/* ========================================
   Case Study Page Styles
======================================== */

/* Loading State */
.case-loading {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    color: var(--text-secondary);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error State */
.case-error {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.case-error h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.case-error p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.btn-back {
    display: inline-flex;
    padding: 1rem 2rem;
    background: var(--text-primary);
    color: var(--bg-primary);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: 4px;
    transition: opacity 0.2s;
}

.btn-back:hover {
    opacity: 0.8;
}

/* Case Hero */
.case-hero {
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: flex-end;
    position: relative;
    overflow: hidden;
}

.case-hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.case-hero-video video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(10, 10, 10, 0.2) 0%,
        rgba(10, 10, 10, 0.4) 50%,
        rgba(10, 10, 10, 0.95) 100%
    );
}

.case-hero-content {
    position: relative;
    z-index: 1;
    padding: 4rem;
    width: 100%;
    animation: fadeUp 1s var(--ease-out) 0.3s both;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    transition: color 0.3s;
}

.back-link svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s var(--ease-out);
}

.back-link:hover {
    color: var(--text-primary);
}

.back-link:hover svg {
    transform: translateX(-4px);
}

.case-meta {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.case-category,
.case-year {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.case-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.case-tagline {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* Case Overview */
.case-overview {
    padding: 8rem 4rem;
    border-bottom: 1px solid var(--border);
}

.overview-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 6rem;
}

.overview-main h2 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
}

.overview-main p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.overview-details {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.detail-item {
    border-left: 1px solid var(--border);
    padding-left: 1.5rem;
}

.detail-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.detail-value {
    font-size: 1rem;
    color: var(--text-primary);
}

/* Case Video Section */
.case-video-section {
    padding: 3rem 4rem;
    display: flex;
    justify-content: center;
}

.case-video-wrapper {
    position: relative;
    aspect-ratio: 16 / 9;
    width: 100%;
    max-width: 960px;
    overflow: hidden;
    border-radius: 12px;
    background: #000;
    cursor: pointer;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.case-video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
}

/* Play Button */
.case-video-wrapper .play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s var(--ease-out);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
}

.case-video-wrapper .play-button svg {
    width: 24px;
    height: 24px;
    color: var(--bg-primary);
    margin-left: 3px;
    transition: transform 0.2s var(--ease-out);
}

.case-video-wrapper .play-button:hover {
    transform: translate(-50%, -50%) scale(1.08);
    background: #fff;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.case-video-wrapper .play-button:hover svg {
    transform: scale(1.05);
}

/* When playing - fade out play button */
.case-video-wrapper.is-playing .play-button {
    opacity: 0;
    pointer-events: none;
}

.case-video-wrapper.is-playing:hover .play-button {
    opacity: 1;
    pointer-events: auto;
}

.case-video-wrapper.is-playing .play-button svg {
    margin-left: 0;
}

/* Video Controls */
.video-controls-container {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2.5rem 1.25rem 1rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.3) 60%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s var(--ease-out);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.case-video-wrapper:hover .video-controls-container,
.case-video-wrapper.is-playing .video-controls-container {
    opacity: 1;
}

.video-controls-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.video-play-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

.video-play-btn svg {
    width: 18px;
    height: 18px;
    fill: #fff;
    transition: transform 0.2s;
}

.video-play-btn:hover svg {
    transform: scale(1.1);
}

.video-volume-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.video-volume-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
}

.video-volume-btn svg {
    width: 18px;
    height: 18px;
    fill: rgba(255, 255, 255, 0.8);
    transition: fill 0.2s;
}

.video-volume-btn:hover svg {
    fill: #fff;
}

.video-volume-slider-wrapper {
    width: 0;
    overflow: hidden;
    transition: width 0.2s ease;
}

.video-volume-wrapper:hover .video-volume-slider-wrapper,
.video-volume-slider-wrapper:focus-within {
    width: 70px;
}

