/* Giao diện "Tạp chí" — bố cục kiểu claude.vn: nền kem, màu đất nung, tiêu đề serif */
:root{
  --p:#1d4289;--p2:#13306a;--p-soft:#1d428914;--p-line:#1d428933;
  --ink:#0f1b33;--t2:#44506a;--muted:#5f6b82;--faint:#8a94a8;
  --page:#f5f7fb;--card:#ffffff;--muted-bg:#edf1f7;--code:#eef2f8;
  --line:#0f1b3314;--line2:#0f1b330d;--line3:#0f1b331f;
  --sh:0 1px 2px #0f1b330d,0 1px 1px #0f1b3308;--sh-md:0 2px 4px #0f1b330f,0 5px 12px #0f1b3314;
  --serif:"Source Serif 4",Georgia,"Merriweather",serif;--sans:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"JetBrains Mono","SF Mono",Consolas,monospace;
  --max:1280px;--gut:24px;--r:12px
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:80px}
body{margin:0;background:var(--page);color:var(--ink);font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.serif{font-family:var(--serif)}

/* ---------- Header ---------- */
.hd{position:sticky;top:0;z-index:30;height:60px;background:#ffffffeb;backdrop-filter:blur(12px);border-bottom:.5px solid var(--line)}
.hd .wrap{height:100%;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:9px;flex:none}
.logo img{width:32px;height:32px;object-fit:contain}
.logo b{font:700 25px/1 var(--serif);letter-spacing:-.02em}
.logo i{font:600 15px/1 var(--serif);font-style:normal;color:var(--p);border:1.5px solid var(--p);border-radius:4px;padding:1px 4px 3px;margin-left:2px;transform:translateY(-4px)}
.nav{display:flex;gap:2px;min-width:0;overflow:hidden}
.nav a{padding:7px 10px;border-radius:8px;font-size:14.5px;color:var(--ink);white-space:nowrap}
.nav a:hover,.nav a.on{color:var(--p)}
.hd .acts{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;color:var(--t2)}
.icon-btn:hover{background:var(--muted-bg)}
.icon-btn svg{width:19px;height:19px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:38px;padding:0 18px;border-radius:999px;font-weight:600;font-size:14px;border:1px solid var(--line3);background:var(--card);color:var(--ink);cursor:pointer;transition:.15s;white-space:nowrap}
.btn:hover{border-color:var(--p);color:var(--p)}
.btn.pri{background:var(--p);border-color:var(--p);color:#fff}.btn.pri:hover{background:var(--p2);color:#fff}
.btn.out{border-color:var(--p);color:var(--p);background:transparent;height:30px;padding:0 14px;font-weight:500;font-size:13px}
.menu-btn{display:none}

/* ---------- Thanh tin mới ---------- */
.ticker{margin:16px 0 18px;display:flex;align-items:center;gap:14px;height:44px;padding:0 8px;background:var(--card);border:.5px solid var(--line);border-radius:999px;box-shadow:var(--sh)}
.ticker .new{display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 12px;border-radius:999px;background:var(--p-soft);color:var(--p);font-size:12.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;flex:none}
.ticker .new svg{width:13px;height:13px}
.ticker .cat{font-size:12px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);flex:none}
.ticker a.t{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ticker a.t:hover{color:var(--p)}

/* ---------- Ảnh / nhãn ---------- */
.thumb{position:relative;display:block;overflow:hidden;border-radius:8px;background:var(--muted-bg)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
a:hover>.thumb img,.thumb:hover img{transform:scale(1.03)}
.ph{width:100%;height:100%;display:grid;place-items:center;color:#fff;font:700 32px/1 var(--serif);letter-spacing:-.02em;background:linear-gradient(135deg,var(--c1,#1d4289),var(--c2,#2f6fd6))}
.tag{position:absolute;left:10px;top:10px;z-index:1;font-size:12px;font-weight:600;color:#fff;background:var(--p);padding:3px 9px;border-radius:6px}
.tag.dark{background:#0f1b33b3;backdrop-filter:blur(4px)}
.chip{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;border:.5px solid var(--line3);background:#f1f4f9;font-size:12px;color:var(--t2);white-space:nowrap}
.chip:hover{color:var(--p);border-color:var(--p-line)}

/* ---------- Avatar ---------- */
.av{display:inline-grid;place-items:center;flex:none;border-radius:50%;overflow:hidden;color:#fff;font-weight:700;background:var(--p)}
.av img{width:100%;height:100%;object-fit:cover}
.av.s{width:20px;height:20px;font-size:8.5px}.av.m{width:38px;height:38px;font-size:13px}.av.l{width:96px;height:96px;font-size:32px;box-shadow:0 0 0 4px #fff,var(--sh-md)}

/* ---------- Hero ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(0,.98fr) minmax(0,.98fr);gap:14px;margin-bottom:22px}
.hero .big{position:relative;min-height:312px;border-radius:var(--r);overflow:hidden;background:#222;color:#fff}
.hero .big .thumb{position:absolute;inset:0;border-radius:0}
.hero .big::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,#000000c7)}
.hero .big .in{position:absolute;left:24px;right:24px;bottom:22px;z-index:2}
.hero .big h2{margin:10px 0 8px;font:700 24px/1.3 var(--serif);letter-spacing:-.015em;max-width:560px}
.hero .big small{color:#ffffffbf;font-size:13.5px}
.lbl{display:inline-block;font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:6px;background:#0f1b33b3;color:#fff}
.hero .mid{display:grid;grid-template-rows:1fr 1fr;gap:12px}
.hero .sm{position:relative;border-radius:var(--r);overflow:hidden;background:#222;color:#fff;min-height:150px}
.hero .sm .thumb{position:absolute;inset:0;border-radius:0}
.hero .sm::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,#000000b3)}
.hero .sm .in{position:absolute;left:14px;right:14px;bottom:12px;z-index:2}
.hero .sm h3{margin:6px 0 0;font-size:14px;font-weight:600;line-height:1.4}
.hero .tall{display:flex;flex-direction:column;border-radius:var(--r);overflow:hidden;background:var(--card);border:.5px solid var(--line);box-shadow:var(--sh)}
.hero .tall .thumb{height:150px;border-radius:0}
.hero .tall .tag svg{width:10px;height:10px;margin-right:4px}
.hero .tall .in{padding:16px;display:flex;flex-direction:column;flex:1}
.hero .tall h3{margin:0;font-size:15px;font-weight:600;line-height:1.45}
.hero .tall .foot{margin-top:auto;display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}
.hero .tall .foot a{color:var(--p)}

/* ---------- Bố cục 2 cột ---------- */
.cols{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;align-items:start}
.side{display:grid;gap:16px;position:sticky;top:76px}

/* ---------- Tab ---------- */
.tabs{display:flex;gap:4px;border-bottom:.5px solid var(--line);margin:0 0 14px;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);padding:0 10px}
.tabs a,.tabs span{padding:12px 12px 11px;font-size:13.5px;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-.5px}
.tabs .on{color:var(--p);border-bottom-color:var(--p);font-weight:500}

