*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Open Sans';
    font-size: 16px;
    font-style: normal;
    font-weight: 300;
    color: #D8D8D8;
    line-height: 1.3;
}

a {
    color: inherit;
    text-decoration: none;
}

.topbar {
    width: 100%;
    /*height: 100px;*/
    background-color: rgba(191, 161, 159, 0.8);
}

.topbar-container {
    max-width: 1130px;
    margin-left: auto;
    margin-right: auto;
}

.topbar-title {
    display: block;
    text-align: center;
    font-size: 36px;
    padding: 10px 0;
    color: #FFF;
}

.topbar-nav {
    text-align: center;
    padding-bottom: 16px;
}

.topbar-nav a {
    display: inline-block;
    margin: 0 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s;
}

.topbar-nav a.active,
.topbar-nav a:hover {
    color: #FFF;
}

.main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.main-header {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px;
    text-align: center;
    max-width: 575px;
    margin-left: auto;
    margin-right: auto;
}

.main-header-title {
    color: #222;
    font-size: 36px;
    margin-bottom: 25px;
}

.main-header-body {
    color: #777;
}

.users-profil {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    margin: 0 40px 50px;
    margin-bottom: 50px;
}

.card-name {
    color: #000;
    margin-top: 20px;
}

.main-footer {
    background-color: rgba(216, 216, 216, 0.14);
    width: 100%;
    display: flex;
    justify-content: center;
    text-align: center;
}

.main-footer .contents {
    margin: 137px 50px;
    max-width: 1000px;
}

.main-footer-sentence {
    font-size: 36px;
    margin-bottom: 20px;
    color: #000;
    
}

.main-footer-author {
    font-size: 20px;
    color: #000;
    float: right;
}


@media only screen and (max-width: 339px) {
    .topbar-nav a {
        margin: 0 9px;
    }
}

@media only screen and (max-width: 425px) {
    .main-footer .contents {
        margin: 100px 25px;
    }
}

@media only screen and (min-width: 690px) {
    .topbar {
        height: 100px;
    }
    .topbar-container {
        display: flex;
        height: 100%;
        justify-content: space-between;
        align-items: center;
        padding: 0 25px;
    }
    .topbar-title,
    .topbar-nav {
        padding: 0;
    }
    .topbar-nav a {
        margin: 0 37px;
    }
}

@media only screen and (max-width: 730px) {
    .main-footer-author {
        float: none;
    }
}