/* ============================================
   0CCh Blog - Apple-style Theme
   ============================================ */

/* CSS Variables - Light Theme */
:root {
  --bg: #ffffff;
  --bg-secondary: #f5f5f7;
  --bg-tertiary: #e8e8ed;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --border: #d2d2d7;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --card-bg: #ffffff;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 0 0 1px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 4px 16px rgba(0,0,0,0.1), 0 0 0 1px rgba(0,0,0,0.06);
  --code-bg: #f5f5f7;
  --code-text: #1d1d1f;
  --nav-bg: rgba(255,255,255,0.72);
  --nav-border: rgba(0,0,0,0.08);
  --link: #0071e3;
  --selection: #0071e3;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --max-width: 1100px;
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Monaco, Consolas, monospace;
  --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* Dark Theme */
[data-theme="dark"] {
  --bg: #000000;
  --bg-secondary: #1c1c1e;
  --bg-tertiary: #2c2c2e;
  --text: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-tertiary: #6e6e73;
  --border: #38383a;
  --accent: #0a84ff;
  --accent-hover: #409cff;
  --card-bg: #1c1c1e;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.06);
  --card-shadow-hover: 0 4px 16px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.08);
  --code-bg: #2c2c2e;
  --code-text: #f5f5f7;
  --nav-bg: rgba(0,0,0,0.72);
  --nav-border: rgba(255,255,255,0.1);
  --link: #0a84ff;
  --selection: #0a84ff;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

::selection { background: var(--selection); color: #fff; }

a { color: var(--link); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; border-radius: var(--radius-sm); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Header / Navigation */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--nav-border);
  transition: background var(--transition), border-color var(--transition);
}

.nav { height: 52px; }
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
}
.nav-brand:hover { color: var(--accent); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.nav-link:hover { color: var(--text); background: var(--bg-secondary); }

.nav-search-btn, .nav-theme-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.nav-search-btn:hover, .nav-theme-btn:hover {
  color: var(--text);
  background: var(--bg-secondary);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 4px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* Search Overlay */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}
.search-overlay.active { display: flex; }
.search-box {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 600px;
  padding: 16px;
  box-shadow: var(--card-shadow-hover);
}
#search-input {
  width: 100%;
  border: none;
  outline: none;
  background: var(--bg-secondary);
  color: var(--text);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-family: var(--font-sans);
}
.search-results {
  margin-top: 8px;
  max-height: 50vh;
  overflow-y: auto;
}
.search-result-item {
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
}
.search-result-item:hover { background: var(--bg-secondary); }
.search-result-item a { color: var(--text); font-weight: 500; }
.search-result-item p { color: var(--text-tertiary); font-size: 13px; margin-top: 2px; }
.search-close {
  position: fixed;
  top: 20px;
  right: 30px;
  background: none;
  border: none;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
  line-height: 1;
}

/* Main content */
.main { flex: 1; padding: 40px 0 60px; }

/* Post cards (home) */
.post-list { display: flex; flex-direction: column; gap: 20px; }
.post-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}
.post-card-link { display: block; color: inherit; padding: 24px 28px; }
.post-card-link:hover { color: inherit; }
.post-card-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 8px;
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-tertiary);
  margin-bottom: 10px;
}
.post-card-cat {
  background: var(--bg-secondary);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
}
.post-card-excerpt {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Article (post page) */
.article { position: relative; }
.post-header { margin-bottom: 32px; }
.post-title {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 12px;
}
.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-tertiary);
}
.post-meta-sep { color: var(--text-tertiary); }
.post-cat {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
}
.post-tag { color: var(--accent); font-size: 13px; }

/* TOC */
.post-body { position: relative; }
.toc {
  position: fixed;
  top: 80px;
  left: calc(50% + 560px);
  width: 200px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  font-size: 13px;
}
.toc-title {
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.05em;
}
.toc ol, .toc ul { list-style: none; padding-left: 0; }
.toc ol ol, .toc ul ul { padding-left: 14px; }
.toc a {
  display: block;
  color: var(--text-tertiary);
  padding: 4px 0;
  line-height: 1.4;
  transition: color 0.2s;
  border-left: 2px solid transparent;
  padding-left: 10px;
}
.toc a:hover { color: var(--accent); }
.toc a.active { color: var(--accent); border-left-color: var(--accent); }

/* Post content */
.post-content { }

.post-content.full { max-width: none; }
.post-content h2 {
  font-size: 26px; font-weight: 600; letter-spacing: -0.02em;
  margin-top: 2em; margin-bottom: 0.6em; color: var(--text);
}
.post-content h3 {
  font-size: 21px; font-weight: 600;
  margin-top: 1.8em; margin-bottom: 0.5em; color: var(--text);
}
.post-content h4 { font-size: 17px; font-weight: 600; margin-top: 1.5em; margin-bottom: 0.5em; }
.post-content p { margin-bottom: 1.2em; color: var(--text); }
.post-content ul, .post-content ol { margin-bottom: 1.2em; padding-left: 1.5em; }
.post-content li { margin-bottom: 0.4em; }
.post-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 8px 20px;
  margin: 1.5em 0;
  background: var(--bg-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
}
.post-content img { border-radius: var(--radius); margin: 1.5em auto; display: block; }
.post-content a { word-break: break-word; }
.post-content hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }

