/* Pixel Art Style Theme */
@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

:root {
    --bg-primary: #202028;
    --bg-secondary: #2a2a32;
    --bg-tertiary: #353540;
    --text-primary: #f0f0f0;
    --text-secondary: #c0c0c8;
    --text-muted: #808090;
    --accent: #ffcc00;
    --accent-secondary: #ff9900;
    --accent-light: #ffe066;
    --border: #505060;
    --border-light: #404050;
    --shadow: rgba(0, 0, 0, 0.4);
    --pixel-border: 4px;
    --font-pixel: 'VT323', 'WenQuanYi Micro Hei Mono', 'Noto Sans CJK SC', 'Microsoft YaHei Mono', 'SimHei', monospace;
}

/* Light theme */
[data-theme="light"] {
    --bg-primary: #f0ece4;
    --bg-secondary: #f7f4ec;
    --bg-tertiary: #e8e2d6;
    --text-primary: #2a2a30;
    --text-secondary: #5a5a68;
    --text-muted: #9898a0;
    --accent: #c49030;
    --accent-secondary: #a07030;
    --accent-light: #d4a848;
    --border: #c8c4bc;
    --border-light: #d8d4cc;
    --shadow: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .archive-toggle {
    color: #3a2808;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

body {
    font-family: var(--font-pixel);
    line-height: 1.8;
    margin: 0;
    padding: 0;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Pixel pattern background */
    background-image: 
        linear-gradient(45deg, var(--bg-secondary) 25%, transparent 25%),
        linear-gradient(-45deg, var(--bg-secondary) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--bg-secondary) 75%),
        linear-gradient(-45deg, transparent 75%, var(--bg-secondary) 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
}

/* Ensure consistent font sizing for all text */
h1, h2, h3, h4, h5, h6,
p, span, div, a, li, pre, code {
    font-family: var(--font-pixel);
}

/* Chinese/Japanese/Korean font fallback */
body :lang(zh),
body :lang(ja),
body :lang(ko) {
    font-family: 'WenQuanYi Micro Hei Mono', 'Noto Sans CJK SC', 'Microsoft YaHei', 'SimHei', var(--font-pixel);
}

/* Pixel border style */
.pixel-border {
    border: var(--pixel-border) solid;
    border-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12'%3E%3Crect x='0' y='0' width='4' height='4' fill='%23ffcc00'/%3E%3Crect x='8' y='0' width='4' height='4' fill='%23ffcc00'/%3E%3Crect x='0' y='8' width='4' height='4' fill='%23ffcc00'/%3E%3Crect x='8' y='8' width='4' height='4' fill='%23ffcc00'/%3E%3Crect x='4' y='0' width='4' height='4' fill='%23ff9900'/%3E%3Crect x='0' y='4' width='4' height='4' fill='%23ff9900'/%3E%3Crect x='8' y='4' width='4' height='4' fill='%23ff9900'/%3E%3Crect x='4' y='8' width='4' height='4' fill='%23ff9900'/%3E%3Crect x='4' y='4' width='4' height='4' fill='%23ffe066'/%3E%3C/svg%3E") 4 stretch;
}

/* Header - pixel style */
header {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 16px;
    border-bottom: var(--pixel-border) solid var(--accent);
    box-shadow:
        0 4px 0 0 var(--accent-secondary),
        0 8px 0 0 var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    animation: pixelSlideDown 0.3s steps(8);
}

header nav {
    max-width: 1400px;
    margin: 0 auto;
}

@keyframes pixelSlideDown {
    0% {
        transform: translateY(-20px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

nav {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.nav-search {
    margin-left: auto;
}

.nav-search-input {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text-primary);
    box-shadow: inset 2px 2px 0 var(--shadow);
    outline: none;
    width: 180px;
}

.nav-search-input:focus {
    border-color: var(--accent);
    background: var(--bg-secondary);
    outline: none;
}

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

nav a {
    color: var(--bg-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: normal;
    padding: 8px 12px;
    background: var(--accent);
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow: 
        inset -3px -3px 0 0 var(--accent-secondary),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    position: relative;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

nav a::before {
    content: "▶ ";
    color: var(--bg-primary);
    flex-shrink: 0;
}

nav a:hover {
    background: var(--accent-secondary);
    box-shadow: 
        inset -3px -3px 0 0 var(--accent),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
}

nav a:active {
    box-shadow:
        inset -2px -2px 0 0 var(--accent-secondary),
        inset 2px 2px 0 0 var(--accent),
        2px 2px 0 0 var(--shadow);
}

/* RSS button */
.nav-rss {
    color: var(--bg-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: normal;
    padding: 8px 12px;
    background: var(--accent);
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow: 
        inset -3px -3px 0 0 var(--accent-secondary),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    position: relative;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nav-rss::before {
    content: "";
    flex-shrink: 0;
}

.nav-rss:hover {
    background: var(--accent-secondary);
    box-shadow: 
        inset -3px -3px 0 0 var(--accent),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
}

.nav-rss:active {
    box-shadow:
        inset -2px -2px 0 0 var(--accent-secondary),
        inset 2px 2px 0 0 var(--accent),
        2px 2px 0 0 var(--shadow);
}

/* Language selector */
.language-selector {
    position: relative;
    display: inline-block;
}

.language-selector-button {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--accent);
    color: var(--bg-primary);
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow: 
        inset -3px -3px 0 0 var(--accent-secondary),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
    cursor: pointer;
    transition: all 0.1s steps(2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.language-selector-button:hover {
    background: var(--accent-secondary);
    box-shadow: 
        inset -3px -3px 0 0 var(--accent),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
}

.language-selector-button:active {
    box-shadow:
        inset -2px -2px 0 0 var(--accent-secondary),
        inset 2px 2px 0 0 var(--accent),
        2px 2px 0 0 var(--shadow);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 2px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--accent);
    box-shadow: 4px 4px 0 0 var(--shadow);
    z-index: 1000;
    display: none;
}

