/* ==========================================================================
   Variables y Configuración Base
   ========================================================================== */
:root {
    /* Colores extraídos de la marca */
    --color-purple: #75258f;
    --color-green: #4cab54;
    
    /* Paleta Apple-like */
    --color-bg: #fbfbfd;
    --color-text: #1d1d1f;
    --color-text-light: #86868b;
    --color-white: #ffffff;
    --color-glass: rgba(255, 255, 255, 0.72);
    --color-border: rgba(0, 0, 0, 0.1);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
    
    --transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s ease;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* ==========================================================================
   Utilidades y Animaciones
   ========================================================================== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

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

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

/* ==========================================================================
   Navegación (Glassmorphism)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: background var(--transition-fast);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-purple);
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text);
    font-size: 0.85rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-purple);
}



/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 2rem;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, rgba(117,37,143,0.08) 0%, rgba(76,171,84,0.05) 50%, rgba(251,251,253,0) 70%);
    z-index: -1;
    border-radius: 50%;
}

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

.hero h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.05;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--color-text-light);
    margin-bottom: 2.5rem;
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--color-purple);
    color: white;
    text-decoration: none;
    border-radius: 980px;
    font-weight: 500;
    font-size: 1.1rem;
    transition: transform var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary:hover {
    background-color: #5c1c70;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(117, 37, 143, 0.2);
}

/* ==========================================================================
   Productos Section
   ========================================================================== */
.products-section {
    padding: 8rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-header h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.25rem;
    color: var(--color-text-light);
}

.products-grid {
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

.product-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    background: var(--color-white);
    border-radius: 32px;
    padding: 3rem;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

/* Alternar diseño de tarjetas */
.product-card:nth-child(even) {
    grid-template-columns: 1fr 1fr;
}
.product-card:nth-child(even) .product-image {
    order: 2;
}

.product-image {
    aspect-ratio: 1;
    border-radius: 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.product-image::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0.1;
}

.colageno-img::before { background: var(--color-purple); }
.magnesio-img::before { background: var(--color-green); }
.plasma-img::before { background: linear-gradient(45deg, var(--color-purple), var(--color-green)); }

.product-icon {
    font-size: 5rem;
}

.colageno-img .product-icon { color: var(--color-purple); }
.magnesio-img .product-icon { color: var(--color-green); }
.plasma-img .product-icon { color: var(--color-purple); }

.product-info h3 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.product-info h4 {
    font-size: 1.25rem;
    color: var(--color-purple);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.product-info p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.benefits {
    list-style: none;
}

.benefits li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--color-text);
}

.benefits li i {
    color: var(--color-green);
    font-size: 1.25rem;
}

/* ==========================================================================
   Contacto Section
   ========================================================================== */
.contact-section {
    padding: 8rem 2rem;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.city-card {
    background: var(--color-bg);
    padding: 3rem 2rem;
    border-radius: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.city-card:hover {
    transform: translateY(-5px);
}

.city-card h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--color-text);
}

.whatsapp-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.wa-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: #25D366; /* WhatsApp brand color */
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.wa-btn:hover {
    background-color: #128C7E;
    transform: scale(1.02);
}

.wa-btn i {
    font-size: 1.5rem;
}

.social-footer {
    text-align: center;
    margin-top: 5rem;
}

.social-footer p {
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.ig-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
    text-decoration: none;
    border-radius: 980px; /* pill shape */
    font-weight: 600;
    font-size: 1.1rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
}

.ig-btn:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 20px rgba(220, 39, 67, 0.3);
    opacity: 0.95;
    color: white;
}

.ig-btn i {
    font-size: 1.4rem;
}

.nav-ig-btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.9rem;
}

.nav-ig-btn i {
    font-size: 1.1rem;
}

.footer-ig-btn {
    margin-top: 1rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-light);
    font-size: 0.85rem;
    background: var(--color-white);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
    .product-card, .product-card:nth-child(even) {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem;
    }
    
    .product-card:nth-child(even) .product-image {
        order: -1;
    }

    .nav-links {
        display: none; /* Simplificación para móvil en esqueleto */
    }
    .plasma-gallery {
        flex-direction: column;
    }
}

/* ==========================================================================
   Galería de Plasma (Animada)
   ========================================================================== */
.plasma-banner {
    width: 100%;
    margin-top: 2rem;
    background: var(--color-white);
    border-radius: 32px;
    padding: 4rem 2rem;
    box-shadow: var(--shadow-sm);
}

.plasma-header {
    text-align: center;
    margin-bottom: 3rem;
}

.plasma-header h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.plasma-header p {
    color: var(--color-purple);
    font-weight: 500;
    font-size: 1.25rem;
}

.plasma-gallery {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.image-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
    background-color: #fcfcfc;
    cursor: pointer;
}

.image-wrapper:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.plasma-img-item {
    display: block;
    width: 100%;
    max-width: 500px;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-smooth);
}

.vertical-img {
    max-width: 350px;
}

.image-wrapper:hover .plasma-img-item {
    transform: scale(1.03);
}

.image-overlay {
    position: absolute;
    bottom: -100px;
    left: 0;
    width: 100%;
    padding: 2.5rem 1rem 1.5rem 1rem;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    display: flex;
    justify-content: center;
    transition: bottom var(--transition-smooth), opacity var(--transition-smooth);
    opacity: 0;
}

.image-wrapper:hover .image-overlay {
    bottom: 0;
    opacity: 1;
}

.overlay-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background-color: #25D366; /* WhatsApp color */
    color: white;
    font-size: 1.1rem;
    padding: 0.8rem 1.5rem;
    border-radius: 980px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.overlay-btn:hover {
    background-color: #128C7E;
    transform: scale(1.05);
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.9rem;
    border-top: 1px solid rgba(0,0,0,0.09);
}