/* ========================================
   WORK / CASE STUDIES SECTION STYLES
   ======================================== */

.work {
    padding: var(--space-2xl) var(--space-md);
    background: var(--bg);
    position: relative;
    overflow: hidden;
}

.work::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.work-inner {
    max-width: 1200px;
    margin: 0 auto;
}

/* Cases Grid */
.cases-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: var(--space-2xl);
}

/* Case Card */
.case-card {
    position: relative;
    border-radius: 20px;
    background: var(--bg);
    border: 1px solid var(--border-strong);
    overflow: hidden;
    transition: all 0.4s var(--ease-out);
}

.case-card.expanded {
    border-color: var(--accent);
    box-shadow: 0 20px 60px rgba(5, 150, 105, 0.15);
}

.case-card-inner {
    position: relative;
}

/* Case Front */
.case-front {
    padding: var(--space-lg);
    transition: opacity 0.3s ease;
}

.case-card.expanded .case-front {
    opacity: 0;
    pointer-events: none;
    position: absolute;
    inset: 0;
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.case-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.case-industry,
.case-year {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 500;
}

.case-industry {
    background: var(--accent-bg);
    color: var(--accent);
}

.case-year {
    background: var(--bg-muted);
    color: var(--text-muted);
}

.case-logo {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.02em;
}

.case-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.35;
    margin-bottom: var(--space-sm);
    letter-spacing: -0.01em;
}

.case-brief {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

/* Case Metrics */
.case-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.case-metric {
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: var(--space-md);
    text-align: center;
}

.metric-before {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
    opacity: 0.7;
}

.metric-arrow {
    color: var(--accent);
    margin: 6px 0;
}

.metric-arrow svg {
    width: 16px;
    height: 16px;
    transform: rotate(0deg);
}

.metric-after {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

.metric-after.saved {
    color: var(--accent);
}

.metric-name {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Expand Button */
.case-expand {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: var(--space-md);
    background: var(--bg-subtle);
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}

.case-expand:active {
    transform: scale(0.98);
}

.case-expand svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

/* Case Back / Expanded View */
.case-back {
    display: none;
    padding: var(--space-lg);
    animation: caseExpand 0.4s var(--ease-out);
}

.case-card.expanded .case-back {
    display: block;
}

@keyframes caseExpand {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.case-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.case-close:hover {
    color: var(--text);
    border-color: var(--text-muted);
}

.case-close svg {
    width: 18px;
    height: 18px;
}

.case-detail-scroll {
    max-height: 60vh;
    overflow-y: auto;
    padding-right: var(--space-sm);
    -webkit-overflow-scrolling: touch;
}

.case-detail-scroll::-webkit-scrollbar {
    width: 4px;
}

.case-detail-scroll::-webkit-scrollbar-track {
    background: var(--bg-muted);
    border-radius: 2px;
}

.case-detail-scroll::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 2px;
}

.case-detail-section {
    margin-bottom: var(--space-lg);
}

.case-detail-section:last-child {
    margin-bottom: 0;
}

.detail-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-sm);
}

.case-detail-section p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.detail-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.detail-list li {
    position: relative;
    padding-left: var(--space-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.detail-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--accent-bg);
    border: 2px solid var(--accent);
    border-radius: 50%;
}

/* Detail Results Grid */
.detail-results {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.detail-result {
    background: var(--accent-bg);
    border-radius: 12px;
    padding: var(--space-md);
    text-align: center;
}

.result-value {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 4px;
}

.result-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Quote */
.detail-quote {
    background: var(--bg-subtle);
    border-left: 3px solid var(--accent);
    padding: var(--space-md);
    border-radius: 0 12px 12px 0;
    font-size: 0.95rem;
    color: var(--text);
    font-style: italic;
    line-height: 1.6;
}

.detail-quote cite {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.8rem;
    font-style: normal;
    color: var(--text-muted);
}

/* Work CTA */
.work-cta {
    background: var(--bg-subtle);
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    padding: var(--space-lg);
    text-align: center;
}

.work-cta-content {
    margin-bottom: var(--space-lg);
}

.work-cta-text {
    font-size: 1rem;
    color: var(--text);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.work-cta .btn {
    width: 100%;
    padding: 16px var(--space-lg);
    min-height: 52px;
}

.work-cta-note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: left;
    line-height: 1.55;
}

.work-cta-note svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 1px;
    color: var(--accent);
}

/* Scroll reveal animations */
.case-card {
    opacity: 0;
    transform: translateY(30px);
}

.case-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s var(--ease-out);
}

.case-card:nth-child(1).visible { transition-delay: 0s; }
.case-card:nth-child(2).visible { transition-delay: 0.1s; }
.case-card:nth-child(3).visible { transition-delay: 0.2s; }

/* ========== TABLET (640px+) ========== */
@media (min-width: 640px) {
    .work {
        padding: var(--space-2xl) var(--space-lg);
    }

    .case-front {
        padding: var(--space-xl);
    }

    .case-back {
        padding: var(--space-xl);
    }

    .case-title {
        font-size: 1.35rem;
    }

    .case-metrics {
        gap: var(--space-md);
    }

    .metric-after {
        font-size: 1.75rem;
    }

    .detail-results {
        grid-template-columns: repeat(4, 1fr);
    }

    .work-cta {
        padding: var(--space-xl);
    }

    .work-cta-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-lg);
        text-align: left;
    }

    .work-cta-text {
        margin-bottom: 0;
        flex: 1;
    }

    .work-cta .btn {
        width: auto;
        flex-shrink: 0;
    }
}

/* ========== DESKTOP (1024px+) ========== */
@media (min-width: 1024px) {
    .work {
        padding: var(--space-2xl) var(--space-xl);
    }

    .cases-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
    }

    .case-card {
        display: flex;
        flex-direction: column;
    }

    .case-card:hover:not(.expanded) {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
    }

    .case-card:hover:not(.expanded) .case-expand {
        background: var(--accent);
        border-color: var(--accent);
        color: white;
    }

    .case-card:hover:not(.expanded) .case-expand svg {
        transform: translateY(2px);
    }

    .case-card-inner {
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .case-front {
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .case-brief {
        flex: 1;
    }

    .case-card.expanded {
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 90vw;
        max-width: 700px;
        max-height: 90vh;
        z-index: 1000;
        border-radius: 24px;
    }

    .case-card.expanded .case-back {
        padding: var(--space-2xl);
    }

    .case-detail-scroll {
        max-height: 70vh;
    }

    .work-cta {
        border-radius: 24px;
        padding: var(--space-2xl);
    }

    .work-cta-note {
        justify-content: center;
        text-align: center;
        max-width: 500px;
        margin: 0 auto;
    }
}

/* Overlay for expanded cards on desktop */
.case-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.case-overlay.active {
    display: block;
    opacity: 1;
}

/* Focus states */
.case-expand:focus-visible,
.case-close:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .case-card {
        opacity: 1;
        transform: none;
    }
    
    .case-card.visible {
        transition: none;
    }
}