/* ============================================
   CASE STUDY PAGE STYLES
   Extends the main design system
   ============================================ */

/* ============================================
   CASE STUDY HERO
   ============================================ */
.cs-hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: calc(var(--header-height) + var(--space-xl)) var(--space-lg) var(--space-2xl);
    background: var(--cloud-dancer);
    position: relative;
}

.cs-hero-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    width: 100%;
}

.cs-back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-sm);
    color: var(--ink-muted);
    margin-bottom: var(--space-xl);
    transition: all var(--duration-normal) var(--ease-out-expo);
    opacity: 0;
    transform: translateX(-20px);
}

.cs-back-link:hover {
    color: var(--accent);
    transform: translateX(-5px);
}

.cs-back-link svg {
    transition: transform var(--duration-normal) var(--ease-out-expo);
}

.cs-back-link:hover svg {
    transform: translateX(-5px);
}

.cs-hero-content {
    margin-bottom: var(--space-2xl);
}

.cs-category {
    display: inline-block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: var(--space-sm);
    opacity: 0;
    transform: translateY(20px);
}

.cs-title {
    font-family: var(--font-sans);
    font-size: var(--text-3xl);
    font-weight: 500;
    letter-spacing: -0.03em;
    color: var(--ink);
    margin-bottom: var(--space-sm);
    opacity: 0;
    transform: translateY(30px);
}

.cs-subtitle {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-style: italic;
    color: var(--ink-muted);
    opacity: 0;
    transform: translateY(20px);
}

.cs-live-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--space-md);
    padding: 0.75rem 1.25rem;
    background: var(--ink);
    color: var(--cloud-dancer);
    border-radius: 8px;
    font-size: var(--text-sm);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--duration-normal) var(--ease-out-expo);
    opacity: 0;
    transform: translateY(20px);
}

.cs-live-link:hover {
    background: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.cs-live-link svg {
    transition: transform var(--duration-normal) var(--ease-out-expo);
}

.cs-live-link:hover svg {
    transform: translate(2px, -2px);
}

/* Dark mode live link */
[data-theme="dark"] .cs-live-link {
    background: var(--cloud-dancer);
    color: var(--ink);
}

[data-theme="dark"] .cs-live-link:hover {
    background: var(--mint);
}

.cs-hero-image {
    width: 100%;
    opacity: 0;
    transform: translateY(40px);
}

.cs-hero-image-placeholder {
    width: 100%;
    height: 400px;
    background: var(--ink-faint);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.cs-hero-project-name {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--cloud-dancer);
    opacity: 0.8;
}

.cs-hero-image-img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

/* ============================================
   PROJECT DETAILS BAR
   ============================================ */
.cs-details-bar {
    padding: var(--space-xl) var(--space-lg);
    background: var(--cloud-dancer-light);
    border-top: 1px solid var(--cloud-warm);
    border-bottom: 1px solid var(--cloud-warm);
}

.cs-details-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.cs-detail {
    opacity: 0;
    transform: translateY(20px);
}

.cs-detail-label {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-faint);
    margin-bottom: var(--space-xs);
}

.cs-detail-value {
    display: block;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--ink);
}

/* ============================================
   CASE STUDY SECTIONS
   ============================================ */
.cs-section {
    padding: var(--space-3xl) var(--space-lg);
    background: var(--cloud-dancer);
}

.cs-section--alt {
    background: var(--cloud-dancer-light);
}

.cs-section--dark {
    background: var(--ink);
}

.cs-section--dark .section-label {
    color: var(--ink-faint);
}

.cs-section--dark .cs-section-title {
    color: var(--cloud-dancer);
}

.cs-section-inner {
    max-width: 900px;
    margin: 0 auto;
}

.cs-section-header {
    margin-bottom: var(--space-xl);
}

.cs-section-title {
    font-family: var(--font-sans);
    font-size: var(--text-2xl);
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--ink);
    opacity: 0;
    transform: translateY(30px);
}

.cs-section-content {
    opacity: 0;
    transform: translateY(30px);
}

.cs-section-content p {
    font-size: var(--text-base);
    line-height: 1.8;
    color: var(--ink-soft);
    margin-bottom: var(--space-md);
}

