@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400&display=swap');

:root {
    --bg-dark: #050505;
    --bg-light: #ffffff;
    --bg-surface: #111111;
    --accent: #00f2ff; /* Keeping brand cyan as accent */
    --accent-dim: rgba(0, 242, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-dim: rgba(255, 255, 255, 0.5);
    --border: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(20, 20, 20, 0.6);
    --transition-slow: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-premium: 0 20px 50px rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html.lenis {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

.lenis.lenis-scrolling iframe {
  pointer-events: none;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* --- Custom Cursor --- */
.cursor {
    width: 20px;
    height: 20px;
    background: var(--accent);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    mix-blend-mode: difference;
    transition: transform 0.1s ease;
}

.cursor-follower {
    width: 40px;
    height: 40px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.15s ease, width 0.3s ease, height 0.3s ease;
}

/* --- Typography --- */
h1, h2, h3, .serif {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    line-height: 1.1;
}

h1 { font-size: clamp(3rem, 8vw, 6.5rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(2.5rem, 6vw, 5rem); letter-spacing: -0.02em; margin-bottom: 2rem; }
h3 { font-size: clamp(1.5rem, 3vw, 2.5rem); }

.accent-text {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    font-size: 0.8rem;
    color: var(--accent);
    display: block;
    margin-bottom: 1rem;
}

p { color: var(--text-secondary); font-size: 1.1rem; }

/* --- Layout --- */
.container {
    width: 100%;
    max-width: 100%;
    padding: 0 5vw;
}

section {
    padding: 10vh 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    border-bottom: 1px solid var(--border);
    background: radial-gradient(circle at 80% 20%, rgba(0, 242, 255, 0.03) 0%, transparent 40%);
}

.full-screen-section {
    padding: 0;
}

/* --- Navigation --- */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 2rem 5vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-slow);
}

nav.scrolled {
    padding: 1rem 5vw;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(20px);
}

.logo img { height: 80px; transition: var(--transition-fast); }

.nav-links { 
    display: flex; 
    gap: 2.5rem; 
    list-style: none; 
    align-items: center;
}
.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    opacity: 0.6;
    transition: var(--transition-fast);
}
.nav-links a:hover { opacity: 1; color: var(--accent); }

/* --- Cart Navigation --- */
@media (min-width: 1025px) {
    .cart-nav-item {
        margin-left: auto;
    }
}

.cart-btn {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

#cart-count {
    background: var(--accent);
    color: #000;
    font-size: 0.65rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -10px;
    right: -10px;
}

/* --- Hero --- */
.hero {
    height: 100vh;
    overflow: hidden;
    background: #000;
    padding-top: 120px; /* Account for fixed header */
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
    filter: saturate(0.8);
}

.hero-content {
    position: relative;
    z-index: 100;
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
    background: radial-gradient(circle at center, rgba(0, 242, 255, 0.1) 0%, transparent 70%);
    padding: 4rem;
}

.nav-content {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hero p { max-width: 700px; margin: 2rem auto 0; font-size: 1.25rem; }

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 1.5rem 4rem;
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.8rem;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
    transition: var(--transition-fast);
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent);
    transition: var(--transition-slow);
    z-index: -1;
}

.btn:hover { color: #000; }
.btn:hover::before { left: 0; }

.btn-small {
    padding: 0.8rem 2rem;
    font-size: 0.7rem;
    margin-top: 0;
}

/* --- Stats --- */
/* --- Categories Grid --- */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 4rem;
}

.category-card {
    position: relative;
    height: 500px;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-slow);
}

.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.category-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 3rem 2rem;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
    z-index: 2;
}

.category-card:hover img {
    transform: scale(1.1);
}

.category-card:hover {
    box-shadow: var(--shadow-premium);
}

/* --- Product Cards --- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.product-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-fast);
    border-radius: 4px;
}

.product-image {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: contain;
    margin-bottom: 2rem;
    transition: var(--transition-fast);
}

.product-card:hover {
    border-color: var(--accent);
    transform: translateY(-10px);
    box-shadow: var(--shadow-premium);
}

.product-card:hover .product-image {
    transform: scale(1.05);
}

.product-name {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.product-price {
    font-size: 1.1rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

/* --- Face Shape Guide --- */
.face-shape-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.shape-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 3rem 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: var(--transition-fast);
}

.shape-item:hover {
    border-color: var(--accent);
    background: var(--accent-dim);
}


/* --- Purchase Flow --- */
.flow-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.flow-step {
    text-align: center;
    position: relative;
    padding-bottom: 2rem;
}

.flow-step h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.flow-step p {
    font-size: 0.8rem;
    opacity: 0.7;
    margin-bottom: 1.5rem;
}

.step-number {
    font-size: 3.5rem;
    font-family: 'Playfair Display', serif;
    color: var(--accent-dim);
    position: absolute;
    top: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: -1;
    opacity: 0.3;
}

.step-number-bottom {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    margin-top: auto;
    letter-spacing: 0.2em;
}

/* --- Trust Section --- */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    text-align: center;
    margin-top: 4rem;
}

