:root{--text:#0c1014;--muted:#737373;--line:#dbdbdb;--bg:#ffffff;--tile:#efefef;--accent:#0095f6;--brand:#1f2a44}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.4;-webkit-font-smoothing:antialiased}a{color:inherit}button{font:inherit}.site{max-width:640px;margin:0 auto;padding:48px 16px}.site h1{font-size:28px;margin:0 0 8px}.site p{color:#444;font-size:16px}.btn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:12px 18px;font-size:15px;font-weight:600;text-decoration:none;cursor:pointer}.btn.secondary{background:#f2f2f2;color:var(--text)}.card{border:1px solid var(--line);border-radius:12px;padding:16px;margin:12px 0}.card h3{margin:0 0 8px;font-size:16px}.copyrow{display:flex;gap:8px}.copyrow input{flex:1 1;min-width:0;padding:10px;border:1px solid var(--line);border-radius:8px;font-family:ui-monospace,Menlo,monospace;font-size:12px;background:#fafafa}.note{background:#eef5ff;font-size:14px}.error,.note{border-radius:10px;padding:12px 14px}.error{background:#fdecec}.footer{margin-top:48px;color:var(--muted);font-size:12px}.hint{border:1px solid var(--line);border-radius:12px;padding:16px;margin:24px 0;background:#fff}.hint h3{margin:0 0 10px;font-size:16px}.hint-row{display:flex;gap:16px;align-items:flex-start}.hint-row ol{flex:1 1;margin:0;padding-left:20px;font-size:15px;line-height:1.5}.hint-row ol li{margin-bottom:8px}.hint-row img{width:200px;border-radius:8px;border:1px solid var(--line);flex-shrink:0}.hint-warn{margin:10px 0 0;font-size:13px;color:#8a4b00}@media (max-width:560px){.hint-row{flex-direction:column}.hint-row img{width:100%}}