/* Kiều Đoan Yoga · bảng màu ngọc – kem – vàng, chữ Playfair Display + Be Vietnam Pro */
:root{--brand:#2a8577;--brand-ink:#1c5b52;--brand-soft:#e3f1ed;--la:#8fb996;--go:#9a6f48;--accent:#c49a3c;--accent-soft:#f6ecd2;--bg:#faf6ee;--bg2:#f1e9da;--card:#fff;--line:#e8dfcf;--ink:#2b2a26;--muted:#5e5a52;--ok:#3c7d4a;--warn:#9a6400;--bad:#B42318;--zalo:#0068FF}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:"Playfair Display",Georgia,serif;line-height:1.25;color:var(--brand-ink);text-wrap:balance;font-variant-numeric:lining-nums}
a{color:var(--brand)}img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:max(20px,env(safe-area-inset-right,0px))}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:10px 22px;border-radius:999px;border:2px solid var(--brand);background:var(--brand);color:#fff;font:inherit;font-weight:600;text-decoration:none;cursor:pointer;transition:.2s}
.btn:hover{background:var(--brand-ink);border-color:var(--brand-ink)}
.btn.ghost{background:#fff;color:var(--brand-ink)}.btn.ghost:hover{background:var(--brand-soft)}
.btn.gold{background:var(--accent);border-color:var(--accent);color:#fff}.btn.gold:hover{background:#a9842f;border-color:#a9842f}
.btn.zalo{background:var(--zalo);border-color:var(--zalo)}
.btn.sm{min-height:38px;padding:6px 16px;font-size:14px}
.btn.ok{background:var(--ok);border-color:var(--ok)}.btn.bad{background:#fff;color:var(--bad);border-color:#F1B8B2}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* nav */
.nav{position:sticky;top:0;z-index:40;background:rgba(250,246,238,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--bg2)}
.nav-in{display:flex;align-items:center;gap:16px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-img{width:46px;height:46px;border-radius:50%;object-fit:cover;border:2px solid var(--accent)}
.brand b{display:block;font-family:"Playfair Display",serif;font-size:20px;color:var(--brand-ink);line-height:1.1}.brand small{color:var(--muted);font-size:12px}
.menu{margin-left:auto;display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.menu>a{padding:8px 10px;border-radius:10px;text-decoration:none;color:var(--muted);font-weight:500;font-size:15px}.menu>a:hover{color:var(--brand);background:var(--brand-soft)}
.menu-act{display:flex;gap:8px;align-items:center;margin-left:8px}.who{font-size:14px;color:var(--muted);max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.burger{display:none;margin-left:auto;min-width:44px;min-height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:20px}
@media (max-width:980px){.burger{display:block}.menu{display:none;position:absolute;left:0;right:0;top:72px;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 16px 16px}
 .nav.open .menu{display:flex}.menu-act{margin:8px 0 0;flex-wrap:wrap}}

/* hero (trang con) */
.hero{background:linear-gradient(180deg,var(--bg) 0%,var(--brand-soft) 100%);border-bottom:1px solid var(--line)}
.hero-in{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.9fr);gap:40px;align-items:center;padding-block:56px}
.kicker{display:inline-block;color:var(--accent);font-weight:600;font-size:13px;letter-spacing:.12em;text-transform:uppercase}
.hero h1{font-size:clamp(32px,5vw,54px);margin:14px 0;color:var(--brand-ink)}
.hero p.lead{font-size:17px;color:var(--muted);max-width:60ch;margin:0 0 22px}
.row{display:flex;flex-wrap:wrap;gap:10px}
@media (max-width:900px){.hero-in{grid-template-columns:1fr;padding-block:36px;gap:30px}}

