/* =========================================================
   Thư viện template giao diện — style.css
   Trang chủ ở gốc repo, liệt kê các template con.
   Khác các site con: trang này dùng <img loading="lazy"> cho ảnh
   preview thay vì biến --img, để ảnh dưới màn hình không tải sớm.
   ========================================================= */

:root{
  --ink:#12151A;
  --ink-2:#1B1F26;
  --ink-3:#272C35;
  --line:#2E343E;
  --text:#E7EAEE;
  --muted:#98A2B0;
  --white:#fff;
  --radius:12px;
  --radius-lg:18px;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  --shadow-lg:0 24px 60px rgba(0,0,0,.45);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;
  color:var(--text);background:var(--ink);font-size:14px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round;flex:none}

.container{width:min(1180px,100% - 32px);margin-inline:auto}

/* ---------- Nút ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius);
  font-weight:700;font-size:13px;transition:.18s;white-space:nowrap}
.btn svg{width:16px;height:16px}
.btn--brand{background:var(--brand);color:#fff}
.btn--brand:hover{background:var(--brand-deep)}
.btn--ghost{border:1px solid var(--line);color:var(--text)}
.btn--ghost:hover{background:var(--ink-3);border-color:#3C4451}
.btn--mute{border:1px dashed var(--line);color:var(--muted);cursor:not-allowed}

/* ---------- Header ---------- */
.header{position:sticky;top:0;z-index:50;background:rgba(18,21,26,.85);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header__in{display:flex;align-items:center;gap:20px;min-height:66px}
.logo{display:flex;align-items:center;gap:11px}
.logo__mark{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;flex:none;
  background:conic-gradient(from 210deg,#3A8B3F,#8B6B4A,#E85D8A,#0B5CA8,#3A8B3F);
  color:#fff;font-weight:800;font-size:14px;letter-spacing:.5px}
.logo__text b{display:block;font-family:'Playfair Display',serif;font-size:18px;
  letter-spacing:.6px;line-height:1.15}
.logo__text small{display:block;font-size:8.5px;letter-spacing:1.7px;color:var(--muted);font-weight:600}
.header__nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.header__nav a{padding:9px 13px;border-radius:8px;font-size:13px;font-weight:600;
  color:var(--muted);transition:.15s}
.header__nav a:hover{color:var(--text);background:var(--ink-3)}

/* ---------- Hero ---------- */
.hero{padding:72px 0 52px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-40% 20% auto -10%;height:520px;
  background:radial-gradient(closest-side,rgba(58,139,63,.20),transparent 70%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:-30% -10% auto 40%;height:520px;
  background:radial-gradient(closest-side,rgba(232,93,138,.18),transparent 70%);pointer-events:none}
.hero__in{position:relative;z-index:1;max-width:720px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border-radius:999px;
  border:1px solid var(--line);background:var(--ink-2);
  font-size:11px;font-weight:700;letter-spacing:1.3px;text-transform:uppercase;color:var(--muted)}
.eyebrow svg{width:14px;height:14px;color:#8CC63F}
.hero h1{font-family:'Playfair Display',serif;font-weight:600;font-size:clamp(30px,5vw,50px);
  line-height:1.15;margin:18px 0 14px;letter-spacing:-.5px}
.hero h1 em{font-style:italic;background:linear-gradient(100deg,#8CC63F,#F2A6C0 55%,#5FA8E0);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{color:var(--muted);font-size:15px;max-width:600px}

.stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:32px;padding-top:28px;
  border-top:1px solid var(--line)}
.stat b{display:block;font-family:'Playfair Display',serif;font-size:30px;line-height:1}
.stat small{display:block;margin-top:5px;font-size:11.5px;letter-spacing:.7px;
  text-transform:uppercase;color:var(--muted);font-weight:600}

/* ---------- Lưới template ---------- */
.section{padding:56px 0}
.section__head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section__title{font-family:'Playfair Display',serif;font-weight:600;font-size:26px}
.section__head p{color:var(--muted);font-size:13px;margin-top:4px}

.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

.card{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;display:flex;flex-direction:column;transition:.22s}
.card:hover{border-color:var(--brand);box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.card--soon:hover{transform:none;border-color:var(--line);box-shadow:none}

.card__media{position:relative;aspect-ratio:2/1;overflow:hidden;background:var(--ink-3)}
.card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .card__media img{transform:scale(1.04)}
.card__media::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 35%,rgba(18,21,26,.85) 100%)}
.card--soon .card__media img{filter:grayscale(1) brightness(.5)}

.card__badge{position:absolute;top:14px;left:14px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;padding:5px 11px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:11px;font-weight:700;letter-spacing:.4px}
.card__badge--soon{background:var(--ink-3);color:var(--muted);border:1px solid var(--line)}
.card__swatch{position:absolute;bottom:14px;right:14px;z-index:2;display:flex;gap:5px}
.card__swatch span{width:17px;height:17px;border-radius:50%;border:2px solid rgba(255,255,255,.85)}

