.download-header {
    text-align: center;
    margin: 4rem 0;
    padding: 2rem 0;
    position: relative;
}

.download-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.download-header p {
    max-width: 800px;
    margin: 1rem auto 0;
    font-size: 1.2rem;
    color: var(--text-light);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin: 4rem 0;
}

.platform-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.platform-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.platform-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.platform-icon {
    margin: 1rem 0 2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.platform-card:hover .platform-icon {
    transform: scale(1.1);
    color: var(--accent-color);
}

.platform-card h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--dark-color);
}

.requirements {
    margin: 2rem 0;
    text-align: left;
    background: rgba(108, 92, 231, 0.05);
    padding: 1.5rem;
    border-radius: calc(var(--border-radius) - 5px);
}

.requirements-title {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.requirements li {
    margin-bottom: 0.8rem;
    position: relative;
    padding-left: 1.8rem;
    color: var(--text-light);
}

.requirements li::before {
    content: '✓';
    color: var(--success-color);
    font-weight: bold;
    position: absolute;
    left: 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.button.pulse {
    animation: pulse 2s infinite;
    display: inline-block;
    padding: 12px 30px;
    margin-top: 1rem;
    font-weight: 600;
}