/* sections */
.sec{padding-block:64px}.sec.alt{background:#fff;border-block:1px solid var(--bg2)}
.sec h2{font-size:clamp(28px,3.6vw,40px);margin:0 0 8px}.sec .sub{color:var(--muted);margin:0 0 28px;max-width:70ch}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--bg2);border-radius:20px;padding:22px}
.card .em{font-size:30px}.card h3{font-size:20px;margin:8px 0 6px}.card p{margin:0;color:var(--muted)}
.stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.stat{flex:1 1 120px;background:#fff;border:1px solid var(--bg2);border-radius:14px;padding:12px;text-align:center}
.stat b{display:block;font-family:"Playfair Display",serif;font-size:26px;color:var(--brand)}.stat span{font-size:13px;color:var(--muted)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.steps .card{position:relative;padding-top:56px}.steps .card::before{counter-increment:s;content:counter(s);position:absolute;top:16px;left:22px;width:32px;height:32px;border-radius:50%;background:var(--brand);color:#fff;font-family:"Playfair Display",serif;font-weight:700;display:grid;place-items:center}

/* tabs & catalog */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.tabs button{font:inherit;font-weight:600;border:2px solid var(--brand);background:transparent;color:var(--brand-ink);border-radius:999px;padding:8px 18px;cursor:pointer}
.tabs button.on{background:var(--brand);border-color:var(--brand);color:#fff}
.items{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}
.item{background:#fff;border:1px solid var(--bg2);border-radius:20px;padding:20px;display:flex;flex-direction:column;gap:8px}
.item .top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.item .ic{font-size:30px}
.item h3{font-size:19px;margin:0}.item p{margin:0;color:var(--muted);font-size:14.5px;flex:1}
.item.lock{background:#fdfbf6;border-style:dashed}
.pill{display:inline-block;border-radius:999px;padding:3px 10px;font-size:12.5px;font-weight:600;white-space:nowrap}
.pill.ok{background:#e8f4e9;color:var(--ok)}.pill.warn{background:#FFF1D6;color:var(--warn)}.pill.bad{background:#FDE8E6;color:var(--bad)}.pill.mute{background:#f1ece2;color:var(--muted)}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.plan{position:relative;background:#fff;border:1px solid var(--bg2);border-radius:20px;padding:24px;text-align:left;display:flex;flex-direction:column;gap:6px}
.plan.hot{background:var(--brand-ink);border-color:var(--brand-ink);color:#fff}.plan.hot h3,.plan.hot .price{color:#fff}.plan.hot p{color:#d6ebe6}
.plan .tag{position:absolute;top:-12px;left:22px;background:var(--accent);color:#fff;font-weight:600;font-size:12.5px;border-radius:999px;padding:3px 12px}
.plan h3{margin:0 0 4px;font-size:21px}.plan .price{font-family:"Playfair Display",serif;font-size:28px;color:var(--brand);font-weight:700}.plan .price s{font-size:15px;color:var(--muted);font-family:"Be Vietnam Pro",sans-serif;font-weight:400;margin-left:6px}
.plan p{color:var(--muted);font-size:14px;margin:0 0 12px}.plan .btn{margin-top:auto;align-self:flex-start}
.plan.hot .btn{background:#fff;color:var(--brand-ink);border-color:#fff}
.bank{margin-top:18px;background:#fff;border:2px dashed var(--accent);border-radius:18px;padding:16px 20px}

/* faq */
details{background:#fff;border:1px solid var(--bg2);border-radius:16px;padding:14px 18px;margin-bottom:10px}summary{cursor:pointer;font-weight:600;color:var(--brand-ink)}
.cta-band{background:var(--brand-ink);color:#e7f2ef;border-radius:28px;padding:40px;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta-band h2{color:#fff;margin:0}.cta-band p{margin:6px 0 0;opacity:.9}

/* forms */
.auth{max-width:560px;margin:40px auto;padding-inline:16px}
.panel{background:#fff;border:1px solid var(--bg2);border-radius:24px;padding:28px}
.panel h1{font-size:30px;margin:0 0 6px}.panel .sub{color:var(--muted);margin:0 0 18px}
.f{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}.f label{font-weight:500;font-size:14.5px;color:var(--brand-ink)}.f small{color:var(--muted)}
input[type=text],input[type=email],input[type=tel],input[type=password],input[type=number],input[type=search],input[type=date],select,textarea{width:100%;font:inherit;font-size:15.5px;padding:11px 14px;border:1px solid #d9cfbd;border-radius:12px;background:var(--bg);color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(42,133,119,.14)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}@media (max-width:560px){.two{grid-template-columns:1fr}}
.chk{display:flex;gap:10px;align-items:flex-start;margin-bottom:12px}.chk input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand)}
.alert{border-radius:14px;padding:12px 16px;margin-bottom:14px;border:1px solid}
.alert.ok{background:#e8f4e9;border-color:#bfdcc4;color:#24502e}.alert.warn{background:#FFF6E0;border-color:#F3D48A;color:#6B4600}.alert.bad{background:#FDECEA;border-color:#F4B9B2;color:#7A1A12}
.muted{color:var(--muted)}.center{text-align:center}

