/* VS Code Theme Matching - Professional Dark Theme */
:root {
    /* VS Code inspired color palette */
    --primary-color: #00d4ff;        /* Bright Cyan - VS Code primary */
    --primary-color-rgb: 0, 212, 255; /* RGB values for primary color */
    --secondary-color: #ff6b6b;       /* Coral Red - VS Code error/warning */
    --secondary-color-rgb: 255, 107, 107; /* RGB values for secondary color */
    --accent-color: #a78bfa;         /* Purple accent - VS Code purple */
    --accent-color-rgb: 167, 139, 250; /* RGB values for accent color */

    /* VS Code dark theme colors */
    --background-color: #0a0e1a;     
    --background-color-rgb: 10, 14, 26; /* RGB values for background color */
    --text-color: #ffffff;           /* VS Code white text */
    --text-light: #c9d1d9;           /* VS Code light gray text */
    --text-muted: #8b949e;           /* VS Code muted text */

    /* VS Code inspired card and container styling */
    --card-background: rgba(15, 23, 42, 0.9); /* VS Code panel background */
    --card-background-solid: #0f172a; /* VS Code solid background */
    --hover-effect: rgba(0, 212, 255, 0.15);    /* VS Code selection hover */
    --footer-color: #0a0e1a;         /* VS Code editor background */
    --header-bg: rgba(10, 14, 26, 0.95); /* VS Code header background */

    /* VS Code UI elements */
    --shadow-color: rgba(var(--primary-color-rgb), 0.4);
    --card-border: rgba(0, 212, 255, 0.3);
    --card-glow: 0 8px 32px rgba(var(--primary-color-rgb), 0.4);
    --card-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
    --button-hover: rgba(0, 212, 255, 0.25);

    /* Professional layout measurements */
    --transition-speed: 0.3s;
    --transition-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --border-radius: 0.75rem;
    --content-width: 1400px;
    --section-spacing: 100px;
    --element-spacing: 24px;
    --container-padding: 2rem;

    /* Typography */
    --font-heading: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    --line-height: 1.6;

    /* header */
    --header-bg: rgba(30, 30, 47, 0.98);
    --header-bg-scrolled: rgba(20, 20, 35, 0.98);
    --header-height: 70px;
    --header-height-scrolled: 60px;
}

/* Background Animation Styles */
#background-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.15;
}

/* Enhanced Animation System */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes borderGlow {
    0% { border-color: var(--primary-color); }
    50% { border-color: var(--accent-color); }
    100% { border-color: var(--primary-color); }
}

/* Staggered animation classes */
.animate-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s var(--transition-function), transform 0.6s var(--transition-function);
}

.animate-item.active {
    opacity: 1;
    transform: translateY(0);
}

/* Delay utility classes */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* Interactive hover effects */
.hover-lift {
    transition: transform 0.4s var(--transition-function), box-shadow 0.4s var(--transition-function);
}

.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--card-glow);
}

.hover-glow {
    position: relative;
    overflow: hidden;
}

.hover-glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(var(--primary-color-rgb), 0.15), transparent 70%);
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 0.4s ease, transform 0.4s ease;
    pointer-events: none;
    z-index: -1;
}

.hover-glow:hover::after {
    opacity: 1;
    transform: scale(1);
}

/* Gradient borders */
.gradient-border {
    position: relative;
    background: var(--card-background);
    background-clip: padding-box;
    border: 1px solid transparent;
}

.gradient-border::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: -1;
    margin: -1px;
    border-radius: inherit;
    background: linear-gradient(
        45deg,
        var(--primary-color),
        var(--accent-color),
        var(--secondary-color),
        var(--primary-color)
    );
    background-size: 300% 300%;
    opacity: 0.3;
    transition: opacity 0.4s ease;
}

.gradient-border:hover::before {
    opacity: 1;
    animation: gradientFlow 3s linear infinite;
}