:root{--ink:#1E2430;--soft:#3A4252;--muted:#5A6272;--bg:#FFFDF6;--line:#EFE9D8;--accent:#C2410C;--y:#FFD900;--g:#8FC31F;--p:#EF5D9C;--b:#50A8DE;--head:'Fredoka','Nunito',sans-serif}
html[lang="vi"]{--head:'Nunito',sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:'Nunito Sans',system-ui,sans-serif;line-height:1.6;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:#1F4E79}
h1,h2,h3{margin:0;line-height:1.2;font-family:var(--head);font-weight:700}
html[lang="vi"] h1,html[lang="vi"] h2{font-weight:800}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}
section{padding:72px 0}
.band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.dark{background:var(--ink);color:#fff}
.dark p,.dark span{color:#D6DBE4}
h2{font-size:clamp(28px,3.6vw,40px);margin-bottom:12px}
.intro{color:var(--soft);font-size:18px;max-width:640px;margin:0 0 32px}
.dark .intro{color:#C9CFDA}

/* header */
.top{position:sticky;top:0;z-index:10;background:rgba(255,253,246,.92);backdrop-filter:blur(8px);border-bottom:1px solid transparent}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:10px;font-family:'Fredoka','Nunito',sans-serif;font-weight:600;font-size:21px;color:var(--ink);text-decoration:none;white-space:nowrap}
.dots{display:flex;gap:4px}.dots i{width:11px;height:11px;border-radius:50%;display:block}
nav{display:flex;align-items:center;gap:22px;font-weight:700;font-size:15px}
nav a{color:var(--ink);text-decoration:none}
nav a:hover{color:var(--accent)}
.lang{display:flex;gap:2px;border:2px solid var(--line);border-radius:999px;padding:2px;font-size:13px}
.lang a{padding:3px 9px;border-radius:999px;color:var(--muted)}
.lang a.on{background:var(--ink);color:#fff}
.menu-links{display:flex;gap:22px}
@media (max-width:900px){.menu-links{display:none}}

.btn{display:inline-block;text-decoration:none;font-weight:700;padding:14px 26px;border-radius:999px;background:var(--accent);color:#fff!important;border:2px solid var(--accent);transition:transform .15s}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;border-color:var(--ink);color:var(--ink)!important}
.btn.light{background:var(--y);border-color:var(--y);color:var(--ink)!important}
.btn.sm{padding:9px 18px;font-size:14px}
.row{display:flex;flex-wrap:wrap;gap:12px}

/* hero */
.hero{display:flex;flex-wrap:wrap;gap:48px;align-items:center;padding-top:32px;padding-bottom:24px}
.hero-text{flex:1 1 440px;min-width:0}
.tag{display:inline-block;font-size:13px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:#3D6B1A;background:#EAF5D6;padding:6px 14px;border-radius:999px}
.hero h1{font-size:clamp(38px,5.6vw,62px);margin:18px 0}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 62%,#FFE866 62%)}
.lead{font-size:20px;color:var(--soft);margin:0 0 26px}
.note{color:var(--muted);font-size:15px;margin-top:18px}
.hero-art{flex:1 1 380px;min-width:0;display:flex;justify-content:center;position:relative;padding:20px 0}
.blob{position:absolute;inset:6% 4%;border-radius:48% 52% 44% 56%/52% 44% 56% 48%;background:#FFF1A8}
.phones{position:relative;display:flex;gap:18px;align-items:flex-end}
.phone{width:210px;border-radius:30px;background:var(--ink);padding:8px;box-shadow:0 24px 48px -18px rgba(30,36,48,.45)}
.phone img{border-radius:23px}
.phone.back{transform:translateY(-36px) rotate(-4deg)}
.phone.front{transform:rotate(3deg)}
.chip{position:absolute;background:#fff;border-radius:999px;padding:8px 14px;font-weight:800;font-size:14px;box-shadow:0 8px 20px -8px rgba(0,0,0,.25);white-space:nowrap}
.chip.c1{left:-6px;top:22%}
.chip.c2{right:-4px;bottom:16%}
@media (max-width:560px){.phone{width:150px;border-radius:22px;padding:6px}.phone img{border-radius:17px}.chip{font-size:12px}}

/* cards */
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{border-radius:24px;padding:28px}
.card h3{font-size:22px}
.card p{margin:8px 0 0;color:var(--soft)}
.ic{font-size:34px;display:block;margin-bottom:10px}

