:root{--bg:#EEF2F6;--panel:#fff;--ink:#12202F;--muted:#5B6B7C;--line:#D9E1E9;--blue:#0B4DA2;--blue2:#2F7BEA;--on:#fff;--amber:#FFB81C;--ok:#1B8A5A;--tint:#E3EDFB}
@media(prefers-color-scheme:dark){:root{--bg:#0E1620;--panel:#16212D;--ink:#EAF0F6;--muted:#93A4B5;--line:#26364A;--blue:#5B9BFF;--blue2:#2F7BEA;--on:#0E1620;--ok:#3ECF8E;--tint:#1B2C44}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;padding-bottom:84px}
a{color:var(--blue)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
/* top bar */
.top{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink);text-decoration:none}
.logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--blue2));display:grid;place-items:center;font-size:19px}
.top nav{display:none;gap:6px}
.top nav a{color:var(--muted);text-decoration:none;font-weight:600;padding:8px 14px;border-radius:999px}
.top nav a:hover,.top nav a.on{background:var(--tint);color:var(--blue)}
/* bottom tab bar (phones) */
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:10;display:flex;background:var(--panel);border-top:1px solid var(--line);padding:8px 8px calc(8px + env(safe-area-inset-bottom))}
.tabs a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;text-decoration:none;color:var(--muted);font-size:12px;font-weight:600;padding:4px 0;border-radius:12px}
.tabs a span{font-size:22px;line-height:1.1}
.tabs a.on{color:var(--blue)}
@media(min-width:700px){.top nav{display:flex}.tabs{display:none}body{padding-bottom:0}}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--amber);color:#12202F;font-weight:800;font-size:17px;padding:15px 26px;border-radius:16px;text-decoration:none;border:0;cursor:pointer;box-shadow:0 6px 16px rgba(255,184,28,.35);transition:transform .08s}
.btn:active{transform:scale(.97)}
.btn.blue{background:var(--blue);color:var(--on);box-shadow:0 6px 16px rgba(11,77,162,.3)}
.btn.ghost{background:var(--panel);color:var(--ink);box-shadow:none;border:1px solid var(--line)}
.btn.block{display:flex;width:100%}
/* hero */
.hero{background:linear-gradient(160deg,#0B4DA2 0%,#2F7BEA 70%,#4FA0FF 100%);color:#fff;border-radius:0 0 32px 32px;padding:46px 0 54px;overflow:hidden}
.hero .wrap{display:grid;gap:30px;align-items:center}
@media(min-width:760px){.hero .wrap{grid-template-columns:1.2fr 1fr}}
.hero h1{font-size:clamp(32px,6vw,46px);line-height:1.1;margin:0 0 14px;letter-spacing:-.5px}
.hero p{font-size:18px;opacity:.92;margin:0 0 24px}
.hero .row{display:flex;gap:12px;flex-wrap:wrap}
.hero .btn.ghost{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.35)}
/* phone mock */
.phone{width:240px;margin:0 auto;background:#0E1620;border-radius:34px;padding:10px;box-shadow:0 24px 50px rgba(0,0,0,.35);transform:rotate(3deg)}
.screen{background:#EEF2F6;border-radius:26px;padding:16px 14px 14px;color:#12202F;min-height:330px}
.screen h4{margin:0 0 10px;font-size:15px}
.pill{display:flex;justify-content:space-between;background:#fff;border-radius:14px;padding:10px 12px;margin-bottom:8px;font-size:13px;box-shadow:0 1px 0 #D9E1E9}
.pill b{color:#0B4DA2}
.total{background:linear-gradient(135deg,#0B4DA2,#2F7BEA);color:#fff;border-radius:16px;padding:14px;text-align:center;margin:12px 0 8px}
.total small{opacity:.85;display:block;font-size:12px}
.total strong{font-size:28px}
.mini{background:#FFB81C;color:#12202F;border-radius:12px;text-align:center;font-weight:800;padding:9px;font-size:14px}
/* sections */
section{padding:44px 0 6px}
h2{font-size:26px;margin:0 0 6px;letter-spacing:-.3px}
.sub{color:var(--muted);margin:0 0 22px}
.grid{display:grid;gap:14px}
@media(min-width:640px){.grid.three{grid-template-columns:repeat(3,1fr)}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:22px}
.ico{width:48px;height:48px;border-radius:15px;display:grid;place-items:center;font-size:24px;margin-bottom:12px}
.i1{background:#E3EDFB}.i2{background:#FFF1CC}.i3{background:#DDF4E8}
@media(prefers-color-scheme:dark){.i1{background:#1B2C44}.i2{background:#3a3115}.i3{background:#15352a}}
.card h3{margin:0 0 6px;font-size:18px}
.card p{margin:0;color:var(--muted)}
.steps{counter-reset:s;display:grid;gap:12px}
.steps div{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:16px 16px 16px 62px;position:relative}
.steps div:before{counter-increment:s;content:counter(s);position:absolute;left:16px;top:50%;transform:translateY(-50%);width:34px;height:34px;border-radius:50%;background:var(--blue);color:var(--on);font-weight:800;display:grid;place-items:center}
.cta{margin:40px 0 10px;background:linear-gradient(135deg,#FFB81C,#FFD36B);color:#12202F;border-radius:26px;padding:30px;text-align:center}
.cta h2{margin-bottom:6px}.cta p{margin:0 0 18px}
.cta .btn{background:#12202F;color:#fff;box-shadow:none}
/* text pages */
.page{padding:30px 0 10px}
.page h1{font-size:32px;margin:0 0 6px}
.page .doc{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:6px 24px 22px;margin-top:16px}
.page h2{font-size:19px;margin:26px 0 6px;color:var(--blue)}
.page .muted,.muted{color:var(--muted)}
.fill{background:#fff3b0;color:#3d3300;padding:0 4px;border-radius:4px}
/* join */
.code{font:800 36px/1.2 ui-monospace,Menlo,Consolas,monospace;letter-spacing:3px;text-align:center;margin:10px 0 20px;background:var(--tint);color:var(--blue);border-radius:18px;padding:18px 8px}
.stack{display:grid;gap:12px;max-width:420px;margin:0 auto}
footer{text-align:center;color:var(--muted);font-size:14px;padding:30px 20px 20px}
footer a{color:var(--muted)}