/* ---------- Bài trong danh sách ---------- */
.feed{display:grid;gap:14px}
.row{display:grid;grid-template-columns:206px minmax(0,1fr);gap:20px;padding:16px;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);transition:box-shadow .2s}
.row:hover{box-shadow:var(--sh-md)}
.row .thumb{height:142px}
.row h3{margin:2px 0 8px;font:700 20px/1.35 var(--serif);letter-spacing:-.015em}
.row h3 a:hover{color:var(--p)}
.row p{margin:0 0 12px;color:var(--muted);font-size:14px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--faint)}
.meta a:hover{color:var(--p)}
.meta .sep{opacity:.6}
.meta .grow{flex:1}
.meta svg{width:13px;height:13px;vertical-align:-2px;margin-right:3px}
.more-btn{display:flex;justify-content:center;margin:20px 0 6px}

/* ---------- Widget thanh bên ---------- */
.w{background:var(--card);border:.5px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);overflow:hidden}
.w-h{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 0}
.w-h h4{margin:0;font-size:15px;font-weight:600;padding-bottom:9px;border-bottom:2px solid var(--p)}
.w-h a{font-size:12.5px;color:var(--muted)}.w-h a:hover{color:var(--p)}
.w-b{padding:6px 16px 14px;border-top:.5px solid var(--line)}
.w-auth{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:.5px solid var(--line2)}
.w-auth:last-child{border:0}
.w-auth b{display:block;font-size:14px;font-weight:600}.w-auth small{display:block;color:var(--muted);font-size:12px;line-height:1.4}
.w-auth .btn.out{margin-left:auto}
.w-num{display:grid;grid-template-columns:72px minmax(0,1fr);gap:12px;align-items:center;padding:10px 0;border-bottom:.5px solid var(--line2)}
.w-num:last-child{border:0}
.w-num .thumb{height:52px;border-radius:6px}
.w-num .n{position:absolute;left:4px;top:4px;z-index:1;min-width:18px;height:18px;border-radius:5px;background:var(--p);color:#fff;font-size:11px;font-weight:700;display:grid;place-items:center}
.w-num span{font-size:13.5px;line-height:1.45;font-weight:500}
.w-num:hover span{color:var(--p)}
.w-link{display:block;padding:11px 0;border-bottom:.5px solid var(--line2);font-size:14px;line-height:1.45}
.w-link:last-child{border:0}.w-link:hover{color:var(--p)}
.w-link small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.w-cta{padding:18px 16px;background:var(--p);color:#fff}
.w-cta small{display:block;font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;opacity:.85}
.w-cta b{display:block;margin:6px 0 12px;font:700 19px/1.35 var(--serif)}
.w-cta .btn{background:#fff;color:var(--p);border-color:#fff;height:34px}

/* ---------- Chuyên đề ---------- */
.sec-h{display:flex;align-items:baseline;justify-content:space-between;margin:48px 0 16px}
.sec-h h2{margin:0;font:700 22px/1.3 var(--serif);letter-spacing:-.015em}
.sec-h a{font-size:13px;color:var(--muted)}.sec-h a:hover{color:var(--p)}
.colls{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.coll{display:flex;flex-direction:column;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:.2s}
.coll:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.coll .cimg{position:relative;aspect-ratio:16/10;display:grid;place-items:center;color:#fff;overflow:hidden}
.coll .cimg svg{width:76px;height:76px;stroke-width:1.2;opacity:.95}
.coll .cimg .cnt{position:absolute;left:12px;bottom:10px;font-size:12px;font-weight:600}
.coll .cimg .bdg{position:absolute;right:12px;top:10px;font-size:11.5px;font-weight:600;background:#ffffff33;padding:2px 8px;border-radius:6px}
.coll .tx{padding:14px 16px 16px}
.coll h3{margin:0 0 4px;font-size:15px;font-weight:600}
.coll p{margin:0;font-size:13px;color:var(--muted);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.coll .cimg{background:#1d4289}
.coll .c1{background:#13306a}.coll .c2{background:#2c7a7b}.coll .c3{background:#3b82f6}.coll .c4{background:#4f46b8}.coll .c5{background:#2f6fd6}.coll .c6{background:#334e7e}

/* ---------- Đầu trang collection / breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:6px;margin:22px 0 12px;font-size:13.5px;color:var(--muted)}
.crumb b{color:var(--ink);font-weight:600}.crumb a:hover{color:var(--p)}
.crumb svg{width:12px;height:12px;opacity:.6}
.ph-h{padding-bottom:20px;border-bottom:.5px solid var(--line3);margin-bottom:18px}
.ph-h h1{margin:0 0 8px;font:700 30px/1.25 var(--serif);letter-spacing:-.015em}
.ph-h .desc{color:var(--t2);font-size:14.5px}.ph-h .desc p{margin:0}
.ph-h .cnt{margin-top:10px;font-weight:600;font-size:14px;color:var(--t2)}
.pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.pills a{height:34px;display:inline-flex;align-items:center;padding:0 14px;border-radius:999px;background:var(--muted-bg);font-size:13.5px;color:var(--t2)}
.pills a:hover{color:var(--p)}
.pills a.on{background:var(--p-soft);color:var(--p);box-shadow:inset 0 0 0 1px var(--p-line)}
.c-hero{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:14px;margin-bottom:16px}
.c-hero .big{position:relative;min-height:360px;border-radius:var(--r);overflow:hidden;color:#fff;background:#222}
.c-hero .big .thumb{position:absolute;inset:0;border-radius:0}
.c-hero .big::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,#000000b3)}
.c-hero .big h2{position:absolute;left:24px;right:24px;bottom:22px;z-index:2;margin:0;font:700 21px/1.35 var(--serif)}
.c-hero .pair{display:grid;grid-template-rows:1fr 1fr;gap:14px}
.c-hero .hz{display:grid;grid-template-columns:1fr 1fr;border-radius:var(--r);overflow:hidden;background:var(--card);border:.5px solid var(--line);box-shadow:var(--sh)}
.c-hero .hz .thumb{border-radius:0;min-height:172px}
.c-hero .hz .tx{padding:20px;display:flex;align-items:center;font:600 18px/1.5 var(--serif);color:var(--ink)}
.c-hero .hz:nth-child(2) .thumb{order:2}
.c-hero .hz .tx span{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.c-hero a:hover .tx{color:var(--p)}

/* ---------- Tác giả ---------- */
.prof{display:grid;grid-template-columns:96px minmax(0,1fr) auto;gap:24px;align-items:start;padding:24px 0 26px;border-bottom:.5px solid var(--line3)}
.prof h1{display:flex;align-items:center;gap:12px;margin:4px 0 4px;font:700 26px/1.2 var(--serif);letter-spacing:-.015em}
.prof .role{color:var(--muted);font-size:13.5px}
.prof .bio{margin:10px 0 12px;color:var(--t2);font-size:14.5px;max-width:540px}.prof .bio p{margin:0 0 6px}
.socials{display:flex;gap:8px}
.socials a{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--muted-bg);color:var(--t2);border:.5px solid var(--line3)}
.socials a:hover{color:var(--p)}.socials svg{width:15px;height:15px}
.stats{display:flex;gap:30px;text-align:center}
.stats b{display:block;font:700 22px/1.2 var(--serif)}.stats small{font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
.ptabs{display:flex;border-bottom:.5px solid var(--line3);margin:0 0 24px}
.ptabs span{padding:14px 20px 12px;font-size:14px;font-weight:600;border-bottom:2px solid var(--p)}
.ptabs i{font-style:normal;font-weight:400;color:var(--muted);font-size:12.5px;margin-left:4px}
.grid4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.card{display:flex;flex-direction:column;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:box-shadow .2s}
.card:hover{box-shadow:var(--sh-md)}
.card .thumb{height:168px;border-radius:0}
.card .tx{padding:14px 16px 16px}
.card h3{margin:0 0 8px;font:600 15.5px/1.45 var(--serif);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card:hover h3{color:var(--p)}
.people{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.person{display:flex;gap:14px;align-items:center;padding:18px;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.person:hover{box-shadow:var(--sh-md)}
.person b{display:block;font:700 17px/1.3 var(--serif)}.person small{display:block;color:var(--muted);font-size:13px}

