/* 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) saturate(180%);border-bottom:.5px solid var(--line)}
.hd .wrap{position:relative;height:100%;display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:10px;flex:none;text-decoration:none}
/* Biểu tượng (ảnh) + tên & slogan dạng chữ — font Be Vietnam Pro (dựng cho tiếng Việt) */
.logo .logo-mark{width:40px;height:40px;object-fit:contain}
.logo-t{display:flex;flex-direction:column;gap:3px;line-height:1}
.logo-t b{display:flex;align-items:baseline;font:700 23px/1 "Be Vietnam Pro",var(--sans);letter-spacing:-.025em;color:var(--ink)}
.logo-t b span{color:#3953c4}
.logo-t small{font:500 10.5px/1 "Be Vietnam Pro",var(--sans);letter-spacing:.01em;color:var(--muted)}
.logo i{font:600 13px/1 "Be Vietnam Pro",var(--sans);font-style:normal;color:var(--p);border:1.5px solid var(--p);border-radius:4px;padding:2px 4px;margin-left:5px;align-self:center}
@media (max-width:760px){.logo .logo-mark{width:34px;height:34px}.logo-t b{font-size:21px}.logo-t small{display:none}}
@media (max-width:380px){.logo{gap:8px}.logo .logo-mark{width:30px;height:30px}.logo-t b{font-size:19px}}
.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);border:0;background:none;cursor:pointer}
.icon-btn:hover{background:var(--muted-bg)}
.icon-btn svg{width:19px;height:19px}
/* Menu lớn */
.mn{position:static;display:flex;align-items:stretch;height:100%;min-width:0}
.mn-i{position:relative;display:flex}
.mn-a{display:flex;align-items:center;height:60px;padding:0 11px;margin-bottom:-1px;font-size:14px;color:var(--t2);white-space:nowrap;border-bottom:2px solid transparent;transition:color .15s,border-color .15s}
.mn-i:hover>.mn-a,.mn-i.is-open>.mn-a{color:var(--p);border-bottom-color:var(--p)}
.mn-p{position:absolute;top:100%;left:0;z-index:40;background:var(--card);border:.5px solid var(--line3);border-top:0;border-radius:0 0 16px 16px;box-shadow:0 18px 40px #0f1b331f,0 2px 6px #0f1b330d;padding:22px 24px 18px;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);transition:opacity .14s,transform .14s,visibility 0s linear .14s}
.mn-i.is-open>.mn-p,.mn-i:focus-within>.mn-p{opacity:1;visibility:visible;pointer-events:auto;transform:none;transition:opacity .22s cubic-bezier(.2,.8,.2,1),transform .22s cubic-bezier(.2,.8,.2,1),visibility 0s}
.mn-p--found{width:600px}.mn-p--use{width:740px}.mn-p--learn{width:720px}.mn-p--explore{width:620px}.mn-p--comm{width:560px}
.mn-h{margin:0 0 10px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--faint)}
.mn-all{display:inline-block;margin-top:10px;font-size:13px;font-weight:600;color:var(--p)}
.mn-all:hover{text-decoration:underline;text-underline-offset:3px}
/* Nền tảng */
.mn-found{display:grid;grid-template-columns:170px 1fr 170px;gap:22px}
.mn-topic{display:flex;align-items:center;gap:10px;padding:6px 0;font-size:13.5px;color:var(--ink)}
.mn-topic i{width:22px;height:22px;border-radius:6px;background:var(--muted-bg);display:grid;place-items:center;color:var(--muted)}
.mn-topic i svg{width:11px;height:11px}
.mn-topic:hover{color:var(--p)}.mn-topic:hover i{background:var(--p-soft);color:var(--p)}
.mn-post{display:flex;gap:10px;align-items:center;padding:6px 0;font-size:13px;line-height:1.4;color:var(--ink)}
.mn-post .th{width:52px;height:38px;border-radius:6px;overflow:hidden;flex:none;background:var(--muted-bg)}
.mn-post .th img,.mn-post .th .ph{width:100%;height:100%;object-fit:cover;font-size:9px!important}
.mn-post>span:last-child{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mn-post:hover{color:var(--p)}
.mn-feat{display:flex;flex-direction:column;border:.5px solid var(--line3);border-radius:12px;overflow:hidden;background:var(--card);box-shadow:var(--sh);transition:.15s;align-self:start}
.mn-feat:hover{box-shadow:var(--sh-md);transform:translateY(-1px)}
.mn-feat .im{position:relative;aspect-ratio:16/10;background:var(--muted-bg);overflow:hidden;display:block}
.mn-feat .im img,.mn-feat .im .ph{width:100%;height:100%;object-fit:cover}
.mn-feat em{position:absolute;top:8px;left:8px;font-style:normal;font-size:10.5px;font-weight:700;color:#fff;background:var(--p);padding:2px 8px;border-radius:99px}
.mn-feat .bd{display:grid;gap:4px;padding:10px 12px 12px}
.mn-feat b{font-size:13px;line-height:1.4}.mn-feat small{font-size:11.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mn-foot{display:flex;align-items:center;gap:10px;margin-top:16px;padding-top:14px;border-top:.5px solid var(--line3);font-size:13px}
.mn-foot-ic{width:28px;height:28px;border-radius:7px;background:var(--p-soft);color:var(--p);display:grid;place-items:center;flex:none}.mn-foot-ic svg{width:15px;height:15px}
.mn-foot-tx{flex:1;min-width:0;color:var(--t2)}.mn-foot-tx b{color:var(--ink)}.mn-foot-tx:hover{color:var(--p)}
.mn-foot-cta{font-weight:600;color:var(--p);white-space:nowrap}
/* Dùng Claude */
.mn-use{display:grid;grid-template-columns:repeat(3,1fr);gap:20px 24px}
.mn-cat{display:grid;align-content:start;gap:2px}
.mn-cat-h{display:flex;align-items:center;gap:9px;margin-bottom:6px;font-size:13.5px;font-weight:700;color:var(--c)}
.mn-cat-h .ic,.mn-item .ic{width:28px;height:28px;border-radius:7px;display:grid;place-items:center;flex:none;background:color-mix(in srgb,var(--c) 13%,#fff);color:var(--c)}
