*{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f4f6fb;--panel: #ffffff;--panel-2: #eef1f7;--border: #d8dde8;--text: #1c2330;--muted: #6b7488;--accent: #2f6bff;--accent-soft: #e6efff;--danger: #d83a3a;--danger-soft: #fdeaea;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}html,body,#root{height:100%;background:var(--bg);color:var(--text)}.app{display:flex;flex-direction:column;height:100vh;width:100vw;overflow:hidden}.topnav{height:40px;flex-shrink:0;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:stretch;padding:0 4px;-webkit-user-select:none;user-select:none}.menu{position:relative;display:flex;align-items:center}.menu>button{height:100%;padding:0 14px;background:transparent;border:none;color:var(--text);font-size:13px;cursor:pointer;border-radius:6px}.menu>button:hover,.menu.open>button{background:var(--accent-soft)}.menu-items{position:absolute;top:38px;left:0;min-width:220px;background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:0 12px 30px #141e3c29;padding:6px;z-index:100}.menu-items button{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:9px 12px;background:transparent;border:none;color:var(--text);font-size:13px;text-align:left;cursor:pointer;border-radius:7px}.menu-items button:hover:not(:disabled){background:var(--accent-soft)}.menu-items button:disabled{color:var(--muted);cursor:not-allowed}.menu-items .shortcut{color:var(--muted);font-size:11px}.menu-sep{height:1px;background:var(--border);margin:6px 4px}.topnav .brand{display:flex;align-items:center;gap:8px;padding:0 14px 0 8px;font-weight:700;font-size:14px;color:var(--accent)}.topnav .spacer{flex:1}.topnav .saved-tag{display:flex;align-items:center;gap:6px;padding:0 14px;font-size:12px;color:var(--muted)}.body{flex:1;display:flex;min-height:0}.sidebar{width:80px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;align-items:center;gap:6px;padding:10px 0;overflow-y:auto}.sidebar .rail-btn{width:56px;height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;background:transparent;border:1px solid transparent;border-radius:12px;color:var(--text);cursor:pointer;transition:all .12s ease}.sidebar .rail-btn:hover{background:var(--panel-2);border-color:var(--border)}.sidebar .rail-btn span{font-size:10px;color:var(--muted)}.sidebar .rail-sep{width:44px;height:1px;background:var(--border);margin:6px 0}.sidebar .rail-btn.danger{color:var(--danger)}.sidebar .rail-btn.danger:hover{background:var(--danger-soft)}.canvas-wrap{flex:1;position:relative;background:#e9edf5;overflow:hidden}.status-bar{position:absolute;bottom:12px;left:12px;font-size:12px;color:var(--muted);background:#ffffffb3;border:1px solid var(--border);padding:6px 10px;border-radius:8px;pointer-events:none}