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

/* Error /ghost/404/
/* ---------------------------------------------------------- */

.error-content {
    display: table;
    margin: 0 auto;
    padding: 0;
    max-width: 530px;
    height: 100%;
}

.error-content {
    user-select: text;
}

@media (max-width: 630px) {
    .error-content {
        max-width: 264px;
        text-align: center;
    }
}

.error-details {
    display: table-cell;
    vertical-align: middle;
}

.error-image {
    display: inline-block;
    width: 96px;
    height: 150px;
    vertical-align: middle;
}

@media (max-width: 630px) {
    .error-image {
        width: 72px;
        height: 112px;
    }
}

.error-image img {
    width: 100%;
    height: 100%;
}

.error-message {
    position: relative;
    top: -5px;
    display: inline-block;
    margin-left: 10px;
    vertical-align: middle;
}

.error-code {
    margin: 0;
    color: #979797;
    font-size: 7.8em;
    line-height: 0.9em;
}

@media (max-width: 630px) {
    .error-code {
        font-size: 5.8em;
    }
}

.error-description {
    margin: 0;
    padding: 0;
    border: none;
    color: #979797;
    font-size: 1.9em;
    font-weight: 300;
}

@media (max-width: 630px) {
    .error-description {
        font-size: 1.4em;
    }
}


/* Stack trace
/* ---------------------------------------------------------- */

.error-stack {
    margin: 1em auto;
    padding: 2em;
    max-width: 800px;
    background-color: rgba(255, 255, 255, 0.3);
}

.error-stack-list {
    margin: 0;
    padding: 0;
    list-style-type: none;
}

.error-stack-list li {
    display: block;
}

.error-stack-list li:before {
    content: "\21AA";
    display: inline-block;
    margin-right: 0.5em;
    color: #bbb;
    font-size: 1.2em;
}

.error-stack-function {
    font-weight: bold;
}