:root{font-family:Segoe UI,system-ui,-apple-system,BlinkMacSystemFont,Helvetica Neue,sans-serif;color:#0f172a;background-color:#f8fafc}*{box-sizing:border-box}body{margin:0;min-height:100vh}.app{max-width:960px;margin:0 auto;padding:2rem 1rem 3rem}h1{font-size:2rem;margin-bottom:1.25rem}.card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 8px 24px #0f172a14;margin-bottom:1.5rem}button{cursor:pointer;background:#2563eb;color:#fff;border:none;padding:.75rem 1.25rem;border-radius:8px;font-size:1rem}button:disabled{opacity:.6;cursor:not-allowed}.history-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}.history-item{border:1px solid #e2e8f0;border-radius:10px;padding:.75rem;background:#fdfdfd}.history-item header{margin-bottom:.5rem}.history-item small{color:#475569}.svg-preview{max-width:300px;max-height:300px;overflow:auto;border:1px dashed #cbd5f5;border-radius:6px;padding:.25rem;background:#f8fafc}.svg-preview svg{max-width:300px;max-height:300px;width:100%;height:auto;display:block}.download-link{display:inline-block;margin-top:.5rem;color:#2563eb;font-weight:600;text-decoration:none}.download-link:hover{text-decoration:underline}.danger-button{background:#dc2626;margin-top:.5rem}.danger-button:disabled{opacity:.7}