.language-selector:hover .language-dropdown {
    display: block;
}

.language-selector:hover {
    position: relative;
    z-index: 1001;
}

.language-option {
    display: block;
    padding: 8px 16px;
    color: var(--text-primary);
    text-decoration: none;
    font-family: var(--font-pixel);
    font-size: 12px;
    transition: background-color 0.2s ease;
    background: none;
    border: none;
    box-shadow: none;
    text-align: left;
    min-width: 120px;
}

.language-option::before {
    content: none !important;
}

.language-option:hover {
    background: var(--bg-tertiary);
}

/* 当前语言项高亮 */
.language-option.lang-current {
    background: var(--accent);
    color: var(--bg-primary);
}

.language-option.lang-current:hover {
    background: var(--accent-light);
}

/* Theme toggle button */
.theme-toggle {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    cursor: pointer;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

/* Language switcher button */
.nav-lang {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    text-decoration: none;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    cursor: pointer;
}

/* Tags navigation button */
.nav-tags {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    text-decoration: none;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    cursor: pointer;
}

.nav-tags:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    text-decoration: none;
}

.nav-lang:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    text-decoration: none;
}

.theme-toggle:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.theme-toggle:active {
    box-shadow:
        inset -1px -1px 0 0 var(--shadow),
        inset 1px 1px 0 0 var(--bg-secondary);
    transform: translate(1px, 1px);
}

/* Mobile hamburger toggle (hidden on desktop, shown via media query) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    padding: 8px;
    margin-left: auto;
    background: var(--accent);
    color: var(--bg-primary);
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow:
        inset -3px -3px 0 0 var(--accent-secondary),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
    cursor: pointer;
    transition: background-color 0.1s steps(2);
}

.nav-toggle:hover {
    background: var(--accent-secondary);
}

.nav-toggle-bar {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--bg-primary);
    box-shadow: 0 0 0 1px var(--bg-primary);
}

/* Open state: animate bars into an X */
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

main {
    max-width: 1400px;
    margin: 32px auto;
    padding: 16px;
    overflow: hidden;
}

/* Page title - pixel style */
h1 {
    color: var(--accent);
    font-size: 22px;
    margin-bottom: 24px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--accent);
    box-shadow: 
        6px 6px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border),
        inset 2px 2px 0 0 var(--accent-light);
    word-wrap: break-word;
    display: block;
    line-height: 1.6;
    vertical-align: middle;
}

@keyframes pixelFadeIn {
    0% {
        opacity: 0;
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

h1::before {
    content: none;
}

/* Card layout - pixel style (Homepage only) */
.posts {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.post-card {
    background-color: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    padding: 16px;
    position: relative;
    transition: box-shadow 0.2s ease, background-color 0.2s ease;
    box-shadow:
        6px 6px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    display: flex;
    flex-direction: row;
    gap: 16px;
    min-height: 160px;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out;
    animation-fill-mode: both;
}

.post-card-thumbnail {
    flex-shrink: 0;
    width: 180px;
    height: 100%;
    min-height: 160px;
    overflow: hidden;
    border: 2px solid var(--border);
}

.post-card-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border: none;
    margin: 0;
    box-shadow: none;
    transition: transform 0.3s ease, opacity 0.2s ease;
    image-rendering: auto;
}

.post-card:hover .post-card-thumbnail img {
    transform: scale(1.05);
    opacity: 0.9;
}

.post-card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Staggered animation for cards */
.post-card:nth-child(1) { animation-delay: 0.1s; }
.post-card:nth-child(2) { animation-delay: 0.2s; }
.post-card:nth-child(3) { animation-delay: 0.3s; }
.post-card:nth-child(4) { animation-delay: 0.4s; }
.post-card:nth-child(5) { animation-delay: 0.5s; }
.post-card:nth-child(6) { animation-delay: 0.6s; }
.post-card:nth-child(7) { animation-delay: 0.7s; }
.post-card:nth-child(8) { animation-delay: 0.8s; }

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.post-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: repeating-linear-gradient(
        90deg,
        var(--accent) 0px,
        var(--accent) 8px,
        var(--accent-secondary) 8px,
        var(--accent-secondary) 16px
    );
    opacity: 0;
    transition: opacity 0.3s ease;
}

.post-card:hover::before {
    opacity: 1;
}

.post-card:hover {
    border-color: var(--accent);
    box-shadow:
        2px 2px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--accent),
        inset 2px 2px 0 0 var(--accent-light);
}

.post-card.pinned {
    border-color: var(--accent);
    background-color: var(--bg-tertiary);
}

.post-card.pinned::after {
    content: "📌 PINNED";
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 10px;
    font-weight: bold;
    color: var(--accent);
    background: var(--bg-primary);
    padding: 2px 6px;
    border: 2px solid var(--accent);
    box-shadow: 2px 2px 0 var(--shadow);
}

@keyframes borderPulse {
    0%, 100% {
        border-color: var(--accent);
    }
    25% {
        border-color: var(--accent-secondary);
    }
    50% {
        border-color: var(--accent-light);
    }
    75% {
        border-color: var(--accent);
    }
}

/* Article page - no hover move effect */
article.post:hover {
    transform: none;
    box-shadow:
        8px 8px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    border-color: var(--border);
}

.post-card-content h2 {
    margin-top: 0;
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--accent);
    font-weight: normal;
    flex-shrink: 0;
    line-height: 1.5;
    padding-bottom: 6px;
    border-bottom: 2px dashed var(--border);
}

.post-card-content h2 a {
    color: inherit;
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.5;
    word-break: break-word;
}

.post-card-content h2 a::before {
    content: "⮞ ";
    color: var(--accent-secondary);
    margin-right: 4px;
    display: inline-block;
    flex-shrink: 0;
    transition: transform 0.1s steps(2);
    line-height: 1.5;
    vertical-align: middle;
}

.post-card:hover .post-card-content h2 a::before {
    animation: pixelArrow 0.3s steps(3) infinite;
}

@keyframes pixelArrow {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(6px); }
}

.post-card-content h2 a:hover {
    color: var(--accent-light);
    text-shadow: 2px 2px 0 var(--shadow);
}

