:root{
  --ink: #1c1b18;
  --ink-2: #232220;
  --paper: #e9e2d3;
  --paper-dim: #a89c85;
  --paper-dimmer: #746a58;
  --seal: #a63a2e;
  --bamboo: #7c8a68;
  --hairline: rgba(233,226,211,0.14);
  --hairline-strong: rgba(233,226,211,0.28);
  --font-serif: 'Songti SC', 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
  --font-num: 'Georgia', 'Times New Roman', serif;
}

html.light{
  --ink: #f3efe6;
  --ink-2: #ece2d0;
  --paper: #2a2620;
  --paper-dim: #5c5346;
  --paper-dimmer: #93866d;
  --bamboo: #5f6f4e;
  --hairline: rgba(42,38,32,0.14);
  --hairline-strong: rgba(42,38,32,0.28);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-serif);
  font-weight: 300;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  transition: background-color .4s ease, color .4s ease;
}
a{ color: inherit; text-decoration: none; }
::selection{ background: var(--seal); color: #f2e9dc; }

.page{
  display: grid;
  grid-template-columns: 92px minmax(0,1fr) 300px;
  max-width: 1360px;
  margin: 0 auto;
  min-height: 100vh;
}

.spine{
  position: sticky;
  top: 0;
  height: 100vh;
  border-right: 1px solid var(--hairline);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 44px 0;
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  animation: fadeIn 1s ease both;
}
.spine-title{
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.5em;
  color: var(--paper);
  transition: color .25s ease;
}
.spine-title:hover,
.spine-title:focus-visible{ color: var(--seal); }
.spine-title span{
  display: block;
  color: var(--paper-dim);
  font-weight: 300;
  font-size: 0.95rem;
  letter-spacing: 0.4em;
  margin-top: 1.4em;
}
.theme-toggle{
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  color: var(--paper-dimmer);
  transition: color .25s ease;
}
.theme-toggle:hover,
.theme-toggle:focus-visible{ color: var(--seal); }
.theme-toggle svg{ width: 18px; height: 18px; display: block; }
.theme-toggle .icon-sun{ display: none; }
html.light .theme-toggle .icon-moon{ display: none; }
html.light .theme-toggle .icon-sun{ display: block; }

.site-main{
  padding: 0 clamp(28px, 5vw, 72px);
  max-width: 760px;
}
.hero{
  padding: clamp(64px, 12vh, 120px) 0 56px;
  border-bottom: 1px solid var(--hairline);
  animation: rise 0.9s ease 0.15s both;
}
.hero-eyebrow,
.page-eyebrow,
.article-eyebrow{
  font-family: var(--font-num);
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  color: var(--bamboo);
  margin: 0 0 22px;
}
.hero h1,
.page-header h1,
.article-header h1{
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 600;
  margin: 0 0 22px;
  letter-spacing: 0.03em;
}
.hero p,
.page-deck,
.article-deck{
  max-width: 52ch;
  color: var(--paper-dim);
  font-size: 1.05rem;
  margin: 0;
}

.breadcrumb{
  margin: 32px 0 0;
  font-size: 0.85rem;
  color: var(--paper-dimmer);
  animation: rise 0.9s ease both;
}
.breadcrumb a{ transition: color .2s ease; }
.breadcrumb a:hover,
.breadcrumb a:focus-visible{ color: var(--seal); }
.page-header,
.article-header{
  padding: 28px 0 40px;
  border-bottom: 1px solid var(--hairline);
  animation: rise 0.9s ease 0.1s both;
}
.article-header{
  padding: 24px 0 30px;
}
.article-eyebrow{
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}
.article-header h1{
  font-size: clamp(1.85rem, 3.8vw, 2.65rem);
  line-height: 1.32;
  letter-spacing: 0.015em;
  margin-bottom: 12px;
}
.article-deck{
  font-size: 1rem;
  line-height: 1.75;
}