.mn-cat-h svg,.mn-item .ic svg{width:15px;height:15px}
.mn-link{padding:5px 0;font-size:13.5px;color:var(--ink)}.mn-link:hover{color:var(--c)}
.mn-pop .mn-post{padding:4px 0}.mn-post.sm .th{width:46px;height:34px}
/* Học tập, Khám phá, Cộng đồng */
.mn-two{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.mn-two.has-feat{grid-template-columns:1fr 210px}
.mn-grid2{display:grid;grid-template-columns:1fr 1fr;gap:2px 18px}
.mn-item{display:flex;align-items:flex-start;gap:11px;padding:8px;margin:0 -8px;border-radius:10px;transition:background .15s}
a.mn-item:hover{background:var(--muted-bg)}
.mn-item .ic{width:32px;height:32px;border-radius:8px}
.mn-item .bd{display:grid;gap:1px;min-width:0}
.mn-item b{font-size:13.5px;font-weight:600;color:var(--ink);line-height:1.35}
.mn-item b em{font-style:normal;font-size:11px;font-weight:700;color:var(--c);background:color-mix(in srgb,var(--c) 12%,#fff);border-radius:99px;padding:1px 7px;margin-left:4px;vertical-align:1px}
.mn-item small{font-size:12px;color:var(--muted);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* Ask AI */



@media (max-width:1180px){.mn-a{padding:0 8px}}
@media (max-width:1100px){
  .mn{display:none}.menu-btn{display:grid}
  .hd.open .mn{display:flex;flex-direction:column;align-items:stretch;height:auto;position:absolute;top:60px;left:0;right:0;max-height:calc(100vh - 60px);overflow:auto;padding:8px var(--gut) 18px;background:var(--card);border-bottom:.5px solid var(--line);box-shadow:var(--sh-md)}
  .mn-i{flex-direction:column}.mn-a{height:46px;border-bottom:.5px solid var(--line);font-weight:600;color:var(--ink);justify-content:space-between}
  .mn-a::after{content:"";width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);opacity:.5;transition:.15s}
  .mn-i.is-open>.mn-a::after{transform:rotate(-135deg)}
  .mn-i:hover>.mn-a{border-bottom-color:var(--line)}
  .mn-p{position:static;display:none;width:auto!important;opacity:1;visibility:visible;pointer-events:auto;transform:none;border:0;box-shadow:none;padding:12px 0 6px;border-radius:0}
  .mn-i.is-open>.mn-p{display:block}
  .mn-found,.mn-use,.mn-two,.mn-two.has-feat,.mn-grid2{grid-template-columns:1fr;gap:14px}
  .mn-feat,.mn-pop{display:none}
}
@media (max-width:480px){.hd .acts .btn.pri{padding:0 12px}}

.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 ---------- */
.cols>main{min-width:0}
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;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{white-space:nowrap;flex:none;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 240px 1fr;align-items:center;padding:24px 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)}
/* Ô chủ đề chính */
.rm-topic{position:relative;z-index:2;display:flex;gap:10px;align-items:flex-start;text-align:left;width:240px;padding:14px 16px;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:transform .15s,box-shadow .15s}
.rm-topic::before{content:"";position:absolute;left:50%;top:-9px;margin-left:-5px;border:5px solid transparent;border-top:6px solid color-mix(in srgb,var(--c) 75%,#000)}
.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.is-done{background:color-mix(in srgb,var(--c) 80%,#0f1b33)}
.rm-topic.is-skip{opacity:.6}
.rm-topic.is-here,.rm-topic.is-open{box-shadow:0 0 0 4px color-mix(in srgb,var(--c) 28%,transparent),0 6px 16px color-mix(in srgb,var(--c) 30%,transparent)}
.here{display:none;position:absolute;top:-11px;left:12px;z-index:3;background:#0f1b33;color:#fff;font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:3px 8px;border-radius:5px;white-space:nowrap}
.is-here>.here{display:block}
/* Vòng tròn trạng thái */
.st{width:18px;height:18px;border-radius:50%;border:2px solid var(--line3);background:var(--card);flex:none;margin-top:1px;display:grid;place-items:center}
.rm-topic .st{border-color:#ffffffb3;background:transparent}
.st.is-done{color:#fff}.rm-topic .st.is-done{background:#fff!important;border-color:#fff!important;color:var(--c)}
.st.is-doing i{width:8px;height:8px;border-radius:50%}
.rm-topic .st.is-doing{border-color:#fff!important}.rm-topic .st.is-doing i{background:#fff!important}
.st.is-skip{background:var(--muted-bg);border-color:var(--line3);color:var(--muted)}
.rm-topic .st.is-skip{background:#ffffff40;border-color:#ffffff80;color:#fff}
/* Nhánh trái / phải */
.rm-side{position:relative;display:grid;gap:10px;align-content:center}
.rm-side.l{padding-right:36px;justify-items:end}.rm-side.r{padding-left:36px;justify-items:start}
.rm-side:empty{visibility:hidden}
.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:20px;border-right-width:1.5px}.rm-side.r::after{left:20px;border-left-width:1.5px}
.rm-side.l::before,.rm-side.r::before{content:"";position:absolute;top:50%;width:20px;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:10px;width:min(100%,290px);padding:10px 12px;border-radius:9px;border:1.5px solid color-mix(in srgb,var(--c) 28%,var(--line3));background:var(--card);cursor:pointer;font-size:13.5px;font-weight:500;color:var(--ink);text-align:left;box-shadow:var(--sh);transition:transform .15s,border-color .15s}
.rm-sub:hover,.rm-sub.is-open{border-color:var(--c)}.rm-sub:hover{transform:translateY(-1px)}
.rm-sub .st{margin-top:0}
