:root{--bg: #0e0e10;--panel: #16161a;--text: #eaeaea;--muted: #9aa0a6;--primary: #4da3ff;--danger: #ff6b6b;--success: #2ecc71;--border: #2a2a2f}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,Arial,sans-serif;line-height:1.4}.app-header{background:#111;border-bottom:1px solid var(--border)}.container{padding:16px}.card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:12px}h2,h3,h4{margin:0 0 12px}label{display:grid;gap:6px;font-size:14px;color:var(--muted)}input,select{background:#111;color:var(--text);border:1px solid var(--border);border-radius:8px;padding:8px 10px}button{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:8px 12px;cursor:pointer}button[disabled]{opacity:.6;cursor:not-allowed}button.btn-danger{background:var(--danger)}button.btn-success{background:var(--success)}ul{padding-left:18px}li+li{margin-top:6px}.notice{color:var(--muted);font-size:13px}.text-error{color:tomato}.text-success{color:var(--success)}.link{color:var(--primary);text-decoration:none}.link:hover{text-decoration:underline}