/* day timeline */
.day{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));counter-reset:s}
.step{position:relative;background:#fff;border:2px solid var(--line);border-radius:22px;padding:24px 22px 22px}
.step .time{display:inline-block;font-size:13px;font-weight:800;padding:3px 10px;border-radius:999px;margin-bottom:10px}
.step h3{font-size:19px;margin-bottom:6px}
.step p{margin:0;color:var(--soft)}
.step .min{position:absolute;top:22px;right:20px;color:var(--muted);font-weight:700;font-size:14px}

/* levels */
.lv{border-radius:20px;padding:22px;border:3px solid;background:#fff}
.lv b{font-family:'Fredoka','Nunito',sans-serif;font-size:24px;display:block}
.lv span{color:var(--muted)}
.books{margin-top:28px}
.books h3{font-size:20px}
.books p{color:var(--soft);margin:6px 0 0}

/* home */
.tile{background:#2B3342;border-radius:20px;padding:24px}
.tile b{display:block;font-size:18px;margin-bottom:4px}
.home-cta{margin-top:28px}

/* directors */
.split{display:flex;flex-wrap:wrap;gap:40px;align-items:center}
.split>div{flex:1 1 360px;min-width:0}
.checks{list-style:none;padding:0;margin:0}
.checks li{position:relative;padding-left:34px;margin:12px 0;font-size:18px;color:var(--soft)}
.checks li:before{content:"✓";position:absolute;left:0;top:1px;width:24px;height:24px;border-radius:50%;background:#EAF5D6;color:#3D6B1A;font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center}
.board{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;font-size:15px}
.board table{width:100%;border-collapse:collapse}
.board th,.board td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
.board th{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:#FBF8EF}
.bar{height:8px;border-radius:99px;background:#F1ECDD;overflow:hidden;min-width:60px}
.bar i{display:block;height:100%;border-radius:99px}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 22px;margin-bottom:12px}
summary{font-weight:800;font-size:18px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";font-size:24px;line-height:1;color:var(--accent)}
details[open] summary:after{content:"–"}
details p{margin:10px 0 0;color:var(--soft)}

/* cta */
.cta{text-align:center;background:var(--y);border-radius:32px;padding:56px 24px}
.cta h2{margin-bottom:10px}
.cta p{font-size:18px;color:var(--soft);max-width:620px;margin:0 auto 26px}
.cta .row{justify-content:center}

footer{background:var(--ink);color:#C9CFDA;font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:28px;padding-bottom:28px}
footer a{color:#C9CFDA}
[hidden]{display:none!important}
@media (max-width:560px){nav .btn.sm{display:none}.brand{font-size:18px}.top .wrap{gap:10px}}
.flinks{display:flex;gap:16px;flex-wrap:wrap}
.phone img{width:100%;height:auto}
button.btn{font:inherit;font-weight:700;cursor:pointer}
.linkbtn{font:inherit;background:none;border:0;padding:0;color:inherit;text-decoration:underline;cursor:pointer}
.contact{border:0;border-radius:24px;padding:0;width:min(520px,calc(100% - 32px));max-height:calc(100% - 32px);box-shadow:0 30px 60px -20px rgba(0,0,0,.4)}
.contact::backdrop{background:rgba(30,36,48,.6)}
.contact form{padding:26px;display:flex;flex-direction:column;gap:14px}
.c-head{display:flex;justify-content:space-between;align-items:center;gap:12px}
.c-head h2{font-size:26px;margin:0}
.c-x{border:0;background:#F1ECDD;width:38px;height:38px;border-radius:50%;font-size:24px;line-height:1;cursor:pointer;flex-shrink:0}
.c-p{margin:0;color:var(--soft)}
.contact label{display:flex;flex-direction:column;gap:6px;font-weight:700;font-size:15px}
.contact input,.contact textarea{font:inherit;padding:12px 14px;border:2px solid #D9D2BE;border-radius:12px;background:#fff;resize:vertical}
.contact input:focus,.contact textarea:focus{outline:3px solid #FFD90088;border-color:var(--ink)}
.contact .btn{align-self:flex-start}
.c-status{margin:0;font-weight:700}
.c-status.ok{color:#2F7D1E}.c-status.err{color:#B42318}
.c-alt{margin:0;font-size:14px;color:var(--muted)}