/**
 * Hexo Theme Claude - Stylesheet
 * Minimalist, Content-First & Claude Warm Terracotta Palette
 */

:root {
  --bg-page: #faf9f5;
  --bg-surface: #ffffff;
  --bg-subtle: #f4f3ee;
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --border-color: #e4e4e7;
  --border-subtle: #f4f4f5;

  /* Claude Code Official Palette */
  --brand: #d97757;
  --brand-hover: #c15f3c;
  --brand-subtle: rgba(217, 119, 87, 0.10);
  --brand-border: rgba(217, 119, 87, 0.35);

  --code-bg: #f4f3ee;
  --font-sans: -apple-system, BlinkMacSystemFont, "Plus Jakarta Sans", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease, color 0.2s ease;
}

::selection {
  background-color: var(--brand-subtle);
  color: var(--brand);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--brand);
}

/* ---------------------------------------------------------
   Layout Containers
--------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 48rem; /* 768px */
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.container-wide {
  width: 100%;
  max-width: 72rem; /* 1152px */
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* ---------------------------------------------------------
   Header / Navbar
--------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  width: 100%;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(250, 249, 245, 0.90);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.site-header .nav-inner {
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;

}

.site-header .nav-link {
  /* font-size: 1rem; */
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.search-trigger {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0.625rem;
  border-radius: 0.375rem;
  transition: all 0.15s ease;
}

.search-trigger:hover {
  color: var(--text-primary);
  background-color: var(--bg-subtle);
}

.search-kbd {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 0.05rem 0.25rem;
  border-radius: 0.25rem;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.15s ease;
  position: relative;
  padding: 0.25rem 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--brand);
  border-radius: 9999px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.375rem;
  border-radius: 0.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.icon-btn:hover {
  color: var(--text-primary);
  background-color: var(--bg-subtle);
}

/* ---------------------------------------------------------
   Article Stream / Post List (Content-Driven)
--------------------------------------------------------- */
.article-stream {
  padding-top: 2rem;
  padding-bottom: 3.5rem;
}

.article-item {
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  transition: transform 0.15s ease;
}

.article-item:first-child {
  padding-top: 0.5rem;
}

.article-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-title {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  transition: color 0.15s ease;
}

.article-item:hover .article-title {
  color: var(--brand);
}

.article-summary {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.article-tags a:hover {
  color: var(--brand);
}

/* ---------------------------------------------------------
   Post Detail Page (2-Column With Right Sticky TOC)
--------------------------------------------------------- */
.post-layout {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 2.5rem;
  padding-top: 2rem;
  padding-bottom: 3.5rem;
  position: relative;
}

.post-content-column {
  width: 100%;
  max-width: 48rem;
  min-width: 0;
}

.post-header {
  margin-bottom: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.post-header .meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.post-header .title {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

@media (min-width: 640px) {
  .post-header .title {
    font-size: 1.75rem;
  }
}

/* ---------------------------------------------------------
   Right-Side Sticky Table of Contents (TOC)
--------------------------------------------------------- */
.post-toc-column {
  display: none;
  width: 15rem; /* 240px */
  flex-shrink: 0;
  position: sticky;
  top: 5rem;
  align-self: flex-start;
}

@media (min-width: 1024px) {
  .post-toc-column {
    display: block;
  }
}

.toc-card {
  max-height: calc(100vh - 7rem);
  overflow-y: auto;
  padding-left: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  font-size: 0.75rem;
}

.toc-nav a {
  display: block;
  padding: 0.375rem 0.625rem;
  border-radius: 0 0.25rem 0.25rem 0;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-left: 2px solid transparent;
  transition: all 0.15s ease;
}

.toc-nav a:hover {
  color: var(--text-primary);
  background-color: var(--bg-subtle);
}

.toc-nav a.active {
  color: var(--brand);
  background-color: var(--brand-subtle);
  border-left: 2px solid var(--brand);
  font-weight: 500;
}

.toc-nav .toc-level-3 {
  padding-left: 1.25rem;
  font-size: 0.6875rem;
}

/* ---------------------------------------------------------
   Markdown Typography & Prose
--------------------------------------------------------- */
.prose {
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 0.9375rem;
}

.prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6 {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  scroll-margin-top: 5rem;
}

.prose h2 {
  font-size: 1.25rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid var(--border-subtle);
}

.prose h3 {
  font-size: 1.0625rem;
}

.prose p {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  background-color: var(--code-bg);
  color: var(--brand);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
}

.prose pre {
  position: relative;
  background-color: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
}

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

/* Hexo highlighted block: figure > table > gutter + code */
.prose figure.highlight {
  position: relative;
  margin: 1.25rem 0;
  background-color: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
}

.prose figure.highlight table {
  width: 100%;
  margin: 0;
  border-collapse: collapse;
}

.prose figure.highlight td {
  padding: 0;
  vertical-align: top;
}

.prose figure.highlight pre {
  margin: 0;
  padding: 0.875rem 1rem;
  background-color: transparent;
  border: none;
  border-radius: 0;
}

.prose figure.highlight .code pre {
  overflow-x: auto;
}

.prose figure.highlight .gutter {
  width: 1%;
  border-right: 1px solid var(--border-color);
  user-select: none;
}

.prose figure.highlight .gutter pre {
  text-align: right;
  color: var(--text-muted);
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

.code-copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.25rem 0.5rem;
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: 0.25rem;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s ease, color 0.15s ease;
  z-index: 1;
}

.prose pre:hover .code-copy-btn,
.prose figure.highlight:hover .code-copy-btn {
  opacity: 1;
}

.code-copy-btn:hover {
  color: var(--brand);
  border-color: var(--brand);
}

.prose blockquote {
  border-left: 3px solid var(--brand);
  background-color: var(--brand-subtle);
  padding: 0.75rem 1rem;
  margin: 1.25rem 0;
  border-radius: 0 0.375rem 0.375rem 0;
  color: var(--text-secondary);
}

.prose ul, .prose ol {
  margin-top: 0.75rem;
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
}

.prose li {
  margin-top: 0.25rem;
  margin-bottom: 0.25rem;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  margin: 1.25rem 0;
}

/* ---------------------------------------------------------
   Post Navigation (Prev / Next Cards)
--------------------------------------------------------- */
.post-nav-container {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .post-nav-container {
    grid-template-columns: 1fr 1fr;
  }
}

.post-nav-card {
  padding: 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  transition: border-color 0.15s ease, transform 0.15s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.post-nav-card:hover {
  border-color: var(--brand);
}

.post-nav-card .label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.post-nav-card .title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-nav-card:hover .title {
  color: var(--brand);
}

/* ---------------------------------------------------------
   Archive Timeline
--------------------------------------------------------- */
.archive-container {
  padding-top: 2rem;
  padding-bottom: 3.5rem;
}

.archive-year-group {
  margin-bottom: 2rem;
}

.archive-year-title {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.75rem;
}

.archive-item {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.5rem 0;
}

.archive-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
  width: 4rem;
}

.archive-link {
  font-size: 0.9375rem;
  color: var(--text-primary);
  transition: color 0.15s ease;
}

.archive-link:hover {
  color: var(--brand);
}

/* ---------------------------------------------------------
   Modal Search
--------------------------------------------------------- */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  background-color: rgba(0, 0, 0, 0.40);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 4rem 1rem 1rem 1rem;
}

.search-modal-backdrop.open {
  display: flex;
}

.search-modal {
  width: 100%;
  max-width: 36rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  animation: modalFadeIn 0.15s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; transform: scale(0.97); }
  to { opacity: 1; transform: scale(1); }
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-color);
  gap: 0.75rem;
}

.search-input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.search-results {
  max-height: 24rem;
  overflow-y: auto;
  padding: 0.5rem;
}

.search-result-item {
  padding: 0.625rem 0.75rem;
  border-radius: 0.375rem;
  cursor: pointer;
  display: block;
  transition: background-color 0.15s ease;
}

.search-result-item:hover,
.search-result-item.selected {
  background-color: var(--brand-subtle);
}

.search-result-item .item-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.search-result-item:hover .item-title {
  color: var(--brand);
}

.search-result-item .item-snippet {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------------------------------------------------------
   Footer
--------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
  }
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}