/* WinTok Studio — bố cục kiểu namstudio.vn, MÀU theo logo WinTok (đen + trắng, Peter 05/09):
   nền đen, chữ trắng, điểm nhấn = khối trắng chữ đen như chữ "WIN" trong logo; không màu thứ ba
   ngoài màu trạng thái (xanh lá = ok, đỏ = lỗi). Tự viết toàn bộ. */
:root{
  --bg:#0a0a0a;--bg-2:#121212;--fg:#f6f6f6;--fg-2:#b9b9b9;--fg-3:#8a8a8a;
  --acc:#ffffff;--acc-2:#e4e4e4;--hl:#ffffff;--ok:#4be38a;--err:#ff5470;
  --frost:rgba(255,255,255,.045);--frost-2:rgba(255,255,255,.075);--line:rgba(255,255,255,.11);--line-2:rgba(255,255,255,.2);
  --shadow:0 24px 60px -24px rgba(0,0,0,.75);--r:14px;--r-lg:22px;
  --g1:#2b2b2b;--g2:#161616;--g3:#0e0e0e;
}
*{box-sizing:border-box}
html{color-scheme:dark;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.6 Inter,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:inherit;text-decoration:none}
img{max-width:100%}
::selection{background:#fff;color:#000}

/* ── header ── */
.top{position:sticky;top:0;z-index:20;background:rgba(10,10,10,.8);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.top .in{max-width:1180px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em}
.brand img{height:26px;width:auto;display:block}
.top nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.top nav a{padding:8px 12px;border-radius:9px;color:var(--fg-2);font-weight:500;font-size:14px}
.top nav a:hover,.top nav a.on{color:var(--fg);background:var(--frost-2)}
.top nav .cta{border:1px solid var(--line-2);color:var(--fg);background:transparent}
.top nav .cta:hover{background:var(--frost-2)}
.top nav .dl{background:#fff;color:#000;font-weight:700;border:1px solid #fff}
.top nav .dl:hover{background:#e6e6e6;color:#000}
@media (max-width:720px){.top nav a:not(.dl):not(#nav-user){display:none}}

/* ── nút ── */
.btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer;border:1px solid var(--line-2);background:var(--frost-2);color:var(--fg);border-radius:12px;padding:12px 20px;font:inherit;font-weight:600;font-size:15px;transition:transform .12s,filter .15s,background .15s;white-space:nowrap}
.btn:hover{filter:brightness(1.15)}
.btn:active{transform:scale(.98)}
.btn.white{background:#fff;color:#0a0a0a;border-color:transparent}
.btn.white:hover{background:#e9e9e9;filter:none}
.btn.rose{background:#0a0a0a;color:#fff;border:1px solid #fff}
.btn.rose:hover{background:#1c1c1c;filter:none}
.btn.sm{padding:8px 14px;font-size:13.5px;border-radius:10px}
.btn.ico{width:42px;height:42px;padding:0;justify-content:center;border-radius:11px}
.btn:disabled{opacity:.55;cursor:wait}
.btn .ar{transition:transform .15s}
.btn:hover .ar{transform:translateX(3px)}
.btn .sub{font-weight:500;color:var(--fg-3);font-size:12.5px}
.btn.white .sub{color:#555}