/* ---------- Bài viết ---------- */
.art{background:var(--card);border:.5px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:28px 30px 34px}
.art .chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.art .chips a{font-size:11.5px;padding:3px 9px;border-radius:6px;background:#5c8d6e1a;color:#4c7a5e;font-weight:500}
.art .chips a:nth-child(2){background:#3b82f61a;color:#2f6fd6}.art .chips a:nth-child(3){background:#6b5ce71a;color:#5b4ccf}
.art h1{margin:0 0 16px;font:700 30px/1.28 var(--serif);letter-spacing:-.015em}
.byline{display:flex;align-items:center;gap:12px;padding-bottom:18px;margin-bottom:20px;border-bottom:.5px solid var(--line)}
.byline b{font-weight:600;font-size:14.5px}.byline small{display:block;color:var(--faint);font-size:12.5px}
.byline .role{display:inline-block;font-size:11.5px;color:var(--muted);background:var(--muted-bg);padding:1px 8px;border-radius:6px;margin-left:6px}
.cover{width:100%;border-radius:10px;margin:0 0 22px}
.prose{font-size:16.5px;line-height:1.8;color:#1b2740}
.prose h2{font:700 23px/1.35 var(--serif);margin:1.8em 0 .6em;color:var(--ink);letter-spacing:-.01em}
.prose h3{font:700 19px/1.4 var(--serif);margin:1.5em 0 .5em;color:var(--ink)}
.prose p{margin:0 0 1.1em}
.prose a{color:var(--p);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.4em}.prose li{margin:.3em 0}
.prose blockquote{margin:1.4em 0;padding:14px 18px;border-left:3px solid var(--p);background:var(--p-soft);border-radius:0 8px 8px 0;color:var(--t2)}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--code);padding:2px 6px;border-radius:4px}
.prose pre{background:var(--code);border:.5px solid var(--line);border-radius:8px;padding:16px 18px;overflow:auto;font-size:13.5px;line-height:1.7}
.prose pre code{background:none;padding:0}
.prose img{border-radius:10px;margin:1.2em auto}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px}.prose td,.prose th{border:.5px solid var(--line3);padding:8px 10px}
.toc a{display:block;padding:6px 0 6px 12px;border-left:2px solid var(--line);font-size:13px;color:var(--muted);line-height:1.45}
.toc a.h3{padding-left:24px}
.toc a:hover,.toc a.on{color:var(--p);border-left-color:var(--p)}

/* ---------- Phân trang / chân trang ---------- */
.pager{display:flex;gap:6px;justify-content:center;margin:24px 0 8px;flex-wrap:wrap}
.pager a{min-width:38px;height:38px;padding:0 12px;display:grid;place-items:center;border-radius:999px;border:.5px solid var(--line3);background:var(--card);font-size:13.5px}
.pager a.on{background:var(--p);border-color:var(--p);color:#fff}
.pager a:hover:not(.on){color:var(--p);border-color:var(--p)}
.ft{margin-top:72px;background:var(--card);border-top:.5px solid var(--line)}
.ft .top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding:40px var(--gut) 34px}
.ft h5{margin:0 0 14px;font-size:14px;font-weight:600}
.ft p{margin:0;color:var(--muted);font-size:13.5px;line-height:1.7;max-width:420px}
.ft .col a{display:block;margin:0 0 9px;font-size:13.5px;color:var(--muted)}.ft .col a:hover{color:var(--p)}
.ft .col>span{display:block;margin:0 0 9px;font-size:13.5px;color:var(--muted)}
.ft .bt{background:#0f1b33;color:#c3cbd8;font-size:13px}
.ft .bt .wrap{display:flex;gap:22px;flex-wrap:wrap;align-items:center;min-height:46px}
.ft .bt a:hover{color:#fff}
.empty{padding:40px;text-align:center;color:var(--muted);background:var(--card);border:.5px dashed var(--line3);border-radius:var(--r)}

/* ---------- Màn hình nhỏ ---------- */
@media (max-width:1100px){.hero{grid-template-columns:1fr 1fr}.hero .tall{display:none}.cols{grid-template-columns:1fr}.side{position:static}.grid4{grid-template-columns:repeat(3,minmax(0,1fr))}.nav{display:none}.menu-btn{display:grid}}
@media (max-width:760px){:root{--gut:16px}.hero,.c-hero{grid-template-columns:1fr}.hero .big{min-height:260px}.row{grid-template-columns:1fr;gap:12px}.row .thumb{height:190px}
 .colls,.people{grid-template-columns:1fr 1fr}.grid4{grid-template-columns:1fr 1fr}.prof{grid-template-columns:72px 1fr}.prof .av.l{width:72px;height:72px;font-size:24px}.prof .stats{grid-column:1/-1}
 .ft .top{grid-template-columns:1fr 1fr}.art{padding:20px 18px}.art h1,.ph-h h1{font-size:25px}.ticker .cat{display:none}.c-hero .hz .thumb{min-height:130px}}
@media (max-width:480px){.colls,.people,.grid4{grid-template-columns:1fr}.hd .acts .btn.pri{padding:0 12px}}

