/* ============================================
   Case Study Page Styles
   Extends base style.css with case-study-specific 
   components while sharing the same design tokens.
   ============================================ */

/* Back Link */
.cs-back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-primary);
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 2rem;
    transition: gap 0.3s ease, color 0.3s ease;
}

.cs-back-link:hover {
    gap: 0.8rem;
    color: #23653e;
}

/* Case Study Hero */
.cs-hero {
    padding-top: 120px;
    padding-bottom: 40px;
}

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

.cs-category {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 1rem;
    background: rgba(46, 125, 78, 0.1);
    padding: 0.4rem 1rem;
    border-radius: 30px;
    border: 1px solid rgba(46, 125, 78, 0.2);
}

.cs-title {
    font-size: 3.5rem;
    letter-spacing: -1.5px;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cs-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 680px;
    margin-bottom: 2.5rem;
}

.cs-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.cs-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.cs-meta-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    font-weight: 500;
}

.cs-meta-value {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Hero Visual Mockup */
.cs-hero-visual {
    margin-top: 3.5rem;
}

.cs-mockup-frame {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(28, 64, 40, 0.12), 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.cs-mockup-topbar {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.5);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.cs-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(46, 125, 78, 0.25);
}

.cs-dot:first-child {
    background: rgba(231, 76, 60, 0.5);
}

.cs-dot:nth-child(2) {
    background: rgba(241, 196, 15, 0.5);
}

.cs-dot:nth-child(3) {
    background: rgba(46, 204, 113, 0.5);
}

.cs-mockup-body {
    display: flex;
    min-height: 340px;
}

.cs-mock-sidebar {
    width: 60px;
    background: rgba(46, 125, 78, 0.06);
    padding: 1rem 0.7rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    border-right: 1px solid rgba(0, 0, 0, 0.04);
}

.cs-mock-sidebar-item {
    height: 32px;
    border-radius: 8px;
    background: rgba(46, 125, 78, 0.1);
    transition: all 0.3s ease;
}

.cs-mock-sidebar-item.active {
    background: var(--accent-primary);
    box-shadow: 0 2px 8px rgba(46, 125, 78, 0.3);
}

.cs-mock-main {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.cs-mock-stats {
    display: flex;
    gap: 1rem;
}

.cs-mock-stat-card {
    flex: 1;
    height: 70px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(46, 125, 78, 0.08), rgba(139, 195, 74, 0.12));
    border: 1px solid rgba(46, 125, 78, 0.1);
    position: relative;
    overflow: hidden;
}

.cs-mock-stat-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 0 0 12px 12px;
}

.cs-mock-chart {
    flex: 1;
    border-radius: 12px;
    background: linear-gradient(180deg, rgba(46, 125, 78, 0.05), rgba(139, 195, 74, 0.08));
    border: 1px solid rgba(46, 125, 78, 0.08);
    position: relative;
    overflow: hidden;
    min-height: 120px;
}

.cs-mock-chart::before {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    height: 60%;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 100'%3E%3Cpath d='M0,80 Q50,60 100,65 T200,40 T300,50 T400,20' fill='none' stroke='%232E7D4E' stroke-width='2' opacity='0.3'/%3E%3Cpath d='M0,80 Q50,60 100,65 T200,40 T300,50 T400,20 L400,100 L0,100 Z' fill='%232E7D4E' opacity='0.05'/%3E%3C/svg%3E") no-repeat center;
    background-size: contain;
}

.cs-mock-table {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.cs-mock-table-row {
    height: 28px;
    border-radius: 8px;
    background: rgba(46, 125, 78, 0.04);
    border: 1px solid rgba(46, 125, 78, 0.06);
}

.cs-mock-table-row:first-child {
    background: rgba(46, 125, 78, 0.08);
}

/* Section Styles */
.cs-section {
    padding: 80px 0;
}

.cs-section-alt {
    background: rgba(46, 125, 78, 0.02);
}

.cs-section-header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.cs-section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0;
}

/* Two Column Layout */
.cs-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.cs-col-text h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 1.2rem;
}

.cs-col-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.cs-goal-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.cs-goal-list li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.cs-goal-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
}

/* Research Grid */
.cs-research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto 3rem;
}

