html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    height: 8%;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
}

header > ul {
    height: 100%;
    width: 100%;
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    list-style: none;
    background: #27348b;
    margin: 0;
    padding: 0;
}

header > ul > li > a {
    text-decoration: none;
    color: #ffffff;
}

main {
    flex: 1;
    box-sizing: border-box;
    position: relative;
}

.image {
    height: 100%;
    width: 100%;
    object-fit: cover;
    display: block;
}

footer {
    height: 12%;
    width: 100%;
    display: flex;
    align-items: center;
    position: relative;
    background: #eaeaea;
    padding: 1rem;
    text-align: center;
    box-sizing: border-box;
    box-shadow: 0 -4px 10px -4px rgba(0,0,0,0.3);
}

.container-logo-fletes {
    margin-left: 2%;
    width: 8.5%;
}

.container-logo-pemex {
    margin-left: 1%;
    width: 18%;
}

footer > button {
    position: absolute;
    top: 0;
    right: 1%;
    background: #ffffff;
    border: 0;
}

.item-selected-nav { font-weight: bold; }