*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #f7f6f3;--surface: #ffffff;--border: #e8e6e0;--text: #1a1916;--text-muted: #888580;--text-faint: #bbb9b4;--accent: #2563eb;--accent-bg: #eff6ff;--success: #16a34a;--success-bg: #f0fdf4;--danger: #dc2626;--sidebar-w: 220px;--radius: 10px;font-family:DM Sans,system-ui,sans-serif}body{background:var(--bg);color:var(--text);height:100vh;overflow:hidden}#root{height:100vh;display:flex;flex-direction:column}button{font-family:inherit;cursor:pointer;border:none;background:none}input,textarea{font-family:inherit;border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px;font-size:14px;outline:none;width:100%;background:var(--surface);color:var(--text)}input:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2563eb1a}.btn-primary{background:var(--accent);color:#fff;padding:9px 20px;border-radius:var(--radius);font-size:14px;font-weight:500;transition:opacity .15s}.btn-primary:hover{opacity:.88}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-ghost{color:var(--text-muted);padding:6px 12px;border-radius:8px;font-size:13px;transition:background .15s}.btn-ghost:hover{background:var(--bg)}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}