.post-card-content .post-card-meta {
    margin-bottom: 8px;
    flex-shrink: 0;
    min-width: 0;
    overflow: hidden;
}

.post-card-content .date-author-item {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    padding: 3px 6px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.post-card-content .date-author-item.author .meta-icon.icon-author {
    color: #ffaa44;
    margin-right: 4px;
}

.post-card-content .date-author-item.author .meta-label {
    color: var(--accent);
}

.post-card-content .meta-value {
    color: var(--text-primary);
}

.post-card-content .summary {
    color: var(--text-secondary);
    margin-top: auto;
    padding: 6px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    box-shadow: inset 2px 2px 0 var(--shadow);
    font-size: 13px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 72px !important;
    min-height: auto !important;
    max-height: 72px !important;
    word-break: break-word;
    transition: all 0.1s steps(2);
}

/* Reset margins for child elements to prevent overflow */
.post-card-content .summary p,
.post-card-content .summary br,
.post-card-content .summary span {
    margin: 0 !important;
    padding: 0 !important;
    display: inline;
}

.post-card:hover .post-card-content .summary {
    background: var(--bg-primary);
    border-color: var(--accent);
    color: var(--text-primary);
}

.post-card-content .summary::before {
    content: "💬 ";
}

.post-card-content .summary-empty::before {
    content: none;
}

/* List page summary styles */
.post .summary {
    color: var(--text-secondary);
    margin-top: auto;
    padding: 6px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    box-shadow: inset 2px 2px 0 var(--shadow);
    font-size: 13px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 72px !important;
    min-height: auto !important;
    max-height: 72px !important;
    word-break: break-word;
    transition: all 0.1s steps(2);
}

.post .summary p,
.post .summary br,
.post .summary span {
    margin: 0 !important;
    padding: 0 !important;
    display: inline;
}

.post .summary::before {
    content: "💬 ";
}

.post .summary-empty::before {
    content: none;
}

/* Single post/article page */
/* Single post/article page - separate from homepage cards */
article.post {
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    padding: 20px;
    margin-bottom: 24px;
    box-shadow:
        8px 8px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    animation: none;
    /* Override .post card styles */
    height: auto !important;
    overflow: visible !important;
    display: block !important;
    flex-direction: unset !important;
}

/* No hover effect on single article page */
article.post:hover {
    transform: none;
    animation: none;
    border-color: var(--border);
    box-shadow:
        8px 8px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
}

article.post .post-title {
    color: var(--accent);
    font-size: 28px;
    font-weight: bold;
    margin: 0 0 16px 0;
    line-height: 1.4;
    padding: 0;
    display: block;
}

.origin-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: bold;
    padding: 2px 8px;
    margin-right: 10px;
    vertical-align: middle;
    border: 2px solid;
    box-shadow: 2px 2px 0 var(--shadow);
    background: var(--bg-primary) !important;
    color: var(--accent) !important;
    border-color: var(--accent) !important;
}

.origin-tag.origin-original {
    color: #22c55e !important;
    border-color: #22c55e !important;
    background: var(--bg-primary) !important;
}

.origin-tag.origin-repost {
    color: var(--accent) !important;
    border-color: var(--accent) !important;
    background: var(--bg-primary) !important;
}

article.post p {
    margin-bottom: 16px;
    line-height: 2;
}

article.post .post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin: 8px 0;
}

article.post .post-meta .date,
article.post .post-meta .author,
article.post .post-meta .tags {
    font-size: 14px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0;
    border: none;
    box-shadow: none;
    background: transparent;
    display: inline-flex;
    align-items: center;
    line-height: 1;
}

article.post .post-meta .date::before,
article.post .post-meta .author::before,
article.post .post-meta .tags::before {
    font-size: 14px;
    line-height: 1;
    margin-right: 4px;
    display: inline-block;
    vertical-align: middle;
    transform: translateY(-1px);
}

article.post .post-meta .date::before {
    content: "📅 [DATE] ";
    color: var(--accent);
}

article.post .post-meta .author::before {
    content: "✎ [AUTHOR] ";
    color: #ffaa44;
}

article.post .post-meta .tags::before {
    content: "🏷️ [TAGS] ";
    color: #ff88dd;
}

article.post .content {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 2px dashed var(--border);
}

/* Video embed */
.video-container {
    position: relative;
    width: 100%;
    padding-bottom: var(--aspect-ratio, 56.25%);
    margin: 24px 0;
    border: var(--pixel-border) solid var(--border);
    box-shadow:
        6px 6px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    overflow: hidden;
    background: var(--bg-secondary);
    animation: pixelFadeIn 0.4s steps(6);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Content styling - pixel style */
.content h2 {
    color: var(--accent);
    font-size: 24px;
    font-weight: bold;
    margin-top: 28px;
    margin-bottom: 14px;
    word-wrap: break-word;
}

.content h3 {
    color: var(--accent);
    font-size: 22px;
    font-weight: bold;
    margin-top: 24px;
    margin-bottom: 12px;
    word-wrap: break-word;
}

.content h4 {
    color: var(--accent);
    font-size: 20px;
    font-weight: bold;
    margin-top: 20px;
    margin-bottom: 10px;
    word-wrap: break-word;
}

.content h5 {
    color: var(--accent);
    font-size: 18px;
    font-weight: bold;
    margin-top: 18px;
    margin-bottom: 8px;
    word-wrap: break-word;
}

.content h6 {
    color: var(--accent);
    font-size: 16px;
    font-weight: bold;
    margin-top: 16px;
    margin-bottom: 8px;
    word-wrap: break-word;
}

.content h2::before {
    content: "▶▶ ";
    color: var(--accent-secondary);
}

.content h3::before {
    content: "▶▶▶ ";
    color: var(--accent-secondary);
}

.content p {
    margin-bottom: 16px;
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 16px;
}

.content code {
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    padding: 2px 6px;
    font-family: var(--font-pixel);
    color: var(--accent-secondary);
    font-size: 18px;
    word-break: break-word;
    box-shadow: inset 1px 1px 0 var(--shadow);
}

