/* ============================================
   LAYOUT.CSS - Page Layout & Structure
   ============================================ */

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-base);
}

body.dark-theme .header {
    background-color: rgba(15, 20, 25, 0.8);
}

.navbar {
    padding: var(--spacing-md) 0;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

/* ============================================
   Main Content Sections
   ============================================ */

main {
    min-height: 100vh;
}

section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    padding: var(--spacing-3xl) 0;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero .container {
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.hero-title {
    font-size: var(--font-size-4xl);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
}

.illustration-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1 / 1;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.illustration-placeholder svg {
    width: 100%;
    height: 100%;
}

/* ============================================
   Features Section
   ============================================ */

.features {
    background-color: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

/* ============================================
   Why Flux Section
   ============================================ */

.why-flux {
    background: linear-gradient(135deg, var(--color-primary-lightest) 0%, var(--color-bg-secondary) 100%);
}

.why-flux-content {
    max-width: 800px;
    margin: 0 auto;
}

.why-flux-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.why-item {
    display: flex;
    gap: var(--spacing-lg);
}

.why-icon {
    font-size: var(--font-size-3xl);
    flex-shrink: 0;
}

.why-text h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.why-text p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ============================================
   Preview Section
   ============================================ */

.preview-section {
    background-color: var(--color-bg);
}

.preview-carousel {
    margin-top: var(--spacing-2xl);
    position: relative;
}

.preview-track {
    display: flex;
    gap: var(--spacing-2xl);
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: var(--spacing-md) 0;
    -webkit-overflow-scrolling: touch;
}

.preview-track::-webkit-scrollbar {
    height: 6px;
}

.preview-track::-webkit-scrollbar-thumb {
    background: var(--color-primary-lighter);
}

.preview-item {
    flex-shrink: 0;
    width: 100%;
    max-width: 350px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.preview-image {
    position: relative;
    aspect-ratio: 9 / 12;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background-color: var(--color-bg-secondary);
    box-shadow: var(--shadow-lg);
}

.preview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-placeholder {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-placeholder svg {
    width: 100%;
    height: 100%;
}

.preview-title {
    text-align: center;
    color: var(--color-text);
    font-size: var(--font-size-lg);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background-color: var(--color-border-light);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background-color: var(--color-primary);
    width: 28px;
    border-radius: var(--radius-full);
}

/* ============================================
   Final CTA Section
   ============================================ */

.final-cta {
    background: linear-gradient(135deg, var(--color-primary-lightest) 0%, var(--color-primary) 100%);
    padding: var(--spacing-3xl) 0;
}

.cta-content {
    text-align: center;
    color: white;
}

.cta-content h2 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

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

/* ============================================
   Footer
   ============================================ */

.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border-light);
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-title {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
}

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablets */
@media (max-width: 768px) {
    section {
        padding: var(--spacing-2xl) 0;
    }

    .hero {
        min-height: auto;
        padding: var(--spacing-2xl) 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-description {
        font-size: var(--font-size-base);
    }

    .hero-illustration {
        order: -1;
    }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-xl);
    }

    .why-flux-list {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .preview-item {
        max-width: 300px;
    }

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

    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .section-title {
        font-size: var(--font-size-2xl);
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-description {
        font-size: var(--font-size-sm);
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

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

    .why-flux-list {
        grid-template-columns: 1fr;
    }

    .preview-item {
        max-width: 100%;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}