoom-in;text-decoration:none}
.article .t-text .t-video{margin:.6em 0}
/* Thẻ bài chưa có ảnh: dùng ảnh pet 3D */
.sub-card .sub-ph.pet{position:relative;overflow:hidden;--c:var(--red);
  background:radial-gradient(70% 90% at 50% 100%,color-mix(in srgb,var(--c) 45%,transparent),transparent 70%),linear-gradient(160deg,#2a1513,#120a09)}
.sub-card .sub-ph.pet img{position:absolute;left:50%;bottom:-4%;aspect-ratio:auto;width:auto;height:108%;max-width:none;object-fit:contain;transform:translateX(-50%);transform-origin:50% 100%;transition:transform .45s cubic-bezier(.2,.8,.2,1);filter:drop-shadow(0 10px 14px rgba(0,0,0,.55))}
.sub-card:hover .sub-ph.pet img{transform:translateX(-50%) translateY(-3%) scale(1.06)}
.sub-card .sub-ph.pet .halo{position:absolute;left:50%;top:55%;width:70%;aspect-ratio:1;transform:translate(-50%,-50%);border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--c) 60%,transparent),transparent 70%);filter:blur(6px)}