.psu-wrap{max-width:680px;margin:20px auto;padding:10px}
.psu-card{background:#fff;border:1px solid #eee;border-radius:16px;padding:20px;box-shadow:0 2px 10px rgba(0,0,0,0.04)}
.psu-card h3{margin-top:0}
.psu-card form{display:flex;flex-direction:column;gap:10px}
.psu-card input,.psu-card button{padding:10px;border-radius:8px;border:1px solid #ddd}
.psu-card button{cursor:pointer}
.psu-hidden{display:none}