/* ── hero ── */
.hero{position:relative;overflow:hidden;background:radial-gradient(900px 520px at 12% 8%,var(--g1) 0%,var(--g2) 45%,var(--g3) 78%,var(--bg) 100%)}
.hero::before{content:"";position:absolute;inset:0;opacity:.12;pointer-events:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23g)' opacity='.9'/%3E%3C/svg%3E")}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:140px;background:linear-gradient(180deg,transparent,var(--bg));pointer-events:none}
.hero .in{position:relative;max-width:1180px;margin:0 auto;padding:84px 20px 110px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid var(--line-2);font-size:13px;color:var(--fg-2);font-weight:500}
.badge svg{width:14px;height:14px;color:#fff}
h1{font-size:clamp(36px,5.6vw,66px);line-height:1.08;letter-spacing:-.025em;font-weight:800;margin:22px 0 18px}
h1 .hl{background:#fff;color:#000;padding:0 .16em;border-radius:.12em;display:inline-block;line-height:1.02}
.hero p.lead{font-size:17.5px;color:var(--fg-2);max-width:560px;margin:0 0 30px;line-height:1.65}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px}
.stage{position:relative;aspect-ratio:9/13;max-width:360px;margin:0 auto;border-radius:30px;background:linear-gradient(160deg,#1f1f1f,#0b0b0b);border:1px solid var(--line-2);box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.14);overflow:hidden}
.stage .bar{position:absolute;top:14px;left:14px;right:14px;display:flex;align-items:center;gap:8px;font-size:12px;color:var(--fg-2)}
.stage .live{background:#fff;color:#000;font-weight:800;font-size:11px;padding:2px 7px;border-radius:6px;letter-spacing:.06em}
.stage .who{display:flex;align-items:center;gap:8px;margin-left:auto}
.stage .who i{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,#fff,#7a7a7a);display:block}
.stage .glow{position:absolute;inset:auto -30% -20% -30%;height:70%;background:radial-gradient(closest-side,rgba(255,255,255,.22),transparent 70%);filter:blur(10px)}
.stage .chip{position:absolute;display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:12px;background:rgba(12,12,12,.8);border:1px solid var(--line-2);backdrop-filter:blur(8px);font-size:13px;font-weight:600;animation:float 5s ease-in-out infinite}
.stage .chip b{color:#fff}
.stage .chip:nth-child(3){left:18px;top:34%;animation-delay:-1s}
.stage .chip:nth-child(4){right:18px;top:48%;animation-delay:-2.6s}
.stage .chip:nth-child(5){left:34px;top:64%;animation-delay:-4s}
.stage .logo{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);width:62%;opacity:.95;filter:drop-shadow(0 10px 30px rgba(255,255,255,.25))}
.stage .foot{position:absolute;left:14px;right:14px;bottom:14px;display:flex;gap:6px}
.stage .foot span{flex:1;height:6px;border-radius:3px;background:rgba(255,255,255,.14)}
.stage .foot span:first-child{background:#fff}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@media (max-width:900px){.hero .in{grid-template-columns:1fr;padding:56px 20px 80px}.stage{display:none}}

/* ── khối chung ── */
section.blk{max-width:1180px;margin:0 auto;padding:64px 20px}
.kicker{font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--fg-2);font-weight:700}
h2{font-size:clamp(26px,3.4vw,40px);letter-spacing:-.02em;line-height:1.12;margin:10px 0 10px;font-weight:800}
.sub{color:var(--fg-2);max-width:640px;margin:0 0 30px;font-size:16px}
.grid{display:grid;gap:16px}
.g4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{position:relative;background:var(--frost);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;box-shadow:inset 0 1px 0 rgba(255,255,255,.08);transition:transform .18s,border-color .18s,background .18s}
.card:hover{transform:translateY(-3px);border-color:var(--line-2);background:var(--frost-2)}
.card .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:#fff;color:#000;margin-bottom:14px}
.card .ic svg{width:22px;height:22px}
.card h3{margin:0 0 6px;font-size:17px;letter-spacing:-.01em}
.card p{margin:0;color:var(--fg-2);font-size:14.5px}

/* ── kho ── */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px}
.tabs button{cursor:pointer;font:inherit;font-weight:600;font-size:13.5px;padding:8px 14px;border-radius:999px;border:1px solid var(--line-2);background:transparent;color:var(--fg-2)}
.tabs button.on{background:#fff;color:#0a0a0a;border-color:transparent}
.tabs .sp{flex:1}
.tabs input{background:var(--frost);border:1px solid var(--line-2);color:var(--fg);border-radius:999px;padding:8px 14px;font:inherit;min-width:220px}
.tabs input:focus{outline:2px solid #fff;border-color:transparent}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.prod{display:flex;flex-direction:column;background:var(--frost);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;transition:transform .18s,border-color .18s}
.prod:hover{transform:translateY(-3px);border-color:var(--line-2)}
.prod .thumb{aspect-ratio:4/3;background:radial-gradient(120% 90% at 30% 20%,#2a2a2a,#0e0e0e 70%);display:grid;place-items:center;position:relative}
.prod .thumb img{width:100%;height:100%;object-fit:cover}
.prod .thumb .fx{font-size:44px;filter:drop-shadow(0 10px 20px rgba(255,255,255,.25))}
.prod .tagtop{position:absolute;left:12px;top:12px;font-size:10.5px;letter-spacing:.12em;font-weight:800;text-transform:uppercase;color:#000;background:#fff;padding:4px 8px;border-radius:6px}
.prod .body{padding:16px 16px 14px;display:flex;flex-direction:column;gap:6px;flex:1}
.prod .ten{font-weight:800;font-size:16px;text-transform:uppercase;letter-spacing:.01em}
.prod .phu{color:var(--fg-3);font-size:12.5px}
.prod .row{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:10px}
.prod .gia{font-weight:800;font-size:17px}
.prod .gia.free{color:var(--ok)}
.empty{text-align:center;padding:48px 20px;border:1px dashed var(--line-2);border-radius:var(--r-lg);color:var(--fg-2)}
.center{text-align:center;margin-top:26px}

