/* css/pages/problem-solution.css - Problem & Solution page specific styles */

/* ===== PAGE HEADER ===== */

.page-header {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    position: relative;
    color: white;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
    transform: rotate(45deg);
}

.page-header-content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.page-title {
    color: white;
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    font-family: var(--font-serif);
}

.page-title .title-highlight {
    color: var(--color-accent);
}

.page-subtitle {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 1rem;
    font-weight: 300;
}

.page-breadcrumb {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.page-breadcrumb a {
    color: white;
    text-decoration: none;
}

.page-breadcrumb a:hover {
    color: var(--color-accent);
}

.page-header-wave {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    line-height: 0;
    z-index: 3;
}

.page-header-wave svg {
    width: 100%;
    height: auto;
    fill: var(--color-surface);
}

/* ===== ABOUT PAGE - REFINED ===== */

.about-section {
    padding: var(--section-padding) 0;
    background: white;
}

.about-section .container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.about-header {
    text-align: center;
    max-width: 900px;
    margin: 0 auto var(--space-12);
}

.about-eyebrow {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-secondary-500);
    margin-bottom: var(--space-3);
}

.about-title {
    font-size: var(--text-4xl);
    font-weight: var(--weight-bold);
    line-height: var(--leading-tight);
    letter-spacing: -0.025em;
    font-family: var(--font-display);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.about-title .title-highlight {
    color: var(--color-secondary-500);
}

.about-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    max-width: 700px;
    margin: 0 auto var(--space-6);
}

.about-trust {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.trust-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.35rem 1rem;
    background: var(--color-background-alt);
    border-radius: 50px;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border-light);
}

.trust-pill i {
    color: var(--color-secondary-500);
    font-size: 0.8rem;
}

.about-bridge {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    max-width: 500px;
    margin: 0 auto var(--space-8);
}

.bridge-line {
    flex: 1;
    height: 1px;
    background: var(--color-border-light);
}

.bridge-label {
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

.about-problem {
    max-width: 800px;
    margin: 0 auto var(--space-12);
    text-align: center;
}

.problem-text {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-3);
}

.problem-solution-text {
    font-size: var(--text-lg);
    color: var(--color-text-primary);
    font-weight: var(--weight-medium);
}

.problem-solution-text strong {
    color: var(--color-secondary-500);
}

.about-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    max-width: 1000px;
    margin: 0 auto var(--space-12);
}

.pillar-card {
    background: var(--color-background-alt);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    text-align: center;
    border: 1px solid var(--color-border-light);
    transition: all 0.3s ease;
}

.pillar-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-secondary-300);
}

.pillar-icon {
    font-size: 2.5rem;
    color: var(--color-secondary-500);
    margin-bottom: var(--space-4);
}

.pillar-card h3 {
    font-size: var(--text-xl);
    font-weight: var(--weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.pillar-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

.about-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    max-width: 700px;
    margin: 0 auto var(--space-12);
    padding: var(--space-4) var(--space-6);
    background: var(--color-background-alt);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border-light);
}

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

.stat-number {
    display: block;
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--color-secondary-500);
    line-height: 1.2;
}

.stat-label {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 30px;
    background: var(--color-border-light);
}

.about-cta {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.about-cta .btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

/* ===== SOLUTION ARCHITECTURE ===== */

.solution-architecture {
    padding: var(--spacing-xl) 0;
    background: var(--color-surface);
}

.solution-intro {
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    font-size: 1.1rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

.components-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.component-card {
    background: var(--color-background-alt);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

.component-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.component-card.highlight {
    border-color: var(--color-secondary);
    background: linear-gradient(135deg, var(--color-background-alt), white);
}

.component-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-secondary);
    opacity: 0.15;
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    line-height: 1;
}

.component-icon {
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.component-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.component-card p {
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.component-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.3rem 0.75rem;
    background: var(--color-surface);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
}

.feature-tag i {
    color: var(--color-secondary);
    font-size: 0.7rem;
}

/* ===== TECHNICAL FOUNDATION ===== */

.technical-foundation {
    padding: var(--spacing-xl) 0;
    background: var(--color-background-alt);
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.tech-content .section-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.tech-content p {
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    font-size: 1.05rem;
}

.tech-algorithm {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.tech-algorithm h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.tech-algorithm ul {
    list-style: none;
    padding: 0;
}

.tech-algorithm li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--color-text-light);
    font-size: 0.95rem;
    border-bottom: 1px solid var(--color-border);
}

.tech-algorithm li:last-child {
    border-bottom: none;
}

.tech-algorithm li i {
    color: var(--color-secondary);
    font-size: 1rem;
}

.tech-stack h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

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

.stack-tag {
    padding: 0.4rem 1rem;
    background: var(--color-surface);
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.stack-tag:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

/* Architecture Diagram */
.tech-visual {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.architecture-diagram {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.diagram-node {
    text-align: center;
    padding: var(--spacing-md) 0.5rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 0.85rem;
}

.diagram-node i {
    display: block;
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.diagram-node.mern {
    background: #f0f4f8;
    color: #2d3748;
}