/* ---------- Bổ sung kiểu claude.vn ---------- */
.lvl{position:absolute;left:10px;top:38px;z-index:1;display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;color:var(--ink);background:#fffffff0;padding:2px 8px;border-radius:999px}
.lvl i{width:6px;height:6px;border-radius:50%;background:#2f6fd6}.lv-basic i{background:#4c9a76}.lv-adv i{background:#c62828}
.ticker .tk-track{flex:1;min-width:0;display:flex}
.tk-item{display:flex;align-items:center;gap:14px;min-width:0}.tk-item[hidden]{display:none}
.tk-nav{display:flex;align-items:center;gap:6px;margin-left:auto;font-size:13px;color:var(--muted);flex:none;padding-right:6px}
.tk-nav button{border:0;background:none;width:26px;height:26px;border-radius:50%;cursor:pointer;color:var(--t2);font-size:17px;line-height:1}
.tk-nav button:hover{background:var(--muted-bg)}
.art .chips span{font-size:11.5px;padding:3px 9px;border-radius:6px;font-weight:500}
.ch-lv{background:#4c9a761f;color:#3f7f61}.ch-lv.lv-mid{background:#2f6fd61a;color:#1f5bbf}.ch-lv.lv-adv{background:#c628281a;color:#b02020}
.ch-type{background:#3b82f61a;color:#2f6fd6}.ch-product{background:#6b5ce71a;color:#5b4ccf}
.ins{margin:0 0 22px;border:.5px solid var(--p-line);border-left:3px solid var(--p);border-radius:10px;background:#f3f7fd;padding:16px 18px}
.ins-h{display:flex;gap:12px;align-items:center;margin-bottom:10px}
.ins-ic{width:34px;height:34px;border-radius:50%;background:var(--p-soft);color:var(--p);display:grid;place-items:center;flex:none}.ins-ic svg{width:18px;height:18px}
.ins-h b{display:block;font-size:15px}.ins-h small{color:var(--muted);font-size:12.5px}
.ins ol{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.ins li{display:flex;gap:10px;font-size:14px;line-height:1.6;color:var(--t2)}
.ins li span{flex:none;width:22px;height:22px;border-radius:50%;background:var(--p-soft);color:var(--p);font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:1px}
.coll .cimg.has-img{background:#eef2f8}.coll .cimg img{width:100%;height:100%;object-fit:cover}
.coll .cimg .bdg{background:var(--p);color:#fff}.coll .cimg.has-img .cnt{color:#fff;text-shadow:0 1px 3px #0006}
.btn.block{display:flex;width:100%}
.cv-event{display:block;padding:0}.cv-event img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cv-event .in{padding:14px 16px}.cv-event small{display:block;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--p);margin-bottom:6px}
.cv-event b{display:block;font-size:15px;line-height:1.35;margin-bottom:6px}.cv-event span{font-size:12.5px;color:var(--muted)}
.cv-pb p{font-size:13.5px;color:var(--t2);margin:10px 0 12px;line-height:1.6}.cv-pb .btn{margin-top:8px}
.cv-courses{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.cv-course{display:flex;flex-direction:column;gap:6px;padding:16px;background:var(--card);border:.5px solid var(--line);border-top:3px solid var(--cc);border-radius:var(--r);box-shadow:var(--sh)}
.cv-course:hover{box-shadow:var(--sh-md)}
.cv-course small{font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--cc)}
.cv-course b{font:700 17px/1.35 var(--serif)}.cv-course span{font-size:13.5px;color:var(--t2);line-height:1.5}.cv-course em{font-style:normal;font-size:12px;color:var(--faint);margin-top:auto}
.cv-tip{display:flex;align-items:center;gap:12px;margin-top:14px;padding:12px 16px;background:var(--card);border:.5px solid var(--line);border-left:3px solid var(--p);border-radius:10px;font-size:13.5px}
.cv-tip small{font-size:10.5px;font-weight:700;text-transform:uppercase;color:var(--p);background:var(--p-soft);padding:2px 8px;border-radius:6px}
.cv-tip span{color:var(--faint);font-size:12.5px}
.cv-emps{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:14px}
.cv-emp{display:flex;flex-direction:column;gap:4px;padding:16px;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.cv-emp:hover{box-shadow:var(--sh-md)}
.cv-emp .ini{width:44px;height:44px;border-radius:10px;display:grid;place-items:center;color:#fff;font-weight:700;font-size:17px;margin-bottom:8px}
.cv-emp b{font-size:14px}.cv-emp small{font-size:12px;color:var(--muted)}.cv-emp em{font-style:normal;font-size:12px;color:var(--cc);margin-top:4px}
.cv-prods{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.cv-prod{display:flex;flex-direction:column;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh)}
.cv-prod:hover{box-shadow:var(--sh-md)}
.cv-prod .img{aspect-ratio:16/9;background:#eef2f8}.cv-prod .img img{width:100%;height:100%;object-fit:cover}
.cv-prod .tx{padding:14px 16px;display:flex;flex-direction:column;gap:5px}
.cv-prod small{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--p)}
.cv-prod b{font-size:15px}.cv-prod span{font-size:13px;color:var(--t2);line-height:1.5}
.cv-prod em{font-style:normal;font-size:11.5px;color:var(--muted)}.cv-prod i{font-style:normal;font-size:12px;color:var(--faint)}
.ft .top:has(.ft5){display:block}
.ft5{display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr .8fr;gap:32px}
.ft5 p{margin:0 0 10px}.ft5 p a{color:var(--ink);font-weight:600}
.ft5 .soc{display:flex;gap:8px}.ft5 .soc a{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--muted-bg);color:var(--t2);margin:0}
.ft5 .soc a:hover{color:var(--p)}.ft5 .soc svg{width:15px;height:15px}
@media (max-width:1100px){.cv-emps{grid-template-columns:repeat(4,minmax(0,1fr))}.cv-courses,.cv-prods{grid-template-columns:1fr 1fr}.ft5{grid-template-columns:1fr 1fr 1fr}}
@media (max-width:760px){.cv-emps{grid-template-columns:1fr 1fr}.ft5{grid-template-columns:1fr 1fr}.tk-nav span{display:none}}
@media (max-width:480px){.cv-courses,.cv-prods{grid-template-columns:1fr}}

/* ================= Học tập: trung tâm học tập, khóa học, lộ trình ================= */
.btn.sm{height:32px;padding:0 14px;font-size:13px}
/* --- Trung tâm học tập --- */
.lc-hero{background:radial-gradient(120% 140% at 50% 0%,#2a55a8 0%,var(--p) 45%,var(--p2) 100%);color:#fff;text-align:center;padding:46px 0 52px;position:relative;overflow:hidden}
.lc-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff0d 1px,transparent 1px),linear-gradient(90deg,#ffffff0d 1px,transparent 1px);background-size:28px 28px;mask:linear-gradient(#000,transparent)}
.lc-hero .wrap{position:relative}
.lc-kick{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:99px;background:#ffffff26;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.lc-kick svg{width:13px;height:13px}
.lc-hero h1{margin:16px 0 10px;font:700 clamp(28px,4vw,40px)/1.15 var(--serif);letter-spacing:-.02em}
.lc-hero p,.lc-desc p{margin:0 auto;max-width:620px;color:#ffffffd9;font-size:15.5px}
.lc-search{display:flex;align-items:center;gap:10px;max-width:520px;margin:24px auto 0;background:#fff;border-radius:99px;padding:0 20px;height:50px;box-shadow:0 10px 30px #0b1a3a40;color:var(--muted)}
.lc-search svg{width:18px;height:18px;flex:none}
.lc-search input{flex:1;border:0;outline:0;font:inherit;font-size:15px;color:var(--ink);background:none;min-width:0}
.lc-map{display:flex;align-items:center;gap:18px;margin:24px 0 26px;padding:18px 22px;border-radius:14px;background:#0f1b33;color:#fff;box-shadow:var(--sh-md);transition:.15s}
.lc-map:hover{transform:translateY(-1px);box-shadow:0 10px 26px #0f1b3333}
.lc-map-ic{flex:none;width:64px}.lc-map-ic svg{width:64px;height:40px}
.lc-map-tx{flex:1;min-width:0;display:grid;gap:3px}
.lc-map-tx i{font-style:normal;justify-self:start;background:var(--p);color:#fff;font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:2px 8px;border-radius:99px}
.lc-map-tx b{font:700 18px/1.35 var(--serif)}.lc-map-tx small{color:#c9d3e8;font-size:13px;line-height:1.5}
.lc-map .btn.pri{background:#3a6fd8;border-color:#3a6fd8}
.lc-body{display:grid;grid-template-columns:230px minmax(0,1fr);gap:26px;align-items:start;margin-bottom:56px}
.lc-side{position:sticky;top:76px;display:grid;gap:6px}
.lc-fmt{display:grid;gap:2px;padding-bottom:14px;border-bottom:.5px solid var(--line3)}
.lc-fmt a,.lc-tracks button{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:9px;font-size:14px;font-weight:500;color:var(--t2);border:0;background:none;cursor:pointer;text-align:left;width:100%}
.lc-fmt a svg{width:17px;height:17px;flex:none}
.lc-fmt a em,.lc-tracks em{margin-left:auto;font-style:normal;font-size:12px;color:var(--faint);font-weight:600}
.lc-fmt a:hover,.lc-tracks button:hover{background:var(--muted-bg);color:var(--ink)}
.lc-fmt a.on{background:var(--p-soft);color:var(--p);font-weight:600}.lc-fmt a.on em{color:var(--p)}
.lc-tr-h{margin:12px 12px 4px;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--faint)}
.lc-tracks{display:grid;gap:1px}
.lc-tracks button i{width:8px;height:8px;border-radius:50%;flex:none}
.lc-tracks button.on{background:var(--muted-bg);color:var(--ink);font-weight:600}
.lc-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.lc-card{display:flex;flex-direction:column;background:var(--card);border:.5px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:.15s}
.lc-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md)}
.lc-card[hidden]{display:none}
.lc-cv{position:relative;aspect-ratio:16/10;display:grid;place-items:center;background:linear-gradient(135deg,var(--a),color-mix(in srgb,var(--a) 50%,#0f1b33))}
.lc-ic{width:52px;height:52px;border-radius:12px;background:#ffffff2e;display:grid;place-items:center;color:#fff;backdrop-filter:blur(4px)}
.lc-ic svg{width:26px;height:26px}
.lc-chn{position:absolute;right:10px;bottom:10px;display:inline-flex;align-items:center;gap:5px;background:#fff;color:var(--ink);font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:99px;box-shadow:var(--sh)}
.lc-chn svg{width:12px;height:12px;color:var(--a,var(--p))}
.lc-cb{display:flex;flex-direction:column;gap:5px;padding:14px 16px 16px;flex:1}
.lc-cb small{font-size:11.5px;font-weight:700}
.lc-cb b{font-size:15.5px;line-height:1.35}
.lc-sub{font-size:13px;color:var(--muted);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lc-meta{margin-top:auto;padding-top:12px;font-size:12.5px;color:var(--t2);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.lc-meta i{width:3px;height:3px;border-radius:50%;background:var(--faint)}
.lc-empty{padding:40px;text-align:center;color:var(--muted);border:1px dashed var(--line3);border-radius:var(--r)}
.lc-empty button{border:0;background:none;color:var(--p);font-weight:600;cursor:pointer}

