/* ============================================================
   blog-list.css — Trang blog index + archive (port từ blog.html).
   Scope dưới .blog-index để không đụng catalog/khoá học.
   Base reset, .wrap, header/footer, .vts-toast đã ở tokens/main.css.
   ============================================================ */

/* ---------- Hero ---------- */
.blog-index .bhero{position:relative;padding:54px 0 30px;overflow:hidden}
.blog-index .bhero--archive{padding:44px 0 22px}
.blog-index .bhero .glow{position:absolute;top:-150px;right:-100px;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(15,80,26,.16),transparent 62%);filter:blur(16px);pointer-events:none}
.blog-index .bhero-inner{position:relative;z-index:1;text-align:center;max-width:680px;margin:0 auto}
.blog-index .eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);padding:6px 14px;border-radius:30px;font-size:13px;font-weight:600;color:var(--ink-2);box-shadow:var(--shadow-sm);margin-bottom:20px}
.blog-index .eyebrow svg{width:15px;height:15px;color:var(--brand)}
.blog-index .bhero h1{font-family:var(--font-display);font-weight:800;font-size:clamp(34px,5vw,52px);line-height:1.05;letter-spacing:-1.6px;margin-bottom:16px}
.blog-index .bhero h1 span{color:var(--brand)}
.blog-index .bhero p{font-size:17.5px;color:var(--ink-2);max-width:560px;margin:0 auto}

/* ---------- Featured ---------- */
.blog-index .featured{display:grid;grid-template-columns:1.05fr 1fr;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin:34px 0 44px;transition:transform .3s,box-shadow .3s}
.blog-index .featured:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.blog-index .featured .cv{position:relative;display:block;min-height:320px;color:#fff;overflow:hidden}
.blog-index .featured .cv .b{position:absolute;inset:0;transition:transform .5s}
.blog-index .featured:hover .cv .b{transform:scale(1.04)}
.blog-index .featured .cv .b::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 90% at 80% 0%,rgba(255,255,255,.24),transparent 55%)}
.blog-index .grain{position:absolute;inset:0;opacity:.12;mix-blend-mode:overlay;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.blog-index .featured .cv .ico{position:absolute;right:-20px;bottom:-24px;opacity:.16}
.blog-index .featured .cv .ico svg{width:180px;height:180px}
.blog-index .featured .cv .kw{position:absolute;left:34px;right:34px;top:50%;transform:translateY(-58%);font-family:var(--font-display);font-weight:800;font-size:clamp(26px,3vw,38px);line-height:1.05;letter-spacing:-.7px;text-shadow:0 3px 16px rgba(0,0,0,.25);white-space:pre-line}
.blog-index .featured .cv .pin{position:absolute;top:18px;left:18px;background:#fff;color:var(--brand-deep);font-weight:700;font-size:12.5px;padding:6px 13px;border-radius:30px;display:inline-flex;align-items:center;gap:6px;box-shadow:0 6px 14px -6px rgba(0,0,0,.4)}
.blog-index .featured .cv .pin svg{width:14px;height:14px}
.blog-index .featured .fi{padding:34px 36px;display:flex;flex-direction:column;justify-content:center}
.blog-index .featured .fcat{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;color:var(--brand-deep);background:var(--brand-soft);padding:5px 12px;border-radius:30px;width:fit-content;margin-bottom:14px}
.blog-index .featured .fh2{display:block;font-family:var(--font-display);font-weight:800;font-size:clamp(22px,2.5vw,30px);letter-spacing:-.7px;line-height:1.15;margin-bottom:12px}
.blog-index .featured .fex{display:block;font-size:15.5px;color:var(--ink-2);margin-bottom:20px}

/* ---------- Meta (author) ---------- */
.blog-index .meta{display:flex;align-items:center;gap:11px}
.blog-index .meta .date-ico{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--brand-soft);flex-shrink:0}
.blog-index .meta .date-ico svg{width:18px;height:18px;display:block;stroke:var(--brand-deep,#0A3A13);color:var(--brand-deep,#0A3A13)}
.blog-index .meta .mtx{display:flex;flex-direction:column}
.blog-index .meta .mn{font-size:14px;font-weight:600;color:var(--ink);line-height:1.2}
.blog-index .meta .md{font-size:12.5px;color:var(--ink-3)}

