:root{--color-bg:#fff;--color-bg-secondary:#f8f9fa;--color-bg-tertiary:#f1f3f5;--color-surface:#fff;--color-surface-hover:#f8f9fa;--color-border:#dee2e6;--color-border-light:#e9ecef;--color-text:#212529;--color-text-secondary:#6c757d;--color-text-muted:#adb5bd;--color-accent:#4f46e5;--color-accent-hover:#4338ca;--color-accent-light:#eef2ff;--color-accent-text:#fff;--color-success:#16a34a;--color-success-light:#dcfce7;--color-warning:#d97706;--color-warning-light:#fef3c7;--color-danger:#dc2626;--color-danger-light:#fee2e2;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Fira Code","Consolas",monospace;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--shadow-sm:0 1px 2px rgba(0,0,0,.05);--shadow-md:0 4px 6px rgba(0,0,0,.07);--shadow-lg:0 10px 15px rgba(0,0,0,.1);--sidebar-width:260px;--header-height:56px;--max-content-width:960px}*,:after,:before{box-sizing:border-box;margin:0;padding:0}body,html{height:100%;font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--color-text);background:var(--color-bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--color-accent);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;font-size:inherit}code{font-family:var(--font-mono);font-size:.9em;background:var(--color-bg-tertiary);padding:2px 6px;border-radius:var(--radius-sm)}