:root{color-scheme:light dark;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Hiragino Sans,sans-serif}body{margin:0;padding:24px 16px;max-width:480px;margin-inline:auto;background:#f9fafb;color:#111827}@media (prefers-color-scheme: dark){body{background:#111827;color:#f3f4f6}input{background:#1f2937;color:#f3f4f6;border-color:#374151!important}}h1{font-size:1.25rem;margin-bottom:8px}p{line-height:1.6}.card{background:#7f7f7f14;border-radius:12px;padding:16px;margin-top:16px}.card.warning{background:#dc26261a;border:1px solid rgba(220,38,38,.3)}.card.warning p:first-child{margin-top:0}.card.warning p:last-child{margin-bottom:0}input[type=text]{width:100%;box-sizing:border-box;padding:10px 12px;border-radius:8px;border:1px solid #d1d5db;font-size:1rem;margin-top:8px}button{margin-top:12px;padding:10px 16px;border-radius:8px;border:none;background:#111827;color:#fff;font-size:1rem;cursor:pointer}@media (prefers-color-scheme: dark){button{background:#f3f4f6;color:#111827}}button:disabled{opacity:.5;cursor:default}.masked-key{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:1rem;letter-spacing:.02em;word-break:break-all;padding:10px 12px;border-radius:8px;border:1px solid #d1d5db;background:#7f7f7f14;margin-top:8px}@media (prefers-color-scheme: dark){.masked-key{border-color:#374151}}.status{margin-top:8px;font-size:.9rem}.status.success{color:#16a34a}.status.error{color:#dc2626}.result{display:flex;align-items:center;gap:12px}.result img{width:32px;height:32px;border-radius:6px}