.entries{ padding: 8px 0 40px; }
.entry{
  display: grid;
  grid-template-columns: 48px 1fr 130px;
  gap: 24px;
  padding: 40px 0;
  border-bottom: 1px solid var(--hairline);
  animation: rise 0.9s ease both;
}
.entry-num{
  font-family: var(--font-num);
  font-size: 1.3rem;
  color: var(--paper-dimmer);
  padding-top: 2px;
}
.entry-body a{ display: block; }
.entry-title{
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0 0 12px;
  transition: color .25s ease;
}
.entry:hover .entry-title,
.entry:focus-within .entry-title{ color: var(--seal); }
.entry-excerpt{
  color: var(--paper-dim);
  font-size: 0.98rem;
  max-width: 52ch;
  margin: 0;
}
.entry-meta{
  text-align: right;
  font-family: var(--font-num);
}
.entry-date{
  display: block;
  color: var(--paper-dimmer);
  font-size: 0.95rem;
}
.entry-tag{
  display: inline-block;
  margin-top: 10px;
  font-family: var(--font-serif);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--bamboo);
}

.entry-tag a,
.archive-tag a{
  color: inherit;
  transition: color .2s ease;
}
.entry-tag a:hover,
.entry-tag a:focus-visible,
.archive-tag a:hover,
.archive-tag a:focus-visible{
  color: var(--seal);
}

.archive-list{
  list-style: none;
  margin: 8px 0 16px;
  padding: 0;
  animation: rise 0.9s ease 0.25s both;
}
.archive-list li{
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: baseline;
  margin: 0 -10px 6px;
  padding: 10px;
  border-radius: 6px;
  transition: background-color .2s ease;
}
.archive-list li:hover,
.archive-list li:focus-within{
  background: rgba(166,58,46,0.06);
}
.archive-main{
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  align-items: baseline;
  min-width: 0;
}
.archive-date{ font-family: var(--font-num); color: var(--paper-dimmer); font-size: 0.9rem; }
.archive-title{ font-size: 1.03rem; color: var(--paper); transition: color .2s ease; }
.archive-tag{ font-size: 0.76rem; letter-spacing: 0.12em; color: var(--bamboo); text-align: right; white-space: nowrap; transition: color .2s ease; }
.archive-main:hover .archive-title,
.archive-main:focus-visible .archive-title,
a.archive-tag:hover,
a.archive-tag:focus-visible{ color: var(--seal); }

.article-body,
.page-body{
  padding: 44px 0 8px;
  animation: rise 0.9s ease 0.2s both;
}
.article-body p,
.page-body p,
.article-body li{
  margin: 0 0 28px;
  max-width: 60ch;
  font-size: 1.05rem;
}
.article-body a,
.page-body a{ color: var(--seal); border-bottom: 1px solid var(--hairline-strong); }
.page-body .archive-list a{
  border-bottom: none;
}

.article-body blockquote,
.pull-quote{
  margin: 44px 0;
  padding: 2px 0 2px 28px;
  border-left: 3px solid var(--seal);
  font-size: 1.3rem;
  font-style: italic;
  max-width: 46ch;
}
.article-body img,
.page-body img{ max-width: 100%; height: auto; }

.post-nav{
  display: flex;
  justify-content: center;
  padding: 30px 0 44px;
  margin-top: 8px;
  border-top: 1px solid var(--hairline);
}
.post-nav .page-navigator{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}
.post-nav .page-navigator li{
  min-width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0 12px;
  border: 1px solid var(--hairline-strong);
  color: var(--paper-dim);
  font-size: 0.92rem;
  line-height: 1;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.post-nav .page-navigator a,
.post-nav .page-navigator span{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: calc(100% + 24px);
  height: 100%;
  margin: 0 -12px;
  padding: 0 12px;
  color: inherit;
}
.post-nav .page-navigator .current,
.post-nav .page-navigator li:hover,
.post-nav .page-navigator li:focus-within{
  color: var(--seal);
  border-color: var(--seal);
  background: rgba(166,58,46,0.08);
}
.nav-links{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  padding: 36px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.nav-next{ text-align: right; }
.nav-links a{ color: var(--paper); transition: color .2s ease; }
.nav-links a:hover{ color: var(--seal); }

