Constant DEFAULT_CSS 

pub const DEFAULT_CSS: &str = r#"
:root {
    --color-primary: #d4760a;
    --color-primary-deep: #a85c08;
    --color-accent: #1e5a8a;
    --color-bg: #ffffff;
    --color-surface: #f6f5f2;
    --color-ink: #1a1a1e;
    --color-muted: #6b6b73;
    --color-border: #e2e1dd;
    --color-primary-bg: #fdf3ea;
    --color-header-bg: #ffffff;
    --color-success: #2d8a4e;
    --color-error: #c4382a;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Inter", Roboto, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    color-scheme: light;
}

[data-theme="dark"] {
    --color-bg: #131316;
    --color-surface: #1e1e23;
    --color-ink: #e8e7e3;
    --color-muted: #b0b0b8;
    --color-border: #2c2c32;
    --color-primary-bg: #2a1f14;
    --color-header-bg: #131316;
    color-scheme: dark;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-ink);
    background-color: var(--color-bg);
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

a:hover {
    color: var(--color-primary-deep);
}

.container {
    width: 100%;
    max-width: 42rem;
    margin: 0 auto;
    padding: 0 1.25rem;
}

@media (min-width: 48rem) {
    .container {
        max-width: 48rem;
        padding: 0 2rem;
    }
}

header {
    position: sticky;
    top: 0;
    z-index: 40;
    background-color: var(--color-header-bg);
    border-bottom: 1px solid var(--color-border);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 0;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.site-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-ink);
    white-space: nowrap;
}

.site-title:hover {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.125rem;
    flex-wrap: wrap;
}

.nav-links > a {
    padding: 0.375rem 0.625rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-muted);
    border-radius: 0.375rem;
}

.nav-links > a:hover {
    color: var(--color-ink);
    background-color: var(--color-surface);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-left: auto;
}

.lang-switcher {
    position: relative;
    cursor: pointer;
    user-select: none;
}

.lang-switcher > .lang-code {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.375rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-muted);
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    background-color: var(--color-bg);
    min-width: 2.125rem;
    height: 2rem;
}

.lang-switcher:hover > .lang-code,
.lang-switcher.open > .lang-code {
    color: var(--color-ink);
    border-color: var(--color-primary);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.25rem);
    right: 0;
    min-width: 7.5rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 0.25rem;
    display: none;
    z-index: 50;
}

.lang-switcher.open .lang-dropdown {
    display: block;
}

.lang-option {
    display: block;
    padding: 0.4375rem 0.625rem;
    font-size: 0.875rem;
    color: var(--color-ink);
    border-radius: 0.375rem;
}

.lang-option:hover {
    background-color: var(--color-surface);
}

.lang-option.active {
    color: var(--color-primary);
    font-weight: 600;
    background-color: var(--color-primary-bg);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    color: var(--color-muted);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    cursor: pointer;
}

.theme-toggle:hover {
    color: var(--color-ink);
    border-color: var(--color-primary);
}

.theme-toggle svg {
    width: 1rem;
    height: 1rem;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

main {
    padding: 2rem 0 3rem;
    min-height: calc(100vh - 12rem);
}

article h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

article.page h1,
section > h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 2rem;
    line-height: 1.3;
}

article.post header {
    position: static;
    background: none;
    border: none;
    backdrop-filter: none;
    padding: 0;
    margin-bottom: 2rem;
}

article.post header h1 {
    margin-bottom: 0.5rem;
}

article.post header time {
    display: block;
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-bottom: 0.75rem;
}

article .content,
section .content {
    font-size: 1rem;
    line-height: 1.75;
}

article .content > *:last-child,
section .content > *:last-child {
    margin-bottom: 0;
}

footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
    color: var(--color-muted);
    font-size: 0.875rem;
    text-align: center;
}

footer a {
    color: var(--color-muted);
}

footer a:hover {
    color: var(--color-primary);
}

.post-list ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.post-item {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

.post-item-header {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 0.25rem;
}

.post-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-ink);
}

.post-title:hover {
    color: var(--color-primary);
}

.post-item time {
    font-size: 0.8125rem;
    color: var(--color-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
}

.post-description {
    color: var(--color-muted);
    font-size: 0.9375rem;
    margin: 0;
    line-height: 1.6;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.tags a {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
    background-color: var(--color-surface);
    color: var(--color-muted);
    border-radius: 9999px;
    transition: color 0.15s ease, background-color 0.15s ease;
}

.tags a:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-bg);
}

.taxonomy-index h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
}

.tag-item {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background-color: var(--color-surface);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-ink);
}

.tag-item:hover {
    color: var(--color-primary);
}

.tag-name { font-weight: 500; }

.tag-count {
    font-size: 0.75rem;
    color: var(--color-muted);
    background-color: var(--color-bg);
    padding: 0.1rem 0.4rem;
    border-radius: 0.25rem;
}

.categories-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.categories-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9375rem;
}

.categories-list li:last-child { border-bottom: none; }

.categories-list .count {
    color: var(--color-muted);
    font-size: 0.875rem;
}

.archives h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.archive-year h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-top: 2rem;
    margin-bottom: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}

.archive-year:first-child h2 { margin-top: 0; }

.archive-year ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.archive-year li {
    display: flex;
    align-items: center;
    padding: 0.5rem 0;
    gap: 0.75rem;
    font-size: 0.9375rem;
}

.archive-date {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-muted);
    min-width: 3.5rem;
    flex-shrink: 0;
}

.archive-year li a {
    color: var(--color-ink);
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.archive-year li a:hover { color: var(--color-primary); }

.section-description {
    color: var(--color-muted);
    margin-bottom: 1.5rem;
    font-size: 0.9375rem;
}

