/* ===== CSS VARIABLES ===== */
:root {
    /* Light Theme Colors - Synchronized with background.avif */
    --bg-primary-light: hsl(252, 15%, 92%);
    --bg-secondary-light: hsl(248, 12%, 88%);
    --bg-tertiary-light: hsl(255, 8%, 95%);
    --accent-light: hsl(255, 25%, 85%);
    --text-primary-light: hsl(252, 35%, 15%);
    --text-secondary-light: hsl(248, 20%, 45%);
    --text-accent-light: hsl(255, 45%, 35%);
    
    /* Dark Theme Colors - Synchronized with background-dark.avif */
    --bg-primary-dark: hsl(252, 35%, 8%);
    --bg-secondary-dark: hsl(248, 32%, 12%);
    --bg-tertiary-dark: hsl(255, 28%, 5%);
    --accent-dark: hsl(255, 45%, 15%);
    --text-primary-dark: hsl(252, 15%, 92%);
    --text-secondary-dark: hsl(248, 12%, 75%);
    --text-accent-dark: hsl(255, 25%, 85%);
    
    /* Synchronized Gradient Overlays */
    --overlay-gradient-light: linear-gradient(135deg, 
        hsla(252, 15%, 95%, 0.85) 0%, 
        hsla(248, 12%, 90%, 0.75) 100%);
    --overlay-gradient-dark: linear-gradient(135deg, 
        hsla(252, 35%, 5%, 0.85) 0%, 
        hsla(248, 32%, 8%, 0.75) 100%);
    
    /* Dynamic Theme Variables (Default: Light) */
    --bg-primary: var(--bg-primary-light);
    --bg-secondary: var(--bg-secondary-light);
    --bg-tertiary: var(--bg-tertiary-light);
    --bg-card: hsla(255, 25%, 98%, 0.95);
    --bg-glass: hsla(255, 25%, 100%, 0.1);
    --bg-overlay: var(--overlay-gradient-light);
    
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --text-light: #ffffff;
    --text-accent: var(--text-accent-light);
    
    /* Primary Gradients - Maintained across themes */
    --primary-gradient: linear-gradient(135deg, hsl(255, 65%, 70%) 0%, hsl(248, 55%, 60%) 100%);
    --accent-gradient: linear-gradient(135deg, hsl(320, 85%, 75%) 0%, hsl(350, 75%, 65%) 100%);
    --success-gradient: linear-gradient(135deg, hsl(200, 85%, 70%) 0%, hsl(180, 95%, 65%) 100%);
    
    /* Theme-specific primary colors */
    --primary-500: hsl(255, 65%, 70%);
    --primary-600: hsl(255, 60%, 65%);
    --primary-700: hsl(255, 55%, 60%);
    
    --accent-500: hsl(320, 85%, 75%);
    --accent-600: hsl(320, 80%, 70%);
    
    /* Grayscale with theme awareness */
    --gray-50: var(--bg-tertiary);
    --gray-100: var(--bg-secondary);
    --gray-200: var(--bg-primary);
    --gray-300: var(--text-secondary);
    --gray-400: var(--text-primary);
    --gray-500: var(--text-accent);
    --gray-600: var(--accent-light);
    --gray-700: var(--accent-dark);
    --gray-800: var(--bg-secondary-dark);
    --gray-900: var(--bg-primary-dark);
    
    --white: #ffffff;
    --black: #000000;
    
    /* Typography - Using Inter font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Dark Theme Variables Override */
:root,
[data-theme="dark"] {
    --bg-primary: var(--bg-primary-dark);
    --bg-secondary: var(--bg-secondary-dark);
    --bg-tertiary: var(--bg-tertiary-dark);
    --bg-card: hsla(252, 35%, 10%, 0.95);
    --bg-glass: hsla(252, 35%, 15%, 0.1);
    --bg-overlay: var(--overlay-gradient-dark);
    
    --text-primary: var(--text-primary-dark);
    --text-secondary: var(--text-secondary-dark);
    --text-accent: var(--text-accent-dark);
    
    --gray-50: var(--bg-primary-dark);
    --gray-100: var(--bg-secondary-dark);
    --gray-200: var(--bg-tertiary-dark);
    --gray-300: var(--text-secondary-dark);
    --gray-400: var(--text-primary-dark);
}

/* Light Theme Override (when explicitly set) */
[data-theme="light"] {
    --bg-primary: var(--bg-primary-light);
    --bg-secondary: var(--bg-secondary-light);
    --bg-tertiary: var(--bg-tertiary-light);
    --bg-card: hsla(255, 25%, 98%, 0.95);
    --bg-glass: hsla(255, 25%, 100%, 0.1);
    --bg-overlay: var(--overlay-gradient-light);
    
    --text-primary: var(--text-primary-light);
    --text-secondary: var(--text-secondary-light);
    --text-accent: var(--text-accent-light);
    
    --gray-50: var(--bg-tertiary-light);
    --gray-100: var(--bg-secondary-light);
    --gray-200: var(--bg-primary-light);
    --gray-300: var(--text-secondary-light);
    --gray-400: var(--text-primary-light);
}

