Ghost/ghost/admin/app/styles/layouts/setup.css

/* Setup New Blog /ghost/setup/
/* ---------------------------------------------------------- */

.ghost-setup {
    background: var(--darkgrey);
    color: var(--midgrey);
}

@media (max-width: 550px) {
    .ghost-setup {
        background: color(var(--darkgrey) lightness(-5%));
    }
}

.ghost-setup main {
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    padding-top: 15px;
}

@media (max-width: 550px) {
    .ghost-setup main {
        top: 0;
    }
}

.setup-box {
    display: table;
    margin: 0 auto;
    padding: 0;
    max-width: 500px;
    height: 90%;
}

.setup-form {
    padding: 40px;
    max-width: 530px;
    border-radius: 2px;
    color: color(var(--midgrey) lightness(+15%));
}

@media (max-width: 400px) {
    .setup-form {
        padding: 15px;
    }
}

@media (min-width: 551px) {
    .setup-form {
        background: color(var(--darkgrey) lightness(-5%));
    }
}

.setup-form header {
    margin-bottom: 30px;
}

.setup-form label {
    color: var(--lightgrey);
    font-weight: 300;
}

@media (max-width: 550px) {
    .setup-form label {
        width: 100%;
    }
}

.setup-form .form-group input {
    padding: 7px;
    border: none;
    background: color(var(--darkgrey) lightness(+10%));
    color: #fff;
    transition: background 0.25s ease;
}

.setup-form .form-group input:focus {
    border: none;
    background: color(var(--darkgrey) lightness(+15%));
}

.setup-form input:-webkit-autofill {
    /* Chrome auto-fill style */
    -webkit-box-shadow: 0 0 0 1000px var(--lightgrey) inset !important;
}

.setup-form h1 {
    margin: 0;
    color: var(--lightgrey);
    letter-spacing: 0;
    font-size: 26px;
    font-weight: 200;
}

@media (max-width: 400px) {
    .setup-form h1 {
        font-size: 18px;
    }
}

@media (max-width: 550px) {
    .setup-form h1 {
        font-size: 20px;
    }
}

.setup-form h2 {
    margin: 6px 0 0 0;
    padding: 0;
    border: none;
    color: var(--midgrey);
    letter-spacing: 0;
    font-size: 16px;
    font-weight: 200;
}

@media (max-width: 400px) {
    .setup-form h2 {
        font-size: 12px;
    }
}

@media (max-width: 550px) {
    .setup-form h2 {
        font-size: 14px;
    }
}

.setup-form p {
    color: var(--midgrey);
    font-size: 12px;
    line-height: 1.4em;
}

.setup-form footer {
    margin: 30px 0 5px 0;
}

.setup-form .btn-green {
    padding: 0.9em 1.8em;
    width: 100%;
    font-size: 13px;
}