:root{
  --bg:#f3f4f7; --surface:#ffffff; --band:#e8ebf2; --ink:#18233d; --muted:#5a6580; --line:#d6dbe6;
  --accent:#b8791a; --accent-ink:#8a5a0f; --accent-soft:#f6ead3; --deep:#1c2b4f; --on-deep:#f3f4f7;
  --lock:#6b4fa0; --lock-soft:#ece6f6; --free:#1f7a55; --free-soft:#e0f1e8;
  --l1:#1c2b4f; --l2:#34548f; --l3:#2a7c5f; --l4:#b8791a; --l5:#a8432f;
  --f-display:"Literata",Georgia,"Times New Roman",serif;
  --f-body:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#10141f; --surface:#171d2c; --band:#1b2235; --ink:#e6e9f1; --muted:#9aa3ba; --line:#2b3348;
  --accent:#e2a548; --accent-ink:#f0bd6b; --accent-soft:#33291a; --deep:#0b1020; --on-deep:#e6e9f1;
  --lock:#b29ae0; --lock-soft:#2a2340; --free:#5fcf9c; --free-soft:#173327;
  --l1:#2e3f6b; --l2:#3d5f9e; --l3:#2a7c5f; --l4:#a8700f; --l5:#a3402d; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#10141f; --surface:#171d2c; --band:#1b2235; --ink:#e6e9f1; --muted:#9aa3ba; --line:#2b3348;
  --accent:#e2a548; --accent-ink:#f0bd6b; --accent-soft:#33291a; --deep:#0b1020; --on-deep:#e6e9f1;
  --lock:#b29ae0; --lock-soft:#2a2340; --free:#5fcf9c; --free-soft:#173327;
  --l1:#2e3f6b; --l2:#3d5f9e; --l3:#2a7c5f; --l4:#a8700f; --l5:#a3402d; color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(64px + env(safe-area-inset-top,0px))}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15.5px;line-height:1.6}
.in{max-width:1120px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
h1,h2,h3{font-family:var(--f-display);text-wrap:balance;margin:0;line-height:1.2}
h2{font-size:clamp(26px,3.6vw,36px);font-weight:700}
h3{font-size:19px;font-weight:700}
p{margin:0}
a{color:inherit}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;color:var(--accent-ink)}
.lede{color:var(--muted);max-width:62ch;font-size:16.5px}
.num{font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;font-size:15px;border-radius:10px;padding:11px 18px;text-decoration:none;cursor:pointer;border:1.5px solid transparent;transition:transform .15s}
.btn:hover{transform:translateY(-1px)}
.btn-main{background:var(--accent);color:#1a1205}
.btn-line{border-color:var(--line);background:var(--surface);color:var(--ink)}
.btn:focus-visible,button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;padding:3px 9px;border-radius:999px;white-space:nowrap}
.t-free{background:var(--free-soft);color:var(--free)}
.t-lock{background:var(--lock-soft);color:var(--lock)}
.t-soon{background:var(--band);color:var(--muted)}

/* dải báo bản khung */
.draft{background:var(--accent-soft);color:var(--accent-ink);font-size:13px}
.draft .in{padding-block:8px}

/* menu */
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:var(--surface);border-bottom:1px solid var(--line)}
.nav .in{display:flex;align-items:center;gap:20px;height:64px}
.logo{font-family:var(--f-display);font-weight:700;font-size:22px;text-decoration:none;letter-spacing:-.01em}
.logo span{color:var(--accent)}
.menu{display:flex;gap:4px;margin-left:auto;align-items:center}
.menu a{text-decoration:none;font-size:14.5px;font-weight:500;padding:8px 10px;border-radius:8px;color:var(--muted)}
.menu a:hover{color:var(--ink);background:var(--band)}
.menu .btn{color:#1a1205;padding:8px 14px;margin-left:6px}
.burger{display:none;margin-left:auto;font:inherit;background:none;border:1px solid var(--line);border-radius:8px;padding:6px 12px;color:var(--ink);cursor:pointer}
@media (max-width:920px){
  .burger{display:block}
  .menu{display:none;position:absolute;left:0;right:0;top:64px;background:var(--surface);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px max(16px,env(safe-area-inset-right,0px)) 14px max(16px,env(safe-area-inset-left,0px))}
  .menu.open{display:flex}
  .menu .btn{margin:6px 0 0}
}

section{padding-block:64px}
section.alt{background:var(--band)}
.head{display:flex;flex-direction:column;gap:10px;margin-bottom:32px}

