/* --- CONFIGURACIÓN GENERAL --- */
body { 
    font-family: 'Segoe UI', sans-serif; 
    margin: 0; 
    line-height: 1.6; 
    color: #333; 
    background-color: #f4f7f6; 
    scroll-behavior: smooth; 
}

/* --- NAVEGACIÓN --- */
header { 
    background: #2c3e50; 
    color: white; 
    padding: 1rem 0; 
    position: fixed; 
    width: 100%; 
    top: 0; 
    z-index: 1000; 
}
nav { 
    display: flex; 
    justify-content: space-around; 
    align-items: center; 
    max-width: 1100px; 
    margin: auto; 
}
nav a { 
    color: white; 
    text-decoration: none; 
    font-weight: bold; 
    margin: 0 15px; 
}

/* --- BANNER PRINCIPAL --- */
.page-banner {
    background: linear-gradient(rgba(44, 62, 80, 0.8), rgba(41, 128, 185, 0.8)), 
                url('https://assets.nabaliaenergia.com/site/blog/sabes-lo-que-es-el-icp-de-electricidad.jpg');
    background-size: cover;
    background-position: center;
    height: 350px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
    margin-top: 50px;
}

/* --- SECCIÓN TEXTOS --- */
.content-section { max-width: 1000px; margin: 40px auto; padding: 0 20px; }
.service-list { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
    gap: 20px; 
    margin-top: 30px; 
}
.service-item { 
    background: white; 
    padding: 25px; 
    border-left: 5px solid #f1c40f; 
    border-radius: 8px; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); 
    transition: transform 0.3s; 
}
.service-item:hover { transform: scale(1.02); }
.service-item h3 { margin-top: 0; color: #2c3e50; }

/* --- CARRUSEL DE IMAGEN ÚNICA --- */
.trabajos-fotos { background: #2c3e50; padding: 60px 20px; color: white; text-align: center; }

.carousel-container {
    position: relative;
    max-width: 850px;
    height: 450px;
    margin: 30px auto;
    overflow: hidden;
    border-radius: 12px;
    background: #000;
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}

.carousel-track { display: flex; height: 100%; transition: transform 0.5s ease-in-out; }
.carousel-slide { min-width: 100%; height: 100%; display: flex; justify-content: center; align-items: center; }
.carousel-slide img { max-width: 100%; max-height: 100%; object-fit: contain; }

/* --- SECCIÓN VÍDEOS (TAMAÑO IGUAL) --- */
.video-section { padding: 60px 20px; max-width: 1000px; margin: auto; text-align: center; }
.video-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); 
    gap: 30px; 
    margin-top: 30px; 
}
video { 
    width: 100%; 
    aspect-ratio: 16 / 9; /* Obliga a todos a tener la misma proporción */
    object-fit: cover;    /* Evita que el vídeo se estire feo */
    border-radius: 12px; 
    box-shadow: 0 5px 15px rgba(0,0,0,0.2); 
    background: #000; 
}

/* --- BOTONES --- */
.carousel-btn {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(41, 128, 185, 0.9); color: white; border: none;
    width: 45px; height: 45px; cursor: pointer; font-size: 20px; z-index: 10; border-radius: 50%;
}
.prev { left: 15px; } .next { right: 15px; }

footer { background: #2c3e50; color: white; text-align: center; padding: 25px 0; margin-top: 50px; }