:root {
    --primary-color: #667EEA;
    --primary-gradient-end: #764BA2;
    --primary-hover: #5a67d8;
    --text-color: #1f2937;
    --text-secondary: #6b7280;
    --bg-color: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --max-width: 1280px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
.header {
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    padding: 1rem 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.lang-switcher {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.lang-btn:hover {
    border-color: var(--primary-color);
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-gradient-end));
    color: white;
    border-color: var(--primary-color);
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* Features Section */
.features {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.features h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-item {
    padding: 2rem;
    background: var(--bg-color);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.feature-item h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.feature-item p {
    color: var(--text-secondary);
}

/* Screenshots Section */
.screenshots {
    padding: 4rem 0;
}

.screenshots h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

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

.screenshot-item img {
    width: 100%;
    max-width: 250px;
    height: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s;
}

.screenshot-item:hover img {
    transform: scale(1.05);
}

.screenshot-item p {
    margin-top: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Store Buttons Section */
.store-buttons {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.store-buttons h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.store-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.store-badge {
    display: inline-block;
    transition: transform 0.2s;
    position: relative;
}

.store-badge:hover {
    transform: scale(1.05);
}

.store-badge img {
    width: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.store-badge.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.coming-soon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
}

/* Legal Links Section */
.legal-links {
    padding: 4rem 0;
}

.legal-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.legal-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    text-decoration: none;
    color: var(--text-color);
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
}

.legal-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.legal-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.legal-card p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    padding: 3rem 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-info {
    color: var(--text-secondary);
}

.footer-info a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-info a:hover {
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        gap: 1rem;
    }
    
    .nav-menu {
        width: 100%;
        order: 3;
        gap: 1rem;
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--border-color);
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .features h2,
    .screenshots h2,
    .store-buttons h2 {
        font-size: 2rem;
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 3rem 0;
    }
    
    .features,
    .screenshots,
    .store-buttons,
    .legal-links {
        padding: 3rem 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}