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srgb,var(--box-color)86%,white)}}.step-box{border:2px solid #0f172a14;place-items:center;padding:6px;display:grid}.step-box.small{width:62px;height:44px}.step-box-text{color:#0f172a;text-transform:lowercase;background:#ffffffbf;border-radius:8px;padding:2px 6px;font-size:.65rem;font-weight:700}.copy-row{justify-content:center;align-items:center;gap:10px;display:flex}.copy-arrow{color:var(--muted);font-size:1rem;font-weight:700}.reveal-mark{color:#0f172a;background:#fff;border-radius:999px;place-items:center;width:28px;height:28px;font-size:1.05rem;font-weight:800;display:grid}.step-label{color:var(--muted);font-size:.85rem;line-height:1.3}.step-card.has-hint{cursor:help}.step-tooltip{color:#e2e8f0;opacity:0;pointer-events:none;z-index:10;background:#0f172a;border:1px solid #94a3b84d;border-radius:10px;min-width:160px;max-width:200px;padding:8px 10px;font-size:.8rem;transition:opacity .18s,transform .18s;position:absolute;bottom:10px;left:50%;transform:translate(-50%,6px);box-shadow:0 10px 20px #0f172a40}.step-tooltip pre{white-space:pre-wrap;font-family:var(--font-code),"Fira Code",ui-monospace,monospace;margin:0;line-height:1.3}.step-tooltip code{font-family:inherit}.step-card:hover .step-tooltip{opacity:1;transform:translate(-50%)}.editor-area{grid-template-columns:minmax(0,2fr) minmax(0,1fr);align-items:start;gap:16px;min-height:0;display:grid}.editor-area>*{min-width:0}.editor-panel{flex-direction:column;gap:12px;min-height:0;display:flex}.editor-hint{color:var(--muted);margin:0;font-size:.9rem}.editor-header{justify-content:space-between;align-items:center;gap:12px;display:flex}.editor-header h2{font-size:1.2rem}.editor-actions{flex-wrap:wrap;gap:8px;display:flex}.editor-frame{--editor-min-h:220px;min-height:var(--editor-min-h);background:#f8fafc;border:2px solid #cbd5f5;border-radius:14px;overflow:hidden}.editor-frame .cm-editor,.editor-frame .cm-scroller{min-height:var(--editor-min-h)}.cm-gutters{background:#f8fafc;border-right:1px solid #e2e8f0}.cm-lineNumbers .cm-gutterElement{color:#94a3b8;font-size:.85rem}.editor-shell{height:100%}.btn{cursor:pointer;border:none;border-radius:12px;padding:10px 16px;font-size:.95rem;font-weight:700}.btn.sm{border-radius:999px;padding:6px 10px;font-size:.85rem}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--accent-strong);color:#fff}.btn.ghost{border:2px solid var(--accent-strong);color:var(--accent-strong);background:#fff}.btn.danger{color:#be123c;background:#fff1f2;border:2px solid #fb7185}.btn.danger:hover{background:#ffe4e6}.btn:focus-visible{outline-offset:2px;outline:3px solid #0ea5a566}.modal-backdrop{z-index:50;background:#0f172a73;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.modal{border:2px solid var(--panel-border);background:#fff;border-radius:18px;gap:10px;width:min(520px,100%);padding:16px;display:grid;box-shadow:0 30px 60px #0f172a38}.modal p{color:var(--muted);line-height:1.4}.modal-actions{flex-wrap:wrap;justify-content:flex-end;gap:10px;display:flex}.result{gap:10px;display:grid}.result h3{font-size:1.1rem}.result.idle{color:var(--muted);border-style:dashed}.result.error{background:#fff1f2;border-color:#fecaca}.result.success{background:#f0fdf4;border-color:#bbf7d0}.error-list{color:#991b1b;margin:0;padding-left:18px}.error-list li{justify-content:space-between;gap:12px;margin-bottom:6px;font-size:.95rem;display:flex}.error-list em{color:#7f1d1d;font-style:normal}.result-boxes{flex-wrap:wrap;gap:10px;display:flex}.result-chip{background:#fff;border:1px solid #d1fae5;border-radius:12px;gap:4px;min-width:120px;padding:8px 12px;display:grid}.result-chip span{text-transform:uppercase;color:var(--muted);letter-spacing:.08em;font-size:.7rem}.result-chip strong{font-size:1rem}@media (max-width:760px){.workspace,.editor-area{grid-template-columns:1fr}.challenge-title{flex-direction:column;align-items:flex-start}.editor-frame{--editor-min-h:200px}}@media (max-width:640px){.app{gap:12px;padding:14px}.panel{padding:14px}.editor-header{flex-direction:column;align-items:flex-start}.editor-actions{width:100%}.btn{flex:auto}.step-card{flex-basis:200px}}