/* ---------- Toolbar ---------- */
.blog-index .toolbar{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:28px;flex-wrap:wrap}
.blog-index .chips{display:flex;gap:9px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.blog-index .chips::-webkit-scrollbar{display:none}
.blog-index .chip{flex-shrink:0;font-size:14px;font-weight:600;padding:9px 16px;border-radius:11px;color:var(--ink-2);border:1.5px solid var(--line-2);background:var(--surface);transition:.18s;white-space:nowrap;cursor:pointer}
.blog-index .chip:hover{border-color:var(--ink-3);color:var(--ink)}
.blog-index .chip.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.blog-index .rescount{font-size:14px;color:var(--ink-2)}
.blog-index .rescount b{color:var(--ink);font-weight:700}

/* ---------- Layout grid ---------- */
.blog-index .layout{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start;padding-bottom:30px}

/* ---------- Post grid ---------- */
.blog-index .pgrid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.blog-index .pgrid.loading{opacity:.55;transition:opacity .2s}
.blog-index .post{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s,border-color .3s;opacity:0;transform:translateY(16px);animation:vts-rise .55s cubic-bezier(.2,.7,.2,1) forwards}
@keyframes vts-rise{to{opacity:1;transform:none}}
.blog-index .post:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.blog-index .post .cv{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;color:#fff}
.blog-index .post .cv .b{position:absolute;inset:0;transition:transform .5s}
.blog-index .post:hover .cv .b{transform:scale(1.06)}
.blog-index .post .cv .b::after{content:"";position:absolute;inset:0;background:radial-gradient(120% 90% at 80% 0%,rgba(255,255,255,.24),transparent 55%)}
.blog-index .post .cv .ico{position:absolute;right:-12px;bottom:-16px;opacity:.18}
.blog-index .post .cv .ico svg{width:120px;height:120px}
.blog-index .post .cv .kw{position:absolute;left:18px;right:16px;top:50%;transform:translateY(-58%);font-family:var(--font-display);font-weight:800;font-size:22px;line-height:1.05;letter-spacing:-.5px;text-shadow:0 3px 14px rgba(0,0,0,.22);white-space:pre-line}
.blog-index .post .cv .ct{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92);color:var(--ink);font-size:11.5px;font-weight:700;padding:4px 11px;border-radius:30px}
.blog-index .post .cv .rt{position:absolute;right:14px;bottom:14px;background:rgba(0,0,0,.4);backdrop-filter:blur(4px);color:#fff;font-size:11.5px;font-weight:600;padding:4px 10px;border-radius:30px;display:inline-flex;align-items:center;gap:5px}
.blog-index .post .cv .rt svg{width:12px;height:12px}
.blog-index .post .pb{padding:20px;display:flex;flex-direction:column;flex:1;gap:11px}
.blog-index .post .ph3{display:block;font-family:var(--font-display);font-weight:700;font-size:18.5px;letter-spacing:-.4px;line-height:1.25;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s}
.blog-index .post:hover .ph3{color:var(--brand-deep)}
.blog-index .post .ex{display:-webkit-box;font-size:14px;color:var(--ink-2);line-height:1.55;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.blog-index .post .pfoot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line)}

/* ---------- Load more ---------- */
.blog-index .loadmore{margin:34px auto 0;display:block;border:1.5px solid var(--line-2);border-radius:13px;padding:13px 28px;font-weight:600;font-size:15px;color:var(--ink);background:none;transition:.18s;cursor:pointer}
.blog-index .loadmore:hover{border-color:var(--ink);background:var(--surface)}
.blog-index .loadmore[hidden]{display:none}
.blog-index .loadmore.loading{opacity:.6;pointer-events:none}

/* ---------- Empty ---------- */
.blog-index .empty{grid-column:1/-1;text-align:center;padding:60px 20px;color:var(--ink-3)}
.blog-index .empty .em{font-size:42px;margin-bottom:10px}
.blog-index .empty h3{font-family:var(--font-display);color:var(--ink);font-size:20px;margin-bottom:6px}