.content pre {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 18px;
    border: var(--pixel-border) solid var(--border);
    padding: 40px 12px 12px 12px;
    margin: 16px 0;
    position: relative;
    box-sizing: border-box;
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary);
    counter-reset: line;
    white-space: pre;
    overflow: visible;
}

.content pre code {
    display: block;
    counter-reset: line;
    white-space: pre;
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
    -webkit-overflow-scrolling: touch;
}

.content pre::before {
    content: attr(data-lang);
    position: absolute;
    top: 6px;
    left: 12px;
    color: var(--text-muted);
    font-size: 13px;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
    z-index: 10;
    opacity: 0.7;
    pointer-events: none;
}

/* Fallback for code blocks without data-lang */
.content pre:not([data-lang])::before {
    content: "CODE";
}

/* Copy button */
.content pre .copy-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    padding: 4px 10px;
    font-family: var(--font-pixel);
    font-size: 13px;
    background: var(--accent);
    color: var(--bg-primary);
    border: 2px solid var(--bg-primary);
    cursor: pointer;
    z-index: 20;
    box-shadow: 2px 2px 0 var(--shadow);
    transition: all 0.1s steps(2);
}

.content pre .copy-btn:hover {
    background: var(--accent-secondary);
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--shadow);
}

.content pre .copy-btn:active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.content pre .copy-btn.copied {
    background: #22c55e;
}

/* Line numbers */
.content pre code .line {
    display: flex;
    align-items: center;
    min-height: 1.5em;
    white-space: pre;
}

.content pre code .line::before {
    counter-increment: line;
    content: counter(line);
    flex-shrink: 0;
    width: 36px;
    padding-right: 12px;
    text-align: right;
    color: var(--text-muted);
    font-size: 14px;
    opacity: 0.6;
    user-select: none;
}

/* Chroma syntax highlighting */
.chroma {
    font-family: var(--font-pixel);
    font-size: inherit;
}

.chroma .line,
.chroma .ln {
    color: var(--text-muted);
    font-size: inherit;
}

/* Keywords: if, else, return, func, var, etc. */
.chroma .k, .chroma .kc, .chroma .kd, .chroma .kn, .chroma .kp, .chroma .kr, .chroma .kt {
    color: var(--accent);
    font-weight: normal;
}

/* Strings */
.chroma .s, .chroma .sa, .chroma .sb, .chroma .sc, .chroma .dl, .chroma .sd, .chroma .s2,
.chroma .se, .chroma .sh, .chroma .si, .chroma .sx, .chroma .sr, .chroma .s1, .chroma .ss {
    color: #22c55e;
}

/* Comments */
.chroma .c, .chroma .ch, .chroma .cm, .chroma .cp, .chroma .cpf, .chroma .c1, .chroma .cs {
    color: var(--text-muted);
    font-style: normal;
}

/* Numbers */
.chroma .m, .chroma .mb, .chroma .mf, .chroma .mh, .chroma .mi, .chroma .il, .chroma .mo, .chroma .mx {
    color: var(--accent-secondary);
}

/* Operators, punctuation */
.chroma .p, .chroma .o, .chroma .ow {
    color: var(--text-primary);
}

/* Types, structs */
.chroma .n, .chroma .na, .chroma .nb, .chroma .bp, .chroma .nc, .chroma .no,
.chroma .nd, .chroma .ni, .chroma .ne, .chroma .fm, .chroma .nl, .chroma .nx,
.chroma .py, .chroma .nt, .chroma .nv, .chroma .vc, .chroma .vg, .chroma .vi, .chroma .vm {
    color: var(--text-primary);
}

/* Built-in functions and constants */
.chroma .nb, .chroma .kc {
    color: #56b6c2;
}

/* Function names */
.chroma .nf, .chroma .fm {
    color: var(--accent-light);
}

/* Escape sequences, regex */
.chroma .se, .chroma .sr {
    color: #e5c07b;
}

.content blockquote {
    border-left: 4px solid var(--accent);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 12px;
    border: 2px solid var(--border);
    border-left: 4px solid var(--accent);
    box-shadow: inset 2px 2px 0 var(--shadow);
}

.content blockquote::before {
    content: "❝ ";
    color: var(--accent);
    font-size: 16px;
}

.content ul,
.content ol {
    margin: 16px 0;
    padding-left: 32px;
}

.content ul li {
    list-style: none;
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 2;
    position: relative;
}

.content ol li {
    margin-bottom: 8px;
    color: var(--text-primary);
    line-height: 2;
}

.content ul li::before {
    content: "▪ ";
    color: var(--accent);
    margin-left: -16px;
}

.content a {
    color: var(--accent-secondary);
    text-decoration: none;
    border-bottom: 2px solid var(--accent);
    word-break: break-word;
    cursor: pointer;
}

.content a:hover {
    color: var(--accent-secondary);
    background: transparent;
    border-bottom-color: var(--accent);
    text-shadow: none;
}

.content img {
    max-width: 100%;
    height: auto;
    border: var(--pixel-border) solid var(--border);
    margin: 16px auto;
    display: block;
    box-shadow: 4px 4px 0 var(--shadow);
    image-rendering: pixelated;
    cursor: default;
}

.content .img-wrapper {
    margin: 20px auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 100%;
}

.content .img-wrapper img {
    margin: 0 auto;
}

.content .img-caption {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 12px;
    background: transparent;
    border: none;
    display: block;
    text-align: center;
    margin: 0 auto;
}

.content .img-caption::before {
    content: none;
}

.content figure {
    margin: 20px auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 100%;
}

.content figure img {
    max-width: 100%;
    width: auto;
    height: auto;
    border: var(--pixel-border) solid var(--border);
    margin: 0 auto;
    display: block;
    box-shadow: 4px 4px 0 var(--shadow);
    image-rendering: pixelated;
    cursor: default;
}

.content figcaption {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    border-top: none;
    display: block;
    text-align: center;
    margin: 0 auto;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.content figcaption::before {
    content: "📷 ";
    color: var(--accent);
}

