/* =========================================
   CASE STUDY PAGE STYLES
   Premium brand-driven case study pages
   ========================================= */

.case-study-page {
    background: var(--bg);
}

/* --- BACK NAVIGATION --- */
.case-nav {
    position: fixed;
    top: 2rem;
    left: 2rem;
    z-index: 100;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    color: var(--text-muted);
    font-size: 0.75rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

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

.back-link svg {
    transition: transform 0.3s;
}

.back-link:hover svg {
    transform: translateX(-3px);
}

/* --- HERO SECTION --- */
.case-hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: flex-end;
    padding-bottom: 6rem;
    overflow: hidden;
}

.case-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    transform: scale(1.1);
    animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    0% { transform: scale(1.1); }
    100% { transform: scale(1.15); }
}

.case-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(5, 5, 5, 1) 0%,
        rgba(5, 5, 5, 0.8) 30%,
        rgba(5, 5, 5, 0.4) 60%,
        rgba(5, 5, 5, 0.2) 100%
    );
}

.case-hero-content {
    position: relative;
    z-index: 10;
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
}

.case-category {
    display: block;
    color: var(--accent);
    margin-bottom: 1rem;
    letter-spacing: 0.15em;
    font-size: 0.8rem;
}

.case-title {
    font-family: var(--font-sans);
    font-size: clamp(4rem, 12vw, 12rem);
    font-weight: 800;
    line-height: 0.85;
    letter-spacing: -0.04em;
    text-transform: uppercase;
    color: #fff;
    margin-bottom: 1rem;
}

.case-tagline {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 40ch;
    font-weight: 300;
}

/* --- PROJECT INFO GRID --- */
.case-info {
    padding: 4rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.case-info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.case-info-item span {
    display: block;
    color: var(--accent);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.case-info-item p {
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 400;
}

/* --- SECTIONS --- */
.case-section {
    padding: 6rem 0;
}

.case-section-alt {
    background: rgba(255, 255, 255, 0.02);
}

/* --- TEXT BLOCKS --- */
.case-text-block {
    max-width: 800px;
}

.case-text-block h2 {
    font-family: var(--font-sans);
    font-size: 2rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    color: #fff;
    margin-bottom: 1.5rem;
}

.case-text-block p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 300;
}

/* --- PROCESS SECTION --- */
.process-header {
    margin-bottom: 3rem;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.process-step {
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    transition: border-color 0.3s, transform 0.3s;
    background: rgba(255, 255, 255, 0.02);
}

.process-step:hover {
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.process-number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.4;
    margin-bottom: 1rem;
}

.process-step h3 {
    font-family: var(--font-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
}

.process-step p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-muted);
    font-weight: 300;
}

/* --- FULL WIDTH IMAGE --- */
.case-fullwidth-image {
    width: 100%;
    margin: 4rem 0;
    overflow: hidden;
}

.case-fullwidth-image img {
    width: 100%;
    height: 70vh;
    object-fit: cover;
}

/* Image placeholder for when no image is available */
.image-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.case-fullwidth-image .image-placeholder {
    height: 70vh;
}

/* --- GALLERY GRID --- */
.case-gallery {
    padding: 4rem 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.gallery-item {
    overflow: hidden;
    border-radius: 4px;
    background: #0a0a0a;
}

.gallery-item img,
.gallery-item .image-placeholder {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 4/3;
    transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.gallery-item:hover img {
    transform: scale(1.05);
}

.gallery-item.large {
    grid-column: span 2;
    grid-row: span 2;
}

.gallery-item.large img,
.gallery-item.large .image-placeholder {
    aspect-ratio: auto;
    height: 100%;
    min-height: 400px;
}

/* --- RESULTS SECTION --- */
.case-results {
    padding: 6rem 0;
}

.results-metrics {
    display: flex;
    gap: 4rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-number {
    font-family: var(--font-sans);
    font-size: 4rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.metric-label {
    font-family: var(--font-mono);
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- NEXT PROJECT --- */
.case-next {
    padding: 8rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.next-project-link {
    display: block;
    margin-top: 2rem;
    text-decoration: none;
    transition: opacity 0.3s;
}

.next-project-link:hover {
    opacity: 0.8;
}

.next-project-link h2 {
    font-family: var(--font-sans);
    font-size: clamp(3rem, 10vw, 8rem);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.04em;
    color: #fff;
    transition: color 0.3s;
    line-height: 1;
    margin-bottom: 1rem;
}

.next-project-link:hover h2 {
    color: var(--accent);
}

.next-project-link span {
    color: var(--text-muted);
    transition: color 0.3s;
}

.next-project-link:hover span {
    color: var(--accent);
}

/* --- FOOTER --- */
.case-footer {
    padding: 4rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.case-footer a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s;
}

.case-footer a:hover {
    color: var(--accent);
}

/* --- UTILITY CLASSES --- */
.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
}

.text-center {
    text-align: center;
}

.flex {
    display: flex;
}

.justify-center {
    justify-content: center;
}

.gap-8 {
    gap: 2rem;
}

.opacity-50 {
    opacity: 0.5;
}

.text-sm {
    font-size: 0.875rem;
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
    .case-info-grid,
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery-item.large {
        grid-column: span 2;
        grid-row: span 1;
    }
}

@media (max-width: 768px) {
    .case-nav {
        top: auto;
        bottom: 2rem;
        left: 50%;
        transform: translateX(-50%);
    }

    .case-hero {
        height: 80vh;
        padding-bottom: 4rem;
    }

    .case-title {
        font-size: clamp(3rem, 15vw, 6rem);
    }

    .case-tagline {
        font-size: 1rem;
    }

    .case-info-grid,
    .process-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .process-step {
        padding: 1.5rem;
    }

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

    .gallery-item.large {
        grid-column: span 1;
    }

    .gallery-item.large .image-placeholder {
        min-height: 250px;
    }

    .results-metrics {
        flex-direction: column;
        gap: 2rem;
    }

    .metric-number {
        font-size: 3rem;
    }

    .case-section {
        padding: 4rem 0;
    }

    .case-next {
        padding: 5rem 0;
    }

    .next-project-link h2 {
        font-size: clamp(2.5rem, 12vw, 5rem);
    }

    .case-text-block h2 {
        font-size: 1.5rem;
    }

    .case-text-block p {
        font-size: 1rem;
    }
}

/* --- SCROLL ANIMATIONS --- */
.animate-on-scroll {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.pending {
    opacity: 0;
    transform: translateY(30px);
}

.animate-on-scroll.in-view {
    opacity: 1;
    transform: translateY(0);
}