:root {
    --font-sans: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", "Monaco", "Cascadia Code", "Roboto Mono", ui-monospace, monospace;

    /* Modern Dark Theme */
    --color-bg: #0a0a0f;
    --color-bg-alt: #0f0f1a;
    --color-bg-elevated: #1a1a2e;
    --color-surface: rgba(255, 255, 255, 0.03);
    --color-surface-alt: rgba(255, 255, 255, 0.06);
    --color-surface-soft: rgba(255, 255, 255, 0.08);
    --color-surface-hover: rgba(255, 255, 255, 0.1);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-border-strong: rgba(255, 255, 255, 0.2);
    --color-border-focus: rgba(99, 102, 241, 0.5);

    --color-text-primary: #ffffff;
    --color-text-secondary: #f3f4ff;
    --color-text-muted: #cfd5ff;
    --color-text-soft: #aab7e8;
    --color-text-inverse: #0a0a0f;

    /* Modern Color Palette */
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-secondary: #ec4899;
    --color-accent: #06b6d4;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    /* Enhanced Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    --shadow-elevated: 0 32px 64px rgba(0, 0, 0, 0.4);
    --shadow-soft: 0 16px 32px rgba(0, 0, 0, 0.2);
    --shadow-inner: inset 0 1px 0 rgba(255, 255, 255, 0.05);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Modern Border Radius */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-3xl: 32px;
    --radius-full: 9999px;

    /* Modern Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #6366f1 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #ef4444 50%, #ec4899 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    --gradient-surface: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    --gradient-border: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(139, 92, 246, 0.3) 100%);

    /* Backdrop Effects */
    --backdrop-blur: blur(20px);
    --backdrop-saturate: saturate(180%);
    --backdrop-brightness: brightness(1.1);

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);

    /* Layout */
    --layout-max-width: 1600px;
    --sidebar-width: 280px;
    --header-height: 80px;
}

/* Legacy variable aliases for compatibility */
:root {
    --bg: var(--color-bg);
    --bg-alt: var(--color-bg-alt);
    --bg-primary: var(--color-bg);
    --bg-secondary: var(--color-surface);
    --border: var(--color-border);
    --border-color: var(--color-border);
    --text: var(--color-text-primary);
    --text-muted: var(--color-text-muted);
    --accent: var(--color-accent);
    --accent-color: var(--color-primary);
    --danger: var(--color-danger);
    --success: var(--color-success);
    --info: var(--color-info);
}



* {
    box-sizing: border-box;
}

*::before,
*::after {
    box-sizing: inherit;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    background: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
        linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    color: var(--color-text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
    font-weight: 400;
    letter-spacing: -0.01em;
    position: relative;
}

body.nav-open {
    overflow: hidden;
}

body.nav-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.65);
    backdrop-filter: blur(6px);
    z-index: 150;
}

@media (min-width: 961px) {
    body.nav-open::after {
        display: none;
    }
}

img,
svg,
video,
canvas {
    max-width: 100%;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-primary-strong);
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

pre,
code,
kbd,
samp {
    font-family: var(--font-mono);
}

::selection {
    background: rgba(56, 189, 248, 0.35);
    color: var(--color-text-primary);
}