:root{--bg:#0a0d07;--surface:#11150d;--lime:#c4f02a;--ink:#0a0c07;--paper:#eef2e3;--muted:#8e9879;--border:rgba(196,240,42,.14)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--paper);font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.66;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--lime);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:780px;margin:0 auto;padding:0 20px}
nav{border-bottom:1px solid var(--border);background:rgba(10,13,7,.82);position:sticky;top:0;backdrop-filter:blur(8px);z-index:10}
.navrow{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:9px;font-weight:900;font-size:18px;letter-spacing:-.4px;color:var(--paper)}
.mark{background:var(--lime);color:var(--ink);padding:3px 9px;border-radius:9px}
.back{color:var(--muted);font-size:14px;font-weight:600}
.back:hover{color:var(--paper);text-decoration:none}
main{padding:44px 0 10px}
h1{font-size:clamp(28px,5vw,40px);font-weight:900;letter-spacing:-1px;margin:0 0 6px;line-height:1.1}
.updated{color:var(--muted);font-size:13px;margin-bottom:26px}
.lead{font-size:16px;color:#d4ddc6;margin:0 0 8px}
h2{font-size:19.5px;font-weight:800;letter-spacing:-.3px;margin:34px 0 10px;color:var(--paper)}
p,li{color:#c3ccb2;font-size:15px}
p{margin:0 0 14px}
ul{margin:0 0 14px;padding-left:22px}
li{margin:7px 0}
strong{color:var(--paper);font-weight:700}
.box{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 20px;margin:18px 0}
.box p:last-child{margin-bottom:0}
.steps{counter-reset:s;list-style:none;padding:0;margin:18px 0}
.steps li{position:relative;padding:14px 16px 14px 56px;background:var(--surface);border:1px solid var(--border);border-radius:14px;margin:10px 0;color:var(--paper);font-size:15px}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:14px;top:50%;transform:translateY(-50%);width:28px;height:28px;border-radius:50%;background:var(--lime);color:var(--ink);font-weight:900;display:flex;align-items:center;justify-content:center;font-size:14px}
/* header premium (áp cho nav legal) */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:40;background:linear-gradient(90deg,#a9d41f,var(--lime));box-shadow:0 0 10px rgba(196,240,42,.55);transition:width .08s linear}
nav{transition:background .3s,box-shadow .3s,border-color .3s}
nav.scrolled{background:rgba(10,13,7,.86);box-shadow:0 10px 30px rgba(0,0,0,.45);border-bottom-color:rgba(196,240,42,.24)}
.brand .mark{transition:transform .2s cubic-bezier(.2,.7,.2,1),box-shadow .2s}
.brand:hover .mark{transform:translateY(-1px);box-shadow:0 5px 16px rgba(196,240,42,.45)}
@keyframes sweep{to{left:160%}}

/* app store badge (cho footer CTA) */
.appstore{position:relative;overflow:hidden;display:inline-flex;align-items:center;gap:11px;background:#000;color:#fff;border:1px solid #2a2f24;border-radius:14px;padding:9px 16px;transition:transform .14s cubic-bezier(.2,.7,.2,1),border-color .2s}
.appstore:hover{transform:translateY(-2px);border-color:var(--lime)}
.appstore::after{content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.18),transparent);transform:skewX(-18deg)}
.appstore:hover::after{animation:sweep .8s cubic-bezier(.2,.7,.2,1)}
.appstore svg{width:24px;height:24px;fill:#fff}
.appstore .sm{font-size:11px;opacity:.82;line-height:1.1}
.appstore .lg{font-size:16px;font-weight:700;line-height:1.1}

/* footer premium */
footer{position:relative;margin-top:60px;color:var(--muted);font-size:13px;background:linear-gradient(180deg,transparent,rgba(196,240,42,.025))}
footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(196,240,42,.55),transparent)}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:30px;padding:52px 20px 36px}
.foot-brand .brand{font-size:19px;margin-bottom:14px}
.foot-tag{color:#9aa487;font-size:13px;line-height:1.65;max-width:36ch;margin:0 0 14px}
.foot-mail{color:var(--lime);font-weight:700}
.foot-col h5{color:var(--paper);font-size:11.5px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;margin:4px 0 14px}
.foot-col a{display:block;color:var(--muted);margin:10px 0;font-size:13.5px;width:fit-content;transition:color .2s,transform .2s cubic-bezier(.2,.7,.2,1)}
.foot-col a:hover{color:var(--paper);transform:translateX(3px);text-decoration:none}
.foot-cta .appstore{margin-bottom:11px}
.foot-free{display:block;color:var(--muted);font-size:11.5px}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;padding:20px;border-top:1px solid var(--border)}
.foot-ext{display:flex;gap:18px}
.foot-ext a:hover{color:var(--paper);text-decoration:none}
.foot-disc{font-size:11px;color:#6f785d;line-height:1.6;padding:16px 20px 32px;opacity:.85;max-width:none}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr;gap:28px 20px}.foot-brand{grid-column:1/-1}.foot-bottom{justify-content:center;text-align:center}}