/* Inline code */
.post-content code, .post-content kbd {
  font-family: var(--font-mono);
  background: var(--code-bg);
  color: var(--code-text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}
.post-content kbd {
  border: 1px solid var(--border);
  box-shadow: 0 1px 0 var(--border);
}

/* Code blocks */
.post-content pre {
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.6;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
}
.post-content pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  color: var(--code-text);
}

/* Tables */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}
.post-content th, .post-content td {
  padding: 10px 16px;
  border: 1px solid var(--border);
  text-align: left;
}
.post-content th { background: var(--bg-secondary); font-weight: 600; }

/* Post footer / nav */
.post-footer { margin-top: 48px; }
.post-nav {
  display: flex;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.post-nav-prev, .post-nav-next {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border-radius: var(--radius);
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  color: var(--text);
  transition: transform var(--transition);
}
.post-nav-prev:hover, .post-nav-next:hover { transform: translateY(-2px); color: var(--text); }
.post-nav-next { text-align: right; }
.post-nav-label { font-size: 12px; color: var(--text-tertiary); }
.post-nav-title { font-size: 14px; font-weight: 500; color: var(--accent); }

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.pagination a, .pagination .page-current {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.pagination a:hover { background: var(--bg-secondary); color: var(--text); }
.pagination .page-current { background: var(--accent); color: #fff; font-weight: 600; }
.pagination .page-prev, .pagination .page-next { padding: 0 16px; }

/* Archive page */
.archive-year {
  font-size: 28px; font-weight: 700; letter-spacing: -0.02em;
  color: var(--text); margin: 32px 0 16px;
  position: sticky; top: 60px;
  background: var(--bg);
  padding: 8px 0;
  z-index: 5;
}
.archive-list { list-style: none; padding: 0; }
.archive-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.archive-date { color: var(--text-tertiary); font-size: 13px; font-family: var(--font-mono); flex-shrink: 0; width: 50px; }
.archive-link { color: var(--text); font-size: 15px; }
.archive-link:hover { color: var(--accent); }

/* Category/Tag index pages */
.page-title { font-size: 32px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 32px; }
.category-list { list-style: none; padding: 0; }
.category-item a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  margin-bottom: 10px;
  color: var(--text);
  transition: transform var(--transition);
}
.category-item a:hover { transform: translateY(-1px); color: var(--text); }
.category-count { color: var(--text-tertiary); font-size: 14px; background: var(--bg-secondary); padding: 2px 12px; border-radius: 20px; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud-link {
  display: inline-block;
  padding: 6px 16px;
  background: var(--card-bg);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  color: var(--text-secondary);
  transition: all var(--transition);
  line-height: 1.5;
}
.tag-cloud-link:hover { color: var(--accent); transform: translateY(-1px); }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  background: var(--bg-secondary);
  transition: background var(--transition), border-color var(--transition);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.footer-info { font-size: 13px; color: var(--text-tertiary); }
.footer-info p { margin-bottom: 2px; }
.footer-info a { color: var(--text-secondary); }
.footer-social { display: flex; gap: 16px; }
.social-link { font-size: 13px; color: var(--text-secondary); }
.social-link:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 900px) {
  .toc { display: none; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 52px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--nav-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--nav-border);
    padding: 16px 22px;
    gap: 2px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }
  .nav-menu.active { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { padding: 12px; width: 100%; }
  .nav-search-btn, .nav-theme-btn { margin-left: auto; }
  
  .post-title { font-size: 26px; }
  .post-card-title { font-size: 19px; }
  .post-card-link { padding: 20px; }
  .container { padding: 0 18px; }
  .post-nav { flex-direction: column; }
  .post-nav-next { text-align: left; }
  .footer-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .post-title { font-size: 23px; }
  .post-content { font-size: 15px; }
  .post-content pre { font-size: 13px; padding: 14px; }
  body { font-size: 15px; }
}

/* Extra mobile optimizations */
@media (max-width: 768px) {
  .container-wide { padding: 0 18px; }
  .article { max-width: 100%; }
  .post-header { margin-bottom: 24px; }
  .post-meta { gap: 6px; font-size: 13px; }
  .post-content h2 { font-size: 22px; }
  .post-content h3 { font-size: 19px; }
  .post-content blockquote { padding: 12px 16px; margin: 1.2em 0; }
  .post-content pre { font-size: 13px; padding: 14px; border-radius: 10px; }
  .post-content table { font-size: 13px; }
  .post-content img { border-radius: 10px; }
  .post-card { border-radius: 10px; }
  .post-card-link { padding: 18px; }
  .post-card-title { font-size: 18px; }
  .post-card-excerpt { font-size: 14px; -webkit-line-clamp: 2; }
  .archive-year { font-size: 22px; position: static; }
  .archive-item { flex-direction: column; gap: 4px; padding: 8px 0; }
  .archive-date { width: auto; }
  .post-nav { gap: 10px; }
  .post-nav-prev, .post-nav-next { padding: 12px; }
  .search-box { width: 94%; padding: 12px; }
  .main { padding: 24px 0 40px; }
}