/* app */
.page{padding-block:30px 60px}
.page-h{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;justify-content:space-between;margin-bottom:18px}.page-h h1{margin:0;font-size:32px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-bottom:18px}
.kpi{background:#fff;border:1px solid var(--bg2);border-radius:16px;padding:14px}.kpi span{display:block;font-size:13px;color:var(--muted)}.kpi b{font-size:20px}
.tw{overflow-x:auto;background:#fff;border:1px solid var(--bg2);border-radius:16px}
table{width:100%;border-collapse:collapse;font-size:14.5px}th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:var(--brand-soft);color:var(--brand-ink);font-weight:600;white-space:nowrap}td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tr:last-child td{border-bottom:0}
.inline{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.inline select,.inline input{width:auto;padding:6px 8px;font-size:14px}
.atabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:16px}.atabs a{text-decoration:none;padding:9px 16px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--ink);font-weight:600}
.atabs a.on{background:var(--brand);color:#fff;border-color:var(--brand)}.atabs .n{background:var(--accent);color:#fff;border-radius:999px;padding:0 8px;margin-left:6px;font-size:12.5px}
.searchbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}.searchbar input{flex:1 1 220px;width:auto}.searchbar select{width:auto}

/* viewer */
body.viewer-body{background:#fff}
.viewer{display:flex;flex-direction:column;height:100dvh}
.vbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:8px 12px;border-bottom:1px solid var(--line);background:#fff;min-height:56px}
.vbar b{font-size:14.5px}
.viewer iframe{flex:1;width:100%;border:0}

.foot{background:var(--brand-ink);color:#d6ebe6;margin-top:0}
.foot-in{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding-block:32px}.foot a{color:#e6c97a}.foot p{margin:4px 0}
.foot-brand{font-family:"Playfair Display",serif;font-size:24px;color:#fff;font-weight:600}.foot-slogan{font-family:"Playfair Display",serif;font-style:italic;color:#e6c97a}
.foot .copy{padding-block:12px calc(14px + env(safe-area-inset-bottom,0px));border-top:1px solid rgba(255,255,255,.14);font-size:13.5px;opacity:.8}
@media (max-width:700px){.foot-in{grid-template-columns:1fr}}
.zalo-fab{position:fixed;right:max(16px,env(safe-area-inset-right,0px));bottom:calc(16px + env(safe-area-inset-bottom,0px));z-index:50;display:flex;align-items:center;gap:6px;background:var(--zalo);color:#fff;text-decoration:none;font-weight:600;border-radius:999px;padding:12px 16px;box-shadow:0 10px 24px -8px rgba(0,104,255,.6)}
.feat{display:flex;flex-wrap:wrap;gap:14px;align-items:center;text-decoration:none;color:#fff;background:var(--brand-ink);border-radius:20px;padding:16px 20px;margin-bottom:18px}
.feat .fi{font-size:34px}.feat b{display:block;font-family:"Playfair Display",serif;font-size:19px}.feat small{opacity:.88}.feat>span:nth-child(2){flex:1 1 240px}
.feat .btn{background:var(--accent);border-color:var(--accent);color:#fff}
.perm{margin-bottom:16px}.perm summary{font-weight:700}.permg{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin-top:10px}.permg ul{margin:6px 0 0;padding-left:20px}.permg li{margin:3px 0;font-size:14.5px}

/* thư viện: tiêu đề nhóm, đề cương chuyên đề */
.lib-g{margin:26px 0 10px;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}.lib-g h2{font-size:24px;margin:0}.lib-g span{color:var(--muted);font-size:14px}
.topics{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 0;padding:0;list-style:none}.topics li{background:var(--brand-soft);color:var(--brand-ink);padding:6px 13px;border-radius:999px;font-size:13.5px;font-weight:500}

[hidden]{display:none!important}