:root {
    --bg-color: #F4F8FB;
    --text-color: #17242D;
    --heading-color: #17242D;
    --sidebar-bg: rgba(251, 253, 254, 0.85);
    --sidebar-border: rgba(216, 227, 234, 0.7);
    --border-color: #D8E3EA;
    --theme-color: #0288D1;
    --theme-color-hover: #015E91;
    --code-bg: rgba(2, 136, 209, 0.08);
    --code-text: #0288D1;
    --pre-bg: #F5F8FA;
    --search-bg: #ffffff;
    --search-border: rgba(85, 102, 115, 0.32);
    --search-result-hover: #E6F3FA;
    --card-shadow: 0 4px 6px -1px rgba(23, 36, 45, 0.05), 0 2px 4px -2px rgba(23, 36, 45, 0.05), 0 0 0 1px rgba(23, 36, 45, 0.02);
    --content-width: 840px;
    --sidebar-width: 280px;
    --scrollbar-thumb: #C0C0C0;
    --scrollbar-thumb-hover: #A0A0A0;

    --alert-note-bg: rgba(2, 136, 209, 0.04);
    --alert-note-border: #0288D1;
    --alert-tip-bg: rgba(46, 164, 79, 0.04);
    --alert-tip-border: #2ea44f;
    --alert-warning-bg: rgba(245, 158, 11, 0.04);
    --alert-warning-border: #f59e0b;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #ECEFF1;
    --heading-color: #ECEFF1;
    --sidebar-bg: rgba(22, 22, 22, 0.85);
    --sidebar-border: rgba(255, 255, 255, 0.1);
    --border-color: rgba(255, 255, 255, 0.18);
    --theme-color: #0288D1;
    --theme-color-hover: #2AA8EF;
    --code-bg: rgba(2, 136, 209, 0.12);
    --code-text: #2AA8EF;
    --pre-bg: #1A1A1A;
    --search-bg: #1E1E1E;
    --search-border: rgba(158, 158, 158, 0.32);
    --search-result-hover: #2D3942;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.05);
    --scrollbar-thumb: #505050;
    --scrollbar-thumb-hover: #707070;

    --alert-note-bg: rgba(2, 136, 209, 0.08);
    --alert-note-border: #0288D1;
    --alert-tip-bg: rgba(63, 185, 80, 0.08);
    --alert-tip-border: #3fb950;
    --alert-warning-bg: rgba(210, 153, 34, 0.08);
    --alert-warning-border: #d29922;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) transparent;
}

body {
    margin: 0;
    font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    font-size: 16px;
    line-height: 1.75;
    transition: background-color 0.3s, color 0.3s;
    -webkit-font-smoothing: antialiased;
}

:focus-visible {
    outline: 2px solid var(--theme-color);
    outline-offset: 2px;
}

::selection {
    background-color: rgba(2, 136, 209, 0.2);
}

[data-theme="dark"] ::selection {
    background-color: rgba(88, 166, 255, 0.3);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb);
    border-radius: 6px;
    border: 2px solid transparent;
    background-clip: content-box;
    transition: background-color 0.2s;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--scrollbar-thumb-hover);
}

.app-container {
    display: flex;
    min-height: 100vh;
}

.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 52px;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    padding: 0 12px;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.menu-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 22px;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    display: flex;
}

.mobile-logo {
    font-weight: 700;
    font-size: 16px;
    color: var(--heading-color);
    text-decoration: none;
    white-space: nowrap;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--sidebar-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: 1px solid var(--sidebar-border);
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    overflow-y: hidden;
    z-index: 90;
    padding: 24px 18px;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease, background-color 0.3s, border-color 0.3s;
}

.sidebar-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    padding: 0 4px;
}

.sidebar-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: opacity 0.2s;
}

.sidebar-brand:hover {
    opacity: 0.8;
}

.sidebar-brand img {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.search-container {
    position: relative;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 10px;
    color: var(--text-color);
    opacity: 0.5;
    pointer-events: none;
    transition: opacity 0.2s;
}

