.sdd-container { max-width: 900px; margin: 30px auto; padding: 18px; background:#fff; border:1px solid #eaeaea; border-radius:12px; }
.sdd-container h2 { margin-top:0; }
.sdd-step label { display:block; margin:10px 0; }
.sdd-step input, .sdd-step select { width:100%; padding:10px; border:1px solid #d7d7d7; border-radius:8px; }
.sdd-nav { display:flex; gap:10px; justify-content:space-between; margin-top:10px; }
.sdd-prev, .sdd-next, .sdd-submit { background:#ff7a00; color:#fff; border:0; border-radius:28px; padding:10px 18px; cursor:pointer; }
.sdd-prev:hover, .sdd-next:hover, .sdd-submit:hover { background:#e86e00; }
.sdd-note { font-size:12px; color:#666; margin-top:6px; }
#sdd-result { margin-top:16px; padding:12px; background:#f8f9ff; border:1px dashed #ccd3ff; border-radius:10px; }
#sdd-total { font-size:24px; }