:root{
  --bg:#f7f8fa; --card:#ffffff; --text:#1a2233; --muted:#5b6678;
  --brand:#13386b; --brand2:#1f6feb; --accent:#0fb9a6; --line:#e6e9ef;
  --shadow:0 6px 24px rgba(20,40,80,.08);
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* Header */
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.3px;color:var(--brand)}
.brand .dot{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:#fff;font-size:15px}
.menu{display:flex;gap:26px;font-size:14.5px;font-weight:600;color:var(--muted)}
.menu a:hover{color:var(--brand2)}
.search{border:1px solid var(--line);border-radius:30px;padding:8px 14px;font-size:13px;color:var(--muted);background:#fff}

/* Hero */
.hero{background:linear-gradient(180deg,#eef3fb 0%,var(--bg) 100%);padding:54px 0 40px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.45fr .85fr;gap:40px;align-items:center}
.hero h1{font-size:42px;line-height:1.12;font-weight:800;color:var(--brand);letter-spacing:-.5px}
.hero h1 span{color:var(--brand2)}
.hero p.lead{margin-top:16px;font-size:17px;color:var(--muted);max-width:560px}
.chips{margin-top:22px;display:flex;flex-wrap:wrap;gap:9px}
.chip{font-size:13px;font-weight:600;color:var(--brand);background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:30px;transition:.15s}
.chip:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-1px)}
.portrait{justify-self:center;position:relative}
.portrait img{width:260px;height:320px;object-fit:cover;border-radius:18px;box-shadow:var(--shadow);border:5px solid #fff}
.portrait .ph{width:260px;height:320px;border-radius:18px;background:linear-gradient(135deg,#d9e2f2,#c3d0e8);display:grid;place-items:center;color:#7d8aa3;font-size:14px;text-align:center;box-shadow:var(--shadow);border:5px solid #fff}
.portrait .badge{position:absolute;bottom:-18px;left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;padding:8px 20px;text-align:center;white-space:nowrap;display:flex;flex-direction:column;line-height:1.25}
.portrait .badge b{font-size:15px;font-weight:800;color:var(--brand)}
.portrait .badge small{font-size:11.5px;font-weight:600;color:var(--muted);letter-spacing:.3px}

/* Section */
.section{padding:46px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:24px}
.section-head h2{font-size:24px;font-weight:800;color:var(--brand)}
.section-head .line{flex:1;height:1px;background:var(--line);margin:0 18px 8px}

/* Post grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(20,40,80,.13)}
.card .thumb{aspect-ratio:16/9;overflow:hidden;background:#eef1f6}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .thumb img{transform:scale(1.05)}
.card .body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:9px;flex:1}
.tag{align-self:flex-start;font-size:11.5px;font-weight:700;text-transform:uppercase;letter-spacing:.4px;color:var(--brand2);background:#eaf1fe;padding:4px 10px;border-radius:20px}
.card h3{font-size:18px;font-weight:700;line-height:1.35;color:var(--text)}
.card h3:hover{color:var(--brand2)}
.card .excerpt{font-size:14px;color:var(--muted);flex:1}
.card .meta{font-size:12.5px;color:#90a;color:var(--muted);display:flex;gap:10px;align-items:center;border-top:1px solid var(--line);padding-top:11px;margin-top:4px}

/* Article page */
.article{max-width:760px;margin:40px auto;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.article .hero-img{aspect-ratio:21/9;object-fit:cover;width:100%}
.article .content{padding:34px 40px 46px}
.article .tag{margin-bottom:12px}
.article h1{font-size:30px;line-height:1.25;color:var(--brand);margin-bottom:8px}
.article .pmeta{font-size:13px;color:var(--muted);margin-bottom:24px;border-bottom:1px solid var(--line);padding-bottom:16px}
.article .content h2{font-size:21px;color:var(--brand);margin:26px 0 10px}
.article .content p{margin:12px 0;font-size:16px}
.article .content blockquote{border-left:4px solid var(--accent);background:#f1faf8;padding:12px 18px;margin:18px 0;border-radius:8px;color:#13564e}
.article .back{display:inline-block;margin:24px 0;color:var(--brand2);font-weight:600;font-size:14px}

