.author:first-letter {
    color: red;
}

.container {
    display: flex;
    margin: 0 auto !important;
    width: 90%;
}

pre.callstack,
pre.code {
    height: 100%;
    min-height: 315px;
}

pre.callstack,
.container pre,
pre.callback-queue {
    background-color: #f8f8f8; /* костыль */
}

pre.callstack {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    margin-left: 20px;
    background-image: url("/lib/img/arrow-up.png");
    background-repeat: no-repeat;
    background-position: 90%;
}

pre.callstack::before {
    position: absolute;
    top: 0;
    left: 5px;
    opacity: 0.5;
    content: 'Стек вызовов';
}

pre.callstack span {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    margin-top: 5px;
    border: solid 1px black;
    background-color: #ccffff;
}

.console::before {
    display: block;

    text-align: center;
    font-size: 20px;
    line-height: initial;

    color: black;
    content: 'Console';

    background-image: url("/lib/img/mac-os-x-buttons.png");
    background-color: #d6d6d6;
    background-repeat: no-repeat;
    background-position-y: center;

    border-left: 8px solid #d6d6d6;
}

mark {
    color: black;

    background-color: lightskyblue;
}

pre.callback-queue {
    display: flex;
    align-items: center;
    height: 40px;
    background-image: url("/lib/img/arrow-right.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 150px 30px;
}

pre.callback-queue::before {
    position: absolute;
    top: 5px;
    right: 10px;
    opacity: 0.5;
    content: 'Очередь событий';
}

pre.callback-queue span {
    margin-right: 5px;
    padding: 5px 10px;
    border: solid 1px black;
    background-color: #ccffff;
}

.clock {
    position: absolute;
    top: -30px;
    right: 5%;
}

.API {
    position: absolute;
    top: -30px;
    right: 5%;
    font-size: 37px !important;
}

.clock::before {
    content: '⏰ ';
}

.no-uppercase {
    text-transform: none !important;
}

.definition {
    text-align: left;
}

.setInterval,
.setTimeout,
.trouble,
.NodeJS {
    width: 100%;
    border: none !important;
    box-shadow: none !important;
}

.gif {
    display: block;
    width: 80%;
    margin: 0 auto !important;
    border: none !important;
    box-shadow: none !important;
}

.small-code {
    font-size: 18px !important;
}

.loader-gif {
    position: relative;
    top: 5px;
    width: 35px;
    margin: 0 !important;
    border: none !important;
    box-shadow: none !important;
}

.button {
    background-color: black;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

.off-min-height {
    min-height: max-content !important;
}

.JS {
    width: 70%;
    border: none !important;
    box-shadow: none !important;
}

.cover h3,
.cover small {
    color: #fff;
}