.cs-section-content p:last-child {
    margin-bottom: 0;
}

.cs-lead {
    font-size: var(--text-lg);
    color: var(--ink);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

.cs-lead--light {
    color: var(--cloud-dancer);
}

/* Dark section text colors */
.cs-section--dark .cs-section-content p {
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   CHALLENGES GRID
   ============================================ */
.cs-challenges-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.cs-challenge-item {
    padding: var(--space-lg);
    background: var(--cloud-dancer);
    border: 1px solid var(--cloud-warm);
    border-radius: 16px;
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-challenge-item:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.cs-challenge-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pale-sage);
    border-radius: 12px;
    color: var(--ink);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-challenge-item:hover .cs-challenge-icon {
    background: var(--accent);
    color: var(--cloud-dancer);
}

.cs-challenge-item h3 {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--ink);
    margin-bottom: var(--space-xs);
}

.cs-challenge-item p {
    font-size: var(--text-sm);
    color: var(--ink-muted);
    line-height: 1.6;
    margin-bottom: 0;
}

.cs-goal {
    font-size: var(--text-base);
    font-style: italic;
    color: var(--ink-soft);
    padding: var(--space-lg);
    background: var(--cloud-dancer);
    border-left: 3px solid var(--accent);
    border-radius: 0 12px 12px 0;
    margin-top: var(--space-xl);
}

/* ============================================
   ROLE GRID
   ============================================ */
.cs-role-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.cs-role-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--cloud-dancer-light);
    border: 1px solid var(--cloud-warm);
    border-radius: 16px;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-role-item:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.cs-role-number {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--accent);
    flex-shrink: 0;
}

.cs-role-content h3 {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--ink);
    margin-bottom: var(--space-xs);
}

.cs-role-content p {
    font-size: var(--text-sm);
    color: var(--ink-muted);
    line-height: 1.6;
    margin-bottom: 0;
}

/* ============================================
   APPROACH SECTION
   ============================================ */
.cs-approach-principle {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.cs-principle-text {
    font-size: var(--text-lg);
    color: var(--ink-soft);
    margin-bottom: var(--space-md);
}

.cs-quote {
    font-family: var(--font-serif);
    font-size: var(--text-xl);
    font-style: italic;
    color: var(--ink);
    padding: 0;
    margin: 0;
    border: none;
}

.cs-approach-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.cs-approach-item {
    padding: var(--space-lg);
    background: var(--cloud-dancer);
    border: 1px solid var(--cloud-warm);
    border-radius: 16px;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-approach-item:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.cs-approach-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pale-sage);
    border-radius: 14px;
    color: var(--ink);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-approach-item:hover .cs-approach-icon {
    background: var(--accent);
    color: var(--cloud-dancer);
}

.cs-approach-item h3 {
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--ink);
    margin-bottom: var(--space-xs);
}

.cs-approach-item p {
    font-size: var(--text-sm);
    color: var(--ink-muted);
    line-height: 1.6;
    margin-bottom: 0;
}

.cs-approach-note {
    text-align: center;
    font-style: italic;
    color: var(--ink-muted);
}

/* ============================================
   OUTCOMES SECTION
   ============================================ */
.cs-outcomes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.cs-outcome-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-outcome-item:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent);
    transform: translateY(-3px);
}

.cs-outcome-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--sage);
    border-radius: 10px;
    color: var(--cloud-dancer);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-outcome-item:hover .cs-outcome-icon {
    background: var(--mint);
    transform: scale(1.05);
}

.cs-outcome-item h3 {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--cloud-dancer);
    margin-bottom: var(--space-xs);
}

.cs-outcome-item p {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 0;
}

.cs-outcome-note {
    text-align: center;
    font-style: italic;
    color: rgba(255, 255, 255, 0.6);
    margin-top: var(--space-lg);
}

/* ============================================
   METRICS GRID
   ============================================ */
.cs-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.cs-metric-item {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: var(--space-lg);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-metric-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
}

.cs-metric-number {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    color: var(--mint);
    line-height: 1.1;
    margin-bottom: var(--space-xs);
}

.cs-metric-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-xs);
}

.cs-metric-detail {
    display: block;
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive metrics grid */
@media (max-width: 1024px) {
    .cs-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .cs-metrics-grid {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .cs-metric-item {
        padding: var(--space-md);
    }