/* Audio / Sách nói */
.thumb.audiocover{display:grid;place-items:center;font-size:54px;background:linear-gradient(135deg,#13386b,#1f6feb);color:#fff}
.article .listen{background:#f1faf8;border:1px solid #d6efe9;border-radius:12px;padding:14px 16px;margin:6px 0 24px}
.article .listen-lbl{font-size:14px;font-weight:700;color:#0d7d6e;margin-bottom:10px}
.article .player{width:100%;height:42px;outline:none}
.card .thumb{position:relative}
.card .thumb .spk{position:absolute;top:8px;right:8px;background:rgba(15,185,166,.95);color:#fff;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:14px;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.article .srcnote{margin:26px 0 6px;padding-top:14px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted)}
.article .srcnote a{color:var(--brand2);font-weight:600}

/* Card cover khong anh -> gradient + icon theo chu de */
.thumb.catcover{display:grid;place-items:center;font-size:50px;color:#fff;text-shadow:0 2px 10px rgba(0,0,0,.18)}

/* Khu vuc chon chuyen muc tren trang chu */
.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.cattile{position:relative;overflow:hidden;border-radius:16px;padding:22px 18px;min-height:140px;display:flex;flex-direction:column;justify-content:flex-end;gap:4px;color:#fff;background:linear-gradient(135deg,var(--c1),var(--c2));box-shadow:var(--shadow);transition:.2s}
.cattile:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(20,40,80,.2)}
.cattile .ci{position:absolute;top:8px;right:10px;font-size:64px;opacity:.28;line-height:1}
.cattile .cn{font-size:17px;font-weight:800;position:relative;z-index:1}
.cattile .cc{font-size:12.5px;font-weight:600;opacity:.9}

/* Hero trang chuyen muc: hinh nen gradient + hoa van + icon watermark */
.cathero{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;padding:46px 0 40px}
.cathero-bg{position:absolute;inset:0;opacity:.5;background:
  radial-gradient(circle at 12% 20%,rgba(255,255,255,.25),transparent 38%),
  radial-gradient(circle at 85% 75%,rgba(255,255,255,.18),transparent 40%),
  radial-gradient(circle at 60% 10%,rgba(255,255,255,.12),transparent 30%)}
.cathero-icon{position:absolute;right:2%;top:50%;transform:translateY(-50%);font-size:230px;line-height:1;opacity:.14;filter:drop-shadow(0 6px 18px rgba(0,0,0,.25));pointer-events:none}
.cathero-in{position:relative;z-index:1}
.cathero .crumb{display:inline-block;color:#fff;opacity:.9;font-size:13.5px;font-weight:600;margin-bottom:14px}
.cathero .crumb:hover{opacity:1}
.cathero-ico{width:74px;height:74px;border-radius:20px;background:rgba(255,255,255,.18);backdrop-filter:blur(4px);display:grid;place-items:center;font-size:40px;margin-bottom:14px;border:1px solid rgba(255,255,255,.25)}
.cathero h1{font-size:36px;font-weight:800;letter-spacing:-.5px}
.cathero p{margin-top:8px;font-size:16px;opacity:.95;max-width:560px}
.cathero .cbadge{display:inline-block;margin-top:16px;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.3);padding:6px 16px;border-radius:30px;font-size:13px;font-weight:700}
.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:40px;font-size:15px}
@media(max-width:560px){.cathero-icon{font-size:150px;opacity:.1}.cathero h1{font-size:28px}}

/* Danh sach chuong sach noi */
.chaplist{display:flex;flex-direction:column;gap:12px;margin:18px 0}
.chap{background:#f1faf8;border:1px solid #d6efe9;border-radius:12px;padding:12px 16px}
.chap .chap-t{display:block;font-size:14.5px;font-weight:700;color:#0d7d6e;margin-bottom:8px}
.chap .player{width:100%;height:40px;outline:none}

/* Footer */
footer.site{background:var(--brand);color:#cdd8ea;margin-top:30px;padding:40px 0 30px;font-size:14px}
footer .ft{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;align-items:center}
footer .ft b{color:#fff}
footer a{color:#cdd8ea}footer a:hover{color:#fff}

@media(max-width:880px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .portrait{order:-1}.chips{justify-content:center}.hero p.lead{margin-left:auto;margin-right:auto}
  .grid{grid-template-columns:1fr 1fr}.menu{display:none}
}
@media(max-width:560px){.grid{grid-template-columns:1fr}.hero h1{font-size:32px}.article .content{padding:24px 22px}}