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

:root {
    --primary-color: #518ef7;
    --primary-dark: #6e82f7;
    --secondary-color: #414fea;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation Bar */
.navbar {
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.gp-download-btn {
    display: inline-block;
    transition: transform 0.3s ease;
}

.gp-download-btn:hover {
    transform: translateY(-2px) scale(1.05);
}

.gp-badge {
    height: 60px;
    width: auto;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.feature-category {
    margin-bottom: 4rem;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.category-icon {
    font-size: 2rem;
}

.category-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

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

/* Gallery Section */
.gallery {
    padding: 80px 0;
    background-color: var(--bg-light);
}

.gallery-grid {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 1rem;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-light);
}

.gallery-grid::-webkit-scrollbar {
    height: 8px;
}

.gallery-grid::-webkit-scrollbar-track {
    background: var(--bg-light);
    border-radius: 4px;
}

.gallery-grid::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.gallery-grid::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    background-color: var(--bg-white);
    flex-shrink: 0;
    width: 200px;
}

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

.gallery-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .category-title {
        font-size: 1.5rem;
    }

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

    .gallery-grid {
        justify-content: flex-start;
    }

    .gallery-item {
        width: 150px;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .features,
    .gallery {
        padding: 60px 0;
    }

    .nav-content {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .gp-badge {
        height: 50px;
    }
}