    .cs-metric-number {
        font-size: 2rem;
    }
}

/* ============================================
   NEXT PROJECT CTA
   ============================================ */
.cs-next {
    padding: var(--space-2xl) var(--space-lg);
    background: var(--cloud-dancer-light);
    border-top: 1px solid var(--cloud-warm);
}

.cs-next-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    text-align: center;
}

.cs-next-label {
    display: block;
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-muted);
    margin-bottom: var(--space-md);
}

.cs-next-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-md);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-next-link:hover {
    transform: translateX(10px);
}

.cs-next-title {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--ink);
    transition: color var(--duration-normal) var(--ease-out-expo);
}

.cs-next-link:hover .cs-next-title {
    color: var(--accent);
}

.cs-next-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--ink);
    border-radius: 50%;
    color: var(--cloud-dancer);
    transition: all var(--duration-normal) var(--ease-out-expo);
}

.cs-next-link:hover .cs-next-arrow {
    background: var(--accent);
    transform: translate(5px, -5px);
}

.cs-next-desc {
    font-size: var(--text-sm);
    color: var(--ink-muted);
    margin-top: var(--space-xs);
}

/* ============================================
   RESPONSIVE STYLES
   ============================================ */
@media (max-width: 1024px) {
    .cs-details-inner {
        grid-template-columns: repeat(2, 1fr);
    }

    .cs-challenges-grid {
        grid-template-columns: 1fr;
    }

    .cs-role-grid {
        grid-template-columns: 1fr;
    }

    .cs-approach-grid {
        grid-template-columns: 1fr;
    }

    .cs-outcomes-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .cs-hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + var(--space-lg));
        padding-bottom: var(--space-xl);
    }

    .cs-hero-image-placeholder {
        height: 250px;
    }

    .cs-details-inner {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .cs-section {
        padding: var(--space-2xl) var(--space-md);
    }

    .cs-title {
        font-size: var(--text-2xl);
    }

    .cs-next-link {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .cs-next-link:hover {
        transform: translateY(-5px);
    }
}

@media (max-width: 480px) {
    .cs-hero {
        padding-left: var(--space-md);
        padding-right: var(--space-md);
    }

    .cs-challenge-item,
    .cs-role-item,
    .cs-approach-item,
    .cs-outcome-item {
        padding: var(--space-md);
    }
}

/* Small mobile (375px and below) */
@media (max-width: 375px) {
    .cs-hero {
        padding: calc(var(--header-height) + var(--space-lg)) var(--space-sm) var(--space-lg);
    }

    .cs-title {
        font-size: clamp(1.5rem, 7vw, 2rem);
    }

    .cs-subtitle {
        font-size: var(--text-sm);
    }

    .cs-details-bar {
        padding: var(--space-md) var(--space-sm);
    }

    .cs-detail-value {
        font-size: var(--text-sm);
    }

    .cs-section {
        padding: var(--space-xl) var(--space-sm);
    }

    .cs-section-title {
        font-size: clamp(1.25rem, 5vw, 1.5rem);
    }

    .cs-section-content p {
        font-size: var(--text-sm);
    }

    .cs-challenge-item,
    .cs-role-item,
    .cs-approach-item,
    .cs-outcome-item {
        padding: var(--space-sm);
    }

    .cs-item-number {
        width: 32px;
        height: 32px;
        font-size: var(--text-xs);
    }

    .cs-item-title {
        font-size: var(--text-sm);
    }

    .cs-item-text {
        font-size: var(--text-xs);
    }

    .cs-next-project {
        padding: var(--space-lg) var(--space-sm);
    }

    .cs-next-title {
        font-size: clamp(1.25rem, 5vw, 1.5rem);
    }

    .cs-next-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ============================================
   DARK MODE SUPPORT
   ============================================ */
[data-theme="dark"] .cs-hero {
    background: var(--cloud-dancer);
}

[data-theme="dark"] .cs-back-link {
    color: var(--ink-muted);
}

[data-theme="dark"] .cs-back-link:hover {
    color: var(--accent);
}

[data-theme="dark"] .cs-category {
    color: var(--accent);
}

[data-theme="dark"] .cs-title {
    color: var(--ink);
}

[data-theme="dark"] .cs-subtitle {
    color: var(--ink-muted);
}

[data-theme="dark"] .cs-hero-image-placeholder {
    background: var(--cloud-warm);
}