.diagram-node.express {
    background: #e8f0fe;
    color: #1a73e8;
}

.diagram-node.react {
    background: #e6f7f2;
    color: #00a86b;
}

.diagram-node.node {
    background: #eaf5e9;
    color: #3c873a;
}

.diagram-node.websocket {
    background: #fef3e2;
    color: #d4802a;
}

.diagram-connector {
    height: 2px;
    background: var(--color-border);
    position: relative;
}

.diagram-connector::after {
    content: '→';
    position: absolute;
    right: -8px;
    top: -8px;
    color: var(--color-text-lighter);
    font-size: 0.8rem;
}

.diagram-caption {
    text-align: center;
    color: var(--color-text-lighter);
    font-size: 0.85rem;
    margin-top: var(--spacing-md);
}

/* ===== AUTOMOTIVE SAFETY ===== */

.automotive-safety {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
}

.safety-intro {
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    line-height: 1.8;
}

.safety-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto var(--spacing-xl);
}

.safety-card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition-base);
}

.safety-card:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.12);
    border-color: var(--color-secondary);
}

.safety-card.highlight {
    border-color: var(--color-secondary);
    background: rgba(255,255,255,0.12);
}

.safety-icon {
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-md);
}

.safety-card h4 {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.safety-card p {
    color: rgba(255,255,255,0.8);
    line-height: 1.7;
    font-size: 0.95rem;
}

.safety-card ul {
    list-style: none;
    padding: 0;
}

.safety-card ul li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0;
    color: rgba(255,255,255,0.85);
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.safety-card ul li:last-child {
    border-bottom: none;
}

.safety-card ul li i {
    color: var(--color-secondary);
    font-size: 0.8rem;
}

.safety-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--spacing-md);
    padding: 0.5rem 1rem;
    background: var(--color-secondary);
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
}

.safety-status {
    text-align: center;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1.5rem;
    background: rgba(39, 174, 96, 0.15);
    border: 1px solid rgba(39, 174, 96, 0.3);
    border-radius: 50px;
    color: #2ecc71;
    font-weight: 600;
    font-size: 0.9rem;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    max-width: 200px;
}

.safety-status i {
    font-size: 1.2rem;
}

/* ===== PROBLEM CTA ===== */

.problem-cta {
    padding: var(--spacing-xl) 0;
    background: var(--color-surface);
    text-align: center;
}

.cta-block h2 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 2.5rem;
}

.cta-block p {
    color: var(--color-text-light);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.cta-buttons .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

@media (max-width: 1200px) {
    .problem-intro .section-title {
        font-size: 2.4rem;
    }
    
    .tech-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .architecture-diagram {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .problem-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .components-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .safety-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .problem-intro .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 2.5rem;
    }
    
    .problem-intro {
        padding: 0 15px;
    }
    
    .problem-intro .section-title {
        font-size: 2rem;
        line-height: 1.3;
    }
    
    .problem-intro .intro-text {
        font-size: 1rem;
        line-height: 1.6;
    }
    
    .problem-grid {
        grid-template-columns: 1fr;
    }
    
    .components-grid {
        grid-template-columns: 1fr;
    }
    
    .safety-grid {
        grid-template-columns: 1fr;
    }
    
    .architecture-diagram {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .diagram-connector {
        display: none;
    }
    
    .problem-quote blockquote {
        font-size: 1rem;
        padding-left: 30px;
    }
    
    .problem-quote i {
        font-size: 1.5rem;
        top: 10px;
        left: 10px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 576px) {
    .problem-intro .section-title {
        font-size: 1.8rem;
    }
    
    .problem-intro .title-highlight::after {
        height: 5px;
        bottom: 2px;
    }
    
    .problem-intro .title-underline {
        width: 60px;
        height: 3px;
    }
    
    .problem-intro .intro-text {
        font-size: 0.95rem;
    }
    
    .problem-quote {
        padding: var(--spacing-md);
    }
    
    .problem-quote blockquote {
        font-size: 0.95rem;
        padding-left: 25px;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 2rem;
    }
    
    .problem-intro .section-title {
        font-size: 1.6rem;
    }
}

/* Height-based adjustments */
@media (max-height: 700px) and (min-width: 769px) {
    .intro-section {
        padding: 40px 0 25px;
    }
}




@media (max-width: 820px) {
    .about-pillars {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-4);
    }

    .about-stats {
        flex-wrap: wrap;
        gap: var(--space-4);
    }

    .stat-divider {
        display: none;
    }

    .about-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 480px) {
    .about-section .container {
        padding: 0 var(--space-4);
    }

    .about-title {
        font-size: 2.2rem;
    }

    .about-subtitle {
        font-size: var(--text-base);
    }

    .about-pillars {
        grid-template-columns: 1fr;
        max-width: 360px;
        margin-left: auto;
        margin-right: auto;
    }

    .about-trust {
        flex-direction: column;
        align-items: center;
    }

    .about-stats {
        flex-direction: column;
        padding: var(--space-4);
        gap: var(--space-2);
    }

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

    .about-cta .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}