.search-input {
    width: 100%;
    padding: 8px 36px 8px 32px;
    border: 1px solid var(--search-border);
    background-color: var(--search-bg);
    color: var(--text-color);
    border-radius: 8px;
    font-size: 13.5px;
    outline: none;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.search-input:focus {
    border-color: var(--theme-color);
    box-shadow: 0 0 0 3px rgba(2, 136, 209, 0.12);
}

[data-theme="dark"] .search-input:focus {
    box-shadow: 0 0 0 3px rgba(42, 168, 239, 0.15);
}

.search-input:focus ~ .search-icon {
    opacity: 0.8;
    color: var(--theme-color);
}

.search-kbd {
    position: absolute;
    right: 10px;
    pointer-events: none;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-color);
    opacity: 0.5;
    background-color: var(--search-result-hover);
    border: 1px solid var(--border-color);
    padding: 1px 5px;
    border-radius: 4px;
    box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    max-height: 320px;
    overflow-y: auto;
    background-color: var(--search-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(12px);
    z-index: 110;
    margin-top: 6px;
    display: none;
}

.search-item {
    display: block;
    padding: 10px 14px;
    text-decoration: none;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.15s, padding-left 0.15s;
}

.search-item:last-child {
    border-bottom: none;
}

.search-item:hover,
.search-item:focus {
    background-color: var(--search-result-hover);
    padding-left: 18px;
    outline: none;
}

.search-title {
    font-weight: 600;
    font-size: 13px;
    color: var(--theme-color);
}

.search-snippet {
    font-size: 12px;
    color: var(--text-color);
    opacity: 0.75;
    margin-top: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.search-snippet mark {
    background-color: rgba(2, 136, 209, 0.15);
    color: var(--theme-color);
    padding: 1px 3px;
    border-radius: 3px;
    font-weight: 500;
}

[data-theme="dark"] .search-snippet mark {
    background-color: rgba(42, 168, 239, 0.2);
    color: var(--theme-color);
}

.no-result {
    padding: 16px;
    font-size: 13.5px;
    color: var(--text-color);
    opacity: 0.6;
    text-align: center;
}

.sidebar-nav {
    flex-grow: 1;
    overflow-y: auto;
    margin: 0 -4px;
    padding: 0 4px;
}

.sidebar-nav ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.sidebar-nav li {
    margin: 2px 0;
}

.sidebar-nav ul ul {
    padding-left: 14px;
    margin: 1px 0;
}

.sidebar-nav ul ul ul {
    padding-left: 12px;
}

.sidebar-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    display: block;
    padding: 6px 10px;
    border-radius: 6px;
    transition: color 0.2s, background-color 0.2s, padding-left 0.2s;
    line-height: 1.4;
}

.sidebar-nav a:hover {
    color: var(--theme-color);
    background-color: rgba(2, 136, 209, 0.06);
    padding-left: 14px;
}

[data-theme="dark"] .sidebar-nav a:hover {
    background-color: rgba(45, 57, 66, 0.6);
}

.sidebar-nav li.active > a {
    color: var(--theme-color);
    font-weight: 600;
    background-color: rgba(2, 136, 209, 0.08);
    border-left: 3px solid var(--theme-color);
    padding-left: 8px;
    border-top-left-radius: 2px;
    border-bottom-left-radius: 2px;
}

[data-theme="dark"] .sidebar-nav li.active > a {
    background-color: rgba(42, 168, 239, 0.12);
}

.sidebar-nav li p {
    margin: 0;
}

.sidebar-nav .collapse-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-color);
    padding: 5px 8px;
    border-radius: 4px;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    transition: color 0.15s, background-color 0.15s;
}

.sidebar-nav .collapse-toggle:hover {
    color: var(--theme-color);
    background-color: rgba(2, 136, 209, 0.06);
}

