Меняем стандартный вид подсветки синтаксиса DLE 19.x - PrismJS Тёмная тема

В итоге должна получиться красивая тёмная тема, как на данном сайте.

Править нужно файл: /public/prism/prism.css

Меняем всё его содержимое на:

/* PrismJS 1.30.0 - Modern Dark Theme */
code[class*="language-"],
pre[class*="language-"] {
    color: #e9ecef;
    background: #1a1b26;
    text-shadow: none;
    font-family: 'Menlo', 'Monaco', 'Cascadia Code', 'Consolas', 'Liberation Mono', 'Courier New', monospace;
    font-size: 14px;
    text-align: left;
    white-space: pre;
    word-spacing: normal;
    word-break: normal;
    word-wrap: normal;
    line-height: 1.6;
    -moz-tab-size: 4;
    -o-tab-size: 4;
    tab-size: 4;
    -webkit-hyphens: none;
    -moz-hyphens: none;
    -ms-hyphens: none;
    hyphens: none;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

/* Selection */
code[class*="language-"] ::-moz-selection,
code[class*="language-"]::-moz-selection,
pre[class*="language-"] ::-moz-selection,
pre[class*="language-"]::-moz-selection {
    background: #3d59a1;
    color: #ffffff;
}

code[class*="language-"] ::selection,
code[class*="language-"]::selection,
pre[class*="language-"] ::selection,
pre[class*="language-"]::selection {
    background: #3d59a1;
    color: #ffffff;
}

@media print {
    code[class*="language-"],
    pre[class*="language-"] {
        text-shadow: none;
    }
}

pre[class*="language-"] {
    padding: 50px 10px 10px 16px;
    margin: 20px 0;
    overflow: auto;
    position: relative;
    border: 1px solid #2a2c3c;
    transition: all 0.3s ease;
}

pre[class*="language-"]:hover {
    border-color: #3a3c52;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

:not(pre) > code[class*="language-"],
pre[class*="language-"] {
    background: #1a1b26;
}

:not(pre) > code[class*="language-"] {
    padding: 4px 8px;
    border-radius: 6px;
    white-space: normal;
    font-size: 0.9em;
    background: #2a2c3c;
    color: #e9ecef;
    border: 1px solid #3a3c52;
}

/* Syntax Highlighting - Modern Colors */
.token.cdata,
.token.comment,
.token.doctype,
.token.prolog {
    color: #6c7086;
    font-style: italic;
}

.token.punctuation {
    color: #89ddff;
}

.token.namespace {
    opacity: 0.8;
}

.token.boolean,
.token.constant,
.token.deleted,
.token.number,
.token.property,
.token.symbol,
.token.tag {
    color: #ff9e64;
}

.token.attr-name,
.token.builtin,
.token.char,
.token.inserted,
.token.selector,
.token.string {
    color: #c3e88d;
}

.language-css .token.string,
.style .token.string,
.token.entity,
.token.operator,
.token.url {
    color: #89ddff;
}

.token.atrule,
.token.attr-value,
.token.keyword {
    color: #c099ff;
}

.token.class-name,
.token.function {
    color: #82aaff;
}

.token.important,
.token.variable {
    color: #ff757f;
}

.token.regex {
    color: #f78c6c;
}

.token.bold,
.token.important {
    color: #ffcb6b;
    font-weight: 600;
}

.token.italic {
    font-style: italic;
    color: #ffcb6b;
}

.token.entity {
    cursor: help;
    color: #ffcb6b;
}

/* Code Toolbar - Modern Style */
div.code-toolbar {
    position: relative;
    margin: 25px 0;
}

div.code-toolbar > .toolbar {
    position: absolute;
    z-index: 10;
    top: 12px;
    right: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(-10px);
}

div.code-toolbar:hover > .toolbar,
div.code-toolbar:focus-within > .toolbar {
    opacity: 1;
    transform: translateY(0);
}

div.code-toolbar > .toolbar > .toolbar-item {
    display: inline-block;
    margin-left: 8px;
}

div.code-toolbar > .toolbar > .toolbar-item > a,
div.code-toolbar > .toolbar > .toolbar-item > button,
div.code-toolbar > .toolbar > .toolbar-item > span {
    color: #a9b1d6;
    font-size: 13px;
    font-weight: 500;
    padding: 8px 16px;
    background: rgba(42, 44, 60, 0.9);
    border: 1px solid #3a3c52;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
    text-shadow: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

div.code-toolbar > .toolbar > .toolbar-item > a:focus,
div.code-toolbar > .toolbar > .toolbar-item > a:hover,
div.code-toolbar > .toolbar > .toolbar-item > button:focus,
div.code-toolbar > .toolbar > .toolbar-item > button:hover,
div.code-toolbar > .toolbar > .toolbar-item > span:focus,
div.code-toolbar > .toolbar > .toolbar-item > span:hover {
    color: #ffffff;
    background: #3d59a1;
    border-color: #3d59a1;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(61, 89, 161, 0.3);
    text-decoration: none;
}