.card__body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card__body h3{font-family:'Playfair Display',serif;font-size:21px;font-weight:600}
.card__cat{display:block;margin:3px 0 12px;font-size:11.5px;letter-spacing:1.1px;
  text-transform:uppercase;color:var(--brand-soft);font-weight:700}
.card__desc{color:var(--muted);font-size:13px}

.pages{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0 20px}
.pages span{padding:4px 10px;border-radius:7px;background:var(--ink-3);
  border:1px solid var(--line);font-size:11.5px;color:var(--muted)}

.card__foot{display:flex;align-items:center;gap:10px;margin-top:auto}
.card__foot .btn{flex:1}
.card__meta{font-size:11.5px;color:var(--muted);white-space:nowrap}

/* Nút yêu thích + lượt xem, đứng cạnh nút Xem demo */
.fav,.views{flex:none;display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 13px;
  border-radius:var(--radius);border:1px solid var(--line);background:var(--ink-3);color:var(--muted);
  font:700 13px/1 inherit;font-family:inherit}
.fav svg,.views svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.fav b,.views b{color:var(--text);font-weight:700}
.fav{cursor:pointer;transition:.15s}
.fav svg{transition:transform .2s}
.fav:hover{color:#FF5A79;border-color:rgba(255,90,121,.5)}
.fav.is-on{color:#FF5A79;border-color:rgba(255,90,121,.55);background:rgba(255,90,121,.1)}
.fav.is-on svg{fill:currentColor}
.fav.pop svg{transform:scale(1.35)}
.fav:disabled{opacity:.6;cursor:wait}
@media (max-width:520px){.card__foot{flex-wrap:wrap}.card__meta{width:100%;order:3}}

/* ---------- Tìm kiếm + lọc chủ đề ---------- */
.filter{position:sticky;top:66px;z-index:40;margin:0 0 26px;padding:14px 0 12px;
  background:rgba(18,21,26,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.search{display:flex;align-items:center;gap:10px;padding:0 14px;height:48px;border-radius:var(--radius);
  background:var(--ink-2);border:1px solid var(--line);transition:.15s}
.search:focus-within{border-color:#8CC63F;box-shadow:0 0 0 3px rgba(140,198,63,.15)}
.search svg{color:var(--muted)}
.search input{flex:1;min-width:0;height:100%;background:none;border:0;outline:0;color:var(--text);font:inherit;font-size:14px}
.search input::placeholder{color:var(--muted)}
.search input::-webkit-search-cancel-button{filter:invert(1) opacity(.5)}
.search kbd{font:600 11px/1 system-ui,sans-serif;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:4px 7px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.chip{flex:none;display:inline-flex;align-items:center;gap:7px;padding:8px 14px;border-radius:999px;cursor:pointer;
  background:var(--ink-2);border:1px solid var(--line);color:var(--muted);font:600 12.5px/1 inherit;font-family:inherit;transition:.15s}
.chip i{font-style:normal;font-size:11px;padding:2px 6px;border-radius:999px;background:var(--ink-3);color:var(--muted)}
.chip:hover{color:var(--text);border-color:#3C4451}
.chip.is-active{background:var(--text);border-color:var(--text);color:var(--ink)}
.chip.is-active i{background:var(--ink);color:var(--text)}
.filter__count{margin-top:10px;font-size:12px;color:var(--muted)}
.card[hidden]{display:none}
.empty{padding:48px 0;text-align:center;color:var(--muted)}
.empty button{margin-left:6px;background:none;border:0;color:#8CC63F;font:inherit;font-weight:700;cursor:pointer;text-decoration:underline}
@media (max-width:760px){.filter{position:static}.search kbd{display:none}.search input{font-size:16px}}

/* ---------- Điểm chung ---------- */
.notes{background:var(--ink-2);border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px}
.notes__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:22px}
.note{display:flex;gap:13px}
.note__ic{width:36px;height:36px;border-radius:9px;flex:none;display:grid;place-items:center;
  background:var(--ink-3);border:1px solid var(--line);color:#8CC63F}
.note b{display:block;font-size:13.5px;margin-bottom:3px}
.note small{display:block;color:var(--muted);font-size:12.5px;line-height:1.55}
.note code{background:var(--ink-3);border:1px solid var(--line);border-radius:5px;
  padding:1px 5px;font-size:11.5px;color:var(--text)}

/* ---------- Footer ---------- */
.footer{border-top:1px solid var(--line);padding:26px 0;margin-top:34px}
.footer__in{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:var(--muted);font-size:12.5px}
.footer code{background:var(--ink-3);border:1px solid var(--line);border-radius:6px;
  padding:2px 7px;font-size:11.5px}

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .notes__grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:980px){
  .hero{padding:52px 0 40px}
  .stats{gap:26px}
}
@media (max-width:900px){
  .cards{grid-template-columns:1fr}
  .header__nav{display:none}
}
@media (max-width:640px){
  .section{padding:40px 0}
  .notes{padding:22px}
  .notes__grid{grid-template-columns:1fr}
  .section__head{flex-direction:column;align-items:flex-start}
  .stat b{font-size:25px}
  .card__foot{flex-wrap:wrap}
  .card__foot .btn{flex:1 1 100%}
  .card__meta{white-space:normal}
}