[data-theme="dark"] .sidebar-nav .collapse-toggle:hover {
    background-color: rgba(88, 166, 255, 0.08);
}

.sidebar-nav .collapse-toggle .arrow {
    transition: transform 0.2s;
    font-size: 11px;
}

.sidebar-nav .collapse-toggle .arrow.collapsed {
    transform: rotate(-90deg);
}

.sidebar-nav .collapsible-body {
    overflow: hidden;
    transition: max-height 0.25s ease;
}

.load-more-btn {
    display: block;
    width: 100%;
    padding: 5px 8px;
    margin-top: 4px;
    border: 1px dashed var(--border-color);
    border-radius: 5px;
    background: none;
    color: var(--text-color);
    font-size: 13px;
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, color 0.15s, background-color 0.15s;
    font-family: inherit;
    line-height: 1.4;
}

.load-more-btn:hover {
    border-color: var(--theme-color);
    color: var(--theme-color);
    background-color: rgba(2, 136, 209, 0.06);
}

[data-theme="dark"] .load-more-btn:hover {
    background-color: rgba(88, 166, 255, 0.08);
}

.top-navbar {
    height: 52px;
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    right: 0;
    left: var(--sidebar-width);
    background-color: var(--bg-color);
    z-index: 80;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    transition: left 0.25s ease, background-color 0.3s;
}

.top-navbar ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
}

.top-navbar li {
    margin: 0;
}

.top-navbar a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    padding: 4px 0;
    transition: color 0.15s;
    opacity: 0.8;
}

.top-navbar a:hover {
    color: var(--theme-color);
    opacity: 1;
}

.controls-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lang-select {
    display: none;
}

.lang-dropdown {
    position: relative;
    font-size: 13px;
    user-select: none;
}

.lang-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 8px 5px 10px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: inherit;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
    line-height: 1.4;
    font-family: inherit;
}

.lang-dropdown-trigger:hover {
    border-color: var(--theme-color);
    background-color: var(--search-result-hover);
}

.lang-dropdown.open .lang-dropdown-trigger {
    border-color: var(--theme-color);
    box-shadow: 0 0 0 2px rgba(2, 136, 209, 0.15);
}

[data-theme="dark"] .lang-dropdown.open .lang-dropdown-trigger {
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

.lang-dropdown-arrow {
    width: 10px;
    height: 6px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0.6;
    transition: transform 0.2s;
}

.lang-dropdown.open .lang-dropdown-arrow {
    transform: rotate(180deg);
}

.lang-dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 100%;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: var(--card-shadow);
    list-style: none;
    margin: 0;
    padding: 4px;
    z-index: 200;
    opacity: 0;
    transform: translateY(-4px);
    pointer-events: none;
    transition: opacity 0.15s, transform 0.15s;
}

.lang-dropdown.up .lang-dropdown-menu {
    top: auto;
    bottom: calc(100% + 4px);
    transform: translateY(4px);
}

.lang-dropdown.open .lang-dropdown-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.lang-dropdown-item {
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-color);
    font-size: 13px;
    transition: background-color 0.12s, color 0.12s;
    white-space: nowrap;
}

.lang-dropdown-item:hover {
    background-color: var(--search-result-hover);
    color: var(--theme-color);
}

.lang-dropdown-item.selected {
    color: var(--theme-color);
    font-weight: 600;
    background-color: rgba(2, 136, 209, 0.08);
}

[data-theme="dark"] .lang-dropdown-item.selected {
    background-color: rgba(88, 166, 255, 0.12);
}

.theme-toggle-btn {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, transform 0.15s, color 0.2s;
}

.theme-toggle-btn:hover {
    background-color: var(--border-color);
    color: var(--theme-color);
    transform: scale(1.1);
}

.theme-toggle-btn:active {
    transform: scale(0.92);
}

.theme-toggle-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
}

.main-content {
    margin-left: var(--sidebar-width);
    padding: 80px 40px 60px 40px;
    width: calc(100% - var(--sidebar-width));
    transition: margin-left 0.25s ease, width 0.25s ease;
    min-height: 100vh;
}

