.download-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 0 80px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.download-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: rotate 20s linear infinite;
}

.download-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.download-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
}

.platform-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: white;
    color: #667eea;
    border-color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.download-content {
    padding: 60px 0;
    background: white;
}

.platform-info {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.platform-info.active {
    display: block;
}

.platform-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
    padding: 30px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
}

.platform-icon {
    font-size: 60px;
}

.platform-details h2 {
    font-size: 32px;
    color: #333;
    margin-bottom: 10px;
}

.version-info {
    color: #666;
    font-size: 16px;
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.download-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.download-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
    border-color: #667eea;
}

.download-card.premium {
    border-color: #667eea;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8ecff 100%);
}

.download-card.enterprise {
    border-color: #764ba2;
    background: linear-gradient(135deg, #f8f0ff 0%, #e8dcff 100%);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.card-header h3 {
    font-size: 24px;
    color: #333;
}

.badge {
    background: #e0e0e0;
    color: #666;
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.badge.premium {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.badge.enterprise {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    color: white;
}

.download-card .feature-list {
    list-style: none;
    margin-bottom: 30px;
}

.download-card .feature-list li {
    padding: 10px 0;
    color: #555;
    border-bottom: 1px solid #f0f0f0;
}

.download-card .feature-list li:last-child {
    border-bottom: none;
}

.btn-download {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-download.premium {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.btn-download.enterprise {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.file-info {
    text-align: center;
    color: #999;
    font-size: 14px;
}

.system-requirements {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.requirement-item {
    background: white;
    padding: 30px;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.requirement-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.requirement-item h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #667eea;
}

.requirement-item ul {
    list-style: none;
}

.requirement-item li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.requirement-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

.download-features {
    padding: 80px 0;
    background: white;
}

.download-features .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 40px 30px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 20px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
}

.feature-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 15px;
}

.feature-item p {
    color: #666;
    line-height: 1.8;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .download-title {
        font-size: 32px;
    }

    .download-subtitle {
        font-size: 16px;
    }

    .platform-tabs {
        gap: 10px;
    }

    .tab-btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .platform-header {
        flex-direction: column;
        text-align: center;
    }

    .download-options {
        grid-template-columns: 1fr;
    }

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