/* ===== RESET & BASE STYLES ===== */
:root {
    --scrollbar-thumb: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-700) 100%);
    --scrollbar-track: var(--bg-secondary);
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

/* Custom scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 5px;
    border: 2px solid var(--scrollbar-track);
    transition: all var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    border-width: 1px;
}

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

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: color var(--transition-normal), background-color var(--transition-normal);
}

/* ===== AVIF BACKGROUND SYSTEM ===== */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    overflow: hidden;
}

.background-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    transition: opacity 650ms cubic-bezier(0.4, 0.0, 0.2, 1);
    will-change: opacity;
    transform: translateZ(0); /* GPU acceleration */
}

.background-light {
    background-image: url('background.avif');
    opacity: 0;
}

.background-dark {
    background-image: url('background-dark.avif');
    opacity: 1;
}

/* Light theme background transition */
[data-theme="light"] .background-light {
    opacity: 1;
}

[data-theme="light"] .background-dark {
    opacity: 0;
}

.background-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-overlay);
    z-index: -1;
    transition: background 650ms cubic-bezier(0.4, 0.0, 0.2, 1);
    backdrop-filter: blur(1px);
}

/* Fallback for browsers that don't support AVIF */
@supports not (background-image: url('image.avif')) {
    .background-light {
        background-image: url('background.jpg'), url('background.webp');
    }
    
    .background-dark {
        background-image: url('background-dark.jpg'), url('background-dark.webp');
    }
}

/* Mobile optimization - prevent iOS scroll issues */
@media (max-width: 768px) {
    .background-image {
        background-attachment: scroll;
        background-size: cover;
    }
}

/* High-DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .background-light {
        background-image: url('background@2x.avif'), url('background.avif');
    }
    
    .background-dark {
        background-image: url('background-dark@2x.avif'), url('background-dark.avif');
    }
}

/* Respect user motion preferences */
@media (prefers-reduced-motion: reduce) {
    .background-image,
    .background-overlay {
        transition: none;
    }
}



/* ===== CONSTELLATION CANVAS ===== */
.constellation-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.8;
    background: transparent;
    transition: opacity var(--transition-normal);
}

[data-theme="light"] .constellation-canvas {
    opacity: 0.3;
}

/* ===== STELLAR EFFECTS ===== */
.star {
    position: absolute;
    background: radial-gradient(circle, rgba(255,255,255,1) 0%, rgba(255,255,255,0.8) 30%, transparent 70%);
    border-radius: 50%;
    animation: twinkle 3s ease-in-out infinite;
    pointer-events: none;
}

.star.bright {
    animation: brighten 4s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(255,255,255,0.8), 0 0 20px rgba(255,255,255,0.4);
}

.star.pulsar {
    animation: pulsar 2s ease-in-out infinite;
    background: radial-gradient(circle, rgba(147, 197, 253, 1) 0%, rgba(147, 197, 253, 0.6) 40%, transparent 70%);
    box-shadow: 0 0 8px rgba(147, 197, 253, 0.6);
}

.constellation-line {
    position: absolute;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.3) 20%, 
        rgba(255, 255, 255, 0.5) 50%, 
        rgba(255, 255, 255, 0.3) 80%, 
        transparent 100%);
    transform-origin: 0 50%;
    animation: lineGlow 6s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { 
        opacity: 0.4; 
        transform: scale(1); 
    }
    25% { 
        opacity: 0.8; 
        transform: scale(1.2); 
    }
    50% { 
        opacity: 1; 
        transform: scale(1.5); 
    }
    75% { 
        opacity: 0.6; 
        transform: scale(1.1); 
    }
}

@keyframes brighten {
    0%, 100% { 
        opacity: 0.6; 
        transform: scale(1) rotate(0deg);
        box-shadow: 0 0 5px rgba(255,255,255,0.4);
    }
    50% { 
        opacity: 1; 
        transform: scale(1.8) rotate(180deg);
        box-shadow: 0 0 15px rgba(255,255,255,0.8), 0 0 30px rgba(255,255,255,0.4);
    }
}

@keyframes pulsar {
    0%, 100% { 
        opacity: 0.3; 
        transform: scale(0.8);
    }
    50% { 
        opacity: 1; 
        transform: scale(2);
        box-shadow: 0 0 15px rgba(147, 197, 253, 0.8), 0 0 25px rgba(147, 197, 253, 0.4);
    }
}

@keyframes lineGlow {
    0%, 100% { 
        opacity: 0.2; 
    }
    50% { 
        opacity: 0.6; 
    }
}

@keyframes shootingStar {
    0% {
        transform: translateX(-100px) translateY(-100px);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateX(100vw) translateY(100vh);
        opacity: 0;
    }
}

.shooting-star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 0 0 1px white, -50px -50px 30px 0px rgba(255,255,255,0.3);
    animation: shootingStar 3s ease-out;
    pointer-events: none;
}