.content-body {
    max-width: var(--content-width);
    margin: 0 auto;
}

.content-body h1,
.content-body h2,
.content-body h3,
.content-body h4,
.content-body h5,
.content-body h6 {
    color: var(--heading-color);
    font-weight: 600;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    line-height: 1.3;
}

.content-body h1 {
    font-size: 2em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.25em;
    margin-top: 0;
}

.content-body h2 {
    font-size: 1.5em;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.2em;
}

.content-body h3 {
    font-size: 1.25em;
}

.content-body h4 {
    font-size: 1.1em;
}

.content-body p,
.content-body ul,
.content-body ol {
    margin-top: 0;
    margin-bottom: 1em;
}

.content-body a {
    color: var(--theme-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.content-body a:hover {
    border-bottom-color: var(--theme-color);
}

.content-body blockquote {
    margin: 1.5em 0;
    padding: 8px 20px;
    color: var(--text-color);
    opacity: 0.88;
    border-left: 3px solid var(--theme-color);
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
    background-color: var(--search-result-hover);
}

.content-body img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    margin: 1.5em 0;
}

.content-body ul,
.content-body ol {
    padding-left: 24px;
}

.content-body li {
    margin: 4px 0;
}

.content-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
    font-size: 14px;
}

.content-body th,
.content-body td {
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    text-align: left;
}

.content-body th {
    background-color: var(--sidebar-bg);
    font-weight: 600;
}

.content-body tr:hover {
    background-color: var(--search-result-hover);
}

code {
    font-family: "JetBrains Mono", "SF Mono", "Cascadia Code", "Fira Code", "Consolas", "Monaco", monospace;
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.85em;
    font-weight: 500;
}

pre {
    background-color: var(--pre-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 44px 18px 18px 18px; /* space at top for macOS dots */
    overflow-x: auto;
    margin: 1.8em 0;
    position: relative;
    font-size: 13.5px;
    line-height: 1.6;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}

[data-theme="dark"] pre {
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

pre::before {
    content: "";
    position: absolute;
    top: 18px;
    left: 18px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #ff5f56;
    box-shadow: 16px 0 0 #ffbd2e, 32px 0 0 #27c93f;
    opacity: 0.75;
}

pre code {
    background-color: transparent;
    color: var(--text-color);
    padding: 0;
    border-radius: 0;
    font-size: inherit;
    display: block;
}

.code-wrapper {
    position: relative;
}

.copy-code-btn {
    position: absolute;
    top: 10px;
    right: 12px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    opacity: 0;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transform: translateY(-2px);
    transition: opacity 0.25s, transform 0.25s, background-color 0.2s, border-color 0.2s;
    z-index: 10;
}

.code-wrapper:hover .copy-code-btn,
.copy-code-btn:focus-visible {
    opacity: 0.9;
    transform: translateY(0);
}

.copy-code-btn:hover {
    background-color: var(--search-result-hover);
    border-color: var(--theme-color);
    color: var(--theme-color);
}

.copy-code-btn.copied {
    border-color: #10b981;
    background-color: rgba(16, 185, 129, 0.08);
}

.alert-block {
    position: relative;
    padding: 16px 20px 16px 52px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin: 1.8em 0;
    font-size: 14px;
    line-height: 1.6;
}

.alert-block::before {
    content: "";
    position: absolute;
    left: 18px;
    top: 18px;
    width: 20px;
    height: 20px;
    background-size: contain;
    background-repeat: no-repeat;
}

.alert-block.note {
    background-color: var(--alert-note-bg);
    border-left: 4px solid var(--alert-note-border);
}
.alert-block.note::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%230288d1' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'%3E%3C/circle%3E%3Cline x1='12' y1='16' x2='12' y2='12'%3E%3C/line%3E%3Cline x1='12' y1='8' x2='12.01' y2='8'%3E%3C/line%3E%3C/svg%3E");
}