.shorts-section .short-list {
    display: flex;
    flex-direction: column;
}

.short-item {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

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

.short-date {
    font-size: 0.8125rem;
    color: var(--color-muted);
    font-family: var(--font-mono);
    display: block;
    margin-bottom: 0.75rem;
}

.short-content {
    font-size: 0.9375rem;
    line-height: 1.7;
}

.short-content > *:last-child { margin-bottom: 0; }

.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-muted);
}

.pagination a {
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    font-weight: 500;
    color: var(--color-ink);
}

.pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.search-wrapper {
    position: relative;
    width: 12rem;
}

.search-input {
    width: 100%;
    padding: 0.4rem 2rem 0.4rem 0.75rem;
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    background-color: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-sans);
}

.search-input::placeholder { color: var(--color-muted); }

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary-bg);
}

.search-btn {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.25rem;
    color: var(--color-muted);
    cursor: pointer;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover { color: var(--color-ink); }

.search-btn svg {
    width: 1rem;
    height: 1rem;
    pointer-events: none;
}

.search-results {
    position: absolute;
    top: calc(100% + 0.25rem);
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    max-height: 24rem;
    overflow-y: auto;
    z-index: 50;
    display: none;
}

.search-results.visible { display: block; }

.search-result-item {
    display: block;
    padding: 0.75rem 0.875rem;
    font-size: 0.875rem;
    color: var(--color-ink);
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
}

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

.search-result-item:hover,
.search-result-item[data-active="true"] {
    background-color: var(--color-surface);
}

.search-result-item-title {
    font-weight: 500;
    color: var(--color-ink);
    line-height: 1.4;
}

.search-result-item-summary {
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--color-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.search-result-item-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: 0.5rem;
}

.search-result-tag {
    display: inline-flex;
    padding: 0.125rem 0.5rem;
    font-size: 0.6875rem;
    background-color: var(--color-surface);
    color: var(--color-muted);
    border-radius: 9999px;
}

.search-loading,
.search-empty,
.search-error {
    padding: 1rem;
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-muted);
}

.search-error { color: var(--color-error); }

.prose { max-width: none; }

.prose h1 { font-size: 1.875rem; font-weight: 700; margin-bottom: 1rem; line-height: 1.3; }
.prose h2 { font-size: 1.5rem; font-weight: 600; margin-top: 2rem; margin-bottom: 0.75rem; line-height: 1.35; }
.prose h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.5rem; line-height: 1.4; }
.prose p { margin-bottom: 1rem; line-height: 1.75; }

.prose code {
    background-color: var(--color-surface);
    padding: 0.125rem 0.375rem;
    font-family: var(--font-mono);
    font-size: 0.875em;
    border-radius: 0.25rem;
}

.prose pre {
    background-color: #1a1a1e;
    color: #e8e7e3;
    padding: 1rem 1.25rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    line-height: 1.6;
}

.prose pre code { background-color: transparent; padding: 0; font-size: inherit; }

.prose a {
    color: var(--color-primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.prose a:hover { text-decoration: none; }

.prose ul { list-style-type: disc; list-style-position: inside; margin-bottom: 1rem; padding-left: 0.5rem; }
.prose ol { list-style-type: decimal; list-style-position: inside; margin-bottom: 1rem; padding-left: 0.5rem; }
.prose li { margin-bottom: 0.25rem; }

.prose blockquote {
    border-left: 3px solid var(--color-primary);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--color-muted);
    font-style: italic;
}

.prose img { max-width: 100%; height: auto; border-radius: 0.5rem; margin: 1rem 0; }

.prose table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.prose th, .prose td {
    border: 1px solid var(--color-border);
    padding: 0.5rem 0.75rem;
    text-align: left;
}

.prose th { background-color: var(--color-surface); font-weight: 600; }
.prose hr { border: none; border-top: 1px solid var(--color-border); margin: 2rem 0; }

.tweet-timeline { max-width: 42rem; margin-left: auto; margin-right: auto; }
.tweet-list { border-top: 1px solid var(--color-border); }

.tweet-card {
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.tweet-card:hover { background-color: var(--color-surface); }
.tweet-single { cursor: default; padding: 1.5rem; }
.tweet-single:hover { background-color: transparent; }
.tweet-avatar { flex-shrink: 0; }

.avatar-initials {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    background-color: var(--color-primary);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
}

.tweet-main { flex: 1; min-width: 0; }
.tweet-header { display: flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; margin-bottom: 0.25rem; }
.tweet-author { font-weight: 600; color: var(--color-ink); }
.tweet-author:hover { text-decoration: underline; }
.tweet-time { font-size: 0.875rem; color: var(--color-muted); }
.tweet-content { color: var(--color-ink); line-height: 1.5; font-size: 0.9375rem; }
.tweet-content p { margin-bottom: 0.5rem; }
.tweet-content p:last-child { margin-bottom: 0; }
.date-separator { margin: 1.5rem 0; border-top: 1px solid var(--color-border); }

.archive-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    margin-right: 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    flex-shrink: 0;
    color: white;
}

.badge-post { background-color: var(--color-success); }
.badge-short { background-color: var(--color-accent); }

@media (max-width: 48rem) {
    .search-wrapper { width: 100%; }
    .nav-links { width: 100%; justify-content: center; }
    nav { padding-top: 0.75rem; padding-bottom: 0.75rem; }
    .nav-actions { width: 100%; justify-content: center; margin-left: 0; margin-top: 0.5rem; }
    .nav-links > a { padding: 0.35rem 0.5rem; font-size: 0.8125rem; }
    main { padding-top: 1.5rem; padding-bottom: 2rem; }
    .post-item-header { flex-direction: column; gap: 0.25rem; }
    .archive-year li { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
"#;