/* --- Trang khóa học --- */
.cr-trail{background:var(--card);border-bottom:.5px solid var(--line);font-size:13px}
.cr-trail .wrap{display:flex;align-items:center;gap:10px;min-height:46px}
.cr-trail-ic{width:16px;height:16px;color:var(--p);flex:none}
.cr-trail-p{display:flex;align-items:center;gap:7px;min-width:0;overflow:hidden;white-space:nowrap;color:var(--muted)}
.cr-trail-p b{color:var(--p);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase}
.cr-trail-p i{font-style:normal;color:var(--faint)}.cr-trail-p .cur{color:var(--ink);font-weight:600;overflow:hidden;text-overflow:ellipsis}
.cr-trail-p a:hover{color:var(--p)}
.cr-trail-a{margin-left:auto;display:flex;gap:8px;flex:none}
.cr-done-top{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 14px;border-radius:99px;border:1px solid var(--line3);background:var(--card);font-size:12.5px;font-weight:600;color:var(--t2);cursor:pointer}
.cr-done-top svg{width:13px;height:13px}
.cr-done-top.is-done,[data-done].is-done{background:#e7f5ee;border-color:#3f9a6b;color:#23784d}
.cr-hero{background:linear-gradient(120deg,var(--a) 0%,color-mix(in srgb,var(--a) 60%,#0f1b33) 100%);color:#fff;padding:20px 0 26px}
.cr-crumb{display:flex;gap:7px;font-size:13px;color:#ffffffc0;margin-bottom:14px}.cr-crumb i{font-style:normal}.cr-crumb a:hover{color:#fff}
.cr-ht{display:flex;align-items:center;gap:18px}
.cr-ic{width:58px;height:58px;border-radius:12px;background:#fff;color:var(--a);display:grid;place-items:center;flex:none;box-shadow:0 6px 18px #0003}
.cr-ic svg{width:28px;height:28px}
.cr-htx{flex:1;min-width:0}
.cr-htx h1{margin:0 0 8px;font:700 clamp(22px,3vw,30px)/1.2 var(--serif);letter-spacing:-.015em}
.cr-chips{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12.5px}
.cr-chips span{background:#ffffff2e;padding:3px 11px;border-radius:99px;font-weight:600}
.cr-chips em{font-style:normal;display:inline-flex;align-items:center;gap:5px;color:#ffffffd9}.cr-chips svg{width:14px;height:14px}
.cr-save{display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 16px;border-radius:99px;border:1px solid #ffffff80;background:#ffffff14;color:#fff;font-size:13px;font-weight:600;cursor:pointer;flex:none}
.cr-save svg{width:15px;height:15px}.cr-save:hover,.cr-save.on{background:#fff;color:var(--a)}
.cr-save.on svg{fill:currentColor}
.cr-grid{display:grid;grid-template-columns:260px 220px minmax(0,1fr);gap:28px;align-items:start;padding-top:26px;padding-bottom:60px}
.cr-grid:not(:has(.cr-toc)){grid-template-columns:260px minmax(0,1fr)}
.cr-out,.cr-toc{position:sticky;top:76px;max-height:calc(100vh - 92px);overflow:auto;scrollbar-width:thin}
.cr-out-h{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.cr-out-h b{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.cr-fold{border:0;background:none;color:var(--faint);cursor:pointer;font-size:15px;padding:0 4px}
.cr-out.folded>:not(.cr-out-h),.cr-toc.folded>nav{display:none}
.cr-prog{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:12px;color:var(--muted)}
.cr-prog .bar{flex:1;height:5px;border-radius:9px;background:var(--muted-bg);overflow:hidden}.cr-prog .bar i{display:block;height:100%;width:0;background:var(--p);transition:.3s}
.cr-prog b{color:var(--p)}
.cr-ch{border-bottom:.5px solid var(--line)}
.cr-chb{display:flex;align-items:flex-start;gap:6px;width:100%;padding:10px 2px;border:0;background:none;cursor:pointer;text-align:left;font-size:13.5px;font-weight:600;color:var(--ink)}
.cr-chb .chev{width:13px;height:13px;margin-top:3px;flex:none;color:var(--faint);transition:.15s}
.cr-ch.open .chev{transform:rotate(90deg)}
.cr-chb .t{flex:1}.cr-chn{font-size:12px;color:var(--faint);font-weight:500;flex:none}.cr-chn i{font-style:normal}
.cr-ls{display:none;padding:0 0 8px}.cr-ch.open .cr-ls{display:grid;gap:2px}
.cr-l{display:flex;gap:8px;align-items:flex-start;padding:7px 8px 7px 10px;border-radius:8px;font-size:13px;color:var(--t2);line-height:1.45}
.cr-l:hover{background:var(--muted-bg);color:var(--ink)}
.cr-l.on{background:var(--p-soft);color:var(--p);font-weight:600;box-shadow:inset 3px 0 0 var(--p)}
.cr-l .ic{position:relative;width:15px;height:15px;flex:none;margin-top:1px}.cr-l .ic svg{width:15px;height:15px}
.cr-l .ic .ok{display:none;position:absolute;inset:0;background:#3f9a6b;color:#fff;border-radius:50%;padding:2px}
.cr-l.done .ic .ok{display:block}
.cr-l .t b{font-weight:600;margin-right:6px;font-variant-numeric:tabular-nums}
.cr-toc nav{display:grid;border-left:1.5px solid var(--line3)}
.cr-toc a{padding:5px 0 5px 12px;margin-left:-1.5px;border-left:1.5px solid transparent;font-size:13px;line-height:1.45;color:var(--muted)}
.cr-toc a.sub{padding-left:22px;font-size:12.5px}
.cr-toc a:hover{color:var(--ink)}.cr-toc a.on{color:var(--p);border-left-color:var(--p);font-weight:600}
.cr-main{min-width:0;max-width:760px}
.cr-lead{font:500 19px/1.6 var(--serif);color:var(--ink);margin:0 0 22px}
.cr-obj{border:.5px solid var(--p-line);background:var(--p-soft);border-radius:12px;padding:16px 20px;margin:0 0 26px}
.cr-obj>b{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--p)}.cr-obj svg{width:17px;height:17px}
.cr-obj ol{margin:10px 0 0;padding-left:20px;font-size:14.5px;line-height:1.65;color:var(--t2)}.cr-obj li{margin:4px 0}
.cr-donebox{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:34px 0 18px;padding:18px 22px;border:.5px solid var(--line3);border-radius:12px;background:var(--card)}
.cr-donebox b{display:block;font-size:15px}.cr-donebox small{color:var(--muted);font-size:12.5px}
.cr-pn{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cr-pn a{display:grid;gap:4px;padding:14px 18px;border:.5px solid var(--line3);border-radius:12px;background:var(--card);transition:.15s}
.cr-pn a:hover{border-color:var(--p)}
.cr-pn small{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--muted);font-weight:600}.cr-pn small svg{width:14px;height:14px}
.cr-pn b{font-size:14.5px;line-height:1.4}.cr-pn .next{text-align:right}.cr-pn .next small{justify-content:flex-end}
.cr-more{margin-top:34px}.cr-more h3{font:700 18px var(--serif);margin:0 0 12px}
.cr-more-g{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.cr-more-g a{display:flex;gap:12px;align-items:center;padding:12px 14px;border:.5px solid var(--line3);border-radius:12px;background:var(--card)}
.cr-more-g a:hover{border-color:var(--a)}
.cr-more-g i{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--a),color-mix(in srgb,var(--a) 55%,#0f1b33));flex:none}
.cr-more-g b{display:block;font-size:13.5px;line-height:1.35}.cr-more-g small{font-size:12px;color:var(--muted)}