/* ---------- Sidebar ---------- */
.blog-index .side{position:sticky;top:90px;display:flex;flex-direction:column;gap:22px}
.blog-index .swid{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.blog-index .swid h4{font-family:var(--font-display);font-weight:800;font-size:16px;letter-spacing:-.3px;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.blog-index .swid h4 .bar{width:4px;height:18px;border-radius:3px;background:linear-gradient(var(--brand),var(--brand-2))}
.blog-index .catlist{display:flex;flex-direction:column;gap:3px}
.blog-index .catlist a{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 12px;border-radius:11px;font-size:14px;font-weight:500;color:var(--ink-2);transition:.16s}
.blog-index .catlist a:hover{background:var(--bg);color:var(--ink)}
.blog-index .catlist a.active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.blog-index .catlist .cnt{font-size:12px;font-weight:700;background:var(--bg-2);color:var(--ink-3);padding:1px 9px;border-radius:30px}
.blog-index .catlist a.active .cnt{background:#fff;color:var(--brand-deep)}
.blog-index .pop{display:flex;gap:13px;padding:11px 0;border-bottom:1px solid var(--line)}
.blog-index .pop:last-child{border:none;padding-bottom:0}
.blog-index .pop:first-child{padding-top:0}
.blog-index .pop .num{font-family:var(--font-display);font-weight:800;font-size:22px;color:var(--line-2);line-height:1;flex-shrink:0;width:24px;transition:.18s}
.blog-index .pop:hover .num{color:var(--brand)}
.blog-index .pop .ptx{display:block}
.blog-index .pop .pt{display:block;font-weight:600;font-size:14px;line-height:1.3;transition:color .18s}
.blog-index .pop:hover .pt{color:var(--brand-deep)}
.blog-index .pop .pm{display:block;font-size:12px;color:var(--ink-3);margin-top:4px}
.blog-index .nl{background:linear-gradient(150deg,#2A211A,#171310);color:#EDE6DC;border:none}
.blog-index .nl h4{color:#fff}
.blog-index .nl p{font-size:13.5px;color:#A89E92;margin-bottom:14px;line-height:1.6}
.blog-index .nl .ip{display:flex;flex-direction:column;gap:9px}
.blog-index .nl input{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:11px;padding:11px 14px;color:#fff;font-size:14px}
.blog-index .nl input::placeholder{color:#7E766C}
.blog-index .nl input:focus{outline:none;border-color:var(--brand)}
.blog-index .nl button{background:var(--brand);color:#fff;font-weight:700;border-radius:11px;padding:11px;font-size:14px;transition:.2s;cursor:pointer}
.blog-index .nl button:hover{background:var(--brand-deep)}
.blog-index .tagcloud{display:flex;flex-wrap:wrap;gap:8px}
.blog-index .tagcloud a{font-size:13px;font-weight:500;background:var(--bg);border:1px solid var(--line);padding:6px 13px;border-radius:30px;color:var(--ink-2);transition:.16s}
.blog-index .tagcloud a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}

/* ---------- Pagination (archive) ---------- */
.blog-index .vts-pagination{margin:36px 0 10px}
.blog-index .vts-pagination .nav-links{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.blog-index .vts-pagination .page-numbers{min-width:42px;height:42px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;border:1.5px solid var(--line-2);border-radius:11px;font-weight:600;font-size:14px;color:var(--ink-2);background:var(--surface);transition:.16s}
.blog-index .vts-pagination .page-numbers:hover{border-color:var(--ink);color:var(--ink)}
.blog-index .vts-pagination .page-numbers.current{background:var(--ink);color:#fff;border-color:var(--ink)}
.blog-index .vts-pagination .page-numbers.dots{border:none;background:none}

/* ---------- Responsive ---------- */
@media(max-width:1080px){
  .blog-index .layout{grid-template-columns:1fr}
  .blog-index .side{position:static;display:grid;grid-template-columns:1fr 1fr}
}
@media(max-width:820px){
  .blog-index .featured{grid-template-columns:1fr}
  .blog-index .featured .cv{min-height:200px}
}
@media(max-width:620px){
  .blog-index .pgrid{grid-template-columns:1fr}
  .blog-index .side{grid-template-columns:1fr}
}