.content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    background: var(--bg-tertiary);
    border: var(--pixel-border) solid var(--border);
    box-shadow: 4px 4px 0 var(--shadow);
}

.content th,
.content td {
    padding: 8px;
    border: 2px solid var(--border);
    text-align: left;
}

.content th {
    background: var(--bg-secondary);
    color: var(--accent);
    font-weight: normal;
    border-bottom: 4px solid var(--accent);
}

/* Related Posts */
.related-posts {
    margin-top: 40px;
    margin-bottom: 24px;
}

/* Language Switcher */
.post-lang-switcher {
    margin-top: 32px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.lang-switcher-label {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: normal;
    margin-right: 4px;
}

.lang-switcher-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    height: 32px;
    padding: 6px 16px;
    font-family: var(--font-pixel);
    font-size: 14px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    text-decoration: none;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    cursor: pointer;
}

.lang-switcher-btn:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    transform: translate(1px, 1px);
}

.lang-switcher-btn:active {
    box-shadow:
        inset -1px -1px 0 0 var(--shadow),
        inset 1px 1px 0 0 var(--bg-secondary);
    transform: translate(2px, 2px);
}

.related-title {
    color: var(--accent);
    font-size: 20px;
    font-weight: bold;
    margin: 0 0 20px 0;
    padding: 0 0 8px 0;
    border-bottom: 3px solid var(--accent);
    display: inline-block;
}

.related-posts-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.related-post-card {
    display: flex;
    flex-direction: row;
    align-items: stretch;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    padding: 12px;
    gap: 12px;
    text-decoration: none;
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    transition: all 0.2s ease;
    color: inherit;
    min-height: 80px;
}

.related-post-card:hover {
    border-color: var(--accent);
    box-shadow:
        2px 2px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--accent),
        inset 2px 2px 0 0 var(--accent-light);
    transform: translate(2px, 2px);
}

.related-post-card img {
    width: 100px;
    height: auto;
    min-height: 80px;
    object-fit: cover;
    border: 2px solid var(--border-light);
    flex-shrink: 0;
    box-shadow: none;
    image-rendering: auto;
}

.related-post-card:hover img {
    transform: none;
    opacity: 1;
}

.related-post-info h4 {
    color: var(--text-primary);
    font-size: 14px;
    margin: 0 0 6px 0;
    font-weight: normal;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.related-post-card:hover .related-post-info h4 {
    color: var(--accent);
}

.related-date {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Responsive related posts */
@media (max-width: 900px) {
    .related-posts-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .related-posts-list {
        grid-template-columns: 1fr;
    }
}

/* Footer - pixel style */
footer {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
    text-align: center;
    padding: 20px;
    margin-top: 32px;
    border-top: var(--pixel-border) solid var(--accent);
    font-size: 13px;
    box-shadow: 
        0 -4px 0 0 var(--accent-secondary),
        0 -8px 0 0 var(--shadow);
    animation: pixelSlideUp 0.3s steps(8);
}

@keyframes pixelSlideUp {
    0% {
        transform: translateY(20px);
        opacity: 0;
    }
    100% {
        transform: translateY(0);
        opacity: 1;
    }
}

footer::before {
    content: "═══════════════════════════════════════";
    display: block;
    margin-bottom: 12px;
    color: var(--border);
    letter-spacing: 2px;
    line-height: 1;
}

footer p::before {
    content: none;
}

/* Blinking cursor effect */
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

footer::after {
    content: "█";
    display: inline-block;
    margin-left: 8px;
    animation: blink 0.8s steps(1) infinite;
    color: var(--accent);
}

/* Scrollbar styling - pixel style */
::-webkit-scrollbar {
    width: 16px;
    height: 16px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border: 2px solid var(--border);
}

::-webkit-scrollbar-thumb {
    background: var(--accent);
    border: 2px solid var(--border);
    box-shadow: inset -2px -2px 0 var(--accent-secondary);
}

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

/* About page (站点介绍) — inside article.post content box */
.about-page {
    max-width: 100%;
    margin: 0 auto;
}

.about-section {
    margin-bottom: 28px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border: 2px solid var(--border);
    box-shadow: 4px 4px 0 0 var(--shadow);
}

.about-section-title {
    font-family: var(--font-pixel);
    font-size: 16px;
    color: var(--accent-secondary);
    margin: 0 0 12px 0;
    border-bottom: 2px dashed var(--border);
    padding-bottom: 8px;
}

.about-text {
    color: var(--text-primary);
    line-height: 1.7;
    margin: 0 0 12px 0;
}

.about-text:last-child {
    margin-bottom: 0;
}

.about-author-name {
    font-size: 18px;
    color: var(--accent);
    margin-bottom: 8px;
}

.about-author-links {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.about-link {
    display: inline-block;
    padding: 6px 12px;
    font-family: var(--font-pixel);
    font-size: 13px;
    color: var(--bg-primary);
    background: var(--accent);
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow: 2px 2px 0 0 var(--shadow);
    text-decoration: none;
    transition: all 0.1s steps(2);
}

.about-link:hover {
    background: var(--accent-secondary);
    transform: translate(1px, 1px);
}

.about-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.about-stat {
    flex: 1 1 120px;
    text-align: center;
    padding: 16px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    box-shadow: inset 2px 2px 0 var(--shadow);
}

.about-stat-value {
    display: block;
    font-family: var(--font-pixel);
    font-size: 32px;
    color: var(--accent);
    line-height: 1;
}

.about-stat-label {
    display: block;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

.about-badge {
    display: inline-block;
    padding: 4px 10px;
    margin: 0 8px 8px 0;
    font-family: var(--font-pixel);
    font-size: 12px;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    box-shadow: 2px 2px 0 0 var(--shadow);
}

.about-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 12px;
}

.about-meta a {
    color: var(--accent);
}

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

.about-recent li {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border);
}

.about-recent li:last-child {
    border-bottom: none;
}

.about-recent-date {
    flex-shrink: 0;
    font-family: var(--font-pixel);
    font-size: 13px;
    color: var(--text-muted);
    width: 88px;
}