.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;background:color-mix(in srgb,var(--card) 70%,transparent)}
.rm-sub.is-done{border-color:color-mix(in srgb,var(--c) 55%,transparent)}
.rm-sub.is-skip .t{color:var(--faint);text-decoration:line-through}
.rm-sub.is-here{border-color:var(--c);box-shadow:0 0 0 3px color-mix(in srgb,var(--c) 18%,transparent)}
/* nét đứt + mũi tên vào từng ô con */
.rm-side.l .rm-sub::after,.rm-side.r .rm-sub::after{content:"";position:absolute;top:50%;width:18px;border-top:1.5px dashed color-mix(in srgb,var(--c) 70%,transparent)}
.rm-side.l .rm-sub::after{right:-20px}.rm-side.r .rm-sub::after{left:-20px}
.rm-side.l .rm-sub::before,.rm-side.r .rm-sub::before{content:"";position:absolute;top:50%;margin-top:-4px;border:4px solid transparent}
.rm-side.l .rm-sub::before{right:-7px;border-right:5px solid color-mix(in srgb,var(--c) 80%,transparent)}
.rm-side.r .rm-sub::before{left:-7px;border-left:5px solid color-mix(in srgb,var(--c) 80%,transparent)}
/* Về đích */
.rm-end{position:relative;z-index:2;display:grid;justify-items:center;gap:6px;text-align:center;margin:44px auto 0;max-width:520px;padding:26px 24px;border-radius:16px;background:var(--card);border:.5px solid var(--line3);box-shadow:var(--sh-md)}
.rm-end-flag{width:44px;height:44px;border-radius:50%;background:var(--p-soft);color:var(--p);display:grid;place-items:center}.rm-end-flag svg{width:22px;height:22px}
.rm-end h2{margin:4px 0 0;font:700 22px var(--serif)}.rm-end p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
.rm-end-a{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:10px}
/* Bảng chi tiết */
.rm-ov{position:fixed;inset:0;z-index:60;background:#0f1b3340}
.rm-dr{position:fixed;z-index:61;top:0;right:0;bottom:0;width:min(440px,100%);background:var(--card);box-shadow:-18px 0 44px #0f1b3326;padding:20px 24px 32px;overflow:auto;border-top:4px solid var(--sc);animation:drIn .18s ease-out}
@keyframes drIn{from{transform:translateX(30px);opacity:0}}
.rm-dr-h{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.rm-dr-st{margin:8px 0 0;display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:11.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--sc)}
.rm-dr-st span{color:var(--faint)}
.rm-dr-st button{border:0;background:none;padding:0;font:inherit;letter-spacing:inherit;text-transform:inherit;color:var(--sc);cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.rm-x{width:34px;height:34px;border-radius:50%;border:0;background:var(--muted-bg);cursor:pointer;color:var(--t2);display:grid;place-items:center;flex:none}
.rm-x:hover{background:var(--line3)}
.rm-dr h2{margin:14px 0 6px;font:700 24px/1.25 var(--serif);letter-spacing:-.01em}
.rm-dr-meta{margin:0 0 10px;font-size:13px;color:var(--muted)}
.rm-dr-desc{margin:0 0 16px;color:var(--t2);font-size:14.5px;line-height:1.65}
.rm-dr-l{margin:22px 0 10px;font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.rm-dr-goals{margin:0 0 16px;padding:14px 16px;border-radius:12px;background:color-mix(in srgb,var(--sc) 7%,#fff);border:.5px solid color-mix(in srgb,var(--sc) 22%,transparent)}
.rm-dr-goals .rm-dr-l{margin:0 0 8px}
.rm-dr-goals ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}
.rm-dr-goals li{display:flex;gap:9px;align-items:flex-start;font-size:13.5px;line-height:1.5;color:var(--ink)}
.rm-dr-goals li span{width:18px;height:18px;border-radius:50%;background:var(--sc);color:#fff;display:grid;place-items:center;flex:none;margin-top:1px}
.rm-dr-states{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.rm-state{height:38px;border-radius:9px;border:1px solid var(--line3);background:var(--card);font-size:13.5px;font-weight:600;color:var(--ink);cursor:pointer}
.rm-state:hover{border-color:var(--sc)}
.rm-state--doing.on{border-color:var(--sc);color:var(--sc);background:color-mix(in srgb,var(--sc) 8%,#fff)}
.rm-state--done.on{border-color:#3f9a6b;background:#3f9a6b;color:#fff}
.rm-state--skip.on{background:var(--muted-bg);color:var(--muted)}
.rm-res{display:grid;gap:8px}
.rm-res a{display:flex;align-items:center;gap:12px;padding:12px 14px;border:.5px solid var(--line3);border-radius:11px;background:var(--card);box-shadow:var(--sh);transition:.15s}
.rm-res a:hover{border-color:var(--sc)}
.rm-res .ic{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex:none;background:var(--p-soft);color:var(--p)}
.rm-res .ic--series{background:#f1f0ff;color:#5b4ccf}.rm-res .ic--article,.rm-res .ic--guide{background:#eaf6f0;color:#23784d}
.rm-res .bd{flex:1;min-width:0;display:grid;gap:2px}
.rm-res small{font-size:10.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.rm-res b{font-size:14px;font-weight:600;line-height:1.4}
.ar{color:var(--faint);flex:none;display:grid}
.rm-asks{display:grid;gap:8px}
.rm-asks a{display:flex;align-items:center;gap:10px;padding:9px 14px;border:1px dashed color-mix(in srgb,var(--sc) 55%,transparent);border-radius:99px;font-size:13.5px;font-weight:500;color:var(--ink)}
.rm-asks a:hover{background:color-mix(in srgb,var(--sc) 6%,#fff)}
.rm-asks .ic{color:var(--sc);display:grid}.rm-asks .q{flex:1}
.rm-subs{display:grid;gap:7px}
.rm-subs button{display:flex;align-items:center;gap:10px;padding:10px 14px;border:.5px solid var(--line3);border-radius:10px;background:var(--card);cursor:pointer;font-size:13.5px;font-weight:500;color:var(--ink);text-align:left}
