/* ===== CSS Variables & Design System ===== */
:root {
    /* Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-color: #667eea;
    --accent-hover: #5568d3;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #a0aec0;
    --bg-light: #f7fafc;
    --bg-white: #ffffff;
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Rubik', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background: var(--bg-light);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }

    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.app-icon {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--spacing-md);
    transition: transform var(--transition-normal);
}

.app-icon:hover {
    transform: scale(1.05) rotate(5deg);
}

.app-name {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--bg-white);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.tagline {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    font-weight: 400;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-md);
}

.description {
    font-size: clamp(1rem, 2vw, 1.125rem);
    color: rgba(255, 255, 255, 0.85);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.8;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-white);
    color: var(--accent-color);
    padding: 1rem 2rem;
    border-radius: var(--radius-full);
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
    color: var(--bg-white);
}

.download-btn:hover::before {
    opacity: 1;
}

.play-icon {
    width: 24px;
    height: 24px;
}

/* ===== Screenshot Section ===== */
.screenshot-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-white);
}

/* Carousel Styles */
.screenshot-carousel {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.carousel-track {
    position: relative;
    width: 100%;
    max-width: 400px;
    height: 700px;
    overflow: hidden;
}

.screenshot-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-slide.active {
    opacity: 1;
    z-index: 1;
}

.screenshot {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal);
}

.screenshot:hover {
    transform: scale(1.02);
    box-shadow: var(--card-shadow-hover);
}

/* Carousel Buttons */
.carousel-btn {
    background: var(--bg-white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 2rem;
    color: var(--accent-color);
    cursor: pointer;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.carousel-btn:hover {
    background: var(--accent-color);
    color: var(--bg-white);
    transform: scale(1.1);
}

.carousel-btn:active {
    transform: scale(0.95);
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-light);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot:hover {
    background: var(--accent-hover);
    transform: scale(1.2);
}

.carousel-dot.active {
    background: var(--accent-color);
    width: 24px;
    border-radius: var(--radius-full);
}


/* ===== Features Section ===== */
.features {
    padding: var(--spacing-2xl) var(--spacing-md);
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    margin: var(--spacing-md) auto 0;
    border-radius: var(--radius-full);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    transition: transform var(--transition-normal);
}

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

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
    background: var(--text-primary);
    color: var(--bg-white);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-text {
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.footer-link {
    color: var(--bg-white);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
}

.footer-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.separator {
    margin: 0 var(--spacing-sm);
    opacity: 0.5;
}

.copyright {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: var(--spacing-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .app-icon {
        width: 100px;
        height: 100px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .screenshot {
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .download-btn {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }

    .feature-card {
        padding: var(--spacing-lg);
    }
}
/* Carousel Responsive Styles */
@media (max-width: 768px) {
    .carousel-track {
        max-width: 320px;
        height: 600px;
    }
    
    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .carousel-container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .carousel-track {
        max-width: 280px;
        height: 500px;
    }
}