:root {
    --gris-menu: #e9ecef;
    --texto-menu: #333333;
    --turquesa-kore: #40E0D0;
    --terracota: #E2725B;
    --gris-induskore: #8c979f;
    --metal-gradient: linear-gradient(135deg, rgba(189, 195, 199, 0.8) 0%, rgba(44, 62, 80, 0.9) 100%);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(rgba(244, 244, 244, 0.7), rgba(244, 244, 244, 0.7)), 
                url('imagenes/cadena-produccion.jpg') no-repeat center center fixed;
    background-size: cover;
    color: #333;
}

header {
    background-color: var(--gris-menu);
    padding: 15px 5%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

@media (min-width: 768px) {
    header { flex-direction: row; justify-content: space-between; }
}

.logo img { height: 45px; }

nav ul { list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }

nav a {
    text-decoration: none;
    color: var(--texto-menu);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease; /* Transición suave */
}

/* EFECTO HOVER MENÚ RECUPERADO */
nav a:hover {
    color: var(--turquesa-kore);
}

nav a.active { background-color: var(--terracota); color: white !important; }

.page-banner {
    background: var(--metal-gradient);
    color: white;
    padding: 40px 5%;
    text-align: center;
    position: relative; 
    overflow: hidden;   
}

.page-banner h1 { 
    font-size: 1.8rem;
    text-transform: uppercase;
    z-index: 5;
    position: relative;
    margin-bottom: 10px;
}

@media (min-width: 768px) {
    .page-banner { padding: 80px 10%; }
    .page-banner h1 { font-size: 3.2rem; }
}

.scanner-light {
    position: absolute;
    bottom: 0; left: -100%;
    width: 40%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--turquesa-kore), #ffffff, var(--turquesa-kore), transparent);
    animation: induskoreOneScan 2.5s ease-out 1 forwards;
}

@keyframes induskoreOneScan {
    0% { left: -100%; opacity: 0; }
    10% { opacity: 1; }
    100% { left: 100%; opacity: 0; }
}

.container { padding: 20px 5%; }
@media (min-width: 768px) { .container { padding: 40px 10%; } }

.card {
    background: var(--gris-induskore);
    padding: 35px;
    margin-bottom: 30px;
    border-radius: 15px;
    border-left: 8px solid var(--turquesa-kore);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.card h2 { color: white; margin-bottom: 15px; text-transform: uppercase; }
.card p { color: #f8f8f8; margin-bottom: 20px; font-size: 1.1rem; }

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 25px 0;
}

@media (min-width: 768px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

.grid-item {
    background: white;
    padding: 25px;
    border-radius: 10px;
    border-top: 4px solid var(--turquesa-kore);
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.grid-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.2);
    border-top-color: var(--terracota);
}

.grid-item h3 { font-size: 1rem; color: var(--turquesa-kore); margin-bottom: 10px; text-transform: uppercase; }
.grid-item p { color: #444 !important; font-size: 0.95rem; line-height: 1.4; }

.section-img { width: 100%; border-radius: 8px; margin-top: 25px; box-shadow: 0 5px 15px rgba(0,0,0,0.3); }

/* FOOTER ACTUALIZADO */
footer { background: #1a1a1a; color: #999; padding: 40px 5%; text-align: center; }
.social-links { display: flex; justify-content: center; gap: 30px; margin-bottom: 25px; }

.social-btn {
    width: 70px; /* Tamaño del botón circular */
    height: 70px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex; 
    align-items: center; 
    justify-content: center;
    transition: all 0.4s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

/* Iconos más grandes y centrados */
.social-btn img { 
    height: 45px; /* Más grande para legibilidad */
    width: 45px; 
    object-fit: contain; 
    display: block;
}

/* EFECTO HOVER FOOTER RECUPERADO */
.social-btn:hover { 
    background: rgba(255, 255, 255, 0.2); 
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 0 20px rgba(64, 224, 208, 0.3);
    border-color: var(--turquesa-kore);
}