*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f5f7fa;--sidebar-bg: #1e2433;--sidebar-text: #c8cfe0;--sidebar-hover: #2a3147;--sidebar-active: #3b82f6;--panel-bg: #ffffff;--border: #e5e9f0;--text: #1a2030;--text-muted: #6b7a99;--blue: #3b82f6;--blue-dark: #2563eb;--red: #ef4444;--green: #22c55e;--yellow: #f59e0b;--shadow: 0 1px 3px rgba(0,0,0,.1)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);height:100vh;overflow:hidden}#root{height:100vh}button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit}input,textarea,select{font-family:inherit;font-size:inherit}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:6px;font-weight:500;font-size:14px;transition:background .15s}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark)}.btn-danger{background:var(--red);color:#fff}.btn-danger:hover{background:#dc2626}.btn-ghost{color:var(--text-muted);padding:8px}.btn-ghost:hover{background:var(--border);color:var(--text);border-radius:6px}