:root {
  --palette-chip: #e76835;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-reading: "Songti SC", "Noto Serif CJK SC", STSong, Georgia, serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

html[data-palette="fire"] {
  --primary-color: #e76835;
  --secondary-color: #e8e1d7;
  --background-color: #171614;
  --heading-color: #f3ede3;
  --brand-text-color: #9f988e;
  --blockquote-color: #e76835;
  --link-hover-color: #f09a6d;
  --list-color: #a9a196;
  --accent: #e76835;
  --accent-light: rgba(231, 104, 53, .075);
  --accent-border: rgba(231, 104, 53, .34);
  --surface: #1e1c19;
  --surface-raised: #24211d;
  --hairline: #3a3630;
  --quiet: #aaa196;
  --selection: #6d321e;
  --palette-chip: #e76835;
  --coal: #0c0b0a;
  --bone: #eee8dd;
  --ash: #aaa298;
  --ember: #ff7035;
  --fire: #ffc48a;
  --scar: #3f3028;
  --paper: #0c0b0a;
  --ink: #eee8dd;
  --muted: #aaa298;
  --sprout: #ff7035;
  --leaf: #ffc48a;
  --bud: #ff9b5b;
  --soft: #cfb8a5;
  --line: #916449;
  --row-line: #64483a;
  --wash: rgba(255, 112, 53, .06);
  --glow: #29110988;
  --focus-line: #a85e37;
  --veil-wide: linear-gradient(90deg, #0c0b0a4d 0%, #0c0b0a19 38%, transparent 68%), linear-gradient(180deg, #0c0b0a66 0%, transparent 18%, transparent 80%, #0c0b0a7a 100%);
  --veil-mobile: linear-gradient(180deg, #0c0b0a45 0%, transparent 22%, transparent 36%, #0c0b0a4d 68%, #0c0b0a77 100%);
}

html[data-palette="spring"] {
  --primary-color: #557f44;
  --secondary-color: #2b3730;
  --background-color: #f3f5ec;
  --heading-color: #1f2c25;
  --brand-text-color: #6b776f;
  --blockquote-color: #557f44;
  --link-hover-color: #38692e;
  --list-color: #68766d;
  --accent: #557f44;
  --accent-light: rgba(85, 127, 68, .075);
  --accent-border: rgba(85, 127, 68, .34);
  --surface: #f9faf5;
  --surface-raised: #ffffff;
  --hairline: #d2dacd;
  --quiet: #69766d;
  --selection: #cde0bd;
  --palette-chip: #5d9143;
  --coal: #eef1e3;
  --bone: #27392f;
  --ash: #65766b;
  --ember: #5d9143;
  --fire: #7db154;
  --scar: #c4cfb8;
  --paper: #eef1e3;
  --ink: #27392f;
  --muted: #65766b;
  --sprout: #5d9143;
  --leaf: #7db154;
  --bud: #a9c45c;
  --soft: #65766b;
  --line: #98b186;
  --row-line: #c4cfb8;
  --wash: rgba(93, 145, 67, .07);
  --glow: #dcecc6b8;
  --focus-line: #7db154;
  --veil-wide: linear-gradient(90deg, #eef1e38f 0%, #eef1e333 30%, transparent 56%), linear-gradient(180deg, #eef1e399 0%, transparent 18%, transparent 80%, #eef1e3c9 100%);
  --veil-mobile: linear-gradient(180deg, #eef1e3a6 0%, transparent 24%, transparent 44%, #eef1e3a6 72%, #eef1e3d9 100%);
}

