/* ============================================
   Literary — A clean, literary Hugo theme
   Crafted for comfortable reading
   ============================================ */

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

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

body {
  font-family:
    -apple-system,
    "PingFang SC",
    "Noto Sans CJK SC",
    "Source Han Sans SC",
    "Microsoft YaHei",
    sans-serif;
  font-size: 1rem;
  line-height: 1.9;
  color: #2d2d2d;
  background-color: #faf7f2;
  min-height: 100vh;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family:
    "Noto Serif CJK SC",
    "Source Han Serif SC",
    "STSong",
    "SimSun",
    "Georgia",
    serif;
  font-weight: 600;
  line-height: 1.5;
  color: #1a1a1a;
  margin: 2.2em 0 1em;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.45rem; border-bottom: 1px solid #eee; padding-bottom: 0.4em; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.1rem; }

p {
  margin: 0 0 1.2em;
  line-height: 1.9;
}

a {
  color: #b85c38;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #8a4528;
  text-decoration: underline;
}

strong, b {
  font-weight: 600;
  color: #1a1a1a;
}

em, i {
  font-style: italic;
}

blockquote {
  margin: 1.8em 0;
  padding: 0.8em 1.2em 0.8em 1.8em;
  border-left: 3px solid #d4c5b0;
  background: #f5f0e8;
  color: #5a5a5a;
  font-style: normal;
  border-radius: 0 4px 4px 0;
}

blockquote p {
  margin: 0.4em 0;
}

blockquote p:last-child {
  margin-bottom: 0;
}

code {
  font-family:
    "SF Mono",
    "JetBrains Mono",
    "Fira Code",
    "Cascadia Code",
    "Menlo",
    "Consolas",
    monospace;
  font-size: 0.875em;
  background: #f0ece4;
  color: #6b4c3b;
  padding: 2px 6px;
  border-radius: 3px;
  word-break: break-word;
}

pre {
  margin: 1.5em 0;
  padding: 1em 1.2em;
  background: #f5f2ed;
  border: 1px solid #e8e3d9;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
  white-space: pre;
  word-break: normal;
}

pre::-webkit-scrollbar {
  height: 6px;
}

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

pre::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 3px;
}

:not(pre) > code {
  white-space: normal;
}

ul, ol {
  margin: 1em 0;
  padding-left: 1.8em;
}

li {
  margin: 0.4em 0;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 1.2em 0;
  display: block;
}

hr {
  border: none;
  height: 1px;
  background: #e8e3d9;
  margin: 2.5em 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}

th, td {
  padding: 0.6em 0.8em;
  border: 1px solid #e0dbd0;
  text-align: left;
}

th {
  background: #f5f2ed;
  font-weight: 600;
}

/* --- Layout --- */
.wrapper {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header --- */
.site-header {
  padding: 2.5em 0 1.5em;
  border-bottom: 1px solid #e8e3d9;
  margin-bottom: 2em;
}

.site-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5em;
}

.site-title {
  font-family:
    "Noto Serif CJK SC",
    "Source Han Serif SC",
    "Georgia",
    serif;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 2px;
}

.site-title a {
  color: #1a1a1a;
  text-decoration: none;
}

.site-title a:hover {
  color: #b85c38;
  text-decoration: none;
}

.site-subtitle {
  font-size: 0.85rem;
  color: #8a8a8a;
  margin-top: 0.2em;
  font-weight: 400;
}

/* --- Navigation --- */
.main-nav {
  display: flex;
  gap: 1.5em;
  align-items: center;
  flex-wrap: wrap;
}

.main-nav a {
  font-size: 0.9rem;
  color: #6b6b6b;
  text-decoration: none;
  padding: 0.3em 0;
  position: relative;
  transition: color 0.2s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: #b85c38;
  transition: width 0.2s ease;
}

.main-nav a:hover {
  color: #1a1a1a;
  text-decoration: none;
}

.main-nav a:hover::after {
  width: 100%;
}

.main-nav a.active {
  color: #1a1a1a;
}

/* --- Content Area --- */
.content {
  min-height: 50vh;
}

/* --- Post List (Homepage) --- */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-item {
  padding: 1.2em 0;
  border-bottom: 1px solid #f0ebe3;
}