.trust-item i {
    font-size: 2.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    display: block;
}
.card h3 { margin-bottom: 1.5rem; }

/* --- Image/Text Split --- */
.image-text-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 0;
}

.split-image-container {
    height: 70vh;
    overflow: hidden;
    padding: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.split-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: var(--shadow-premium);
}

.split-text-content {
    padding: 5vw;
}

.csa-logo {
    max-width: 200px;
    margin-bottom: 2rem;
    filter: brightness(1.2);
}

/* --- Exam List --- */
.exam-list {
    list-style: none;
    margin-top: 3rem;
}

.exam-item {
    padding: 2rem 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    transition: var(--transition-fast);
}

.exam-item:hover { color: var(--accent); letter-spacing: 0.05em; }
.exam-item::after { content: ''; display: none; }

/* --- Evaluation Grid --- */
.eval-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.eval-grid img {
    width: 100%;
    aspect-ratio: 4/5;
    object-fit: cover;
    filter: grayscale(1);
    transition: var(--transition-slow);
}

.eval-grid img:hover { filter: grayscale(0); transform: scale(1.05); }

/* --- Contact Section --- */
.contact-section { background: #000; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; }

.contact-info { padding: 10vw; border-right: 1px solid var(--border); }
.contact-form-container { padding: 10vw; }

.form-group { margin-bottom: 2rem; position: relative; }
.form-group input, .form-group textarea {
    width: 100%;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    color: #fff;
    font-size: 1.1rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-group label {
    position: absolute;
    top: 1rem;
    left: 0;
    pointer-events: none;
    transition: var(--transition-fast);
    opacity: 0.5;
}

.form-group input:focus ~ label,
.form-group input:valid ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:valid ~ label {
    top: -1rem;
    font-size: 0.75rem;
    color: var(--accent);
    opacity: 1;
}

/* --- Modal --- */
.modal {
    display: none;
    position: fixed;
    z-index: 3000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.95);
    backdrop-filter: blur(30px);
}

.modal-content {
    margin: 5% auto;
    width: 90%;
    max-width: 800px;
    padding: 10vh 5vw;
}

.close-modal {
    position: absolute;
    right: 5vw;
    top: 5vh;
    font-size: 3rem;
    cursor: pointer;
    font-weight: 200;
}

/* --- WhatsApp Float --- */
.whatsapp-float {
    position: fixed;
    bottom: 3rem;
    right: 3rem;
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.3);
    transition: var(--transition-fast);
}

.whatsapp-float:hover { transform: scale(1.1) translateY(-5px); }
.whatsapp-float img { 
    width: 30px; 
    filter: brightness(3) drop-shadow(0 0 10px rgba(37, 211, 102, 0.5));
}

/* Hide carousel buttons on desktop */
.carousel-btn { display: none; }
[data-scroll] {
    transition: var(--transition-slow);
}

[data-scroll].is-inview {
    opacity: 1;
    transform: translateY(0);
}

/* --- Proceso Grid --- */
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 5rem;
    gap: 2rem;
}

.menu-toggle {
    display: none;
    width: 30px;
    height: 20px;
    position: relative;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: #fff;
    position: absolute;
    transition: 0.3s;
}

.menu-toggle span:nth-child(1) { top: 0; }
.menu-toggle span:nth-child(2) { top: 9px; }
.menu-toggle span:nth-child(3) { top: 18px; }

.menu-toggle.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* --- Lentes Marquee --- */
#lentes {
    position: relative;
    overflow: hidden;
    padding: 20vh 0;
}

.marquee-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.marquee-track {
    display: flex;
    height: 100%;
    width: max-content;
    animation: marquee 60s linear infinite;
}

.marquee-track img {
    height: 100%;
    width: 60vw;
    object-fit: cover;
    opacity: 0.4;
}

.marquee-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--bg-dark) 0%, transparent 20%, transparent 80%, var(--bg-dark) 100%);
    z-index: 2;
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* --- Mobile Excellence --- */
@media (max-width: 1024px) {
    .nav-content { padding: 1rem 5vw; }
    .nav-links { 
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%; /* Full width for cleaner feel */
        height: 100vh;
        background: rgba(14, 16, 20, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 2000;
        display: flex;
        gap: 2.5rem;
    }
    .nav-links a { font-size: 1.2rem; } /* Larger targets for mobile */
    .nav-links.active { right: 0; }
    
    .menu-toggle {
        display: block;
        cursor: pointer;
        z-index: 2001;
    }

    .image-text-split { grid-template-columns: 1fr; }
    .split-image-container { height: 50vh; position: relative; }
    .split-text-content { padding: 5rem 10vw; text-align: center; }
    .contact-grid { grid-template-columns: 1fr; }
    .contact-info { border-right: none; border-bottom: 1px solid var(--border); padding: 5rem 10vw; text-align: center; }
    .contact-form-container { padding: 5rem 10vw; }
}

