/* ============================================
   ROOT VARIABLES & RESET
   ============================================ */
:root {
    /* Color Palette */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --accent: #f093fb;
    --success: #4facfe;
    --warning: #fa709a;
    
    /* Gradients */
    --gradient-main: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-warm: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-cool: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-sunset: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    
    /* Neutrals */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(255, 255, 255, 0.05);
    --text-primary: #ffffff;
    --text-secondary: #b4b4c5;
    --text-muted: #6b6b80;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

/* ============================================
   BASE STYLES
   ============================================ */
body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ============================================
   ANIMATED BACKGROUND
   ============================================ */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#particleCanvas {
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

/* Gradient Orbs */
.gradient-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
    z-index: 1;
    pointer-events: none;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #667eea 0%, transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #f093fb 0%, transparent 70%);
    bottom: -10%;
    right: -10%;
    animation-delay: 5s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #4facfe 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* ============================================
   CONTAINER
   ============================================ */
.container {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease backwards;
}

/* Logo */
.logo-wrapper {
    display: inline-block;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.logo-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto;
    animation: rotate 20s linear infinite;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 20px rgba(102, 126, 234, 0.5));
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* Title */
.title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    animation: fadeInUp 0.8s ease 0.3s backwards;
}

.title-main {
    display: block;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.title-sub {
    display: block;
    font-size: 0.5em;
    background: var(--gradient-cool);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

/* Subtitle */
.subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

/* Stats Bar */
.stats-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.5s backwards;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

/* ============================================
   NAVIGATION MENU
   ============================================ */
.menu {
    display: grid;
    gap: var(--spacing-lg);
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

/* Category Card */
.category {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-main);
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.category:hover {
    transform: translateY(-5px);
    border-color: rgba(102, 126, 234, 0.5);
    box-shadow: 0 16px 48px rgba(102, 126, 234, 0.2);
}

.category:hover::before {
    opacity: 0.05;
}

/* Category Header */
.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--glass-border);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-main);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.category:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

.category-icon svg {
    width: 24px;
    height: 24px;
}

.category-text {
    flex: 1;
}

.category h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.category-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.category-badge {
    width: 32px;
    height: 32px;
    background: rgba(102, 126, 234, 0.2);
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--primary);
}

/* Category Links */
.category-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.category-links li {
    margin: 0;
}

/* Link Card */
.link-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 1s ease;
}

.link-card:hover::before {
        left: -100%;
    width: 100%;
    height: 100%;
}

.link-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(102, 126, 234, 0.4);
    /* transform: translateX(0px); */
    box-shadow: 0 2px 2px rgba(102, 126, 234, 0.15);
}

.link-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-sm);
    transition: transform var(--transition-base);
}

/* .link-card:hover .link-icon {
    transform: scale(1);
} */

.link-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.link-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

.link-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.link-arrow {
    font-size: 1.5rem;
    color: var(--primary);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.link-card:hover .link-arrow {
    /* transform: translateX(4px); */
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    margin-top: auto;
    padding-top: var(--spacing-xl);
    text-align: center;
    animation: fadeInUp 0.8s ease 0.7s backwards;
}

.footer-text {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.heart {
    color: #f5576c;
    animation: heartbeat 1.5s ease infinite;
    display: inline-block;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.footer-link:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
    }
    
    .container {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .stats-bar {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stat-divider {
        width: 80%;
        height: 1px;
    }
    
    .category-header {
        flex-wrap: wrap;
    }
    
    .category-badge {
        margin-left: auto;
    }
    
    .link-card {
        padding: var(--spacing-sm);
    }
    
    .link-icon {
        width: 36px;
        height: 36px;
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .category-icon {
        width: 40px;
        height: 40px;
    }
    
    .category h2 {
        font-size: 1.25rem;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ============================================
   OVERLAY CONTENT STYLES (for sub-pages)
   ============================================ */
.overlay-content {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    max-width: 800px;
    margin: var(--spacing-lg) auto;
    box-shadow: var(--shadow-xl);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--spacing-lg);
    padding: 0.75rem 1.5rem;
    background: var(--gradient-main);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-base);
}

.back-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.3);
}