/* case-studies.css - Enterprise Hub Design System 
   Aligned with global styles.css and project-detail.css tokens
*/

:root {
    /* Local Overrides (to be used sparingly) */
    --hub-hero-bg: var(--lab-bg-hero-dark);
    --hub-dark-solid: #1e3966;
}

/* 1. Global Navigation Refinement 
   Ensure navigation looks consistent with project-detail.html
*/
.header {
    background: var(--header-bg);
    border-bottom: 1px solid var(--lab-border-light);
}

/* 2. Hero Section - Re-Architected for Depth */
.hub-hero {
    background: var(--hub-hero-bg);
    padding: var(--section-spacing) var(--full-width-padding);
    position: relative;
    overflow: hidden;
    text-align: center;
    min-height: 500px;
    display: flex;
    align-items: center;
}

.hub-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://www.transparenttextures.com/patterns/carbon-fibre.png');
    opacity: 0.1;
    z-index: 0;
}

.hub-hero-container {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
}

.hub-hero h1 {
    font: var(--font-title1);
    color: white;
    margin-bottom: var(--card-gap-lg);
    line-height: 1.1;
}

.hub-hero p {
    font: var(--font-subtitle1);
    color: #94a3b8;
    max-width: 800px;
    margin: 0 auto var(--card-gap-xl);
}

/* 3. Technology Strip */
.tech-strip {
    display: flex;
    justify-content: center;
    gap: var(--card-gap-lg);
    flex-wrap: wrap;
    margin-top: var(--card-gap-xl);
    opacity: 0.8;
}

.tech-logo {
    font: var(--font-caption);
    color: #cbd5e1;
    letter-spacing: 0.1em;
    padding: 8px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
}

/* 4. Proof Section */
.proof-section {
    margin-top: var(--card-gap-xl);
    padding: var(--card-gap-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.proof-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--card-gap-lg);
}

.proof-val {
    display: block;
    font: var(--font-title3);
    color: white;
    margin-bottom: 4px;
}

.proof-label {
    font: var(--font-caption);
    color: #94a3b8;
    text-transform: uppercase;
}

/* 5. Section Rhythm & Editorial Layouts */
.bg-dark { background: var(--hub-dark-solid); color: white; }
.bg-light { background: var(--lab-bg-light); }
.bg-white { background: var(--lab-bg-white); }

section {
    padding: var(--section-spacing) var(--full-width-padding);
}

.section-header h2 {
    font: var(--font-title2);
    margin-bottom: var(--card-gap-md);
}

.section-header p {
    font: var(--font-body1);
    color: var(--lab-text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* 6. Operational Challenges - Grid Cards */
.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--card-gap-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.problem-card {
    background: var(--lab-bg-white);
    padding: var(--card-gap-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--lab-border-light);
    box-shadow: var(--lab-shadow-light);
    transition: all 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--lab-shadow-medium);
    border-color: var(--lab-palette-primary-light);
}

.problem-icon {
    font-size: 2rem;
    color: var(--lab-palette-primary-main);
    margin-bottom: var(--card-gap-md);
}

.problem-card h3 {
    font: var(--font-title4);
    margin-bottom: var(--card-gap-sm);
    color: var(--lab-text-primary);
}

.problem-card p {
    font: var(--font-body2);
    color: var(--lab-text-muted);
}

/* 7. Case Study Grid - Rebuilt with Layered Depth */
.case-study-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--card-gap-xl);
}

.case-card {
    background: var(--lab-bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--lab-border-light);
    box-shadow: var(--lab-shadow-medium);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    display: flex;
    flex-direction: column;
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--lab-shadow-heavy);
    border-color: var(--lab-palette-primary-light);
}

.card-top-metric {
    background: #f1f5f9;
    padding: var(--card-gap-md) var(--card-gap-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--lab-border-light);
}

.primary-result {
    font: var(--font-title3);
    color: var(--lab-palette-primary-main);
}

.result-label {
    font: var(--font-caption);
    color: var(--lab-text-muted);
    text-transform: uppercase;
}

.case-card-body {
    padding: var(--card-gap-lg);
    flex: 1;
}

.case-card-body h3 {
    font: var(--font-title4);
    margin-bottom: var(--card-gap-md);
    color: var(--lab-text-primary);
}

.case-summary {
    font: var(--font-body1);
    color: var(--lab-text-muted);
    margin-bottom: var(--card-gap-lg);
    line-height: 1.5;
}

/* 7. Featured Spotlight - Editorial Layout */
.spotlight-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.spotlight-content {
    padding: var(--section-spacing);
}

.spotlight-content h3 {
    font: var(--font-title2);
    color: white;
    margin-bottom: var(--card-gap-md);
}

.spotlight-content p {
    font: var(--font-body1);
    color: #cbd5e1;
    margin-bottom: var(--card-gap-xl);
}

.spotlight-visual {
    background: #1e293b;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--card-gap-xl);
}

/* 8. Engineering Depth - Structured Layout */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--card-gap-lg);
    max-width: 1200px;
    margin: 40px auto 0;
}

.challenge-item {
    background: var(--lab-bg-white);
    padding: var(--card-gap-lg);
    border-left: 4px solid var(--lab-palette-accent-pink);
    border-radius: var(--radius-sm);
    box-shadow: var(--lab-shadow-light);
}

.challenge-num {
    font: var(--font-caption);
    color: var(--lab-palette-accent-pink);
    margin-bottom: var(--card-gap-xs);
}

.challenge-item h4 {
    font: var(--font-title5);
    margin-bottom: var(--card-gap-xs);
    color: var(--lab-text-primary);
}

.challenge-item p {
    font: var(--font-body2);
    color: var(--lab-text-muted);
}

/* 9. Functional Components */
.filter-bar {
    background: #f1f5f9;
    padding: 6px;
    border-radius: 100px;
    display: inline-flex;
    gap: 4px;
    margin-bottom: var(--card-gap-xl);
}

.filter-btn {
    border: none;
    background: transparent;
    padding: 10px 24px;
    border-radius: 100px;
    font: var(--font-body2);
    font-weight: 700;
    color: var(--lab-text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn.active {
    background: white;
    color: var(--lab-palette-primary-main);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* 9. Floating Conversion CTA Styling (Standardized) */
.floating-cta {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--lab-border-light);
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(51, 96, 173, 0.15);
    z-index: 1000;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    width: fit-content;
    pointer-events: none;
}

.floating-cta.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: all;
}

.floating-cta-content {
    display: flex;
    align-items: center;
    gap: 20px;
    white-space: nowrap;
}

.floating-cta-content p {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--lab-text-primary);
    margin: 0;
}

.floating-cta-content .btn-primary {
    padding: 10px 20px;
    font-size: 0.85rem;
    border-radius: 25px;
}

/* 10. Responsive Overrides */
@media (max-width: 1024px) {
    .spotlight-card { grid-template-columns: 1fr; }
    .proof-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hub-hero h1 { font: var(--font-title2); }
    .section-header h2 { font: var(--font-title3); }
    .case-study-grid { grid-template-columns: 1fr; }
    .floating-cta { left: 15px; right: 15px; bottom: 20px; width: auto; transform: translateX(0) translateY(100px); border-radius: 20px; }
    .floating-cta.visible { transform: translateX(0) translateY(0); }
    .floating-cta-content { justify-content: space-between; width: 100%; gap: 10px; }
    .floating-cta-content p { font-size: 0.8rem; }
}