.container{max-width:960px;margin:24px auto 64px;padding:0 18px;}
    .card{background:#fff;border:1px solid var(--line,#e6e6e6);border-radius:12px;box-shadow:var(--shadow-sm,0 1px 2px rgba(0,0,0,.06));padding:clamp(20px,3vw,32px);}
    h1{margin:0 0 8px;font:800 clamp(22px,3vw,28px)/1.2 Inter,system-ui,Arial;}
    p.lead{margin:0 0 16px;color:#555}
    form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    form .row .full{grid-column:1/-1}
    label{display:block;font-weight:600;margin:10px 0 6px}
    input{width:100%;padding:12px 14px;border:1px solid #dadce0;border-radius:10px;font-size:16px}
    small.err{display:block;margin-top:6px;color:#b00020;font-weight:600}
    .alert{border-radius:10px;padding:12px 14px;margin:8px 0 16px}
    .alert.error{background:#ffe8e8;border:1px solid #ffb3b3;color:#8b0000}
    .actions{display:flex;gap:12px;align-items:center;margin-top:18px}
    .help{font-size:14px;color:#6b7280;margin-top:8px}
    .btn{display:inline-block;padding:12px 22px;border-radius:10px;text-decoration:none;font-weight:600}
    .btn.primary{background:#111;color:#fff}
    .btn.secondary{background:#f5f6f8;color:#111;border:1px solid #e0e2e5}
    .btn.primary:hover{background:#222}
    .btn.secondary:hover{background:#ebedf0}