/* Case Studies Page Specific Styles */

/* Case Studies Hero */
.case-studies-hero {
    padding: var(--spacing-24) 0 var(--spacing-12);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    text-align: center;
}

.case-studies-hero h1 {
    color: var(--white);
    margin-bottom: var(--spacing-4);
    font-size: var(--font-size-5xl);
}

.case-studies-hero p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-xl);
    max-width: 600px;
    margin: 0 auto;
}

/* Filters Section */
.filters-section {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-8) 0;
    position: sticky;
    top: 80px;
    z-index: 100;
}

.filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-3) var(--spacing-6);
    border: 2px solid var(--gray-300);
    background: var(--white);
    color: var(--gray-700);
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: var(--font-size-sm);
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* Case Studies Grid */
.case-studies-grid {
    padding: var(--spacing-20) 0;
    background: var(--gray-50);
}

.case-studies-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-8);
}

/* Case Study Card */
.case-study-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    opacity: 1;
    transform: scale(1);
}

.case-study-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

.case-study-card.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

/* Case Study Image */
.case-study-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.case-study-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-study-metrics {
    text-align: center;
    color: var(--white);
}

.metric-number {
    display: block;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    line-height: 1;
}

.metric-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.case-study-category {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
    background: rgba(255, 255, 255, 0.9);
    color: var(--gray-800);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

/* Case Study Content */
.case-study-content {
    padding: var(--spacing-8);
}

.case-study-content h3 {
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-xl);
    color: var(--gray-900);
}

.case-study-industry {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-4);
}

.case-study-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-6);
    line-height: 1.6;
}

/* Case Study Details */
.case-study-details {
    margin-bottom: var(--spacing-6);
}

.detail-item {
    margin-bottom: var(--spacing-3);
    padding: var(--spacing-3);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.detail-item strong {
    color: var(--gray-900);
    display: block;
    margin-bottom: var(--spacing-1);
}

.detail-item:not(strong) {
    color: var(--gray-600);
    font-size: var(--font-size-sm);
}

/* Tech Tags */
.case-study-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
}

.tech-tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Case Study Link */
.case-study-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: gap 0.3s ease;
}

.case-study-link:hover {
    gap: var(--spacing-3);
}

/* Stats Section */
.stats-section {
    background: var(--white);
    padding: var(--spacing-20) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-8);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-6);
}

.stat-number {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-2);
    line-height: 1;
}

.stat-label {
    color: var(--gray-600);
    font-weight: 500;
    font-size: var(--font-size-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .case-studies-hero h1 {
        font-size: var(--font-size-4xl);
    }

    .filters-section {
        top: 70px;
        padding: var(--spacing-6) 0;
    }

    .filters {
        gap: var(--spacing-2);
    }

    .filter-btn {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-xs);
    }

    .case-studies-container {
        grid-template-columns: 1fr;
    }

    .case-study-content {
        padding: var(--spacing-6);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-6);
    }

    .stat-number {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 480px) {
    .filters {
        flex-direction: column;
        align-items: center;
    }

    .filter-btn {
        width: 100%;
        max-width: 200px;
    }

    .case-study-image {
        height: 150px;
    }

    .metric-number {
        font-size: var(--font-size-3xl);
    }

    .case-study-content {
        padding: var(--spacing-4);
    }

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

/* Animation for case study cards */
.case-study-card {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.case-study-card:nth-child(1) { animation-delay: 0.1s; }
.case-study-card:nth-child(2) { animation-delay: 0.2s; }
.case-study-card:nth-child(3) { animation-delay: 0.3s; }
.case-study-card:nth-child(4) { animation-delay: 0.4s; }
.case-study-card:nth-child(5) { animation-delay: 0.5s; }
.case-study-card:nth-child(6) { animation-delay: 0.6s; }

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

/* Filter animation */
.case-study-card {
    transition: all 0.4s ease;
}

.case-study-card.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
    position: absolute;
}

/* Enhanced hover effects */
.case-study-card:hover .case-study-image {
    transform: scale(1.05);
    transition: transform 0.3s ease;
}

.case-study-card:hover .case-study-link {
    color: var(--secondary-color);
}

/* Stats animation */
.stat-item {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.stat-item:nth-child(1) { animation-delay: 0.1s; }
.stat-item:nth-child(2) { animation-delay: 0.2s; }
.stat-item:nth-child(3) { animation-delay: 0.3s; }
.stat-item:nth-child(4) { animation-delay: 0.4s; }

/* Loading state */
.case-studies-container.loading {
    opacity: 0.5;
    pointer-events: none;
}

/* No results state */
.no-results {
    text-align: center;
    padding: var(--spacing-16);
    color: var(--gray-600);
}

.no-results h3 {
    margin-bottom: var(--spacing-4);
    color: var(--gray-800);
}

.no-results p {
    font-size: var(--font-size-lg);
}