.search-form{
  display: flex;
  gap: 12px;
  padding: 36px 0 24px;
}
.search-field{
  width: 100%;
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--paper);
  font: inherit;
  padding: 10px 12px;
}
.search-submit,
.utility-button{
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--paper);
  font: inherit;
  cursor: pointer;
  padding: 10px 14px;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease;
}
.search-submit:hover,
.utility-button:hover{ color: var(--seal); border-color: var(--seal); }
.error-code{
  font-family: var(--font-num);
  font-size: clamp(4rem, 18vw, 9rem);
  line-height: 1;
  color: var(--paper-dimmer);
  margin: 36px 0 24px;
}
.utility-actions{ display: flex; flex-wrap: wrap; gap: 12px; padding: 28px 0 48px; }

.site-footer{ padding: 40px 0 64px; }
.footer-note{ font-family: var(--font-num); font-style: italic; font-size: 0.88rem; color: var(--paper-dimmer); }

.sidebar{
  border-left: 1px solid var(--hairline);
  padding: clamp(64px, 12vh, 120px) 40px 60px;
  animation: rise 0.9s ease 0.25s both;
}
.sidebar-inner{ position: sticky; top: clamp(64px, 12vh, 120px); }
.sidebar-menu{ margin-bottom: 32px; border-top: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
.sidebar-menu summary{
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  color: var(--paper-dim);
  font-size: 0.86rem;
  letter-spacing: 0.12em;
}
.sidebar-menu summary::-webkit-details-marker{ display: none; }
.sidebar-menu summary::after{ content: "+"; font-family: var(--font-num); color: var(--paper-dimmer); }
.sidebar-menu[open] summary::after{ content: "-"; }
.menu-label{ color: var(--paper); font-weight: 600; }
.menu-current{ color: var(--paper-dimmer); font-family: var(--font-num); font-size: 0.78rem; letter-spacing: 0.04em; }
.sidebar-nav,
.sidebar-nav ul{ list-style: none; margin: 0; padding: 0 0 12px; display: grid; font-size: 0.92rem; color: var(--paper-dim); }
.sidebar-nav li{ margin: 0; }
.sidebar-nav a,
.sidebar-nav .current,
.sidebar-nav .current-menu-item > a,
.sidebar-nav .current_page_item > a{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--hairline);
  transition: color .2s ease;
}
.sidebar-nav a::after{ content: ">"; font-family: var(--font-num); color: var(--paper-dimmer); opacity: 0; transition: opacity .2s ease, color .2s ease; }
.sidebar-nav a:hover,
.sidebar-nav a:focus-visible,
.sidebar-nav a:hover::after,
.sidebar-nav a:focus-visible::after{ color: var(--seal); opacity: 1; }
.sidebar-nav .current,
.sidebar-nav .current-menu-item > a,
.sidebar-nav .current_page_item > a{ color: var(--seal); font-weight: 600; }
.sidebar hr{ border: none; border-top: 1px solid var(--hairline); margin: 32px 0; }
.sidebar h2{ font-size: 0.82rem; font-weight: 600; letter-spacing: 0.3em; color: var(--paper-dim); margin: 0 0 20px; }
.toc-list{ list-style: none; margin: 0; padding: 0; }
.toc-list li a{ display: block; padding: 14px 0; border-bottom: 1px solid var(--hairline); }
.toc-row{ display: flex; justify-content: space-between; font-family: var(--font-num); font-size: 0.82rem; color: var(--paper-dimmer); margin-bottom: 6px; }
.toc-title{ font-size: 0.92rem; line-height: 1.55; color: var(--paper); transition: color .2s ease; }
.toc-list li a:hover .toc-title{ color: var(--seal); }
.sidebar-about{ font-size: 0.92rem; color: var(--paper-dim); max-width: 32ch; margin: 0 0 14px; }
.sidebar-link{ font-size: 0.88rem; border-bottom: 1px solid var(--hairline-strong); transition: color .2s ease, border-color .2s ease; }
.sidebar-link:hover{ color: var(--seal); border-color: var(--seal); }