/* hero */
.hero{padding-block:56px 64px}
.hero .in{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:48px;align-items:center}
.hero h1{font-size:clamp(32px,4.8vw,50px);font-weight:700;letter-spacing:-.02em;line-height:1.06}
.hero h1 em{font-style:italic;color:var(--accent-ink)}
.hero .copy{display:flex;flex-direction:column;gap:20px}
.cta{display:flex;flex-wrap:wrap;gap:10px}
.quote{border-left:3px solid var(--accent);padding-left:14px;color:var(--muted);font-size:14.5px}
.quote b{color:var(--ink);font-weight:600}
.pillars{display:flex;flex-direction:column;gap:10px}
.pillar{display:grid;grid-template-columns:52px minmax(0,1fr);gap:14px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.pillar .ic{width:52px;height:52px;border-radius:12px;display:grid;place-items:center;background:var(--deep);color:var(--on-deep);font-family:var(--f-display);font-weight:700;font-size:22px}
.pillar b{display:block;font-size:16px}
.pillar span{color:var(--muted);font-size:14px}
@media (max-width:860px){.hero .in{grid-template-columns:minmax(0,1fr);gap:32px}}

/* hành trình */
.path{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;counter-reset:s}
.stop{position:relative;padding:0 10px 0 0;display:flex;flex-direction:column;gap:6px}
.stop .dot{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px;background:var(--surface);border:2px solid var(--accent);color:var(--accent-ink);position:relative;z-index:1}
.stop:not(:last-child)::before{content:"";position:absolute;left:34px;right:0;top:16px;height:2px;background:var(--line)}
.stop b{font-size:15px;margin-top:6px}
.stop span{font-size:13.5px;color:var(--muted)}
.stop.later .dot{border-style:dashed;border-color:var(--muted);color:var(--muted)}
@media (max-width:860px){
  .path{grid-template-columns:minmax(0,1fr);gap:14px}
  .stop{display:grid;grid-template-columns:34px minmax(0,1fr);column-gap:14px;padding:0}
  .stop .dot{grid-row:span 3}
  .stop b{margin-top:4px}
  .stop:not(:last-child)::before{left:16px;top:34px;bottom:-14px;right:auto;width:2px;height:auto}
}

/* công cụ */
.tools{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:24px;align-items:start}
@media (max-width:920px){.tools{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:14px;min-width:0}
.card .top{display:flex;justify-content:space-between;gap:10px;align-items:flex-start;flex-wrap:wrap}
.card .desc{color:var(--muted);font-size:14.5px}
.q{border:0;margin:0;padding:12px 0 0;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.q legend{float:left;width:100%;font-weight:600;font-size:14.5px;padding:0;margin-bottom:8px}
.q legend small{font-weight:500;color:var(--muted);font-size:12px;margin-left:6px;text-transform:uppercase;letter-spacing:.08em}
.opts{display:flex;flex-wrap:wrap;gap:6px}
.opts label{cursor:pointer}
.opts input{position:absolute;opacity:0;pointer-events:none}
.opts span{display:inline-block;font-size:13.5px;padding:6px 11px;border-radius:8px;border:1px solid var(--line);background:var(--bg)}
.opts input:checked + span{background:var(--deep);color:var(--on-deep);border-color:var(--deep)}
.opts input:focus-visible + span{outline:2px solid var(--accent);outline-offset:2px}
.result{background:var(--deep);color:var(--on-deep);border-radius:12px;padding:16px 18px;display:flex;flex-direction:column;gap:6px}
.result .lab{font-size:12px;letter-spacing:.12em;text-transform:uppercase;opacity:.75}
.result h3{font-size:24px;color:var(--on-deep)}
.result p{font-size:14.5px;opacity:.92}
.meters{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;margin-top:4px}
.meter span{font-size:12.5px;opacity:.8}
.bar{height:6px;border-radius:3px;background:rgba(255,255,255,.18);margin-top:4px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--accent);border-radius:3px;transition:width .3s}
.fine{font-size:12.5px;color:var(--muted)}