.rm-subs button:hover{border-color:var(--sc)}.rm-subs .t{flex:1}.rm-subs .st{margin:0}

@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:18px 0}.rm-topic{width:100%;order:-1}.rm-topic::before{display:none}
  .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-side.l .rm-sub::before,.rm-side.r .rm-sub::before{display:none}.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}}

/* ===== Thanh công cụ bên phải header (theo claude.vn): Ask AI viền gradient xoay, tìm kiếm, tuỳ chỉnh, bài mới, đăng nhập ===== */
@property --ask-ai-angle{syntax:"<angle>";inherits:false;initial-value:0deg}
@keyframes ask-ai-spin{to{--ask-ai-angle:360deg}}
.hd .acts{gap:4px}
.ask-ai{position:relative;display:inline-flex;align-items:center;flex-shrink:0;border-radius:99px;padding:1px;margin:0 6px;cursor:pointer;text-decoration:none}
.ask-ai__bd{position:absolute;inset:0;border-radius:inherit;padding:1px;background:conic-gradient(from var(--ask-ai-angle,0deg),#f472b6,#818cf8,#38bdf8,#34d399,#fbbf24,#fb923c,#f472b6);animation:ask-ai-spin 3s linear infinite;-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask:linear-gradient(#fff 0 0) content-box exclude,linear-gradient(#fff 0 0)}
.ask-ai__ct{position:relative;display:inline-flex;align-items:center;gap:5px;padding:5px 14px;border-radius:inherit;background:var(--card);color:var(--t2);font-size:12.5px;font-weight:600;white-space:nowrap;transition:color .15s}
.ask-ai__ct svg{width:15px;height:15px}
.ask-ai:hover .ask-ai__ct{color:var(--ink)}.ask-ai:hover .ask-ai__bd{animation-duration:1.5s}
.ask-ai:active,.login-btn:active{transform:translateY(1px) scale(.99)}
@media (prefers-reduced-motion:reduce){.ask-ai__bd{animation:none}}
.hd-ic{position:relative;height:60px;padding:0 8px;display:flex;align-items:center;border:0;background:none;color:var(--t2);cursor:pointer}
.hd-ic:hover,.hd-ic[aria-expanded="true"]{color:var(--p)}.hd-ic svg{width:18px;height:18px}
.hd-dot{position:absolute;top:18px;right:6px;width:8px;height:8px;border-radius:50%;background:#e5484d;border:2px solid var(--card)}
.login-btn{display:inline-flex;align-items:center;height:34px;padding:0 16px;margin-left:6px;border-radius:99px;background:var(--p);color:#fff;font-size:13.5px;font-weight:600;white-space:nowrap;transition:background .15s,transform .15s}
.login-btn:hover{background:var(--p2);color:#fff}
.hd-pw{position:relative}
.hd-pop{position:absolute;right:-8px;top:calc(100% - 6px);width:320px;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 18px 50px #0f1b3324;padding:8px;z-index:40}
.hd-pop-h{font-size:12px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);padding:8px 10px 6px}
.hd-opt{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px;border-radius:10px;font-size:14px;color:var(--ink)}
.hd-opt small{display:block;color:var(--muted);font-size:12px;margin-top:1px}
.hd-seg{display:inline-flex;background:var(--muted-bg);border-radius:9px;padding:3px;gap:2px}
.hd-seg button{border:0;background:none;padding:5px 10px;border-radius:7px;font:600 13px/1 inherit;color:var(--t2);cursor:pointer}.hd-seg button.on{background:var(--card);color:var(--ink);box-shadow:0 1px 3px #0f1b331f}
.hd-sw{cursor:pointer}.hd-sw input{position:absolute;opacity:0;pointer-events:none}
.hd-sw i{flex:none;width:38px;height:22px;border-radius:99px;background:#cfd6e3;position:relative;transition:background .2s}
.hd-sw i:after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 1px 3px #0003;transition:transform .2s}
.hd-sw input:checked+i{background:var(--p)}.hd-sw input:checked+i:after{transform:translateX(16px)}
.hd-n{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:10px;color:var(--ink);text-decoration:none}
.hd-n:hover{background:var(--muted-bg)}
.hd-n .th{flex:none;width:52px;height:38px;border-radius:7px;overflow:hidden;background:var(--muted-bg)}.hd-n .th img{width:100%;height:100%;object-fit:cover}
.hd-n b{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:13.5px;font-weight:600;line-height:1.4}
.hd-n small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.hd-noti{max-height:70vh;overflow:auto}
.hd-empty{margin:0;padding:14px 10px;color:var(--muted);font-size:13.5px}
.hd-srch{position:fixed;inset:0;z-index:60;background:#0f1b3352;backdrop-filter:blur(2px);display:flex;justify-content:center;align-items:flex-start;padding:12vh 16px 16px}
.hd-srch[hidden]{display:none}
.hd-srch-box{width:100%;max-width:620px;background:var(--card);border-radius:16px;box-shadow:0 24px 70px #0f1b3340;overflow:hidden}
.hd-srch-in{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.hd-srch-in svg{width:20px;height:20px;color:var(--muted);flex:none}
.hd-srch-in input{flex:1;border:0;outline:0;background:none;font-size:16px;color:var(--ink);min-width:0}
.hd-srch-in kbd{font:600 11px/1 ui-monospace,monospace;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:4px 6px}
.hd-srch-res{max-height:60vh;overflow:auto;padding:8px}
/* Tuỳ chỉnh nội dung */
html[data-fs="s"] .prose{font-size:15px}html[data-fs="l"] .prose{font-size:18.5px}
html.bw-focus .side{display:none}html.bw-focus .side+*,html.bw-focus .cols{grid-template-columns:minmax(0,1fr)!important}