.video-volume-slider {
    width: 70px;
    height: 12px;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    cursor: pointer;
    outline: none;
    margin: 0;
    padding: 0;
}

.video-volume-slider::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, #fff var(--volume-percent, 100%), rgba(255, 255, 255, 0.25) var(--volume-percent, 100%));
    border-radius: 2px;
}

.video-volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    background: #fff;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
    margin-top: -4px;
    transition: transform 0.15s;
}

.video-volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.video-volume-slider::-moz-range-track {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 2px;
}

.video-volume-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.video-volume-slider::-moz-range-progress {
    height: 4px;
    background: #fff;
    border-radius: 2px;
}

.video-progress-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.video-progress-bar {
    flex: 1;
    height: 4px;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 2px;
    cursor: pointer;
    overflow: visible;
    position: relative;
    transition: height 0.15s;
}

.video-progress-bar:hover {
    height: 5px;
}

.video-progress-filled {
    height: 100%;
    background: #fff;
    border-radius: 2px;
    width: 0%;
    position: relative;
    transition: width 0.1s linear;
}

.video-progress-filled::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%) scale(0);
    width: 10px;
    height: 10px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.15s;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.video-progress-bar:hover .video-progress-filled::after {
    transform: translateY(-50%) scale(1);
}

.video-time {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.7rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    color: rgba(255, 255, 255, 0.7);
    flex-shrink: 0;
}

.video-time-divider {
    opacity: 0.5;
}

.video-current-time {
    color: #fff;
}

/* Case Section */
.case-section {
    padding: 8rem 4rem;
}

.case-section.alt {
    background: var(--bg-secondary);
}

.section-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    align-items: start;
}

.section-header {
    position: sticky;
    top: 8rem;
}

.case-section .section-number {
    margin-bottom: 1rem;
}

.case-section .section-title {
    margin-bottom: 0;
}

.section-text p {
    font-size: 1.125rem;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

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

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.result-item {
    text-align: center;
    padding: 1.5rem;
    position: relative;
}

.result-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 60%;
    background: var(--border);
}

.result-number {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.result-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-body {
    display: flex;
    flex-direction: column;
}

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

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

.gallery-item {
    overflow: hidden;
    border-radius: 4px;
}

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

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out);
}

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

/* Next Project */
.next-project {
    padding: 8rem 4rem;
    border-top: 1px solid var(--border);
}

.next-project-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: opacity 0.3s;
}

.next-project-link:hover {
    opacity: 0.7;
}

.next-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.next-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.next-project-link svg {
    width: 32px;
    height: 32px;
    transition: transform 0.3s var(--ease-out);
}

.next-project-link:hover svg {
    transform: translateX(8px);
}

/* ========================================
   Responsive Design
======================================== */

/* Tablet & small laptop */
@media (max-width: 1024px) {
    .case-hero-content,
    .case-overview,
    .case-video-section,
    .case-section,
    .case-gallery,
    .next-project {
        padding-left: 2rem;
        padding-right: 2rem;
    }
    
    .case-hero {
        min-height: 600px;
    }
    
    .case-hero-content {
        padding-bottom: 3rem;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .case-overview {
        padding-top: 5rem;
        padding-bottom: 5rem;
    }
    
    .section-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section-header {
        position: static;
    }
    
    .case-section {
        padding-top: 5rem;
        padding-bottom: 5rem;
    }
    
    .case-section .section-title {
        margin-bottom: 0;
    }
    
    .case-video-section {
        padding: 2rem;
    }
    
    .case-video-wrapper .play-button {
        width: 64px;
        height: 64px;
    }
    
    .case-video-wrapper .play-button svg {
        width: 22px;
        height: 22px;
    }
    
    .next-project {
        padding-top: 5rem;
        padding-bottom: 5rem;
    }
}

/* Tablet portrait and mobile */
@media (max-width: 768px) {
    /* Hero Section Mobile */
    .case-hero {
        height: auto;
        min-height: 100vh;
        min-height: 100dvh; /* Dynamic viewport height for mobile browsers */
    }
    
