/* 1. RESET Y ESTILOS BASE */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primario: #222222; /* Gris piedra */
    --secundario: #bd7b31; /* Tono arena/tierra */
    --fondo-claro: #f9f9f9;
    --blanco: #ffffff;
    --texto: #333333;
    --transicion: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--texto);
    background-color: var(--blanco);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative; /* Necesario para el mega menú */
}

img {
    max-width: 100%;
    display: block;
}

/* 2. HEADER Y NAVEGACIÓN */
.main-header {
    background: transparent;
    padding: 30px 0;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    min-height: 100px;
    background-color: rgba(0,0,0,0.8);
    transition: all 0.4s ease;
}

.main-header.scrolled {
    background: rgba(2, 2, 2, 0.7);
    padding: 20px 0;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 60px;
    transition: var(--transicion);
}

.main-nav ul {
    display: flex;
    list-style: none;
}

.main-nav ul li a {
    text-decoration: none;
    color: var(--blanco);
    font-weight: 600;
    margin-left: 30px;
    transition: var(--transicion);
    text-transform: uppercase;
    font-size: 1rem;
}

.main-nav ul li a:hover {
    color: var(--secundario);
}

/* --- LÓGICA DE MEGA MENÚ (ESTILO ARIVAL) --- */

/* Permitir que el submenú se abra en todo el ancho del container */
.main-nav ul li.has-submenu {
    position: static; 
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0.98);
    display: flex;
    justify-content: center;
    padding: 40px 20px;
    list-style: none;
    border-bottom: 3px solid var(--secundario);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    transform: translateY(10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.main-nav ul li:hover > .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Columnas del Mega Menú */
.submenu > li.has-inner-submenu {
    flex: 1;
    max-width: 250px;
    padding: 0 20px;
    border-right: 1px solid rgba(255,255,255,0.1);
}

.submenu > li.has-inner-submenu:last-child {
    border-right: none;
}

/* Títulos de categorías (Areniscas, Calizas...) */
.submenu > li.has-inner-submenu > a {
    color: var(--secundario) !important;
    font-size: 1.1rem !important;
    font-weight: 700 !important;
    margin-bottom: 15px !important;
    margin-left: 0 !important;
    padding: 0 !important;
    display: block;
    pointer-events: none;
}

/* Lista de productos dentro de la columna */
.inner-submenu {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    position: static !important;
    background: transparent !important;
    padding: 0 !important;
    list-style: none;
    transform: none !important;
    border: none !important;
}

.inner-submenu li a {
    margin-left: 0 !important;
    padding: 8px 0 !important;
    font-size: 0.9rem !important;
    color: #bbb !important;
    text-transform: none !important;
    font-weight: 400 !important;
}

.inner-submenu li a:hover {
    color: var(--blanco) !important;
    background: transparent !important;
    text-decoration: underline;
}