/* ================================
   CASE STUDY PAGE STYLES
   Extends the base styles.css
   ================================ */

/* Back Navigation */
.back-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.25rem 0;
    transition: all var(--duration-normal) var(--ease-out);
}

.back-nav.scrolled {
    padding: 1rem 0;
    background: rgba(5, 5, 5, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.back-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast) ease;
}

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

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

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

/* Case Study Hero */
.case-hero {
    padding: 160px 0 80px;
    position: relative;
    z-index: 1;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow: hidden;
}

.case-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 600px;
    background: radial-gradient(ellipse, var(--case-glow, rgba(255, 92, 53, 0.08)) 0%, transparent 60%);
    pointer-events: none;
}

.case-hero-content {
    max-width: 800px;
}

.case-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.case-client-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.375rem 1rem 0.375rem 0.375rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
}

.case-client-badge .badge-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-primary);
}

.case-industry {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 100px;
}

.case-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 1.25rem;
}

.case-subtitle {
    font-size: clamp(1.0625rem, 1.3vw, 1.1875rem);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 650px;
    margin-bottom: 2rem;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.case-tags span {
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    background: var(--accent-subtle);
    border: 1px solid var(--border-accent);
    border-radius: 100px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Dashboard Showcase (top image) */
.case-showcase {
    position: relative;
    z-index: 2;
    background: var(--bg-secondary);
    padding: 0 0 4rem;
    margin-top: -2rem;
}

.case-image-hero {
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border);
    border-radius: 16px;
}

/* App Screen Showcase (mobile screenshots) */
.app-screens {
    display: flex;
    justify-content: center;
    gap: 2rem;
    align-items: flex-start;
}

.app-screen {
    flex: 0 0 auto;
    width: 280px;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border);
    background: #000;
}

.app-screen img {
    width: 100%;
    height: auto;
    display: block;
}

@media (max-width: 1024px) {
    .app-screens {
        gap: 1.5rem;
    }

    .app-screen {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .app-screens {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 1rem;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
    }

    .app-screen {
        flex: 0 0 260px;
        scroll-snap-align: center;
    }
}

@media (max-width: 480px) {
    .app-screen {
        flex: 0 0 220px;
        border-radius: 20px;
    }
}

/* Case Study Body */
.case-body {
    position: relative;
    z-index: 2;
    background: var(--bg-secondary);
}

/* Overview / Key Metrics Strip */
.case-overview {
    padding: 4rem 0;
    border-bottom: 1px solid var(--border);
}

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

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

.overview-value {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.overview-value .accent {
    color: var(--accent);
}

.overview-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Case Sections */
.case-section {
    padding: var(--section-padding) 0;
    border-bottom: 1px solid var(--border);
}

.case-section:last-child {
    border-bottom: none;
}

.case-section-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 4rem;
    align-items: start;
}

.case-section-label {
    position: sticky;
    top: 100px;
}

.case-section-label span {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

.case-section-label h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-top: 0.5rem;
}

.case-section-content p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

/* Bullet List in Case Study */
.case-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
    margin-bottom: 1.5rem;
}

.case-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.case-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.55rem;
}

/* Highlight Box */
.case-highlight {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(13, 13, 13, 0.8) 100%);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: 0 12px 12px 0;
    padding: 1.5rem 2rem;
    margin: 2rem 0;
}

.case-highlight p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

/* Tech Stack Cards */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.tech-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    transition: all var(--duration-fast) ease;
}

.tech-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.tech-item-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.tech-item-desc {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* CTA Section */
.case-cta {
    padding: var(--section-padding) 0;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
    z-index: 2;
}

.case-cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(255, 92, 53, 0.06) 0%, transparent 60%);
    pointer-events: none;
}

.case-cta h2 {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.case-cta p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 2rem;
}

.case-cta .cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Approach Steps */
.approach-step {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    margin-top: 2rem;
}

.approach-step:first-of-type {
    margin-top: 0.5rem;
}

/* Results Before/After Table */
.results-table {
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.results-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: 1px solid var(--border);
}

.results-row:last-child {
    border-bottom: none;
}

.results-row.results-header {
    background: var(--bg-card);
}

.results-row.results-header .results-cell {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    padding: 1rem 1.25rem;
}

.results-cell {
    padding: 1rem 1.25rem;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.results-cell.before {
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
}

.results-cell.after {
    color: var(--accent);
    font-weight: 500;
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.kpi-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.125rem 1.25rem;
    transition: all var(--duration-fast) ease;
}

.kpi-item:hover {
    border-color: var(--border-hover);
}

.kpi-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
}

.kpi-desc {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Case Study Image */
.case-image {
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
}

.case-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Placeholder Content State */
.placeholder-content {
    color: var(--text-muted);
    font-style: italic;
}

/* ================================
   RESPONSIVE
   ================================ */

@media (max-width: 1024px) {
    .case-section-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .case-section-label {
        position: static;
    }

    .overview-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .case-hero {
        padding: 120px 0 60px;
    }

    .case-hero::before {
        display: none;
    }

    .case-cta::before {
        display: none;
    }

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

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

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

    .results-cell {
        font-size: 0.8125rem;
        padding: 0.875rem 1rem;
    }

    .case-cta .cta-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .case-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .case-highlight {
        padding: 1.25rem 1.5rem;
    }

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