/* --- Khối nội dung bài học --- */
.lx h2{padding-bottom:8px;border-bottom:.5px solid var(--line3)}
.lx ul li::marker{color:var(--p)}
.lx pre.lx-code{background:#0f1b33;color:#dfe7f7;border:0}
.lx pre.lx-code code{color:inherit}
.lx-kv{display:grid;gap:0;margin:1.2em 0;border:.5px solid var(--line3);border-radius:10px;overflow:hidden;font-size:15px}
.lx-kv>div{display:grid;grid-template-columns:minmax(120px,30%) 1fr;border-top:.5px solid var(--line3)}.lx-kv>div:first-child{border-top:0}
.lx-kv dt{padding:10px 14px;background:var(--muted-bg);font-weight:600;color:var(--ink)}.lx-kv dd{margin:0;padding:10px 14px}
.lx-quote{position:relative}.lx-quote p{margin:0;font-style:italic}.lx-quote cite{display:block;margin-top:6px;font-size:13px;font-style:normal;color:var(--muted)}
.lx-table{overflow:auto;margin:1.2em 0}.lx-table th{background:var(--muted-bg);text-align:left}
.lx-note{margin:1.4em 0;padding:14px 18px;border-radius:10px;border:.5px solid;font-size:15px}
.lx-note ul{margin:6px 0 0}.lx-note p{margin:4px 0 0}
.lx-note__t{display:block;font-size:14px}
.lx-note--info{background:#eef4ff;border-color:#c7d8fb}.lx-note--info .lx-note__t{color:#1f5bbf}
.lx-note--tip{background:#f1f0ff;border-color:#d9d4fb}.lx-note--tip .lx-note__t{color:#5b4ccf}
.lx-note--success{background:#eaf6f0;border-color:#c3e3d2}.lx-note--success .lx-note__t{color:#23784d}
.lx-note--warning{background:#fff6e6;border-color:#f3dcab}.lx-note--warning .lx-note__t{color:#a1660a}
.lx-prompt{margin:1.3em 0;border:.5px solid var(--p-line);border-radius:10px;overflow:hidden}
.lx-prompt__h{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:var(--p-soft);font-size:13px;font-weight:600;color:var(--p)}
.lx-copy{border:1px solid var(--p-line);background:var(--card);color:var(--p);font-size:12px;font-weight:600;border-radius:6px;padding:3px 10px;cursor:pointer}
.lx-prompt pre{margin:0;border:0;border-radius:0;background:var(--card);white-space:pre-wrap}
.lx-check{list-style:none;padding:0!important}.lx-check li{display:flex;gap:10px;align-items:flex-start}
.lx-box{width:16px;height:16px;border:1.5px solid var(--line3);border-radius:4px;flex:none;margin-top:5px;background:var(--card)}
pre.lx-tree{background:var(--card)}
.lx-steps{list-style:none;padding:0!important;counter-reset:st;display:grid;gap:10px}
.lx-steps li{counter-increment:st;display:grid;grid-template-columns:30px 1fr;gap:2px 12px;margin:0}
.lx-steps li::before{content:counter(st);grid-row:span 2;width:28px;height:28px;border-radius:50%;background:var(--p);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:700}
.lx-steps li span{color:var(--t2);font-size:15px}
.lx-term{margin:1.3em 0;border-radius:10px;overflow:hidden;background:#0b1428}
.lx-term__bar{display:flex;align-items:center;gap:6px;padding:8px 12px;background:#16213d;color:#9fb0d0;font-size:12px}
.lx-term__bar i{width:10px;height:10px;border-radius:50%;background:#ff5f57}.lx-term__bar i:nth-child(2){background:#febc2e}.lx-term__bar i:nth-child(3){background:#28c840}
.lx-term__bar span{margin-left:8px}
.lx-term pre{margin:0;border:0;border-radius:0;background:none;color:#cfe3ff}
.lx-tool{margin:1.3em 0;border:.5px solid var(--line3);border-radius:10px;padding:12px 14px;background:var(--card);font-size:14px}
.lx-tool__h{margin-bottom:8px}.lx-tool pre{margin:8px 0 0}
.lx-convo{display:grid;gap:10px;margin:1.3em 0}
.lx-msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:15px}.lx-msg b{display:block;font-size:12px;color:var(--muted)}.lx-msg p{margin:2px 0 0}
.lx-msg--u{justify-self:end;background:var(--p);color:#fff;border-bottom-right-radius:4px}.lx-msg--u b{color:#ffffffc0}
.lx-msg--c{background:var(--muted-bg);border-bottom-left-radius:4px}
.lx-ex{margin:1.4em 0;border:1px solid var(--p-line);border-radius:12px;padding:16px 20px;background:var(--card)}
.lx-ex__h{font-weight:700;color:var(--p);margin-bottom:6px}.lx-ex__h small{font-weight:500;color:var(--muted)}
.lx-ex details{margin-top:8px;border-top:.5px dashed var(--line3);padding-top:8px}.lx-ex summary{cursor:pointer;font-weight:600;font-size:14px}