@media (max-width:1100px){.ask-ai__ct{padding:5px 9px}.ask-ai__ct>span{display:none}}
@media (max-width:768px){.login-btn{display:none}.hd-ic{padding:0 6px}.hd-pop{position:fixed;left:12px;right:12px;top:64px;width:auto}}

/* ===== Tài khoản người đọc ===== */
button.login-btn{border:0;cursor:pointer;font-family:inherit}
.hd-av{width:34px;height:34px;margin-left:6px;border-radius:50%;border:0;padding:0;cursor:pointer;background:var(--p);color:#fff;font-weight:700;font-size:14px;display:grid;place-items:center;overflow:hidden}
.hd-av img{width:100%;height:100%;object-fit:cover}
.hd-upop{width:240px}.hd-uinfo{padding:8px 10px 10px;border-bottom:1px solid var(--line);margin-bottom:4px}
.hd-uinfo b{display:block;font-size:14px}.hd-uinfo small{color:var(--muted);font-size:12.5px;word-break:break-all}
.hd-mi{width:100%;text-align:left;border:0;background:none;padding:9px 10px;border-radius:8px;font:inherit;font-size:14px;color:var(--ink);cursor:pointer}
.hd-mi:hover{background:var(--muted-bg)}.hd-mi.bad{color:#d13b3b}
/* ===== Modal đăng nhập (theo claude.vn) ===== */
.lm{position:fixed;inset:0;z-index:10000;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .25s}
.lm[hidden]{display:none}.lm.on{opacity:1}
.lm-bd{position:absolute;inset:0;background:#00000073;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
.lm-wrap{position:relative;z-index:1;width:100%;max-width:400px;padding:20px}
.lm-card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:36px 32px 28px;box-shadow:0 20px 60px #00000026;transform:translateY(20px) scale(.97);transition:transform .3s cubic-bezier(.34,1.56,.64,1)}
.lm.on .lm-card{transform:none}
.lm-x{position:absolute;top:8px;right:8px;width:44px;height:44px;border:0;background:none;border-radius:8px;color:var(--muted);cursor:pointer;display:flex;align-items:center;justify-content:center}
.lm-x:hover{background:var(--muted-bg)}
.lm-head{text-align:center;margin-bottom:24px}.lm-logo{display:block;margin:0 auto 14px;height:40px;width:auto}
.lm-title{margin:0 0 4px;font-size:20px;font-weight:700;line-height:1.3;color:var(--ink)}
.lm-sub{margin:0;font-size:13px;color:var(--t2)}
.lm-social{display:flex;gap:10px}
.lm-sbtn{flex:1;height:44px;display:flex;align-items:center;justify-content:center;gap:10px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink);font-size:14px;font-weight:500;text-decoration:none;transition:background .15s,border-color .15s}
.lm-sbtn[hidden]{display:none}.lm-sbtn:hover{background:var(--muted-bg);color:var(--ink)}
.lm-div{display:flex;align-items:center;gap:12px;margin:20px 0;font-size:12px;color:var(--muted)}
.lm-div[hidden]{display:none}.lm-div:before,.lm-div:after{content:"";flex:1;height:1px;background:var(--line)}
.lm-form[hidden]{display:none}
.lm-tabs{display:flex;gap:4px;margin-bottom:20px;padding:4px;border-radius:12px;background:var(--muted-bg)}
.lm-tabs button{flex:1;height:36px;border:0;border-radius:9px;background:none;color:var(--t2);font:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s,color .15s}
.lm-tabs button.on{background:var(--card);color:var(--ink);box-shadow:0 1px 3px #0f1b331f}
.lm-form .lm-label{margin-top:12px}.lm-form>.lm-label:first-child,[data-reg-only] .lm-label,[data-reg-only][hidden]+.lm-label{margin-top:0}
.lm-form--otp{margin-top:16px}
.lm-pw{position:relative}.lm-pw .lm-input{padding-right:46px}
.lm-eye{position:absolute;top:50%;right:4px;width:38px;height:38px;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;border:0;border-radius:8px;background:none;color:var(--muted);cursor:pointer}
.lm-eye:hover,.lm-eye.is-on{color:var(--p)}.lm-label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.lm-input{width:100%;height:44px;border:1px solid var(--line);border-radius:10px;padding:0 14px;font:inherit;font-size:15px;background:var(--card);color:var(--ink);outline:none;box-sizing:border-box}
.lm-input:focus{border-color:var(--p);box-shadow:0 0 0 3px var(--p-soft)}
.lm-btn{width:100%;height:44px;margin-top:12px;border:0;border-radius:10px;background:var(--p);color:#fff;font:inherit;font-size:14.5px;font-weight:600;cursor:pointer;transition:background .15s}
.lm-btn:hover{background:var(--p2)}.lm-btn:disabled{opacity:.55;cursor:not-allowed}
.lm-note{margin:16px 0 0;text-align:center;font-size:12px;line-height:1.5;color:var(--faint)}
.lm-note[hidden]{display:none}
.lm-link{border:0;background:none;padding:0;font:inherit;color:var(--p);cursor:pointer}.lm-link:hover{text-decoration:underline}
.lm-otp{display:flex;gap:8px;justify-content:center;margin-bottom:4px}
.lm-otp input{width:44px;height:52px;text-align:center;font-size:22px;font-weight:700;border:1px solid var(--line);border-radius:10px;background:var(--page);color:var(--ink);outline:none}
.lm-otp input:focus{border-color:var(--p)}
.lm-err{margin:14px 0 0;text-align:center;font-size:13px;font-weight:500;color:#d13b3b}.lm-err[hidden]{display:none}
@media (max-width:520px){.lm-wrap{padding:16px}.lm-card{padding:28px 20px 24px;border-radius:14px}.lm-otp input{width:40px;height:48px}}
/* ===== Trợ lý AI (theo khung Ask AI của claude.vn, màu thương hiệu) ===== */
.cv-ai{--ai-p:var(--p);--ai-bc:1px solid #0f1b3329;--ai-bs:1px solid #0f1b3317;--ai-ease:cubic-bezier(.165,.85,.45,1);position:fixed;inset:0;z-index:1200;font-family:var(--sans)}