.cs-research-card {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cs-research-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(28, 64, 40, 0.12);
}

.cs-research-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cs-research-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.cs-research-stat {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem !important;
}

.cs-research-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.7;
}

/* Key Insights */
.cs-insights {
    max-width: 1000px;
    margin: 0 auto;
}

.cs-insights h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.cs-insight-items {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.cs-insight-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.cs-insight-num {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    opacity: 0.3;
    flex-shrink: 0;
    line-height: 1;
    min-width: 48px;
}

.cs-insight-item h4 {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.cs-insight-item p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.7;
}

/* Process Timeline */
.cs-process-timeline {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: relative;
}

.cs-process-timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 40px;
    bottom: 40px;
    width: 2px;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
    opacity: 0.25;
    border-radius: 2px;
}

.cs-process-step {
    display: flex;
    gap: 2rem;
    position: relative;
    transition: transform 0.4s ease;
}

.cs-process-step:hover {
    transform: translateX(8px);
}

.cs-step-marker {
    flex-shrink: 0;
    position: relative;
    z-index: 2;
}

.cs-step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(46, 125, 78, 0.3);
}

.cs-step-content h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.cs-step-duration {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.cs-step-content p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* Solution Features */
.cs-solution-intro {
    text-align: center;
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: -1rem auto 3rem;
    line-height: 1.7;
}

.cs-solution-features {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.cs-feature-card {
    display: flex;
    gap: 2.5rem;
    align-items: center;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cs-feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(28, 64, 40, 0.12);
}

.cs-feature-visual {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(46, 125, 78, 0.08), rgba(139, 195, 74, 0.15));
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(46, 125, 78, 0.12);
}

.cs-feature-icon-large {
    font-size: 3rem;
}

.cs-feature-text h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 0.6rem;
}

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

.cs-feature-tags {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

/* Results Grid */
.cs-results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto 3rem;
}

.cs-result-card {
    text-align: center;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cs-result-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(28, 64, 40, 0.12);
}

.cs-result-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.3rem;
    line-height: 1.1;
}

.cs-result-label {
    display: block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.cs-result-detail {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Testimonial */
.cs-testimonial {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.cs-quote-icon {
    font-size: 4rem;
    color: var(--accent-primary);
    opacity: 0.15;
    line-height: 1;
    margin-bottom: -1rem;
}

.cs-testimonial blockquote p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-style: italic;
    margin-bottom: 1.5rem;
}

.cs-testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.cs-author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    flex-shrink: 0;
}

.cs-testimonial-author strong {
    display: block;
    color: var(--text-primary);
    font-size: 1rem;
}

.cs-testimonial-author span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Key Learnings */
.cs-learnings-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.cs-learning-card {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.cs-learning-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 40px rgba(28, 64, 40, 0.12);
}

.cs-learning-num {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-primary);
    opacity: 0.15;
    line-height: 1;
    display: block;
    margin-bottom: 1rem;
}

.cs-learning-card h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

.cs-learning-card p {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.7;
}

/* Navigation CTA */
.cs-nav-section {
    padding-bottom: 60px;
}

.cs-nav-cta {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cs-nav-cta h2 {
    font-size: 2rem;
    margin-bottom: 0.8rem;
}

.cs-nav-cta p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.cs-nav-cta .cta-group {
    justify-content: center;
}

/* ============================================
   Responsive Styles
   ============================================ */

@media (max-width: 900px) {
    .cs-title {
        font-size: 2.5rem;
    }

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

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

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

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

    .cs-feature-card {
        flex-direction: column;
        text-align: center;
    }

    .cs-feature-tags {
        justify-content: center;
    }

    .cs-process-timeline::before {
        display: none;
    }

    .cs-process-step {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

@media (max-width: 600px) {
    .cs-hero {
        padding-top: 100px;
    }

    .cs-title {
        font-size: 2rem;
    }

    .cs-subtitle {
        font-size: 1.05rem;
    }

    .cs-meta-row {
        gap: 1.2rem;
    }

    .cs-section-header h2 {
        font-size: 2rem;
    }

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

    .cs-result-number {
        font-size: 2.5rem;
    }

    .cs-mock-sidebar {
        display: none;
    }

    .cs-mockup-body {
        min-height: 240px;
    }
}