:root{--bg:#f1f5f9;--card:#fff;--text:#0f172a;--muted:#64748b;--primary:#2563eb;--shadow:0 10px 25px rgba(2,6,23,.12)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--text)}
#backdrop{position:fixed;inset:0;background:rgba(2,6,23,.35);}
main.card{width:min(560px,92vw);background:var(--card);border-radius:16px;padding:28px;box-shadow:var(--shadow);position:relative;margin:12vh auto;text-align:center}
h1{margin:6px 0 8px;font-size:32px}
p{margin:0 0 18px;color:var(--muted)}
button{cursor:pointer;border:0;border-radius:10px;font-weight:700}
.primary{background:var(--primary);color:#fff;padding:14px 22px}
.ghost{background:#e2e8f0;color:#0f172a;padding:10px 16px}
.toast{position:absolute;left:50%;transform:translateX(-50%);bottom:-50px;background:#111827;color:#fff;padding:8px 12px;border-radius:8px;font-size:14px;box-shadow:var(--shadow)}
.modal{position:fixed;inset:0;display:grid;place-items:center;background:rgba(0,0,0,.45);padding:16px;visibility:hidden;opacity:0;transition:opacity .2s ease,visibility .2s ease}
.modal[open]{visibility:visible;opacity:1}
.modal-content{width:min(420px,94vw);background:#fff;border-radius:14px;padding:22px;box-shadow:var(--shadow);text-align:left}
.steps{margin:8px 0 14px 22px}.steps li{margin:6px 0}