    .case-hero-content {
        padding: 6rem 1.5rem 3rem;
    }
    
    .back-link {
        margin-bottom: 2rem;
        padding: 0.5rem 0;
        font-size: 0.8rem;
        min-height: 44px;
        display: inline-flex;
        align-items: center;
    }
    
    .back-link svg {
        width: 18px;
        height: 18px;
    }
    
    .case-meta {
        gap: 1.25rem;
        margin-bottom: 1rem;
        flex-wrap: wrap;
    }
    
    .case-category,
    .case-year {
        font-size: 0.7rem;
        letter-spacing: 0.15em;
    }
    
    .case-title {
        font-size: clamp(2rem, 10vw, 2.75rem);
        margin-bottom: 1rem;
    }
    
    .case-tagline {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    /* Overview Section Mobile */
    .case-overview {
        padding: 3.5rem 1.5rem;
    }
    
    .overview-grid {
        gap: 2.5rem;
    }
    
    .overview-main h2 {
        font-size: 1.25rem;
        margin-bottom: 1.25rem;
    }
    
    .overview-main p {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .overview-details {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1.5rem;
    }
    
    .detail-item {
        padding-left: 1rem;
    }
    
    .detail-label {
        font-size: 0.7rem;
        letter-spacing: 0.1em;
    }
    
    .detail-value {
        font-size: 0.9rem;
    }
    
    /* Video Section Mobile */
    .case-video-section {
        padding: 1.5rem;
    }
    
    .case-video-wrapper {
        border-radius: 10px;
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    }
    
    .case-video-wrapper .play-button {
        width: 56px;
        height: 56px;
        box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25);
    }
    
    .case-video-wrapper .play-button svg {
        width: 18px;
        height: 18px;
        margin-left: 2px;
    }
    
    /* Video Controls Mobile */
    .video-controls-container {
        padding: 2rem 1rem 0.75rem;
        opacity: 1;
    }
    
    .video-controls-row {
        gap: 0.5rem;
    }
    
    .video-play-btn,
    .video-volume-btn {
        width: 36px;
        height: 36px;
        min-width: 44px;
        min-height: 44px;
    }
    
    .video-play-btn svg,
    .video-volume-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .video-progress-bar {
        height: 5px;
    }
    
    .video-time {
        font-size: 0.65rem;
    }
    
    /* Volume slider always visible on mobile for better touch UX */
    .video-volume-slider-wrapper {
        width: 50px;
    }
    
    .video-volume-slider {
        width: 50px;
    }
    
    /* Sections Mobile */
    .case-section {
        padding: 3.5rem 1.5rem;
    }
    
    .section-content {
        gap: 1.5rem;
    }
    
    .case-section .section-number {
        font-size: 0.7rem;
        margin-bottom: 0.75rem;
    }
    
    .case-section .section-title {
        font-size: 1.5rem;
    }
    
    .section-text p {
        font-size: 1rem;
        line-height: 1.75;
        margin-bottom: 1.25rem;
    }
    
    /* Gallery Mobile */
    .case-gallery {
        padding: 0 1.5rem;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .gallery-item.wide {
        grid-column: span 1;
    }
    
    .gallery-item {
        border-radius: 6px;
    }
    
    /* Results Grid Mobile */
    .results-grid {
        grid-template-columns: 1fr;
        gap: 0;
        margin-top: 2.5rem;
        padding: 2rem 0;
    }
    
    .result-item {
        text-align: left;
        padding: 1.25rem 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid var(--border);
    }
    
    .result-item:first-child {
        padding-top: 0;
    }
    
    .result-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    
    .result-item:not(:last-child)::after {
        display: none;
    }
    
    .result-number {
        font-size: 2rem;
        margin-bottom: 0;
        order: 2;
    }
    