.cv-ai[hidden]{display:none}
html.cv-ai-lock{overflow:hidden}
.cv-ai__bd{position:absolute;inset:0;background:#0f1b3366;opacity:0;transition:opacity .22s}
.cv-ai.is-open .cv-ai__bd{opacity:1}
.cv-ai__panel{position:absolute;top:0;right:0;bottom:0;display:flex;flex-direction:column;width:min(424px,100%);background:var(--card);border-left:var(--ai-bc);box-shadow:-12px 0 48px #0f1b3324;transform:translateX(100%);transition:transform .26s var(--ai-ease),width .28s var(--ai-ease)}
.cv-ai.is-open .cv-ai__panel{transform:none}
.cv-ai.is-wide .cv-ai__panel{width:min(600px,100%)}
/* tay nắm bung rộng */
.cv-ai__handle{position:absolute;top:50%;left:0;z-index:3;width:26px;height:54px;padding:0;display:flex;align-items:center;justify-content:center;border:var(--ai-bc);border-right:none;border-radius:13px 0 0 13px;background:var(--card);color:var(--faint);cursor:pointer;transform:translate(-100%,-50%);box-shadow:-6px 0 18px #0f1b331a;transition:color .18s,background .18s,box-shadow .2s}
.cv-ai__handle:hover{color:var(--ai-p);background:color-mix(in oklab,var(--ai-p) 6%,var(--card));box-shadow:-8px 0 22px #0f1b3326}
.cv-ai__handle-chev{display:flex;transition:transform .24s var(--ai-ease)}
.cv-ai__handle.is-on .cv-ai__handle-chev{transform:rotate(180deg)}
.cv-ai__handle-label{position:absolute;top:50%;right:calc(100% + 9px);padding:5px 11px;border-radius:8px;background:var(--ink);color:#fff;font-size:12px;font-weight:600;white-space:nowrap;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-50%) translateX(8px);transition:opacity .18s,transform .18s}
.cv-ai__handle:hover .cv-ai__handle-label{opacity:1;visibility:visible;transform:translateY(-50%)}
/* đầu khung */
.cv-ai__head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 16px;background:color-mix(in oklab,var(--ai-p) 4%,var(--card));border-bottom:1px solid #0f1b331f}
.cv-ai__brand{display:flex;align-items:center;gap:9px;min-width:0}
.cv-ai__avatar{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;color:var(--ai-p);background:linear-gradient(135deg,color-mix(in srgb,var(--ai-p) 18%,transparent),color-mix(in srgb,var(--ai-p) 8%,transparent));box-shadow:0 2px 7px -1px color-mix(in srgb,var(--ai-p) 50%,transparent)}
.cv-ai__switch-seg{display:flex;gap:2px;padding:3px;border-radius:99px;background:var(--muted-bg)}
.cv-ai__switch-btn{position:relative;display:flex;align-items:center;gap:5px;padding:4px 11px;border-radius:99px;font-size:12.5px;font-weight:600;color:var(--muted)}
.cv-ai__switch-btn.is-on{background:var(--card);color:var(--ink);box-shadow:0 1px 1px #0f1b3308,0 3px 6px #0f1b330a,0 8px 16px -8px #0f1b330f}
.cv-ai__switch-btn.is-on:before{content:"";position:absolute;inset:-1px;padding:1px;border-radius:inherit;pointer-events:none;background:conic-gradient(from var(--ask-ai-angle,0deg),#f472b6,#818cf8,#38bdf8,#34d399,#fbbf24,#fb923c,#f472b6);animation:ask-ai-spin 3s linear infinite;-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask:linear-gradient(#fff 0 0) content-box exclude,linear-gradient(#fff 0 0)}
.cv-ai__tools{flex-shrink:0;display:flex;align-items:center;gap:3px}
.cv-ai__tool{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:0;border-radius:8px;background:none;color:var(--muted);cursor:pointer;transition:background .15s,color .15s,box-shadow .15s}
.cv-ai__tool:hover{background:var(--card);color:var(--ink);box-shadow:0 1px 3px #0f1b331f}
.cv-ai__tool--close:hover{color:#dc3c3c}
/* thân: nền sóng nhẹ, lời chào nằm sát đáy */
.cv-ai__body{position:relative;z-index:0;flex:1;display:flex;flex-direction:column;gap:14px;padding:16px 20px 18px;overflow-y:auto;overflow-x:hidden;font-size:15px;line-height:1.7;color:var(--ink)}
/* nền kẻ ô vuông như hero trang học tập (.lc-hero, ô 28px): trắng + ô navy mờ, cuộn theo nội dung */
.cv-ai__body{background-color:#fff;background-image:linear-gradient(#0f1b3312 1px,transparent 1px),linear-gradient(90deg,#0f1b3312 1px,transparent 1px);background-size:28px 28px;background-position:-1px -1px;background-attachment:local}
.cv-ai__welcome{display:flex;flex-direction:column;align-items:stretch;margin-top:auto;padding:28px 0 2px;text-align:left}
.cv-ai__welcome[hidden]{display:none}
.cv-ai__welcome-avatar{display:flex;align-items:center;justify-content:center;width:46px;height:46px;margin-bottom:11px;border-radius:14px;color:#fff;background:linear-gradient(135deg,var(--ai-p),color-mix(in oklab,var(--ai-p) 55%,#5b8def));box-shadow:0 4px 12px -2px color-mix(in srgb,var(--ai-p) 50%,transparent)}
.cv-ai__welcome h4{margin:0 0 4px;font-size:16.5px;font-weight:600;line-height:1.3;letter-spacing:-.01em;color:var(--ink)}
.cv-ai__welcome p{max-width:300px;margin:0 0 14px;font-size:14px;line-height:1.5;color:var(--t2)}
.cv-ai__login{display:flex;align-items:center;gap:9px;width:100%;margin:2px 0 4px;padding:9px 12px;border-radius:8px;background:color-mix(in srgb,var(--ai-p) 6%,transparent);border:1px solid color-mix(in srgb,var(--ai-p) 22%,transparent);box-sizing:border-box}
.cv-ai__login[hidden]{display:none}
.cv-ai__login svg{flex:none;color:var(--ai-p)}
.cv-ai__login span{flex:1;font-size:12.5px;line-height:1.45;color:#0f1b33d1}