.theme-switch-symbol{display:grid;place-items:center;width:20px;height:20px;min-width:0;color:var(--ember);line-height:1}.theme-switch-symbol [data-theme-icon]:not([hidden]){display:flex;align-items:center;justify-content:center;width:100%;height:100%}.theme-switch-symbol svg{display:block;width:100%;height:100%}
@media(max-width:640px){.theme-switch-symbol{width:18px;height:18px}}

html[data-palette="spring"] .stage { background: radial-gradient(ellipse at 64% 62%, var(--glow), #e4edd54d 36%, transparent 68%); }
html[data-palette="fire"] .stage { background: radial-gradient(ellipse at 69% 64%, var(--glow), transparent 68%); }
html[data-palette] .veil { background: var(--veil-wide); }
html[data-palette] .stage:focus-visible { outline-color: var(--focus-line); }
html[data-palette] .preface { color: var(--soft); }
html[data-palette] .entry { border-color: var(--line); }

/* Reading shell: deliberately quiet; cover animation never enters this tree. */
.reading-page {
  color-scheme: dark;
  background: var(--background-color);
}

.reading-page[data-palette="spring"] { color-scheme: light; }

.reading-page body {
  min-height: 100vh;
  margin: 0;
  color: var(--secondary-color);
  background: var(--background-color);
  font-family: var(--font-ui);
  font-size: 1.65em;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.reading-page ::selection { background: var(--selection); }

.reading-page .container {
  width: min(100%, 1080px);
  max-width: 1080px;
  padding-inline: clamp(22px, 4.4vw, 52px);
}

.reading-header { padding-top: clamp(28px, 5vw, 58px); }
.reading-header .u-header { margin: 0; padding: 0; }

.reading-page .bar {
  display: grid;
  grid-template-areas: "nav toggle";
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 28px;
  padding-bottom: 17px;
  border-bottom: 1px solid var(--hairline);
}

.reading-page .bar ul {
  grid-area: nav;
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.8vw, 34px);
  margin: 0;
  padding: 0;
}

.reading-page .bar li { margin: 0; font-size: 1.35rem; }

.reading-page .bar a {
  color: var(--quiet);
  background: none;
  transition: color .16s ease;
}

.reading-page .bar a:hover {
  margin: 0;
  padding: 0;
  color: var(--heading-color);
  background: none;
}

.reading-page .bar a.active {
  color: var(--heading-color);
  border: 0;
}

.reading-page .bar a.active::before {
  content: "/ ";
  color: var(--accent);
  font-family: var(--font-mono);
}

.reading-page .palette-toggle {
  grid-area: toggle;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  width: auto;
  min-height: 44px;
  padding: 0;
  color: var(--bone);
  background: none;
  border: 0;
  border-radius: 0;
  cursor: pointer;
  font: 1.1rem/1 var(--font-mono);
  letter-spacing: .06em;
}

.reading-page .palette-toggle:hover { color: var(--heading-color); background: none; }

.reading-main {
  min-height: calc(100vh - 210px);
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(70px, 10vw, 128px);
}

.reading-main > article:not(.reading-overview),
.reading-main > .terms {
  width: min(100%, 740px);
  margin-inline: auto;
}

.reading-page #brand { margin: 0 0 44px; }
.reading-page #brand h1.brutal-title {
  display: block;
  margin: 0 0 18px;
  padding: 0;
  color: var(--heading-color);
  border: 0;
  font-size: clamp(3.8rem, 6vw, 6.2rem);
  font-weight: 680;
  line-height: 1.08;
  letter-spacing: -.045em;
  text-wrap: balance;
  animation: none;
  text-shadow: none;
}

.reading-page #brand .tagline {
  margin: 0;
  color: var(--quiet);
  font: 1.25rem/1.7 var(--font-mono);
  font-style: normal;
  letter-spacing: .03em;
}

.reading-page .meta-brutal {
  display: flex;
  align-items: center;
  gap: 8px 14px;
  margin: 0;
  padding: 0 0 22px;
  color: var(--quiet);
  border-bottom: 1px solid var(--hairline);
  font: 1.2rem/1.6 var(--font-mono);
}

.reading-page .tag-brutal {
  margin: 0;
  padding: 0;
  color: var(--accent);
  border: 0;
  font: 1.1rem/1.6 var(--font-mono);
  letter-spacing: .05em;
}

