/* ==========================================================================
   CASE STUDY DETAIL SPECIFIC STYLES
   ========================================================================== */

/* 1. Hero Section */
.csd-hero {
    background: radial-gradient(circle at 80% 20%, rgba(0, 71, 255, 0.15), transparent 50%), 
                radial-gradient(circle at 20% 80%, rgba(0, 71, 255, 0.05), transparent 50%), 
                var(--color-secondary);
    color: var(--color-bg-white);
    padding: var(--spacing-12) 0 var(--spacing-16);
    overflow: hidden;
}

.csd-hero__inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--spacing-12);
    align-items: center;
}

@media (max-width: 991px) {
    .csd-hero__inner {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
}

.csd-hero__content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

/* Breadcrumbs in Hero */
.csd-breadcrumbs {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.csd-breadcrumbs a {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

.csd-breadcrumbs a:hover {
    color: var(--color-bg-white);
}

.csd-breadcrumbs i {
    font-size: 0.75rem;
}

/* Tag Badge */
.csd-hero-tag {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(0, 71, 255, 0.2);
    border: 1px solid rgba(0, 71, 255, 0.3);
    color: #00D2FF;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-4);
}

.csd-hero__title {
    font-size: clamp(2.5rem, 4.5vw, 3.25rem);
    color: var(--color-bg-white);
    margin-bottom: var(--spacing-3);
    line-height: 1.15;
    font-family: var(--font-family-heading);
}

.csd-hero__title span.highlight {
    color: #00D2FF;
}

.csd-hero__description {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-8);
    line-height: 1.6;
}

/* Hero Stats Row */
.csd-hero-stats {
    display: flex;
    gap: var(--spacing-10);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-6);
    width: 100%;
}

.csd-hero-stat-item {
    display: flex;
    flex-direction: column;
}

.csd-hero-stat-val {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 4px;
}

.csd-hero-stat-lbl {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
}


/* Featured Image */
.csd-hero-visual {
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.csd-hero-img {
    width: 100%;
    height: auto;
    display: block;
}

/* 2. Main Content Split Layout */
.csd-main-section {
    background-color: var(--color-bg-white);
}

.csd-layout-grid {
    display: grid;
    grid-template-columns: 1.9fr 0.8fr;
    gap: var(--spacing-12);
    align-items: start;
}

@media (max-width: 991px) {
    .csd-layout-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-12);
    }
}

.csd-content-col {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-10);
}

.csd-section-block {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.csd-section-title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--color-text-dark);
    margin-bottom: 2px;
}

.csd-text {
    font-size: var(--font-size-base);
    color: var(--color-text-body);
    line-height: 1.7;
}

/* 3. Challenge List Details */
.csd-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    margin-top: var(--spacing-2);
}

.csd-list-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
    font-weight: 500;
}

.csd-list-item i {
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-top: 3px;
}

.csd-list-item.green i {
    color: var(--color-accent);
}

/* 4. Solution Feature Grid Cards */
.csd-solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
    margin-top: var(--spacing-4);
}

@media (max-width: 576px) {
    .csd-solution-grid {
        grid-template-columns: 1fr;
    }
}

.csd-solution-card {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    transition: all var(--transition-normal);
}

.csd-solution-card:hover {
    border-color: rgba(0, 71, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.csd-sol-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background-color: rgba(0, 71, 255, 0.08);
    color: var(--color-primary);
    font-size: 1.35rem;
}

.csd-sol-title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-dark);
}

.csd-sol-desc {
    font-size: var(--font-size-xs);
    color: var(--color-text-body);
    line-height: 1.5;
}

/* 5. Key Features checklist - 2 Columns */
.csd-features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-3) var(--spacing-6);
    margin-top: var(--spacing-2);
}

@media (max-width: 480px) {
    .csd-features-grid {
        grid-template-columns: 1fr;
    }
}

/* 6. Results Block - 4 columns stats cards */
.csd-results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-4);
    margin-top: var(--spacing-2);
}

@media (max-width: 768px) {
    .csd-results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-4);
    }
}
@media (max-width: 480px) {
    .csd-results-grid {
        grid-template-columns: 1fr;
    }
}

.csd-result-card {
    background-color: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    transition: all var(--transition-normal);
}

.csd-result-card:hover {
    border-color: rgba(0, 230, 118, 0.3);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.csd-res-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(0, 230, 118, 0.08);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.csd-result-card:nth-child(4) .csd-res-icon {
    background-color: rgba(0, 71, 255, 0.08);
    color: var(--color-primary);
}

.csd-res-content {
    display: flex;
    flex-direction: column;
}

.csd-res-val {
    font-size: var(--font-size-base);
    font-weight: 800;
    color: var(--color-text-dark);
    line-height: 1.1;
    margin-bottom: 2px;
}