.cv-ai__login button{flex:none;padding:6px 13px;border:0;border-radius:999px;background:var(--ai-p);color:#fff;font:700 12px/1.25 var(--sans);cursor:pointer;transition:background .15s}
.cv-ai__login button:hover{background:var(--p2)}
.cv-ai__modes{display:flex;flex-direction:column;gap:7px;width:100%;margin-top:6px}
.cv-ai__modes[hidden],.cv-ai__starters[hidden]{display:none}
.cv-ai__mode{display:flex;align-items:center;gap:11px;padding:9px 11px;border:var(--ai-bc);border-radius:11px;background:var(--card);text-align:left;font:inherit;cursor:pointer;transition:border-color .16s var(--ai-ease),box-shadow .16s var(--ai-ease),transform .16s var(--ai-ease)}
.cv-ai__mode:hover{border-color:var(--mc);box-shadow:0 1px 1px #0f1b3308,0 3px 6px #0f1b330a,0 8px 16px -8px #0f1b330f;transform:translateY(-1px)}
.cv-ai__mode-ic{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:9px;font-size:16px;background:color-mix(in srgb,var(--mc) 14%,transparent)}
.cv-ai__mode-tx{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.cv-ai__mode-t{font-size:13.5px;font-weight:700;line-height:1.2;color:var(--ink)}
.cv-ai__mode-d{font-size:11.5px;line-height:1.2;color:var(--muted)}
.cv-ai__mode-go{flex-shrink:0;color:var(--faint)}
.cv-ai__mode:hover .cv-ai__mode-go{color:var(--mc)}
.cv-ai__starters{display:flex;flex-direction:column;align-items:flex-start;gap:7px;margin-top:6px}
.cv-ai__chip{padding:7px 12px;border:var(--ai-bc);border-radius:99px;background:var(--card);color:var(--ink);font:500 12.5px/1.4 var(--sans);text-align:left;cursor:pointer;transition:border-color .15s,color .15s}
.cv-ai__chip:hover{border-color:var(--ai-p);color:var(--ai-p)}
.cv-ai__back{margin-top:4px;padding:2px 0;border:0;background:none;color:var(--muted);font:600 12px var(--sans);cursor:pointer}
.cv-ai__back:hover{color:var(--ai-p)}
/* tin nhắn */
.cv-ai__msg{max-width:85%;font-size:14.5px;line-height:1.55;border-radius:14px}
.cv-ai__msg--me{align-self:flex-end;padding:10px 16px;border-radius:18px;background:var(--ai-p);color:#fff;font-weight:500;box-shadow:0 1px 2px #0f1b3314;white-space:pre-wrap;word-wrap:break-word}
.cv-ai__answer-wrap{align-self:flex-start;display:flex;flex-direction:column;gap:8px;max-width:100%;width:100%}
.cv-ai__answer{max-width:100%;color:var(--ink)}
.cv-ai__ap{margin:0 0 10px;line-height:1.65}
.cv-ai__aul{margin:0 0 10px;padding-left:20px}
.cv-ai__aul li{margin:0 0 4px;padding-left:2px}
.cv-ai__aul li::marker{color:var(--ai-p)}
.cv-ai__answer>:last-child{margin-bottom:0}
.cv-ai__link{color:var(--ai-p);font-weight:600;text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--ai-p) 35%,transparent);text-underline-offset:3px}
.cv-ai__link:hover{text-decoration-color:currentColor}
.cv-ai__answer code{padding:1px 5px;border-radius:5px;background:var(--code);font:13px var(--mono)}
.cv-ai__err{margin:0;padding:10px 12px;border-radius:10px;background:#dc3c3c0f;border:1px solid #dc3c3c2e;color:#b42f2f;font-size:13.5px}
.cv-ai__err button{margin-left:6px;padding:4px 12px;border:0;border-radius:99px;background:var(--ai-p);color:#fff;font:700 12px var(--sans);cursor:pointer}
.cv-ai__typing{display:inline-flex;align-items:center;gap:4px;padding:8px 0}
.cv-ai__typing span{width:7px;height:7px;border-radius:50%;background:var(--muted);animation:cvAiDot 1s ease-in-out infinite}
.cv-ai__typing span:nth-child(2){animation-delay:.15s}.cv-ai__typing span:nth-child(3){animation-delay:.3s}
@keyframes cvAiDot{0%,80%,100%{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
/* trích dẫn */
.cv-ai__cite-wrap{position:relative;display:inline-block}
.cv-ai__cite{display:inline-flex;align-items:center;justify-content:center;min-width:16px;height:16px;margin-left:3px;padding:0 4px;border-radius:5px;background:color-mix(in srgb,var(--ai-p) 13%,transparent);color:var(--ai-p);font:700 10.5px/1 var(--mono);text-decoration:none;vertical-align:top;transform:translateY(-2px);transition:background .14s,color .14s;box-sizing:border-box}
.cv-ai__cite:hover{background:var(--ai-p);color:#fff}
.cv-ai__cite-pop{position:absolute;bottom:calc(100% + 8px);left:-60px;z-index:6;display:flex;flex-direction:column;gap:5px;width:250px;max-width:64vw;padding:11px 13px;border:var(--ai-bc);border-radius:8px;background:var(--card);box-shadow:0 4px 8px -2px #0f1b330f,0 12px 28px -4px #0f1b3317,0 28px 56px -16px #0f1b331c;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(4px);transition:opacity .16s,transform .16s;line-height:1.5}
.cv-ai__cite-wrap:hover .cv-ai__cite-pop{opacity:1;visibility:visible;transform:none}
.cv-ai__cite-pop-head{font-size:12px;font-weight:700;color:var(--ink)}
.cv-ai__cite-pop-quote{font-size:12px;color:var(--t2)}
.cv-ai__cite-pop-go{font-size:11px;font-weight:600;color:var(--ai-p)}
.cv-ai__cites{margin:14px 0 0;padding-top:10px;border-top:1px solid #0f1b3317}
.cv-ai__cites-title{display:flex;align-items:center;gap:8px;list-style:none;cursor:pointer;font-size:11px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--ai-p)}
.cv-ai__cites-title::-webkit-details-marker{display:none}
.cv-ai__sources-chev{flex-shrink:0;width:7px;height:7px;border-right:1.6px solid;border-bottom:1.6px solid;transform:rotate(-45deg);transition:transform .18s var(--ai-ease)}
.cv-ai__sources[open] .cv-ai__sources-chev{transform:rotate(45deg) translateY(-2px)}