.reading-page article:not(.reading-overview) {
  color: var(--secondary-color);
  font-family: var(--font-reading);
  font-size: 1.75rem;
  line-height: 1.9;
  transform: none;
  will-change: auto;
}

.reading-page article:not(.reading-overview) p,
.reading-page article:not(.reading-overview) ul,
.reading-page article:not(.reading-overview) ol,
.reading-page article:not(.reading-overview) blockquote { margin-bottom: 1.65em; }

.reading-page article:not(.reading-overview) { overflow-wrap: anywhere; }
.reading-page article:not(.reading-overview) a { overflow-wrap: anywhere; word-break: break-word; }
.reading-page article:not(.reading-overview) :not(pre) > code { white-space: normal; overflow-wrap: anywhere; word-break: break-word; }

.reading-page article h2,
.reading-page article h3,
.reading-page article h4 {
  color: var(--heading-color);
  font-family: var(--font-ui);
  text-wrap: balance;
}

.reading-page article h2 {
  margin: 2.5em 0 .85em;
  padding: 0 0 10px;
  border: 0;
  border-bottom: 1px solid var(--hairline);
  font-size: 2.6rem;
  font-weight: 650;
  letter-spacing: -.025em;
}

.reading-page article h3 { margin: 2em 0 .7em; font-size: 2.05rem; font-weight: 650; }
.reading-page article h4 { margin: 1.8em 0 .6em; font-size: 1.7rem; font-weight: 650; }

.reading-page article a {
  color: var(--primary-color);
  background: linear-gradient(var(--accent-border), var(--accent-border)) 0 100% / 100% 1px no-repeat;
  text-decoration: none;
}

.reading-page article a:hover { color: var(--link-hover-color); background-size: 100% 2px; }
.reading-page article strong { color: var(--heading-color); background: none; padding: 0; font-weight: 700; }

.reading-page blockquote {
  margin-inline: 0;
  padding: 4px 0 4px 22px;
  color: var(--quiet);
  background: none;
  border: 0;
  border-left: 2px solid var(--accent);
}

.reading-page code {
  color: var(--secondary-color);
  background: var(--surface-raised);
  border: 1px solid var(--hairline);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: .84em;
}

.reading-page pre {
  margin: 2.2em 0;
  padding: 20px 22px;
  color: var(--secondary-color);
  background: var(--surface) !important;
  border: 1px solid var(--hairline);
  border-radius: 0;
  box-shadow: none;
  font-size: 1.35rem;
  line-height: 1.72;
}

.reading-page pre code { border: 0; background: none; }
.reading-page article img { border: 1px solid var(--hairline); box-shadow: none; }
.reading-page hr { margin-block: 3.5em; border-top: 1px solid var(--hairline); }

.reading-page table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 1.45rem;
}
.reading-page th, .reading-page td { padding: 10px 12px; border-bottom: 1px solid var(--hairline); }
.reading-page th { color: var(--heading-color); text-align: left; }

.reading-overview { width: min(100%, 880px); margin-inline: auto; }
.reading-hero { margin-bottom: clamp(52px, 8vw, 82px); }
.reading-kicker {
  margin: 0 0 19px !important;
  color: var(--accent);
  font: 1.1rem/1.5 var(--font-mono);
  letter-spacing: .14em;
}
.reading-hero h1 {
  margin: 0;
  color: var(--heading-color);
  font-size: clamp(5rem, 9vw, 8.4rem);
  font-weight: 650;
  line-height: .98;
  letter-spacing: -.055em;
}
.reading-lede {
  max-width: 580px;
  margin-top: 25px;
  color: var(--quiet);
  font-family: var(--font-reading);
  font-size: 1.7rem;
  line-height: 1.85;
}
.reading-lede p { margin: 0; }

.directory-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 11px;
  color: var(--quiet);
  border-bottom: 1px solid var(--hairline);
  font: 1rem/1.5 var(--font-mono);
  letter-spacing: .12em;
}

