:root{--navy:#12355b;--blue:#1769aa;--red:#e33131;--green:#168a4a;--ink:#17212b;--muted:#637387;--bg:#f4f8fc;--line:#dae5ef;--card:#fff;--soft:#eef6ff;--shadow:0 12px 30px rgba(18,53,91,.09)}
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var(--line)}.tab{flex:1;border:0;background:transparent;padding:14px;font-size:15px;font-weight:850;color:#536b82;cursor:pointer}.tab.active{background:#fff;color:var(--navy);box-shadow:inset 0 -3px var(--blue)}.panel{display:none;padding:20px}.panel.active{display:block}.panel-head{display:flex;align-items:flex-start;justify-content:space-between;gap:15px;margin-bottom:14px}.panel h2{margin:0;color:var(--navy);font-size:24px}.panel-head p{margin:2px 0 0;color:var(--muted);font-size:13px}.step{background:#e7f3ff;color:#0d5e9f;border-radius:999px;padding:5px 9px;font-size:11px;font-weight:900}.dropzone{display:flex;min-height:105px;border:2px dashed #a9c9e8;border-radius:15px;background:#f8fbff;align-items:center;justify-content:center;flex-direction:column;text-align:center;cursor:pointer;padding:18px}.dropzone:hover{border-color:var(--blue);background:#f2f8ff}.dropzone strong{font-size:16px;color:var(--navy)}.dropzone span{font-size:12px;color:var(--muted);margin-top:3px}.dropzone 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6px;font-size:14px}.piece{align-items:flex-start}.footer-row{flex-direction:column}}