/* ── các bước ── */
.steps{counter-reset:s;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));padding:0;list-style:none;margin:0}
.steps li{counter-increment:s;background:var(--frost);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 22px 22px 66px;position:relative;color:var(--fg-2)}
.steps li b{color:var(--fg);display:block;margin-bottom:4px;font-size:16px}
.steps li::before{content:counter(s);position:absolute;left:20px;top:20px;width:32px;height:32px;border-radius:10px;background:#fff;color:#0a0a0a;font-weight:800;display:grid;place-items:center}

/* ── tải app ── */
.dlbox{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center;background:var(--frost);border:1px solid var(--line);border-radius:28px;padding:34px 30px}
.dlbox .req{color:var(--fg-2);font-size:14px;margin:0}
.dlbox .req b{color:var(--fg)}
.dlbox .act{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
@media (max-width:760px){.dlbox{grid-template-columns:1fr}}

/* ── hỗ trợ + CTA cuối ── */
.support{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.support .card{display:flex;align-items:center;gap:14px}
.support .card .ic{margin:0}
.cta-end{margin:30px auto 70px;max-width:1180px;padding:0 20px}
.cta-end .in{position:relative;overflow:hidden;border-radius:28px;padding:56px 28px;text-align:center;background:radial-gradient(700px 340px at 50% 0%,#2a2a2a,#141414 60%,#0c0c0c);border:1px solid var(--line-2)}
.cta-end h2{margin-top:0}
footer{border-top:1px solid var(--line);color:var(--fg-3);font-size:13px}
footer .in{max-width:1180px;margin:0 auto;padding:26px 20px;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
footer .in span{margin-left:auto}

/* ── trang con: form, hộp ── */
main.page{max-width:1080px;margin:0 auto;padding:40px 20px 70px}
.page h1{font-size:clamp(28px,4vw,44px);margin:6px 0 8px}
.form{max-width:440px;background:var(--frost);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}
label{display:block;font-size:12.5px;color:var(--fg-2);margin:12px 0 5px;font-weight:500}
input,select,textarea{width:100%;background:rgba(0,0,0,.4);border:1px solid var(--line-2);color:var(--fg);border-radius:11px;padding:11px 13px;font:inherit}
input:focus,textarea:focus{outline:2px solid #fff;border-color:transparent}
.ftabs{display:flex;gap:6px;flex-wrap:wrap;margin:16px 0 18px}
.ftabs button{cursor:pointer;font:inherit;font-weight:600;font-size:13.5px;padding:8px 13px;border-radius:999px;border:1px solid var(--line-2);background:transparent;color:var(--fg-2)}
.ftabs button.on{background:#fff;color:#0a0a0a;border-color:transparent}
.hint{color:var(--fg-2);font-size:13.5px}
.box{background:var(--frost);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px 22px;margin-top:14px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.tag{display:inline-block;background:rgba(255,255,255,.06);border:1px solid var(--line);border-radius:999px;padding:2px 10px;font-size:12.5px;color:var(--fg-2);margin:2px 6px 2px 0}
code{background:rgba(0,0,0,.45);border:1px solid var(--line);padding:2px 7px;border-radius:7px;font-size:12.5px;word-break:break-all}
.toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);background:#161616;border:1px solid var(--line-2);padding:11px 16px;border-radius:12px;box-shadow:var(--shadow);display:none;max-width:90vw;z-index:30;font-size:14px}
.toast.err{border-color:var(--err)}
.toast.ok{border-color:var(--ok)}
.free{color:var(--ok);font-weight:800}
.price b{color:var(--fg)}
a.lnk{color:#fff;text-decoration:underline;text-underline-offset:3px}
@media (max-width:560px){section.blk{padding:44px 16px}main.page{padding:26px 16px 60px}}