.reading-directory { display: grid; }
.directory-row {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) minmax(0, 150px) 20px;
  align-items: center;
  gap: 18px;
  min-height: 76px;
  padding: 15px 4px;
  color: var(--secondary-color);
  background: none;
  border-bottom: 1px solid var(--hairline);
  transition: color .16s ease, background-color .16s ease, padding .16s ease;
}
.archive-overview .directory-row { grid-template-columns: 112px minmax(0, 1fr) 20px; }
.friend-directory .directory-row { grid-template-columns: 52px 42px minmax(0, 1fr) minmax(0, 150px) 20px; }
.friend-avatar {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  overflow: hidden;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid var(--hairline);
}
.friend-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.friend-avatar-fallback { font: 1.25rem/1 var(--font-mono); }
.directory-row:hover { padding-inline: 12px; color: var(--heading-color); background: var(--accent-light); }
.directory-index { color: var(--quiet); font: 1.05rem/1.5 var(--font-mono); }
.directory-section .directory-index { color: var(--accent); }
.directory-copy { display: grid; gap: 3px; min-width: 0; }
.directory-copy strong { overflow-wrap: anywhere; color: inherit; font-size: 1.55rem; font-weight: 600; }
.directory-copy small { overflow-wrap: anywhere; color: var(--quiet); font-size: 1.25rem; line-height: 1.5; }
.directory-meta { color: var(--quiet); font: 1.05rem/1.5 var(--font-mono); text-align: right; }
.directory-arrow { color: var(--accent); font: 1.7rem/1 var(--font-mono); }

.reading-pagination {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 28px;
  color: var(--quiet);
  font: 1.15rem/1.6 var(--font-mono);
}
.reading-pagination a { color: var(--heading-color); }

.about-contact { display: inline-flex; gap: 12px; margin-top: 42px; color: var(--quiet); font: 1.2rem/1.6 var(--font-mono); }
.about-contact:hover { color: var(--accent); }

.reading-page .post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  width: min(100%, 740px);
  margin: 60px auto 0;
}
.reading-page .post-nav a {
  padding: 12px 0;
  color: var(--quiet);
  border: 0;
  border-top: 1px solid var(--hairline);
  font: 1.15rem/1.6 var(--font-mono);
  text-transform: none;
  letter-spacing: 0;
}
.reading-page .post-nav a:hover { color: var(--accent); background: none !important; box-shadow: none; transform: none; }

.reading-page .toc-aside { border: 0; }
.reading-page .toc-title { color: var(--accent); border-color: var(--hairline); font-weight: 600; }
.reading-page .toc-aside #TableOfContents a { color: var(--quiet); }
.reading-page .toc-aside #TableOfContents a:hover,
.reading-page .toc-aside #TableOfContents a.toc-active { color: var(--accent); background: none; }

.reading-page .u-footer {
  margin: 0;
  padding: 26px 0 42px;
  color: var(--quiet);
  border-top: 1px solid var(--hairline);
  font: 1.05rem/1.7 var(--font-mono);
}
.reading-page .u-footer p { margin: 0 !important; }
.reading-page .u-footer a:hover { color: var(--accent); background: none; }

