.pso-app{max-width:600px;margin:auto;font-family:Arial}
.pso-top{display:flex;gap:20px;margin-bottom:20px}
.tab{opacity:.5;cursor:pointer}
.tab.active{opacity:1;font-weight:bold}
.pso-stepbar{background:#eef3ff;padding:12px;border-radius:10px;margin-bottom:20px}
.pso-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 5px 15px rgba(0,0,0,.08)}
.pso-grid{display:flex;gap:15px}
.pso-box{flex:1;border:1px solid #ddd;padding:20px;text-align:center;border-radius:10px;cursor:pointer}
.pso-box:hover{background:#f0f4ff}
.pso-result{margin-top:20px;font-size:18px}