/* ==========================================================================
   Calabria Infissi - Premium Master Template CSS
   ========================================================================== */

/* --- CSS Variables (Design System) --- */
:root {
    /* Colors */
    --clr-background: #ffffff;
    --clr-surface: #f9f9f9;
    --clr-text-primary: #1a1a1a;
    --clr-text-secondary: #555555;
    --clr-accent: #2c2c2c;
    --clr-accent-hover: #000000;
    --clr-border: #e0e0e0;
    
    /* Typography */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    /* Easing */
    --ease-smooth: cubic-bezier(0.25, 1, 0.5, 1);
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--clr-text-primary);
    background-color: var(--clr-background);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s var(--ease-smooth);
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- Layout & Utilities --- */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section-padding {
    padding: var(--space-xl) 0;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.4s var(--ease-smooth);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--clr-accent);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--clr-accent-hover);
}

.btn-outline {
    background-color: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
    background-color: #fff;
    color: var(--clr-text-primary);
}

.btn-block {
    width: 100%;
}

/* --- Header --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: transform 0.4s var(--ease-smooth), padding 0.4s var(--ease-smooth);
}

.site-header.scrolled-down {
    transform: translateY(-100%);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo img {
    height: 45px;
    width: auto;
    object-fit: contain;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--space-md);
}

.main-nav a {
    font-size: 0.95rem;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--clr-accent);
    transition: width 0.3s var(--ease-smooth);
}

.main-nav a:hover::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.lang-btn {
    background: none;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
}

/* --- Hero Section --- */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    color: #fff;
    overflow: hidden;
}

.hero-bg, .hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    background-size: cover;
    background-position: center;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.6) 100%);
    z-index: -1;
}

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

.hero-content h1 {
    font-size: clamp(3rem, 5vw, 5rem);
    margin-bottom: var(--space-sm);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
    max-width: 500px;
    color: rgba(255, 255, 255, 0.9);
}

/* --- Products Section --- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-inline: auto;
}

.section-header h2 {
    font-size: 2.5rem;
}

.section-header p {
    color: var(--clr-text-secondary);
}

.products-accordion {
    display: flex;
    flex-direction: row;
    height: 500px;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--clr-border);
    background-color: var(--clr-surface);
}

.accordion-item {
    position: relative;
    flex: 1;
    overflow: hidden;
    transition: flex 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    cursor: pointer;
    border-right: 1px solid var(--clr-border);
    text-decoration: none;
}

.accordion-item:last-child {
    border-right: none;
}

.accordion-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 0.6s var(--ease-smooth);
    z-index: 0;
}

.accordion-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0,0,0,0.7);
    transition: background-color 0.6s var(--ease-smooth);
    z-index: 1;
}

.accordion-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: var(--space-md);
    z-index: 2;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
}

.accordion-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0;
    transition: margin-bottom 0.4s var(--ease-smooth);
    white-space: nowrap;
}

.accordion-content p {
    font-size: 0.95rem;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    margin-bottom: 0;
    transition: all 0.4s var(--ease-smooth);
    overflow: hidden;
}

.accordion-content .card-link {
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    opacity: 0;
    visibility: hidden;
    max-height: 0;
    transition: all 0.4s var(--ease-smooth);
}

/* Hover / Active States */
.accordion-item:hover,
.accordion-item.active {
    flex: 3;
}

.accordion-item:hover .accordion-overlay,
.accordion-item.active .accordion-overlay {
    background-color: rgba(0,0,0,0.3);
}

.accordion-item:hover .accordion-bg,
.accordion-item.active .accordion-bg {
    transform: scale(1.05);
}

.accordion-item:hover .accordion-content h3,
.accordion-item.active .accordion-content h3 {
    margin-bottom: var(--space-xs);
}

.accordion-item:hover .accordion-content p,
.accordion-item.active .accordion-content p {
    opacity: 1;
    visibility: visible;
    max-height: 100px;
    margin-bottom: var(--space-md);
}

.accordion-item:hover .accordion-content .card-link,
.accordion-item.active .accordion-content .card-link {
    opacity: 1;
    visibility: visible;
    max-height: 30px;
}

/* --- Benefits Section --- */
.benefits-section {
    background-color: var(--clr-surface);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    text-align: center;
}

.benefit-item h4 {
    font-size: 1.3rem;
    margin-bottom: var(--space-sm);
}

.benefit-item p {
    color: var(--clr-text-secondary);
    font-size: 0.95rem;
}

/* --- About Section --- */
.about-inner {
    text-align: center;
    max-width: 800px;
    margin-bottom: var(--space-lg);
}

.about-inner h2 {
    font-size: 2.5rem;
}

.about-inner p {
    font-size: 1.2rem;
    color: var(--clr-text-secondary);
}

/* Marquee Animation */
@keyframes scrollMarquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-50% - calc(var(--space-md) / 2))); }
}

.marquee-container {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding: var(--space-sm) 0;
    -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
    display: flex;
    width: max-content;
    gap: var(--space-md);
    animation: scrollMarquee 25s linear infinite;
}

.marquee-track:hover {
    animation-play-state: paused;
}

.marquee-item {
    width: 300px;
    height: 200px;
    border-radius: 8px;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.marquee-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-smooth);
}

.marquee-item:hover img {
    transform: scale(1.05);
}

/* --- Contact Form Section --- */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    background-color: var(--clr-surface);
    padding: var(--space-lg);
}

.contact-text h2 {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
}

.contact-text p {
    color: var(--clr-text-secondary);
}

.luxury-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    padding: 1rem;
    border: 1px solid var(--clr-border);
    background-color: #fff;
    font-family: var(--font-sans);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus, 
.form-group select:focus, 
.form-group textarea:focus {
    border-color: var(--clr-text-primary);
}

/* --- Footer --- */
.site-footer {
    background-color: var(--clr-text-primary);
    color: #fff;
    padding: var(--space-lg) 0 var(--space-md);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer-col .logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.footer-desc {
    color: rgba(255,255,255,0.6);
    max-width: 250px;
}

.footer-col h5 {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-sm);
}

.footer-col p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.social-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.social-links a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-md);
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
}

/* --- Scroll Animations (IntersectionObserver) --- */
.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.8s var(--ease-smooth), transform 0.8s var(--ease-smooth);
    will-change: opacity, transform;
}

.fade-in.is-visible {
    opacity: 1;
}

.slide-up {
    transform: translateY(30px);
}

.slide-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Media Queries --- */
@media (max-width: 900px) {
    .main-nav {
        display: none; /* Hamburger menu needed for mobile in future iterations */
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    /* Mobile Accordion */
    .products-accordion {
        flex-direction: column;
        height: 650px;
    }
    
    
    .accordion-item {
        border-right: none;
        border-bottom: 1px solid var(--clr-border);
    }
    
    .accordion-item:last-child {
        border-bottom: none;
    }
}

@media (max-width: 600px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }

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