.csd-res-lbl {
    font-size: 0.65rem;
    color: var(--color-text-light);
    font-weight: 600;
}

/* 7. Gallery Showcase Layout Grid */
.csd-gallery-showcase {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-4);
    margin-top: var(--spacing-2);
}

@media (max-width: 768px) {
    .csd-gallery-showcase {
        grid-template-columns: 1fr;
    }
}

.csd-gallery-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    cursor: zoom-in;
    position: relative;
}

.csd-gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-normal);
}

.csd-gallery-item:hover img {
    transform: scale(1.03);
}

/* Right-side 2x2 grid */
.csd-gallery-subgrid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
}

/* Overlay overlay */
.csd-gallery-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 71, 255, 0.08);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
}

.csd-gallery-item:hover::after {
    opacity: 1;
}

/* 8. Testimonial Card */
.csd-testimonial-card {
    background: radial-gradient(circle at 10% 10%, rgba(0, 71, 255, 0.05), transparent 40%),
                var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-8) var(--spacing-10);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
    position: relative;
}

@media (max-width: 576px) {
    .csd-testimonial-card {
        padding: var(--spacing-6) var(--spacing-4);
    }
}

.csd-testimonial-quote-icon {
    font-size: 2.2rem;
    color: var(--color-primary);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: -10px;
}

.csd-testimonial-text {
    font-size: var(--font-size-base);
    font-style: italic;
    color: var(--color-text-dark);
    line-height: 1.6;
    font-weight: 500;
}

.csd-testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
}

.csd-author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--color-primary);
}

.csd-author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.csd-author-info {
    display: flex;
    flex-direction: column;
}

.csd-author-name {
    font-size: var(--font-size-base);
    font-weight: 800;
    color: var(--color-text-dark);
}

.csd-author-company {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    font-weight: 600;
}

/* 9. Sidebar summary card */
.csd-sidebar-card {
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6) var(--spacing-8);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    position: sticky;
    top: 100px;
}

.csd-sidebar-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-text-dark);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--spacing-3);
    margin-bottom: -5px;
}

.csd-sidebar-card h4 {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-2);
}

/* Project Info table */
.csd-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.csd-info-row {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
}

.csd-info-row strong {
    color: var(--color-text-dark);
}

/* Tech icon badges */
.csd-tech-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
    padding: var(--spacing-2) 0;
}

.csd-tech-icon {
    font-size: 2rem;
    color: var(--color-text-light);
    transition: all var(--transition-fast);
}

/* Colorize hover logo badges */
.csd-tech-icon:hover {
    transform: scale(1.15);
}

.csd-tech-icon.wordpress:hover { color: #21759b; }
.csd-tech-icon.php:hover { color: #777bb4; }
.csd-tech-icon.mysql:hover { color: #00758f; }
.csd-tech-icon.bootstrap:hover { color: #7952b3; }

/* Bullet list services */
.csd-services-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.csd-service-item {
    font-size: var(--font-size-sm);
    color: var(--color-text-body);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.csd-service-item::before {
    content: '';
    width: 5px;
    height: 5px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.csd-visit-btn {
    width: 100%;
    background-color: var(--color-primary);
    color: var(--color-bg-white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    box-shadow: 0 4px 12px rgba(0, 71, 255, 0.25);
}

.csd-visit-btn:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 71, 255, 0.35);
}

/* 10. Related projects header */
.csd-related-section {
    background-color: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
}

/* 11. Fullscreen Lightbox Overlay */
.csd-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.csd-lightbox.active {
    display: flex;
    opacity: 1;
}

.csd-lightbox-content {
    max-width: 90%;
    max-height: 80%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.csd-lightbox-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.3s ease-out;
}

@keyframes zoomIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.csd-lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.csd-lightbox-close:hover {
    background: #ff3b30;
    transform: rotate(90deg);
}

/* Navigation controls */
.csd-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
}

.csd-lightbox-nav:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: 0 0 15px rgba(0, 71, 255, 0.4);
}

.csd-lightbox-nav.prev {
    left: -70px;
}

.csd-lightbox-nav.next {
    right: -70px;
}

/* Hide navigation on smaller viewports */
@media (max-width: 991px) {
    .csd-lightbox-nav {
        width: 38px;
        height: 38px;
        font-size: 1.2rem;
    }
    .csd-lightbox-nav.prev { left: -45px; }
    .csd-lightbox-nav.next { right: -45px; }
}
@media (max-width: 576px) {
    .csd-lightbox-nav {
        display: none;
    }
    .csd-lightbox-close {
        top: -45px;
        right: 10px;
    }
}