.post-item:first-child {
  padding-top: 0;
}

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

.post-item-meta {
  font-size: 0.8rem;
  color: #9a9a9a;
  margin-bottom: 0.3em;
  font-variant-numeric: tabular-nums;
}

.post-item-title {
  font-family:
    "Noto Serif CJK SC",
    "Source Han Serif SC",
    "Georgia",
    serif;
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
}

.post-item-title a {
  color: #1a1a1a;
  text-decoration: none;
}

.post-item-title a:hover {
  color: #b85c38;
  text-decoration: none;
}

.post-item-summary {
  font-size: 0.9rem;
  color: #6b6b6b;
  margin-top: 0.4em;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-item-tags {
  margin-top: 0.5em;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  color: #8a8a8a;
  background: #f0ece4;
  padding: 0.15em 0.6em;
  border-radius: 3px;
  text-decoration: none;
  transition: all 0.2s;
}

.tag:hover {
  color: #fff;
  background: #b85c38;
  text-decoration: none;
}

/* --- Single Post --- */
.post-header {
  margin-bottom: 2em;
}

.post-title {
  font-family:
    "Noto Serif CJK SC",
    "Source Han Serif SC",
    "Georgia",
    serif;
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.4;
  color: #1a1a1a;
  margin: 0 0 0.3em;
}

.post-meta {
  font-size: 0.85rem;
  color: #9a9a9a;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3em 1em;
  align-items: center;
}

.post-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.95;
  color: #2d2d2d;
}

.post-content p {
  margin-bottom: 1.3em;
}

/* --- Post Footer (Tags, Share) --- */
.post-footer {
  margin-top: 3em;
  padding-top: 1.5em;
  border-top: 1px solid #e8e3d9;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  align-items: center;
}

.post-tags-label {
  font-size: 0.85rem;
  color: #8a8a8a;
}

/* --- Page Navigation (prev/next) --- */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2em;
  gap: 1em;
  flex-wrap: wrap;
}

.post-nav a {
  font-size: 0.9rem;
  color: #b85c38;
  max-width: 45%;
  text-decoration: none;
}

.post-nav a:hover {
  text-decoration: underline;
}

/* --- Pagination --- */
.pagination {
  display: flex;
  justify-content: center;
  gap: 0.8em;
  margin: 2.5em 0;
  padding-top: 1.5em;
  border-top: 1px solid #e8e3d9;
}

.pagination a,
.pagination span {
  display: inline-block;
  padding: 0.4em 0.8em;
  font-size: 0.9rem;
  color: #6b6b6b;
  border: 1px solid #e0dbd0;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s;
}

.pagination a:hover {
  color: #fff;
  background: #b85c38;
  border-color: #b85c38;
  text-decoration: none;
}

.pagination .active {
  color: #fff;
  background: #b85c38;
  border-color: #b85c38;
}

/* --- Archive Page --- */
.archive-year {
  margin-bottom: 2em;
}

.archive-year-title {
  font-family:
    "Noto Serif CJK SC",
    "Source Han Serif SC",
    "Georgia",
    serif;
  font-size: 1.4rem;
  font-weight: 600;
  color: #1a1a1a;
  border-bottom: 2px solid #e8e3d9;
  padding-bottom: 0.3em;
  margin-bottom: 0.8em;
}

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

.archive-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.4em 0;
  gap: 1em;
}

.archive-item a {
  color: #2d2d2d;
  text-decoration: none;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.archive-item a:hover {
  color: #b85c38;
  text-decoration: none;
}

.archive-item-date {
  font-size: 0.8rem;
  color: #9a9a9a;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  flex-shrink: 0;
}

/* --- Tags Page --- */
.tags-page {
  text-align: center;
  padding: 2em 0;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8em;
  padding: 1em 0;
}

