:root{color-scheme:dark;--bg: #0a0a0a;--panel: #131313;--border: #242424;--text: #f2f2f2;--muted: #8a8a8a;--accent: #4ecdc4;--danger: #ff6b6b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}code{font-family:ui-monospace,monospace;font-size:.9em;background:#1e1e1e;padding:1px 5px;border-radius:4px}a{color:var(--accent)}.centered{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px 20px}.panel{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:32px;width:100%;max-width:420px;display:flex;flex-direction:column;gap:16px}.panel.wide{max-width:720px}h1{font-size:1.5rem}h2{font-size:1.15rem}.muted{color:var(--muted);font-size:.9rem}.hint{color:var(--muted);font-size:.85rem}.error{color:var(--danger);font-size:.9rem}label{display:flex;flex-direction:column;gap:6px;font-size:.85rem;color:var(--muted)}input{background:#0d0d0d;border:1px solid var(--border);border-radius:8px;padding:11px 12px;color:var(--text);font-size:.95rem;font-family:inherit}input:focus{outline:2px solid var(--accent);outline-offset:-1px}button{background:#1e1e1e;border:1px solid var(--border);border-radius:8px;padding:9px 16px;color:var(--text);font-size:.9rem;font-family:inherit;cursor:pointer}button:hover:not(:disabled){border-color:#3a3a3a}button.primary{background:var(--accent);border-color:var(--accent);color:#000;font-weight:700;padding:13px 16px;font-size:1rem}button:disabled{opacity:.5;cursor:not-allowed}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:14px;padding:14px 22px;border-bottom:1px solid var(--border)}.spacer{flex:1}.content{padding:28px 22px;display:flex;justify-content:center}.checklist{list-style:none;display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:.9rem}.checklist li:before{content:"○ ";color:#4a4a4a}