:root{--bg:#f3f5f7;--card:#fff;--text:#17191d;--muted:#687080;--line:#dfe3e8;--accent:#f2b705;--danger:#a61b1b}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--bg);color:var(--text)}
main{max-width:1100px;margin:auto;padding:24px}.narrow{max-width:520px;padding-top:7vh}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;margin-bottom:18px}
h1,h2{margin-top:0}p{line-height:1.5}.muted{color:var(--muted)}
label{display:block;font-weight:700;margin:14px 0}input,select{display:block;width:100%;margin-top:6px;padding:12px;border:1px solid #cbd1d8;border-radius:10px;font:inherit}
button{border:0;border-radius:10px;padding:12px 16px;background:#111;color:#fff;font-weight:800;font:inherit}button:disabled{opacity:.45}
.tabs{display:flex;gap:6px;background:#e8ebef;padding:4px;border-radius:12px;margin:18px 0}.tab{flex:1;background:transparent;color:#111}.tab.active{background:#fff}
.hidden{display:none}.alert{padding:12px;border-radius:10px}.error{background:#fff0ef;color:var(--danger)}.success{background:#edf9f1;color:#116a35}
header{background:#111;color:#fff;padding:14px 22px;display:flex;gap:18px;align-items:center}header span{margin-left:auto}header a{color:#fff}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.hero{margin-top:18px}
@media(max-width:650px){.grid{grid-template-columns:1fr}main{padding:14px}}