.about-recent-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.1s steps(2);
}

.about-recent-link:hover {
    color: var(--accent);
    text-shadow: 1px 1px 0 var(--shadow);
    padding-left: 4px;
}

/* Old site index list */
.oldsite-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.oldsite-item {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border);
}

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

.oldsite-no {
    flex-shrink: 0;
    font-family: var(--font-pixel);
    font-size: 14px;
    color: var(--accent);
    width: 34px;
    text-align: right;
}

.oldsite-link {
    color: var(--text-primary);
    text-decoration: none;
    word-break: break-all;
    transition: all 0.1s steps(2);
}

.oldsite-link:hover {
    color: var(--accent);
    text-shadow: 1px 1px 0 var(--shadow);
    padding-left: 4px;
}

.oldsite-date {
    flex-shrink: 0;
    margin-left: auto;
    font-family: var(--font-pixel);
    font-size: 13px;
    color: var(--text-muted);
    white-space: nowrap;
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    header {
        padding: 12px;
    }
    
    header nav {
        max-width: 100%;
    }
    
    main {
        padding: 8px;
        margin: 16px auto;
    }
    
    nav {
        flex-wrap: wrap;
        gap: 8px;
        align-items: center;
    }

    /* Hamburger + collapsible menu (mobile only) */
    .nav-toggle {
        display: flex;
        order: 2;
        margin-left: auto;
    }

    .nav-home {
        order: 1;
        margin-right: auto;
    }

    /* Collapsible nav items: sit below the bar, hidden until toggled open */
    nav > .nav-archive,
    nav > .nav-tags,
    nav > .nav-about,
    nav > .nav-categories,
    nav > .nav-oldsite,
    nav > .nav-search,
    nav > .theme-toggle,
    nav > .language-selector {
        order: 3;
        flex-basis: 100%;
        width: 100%;
        display: none;
    }

    nav > .nav-archive,
    nav > .nav-tags,
    nav > .nav-about,
    nav > .nav-categories,
    nav > .nav-oldsite,
    nav > .theme-toggle,
    nav > .language-selector-button {
        justify-content: center;
    }

    nav.nav-open > .nav-archive,
    nav.nav-open > .nav-tags,
    nav.nav-open > .nav-about,
    nav.nav-open > .nav-categories,
    nav.nav-open > .nav-oldsite,
    nav.nav-open > .nav-search,
    nav.nav-open > .theme-toggle,
    nav.nav-open > .language-selector {
        display: flex;
        animation: pixelSlideDown 0.2s steps(4);
    }

    nav.nav-open {
        padding-bottom: 8px;
        border-bottom: var(--pixel-border) solid var(--border);
    }

    .nav-search-input {
        width: 100%;
    }

    .language-selector {
        text-align: center;
    }

    .language-selector-button {
        width: 100%;
    }

    .language-dropdown {
        position: static;
        width: 100%;
        box-shadow: none;
        border: none;
        padding: 0;
    }

    .language-option {
        text-align: center;
    }

    .posts {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .post {
        height: 320px;
    }

    .post-card {
        flex-direction: column;
    }

    .post-card-thumbnail {
        width: 100%;
        height: 160px;
        margin-bottom: 8px;
    }

    h1 {
        font-size: 18px;
    }

    .content pre {
        padding: 36px 8px 8px 8px;
        font-size: 14px;
    }

    .content pre code {
        font-size: 14px;
    }

    .content pre code .line::before {
        width: 28px;
        font-size: 11px;
        padding-right: 8px;
    }

    .video-container {
        margin: 16px 0;
    }
}

/* Selection color */
::selection {
    background: var(--accent);
    color: var(--bg-primary);
}

/* Links in nav */
a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    color: var(--accent-light);
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility (exclude links) */
input:focus,
textarea:focus,
select:focus {
    outline: 4px solid var(--accent);
    outline-offset: 2px;
}

/* Remove default focus outline on buttons */
button:focus,
button:active {
    outline: none;
}

/* Pixel loading animation */
@keyframes pixelPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Pixel divider */
.pixel-divider {
    height: 4px;
    background: repeating-linear-gradient(
        90deg,
        var(--accent) 0px,
        var(--accent) 8px,
        transparent 8px,
        transparent 16px
    );
    margin: 24px 0;
}

/* Back to top button - pixel style */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 80px;
    height: 40px;
    background: var(--accent);
    color: var(--bg-primary);
    font-family: var(--font-pixel);
    font-size: 12px;
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--accent-secondary),
        inset 2px 2px 0 0 var(--accent-light);
    cursor: pointer;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.15s steps(3);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    background: var(--accent-secondary);
    box-shadow: 
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--accent),
        inset 2px 2px 0 0 var(--accent-light);
}

.back-to-top:active {
    box-shadow: 
        2px 2px 0 0 var(--shadow),
        inset -1px -1px 0 0 var(--accent-secondary),
        inset 1px 1px 0 0 var(--accent);
    transform: translate(2px, 2px);
}

/* Responsive back-to-top button */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 76px;
        height: 38px;
        font-size: 11px;
        z-index: 9999;
    }
}

/* Tags cloud */
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding: 20px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    box-shadow:
        6px 6px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    animation: pixelAppear 0.3s steps(6);
}

.tag-item {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    color: var(--text-primary);
    font-size: 13px;
    text-decoration: none;
    box-shadow: inset 1px 1px 0 var(--shadow);
    transition: all 0.1s steps(2);
    cursor: pointer;
}

.tag-item:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    transform: translate(2px, 2px);
}

.tag-count {
    margin-left: 4px;
    color: var(--accent-secondary);
    font-size: 11px;
}

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

/* Tag links in posts */
.tag-link {
    display: inline-block;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    color: var(--accent-secondary);
    font-size: 14px;
    text-decoration: none;
    box-shadow: inset 1px 1px 0 var(--shadow);
    transition: all 0.1s steps(2);
    cursor: pointer;
    user-select: none;
}

