:root{--color-bg:#0f1117;--color-bg-secondary:#1a1d27;--color-bg-tertiary:#252836;--color-surface:#2a2d3a;--color-border:#363a4a;--color-text:#e8eaed;--color-text-secondary:#9aa0b0;--color-text-muted:#6b7084;--color-primary:#4f8cff;--color-primary-hover:#6ba0ff;--color-danger:#ff4f6a;--color-success:#4fff8c;--color-warning:#ffa64f;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--sidebar-width:320px;--header-height:56px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{background:var(--color-bg);height:100%;color:var(--color-text);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.5}a{color:var(--color-primary);text-decoration:none}button{cursor:pointer;border-radius:var(--radius-sm);border:none;padding:8px 16px;font-family:inherit;font-size:.9rem;transition:background .15s,opacity .15s}button:disabled{opacity:.5;cursor:not-allowed}button.primary{background:var(--color-primary);color:#fff}button.primary:hover:not(:disabled){background:var(--color-primary-hover)}button.danger{background:var(--color-danger);color:#fff}button.ghost{color:var(--color-text-secondary);background:0 0}button.ghost:hover:not(:disabled){background:var(--color-surface)}input,textarea{background:var(--color-bg-tertiary);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-text);outline:none;width:100%;padding:8px 12px;font-family:inherit;font-size:.9rem;transition:border-color .15s}input:focus,textarea:focus{border-color:var(--color-primary)}.sr-only{clip:rect(0, 0, 0, 0);width:1px;height:1px;position:absolute;overflow:hidden}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}