/* ========== Course Selection Section ========== */
.course-selection-section {
    padding: var(--space-12) 0;
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.course-selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin: var(--space-8) 0;
}

.course-selection-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.course-selection-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.course-selection-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.15);
    border-color: var(--color-primary);
}

.course-selection-card:hover::before {
    transform: scaleX(1);
}

.course-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.course-badge-beginner {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    color: var(--color-bg-primary);
}

.course-badge-advanced {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-bg-primary);
}

.course-badge i {
    margin-right: var(--space-1);
}

.course-selection-card h3 {
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.3;
}

.course-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.course-features {
    list-style: none;
    padding: 0;
    margin: var(--space-4) 0;
}

.course-features li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding: var(--space-2) 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.course-features i {
    color: var(--color-success);
    font-size: 1rem;
}

.course-price {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 2px solid var(--color-border);
    text-align: center;
}

.price-amount {
    display: block;
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: var(--space-1);
}

.price-vat {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
}

/* Bundle Banner */
.bundle-banner {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    padding: var(--space-8);
    border-radius: var(--radius-xl);
    margin: var(--space-10) 0 var(--space-8) 0;
    border: 2px solid var(--color-primary);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.15);
    position: relative;
    overflow: hidden;
}

.bundle-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

.bundle-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(245, 158, 11, 0.3);
}

.bundle-icon i {
    font-size: 2rem;
    color: var(--color-bg-primary);
}

.bundle-content {
    flex: 1;
}

.bundle-content h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.bundle-content h3 i {
    color: var(--color-accent);
    margin-right: var(--space-2);
}

.bundle-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.bundle-price .original-price {
    text-decoration: line-through;
    color: var(--color-text-tertiary);
    font-size: 1.125rem;
}

.bundle-price .highlight-price {
    color: var(--color-accent);
    font-size: 1.75rem;
    font-weight: 900;
    text-decoration: underline;
    text-decoration-color: var(--color-accent);
    text-decoration-thickness: 3px;
}

.bundle-price i {
    color: var(--color-primary);
    font-size: 1rem;
}

.bundle-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Course Selection CTA */
.course-selection-cta {
    text-align: center;
    margin-top: var(--space-8);
}

.cta-highlight {
    font-size: 1.125rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    line-height: 1.6;
}

.cta-highlight i {
    color: var(--color-accent);
    margin-right: var(--space-2);
}

.btn-xl {
    padding: var(--space-4) var(--space-10);
    font-size: 1.25rem;
    font-weight: 800;
}

.cta-subtext {
    margin-top: var(--space-3);
    font-size: 0.9375rem;
    color: var(--color-text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
    .course-selection-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .course-selection-card {
        padding: var(--space-5);
    }

    .course-selection-card h3 {
        font-size: 1.25rem;
    }

    .price-amount {
        font-size: 1.5rem;
    }

    .bundle-banner {
        flex-direction: column;
        text-align: center;
        padding: var(--space-6);
    }

    .bundle-icon {
        width: 60px;
        height: 60px;
    }

    .bundle-icon i {
        font-size: 1.5rem;
    }

    .bundle-content h3 {
        font-size: 1.25rem;
    }

    .bundle-price {
        font-size: 1rem;
        justify-content: center;
    }

    .bundle-price .highlight-price {
        font-size: 1.5rem;
    }

    .btn-xl {
        padding: var(--space-3) var(--space-6);
        font-size: 1.125rem;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .course-selection-section {
        padding: var(--space-8) 0;
    }

    .course-selection-card {
        padding: var(--space-4);
    }

    .bundle-banner {
        padding: var(--space-4);
    }

    .bundle-price {
        flex-direction: column;
        gap: var(--space-2);
    }
}