* {
    box-sizing: border-box;
}

html, body {
    border: 0;
    margin: 0;
    font-family: Arial;
    color: #666;
    overflow: hidden;
}


body {
    display: grid;
    width: 100vw;
    height: 100vh;
    background: url("../img/background.png") center center no-repeat;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
}

main {
    background-color: #EFEFEF;
    justify-self: center;
    align-self: center;
    width: 720px;
    padding: 20px;
    text-align: center;
    border-radius: 5px;
}

header {
    display: grid;
    margin-bottom: 15px;
}

header picture img {
    height: 75px;
}

section + section {
    margin-top: 15px;
}

section#main-page ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

form {
    margin: auto;
    width: 50%;
}

table {
    overflow-y: scroll;
    height: 250px;
    display: block;
}