:root {
    --rojo-marca: #D91A1A;
    --rojo-hover: #B31515;
    --negro-fondo: #0A0A0A;
    --gris-oscuro: #1A1A1A;
    --blanco-texto: #F5F5F5;
    
    --fuente-titulos: 'Manrope', sans-serif;
    --fuente-textos: 'Inter', sans-serif;
}

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

body {
    font-family: var(--fuente-textos);
    font-weight: 400; /* Especificación exacta: Inter Regular */
    background-color: var(--negro-fondo);
    color: var(--blanco-texto);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3 { 
    font-family: var(--fuente-titulos); 
    font-weight: 700; 
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 14px 28px;
    font-family: var(--fuente-textos);
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primario {
    background-color: var(--rojo-marca);
    color: #fff;
}

.btn-primario:hover {
    background-color: var(--rojo-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(217, 26, 26, 0.3);
}

.btn-secundario {
    background-color: transparent;
    color: #fff;
    border: 1px solid var(--rojo-marca);
}

.btn-secundario:hover {
    background-color: rgba(217, 26, 26, 0.1);
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

header {
    padding: 15px 0;
    background-color: rgba(10, 10, 10, 0.95);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #222;
}

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

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

.logo img {
    max-height: 85px;
    width: auto;
    transition: transform 0.3s ease, filter 0.3s ease;
    
    filter: brightness(1.5); 
}

.logo img:hover {
    transform: scale(1.03); 
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(rgba(10,10,10,0.8), rgba(10,10,10,0.9)), url('fondo-hero.jpg') center/cover;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    max-width: 600px;
    color: #ccc;
}

.laboratorio {
    padding: 100px 0;
    background-color: var(--gris-oscuro);
}

.lab-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.imagen-placeholder {
    width: 100%;
    height: 400px;
    background-color: #333;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    border: 1px dashed #555;
}

.producto {
    padding: 100px 0;
    text-align: center;
    background-color: var(--negro-fondo);
}

.producto h2 { 
    margin-bottom: 50px; 
    font-size: 2.5rem; 
}

.producto-card {
    background-color: var(--gris-oscuro);
    padding: 40px;
    border-radius: 8px;
    max-width: 800px;
    margin: 0 auto;
    border-top: 4px solid var(--rojo-marca);
}

.producto-card h3 { 
    font-size: 1.8rem; 
    margin: 20px 0; 
}

footer {
    background-color: #000;
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid #222;
}

@media (max-width: 768px) {
    .logo img { 
        max-height: 60px; 
    }
    
    .hero h1 { 
        font-size: 2.5rem; 
    }
    
    .lab-grid { 
        grid-template-columns: 1fr; 
    }
    
    .botones-hero { 
        display: flex; 
        flex-direction: column; 
        gap: 15px; 
    }
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.feature-item {
    background-color: var(--gris-oscuro);
    padding: 25px;
    border-radius: 6px;
    border-top: 3px solid #333;
    transition: border-color 0.3s ease;
    text-align: left;
}

.feature-item:hover {
    border-top-color: var(--rojo-marca);
}

.feature-item h4 {
    color: #fff;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.feature-item p {
    color: #999;
    font-size: 0.95rem;
    line-height: 1.5;
}

.contacto-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    text-align: left;
    margin-top: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background-color: var(--gris-oscuro);
    border: 1px solid #333;
    border-radius: 4px;
    color: #fff;
    font-family: var(--fuente-textos);
    font-size: 1rem;
}

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

.info-item {
    margin-bottom: 25px;
    background-color: var(--gris-oscuro);
    padding: 20px;
    border-radius: 6px;
}

.redes-sociales a {
    display: block;
    color: #ccc;
    text-decoration: none;
    margin-bottom: 10px;
    padding-left: 15px;
    border-left: 2px solid #444;
    transition: all 0.3s ease;
}

.redes-sociales a:hover {
    color: #fff;
    border-left-color: var(--rojo-marca);
}

@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contacto-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}
.carousel-container {
    width: 100%;
    overflow: hidden;
    position: relative;
    border-radius: 4px;
}

.carousel-track {
    display: flex;
    transition: transform 0.6s ease-in-out; 
    width: 100%;
}

.carousel-slide {
    min-width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: cover; 
    border-radius: 4px;
}