.meters2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}
.meters2 div{background:var(--bg);border-radius:10px;padding:12px 14px;display:flex;flex-direction:column;gap:4px;min-width:0}
.meters2 b{font-size:14px}
.meters2 span{font-size:13px;color:var(--muted)}
@media (max-width:440px){.meters2{grid-template-columns:minmax(0,1fr)}}
.profiles{display:flex;flex-wrap:wrap;gap:6px}
.courses{display:flex;flex-direction:column;gap:0;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.course{display:grid;grid-template-columns:92px minmax(0,1fr);gap:4px 10px;align-items:center;padding:10px 12px;border-bottom:1px solid var(--line);font-size:14.5px}
.course:last-child{border-bottom:0}
.course .tag{justify-self:start}
.course span:not(.tag){grid-column:2;font-size:12.5px;color:var(--muted)}
.pricebox{display:flex;flex-direction:column;gap:6px}
.pricebox s{font-size:20px;color:var(--muted);font-weight:500;margin-right:6px}
/* tháp xem trước */
.pyr{display:flex;flex-direction:column;gap:5px}
.lyr{height:58px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;color:#fff;background:var(--lc);padding:0 10px}
.lyr b{font-size:15px;line-height:1.2}
.lyr span{font-size:12px;opacity:.85}
.lyr.hl{box-shadow:inset 0 0 0 3px var(--accent)}
.lockrow{display:flex;gap:10px;align-items:center;background:var(--lock-soft);color:var(--lock);border-radius:10px;padding:10px 12px;font-size:13.5px}

/* 4 mục */
.grid4{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
@media (max-width:760px){.grid4{grid-template-columns:minmax(0,1fr)}}
.sec ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:4px;font-size:14.5px}
.sec .no{font-family:var(--f-display);font-size:15px;color:var(--accent-ink);font-weight:700}
.note{background:var(--bg);border:1px dashed var(--line);border-radius:10px;padding:12px 14px;font-size:13.5px;color:var(--muted);display:flex;flex-direction:column;gap:8px}
.note b{color:var(--ink)}
.links{display:flex;flex-wrap:wrap;gap:8px}
.links .btn{font-size:13.5px;padding:8px 12px}

/* bảng gói */
.tablebox{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:16px}
table{border-collapse:collapse;width:100%;min-width:560px}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14.5px;vertical-align:top}
thead th{font-family:var(--f-display);font-size:18px;border-bottom:2px solid var(--ink)}
thead th small{display:block;font-family:var(--f-body);font-size:13px;color:var(--muted);font-weight:500;margin-top:2px}
td.c{text-align:center;width:150px}
tr:last-child td{border-bottom:0}
.yes{color:var(--free);font-weight:700}
.no{color:var(--muted)}
.part{color:var(--accent-ink);font-weight:600;font-size:13px}
.price{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;margin-top:18px}

/* sản phẩm */
.prods{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:20px}
@media (max-width:860px){.prods{grid-template-columns:minmax(0,1fr)}}
.big{font-family:var(--f-display);font-size:32px;font-weight:700}
.big small{font-family:var(--f-body);font-size:14px;font-weight:500;color:var(--muted)}
.steps{display:flex;flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;counter-reset:k}
.steps li{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;font-size:14.5px;counter-increment:k}
.steps li::before{content:counter(k);width:28px;height:28px;border-radius:50%;background:var(--accent-soft);color:var(--accent-ink);display:grid;place-items:center;font-weight:700;font-size:13px}
.soon{border-style:dashed;background:transparent}

