:root {
    --bg-primary: #0d0d0d;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --bg-hover: #1e1e1e;
    --bg-card: #111111;

    --color-accent: #2563eb;
    --color-accent-bright: #60a5fa;
    --color-accent-dim: #1e40af;

    --text-primary: #e8e8e8;
    --text-secondary: #999999;
    --text-muted: #555555;
    --text-link: #4d9ff5;

    --border-color: #1e1e1e;
    --border-light: #2a2a2a;

    --sidebar-width: 240px;
    --header-height: 56px;
    --content-max-width: 800px;

    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --transition: 0.15s ease;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}