.tag-link:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    transform: translate(2px, 2px);
    box-shadow: inset -1px -1px 0 var(--shadow);
}

.tag-link:active {
    transform: translate(3px, 3px);
    box-shadow: none;
}

.tag-link.expanded {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    box-shadow: inset -1px -1px 0 var(--shadow);
}

/* Search page */
.search-container {
    padding: 20px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    box-shadow:
        6px 6px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    animation: pixelAppear 0.3s steps(6);
}

.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.search-input {
    flex: 1;
    padding: 12px 16px;
    font-family: var(--font-pixel);
    font-size: 14px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border);
    color: var(--text-primary);
    box-shadow: inset 2px 2px 0 var(--shadow);
    outline: none;
}

.search-input:focus {
    border-color: var(--accent);
}

.search-btn {
    padding: 12px 24px;
    font-family: var(--font-pixel);
    font-size: 14px;
    background: var(--accent);
    color: var(--bg-primary);
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--accent-secondary),
        inset 2px 2px 0 0 var(--accent-light);
    cursor: pointer;
    transition: all 0.1s steps(2);
}

.search-btn:hover {
    background: var(--accent-secondary);
}

.search-btn:active {
    box-shadow:
        2px 2px 0 0 var(--shadow),
        inset -1px -1px 0 0 var(--accent-secondary),
        inset 1px 1px 0 0 var(--accent);
    transform: translate(2px, 2px);
}

.search-results {
    margin-top: 16px;
}

.search-hint,
.search-no-results {
    text-align: center;
    padding: 32px;
    color: var(--text-muted);
    font-size: 13px;
    border: 2px dashed var(--border);
}

.search-results-count {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 2px solid var(--accent);
    color: var(--accent);
    font-size: 13px;
    margin-bottom: 16px;
    box-shadow: inset 1px 1px 0 var(--shadow);
}

.search-result-item {
    padding: 16px;
    margin-bottom: 16px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    box-shadow: inset 1px 1px 0 var(--shadow);
    transition: all 0.1s steps(2);
}

.search-result-item:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.search-result-item h3 {
    margin: 0 0 8px 0;
    font-size: 14px;
}

.search-result-item h3 a {
    color: var(--accent);
    text-decoration: none;
}

.search-result-item h3 a::before {
    content: "→ ";
    color: var(--accent-secondary);
}

.search-result-item h3 a:hover {
    color: var(--accent-light);
}

.search-result-date {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.search-result-summary {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Responsive search */
@media (max-width: 768px) {
    .search-box {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
    }
}

/* Pagination - pixel style */
.pagination {
    margin-top: 32px;
    margin-bottom: 24px;
    display: flex;
    justify-content: center;
}

.pagination-container {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    padding: 12px 0;
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 28px;
    padding: 4px 10px;
    font-family: var(--font-pixel);
    font-size: 13px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    text-decoration: none;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    cursor: pointer;
}

.pagination-btn:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    transform: translate(1px, 1px);
}

.pagination-btn:active {
    box-shadow:
        inset -1px -1px 0 0 var(--shadow),
        inset 1px 1px 0 0 var(--bg-secondary);
    transform: translate(2px, 2px);
}

.pagination-current {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 28px;
    padding: 4px 10px;
    font-family: var(--font-pixel);
    font-size: 13px;
    background: var(--accent);
    color: var(--bg-primary);
    border: 2px solid var(--accent);
    box-shadow:
        inset -2px -2px 0 0 var(--accent-secondary),
        inset 2px 2px 0 0 var(--accent-light),
        2px 2px 0 0 var(--shadow);
    cursor: default;
}

.pagination-disabled {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 28px;
    padding: 4px 10px;
    font-family: var(--font-pixel);
    font-size: 13px;
    background: var(--bg-secondary);
    color: var(--text-muted);
    border: 2px solid var(--border-light);
    box-shadow: inset -1px -1px 0 0 var(--shadow);
    cursor: default;
    opacity: 0.5;
}

.pagination-dots {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 28px;
    padding: 4px 6px;
    font-family: var(--font-pixel);
    font-size: 13px;
    color: var(--text-muted);
    cursor: default;
}

/* Archive page - pixel style */
.archive-container {
    display: flex;
    gap: 24px;
    animation: pixelFadeIn 0.4s steps(6);
}

.archive-sidebar {
    width: 260px;
    flex-shrink: 0;
}

.archive-tree {
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    padding: 16px;
    box-shadow:
        6px 6px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 112px);
    overflow-y: auto;
}

.archive-year-group {
    margin-bottom: 4px;
}

.archive-year-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    cursor: pointer;
    font-size: 15px;
    color: var(--accent);
    font-weight: bold;
    transition: all 0.1s steps(2);
    user-select: none;
    border: 2px solid transparent;
}

.archive-year-header:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-light);
}

.archive-year-header:active {
    transform: translate(1px, 1px);
}

.archive-toggle {
    display: inline-block;
    width: 14px;
    font-size: 11px;
    color: var(--accent);
    transition: transform 0.15s steps(2);
    flex-shrink: 0;
}

.archive-toggle.open {
    transform: rotate(90deg);
}

.archive-year-label {
    flex: 1;
}

.archive-count {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: normal;
}

.archive-months {
    margin-left: 20px;
    border-left: 3px dashed var(--border-light);
    padding-left: 12px;
    display: none;
}

.archive-month-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.1s steps(2);
    user-select: none;
    border: 2px solid transparent;
    margin: 2px 0;
}

.archive-month-item:hover {
    background: var(--bg-tertiary);
    color: var(--accent-secondary);
    border-color: var(--border-light);
}

.archive-month-item.active {
    background: var(--bg-tertiary);
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: inset 2px 2px 0 var(--shadow);
}

.archive-month-name {
    display: inline-flex;
    align-items: center;
}

.archive-content {
    flex: 1;
    min-width: 0;
}

.archive-posts-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    margin-bottom: 20px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--accent);
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    animation: pixelAppear 0.3s steps(6);
}

.archive-current-month {
    color: var(--accent);
    font-size: 16px;
    font-weight: bold;
}