/* --- Trắc nghiệm --- */
.qz{margin:34px 0 0;border:.5px solid var(--line3);border-radius:14px;background:var(--card);overflow:hidden}
.qz-h{display:flex;align-items:center;gap:12px;padding:16px 20px;border-bottom:.5px solid var(--line)}
.qz-ic{width:38px;height:38px;border-radius:10px;background:var(--p-soft);color:var(--p);display:grid;place-items:center;flex:none}.qz-ic svg{width:19px;height:19px}
.qz-h b{display:block;font-size:15.5px}.qz-h small{color:var(--muted);font-size:12.5px}
.qz-score{margin-left:auto;font-weight:700;color:var(--p);font-variant-numeric:tabular-nums}
.qz-list{list-style:none;margin:0;padding:6px 20px 10px;counter-reset:q}
.qz-q{counter-increment:q;padding:16px 0;border-bottom:.5px solid var(--line)}.qz-q:last-child{border-bottom:0}
.qz-q>p{margin:0 0 10px;font-weight:600;font-size:15px;line-height:1.55}.qz-q>p::before{content:"Câu " counter(q) ". ";color:var(--p)}
.qz-opts{display:grid;gap:7px}
.qz-opts button{display:flex;gap:10px;align-items:flex-start;text-align:left;padding:10px 12px;border:1px solid var(--line3);border-radius:9px;background:var(--card);cursor:pointer;font-size:14.5px;line-height:1.5;color:var(--ink)}
.qz-opts button span{width:22px;height:22px;border-radius:50%;background:var(--muted-bg);display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}
.qz-opts button:hover{border-color:var(--p)}
.qz-q.ans .qz-opts button{cursor:default}.qz-q.ans .qz-opts button:hover{border-color:var(--line3)}
.qz-opts button.right{border-color:#3f9a6b!important;background:#eaf6f0}.qz-opts button.right span{background:#3f9a6b;color:#fff}
.qz-opts button.wrong{border-color:#c62828!important;background:#fdeeee}.qz-opts button.wrong span{background:#c62828;color:#fff}
.qz-ex{margin-top:10px;padding:10px 12px;border-radius:8px;background:var(--muted-bg);font-size:14px;line-height:1.6;color:var(--t2)}
.qz-q.ok .qz-ex b{color:#23784d}.qz-q.bad .qz-ex b{color:#b02020}
.qz-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 20px;background:var(--p-soft)}