.screen-reader-text{ position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
a:focus-visible, button:focus-visible, input:focus-visible{ outline: 1px solid var(--seal); outline-offset: 3px; }
@keyframes fadeIn{ from{ opacity:0; } to{ opacity:1; } }
@keyframes rise{ from{ opacity:0; transform: translateY(10px); } to{ opacity:1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce){ .spine, .hero, .entry, .sidebar, .page-header, .article-header, .article-body{ animation: none; } }
@media (max-width: 900px){ .page{ grid-template-columns: 92px minmax(0,1fr); } .sidebar{ display: none; } }
@media (max-width: 760px){
  .page{ grid-template-columns: 1fr; grid-template-areas: "spine" "main" "sidebar"; }
  .spine{ grid-area: spine; position: relative; height: auto; flex-direction: row; padding: 20px 24px; border-right: none; border-bottom: 1px solid var(--hairline); }
  .spine-title{ writing-mode: horizontal-tb; font-size: 1.2rem; letter-spacing: 0.15em; display: flex; align-items: baseline; gap: 14px; }
  .spine-title span{ margin-top: 0; font-size: 0.8rem; letter-spacing: 0.1em; }
  .site-main{ grid-area: main; padding: 0 24px; max-width: none; }
  .entry{ grid-template-columns: 32px 1fr; gap: 8px 16px; padding: 32px 0; }
  .entry-meta{ grid-column: 2; text-align: left; display: flex; align-items: center; gap: 14px; margin-top: 4px; }
  .archive-list li{ grid-template-columns: 1fr; row-gap: 4px; margin-inline: -8px; padding: 10px 8px; }
  .archive-main{ grid-template-columns: 56px minmax(0, 1fr); gap: 12px; row-gap: 4px; }
  .archive-tag{ text-align: left; font-size: 0.72rem; padding-left: 68px; }
  .nav-links{ grid-template-columns: 1fr; }
  .nav-next{ text-align: left; }
  .search-form{ flex-direction: column; }
  .sidebar{ display: block; grid-area: sidebar; border-left: none; border-top: 1px solid var(--hairline); padding: 40px 24px 56px; }
  .sidebar-inner{ position: static; }
}
.comments-area{
  padding: 36px 0 8px;
  border-top: 1px solid var(--hairline);
}
.comment-list{
  list-style: none;
  margin: 0 0 32px;
  padding: 0;
}
.comment-list li{
  padding: 18px 0;
  border-bottom: 1px solid var(--hairline);
}
.comment-meta{
  color: var(--paper-dimmer);
  font-family: var(--font-num);
  font-size: 0.86rem;
  margin-bottom: 8px;
}
.comment-content{ color: var(--paper-dim); }
.comment-reply a,
.cancel-comment-reply a{ color: var(--seal); }
.comment-form label{
  display: block;
  color: var(--paper-dim);
  margin-bottom: 6px;
}
.comment-form input,
.comment-form textarea{
  width: 100%;
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--paper);
  font: inherit;
  padding: 10px 12px;
}
.comment-form button,
.comment-form .submit{
  border: 1px solid var(--hairline-strong);
  background: transparent;
  color: var(--paper);
  font: inherit;
  cursor: pointer;
  padding: 10px 14px;
}
.sidebar-search{
  display: grid;
  gap: 10px;
  padding: 0 0 28px;
}
.sidebar-search .search-submit{
  width: 100%;
}