body{font-family:Inter,Arial;background:#f7f7f7;margin:0}
.wrapper{max-width:700px;margin:80px auto;padding:20px}
h1{font-size:32px;margin-bottom:10px}
.card{background:#fff;padding:30px;border-radius:12px;box-shadow:0 10px 30px rgba(0,0,0,.1)}
input,button{width:100%;padding:12px;margin:8px 0;border-radius:8px;border:1px solid #ddd}
button{background:#111;color:#fff;font-size:16px;border:none;cursor:pointer}
.toggle{display:flex;gap:20px;margin-bottom:15px}
.hidden{display:none}