/* ==============================================
   Case Studies Section - Trust and Credibility
   ============================================== */

.case-studies {
    padding: var(--section-padding-y) 0;
    background-color: var(--bg-secondary);
}

.case-studies .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.case-studies .section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.case-studies .section-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.case-studies .section-header p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.case-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.case-logo {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-logo svg {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
}

.case-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.case-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-lg);
}

.case-metrics {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-light);
}

.case-metrics span:first-child {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--accent);
}

.case-metrics span:last-child {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==============================================
   Responsive Design
   ============================================== */
@media (max-width: 768px) {
    .case-studies {
        padding: var(--section-padding-y-mobile) 0;
    }
    
    .case-studies .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .case-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .case-card {
        padding: var(--spacing-xl);
    }
}

/* ==============================================
   Animation
   ============================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.case-card {
    animation: fadeInUp 0.6s ease-out forwards;
}

.case-card:nth-child(2) {
    animation-delay: 0.1s;
}

.case-card:nth-child(3) {
    animation-delay: 0.2s;
}