.cv-ai__cites-list{display:flex;flex-direction:column;gap:5px;margin:8px 0 0;padding:0;list-style:none}
.cv-ai__cite-src{display:flex;align-items:center;gap:9px;padding:7px 9px;border-radius:8px;background:var(--page);text-decoration:none;transition:background .16s}
.cv-ai__cite-src:hover{background:color-mix(in srgb,var(--ai-p) 8%,transparent)}
.cv-ai__cite-src-n{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:5px;background:color-mix(in srgb,var(--ai-p) 14%,transparent);color:var(--ai-p);font:700 11px var(--mono)}
.cv-ai__cite-src-body{flex:1;display:flex;flex-direction:column;min-width:0;line-height:1.4}
.cv-ai__cite-src-t{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:600;color:var(--ink)}
.cv-ai__cite-src-sec{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:11.5px;color:var(--muted)}
.cv-ai__cite-src-go{flex-shrink:0;color:var(--faint)}
.cv-ai__cite-src:hover .cv-ai__cite-src-go{color:var(--ai-p)}
/* hành động + hỏi tiếp */
.cv-ai__msg-actions{display:flex;align-items:center;gap:2px;margin-top:6px}
.cv-ai__msg-actions button{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:0;border-radius:99px;background:none;color:color-mix(in srgb,var(--ai-p) 62%,transparent);cursor:pointer;transition:background .15s,color .15s}
.cv-ai__msg-actions button:hover{background:color-mix(in srgb,var(--ai-p) 8%,transparent);color:var(--ai-p)}
.cv-ai__msg-actions button.is-on{background:color-mix(in srgb,var(--ai-p) 10%,transparent);color:var(--ai-p)}
.cv-ai__followups{display:flex;flex-direction:column;align-items:flex-start;gap:2px;margin-top:2px}
.cv-ai__followups-label{display:flex;align-items:center;gap:6px;margin-bottom:2px;font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted)}
.cv-ai__chip--fu{display:flex;align-items:flex-start;gap:8px;padding:5px 0;border:0;border-radius:6px;background:none;color:var(--ai-p);font-size:14px;font-weight:500;line-height:1.5}
.cv-ai__chip--fu:hover{text-decoration:underline;text-underline-offset:3px}
.cv-ai__fu-ic{flex-shrink:0;margin-top:4px;opacity:.5;transition:opacity .15s}
.cv-ai__chip--fu:hover .cv-ai__fu-ic{opacity:1}
/* lịch sử */
.cv-ai__history{position:absolute;top:57px;left:0;right:0;bottom:0;z-index:4;display:flex;flex-direction:column;background:var(--card)}
.cv-ai__history[hidden]{display:none}
.cv-ai__history-head{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #0f1b3317;font-size:14px}
.cv-ai__conv-list{flex:1;overflow-y:auto;padding:8px}
.cv-ai__conv{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;cursor:pointer;transition:background .15s}
.cv-ai__conv:hover{background:var(--page)}
.cv-ai__conv-ic{flex-shrink:0;display:flex;color:var(--ai-p)}
.cv-ai__conv-info{flex:1;display:flex;flex-direction:column;min-width:0;line-height:1.4}
.cv-ai__conv-title{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:13.5px;font-weight:600;color:var(--ink)}
.cv-ai__conv-time{font-size:11.5px;color:var(--muted)}
.cv-ai__conv-del{flex-shrink:0;width:26px;height:26px;border:0;border-radius:6px;background:none;color:var(--faint);font-size:18px;cursor:pointer;opacity:0}
.cv-ai__conv:hover .cv-ai__conv-del{opacity:1}.cv-ai__conv-del:hover{background:#dc3c3c14;color:#dc3c3c}
.cv-ai__empty{margin:0;padding:40px 20px;text-align:center;font-size:14px;color:var(--muted)}
/* chân: lượt còn lại + ô hỏi */
.cv-ai__quota{padding:9px 16px 2px;text-align:center;font-size:11.5px;line-height:1.4;color:var(--muted)}
.cv-ai__quota[hidden]{display:none}
.cv-ai__quota strong{color:var(--ai-p);font-weight:700}
.cv-ai__quota button{padding:0;border:0;background:none;color:var(--ai-p);font:600 11.5px var(--sans);text-decoration:underline;cursor:pointer}
.cv-ai__foot{display:flex;padding:10px 18px 18px;margin:0}
.cv-ai__inputbar{flex:1;display:flex;align-items:center;gap:8px;min-height:50px;padding:5px 6px 5px 18px;border:1px solid #0f1b3329;border-radius:99px;background:var(--card);box-shadow:0 1px 3px #0f1b330d;transition:border-color .16s,box-shadow .16s;box-sizing:border-box}
.cv-ai__inputbar:focus-within{border-color:color-mix(in srgb,var(--ai-p) 65%,transparent);box-shadow:0 0 0 3px color-mix(in srgb,var(--ai-p) 10%,transparent)}
.cv-ai__in{flex:1;min-width:0;padding:8px 0;border:0;outline:0;background:none;color:var(--ink);font:14.5px var(--sans)}
.cv-ai__in::placeholder{color:var(--faint)}
.cv-ai__send,.cv-ai__stop{flex-shrink:0;display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;cursor:pointer}
.cv-ai__send{border:0;background:var(--ai-p);color:#fff;transition:background .16s,color .16s,transform .12s}
.cv-ai__send:not(:disabled):active{transform:scale(.92)}
.cv-ai__send:disabled{background:var(--muted-bg);color:var(--faint);cursor:default}
.cv-ai__send[hidden],.cv-ai__stop[hidden]{display:none}
.cv-ai__stop{border:1px solid color-mix(in srgb,var(--ai-p) 40%,transparent);background:color-mix(in srgb,var(--ai-p) 8%,transparent)}
.cv-ai__stop span{width:12px;height:12px;border-radius:2px;background:var(--ai-p)}
@media (max-width:520px){.cv-ai__panel{width:100%;border-left:0}.cv-ai__handle{display:none}.cv-ai__body{padding:14px 16px}.cv-ai__foot{padding:8px 12px 14px}}
@media (prefers-reduced-motion:reduce){.cv-ai__switch-btn.is-on:before{animation:none}}