/* ===== ENHANCED PARTICLES ===== */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: radial-gradient(circle, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 50%, transparent 100%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
    opacity: 0.6;
    transition: all var(--transition-normal);
}

[data-theme="light"] .particle {
    background: radial-gradient(circle, rgba(100,100,200,0.4) 0%, rgba(100,100,200,0.2) 50%, transparent 100%);
    opacity: 0.3;
}

.particle:nth-child(1) { top: 15%; left: 10%; animation-delay: 0s; animation-duration: 7s; }
.particle:nth-child(2) { top: 60%; left: 85%; animation-delay: 1.5s; animation-duration: 9s; }
.particle:nth-child(3) { top: 85%; left: 25%; animation-delay: 3s; animation-duration: 6s; }
.particle:nth-child(4) { top: 30%; left: 75%; animation-delay: 4.5s; animation-duration: 8s; }
.particle:nth-child(5) { top: 5%; left: 65%; animation-delay: 6s; animation-duration: 7.5s; }
.particle:nth-child(6) { top: 75%; left: 5%; animation-delay: 7.5s; animation-duration: 8.5s; }

@keyframes float {
    0%, 100% { 
        transform: translateY(0px) translateX(0px) scale(1) rotate(0deg); 
        opacity: 0.3; 
    }
    25% { 
        transform: translateY(-15px) translateX(10px) scale(1.2) rotate(90deg); 
        opacity: 0.8; 
    }
    50% { 
        transform: translateY(-30px) translateX(-5px) scale(1.5) rotate(180deg); 
        opacity: 1; 
    }
    75% { 
        transform: translateY(-10px) translateX(-15px) scale(1.1) rotate(270deg); 
        opacity: 0.6; 
    }
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--bg-glass);
    transition: all var(--transition-normal);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-500);
    stroke-width: 2;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: color var(--transition-normal);
}

.nav {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: width var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

/* ===== MAIN CONTENT ===== */
.main {
    padding-top: 70px;
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-20) var(--space-6);
    text-align: center;
}

.hero-content {
    max-width: 800px;
    width: 100%;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
    line-height: 1.1;
}

.title-gradient {
    color: var(--text-primary);
    display: block;
    transition: color var(--transition-normal);
}

.title-accent {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 500;
    margin-top: var(--space-2);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--space-12);
    line-height: 1.5;
    transition: color var(--transition-normal);
}

/* ===== FILE CARD ===== */
.file-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    margin-bottom: var(--space-10);
    box-shadow: var(--shadow-2xl);
}

.file-details {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.file-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

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

.file-info {
    flex: 1;
}

.file-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.file-meta {
    display: flex;
    gap: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.file-status {
    flex-shrink: 0;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.status-icon {
    width: 16px;
    height: 16px;
}

/* ===== DOWNLOAD SECTION ===== */
.download-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.download-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--primary-gradient);
    color: var(--white);
    border: none;
    border-radius: var(--radius-xl);
    padding: var(--space-5) var(--space-8);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-normal);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    min-width: 240px;
    justify-content: center;
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2xl);
}

.download-button:active {
    transform: translateY(0);
}

.download-icon {
    width: 20px;
    height: 20px;
    transition: var(--transition-fast);
}

.download-button:hover .download-icon {
    animation: bounce 0.6s ease-in-out;
}

.button-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: var(--transition-slow);
}

.download-button:hover .button-shine {
    left: 100%;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-3px); }
    60% { transform: translateY(-1px); }
}

.fallback-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.fallback-link:hover {
    color: var(--white);
}

.link-icon {
    width: 16px;
    height: 16px;
}

.download-stats {
    display: flex;
    gap: var(--space-8);
    margin-top: var(--space-6);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--white);
    margin-bottom: var(--space-1);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== FEATURES SECTION ===== */
.features-section {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    padding: var(--space-20) var(--space-6);
    transition: background-color var(--transition-normal);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-16);
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--bg-glass);
    backdrop-filter: blur(8px);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-4);
    color: var(--white);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    transition: color var(--transition-normal);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
    transition: color var(--transition-normal);
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    color: var(--text-primary);
    padding: var(--space-16) var(--space-6) var(--space-8);
    transition: all var(--transition-normal);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-8);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section li {
    margin-bottom: var(--space-2);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--text-primary);
}

.download-badge {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--bg-glass);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(8px);
    border: 1px solid var(--bg-glass);
}

.badge-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-500);
}

.badge-text {
    font-weight: 500;
    color: var(--text-primary);
    transition: color var(--transition-normal);
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--space-8) auto 0;
    padding-top: var(--space-8);
    border-top: 1px solid var(--bg-glass);
    text-align: center;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .title-accent {
        font-size: var(--font-size-xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .file-details {
        flex-direction: column;
        text-align: center;
        gap: var(--space-6);
    }
    
    .download-stats {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: var(--space-16) var(--space-4);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .file-card {
        padding: var(--space-6);
    }
    
    .download-button {
        width: 100%;
        min-width: auto;
    }
}

/* ===== UTILITY CLASSES ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center {
    text-align: center;
}

.hidden {
    display: none;
}