:root{
  --brand:#7a1f45; --brand-2:#b8336a; --rose:#f2a7c3; --blush:#fdf1f5;
  --ink:#1d1a1c; --ink-2:#4a4447; --muted:#8a8286; --line:#ece6e9; --dark:#1f1419;
  --van-dong:#c2410c; --cam-xuc:#7c3aed; --tu-chu:#0f766e; --khoi-nghiep:#1d4ed8; --phong-cach:#be185d; --gia-dinh:#4d7c0f; --cong-nghe:#4338ca; --chan-dung:#a16207;
  --pillar:var(--brand); --pillar-bg:var(--blush);
  --serif:'Playfair Display',Georgia,serif; --sans:'Be Vietnam Pro',system-ui,sans-serif;
}
body.vd{--pillar:var(--van-dong);--pillar-bg:#fff3ec}
body.cx{--pillar:var(--cam-xuc);--pillar-bg:#f4efff}
body.tc{--pillar:var(--tu-chu);--pillar-bg:#ebf7f5}
body.kn{--pillar:var(--khoi-nghiep);--pillar-bg:#eef3ff}
body.pc{--pillar:var(--phong-cach);--pillar-bg:#fdf0f6}
body.gd{--pillar:var(--gia-dinh);--pillar-bg:#f2f8e8}
body.ai{--pillar:var(--cong-nghe);--pillar-bg:#eef0ff}
body.cd{--pillar:var(--chan-dung);--pillar-bg:#fbf6ec}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--sans);color:var(--ink);background:#fff;line-height:1.5;font-size:15px}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;object-fit:cover;background:var(--blush)}
.wrap{max-width:1200px;margin:0 auto;padding:0 16px}

header.main{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
header.main .wrap{display:flex;align-items:center;gap:28px;height:64px}
.logo{display:flex;align-items:baseline;gap:8px;white-space:nowrap}
.logo b{font-family:var(--serif);font-size:27px;font-weight:800;color:var(--brand);letter-spacing:-.5px;line-height:1}
.logo span{font-family:var(--serif);font-style:italic;font-size:15px;color:var(--brand-2)}
nav.menu{display:flex;gap:22px;flex:1;overflow-x:auto;scrollbar-width:none}
nav.menu::-webkit-scrollbar{display:none}
nav.menu a{font-weight:600;font-size:14px;white-space:nowrap;padding:22px 0;border-bottom:3px solid transparent}
nav.menu a:hover{color:var(--brand);border-color:var(--brand)}
.btn-try{flex:none;background:var(--brand);color:#fff;font-weight:600;font-size:13px;padding:9px 14px;border-radius:999px;white-space:nowrap}

/* Bài viết */
.crumb{font-size:13px;color:var(--muted);padding:20px 0 0}
.crumb a{color:var(--pillar);font-weight:600}
.art-head{max-width:760px;margin:0 auto;padding:16px 0 24px}
.art-head .k{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--pillar);margin-bottom:10px}
.art-head h1{font-family:var(--serif);font-size:40px;line-height:1.18;font-weight:700;margin-bottom:14px}
.art-head .sapo{font-size:18px;color:var(--ink-2);line-height:1.55;font-weight:500}
.byline{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center;font-size:13px;color:var(--muted);margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.byline b{color:var(--ink)}
.cover{max-width:1000px;margin:0 auto 8px}
.cover img{aspect-ratio:16/8;border-radius:8px}
.cover figcaption{font-size:12px;color:var(--muted);text-align:center;margin-top:6px}

.layout{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:48px;justify-content:center;padding:28px 0 40px}
article.body{font-size:17px;line-height:1.75}
article.body p{margin:0 0 18px}
article.body h2{font-family:var(--serif);font-size:26px;line-height:1.25;margin:34px 0 12px;color:var(--ink)}
article.body h3{font-size:18px;margin:22px 0 8px}
article.body ul,article.body ol{margin:0 0 18px 22px}
article.body li{margin-bottom:8px}
article.body strong{color:var(--ink)}
article.body blockquote{border-left:4px solid var(--pillar);background:var(--pillar-bg);padding:16px 20px;margin:24px 0;font-family:var(--serif);font-size:20px;font-style:italic;line-height:1.45;border-radius:0 6px 6px 0}
.box{background:var(--pillar-bg);border-radius:8px;padding:18px 22px;margin:24px 0;font-size:15px;line-height:1.65}
.box h4{font-size:15px;color:var(--pillar);margin-bottom:6px;text-transform:uppercase;letter-spacing:.04em}
.box ul{margin-bottom:0}
.box.warn{background:#fff7e6;border:1px solid #f5d38a}
.box.warn h4{color:#a15c00}
table.t{width:100%;border-collapse:collapse;margin:8px 0 22px;font-size:15px}
table.t th,table.t td{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;vertical-align:top}
table.t th{background:var(--pillar-bg);color:var(--pillar);font-size:13px;text-transform:uppercase;letter-spacing:.04em}
.sources{font-size:13px;color:var(--ink-2);border-top:1px solid var(--line);margin-top:32px;padding-top:16px;line-height:1.6}
.sources h4{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:8px}
.sources ol{margin-left:18px}
.sources a{color:var(--pillar);word-break:break-word}

.cta-in{border-radius:10px;padding:22px 24px;margin:32px 0;background:var(--pillar);color:#fff}
.cta-in h3{font-family:var(--serif);font-size:22px;margin:0 0 6px}
.cta-in p{opacity:.92;margin:0 0 14px;font-size:15px;line-height:1.6}
.cta-in a{display:inline-block;background:#fff;color:var(--pillar);font-weight:700;padding:10px 18px;border-radius:6px;margin:0 8px 8px 0;font-size:15px}
.cta-in a.ghost{background:transparent;color:#fff;border:1.5px solid #fff}

aside.side{position:sticky;top:88px;align-self:start}
aside.side h4{font-family:var(--serif);font-size:18px;color:var(--brand);border-bottom:2px solid var(--brand);padding-bottom:6px;margin-bottom:10px}
aside.side a.rel{display:block;padding:10px 0;border-bottom:1px solid var(--line);font-weight:600;font-size:14px;line-height:1.4}
aside.side a.rel:hover{color:var(--brand-2)}
aside.side a.rel small{display:block;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;margin-bottom:2px}
.promo{background:var(--dark);color:#fff;border-radius:8px;padding:18px;margin-top:22px}
.promo small{color:var(--rose);font-weight:700;font-size:11px;letter-spacing:.08em;text-transform:uppercase}
.promo h3{font-family:var(--serif);font-size:19px;line-height:1.25;margin:6px 0 8px}
.promo p{font-size:13px;opacity:.85;margin-bottom:12px}
.promo a{display:block;text-align:center;background:var(--rose);color:var(--dark);font-weight:700;padding:10px;border-radius:6px}

footer{background:var(--dark);color:#cdbfc5;padding:28px 0;font-size:13px}
footer .wrap{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
footer a:hover{color:var(--rose)}

@media (max-width:960px){
  .layout{grid-template-columns:1fr}
  aside.side{position:static}
}
@media (max-width:720px){
  header.main .wrap{gap:14px}
  .logo span,.btn-try{display:none}
  .logo b{font-size:21px}
  .art-head h1{font-size:28px}
  .art-head .sapo{font-size:16px}
  article.body{font-size:16px}
  .cover img{aspect-ratio:16/10;border-radius:0}
  table.t{font-size:14px}
}