    .result-label {
        font-size: 0.85rem;
        order: 1;
    }
    
    /* Next Project Mobile */
    .next-project {
        padding: 4rem 1.5rem;
    }
    
    .next-label {
        font-size: 0.7rem;
        letter-spacing: 0.15em;
    }
    
    .next-title {
        font-size: clamp(1.5rem, 7vw, 2.5rem);
        margin-bottom: 1rem;
    }
    
    .next-project-link svg {
        width: 24px;
        height: 24px;
    }
    
    /* Error & Loading States Mobile */
    .case-error {
        padding: 2rem 1.5rem;
    }
    
    .case-error h2 {
        font-size: 1.5rem;
    }
    
    .case-error p {
        font-size: 0.9rem;
    }
    
    .btn-back {
        padding: 0.875rem 1.75rem;
        font-size: 0.8rem;
        min-height: 44px;
    }
    
    .case-loading {
        gap: 1rem;
    }
    
    .case-loading p {
        font-size: 0.9rem;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .case-hero-content {
        padding: 5rem 1rem 2.5rem;
    }
    
    .back-link {
        font-size: 0.75rem;
        gap: 0.5rem;
    }
    
    .back-link svg {
        width: 16px;
        height: 16px;
    }
    
    .case-meta {
        gap: 1rem;
    }
    
    .case-category,
    .case-year {
        font-size: 0.65rem;
    }
    
    .case-title {
        font-size: 1.85rem;
    }
    
    .case-tagline {
        font-size: 0.9rem;
    }
    
    .case-overview {
        padding: 3rem 1rem;
    }
    
    .overview-main h2 {
        font-size: 1.15rem;
    }
    
    .overview-main p {
        font-size: 0.9rem;
    }
    
    .overview-details {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
    
    .case-video-section {
        padding: 1rem;
    }
    
    .case-video-wrapper {
        border-radius: 8px;
    }
    
    .case-video-wrapper .play-button {
        width: 48px;
        height: 48px;
    }
    
    .case-video-wrapper .play-button svg {
        width: 16px;
        height: 16px;
        margin-left: 2px;
    }
    
    .video-controls-container {
        padding: 1.5rem 0.75rem 0.5rem;
    }
    
    .video-controls-row {
        gap: 0.35rem;
    }
    
    .video-time {
        font-size: 0.6rem;
        gap: 0.2rem;
    }
    
    .case-section {
        padding: 3rem 1rem;
    }
    
    .case-section .section-title {
        font-size: 1.35rem;
    }
    
    .section-text p {
        font-size: 0.9rem;
    }
    
    .case-gallery {
        padding: 0 1rem;
    }
    
    .gallery-grid {
        gap: 0.75rem;
    }
    
    .results-grid {
        margin-top: 2rem;
        padding: 1.5rem 0;
    }
    
    .result-number {
        font-size: 1.75rem;
    }
    
    .result-label {
        font-size: 0.8rem;
    }
    
    .next-project {
        padding: 3rem 1rem;
    }
    
    .next-title {
        font-size: 1.35rem;
    }
    
    .case-error {
        padding: 1.5rem 1rem;
    }
    
    .case-error h2 {
        font-size: 1.35rem;
    }
}

/* Landscape phones */
@media (max-height: 500px) and (orientation: landscape) {
    .case-hero {
        height: auto;
        min-height: 100vh;
        padding-bottom: 2rem;
    }
    
    .case-hero-content {
        padding-top: 5rem;
    }
    
    .back-link {
        margin-bottom: 1.5rem;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    /* Make all interactive elements more touch-friendly */
    .back-link,
    .next-project-link,
    .btn-back {
        min-height: 44px;
    }
    
    /* Gallery items don't need hover zoom on touch */
    .gallery-item:hover img {
        transform: none;
    }
    
    /* Video controls always visible on touch */
    .case-video-wrapper .video-controls-container {
        opacity: 1;
    }
}