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

body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
}
.custom{  width: 580px;
  background: #333;
}

/* MENÚ PRINCIPAL */
.menu {
    width: 100%;
    background: #111;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    height: 70px;
}

/* LOGO */
.logo {
    width: 100%;
	 background:red;
}
.galeria{
    width: 100%;
	 background:red;
}
/* LISTA PRINCIPAL */
.menu-principal {
    list-style: none;
    display: flex;
    align-items: center;
}

.menu-principal > li {
    position: relative;
}

.menu-principal > li > a {
    display: block;
    padding: 25px 18px;
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: 0.3s;
}

/* EFECTO AL PASAR EL MOUSE */
.menu-principal > li > a:hover {
    background: #333;
    color: #00d9ff;
}

/* SUBMENÚ */
.submenu {
    position: absolute;
    top: 70px;
    left: 0;
    width: 210px;
    background: white;
    list-style: none;

    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);

    transition: 0.3s;

    box-shadow: 0 5px 15px rgba(0,0,0,0.25);
    z-index: 1000;
}

/* MOSTRAR SUBMENÚ */
.dropdown:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ELEMENTOS DEL SUBMENÚ */
.submenu li {
    border-bottom: 1px solid #eee;
}

.submenu li a {
    display: block;
    padding: 15px;
    color: #333;
    text-decoration: none;
    transition: 0.3s;
}

/* HOVER SUBMENÚ */
.submenu li a:hover {
    background: #111;
    color: #00d9ff;
}
@media (max-width: 768px) {
.logo {
    width: 100%;
	 background:red;
}
.galeria{
    width: 100%;
	 background:red;
}
    .menu {
        flex-direction: column;
        height: auto;
        padding: 15px;
    }

    .menu-principal {
        width: 100%;
        flex-direction: column;
    }

    .menu-principal > li {
        width: 100%;
        text-align: center;
    }

    .menu-principal > li > a {
        padding: 15px;
    }

    .submenu {
        position: static;
        width: 100%;
        display: none;
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    .dropdown:hover .submenu {
        display: block;
    }
	.custom{ width:  width: 580px;
  background: #333;
}
}