.alert-block.tip {
    background-color: var(--alert-tip-bg);
    border-left: 4px solid var(--alert-tip-border);
}
.alert-block.tip::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2310b981' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9.663 17h4.673M12 3v1m6.364.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.81 13.95A7.962 7.962 0 016 12a8 8 0 1116 0c0 1.907-.666 3.658-1.786 5.038A2 2 0 0118.66 18H5.34a2 2 0 01-1.649-.877z'%3E%3C/path%3E%3C/svg%3E");
}

.alert-block.warning {
    background-color: var(--alert-warning-bg);
    border-left: 4px solid var(--alert-warning-border);
}
.alert-block.warning::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23f59e0b' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M10.29 3.86L1.82 18a2 2 0 001.71 3h16.94a2 2 0 001.71-3L13.71 3.86a2 2 0 00-3.42 0z'%3E%3C/path%3E%3Cline x1='12' y1='9' x2='12' y2='13'%3E%3C/line%3E%3Cline x1='12' y1='17' x2='12.01' y2='17'%3E%3C/line%3E%3C/svg%3E");
}

[data-theme="dark"] .alert-block.note::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%232aa8ef' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'%3E%3C/circle%3E%3Cline x1='12' y1='16' x2='12' y2='12'%3E%3C/line%3E%3Cline x1='12' y1='8' x2='12.01' y2='8'%3E%3C/line%3E%3C/svg%3E");
}
[data-theme="dark"] .alert-block.tip::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2334d399' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9.663 17h4.673M12 3v1m6.364.636l-.707.707M21 12h-1M4 12H3m3.343-5.657l-.707-.707m2.81 13.95A7.962 7.962 0 016 12a8 8 0 1116 0c0 1.907-.666 3.658-1.786 5.038A2 2 0 0118.66 18H5.34a2 2 0 01-1.649-.877z'%3E%3C/path%3E%3C/svg%3E");
}
[data-theme="dark"] .alert-block.warning::before {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23fbbf24' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M10.29 3.86L1.82 18a2 2 0 001.71 3h16.94a2 2 0 001.71-3L13.71 3.86a2 2 0 00-3.42 0z'%3E%3C/path%3E%3Cline x1='12' y1='9' x2='12' y2='13'%3E%3C/line%3E%3Cline x1='12' y1='17' x2='12.01' y2='17'%3E%3C/line%3E%3C/svg%3E");
}

.codehilite .hll { background-color: var(--border-color) }
.codehilite .c { color: #8b949e; font-style: italic; }
.codehilite .k { color: #ff7b72; font-weight: 600; }
.codehilite .s { color: #a5d6ff; }
.codehilite .nb { color: #ffa657; }
.codehilite .nf { color: #d2a8ff; }

.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.2s, transform 0.2s, background-color 0.2s;
    z-index: 50;
    box-shadow: var(--card-shadow);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--border-color);
    color: var(--theme-color);
    border-color: var(--theme-color);
}

.back-to-top svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.changelog-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3em;
    padding-top: 1.5em;
    border-top: 1px solid var(--border-color);
    gap: 12px;
}

.content-body .changelog-nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    transition: border-color 0.2s, color 0.2s, background-color 0.2s;
}

.content-body .changelog-nav-link:hover {
    border-color: var(--theme-color);
    color: var(--theme-color);
    background-color: var(--search-result-hover);
}

.content-body .changelog-nav-link.prev {
    align-self: flex-start;
}

.content-body .changelog-nav-link.next {
    align-self: flex-end;
}

.sidebar-controls {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

@media (max-width: 960px) {
    :root {
        --sidebar-width: 280px;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
    }

    .top-navbar {
        left: 0;
        padding: 0 12px;
    }

    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 72px 16px 40px 16px;
    }

    .mobile-header {
        display: flex;
    }

    .top-navbar {
        display: none;
    }

    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 36px;
        height: 36px;
    }
}