.reading-page .swup-progress-bar { height: 2px; background: var(--accent); }

@media (max-width: 760px) {
  html[data-palette] .veil { background: var(--veil-mobile); }
  .reading-page .container { padding-inline: 21px; }
  .reading-page .bar { grid-template-areas: "nav toggle"; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; }
  .reading-page .bar ul { display: flex; flex-wrap: wrap; gap: 16px; }
  .reading-page .bar li { min-width: 0; font-size: 1.2rem; text-align: center; }
  .reading-page .bar li:first-child { text-align: left; }
  .reading-page .bar li:last-child { text-align: right; }
  .reading-main { padding-top: 52px; padding-bottom: 76px; }
  .reading-page #brand { margin-bottom: 34px; }
  .reading-page #brand h1.brutal-title { font-size: clamp(3.5rem, 12vw, 5rem); }
  .reading-page article:not(.reading-overview) { font-size: 1.65rem; line-height: 1.85; }
  .reading-page article:not(.reading-overview) ul, .reading-page article:not(.reading-overview) ol { padding-left: 1.35em; }
  .reading-page article:not(.reading-overview) ul ul, .reading-page article:not(.reading-overview) ul ol, .reading-page article:not(.reading-overview) ol ul, .reading-page article:not(.reading-overview) ol ol { margin-left: .45em; }
  .reading-page article h2 { font-size: 2.25rem; }
  .reading-hero { margin-bottom: 48px; }
  .reading-hero h1 { font-size: clamp(4.6rem, 18vw, 6.8rem); }
  .directory-row, .archive-overview .directory-row { grid-template-columns: 74px minmax(0, 1fr) 18px; gap: 11px; min-height: 68px; }
  .friend-directory .directory-row { grid-template-columns: 28px 38px minmax(0, 1fr) 18px; }
  .friend-avatar { width: 34px; height: 34px; }
  .directory-meta { display: none; }
  .directory-copy strong { font-size: 1.45rem; }
  .directory-copy small { font-size: 1.15rem; }


  .reading-page .post-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  .reading-page *, .reading-page *::before, .reading-page *::after { transition: none !important; animation: none !important; }
}

.reading-page .reading-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  text-transform: uppercase;
}
.reading-page .reading-breadcrumbs a {
  color: var(--quiet);
  background: none;
  text-decoration: none;
}
.reading-page .reading-breadcrumbs a:hover {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.reading-breadcrumbs a:focus-visible { outline: 1px solid currentColor; outline-offset: 4px; }
.reading-breadcrumbs [aria-hidden] { color: var(--quiet); }

.blog-heading { display: flex; align-items: baseline; flex-wrap: wrap; gap: 12px 22px; }
.reading-page .blog-heading .blog-section-switch {
  color: var(--quiet);
  background: none;
  font: 400 clamp(1.8rem, 3vw, 2.6rem)/1.4 var(--font-ui);
  letter-spacing: -.02em;
  text-decoration: none;
  transition: color .2s ease;
}
.blog-section-switch span { margin-right: 8px; color: var(--hairline); }
.reading-page .blog-heading .blog-section-switch:hover { color: var(--accent); background: none; }
.blog-section-switch:focus-visible { outline: 1px solid var(--accent); outline-offset: 6px; }
@media (prefers-reduced-motion: no-preference) {
  .archive-overview { animation: archive-appear .24s ease-out both; }
}
@keyframes archive-appear { from { opacity: .35; } to { opacity: 1; } }

.directory-kind { margin-left: 8px; color: var(--quiet); font: 1rem/1 var(--font-mono); vertical-align: middle; }

/* Returning to the cover is separate from navigating reading sections. */
.reading-page .bar { grid-template-areas: "home nav toggle"; grid-template-columns: auto 1fr auto; }
.reading-page .bar .home-return {
  grid-area: home;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 24px 8px 0;
  border-right: 1px solid var(--hairline);
  color: var(--heading-color);
  font: 1.2rem/1.4 var(--font-mono);
  white-space: nowrap;
}
.home-return svg { width: 16px; height: 16px; color: var(--accent); transition: transform .18s ease; }
.reading-page .bar .home-return:hover { padding: 8px 24px 8px 0; color: var(--accent); }
.home-return:hover svg { transform: translateX(-3px); }
.home-return:focus-visible { outline: 1px solid var(--accent); outline-offset: 4px; }
@media (max-width: 760px) {
  .reading-page .bar { grid-template-areas: "home toggle" "nav nav"; grid-template-columns: 1fr auto; gap: 14px 16px; }
  .reading-page .bar .home-return, .reading-page .bar .home-return:hover { justify-self: start; border-right: 0; padding: 8px 0; }
  .reading-page .bar ul { gap: 24px; }
}
@media (prefers-reduced-motion: reduce) { .home-return:hover svg { transform: none; } }

.cover-theme-toggle, .reading-page .palette-toggle { min-width: 44px; min-height: 44px; justify-content: center; }