@media (max-width: 768px) {
    section { padding: 12vh 0; min-height: auto; } /* More breathing room */
    h1 { font-size: clamp(2.2rem, 10vw, 3.5rem); line-height: 1.1; }
    h2 { font-size: clamp(1.8rem, 8vw, 2.8rem); line-height: 1.2; text-align: center; }
    h3 { text-align: center; }
    .container { padding: 0 5vw; }
    .card { padding: 3rem 2rem; text-align: center; display: flex; flex-direction: column; align-items: center; justify-content: center; }
    .logo { 
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
    }
    .logo img { height: 50px; }
    .nav-content { padding: 0.8rem 5vw; height: 80px; }
    
    /* Center all text and headings on mobile */
    p, .accent-text, .exam-list { text-align: center; padding-left: 0; }
    .hero-content p { margin-left: auto; margin-right: auto; }
    
    .exam-list { list-style: none; margin-left: 0; padding-left: 0; }
    .exam-list li { list-style: none; }
    
    .stats-grid { 
        grid-template-columns: repeat(2, 1fr); 
        gap: 2rem; 
    }
    .stats-grid .stat-item:last-child { grid-column: span 2; }
    .stat-item { border-left: none; border-top: 1px solid var(--border); padding: 2rem 0 0 0; text-align: center; }
    .stat-number { font-size: 3.5rem; }
    
    .process-grid {
        grid-template-columns: repeat(2, 1fr) !important; /* Force 2x2 */
        gap: 3rem 1.5rem;
        text-align: center;
        margin-top: 3rem;
    }
    .process-grid .stat-item { 
        grid-column: auto !important;
        border: none; 
        padding: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .image-text-split { 
        display: flex;
        flex-direction: column;
        text-align: center;
    }
    
    .split-text-content { padding: 3rem 5vw !important; width: 100%; }
    .flow-grid, .face-shape-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }

    .eval-grid { 
        display: flex; 
        overflow-x: hidden; 
        scroll-behavior: smooth;
        gap: 0;
    }
    .eval-grid img {
        flex: 0 0 100%;
        aspect-ratio: 1/1;
        filter: grayscale(0);
    }
    .carousel-container {
        position: relative;
        width: 100%;
        margin-top: 2rem;
    }
    .carousel-btn {
        display: flex;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        background: rgba(0, 242, 255, 0.1);
        backdrop-filter: blur(10px);
        border: 1px solid var(--accent-dim);
        color: var(--accent);
        width: 44px;
        height: 44px;
        border-radius: 50%;
        align-items: center;
        justify-content: center;
        z-index: 100;
        cursor: pointer;
    }
    .carousel-btn.prev { left: 10px; }
    .carousel-btn.next { right: 10px; }

    .hero { text-align: center; display: flex; align-items: center; justify-content: center; height: 80vh; min-height: 600px; position: relative; }
    .hero-video { opacity: 0.7; } /* Slightly more visible on mobile */
    .hero-content { padding: 2rem 1.5rem; background: none; z-index: 10; }
    .hero-content h1 { margin-top: 1rem; }
    .hero-content p { font-size: 1rem; margin-top: 1.5rem; }
    
    .whatsapp-float {
        bottom: 2rem;
        right: 1.5rem;
        width: 55px;
        height: 55px;
    }

    .exam-list { text-align: center; display: inline-block; width: 100%; }
    .exam-item { justify-content: center; padding: 1.5rem 0; }
}

@media (max-width: 480px) {
    .process-grid, .flow-grid, .face-shape-grid, .product-grid {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }
    .stat-number { font-size: 2.8rem; }
    .btn { padding: 1.2rem 2.5rem; width: 100%; text-align: center; } 
    .split-image-container { height: 40vh; padding: 1rem; }
    .cart-drawer { width: 100%; }
}

/* --- Cart Drawer --- */
.cart-drawer {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(30px);
    z-index: 3000;
    transition: var(--transition-slow);
    display: flex;
    flex-direction: column;
    padding: 3rem 2rem;
    box-shadow: -10px 0 50px rgba(0,0,0,0.5);
    border-left: 1px solid var(--border);
}

.cart-drawer.active {
    right: 0;
}

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.close-cart {
    font-size: 2rem;
    cursor: pointer;
    opacity: 0.5;
    transition: var(--transition-fast);
}

.close-cart:hover {
    opacity: 1;
    color: var(--accent);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 2rem;
}

.cart-item {
    display: flex;
    gap: 1.5rem;
    padding-bottom: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.cart-item-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    background: var(--bg-surface);
    border-radius: 4px;
}

.cart-item-info {
    flex: 1;
}

.cart-item-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.cart-item-price {
    color: var(--accent);
    font-size: 0.9rem;
}

.cart-item-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
}

.qty-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: #fff;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.qty-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    z-index: 2999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-fast);
}

.cart-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.cart-footer {
    border-top: 1px solid var(--border);
    padding-top: 2rem;
}

.summary-line {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.summary-line.total {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
    margin: 1rem 0 2rem;
}

#checkout-btn {
    background: var(--accent);
    color: #000;
    border: none;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 1.2rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

#checkout-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 242, 255, 0.4);
    background: #fff;
}

#checkout-email:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(0, 242, 255, 0.2);
}

@media (max-width: 480px) {
    .cart-drawer {
        width: 100%;
        right: -100%;
    }
}