header {
    display: flex;
}

.title {
    margin-left: 25px;
    font-size: 30px;
    font-weight: bold;
    margin-right: auto;
}

.logo {
    margin-left: auto;
    width: 300px;
    height: 48px;
    background: url(https://www.yatex.org/gitbucket/utaka0416/AegisforEcosystem/raw/master/leaflet-old/material/emblem.png);
}

.kensaku {
    width: 300px;
    height: 50px;
    margin-top: auto;
    margin-left: 50px;
    margin-bottom: 7px;
}

input[type=search] {
    width: 150px;
    height: 50px;
}

input[type=submit] {
    width: 60px;
    height: 50px;
}


nav {
    border-top: 10px solid #228b22;
    background: #3cb371;
    margin-bottom: 15px;
}

nav ul {
    overflow: hidden;
    list-style: none;
    margin: 0 auto;
    padding: 0;
}

nav li {
    box-sizing: border-box;
    float: left;
    border-right: 1px solid #228b22;
    width: 16.5%;
}

nav li:last-child {
    border-right: none;
}

nav li a {
    display: block;
    padding: 14px 0;
    width: 100%;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    color: #ffffff;
}

nav li a:hover {
    background: #228b22;
}

nav li a.imakoko {
    background: #228b22;
}