/* --- Bản đồ lộ trình --- */
.rm-bar{position:sticky;top:60px;z-index:20;background:#ffffffeb;backdrop-filter:blur(10px);border-bottom:.5px solid var(--line)}
.rm-bar .wrap{display:flex;align-items:center;justify-content:space-between;height:44px;font-size:13px}
.rm-back{display:inline-flex;align-items:center;gap:6px;color:var(--t2);font-weight:500}.rm-back svg{width:15px;height:15px}.rm-back:hover{color:var(--p)}
.rm-prog{display:flex;align-items:center;gap:10px;color:var(--muted)}.rm-prog .bar{width:160px;height:5px;border-radius:9px;background:var(--muted-bg);overflow:hidden}
.rm-prog .bar i,.rm-hbar i{display:block;height:100%;width:0;background:var(--p);transition:.3s}
.rm-head{text-align:center;padding-top:34px;padding-bottom:18px;max-width:820px}
.rm-kick{display:inline-flex;align-items:center;gap:6px;color:var(--p);font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.rm-kick svg{width:13px;height:13px}
.rm-head h1{margin:12px 0 10px;font:700 clamp(28px,4.2vw,40px)/1.15 var(--serif);letter-spacing:-.02em}
.rm-head>p{margin:0 auto;color:var(--t2);font-size:15px;line-height:1.65}
.rm-stats{display:flex;justify-content:center;align-items:center;gap:12px;flex-wrap:wrap;margin:16px 0 14px;font-size:13.5px;color:var(--muted)}
.rm-stats b{color:var(--ink)}.rm-stats i{width:3px;height:3px;border-radius:50%;background:var(--faint)}
.rm-hbar{width:min(280px,80%);height:5px;margin:0 auto;border-radius:9px;background:var(--muted-bg);overflow:hidden}
.rm-hint{font-size:12.5px!important;color:var(--muted)!important;margin:14px 0 12px!important}
.rm-legend{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;font-size:12.5px;color:var(--t2)}
.rm-legend span{display:inline-flex;align-items:center;gap:6px}.rm-legend i{width:14px;height:14px;border-radius:4px}
.lg-main{background:var(--p)}.lg-sub{border:1.5px solid var(--line3);background:var(--card)}.lg-opt{border:1.5px dashed var(--faint);background:var(--card)}.lg-here{border:2px solid var(--p);background:var(--p-soft)}
.rm-chips{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:16px}
.rm-chips a{display:inline-flex;align-items:center;gap:7px;padding:6px 13px 6px 6px;border:.5px solid var(--line3);border-radius:99px;background:var(--card);font-size:13px;font-weight:600;box-shadow:var(--sh)}
.rm-chips a i{font-style:normal;font-size:11px;font-weight:700;color:var(--c);background:color-mix(in srgb,var(--c) 14%,#fff);border-radius:99px;padding:2px 7px}
.rm-chips a:hover{border-color:var(--c)}
.rm{position:relative;max-width:1080px;margin:0 auto;padding:10px var(--gut) 60px;background-image:radial-gradient(var(--line3) 1px,transparent 1px);background-size:22px 22px}
.rm-stage{position:relative;padding-top:34px;scroll-margin-top:110px}
.rm-pill{position:relative;z-index:2;display:flex;align-items:center;gap:10px;width:max-content;margin:0 auto;padding:7px 10px 7px 8px;border-radius:99px;background:var(--c);color:#fff;box-shadow:0 6px 18px color-mix(in srgb,var(--c) 35%,transparent)}
.rm-pill i{font-style:normal;font-size:12px;font-weight:700;background:#ffffff33;border-radius:99px;padding:3px 8px}
.rm-pill b{font:700 19px/1 var(--serif)}
.rm-cnt{font-size:12px;font-weight:700;background:#ffffff33;border-radius:99px;padding:3px 9px}
.rm-goal{position:relative;z-index:2;text-align:center;margin:10px auto 0;max-width:460px;font-size:13.5px;color:var(--t2);background:var(--page);padding:2px 8px}
.rm-row{position:relative;display:grid;grid-template-columns:1fr 210px 1fr;gap:0;align-items:center;padding:22px 0}
.rm-stage::before{content:"";position:absolute;left:50%;top:60px;bottom:0;width:2px;margin-left:-1px;background:color-mix(in srgb,var(--c) 55%,transparent)}
.rm-topic{position:relative;z-index:2;display:flex;gap:10px;align-items:flex-start;text-align:left;width:210px;padding:14px 14px;border-radius:10px;border:0;background:var(--c);color:#fff;cursor:pointer;box-shadow:0 6px 16px color-mix(in srgb,var(--c) 30%,transparent);transition:.15s}
.rm-topic:hover{transform:translateY(-2px)}
.rm-topic b{display:block;font:700 15.5px/1.3 var(--serif)}.rm-topic small{display:block;margin-top:4px;font-size:11.5px;color:#ffffffcc}
.rm-topic.opt{background:color-mix(in srgb,var(--c) 78%,#fff);outline:2px dashed #ffffffb3;outline-offset:-5px}
.rm-topic .here{display:none;position:absolute;top:-11px;left:12px;background:#0f1b33;color:#fff;font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:3px 8px;border-radius:5px}
.rm-topic.is-here{box-shadow:0 0 0 4px color-mix(in srgb,var(--c) 30%,transparent),0 6px 16px color-mix(in srgb,var(--c) 30%,transparent)}.rm-topic.is-here .here{display:block}
.ck{width:18px;height:18px;border-radius:50%;border:2px solid currentColor;opacity:.75;flex:none;margin-top:1px;display:grid;place-items:center}
.done>.ck{opacity:1;background:#3f9a6b;border-color:#3f9a6b}.done>.ck::after{content:"";width:8px;height:4px;border:2px solid #fff;border-top:0;border-right:0;transform:rotate(-45deg) translate(1px,-1px)}
.rm-topic.done>.ck{background:#fff;border-color:#fff}.rm-topic.done>.ck::after{border-color:var(--c)}
.rm-side{position:relative;display:grid;gap:8px;align-content:center}
.rm-side.l{padding-right:34px;justify-items:end}.rm-side.r{padding-left:34px;justify-items:start}
.rm-side:empty{visibility:hidden}
/* nét đứt nối nhánh */
.rm-side.l::after,.rm-side.r::after{content:"";position:absolute;top:22px;bottom:22px;border:0 dashed color-mix(in srgb,var(--c) 70%,transparent)}
.rm-side.l::after{right:18px;border-right-width:1.5px}.rm-side.r::after{left:18px;border-left-width:1.5px}
.rm-side.l::before,.rm-side.r::before{content:"";position:absolute;top:50%;width:18px;border-top:1.5px dashed color-mix(in srgb,var(--c) 70%,transparent)}
.rm-side.l::before{right:0}.rm-side.r::before{left:0}
.rm-side:empty::before,.rm-side:empty::after{display:none}
.rm-sub{position:relative;display:flex;align-items:center;gap:9px;width:min(100%,250px);padding:9px 12px;border-radius:9px;border:1.5px solid color-mix(in srgb,var(--c) 30%,var(--line3));background:var(--card);cursor:pointer;font-size:13px;font-weight:500;color:var(--ink);text-align:left;box-shadow:var(--sh);transition:.15s}
.rm-sub:hover{border-color:var(--c);transform:translateY(-1px)}
.rm-sub .ck{width:16px;height:16px;color:var(--faint)}
.rm-sub .t{flex:1;line-height:1.35}
.rm-sub .n{font-size:11px;font-weight:700;color:var(--c);background:color-mix(in srgb,var(--c) 12%,#fff);border-radius:99px;padding:1px 7px}
.rm-sub.opt{border-style:dashed}
.rm-side.l .rm-sub::after,.rm-side.r .rm-sub::after{content:"";position:absolute;top:50%;width:16px;border-top:1.5px dashed color-mix(in srgb,var(--c) 70%,transparent)}
.rm-side.l .rm-sub::after{right:-18px}.rm-side.r .rm-sub::after{left:-18px}
.rm-end{position:relative;z-index:2;display:grid;justify-items:center;gap:4px;text-align:center;margin:40px auto 0;max-width:420px;padding:20px;border-radius:14px;background:var(--card);border:.5px solid var(--line3);box-shadow:var(--sh)}
.rm-end span{font-size:26px}.rm-end small{color:var(--muted)}.rm-end a{color:var(--p);font-weight:600}
.rm-ov{position:fixed;inset:0;z-index:60;background:#0b1a3a55;backdrop-filter:blur(2px)}
.rm-dr{position:fixed;z-index:61;top:0;right:0;bottom:0;width:min(420px,100%);background:var(--card);box-shadow:-20px 0 50px #0b1a3a33;padding:26px 24px;overflow:auto;border-top:4px solid var(--c);animation:drIn .18s ease-out}
@keyframes drIn{from{transform:translateX(30px);opacity:0}}
.rm-x{position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:50%;border:0;background:var(--muted-bg);font-size:20px;cursor:pointer;color:var(--t2)}
.rm-dr-st{font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--c)}
.rm-dr h3{margin:8px 40px 4px 0;font:700 24px/1.25 var(--serif)}
.rm-dr-meta{margin:0 0 12px;font-size:12.5px;color:var(--muted)}
.rm-dr p{color:var(--t2);line-height:1.65}
.rm-dr-l{display:grid;gap:8px;margin:18px 0 22px}.rm-dr-l>b{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.rm-dr-l a{display:grid;gap:2px;padding:11px 14px;border:.5px solid var(--line3);border-radius:10px}
.rm-dr-l a:hover{border-color:var(--c)}
.rm-dr-l i{font-style:normal;font-size:11px;font-weight:700;color:var(--c)}.rm-dr-l span{font-weight:600;font-size:14px}.rm-dr-l small{font-size:12px;color:var(--muted)}
.rm-dr-l .none{font-size:13.5px;color:var(--muted)}
#drDone.is-done{background:#3f9a6b;border-color:#3f9a6b}

@media (max-width:1180px){.cr-grid,.cr-grid:not(:has(.cr-toc)){grid-template-columns:240px minmax(0,1fr)}.cr-toc{display:none}}
@media (max-width:1100px){.lc-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:860px){
  .lc-body{grid-template-columns:1fr}.lc-side{position:static}.lc-tracks{display:flex;flex-wrap:wrap;gap:6px}.lc-tracks button{width:auto;border:.5px solid var(--line3);border-radius:99px;padding:6px 12px}
  .lc-fmt{display:flex;flex-wrap:wrap;gap:6px}.lc-fmt a{width:auto}
  .cr-grid,.cr-grid:not(:has(.cr-toc)){grid-template-columns:1fr}.cr-out{position:static;max-height:none;border:.5px solid var(--line3);border-radius:12px;padding:12px 14px;background:var(--card)}
  .cr-trail-a .btn{display:none}.cr-more-g{grid-template-columns:1fr}
  .rm-row{grid-template-columns:1fr;gap:10px;padding:16px 0}.rm-topic{width:100%;order:-1}
  .rm-side.l,.rm-side.r{padding:0 0 0 22px;justify-items:stretch}.rm-side.l::after,.rm-side.r::after,.rm-side.l::before,.rm-side.r::before{display:none}
  .rm-side.l .rm-sub::after,.rm-side.r .rm-sub::after{left:-14px;right:auto;width:12px}.rm-sub{width:100%}
  .rm-stage::before{left:10px}
}
@media (max-width:640px){.cr-trail-p>:not(:first-child){display:none}.lc-grid{grid-template-columns:1fr}.lc-map{flex-wrap:wrap}.lc-map-ic{display:none}.cr-ht{flex-wrap:wrap}.cr-save{order:3}.cr-pn{grid-template-columns:1fr}.cr-pn .next{text-align:left}.cr-pn .next small{justify-content:flex-start}.rm-prog .bar{width:90px}}