[data-theme="dark"] .cs-hero-project-name {
    color: var(--ink);
}

[data-theme="dark"] .cs-details-bar {
    background: var(--cloud-dancer-light);
    border-color: var(--cloud-warm);
}

[data-theme="dark"] .cs-detail-label {
    color: var(--ink-faint);
}

[data-theme="dark"] .cs-detail-value {
    color: var(--ink);
}

[data-theme="dark"] .cs-section {
    background: var(--cloud-dancer);
}

[data-theme="dark"] .cs-section--alt {
    background: var(--cloud-dancer-light);
}

[data-theme="dark"] .cs-section-title {
    color: var(--ink);
}

[data-theme="dark"] .cs-section-content p {
    color: var(--ink-soft);
}

[data-theme="dark"] .cs-lead {
    color: var(--ink);
}

/* Challenge items in dark mode */
[data-theme="dark"] .cs-challenge-item {
    background: var(--cloud-dancer-light);
    border-color: var(--cloud-warm);
}

[data-theme="dark"] .cs-challenge-icon {
    background: var(--cloud-warm);
    color: var(--ink);
}

[data-theme="dark"] .cs-challenge-item:hover .cs-challenge-icon {
    background: var(--accent);
    color: var(--cloud-dancer);
}

[data-theme="dark"] .cs-challenge-item h3 {
    color: var(--ink);
}

[data-theme="dark"] .cs-challenge-item p {
    color: var(--ink-muted);
}

[data-theme="dark"] .cs-goal {
    background: var(--cloud-dancer-light);
    color: var(--ink-soft);
    border-left-color: var(--accent);
}

/* Role items in dark mode */
[data-theme="dark"] .cs-role-item {
    background: var(--cloud-dancer-light);
    border-color: var(--cloud-warm);
}

[data-theme="dark"] .cs-role-number {
    color: var(--accent);
}

[data-theme="dark"] .cs-role-content h3 {
    color: var(--ink);
}

[data-theme="dark"] .cs-role-content p {
    color: var(--ink-muted);
}

/* Approach items in dark mode */
[data-theme="dark"] .cs-approach-item {
    background: var(--cloud-dancer-light);
    border-color: var(--cloud-warm);
}

[data-theme="dark"] .cs-approach-icon {
    background: var(--cloud-warm);
    color: var(--ink);
}

[data-theme="dark"] .cs-approach-item:hover .cs-approach-icon {
    background: var(--accent);
    color: var(--cloud-dancer);
}

[data-theme="dark"] .cs-approach-item h3 {
    color: var(--ink);
}

[data-theme="dark"] .cs-approach-item p {
    color: var(--ink-muted);
}

[data-theme="dark"] .cs-principle-text {
    color: var(--ink-soft);
}

[data-theme="dark"] .cs-quote {
    color: var(--ink);
}

[data-theme="dark"] .cs-approach-note {
    color: var(--ink-muted);
}

/* Dark section (outcomes) - keep as is since it's already dark */
[data-theme="dark"] .cs-section--dark {
    background: #151815;
}

[data-theme="dark"] .cs-section--dark .section-label {
    color: var(--ink-faint);
}

[data-theme="dark"] .cs-section--dark .cs-section-title {
    color: var(--cloud);
}

[data-theme="dark"] .cs-section--dark .cs-lead--light {
    color: var(--cloud-dancer);
}

[data-theme="dark"] .cs-section--dark .cs-section-content p {
    color: rgba(255, 255, 255, 0.8);
}

/* Next project CTA in dark mode */
[data-theme="dark"] .cs-next {
    background: var(--cloud-dancer-light);
    border-color: var(--cloud-warm);
}

[data-theme="dark"] .cs-next-label {
    color: var(--ink-muted);
}

[data-theme="dark"] .cs-next-title {
    color: var(--ink);
}

[data-theme="dark"] .cs-next-link:hover .cs-next-title {
    color: var(--accent);
}

[data-theme="dark"] .cs-next-arrow {
    background: var(--ink);
    color: var(--cloud-dancer);
}

[data-theme="dark"] .cs-next-link:hover .cs-next-arrow {
    background: var(--accent);
}