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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #ffffff;
    min-height: 100vh;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background: rgba(26, 26, 46, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #00d4ff;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: #00d4ff;
}

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

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #00d4ff;
}

.login-btn {
    background: #00d4ff;
    color: #000;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.3s ease;
}

.login-btn:hover {
    background: #0099cc;
}

/* Download Header */
.download-header {
    text-align: center;
    padding: 80px 50px;
    max-width: 1200px;
    margin: 0 auto;
}

.download-header h1 {
    font-size: 3rem;
    color: #00d4ff;
    margin-bottom: 20px;
}

.download-header p {
    font-size: 1.2rem;
    color: #ccc;
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #00d4ff;
    color: #000;
}

.btn-primary:hover {
    background: #0099cc;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #00d4ff;
    border: 2px solid #00d4ff;
}

.btn-secondary:hover {
    background: #00d4ff;
    color: #000;
}

/* About Section */
.about-section {
    padding: 80px 50px;
    max-width: 1200px;
    margin: 0 auto;
}

.about-section h2 {
    font-size: 2.5rem;
    color: #00d4ff;
    text-align: center;
    margin-bottom: 40px;
}

.about-content p {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

/* System Requirements */
.requirements-section {
    padding: 80px 50px;
    max-width: 1200px;
    margin: 0 auto;
}

.requirements-section h2 {
    font-size: 2.5rem;
    color: #00d4ff;
    text-align: center;
    margin-bottom: 40px;
}

.requirements-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: 40px;
}

.req-column {
    background: rgba(42, 42, 74, 0.8);
    padding: 30px;
    border-radius: 10px;
    border: 1px solid #444;
}

.req-column h3 {
    color: #00d4ff;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.req-column ul {
    list-style: none;
}

.req-column li {
    color: #ccc;
    margin-bottom: 10px;
    padding: 5px 0;
}

.req-column strong {
    color: #00d4ff;
}

/* Final Download */
.final-download {
    text-align: center;
    padding: 60px 50px;
}

.btn-download {
    background: #00d4ff;
    color: #000;
    border: none;
    padding: 20px 60px;
    border-radius: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-download:hover {
    background: #0099cc;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* Footer */
.footer {
    background: rgba(26, 26, 46, 0.9);
    border-top: 1px solid #00d4ff;
    padding: 40px 50px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-section h4 {
    color: #00d4ff;
    margin-bottom: 15px;
}

.footer-section p, .footer-section li {
    color: #ccc;
    margin-bottom: 8px;
}

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

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #00d4ff;
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-links a {
    font-size: 1.5rem;
}

.footer-bottom {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #888;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
        flex-direction: column;
        gap: 20px;
    }
    
    .download-header, .about-section, .requirements-section {
        padding: 40px 20px;
    }
    
    .download-header h1 {
        font-size: 2rem;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
}