.tags-cloud a {
  display: inline-block;
  padding: 0.4em 1em;
  background: #f5f2ed;
  color: #5a5a5a;
  border-radius: 20px;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.2s;
}

.tags-cloud a:hover {
  background: #b85c38;
  color: #fff;
  text-decoration: none;
}

.tags-cloud .tag-count {
  font-size: 0.75rem;
  color: #aaa;
  margin-left: 0.3em;
}

.tags-cloud a:hover .tag-count {
  color: rgba(255,255,255,0.7);
}

/* --- Footer --- */
.site-footer {
  margin-top: 4em;
  padding: 2em 0;
  border-top: 1px solid #e8e3d9;
  text-align: center;
  font-size: 0.8rem;
  color: #9a9a9a;
}

.site-footer a {
  color: #8a8a8a;
}

.site-footer a:hover {
  color: #b85c38;
}

.site-footer p {
  margin: 0.3em 0;
}

/* --- 404 --- */
.page-404 {
  text-align: center;
  padding: 4em 0;
}

.page-404 h1 {
  font-size: 4rem;
  color: #d4c5b0;
  margin: 0;
}

.page-404 p {
  color: #8a8a8a;
  margin-top: 1em;
}

/* --- Back to Top --- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0,0,0,0.06);
  color: #8a8a8a;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  text-decoration: none;
  transition: all 0.3s;
  z-index: 100;
}

.back-to-top:hover {
  background: #b85c38;
  color: #fff;
  text-decoration: none;
}

.back-to-top.visible {
  display: flex;
}

/* --- MathJax --- */
.mathjax-warning {
  text-align: center;
  font-size: 0.8rem;
  color: #aaa;
  padding: 1em 0;
}

/* --- Image in content --- */
.post-content img {
  max-width: 100%;
  height: auto;
  margin: 1.5em auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  html {
    font-size: 15px;
  }

  .wrapper {
    padding: 0 16px;
  }

  .site-header {
    padding: 1.5em 0 1em;
  }

  .site-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-title {
    font-size: 1.4rem;
  }

  .main-nav {
    gap: 1em;
  }

  .main-nav a {
    font-size: 0.85rem;
  }

  .post-title {
    font-size: 1.5rem;
  }

  .post-content {
    font-size: 1rem;
  }

  .post-content blockquote {
    margin: 1.2em 0;
    padding: 0.6em 1em;
    padding-left: 1.2em;
  }

  .post-content pre {
    margin: 1em 0;
    padding: 0.8em 1em;
    font-size: 0.8rem;
    border-radius: 4px;
  }

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

  .post-nav a {
    max-width: 100%;
  }

  .archive-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2em;
  }

  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  .tags-cloud a {
    font-size: 0.85rem;
    padding: 0.3em 0.8em;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.3rem; }
  h3 { font-size: 1.1rem; }
}

@media (max-width: 380px) {
  html {
    font-size: 14px;
  }

  .wrapper {
    padding: 0 12px;
  }
}

/* --- Print --- */
@media print {
  body {
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  .back-to-top,
  .main-nav,
  .post-nav {
    display: none !important;
  }

  .wrapper {
    max-width: 100%;
    padding: 0;
  }

  a {
    color: #000 !important;
  }

  pre {
    white-space: pre-wrap;
    word-break: break-word;
  }
}

/* --- Smooth reveal for post items --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post-item {
  animation: fadeInUp 0.4s ease both;
}

.post-item:nth-child(1) { animation-delay: 0.02s; }
.post-item:nth-child(2) { animation-delay: 0.04s; }
.post-item:nth-child(3) { animation-delay: 0.06s; }
.post-item:nth-child(4) { animation-delay: 0.08s; }
.post-item:nth-child(5) { animation-delay: 0.10s; }
.post-item:nth-child(6) { animation-delay: 0.12s; }
.post-item:nth-child(7) { animation-delay: 0.14s; }
.post-item:nth-child(8) { animation-delay: 0.16s; }
.post-item:nth-child(9) { animation-delay: 0.18s; }
.post-item:nth-child(10) { animation-delay: 0.20s; }