:root {
  color-scheme: light;
  --background: #fff;
  --text: #171717;
  --muted: #6f6f6f;
  --soft: #a4a4a4;
  --line: #ededed;
  --line-strong: #858585;
  --sidebar: 256px;
  --content: 800px;
  --font: "Helvetica Neue", Helvetica, Arial, sans-serif;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --background: #111111;
  --text: #f1f1f1;
  --muted: #a3a3a3;
  --soft: #777;
  --line: #292929;
  --line-strong: #777;
}

* { box-sizing: border-box; }
html { text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.page { display: flex; min-height: 100vh; flex-direction: column; }
.layout {
  display: grid;
  flex: 1;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  width: min(calc(100% - 48px), calc(var(--sidebar) + var(--content)));
  margin: 0 auto;
}
.sidebar { padding: 52px 32px 48px 0; }
.logo { display: inline-flex; width: 116px; margin-bottom: 42px; }
.logo img { display: block; width: 100%; height: auto; max-height: 132px; object-fit: contain; object-position: left center; transition: filter .2s ease, opacity .2s ease; }
.logo:hover img { opacity: .72; }
:root[data-theme="dark"] .logo img { filter: invert(1); }
.nav { display: grid; gap: 14px; }
.nav a { color: var(--muted); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); }
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: max-content;
  margin-top: 30px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--text); }
.theme-icon { position: relative; width: 14px; height: 14px; }
.theme-icon::before { content: "◐"; position: absolute; inset: -3px 0 0; font-size: 16px; line-height: 1; }
:root[data-theme="dark"] .theme-icon::before { content: "◑"; }
.main { min-width: 0; padding: 43px 0 88px; }
.page-title { margin: 0 0 56px; font-size: 36px; font-weight: 400; line-height: 1.2; letter-spacing: -.035em; }
.section {
  display: grid;
  grid-template-columns: 158px minmax(0, 1fr);
  gap: 24px;
  margin-bottom: 44px;
}
.section-label {
  margin: 0;
  padding-top: 25px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .03em;
  text-transform: uppercase;
}
.post-list { border-top: 1px solid var(--line-strong); }
.post-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}
.post-row:hover .post-title { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.post-title { min-width: 0; line-height: 1.45; }
.post-date { color: var(--muted); font-size: 13px; white-space: nowrap; }
.empty { color: var(--muted); }
.article { max-width: 720px; }
.article-header { margin-bottom: 38px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.article-title { margin: 0 0 16px; font-size: clamp(2rem, 5vw, 2.75rem); font-weight: 400; line-height: 1.13; letter-spacing: -.035em; }
.article-meta { color: var(--muted); font-size: 14px; }
.article-summary { margin: 18px 0 0; color: var(--muted); font-size: 17px; line-height: 1.6; }
.today-song { margin: -10px 0 34px; }
.today-song-label { margin-bottom: 8px; color: var(--muted); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.today-song iframe { display: block; height: 80px; border: 0; border-radius: 10px; background: var(--line); }
.sidebar-toc { margin-top: 46px; }
.sidebar-toc-label { margin-bottom: 10px; color: var(--soft); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.sidebar-toc-list { margin: 0; padding: 10px 0 0; border-top: 1px solid var(--line); list-style: none; }
.sidebar-toc-list li { margin: 0; }
.sidebar-toc-list a { display: block; padding: 5px 0; color: var(--muted); font-size: 13px; line-height: 1.4; }
.sidebar-toc-list a:hover { color: var(--text); }
.toc-level-3 a { padding-left: 16px; }
.toc-level-4 a { padding-left: 32px; }
.prose { font-size: 17px; line-height: 1.72; }
.prose h2 { margin: 44px 0 14px; font-size: 25px; font-weight: 500; line-height: 1.25; }
.prose h3 { margin: 34px 0 12px; font-size: 20px; font-weight: 500; }
.prose p, .prose ul, .prose ol, .prose blockquote { margin: 0 0 20px; }
.prose ul, .prose ol { padding-left: 25px; }
.prose blockquote { padding-left: 18px; border-left: 2px solid #d8d8d8; color: var(--muted); font-style: italic; }
.prose a { text-decoration: underline; text-decoration-color: #bdbdbd; text-underline-offset: 3px; }
.prose img { display: block; max-width: 100%; height: auto; margin: 30px 0; border-radius: 18px; box-shadow: 0 1px 2px color-mix(in srgb, var(--text) 8%, transparent), 0 10px 30px color-mix(in srgb, var(--text) 7%, transparent); }
.prose .post-image { margin: 30px 0; }
.prose .post-image-small { width: min(100%, 360px); }
.prose .post-image-medium { width: min(100%, 540px); }
.prose .post-image-large { width: 100%; }
.prose .post-image img { width: 100%; margin: 0; }
.prose .post-image figcaption { margin-top: 9px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.prose code { padding: 2px 5px; border-radius: 3px; background: color-mix(in srgb, var(--text) 7%, var(--background)); font-size: .88em; }
.prose pre { overflow-x: auto; margin: 26px 0; padding: 18px; border: 1px solid var(--line); border-radius: 4px; background: color-mix(in srgb, var(--text) 5%, var(--background)); }
.prose pre code { padding: 0; background: none; }
.prose hr { margin: 40px 0; border: 0; border-top: 1px solid var(--line); }
.back-link { display: inline-block; margin-top: 48px; color: var(--muted); font-size: 14px; }
.back-link:hover { color: var(--text); }
.footer {
  display: flex;
  justify-content: space-between;
  width: min(calc(100% - 48px), calc(var(--sidebar) + var(--content)));
  margin: 0 auto;
  padding: 28px 0 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}
.footer-links { display: flex; gap: 20px; }
.footer a:hover { color: var(--text); }
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; width: min(calc(100% - 32px), var(--content)); }
  .sidebar { padding: 28px 0 0; }
  .logo { width: 88px; margin-bottom: 22px; }
  .nav { grid-auto-flow: column; justify-content: start; gap: 22px; }
  .theme-toggle { margin-top: 20px; }
  .main { padding: 38px 0 64px; }
  .page-title { margin-bottom: 42px; font-size: 33px; }
  .section { grid-template-columns: 1fr; gap: 12px; margin-bottom: 38px; }
  .section-label { padding-top: 14px; }
  .post-row { gap: 16px; }
  .sidebar-toc { max-width: 320px; margin-top: 28px; }
  .footer { width: min(calc(100% - 32px), var(--content)); }
}
@media (max-width: 460px) {
  .post-row { grid-template-columns: 1fr; gap: 4px; }
  .post-date { font-size: 12px; }
  .prose img { border-radius: 14px; }
  .footer { align-items: flex-start; gap: 20px; }
}