:root {
    --primary: #3498db;
    --secondary: #2c3e50;
    --accent: #e74c3c;
    --light: #ecf0f1;
    --dark: #34495e;
    --success: #2ecc71;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
}

header {
    background-color: var(--primary);
    color: var(--white);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo span {
    margin-left: 0.5rem;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
}

nav ul li a:hover {
    color: var(--light);
}

.btn {
    padding: 0.6rem 1.2rem;
    background-color: var(--accent);
    color: var(--white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    display: inline-block;
}

.btn:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #1a252f;
}

.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.9), rgba(44, 62, 80, 0.9)), url('/api/placeholder/1200/600') center/cover no-repeat;
    color: var(--white);
    text-align: center;
    padding: 8rem 2rem;
    margin-top: 4rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 2rem;
}

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

section {
    padding: 5rem 2rem;
}

h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2.5rem;
    color: var(--secondary);
}

.section-subtitle {
    text-align: center;
    margin-top: -2rem;
    margin-bottom: 3rem;
    font-size: 1.2rem;
    color: var(--dark);
    opacity: 0.8;
}

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

.feature {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.feature h3 {
    margin-bottom: 1rem;
}

.showcase {
    background-color: var(--secondary);
    color: var(--white);
}

.showcase h2 {
    color: var(--white);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.gallery-item video {
    width: 100%;
    display: block;
    transition: transform 0.3s ease;
}

.gallery-item:hover video {
    transform: scale(1.05);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.7);
    padding: 1rem;
    color: var(--white);
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

.installation {
    background-color: var(--light);
}

.installation-steps {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.step {
    display: flex;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    background-color: var(--primary);
    color: var(--white);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: 0.5rem;
}

.download {
    text-align: center;
    background-color: var(--white);
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.download-option {
    background-color: var(--light);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    width: 300px;
    transition: transform 0.3s ease;
}
.source-option {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.download-option:hover {
    transform: translateY(-5px);
}

.download-option h3 {
    margin-bottom: 1rem;
}

.download-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.system-requirements {
    margin-top: 2rem;
    max-width: 800px;
    margin: 3rem auto 0;
}

.system-requirements h3 {
    margin-bottom: 1rem;
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
    background-color: var(--white);
    box-shadow: var(--shadow);
    border-radius: 8px;
    overflow: hidden;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--light);
}

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

tr:last-child td {
    border-bottom: none;
}

.faq {
    background-color: var(--light);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: rgba(52, 152, 219, 0.1);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    border-top: 1px solid var(--light);
}

footer {
    background-color: var(--secondary);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 1.5rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.footer-links a {
    color: var(--light);
    text-decoration: none;
    display: block;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

.code-snippet {
    background-color: #f7f9fb;
    padding: 1.5rem;
    border-radius: 8px;
    margin: 1rem 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    border-left: 4px solid var(--primary);
}

@media (max-width: 768px) {
    header {
        padding: 0.5rem 0;
    }
    
    .header-content {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 1rem;
    }
    
    nav ul li {
        margin-left: 0.75rem;
        margin-right: 0.75rem;
    }
    
    .hero {
        padding: 6rem 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        margin-bottom: 0.5rem;
    }
    
    section {
        padding: 3rem 1rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .footer-section {
        flex: 100%;
        text-align: center;
    }
}