@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@500;700&family=Roboto:wght@300;400&display=swap');

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

body {
    font-family: 'Roboto', sans-serif;
    /* Fondo con imagen de textura de madera o concreto sutil */
    background: #222 url('https://images.unsplash.com/photo-1513694203232-719a280e022f?q=80&w=2069&auto=format&fit=crop') no-repeat center center/cover;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    overflow: hidden;
}

/* Capa oscura para que el texto se lea bien */
.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 0;
}

.container {
    position: relative;
    z-index: 1;
    padding: 20px;
}

.brand-name {
    font-family: 'Oswald', sans-serif;
    font-size: clamp(2.5rem, 10vw, 5.5rem);
    text-transform: uppercase;
    color: #ff9f1c; /* Naranja tipo "construcción/seguridad" */
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.main-title {
    font-size: clamp(1rem, 4vw, 1.8rem);
    font-weight: 300;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.divider {
    width: 80px;
    height: 4px;
    background-color: #ff9f1c;
    margin: 0 auto 30px;
}

.sub-titulo {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 20px;
    border-radius: 5px;
}

/* Botón WhatsApp - Inferior Derecho con Dorado y Verde */
.whatsapp-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 65px;
    height: 65px;
    background-color: #25d366;
    border: 3px solid #ff9f1c; /* Combinamos con el naranja/dorado de la marca */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    z-index: 999;
    transition: all 0.3s ease;
    animation: pulse 2s infinite;
}

.whatsapp-btn svg {
    width: 35px;
    height: 35px;
    fill: white;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 159, 28, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(255, 159, 28, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 159, 28, 0); }
}

@media (max-width: 768px) {
    .whatsapp-btn { bottom: 20px; right: 20px; width: 55px; height: 55px; }
}