@media (max-width: 480px) {
  .post-title { font-size: 21px; line-height: 1.3; }
  .post-content { font-size: 15px; }
  .post-content h2 { font-size: 20px; }
  .post-content h3 { font-size: 17px; }
  .post-content pre { font-size: 12px; padding: 12px; }
  body { font-size: 15px; }
  .container, .container-wide { padding: 0 16px; }
  .nav-container { padding: 0 16px; }
  .post-card-link { padding: 16px; }
  .post-card-title { font-size: 17px; }
}


/* ============================================
   Code Highlighting (Prism.js - Apple style)
   ============================================ */
.post-content pre[class*="language-"],
.post-content pre {
  background: var(--code-bg);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.6;
  border: 1px solid var(--border);
}

code[class*="language-"],
pre[class*="language-"] {
  font-family: var(--font-mono);
  color: var(--text);
}

/* Prism token colors - Light */
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: var(--text-tertiary); font-style: italic; }
.token.punctuation { color: #999; }
.token.property, .token.tag, .token.boolean, .token.number, .token.constant, .token.symbol { color: #905; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #690; }
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string { color: #9a6e3a; }
.token.atrule, .token.attr-value, .token.keyword { color: #07a; }
.token.function, .token.class-name { color: #dd4a68; }
.token.regex, .token.important, .token.variable { color: #e90; }
.token.important, .token.bold { font-weight: bold; }
.token.italic { font-style: italic; }

/* Prism token colors - Dark */
[data-theme="dark"] .token.comment, [data-theme="dark"] .token.prolog, [data-theme="dark"] .token.doctype, [data-theme="dark"] .token.cdata { color: #6e6e73; }
[data-theme="dark"] .token.punctuation { color: #86868b; }
[data-theme="dark"] .token.property, [data-theme="dark"] .token.tag, [data-theme="dark"] .token.boolean, [data-theme="dark"] .token.number, [data-theme="dark"] .token.constant, [data-theme="dark"] .token.symbol { color: #ff6b9d; }
[data-theme="dark"] .token.selector, [data-theme="dark"] .token.attr-name, [data-theme="dark"] .token.string, [data-theme="dark"] .token.char, [data-theme="dark"] .token.builtin, [data-theme="dark"] .token.inserted { color: #7ee787; }
[data-theme="dark"] .token.operator, [data-theme="dark"] .token.entity, [data-theme="dark"] .token.url, [data-theme="dark"] .language-css .token.string, [data-theme="dark"] .style .token.string { color: #d2a8ff; }
[data-theme="dark"] .token.atrule, [data-theme="dark"] .token.attr-value, [data-theme="dark"] .token.keyword { color: #79c0ff; }
[data-theme="dark"] .token.function, [data-theme="dark"] .token.class-name { color: #d2a8ff; }
[data-theme="dark"] .token.regex, [data-theme="dark"] .token.important, [data-theme="dark"] .token.variable { color: #ffa657; }

/* Line numbers (if enabled) */
pre[class*="language-"].line-numbers { position: relative; padding-left: 3.5em; counter-reset: linenumber; }
.line-numbers .line-numbers-rows { position: absolute; pointer-events: none; top: 18px; left: 0; width: 3em; letter-spacing: -1px; border-right: 1px solid var(--border); user-select: none; }
.line-numbers-rows > span { display: block; counter-increment: linenumber; }
.line-numbers-rows > span:before { content: counter(linenumber); color: var(--text-tertiary); display: block; text-align: right; padding-right: 12px; font-size: 13px; }

/* Fancybox-style image links */
.post-content a img { cursor: zoom-in; }
.post-content a[href$=".png"] img,
.post-content a[href$=".jpg"] img,
.post-content a[href$=".gif"] img,
.post-content a[href$=".webp"] img { cursor: zoom-in; transition: opacity 0.2s; }
.post-content a[href$=".png"]:hover img,
.post-content a[href$=".jpg"]:hover img,
.post-content a[href$=".gif"]:hover img,
.post-content a[href$=".webp"]:hover img { opacity: 0.9; }

/* PDF embed (hexo-pdf-better) */
.post-content .pdf-container,
.post-content iframe { width: 100%; border-radius: var(--radius); border: 1px solid var(--border); margin: 1.5em 0; }

/* Callout boxes (from old theme) */
.post-content .callout { border-radius: var(--radius); padding: 16px 20px; margin: 1.5em 0; border-left: 4px solid var(--accent); background: var(--bg-secondary); }
.post-content .callout-info { border-left-color: var(--accent); }
.post-content .callout-warning { border-left-color: #ff9500; }
.post-content .callout-danger { border-left-color: #ff3b30; }

/* Scrollbar styling */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* Smooth transitions for theme switch */
body, .header, .footer, .post-card, .nav-link, .toc a, 
.post-nav-prev, .post-nav-next, .category-item a, .tag-cloud-link,
.search-box, #search-input, .archive-item {
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}