/* Copy Button States */
.copy-to-clipboard-button[data-copy-state="copy"] {
    background: rgba(42, 44, 60, 0.9) !important;
}

.copy-to-clipboard-button[data-copy-state="copied"] {
    background: #10b981 !important;
    border-color: #10b981 !important;
    color: white !important;
}

.copy-to-clipboard-button[data-copy-state="copy-error"] {
    background: #ef4444 !important;
    border-color: #ef4444 !important;
    color: white !important;
}

/* Custom Scrollbar for Code Blocks */
pre[class*="language-"]::-webkit-scrollbar {
    height: 8px;
    width: 8px;
}

pre[class*="language-"]::-webkit-scrollbar-track {
    background: #1a1b26;
    border-radius: 0 0 12px 12px;
}

pre[class*="language-"]::-webkit-scrollbar-thumb {
    background: #3a3c52;
    border-radius: 4px;
    border: 2px solid #1a1b26;
}

pre[class*="language-"]::-webkit-scrollbar-thumb:hover {
    background: #4a4c66;
}

pre[class*="language-"]::-webkit-scrollbar-corner {
    background: #1a1b26;
}

/* Firefox Scrollbar */
pre[class*="language-"] {
    scrollbar-width: thin;
    scrollbar-color: #3a3c52 #1a1b26;
}

 

/* Custom styles for specific languages */
.token.bbcode .token.tag {
    color: #ff9e64;
}

.token.bbshortcode .token.tag {
    color: #c099ff;
}

.token.string-property.property {
    color: #c3e88d;
}

/* Line Numbers (optional) */
pre[class*="language-"].line-numbers {
    padding-left: 3.8em;
    counter-reset: linenumber;
}

pre[class*="language-"].line-numbers > code {
    position: relative;
}

.line-numbers .line-numbers-rows {
    position: absolute;
    pointer-events: none;
    top: 0;
    font-size: 100%;
    left: -3.8em;
    width: 3em;
    letter-spacing: -1px;
    border-right: 1px solid #2a2c3c;
    user-select: none;
}

.line-numbers-rows > span {
    pointer-events: none;
    display: block;
    counter-increment: linenumber;
}

.line-numbers-rows > span:before {
    content: counter(linenumber);
    color: #6c7086;
    display: block;
    padding-right: 0.8em;
    text-align: right;
}

/* Responsive Design */
@media (max-width: 768px) {
    pre[class*="language-"] {
        padding: 20px 16px;
        margin: 16px 0;
        border-radius: 8px;
        font-size: 13px;
    }
    
    div.code-toolbar > .toolbar {
        position: relative;
        top: auto;
        right: auto;
        opacity: 1;
        transform: none;
        margin-top: 12px;
        display: flex;
        justify-content: flex-end;
    }
    
    div.code-toolbar::before {
        position: relative;
        top: auto;
        left: auto;
        display: inline-block;
        margin-bottom: 8px;
    }
}

/* Animation for code blocks */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

div.code-toolbar {
    animation: fadeInUp 0.5s ease;
}

/* Focus styles for accessibility */
div.code-toolbar > .toolbar > .toolbar-item > button:focus {
    outline: 2px solid #3d59a1;
    outline-offset: 2px;
}

 

/* Для разных языков */
pre[class*="language-"]::before {
    content: 'code';
    position: absolute;
    top: 12px;
    left: 16px;
    background: rgba(61, 89, 161, 0.9);
    color: white;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 1;
}

pre.language-markup::before { content: 'html'; }
pre.language-css::before { content: 'css'; }
pre.language-jаvascript::before { content: 'javascript'; }
pre.language-php::before { content: 'php'; }
pre.language-sql::before { content: 'sql'; }
pre.language-bash::before { content: 'bash'; }

Сохраняем, очищаем кеш. В браузере жмём Ctr+F5.

Дополнение:

Делаем компактный вид для длинного кода.

 /* Улучшенные скроллбары для длинного контента */
pre[class*="language-"] {
    scroll-behavior: smooth; /* Плавная прокрутка */
    scrollbar-width: thin; /* Тонкий скроллбар в Firefox */
    max-height: 500px; /* Ограничение высоты с прокруткой */
}

/* Стилизация скроллбара для Webkit браузеров (Chrome, Safari, Edge) */
pre[class*="language-"]::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

pre[class*="language-"]::-webkit-scrollbar-track {
    background: #1a1b26;
    border-radius: 0 0 12px 12px;
}

pre[class*="language-"]::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #3a3c52, #4a4c66);
    border-radius: 6px;
    border: 3px solid #1a1b26;
    transition: all 0.3s ease;
}

pre[class*="language-"]::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #4a4c66, #5a5c76);
    transform: scale(1.1);
}

pre[class*="language-"]::-webkit-scrollbar-corner {
    background: #1a1b26;
}

/* Показать скроллбар только при необходимости */
pre[class*="language-"] {
    overflow: auto;
}

/* Индикатор прокрутки */
pre[class*="language-"]::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: linear-gradient(transparent, #1a1b26);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

pre[class*="language-"]:hover::after {
    opacity: 1;
}

Готово.