/* ============================================
   CASE STUDIES SECTION
   ============================================ */

.case-studies-section {
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fb 50%, #ffffff 100%);
    padding: 8rem 5%;
    position: relative;
    overflow: hidden;
}

.case-studies-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(14, 165, 233, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.03) 0%, transparent 50%);
    pointer-events: none;
}

.case-studies-section__container {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.case-studies-section__header {
    text-align: center;
    margin-bottom: 1rem;
}

.case-studies-section__title {
    font-size: clamp(2.5rem, 5vw, 3.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.case-studies-section__subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto 4rem;
    line-height: 1.6;
}

.case-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

@media (min-width: 1024px) {
    .case-studies-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1023px) and (min-width: 768px) {
    .case-studies-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .case-studies-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}


/* ============================================
   CASE STUDY CARD
   ============================================ */

.case-study-card {
    background: var(--bg-white);
    border-radius: var(--radius-2xl);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-smooth);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    position: relative;
    border: 1px solid rgba(148, 163, 184, 0.1);
    overflow: hidden;
}

.case-study-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--gradient-start) 0%, 
        var(--gradient-mid) 50%, 
        var(--gradient-end) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.case-study-card:hover::before {
    opacity: 1;
}

.case-study-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(99, 102, 241, 0.12);
    border-color: rgba(99, 102, 241, 0.15);
}


/* ============================================
   INSTITUTION LOGO & INFO
   ============================================ */

.case-study-card__logo-container {
    background: linear-gradient(135deg, 
        rgba(14, 165, 233, 0.04) 0%, 
        rgba(99, 102, 241, 0.04) 100%);
    border-radius: var(--radius-md);
    padding: 4rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 225px;
    border: 1px solid rgba(148, 163, 184, 0.08);
    position: relative;
    overflow: hidden;
}

.case-study-card__logo-container::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(14, 165, 233, 0.08), 
        rgba(99, 102, 241, 0.08));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.case-study-card:hover .case-study-card__logo-container::before {
    opacity: 1;
}

.case-study-card__logo-placeholder {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: 0.02em;
}

.case-study-card__institution {
    text-align: center;
}

.case-study-card__institution-name {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    letter-spacing: -0.01em;
}

.case-study-card__institution-type {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}


/* ============================================
   CHALLENGE, SOLUTION, OUTCOME BLOCKS
   ============================================ */

.case-study-card__section {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.case-study-card__section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.case-study-card__icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.case-study-card__icon svg {
    width: 20px;
    height: 20px;
}

.case-study-card__label {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    background: linear-gradient(135deg, 
        var(--gradient-start) 0%, 
        var(--gradient-mid) 50%, 
        var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.case-study-card__text {
    font-size: 0.9375rem;
    line-height: 1.65;
    color: var(--text-secondary);
    font-weight: 400;
}


/* ============================================
   OUTCOME - SPECIAL STYLING
   ============================================ */

.case-study-card__outcome {
    background: linear-gradient(135deg, 
        rgba(14, 165, 233, 0.04) 0%, 
        rgba(99, 102, 241, 0.04) 100%);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-top: 0.5rem;
    border: 1px solid rgba(99, 102, 241, 0.08);
}

.case-study-card__metric {
    font-size: 2.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, 
        var(--gradient-start) 0%, 
        var(--gradient-mid) 50%, 
        var(--gradient-end) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.case-study-card__metric-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.5;
}


/* ============================================
   CTA LINK
   ============================================ */

.case-study-card__cta {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
}

.case-study-card__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--gradient-mid);
    text-decoration: none;
    transition: all var(--transition-base);
    position: relative;
}

.case-study-card__link::after {
    content: '→';
    transition: transform var(--transition-base);
}

.case-study-card__link:hover {
    color: var(--gradient-end);
    gap: 0.75rem;
}

.case-study-card__link:hover::after {
    transform: translateX(4px);
}


/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 968px) {
    .case-studies-section {
        padding: 6rem 5%;
    }
    
    .case-study-card {
        padding: 2rem 1.5rem;
    }
    
    .case-study-card__metric {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .case-studies-section {
        padding: 5rem 5%;
    }
    
    .case-studies-section__subtitle {
        font-size: 1rem;
    }
    
    .case-study-card__institution-name {
        font-size: 1.25rem;
    }
    
    .case-study-card__metric {
        font-size: 1.75rem;
    }
}