:root{--bg: #f4f5f7;--card: #ffffff;--border: #e4e7ec;--text: #1a1d21;--muted: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--ok-bg: #ecfdf5;--ok-text: #047857;--err-bg: #fef2f2;--err-text: #b91c1c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.5}.page{max-width:640px;margin:0 auto;padding:32px 20px 64px}.head{margin-bottom:24px}.head h1{margin:0;font-size:24px}.muted{color:var(--muted);margin:4px 0 0}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.card h2{margin:0 0 16px;font-size:16px}.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.card-head h2{margin:0}.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:520px){.grid{grid-template-columns:1fr}}.field{margin-bottom:14px}.field:last-child{margin-bottom:0}.field label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px}input[type=text],textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font:inherit;color:var(--text);background:#fff;resize:vertical}input[type=text]:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #4f46e526}.switch{display:inline-flex;align-items:center;gap:10px;cursor:pointer;-webkit-user-select:none;user-select:none}.switch input{display:none}.slider{position:relative;width:44px;height:24px;background:#cbd5e1;border-radius:999px;transition:background .2s;flex:none}.slider:before{content:"";position:absolute;top:2px;left:2px;width:20px;height:20px;background:#fff;border-radius:50%;transition:transform .2s}.switch input:checked+.slider{background:var(--accent)}.switch input:checked+.slider:before{transform:translate(20px)}.switch-label{font-size:14px;font-weight:600}.banner{border-radius:8px;padding:12px 14px;margin-bottom:16px;font-size:14px}.banner.success{background:var(--ok-bg);color:var(--ok-text)}.banner.error{background:var(--err-bg);color:var(--err-text)}.actions{display:flex;justify-content:flex-end}.btn{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:11px 24px;font:inherit;font-weight:600;cursor:pointer;transition:background .15s}.btn:hover:not(:disabled){background:var(--accent-hover)}.btn:disabled{opacity:.6;cursor:not-allowed}