:root {
  --bg: #fcfcf9;
  --surface: #ffffff;
  --text: #171717;
  --muted: #5f5f5f;
  --line: #e8e8e3;
  --line-strong: #d9d9d2;
  --link: #111111;
  --max-width: 760px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Manrope", sans-serif;
  line-height: 1.7;
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-shell {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 2.5rem;
}

.brand,
.eyebrow,
.post-meta,
.button-link,
.filter-chip {
  font-family: "IBM Plex Mono", monospace;
}

.brand {
  font-size: 0.95rem;
  font-weight: 500;
}

.site-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-nav a {
  color: var(--muted);
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
}

.stack {
  display: grid;
  gap: 3rem;
}

.intro {
  display: grid;
  gap: 1rem;
  justify-content: start;
}

.intro-copy {
  display: grid;
  gap: 1rem;
  justify-items: start;
  max-width: 40rem;
}

.content-section {
  display: grid;
  gap: 1rem;
}

.post-layout {
  display: grid;
  gap: 2rem;
}

.post-body {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.eyebrow,
.post-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  font-weight: 700;
}

h1 {
  font-size: clamp(2.1rem, 5vw, 3rem);
}

h2 {
  font-size: clamp(1.3rem, 3vw, 1.7rem);
}

h3 {
  font-size: 1.06rem;
}

p,
li {
  margin: 0;
  color: var(--muted);
}

.lead {
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.75;
  width: 100%;
  max-width: none;
  text-align: left;
}

.intro-body {
  color: var(--muted);
  width: 100%;
  max-width: none;
  line-height: 1.75;
  text-align: left;
}

.link-row,
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.link-row a {
  color: var(--text);
}

.underlined-link {
  text-decoration: underline;
  text-underline-offset: 0.14em;
}

.link-row:empty {
  display: none;
}

.simple-list {
  margin: 0;
  padding-left: 1.15rem;
}

.simple-list li + li {
  margin-top: 0.45rem;
}

.post-list {
  display: grid;
  gap: 1.5rem;
}

.post-item,
.resume-entry {
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.post-item h2 a,
.post-item h3 a {
  text-decoration: underline;
  text-underline-offset: 0.14em;
}

.post-item h2,
.post-item h3 {
  margin-bottom: 0.4rem;
}

.section-header,
.entry-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.entry-subtitle {
  color: var(--text);
  font-weight: 600;
}

.skill-entry {
  gap: 0.35rem;
}

.section-link,
.button-link {
  color: var(--muted);
  font-size: 0.82rem;
}

.button-link {
  display: inline-flex;
  width: fit-content;
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.button-link:hover {
  color: var(--text);
  text-decoration: underline;
}

.filter-chip {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.filter-chip.is-active,
.filter-chip:hover {
  color: var(--text);
  text-decoration: underline;
}

.post-preview.is-hidden {
  display: none;
}

.site-footer {
  padding-top: 3rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.post-toc-shell {
  align-self: start;
}

.post-toc {
  display: grid;
  gap: 0.75rem;
  padding: 0;
}

.post-toc-label {
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.post-toc-list,
.post-toc-sublist {
  list-style: none;
  margin: 0;
  padding-left: 0;
}

.post-toc-list {
  display: grid;
  gap: 0.55rem;
}

.post-toc-sublist {
  margin-top: 0.4rem;
  margin-left: 0.85rem;
  padding-left: 0.85rem;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 0.35rem;
}

.post-toc-group:not(.is-expanded) .post-toc-sublist {
  display: none;
}

.post-toc a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.45;
}

.post-toc a:hover {
  color: var(--text);
  text-decoration: underline;
}

.post-toc a.is-active,
.post-toc a[aria-current="location"] {
  color: var(--text);
  font-weight: 700;
}

.post-body .part-heading {
  margin-top: 2rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--line-strong);
  scroll-margin-top: 1.5rem;
}

.post-body .post-subheading {
  margin-top: 1.4rem;
  color: var(--text);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.35;
  scroll-margin-top: 1.5rem;
}

.post-figure {
  display: grid;
  gap: 0.8rem;
  margin: 0;
}

.post-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1rem;
}

.post-figure figcaption {
  width: 100%;
  padding-left: 0.1rem;
  color: var(--muted);
  font-size: 0.88rem;
  font-style: italic;
  line-height: 1.55;
  text-align: center;
}

.post-body pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
}

.post-body code {
  font-family: inherit;
}

.post-visual {
  display: grid;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 248, 243, 0.96));
}

.post-visual-title,
.visual-page-name,
.visual-sequence-index {
  margin: 0;
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
}

.post-visual-title {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.visual-mono-card,
.visual-sequence-row,
.visual-page-card {
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  background: var(--surface);
}

.visual-mono-card {
  padding: 1rem 1.1rem;
}

.visual-mono-text,
.visual-sequence-text {
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
}

.visual-token-row {
  display: grid;
  gap: 0.65rem;
}

.visual-token-row {
  gap: 0.75rem;
}

.visual-token-chips,
.visual-page-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.visual-token-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem 0.7rem;
  border-radius: 999px;
  background: #f2f2ec;
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.88rem;
}

.visual-sequence {
  display: grid;
  gap: 0.7rem;
}

.visual-sequence-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: start;
  padding: 0.9rem 1rem;
}

.visual-sequence-index {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.7;
}

.visual-page-grid {
  gap: 0.75rem;
}

.visual-page-card {
  display: grid;
  gap: 0.25rem;
  min-width: 10rem;
  padding: 0.85rem 0.95rem;
}

.visual-page-name {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.visual-page-owner {
  color: var(--muted);
  font-size: 0.95rem;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  animation: rise 380ms ease forwards;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .site-header {
    flex-wrap: wrap;
    padding-bottom: 2rem;
  }

  .post-layout {
    grid-template-columns: 1fr;
  }

  .post-toc-shell {
    order: -1;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.75rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .section-header,
  .entry-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 900px) {
  .site-shell {
    width: min(calc(100% - 2rem), 1100px);
  }

  .post-layout {
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: start;
  }

  .post-body {
    grid-column: 1;
    grid-row: 1;
  }

  .post-toc-shell {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 2rem;
  }
}

@media print {
  .site-header,
  .site-footer {
    display: none;
  }

  .site-shell {
    width: 100%;
    padding: 0;
  }

  body {
    background: #ffffff;
  }
}