/* nội quy */
.rules{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
@media (max-width:760px){.rules{grid-template-columns:minmax(0,1fr)}}
.rule{display:flex;flex-direction:column;gap:6px;border-top:3px solid var(--deep);padding-top:12px}
.rule b{font-size:15.5px}
.rule span{color:var(--muted);font-size:14px}

/* đăng ký */
.join{background:var(--deep);color:var(--on-deep)}
.join .in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:center}
@media (max-width:860px){.join .in{grid-template-columns:minmax(0,1fr)}}
.join h2{color:var(--on-deep)}
.join .lede{color:var(--on-deep);opacity:.8}
form{display:flex;flex-direction:column;gap:12px;background:var(--surface);color:var(--ink);border-radius:16px;padding:22px}
label.f{display:flex;flex-direction:column;gap:5px;font-size:14px;font-weight:600}
label.f small{font-weight:400;color:var(--muted)}
input[type=email],input[type=text]{font:inherit;font-size:15px;padding:10px 12px;border-radius:9px;border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.consent{display:grid;grid-template-columns:20px minmax(0,1fr);gap:10px;font-size:13px;color:var(--muted);align-items:start}
.consent input{width:18px;height:18px;margin:2px 0 0;accent-color:var(--accent)}
.msg{font-size:13.5px;border-radius:9px;padding:10px 12px}
.msg.ok{background:var(--free-soft);color:var(--free)}
.msg.err{background:var(--accent-soft);color:var(--accent-ink)}

footer{padding-block:36px 48px;font-size:13.5px;color:var(--muted)}
footer .in{display:flex;flex-direction:column;gap:12px}
footer .warn{color:var(--ink);font-weight:500;max-width:80ch}
footer .row{display:flex;flex-wrap:wrap;gap:8px 24px}

/* tài khoản, nội dung */
.page{padding-block:40px 64px}
.page .in{display:flex;flex-direction:column;gap:24px}
.acc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:24px;align-items:start}
@media (max-width:860px){.acc{grid-template-columns:minmax(0,1fr)}}
.kv{display:grid;grid-template-columns:120px minmax(0,1fr);gap:8px 12px;font-size:14.5px}
.kv dt{color:var(--muted)} .kv dd{margin:0;font-weight:600;min-width:0;overflow-wrap:anywhere}
.qrbox{display:grid;grid-template-columns:220px minmax(0,1fr);gap:20px;align-items:start}
@media (max-width:560px){.qrbox{grid-template-columns:minmax(0,1fr)}}
.qrbox img{width:220px;max-width:100%;border-radius:12px;background:#fff;padding:8px;border:1px solid var(--line)}
.code{font-family:ui-monospace,Menlo,monospace;font-size:18px;font-weight:700;background:var(--accent-soft);color:var(--accent-ink);padding:4px 10px;border-radius:8px;letter-spacing:.06em}
.wait{display:flex;gap:10px;align-items:center;font-size:14px;color:var(--muted)}
.spin{width:16px;height:16px;border-radius:50%;border:2px solid var(--line);border-top-color:var(--accent);animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.spin{animation:none}}
.list{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 14px;align-items:center;padding:14px 16px;border-bottom:1px solid var(--line);text-decoration:none}
.item:last-child{border-bottom:0}
a.item:hover{background:var(--band)}
.item b{font-size:15px} .item span.d{grid-column:1;font-size:13px;color:var(--muted)}
.item .tag{grid-row:1 / span 2;grid-column:2}
.video{position:relative;aspect-ratio:16/9;max-width:100%;border-radius:12px;overflow:hidden;background:var(--deep)}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.prose{max-width:70ch;display:flex;flex-direction:column;gap:12px;font-size:15.5px}
.prose h2{font-size:24px;margin-top:12px} .prose ul{margin:0;padding-left:20px}

[hidden]{display:none!important}