.archive-hint {
    color: var(--text-muted);
    font-size: 13px;
}

.archive-posts-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.archive-post-item {
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    padding: 16px 20px;
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
    animation: fadeInUp 0.5s ease-out both;
    transition: all 0.2s ease;
}

.archive-post-item:nth-child(1) { animation-delay: 0.05s; }
.archive-post-item:nth-child(2) { animation-delay: 0.1s; }
.archive-post-item:nth-child(3) { animation-delay: 0.15s; }
.archive-post-item:nth-child(4) { animation-delay: 0.2s; }
.archive-post-item:nth-child(5) { animation-delay: 0.25s; }
.archive-post-item:nth-child(6) { animation-delay: 0.3s; }
.archive-post-item:nth-child(7) { animation-delay: 0.35s; }
.archive-post-item:nth-child(8) { animation-delay: 0.4s; }

.archive-post-item:hover {
    border-color: var(--accent);
    box-shadow:
        2px 2px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--accent),
        inset 2px 2px 0 0 var(--accent-light);
}

.archive-post-item h3 {
    margin: 0 0 8px 0;
    font-size: 16px;
    font-weight: normal;
}

.archive-post-title {
    color: var(--accent);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.archive-post-title::before {
    content: "⮞ ";
    color: var(--accent-secondary);
    transition: transform 0.1s steps(2);
}

.archive-post-item:hover .archive-post-title::before {
    animation: pixelArrow 0.3s steps(3) infinite;
}

.archive-post-title:hover {
    color: var(--accent-light);
    text-shadow: 2px 2px 0 var(--shadow);
}

.archive-post-date {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.archive-post-date::before {
    content: "📆 ";
}

.archive-post-summary {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 8px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    box-shadow: inset 2px 2px 0 var(--shadow);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.archive-no-posts {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
    font-size: 14px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border-light);
    box-shadow:
        4px 4px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
}

.archive-no-posts::before {
    content: "📭 ";
    font-size: 24px;
    display: block;
    margin-bottom: 12px;
}

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

.archive-posts-list li {
    padding: 0.8rem 0;
    border-bottom: 1px dashed var(--accent);
}

.archive-posts-list li a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: block;
}

.archive-posts-list li a:hover {
    color: var(--accent-light);
    padding-left: 5px;
    text-shadow: 1px 1px 0 var(--shadow);
}

/* Archive nav button */
.nav-archive {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    text-decoration: none;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    cursor: pointer;
}

.nav-archive:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    text-decoration: none;
}

/* Nav links: 关于 / 旧站索引 —— 与 文章归档 / Tags 一致的像素按钮样式 */
.nav-about,
.nav-oldsite,
.nav-categories {
    padding: 8px 12px;
    font-family: var(--font-pixel);
    font-size: 12px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    text-decoration: none;
    box-shadow:
        inset -2px -2px 0 0 var(--shadow),
        inset 2px 2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
    transition: all 0.1s steps(2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    cursor: pointer;
}

.nav-about:hover,
.nav-oldsite:hover,
.nav-categories:hover {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    text-decoration: none;
}

/* Current/selected nav item (matches the page being viewed) */
.nav-archive.nav-current,
.nav-tags.nav-current,
.nav-about.nav-current,
.nav-oldsite.nav-current,
.nav-categories.nav-current {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
    box-shadow:
        inset 2px 2px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--bg-secondary),
        2px 2px 0 0 var(--shadow);
}

.nav-archive.nav-current:hover,
.nav-tags.nav-current:hover,
.nav-about.nav-current:hover,
.nav-oldsite.nav-current:hover,
.nav-categories.nav-current:hover {
    background: var(--accent-light);
    border-color: var(--accent-light);
}

/* Responsive archive */
@media (max-width: 768px) {
    .archive-container {
        flex-direction: column;
    }

    .archive-sidebar {
        width: 100%;
    }

    .archive-tree {
        position: static;
        max-height: none;
    }

    .archive-posts-header {
        flex-wrap: wrap;
    }
}


/* 404 page */
.error-page {
    text-align: center;
    padding: 48px 20px;
    background: var(--bg-secondary);
    border: var(--pixel-border) solid var(--border);
    box-shadow:
        8px 8px 0 0 var(--shadow),
        inset -2px -2px 0 0 var(--border-light),
        inset 2px 2px 0 0 var(--bg-tertiary);
}

.error-code {
    font-size: 96px;
    line-height: 1;
    color: var(--accent);
    text-shadow: 4px 4px 0 var(--shadow);
    margin-bottom: 16px;
    letter-spacing: 8px;
}

.error-title {
    font-size: 22px;
    color: var(--accent);
    margin-bottom: 16px;
}

.error-text {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.error-home-link {
    display: inline-block;
    padding: 10px 20px;
    font-family: var(--font-pixel);
    font-size: 14px;
    background: var(--accent);
    color: var(--bg-primary);
    text-decoration: none;
    border: var(--pixel-border) solid var(--bg-primary);
    box-shadow:
        inset -3px -3px 0 0 var(--accent-secondary),
        inset 3px 3px 0 0 var(--accent-light),
        4px 4px 0 0 var(--shadow);
}

.error-home-link:hover {
    background: var(--accent-secondary);
}

@media (max-width: 768px) {
    .error-code {
        font-size: 64px;
    }
}

/* AdSense 广告位（in-article 正文内嵌） */
.ad-slot {
    position: relative;
    margin: 28px 0;
    padding: 0;
    text-align: center;
    /* 不要用 overflow:hidden，会裁切广告内容 */
}

.ad-slot ins.adsbygoogle {
    display: block;
    width: 100%;
}

@media (max-width: 768px) {
    .ad-slot {
        margin: 20px 0;
    }
}

/* 页脚链接（旧站索引等） */
.terminal-links {
    margin-top: 6px;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px dashed var(--border);
    padding-bottom: 1px;
}

.footer-link:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}


/* 页脚分隔符 */
.footer-sep {
    margin: 0 8px;
    color: var(--text-muted);
}