:root {
  color-scheme: light dark;
  --bg: #f2f2f2;
  --surface: #fafafa;
  --surface-soft: #e8e8e8;
  --text: #0f0f0f;
  --muted: #525252;
  --line: #cccccc;
  --accent: #d44000;
  --accent-strong: #a33000;
  --code-bg: #e0e0e0;
  --shadow: 0 20px 60px rgba(15, 15, 15, 0.1);
  --syn-bg: #e0e0e0;
  --syn-text: #0f0f0f;
  --syn-comment: #888888;
  --syn-muted: #525252;
  --syn-keyword: #a33000;
  --syn-number: #d44000;
  --syn-decorator: #d44000;
  --syn-string: #2e6e4e;
  --syn-escape: #1a5438;
  --syn-function: #0f0f0f;
  --syn-builtin: #525252;
  --syn-class-name: #0f0f0f;
  --syn-self: #888888;
}

:root[data-theme="dark"] {
  --bg: #0f0f0f;
  --surface: #1a1a1a;
  --surface-soft: #242424;
  --text: #f0f0f0;
  --muted: #a0a0a0;
  --line: #333333;
  --accent: #e85500;
  --accent-strong: #ff6a1a;
  --code-bg: #212121;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  --syn-bg: #212121;
  --syn-text: #e8e8e8;
  --syn-comment: #5a5a5a;
  --syn-muted: #808080;
  --syn-keyword: #ff6a1a;
  --syn-number: #e85500;
  --syn-decorator: #e85500;
  --syn-string: #4caf7d;
  --syn-escape: #2e8f5e;
  --syn-function: #e8e8e8;
  --syn-builtin: #a0a0a0;
  --syn-class-name: #e8e8e8;
  --syn-self: #5a5a5a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Mono", "Cascadia Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 16px;
  line-height: 1.65;
}

a {
  border-radius: 4px;
  color: var(--accent);
  text-decoration: none;
  transition: color 160ms ease;
}

a:hover,
a:focus-visible {
  color: var(--accent-strong);
}

img {
  display: block;
  max-width: 100%;
}

.site-header {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: center;
  min-height: 74px;
  padding: 0 clamp(20px, 5vw, 72px);
  position: relative;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: 22px;
  justify-content: space-between;
  padding: 0 30px;
  width: min(580px, 64vw);
}

.site-nav a {
  align-items: center;
  display: inline-flex;
  font: inherit;
  font-size: 1.08rem;
  min-height: 42px;
  padding: 2px 0;
  text-decoration: none;
}

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

.site-nav a.active {
  color: var(--accent);
  font-weight: 700;
}

.theme-toggle {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 999px;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-size: 0.98rem;
  height: 34px;
  justify-content: center;
  opacity: 0.78;
  padding: 0;
  position: absolute;
  right: clamp(18px, 5vw, 72px);
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
}

.theme-toggle:hover {
  color: var(--accent);
  opacity: 1;
}

.theme-toggle svg {
  height: 18px;
  stroke: currentColor;
  width: 18px;
}

main {
  margin: 0 auto;
  max-width: 1180px;
  padding: clamp(32px, 5vw, 72px) clamp(20px, 5vw, 72px) 88px;
}

.home-hero {
  align-items: center;
  display: grid;
  gap: clamp(32px, 6vw, 84px);
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  min-height: calc(100vh - 210px);
}

.hero-copy h1,
.page-intro h1,
.article-head h1 {
  font-family: inherit;
  font-size: clamp(3rem, 8vw, 6.8rem);
  font-weight: 650;
  line-height: 0.96;
  margin: 8px 0 28px;
}

.page-intro h1,
.article-head h1 {
  max-width: 980px;
}

.intro-text {
  color: var(--muted);
  max-width: 720px;
}

.intro-text p:first-child {
  color: var(--text);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}

.portrait-frame {
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: var(--shadow);
  margin: 0;
  overflow: hidden;
}

.portrait-frame img {
  aspect-ratio: 1;
  background: var(--surface-soft);
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  margin: 0 0 10px;
  text-transform: uppercase;
}

.section-grid {
  border-top: 1px solid var(--line);
  display: grid;
  gap: clamp(28px, 5vw, 72px);
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
  padding-top: clamp(36px, 6vw, 72px);
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.15;
  margin: 0 0 18px;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline li {
  border-left: 2px solid var(--accent);
  margin: 0 0 18px;
  padding: 0 0 0 18px;
}

.prose p {
  margin-top: 0;
}

.soft-link {
  color: var(--accent);
}

.page-intro,
.article-head {
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-intro h1 {
  margin-bottom: 0;
}

.list-stack {
  display: grid;
  gap: 0;
}

.list-card {
  align-items: start;
  background: transparent;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
  min-height: 0;
  padding: 24px 0;
}

.list-card:last-child {
  border-bottom: 1px solid var(--line);
}

.list-card h2 {
  margin-bottom: 8px;
}

.list-card h2 a {
  color: var(--text);
  text-decoration: none;
}

.list-card h2 a:hover,
.list-card h2 a:focus-visible {
  color: var(--text);
}

.list-card p:not(.eyebrow) {
  color: var(--muted);
  margin: 0 0 14px;
}

.blog-card {
  align-items: center;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 180px);
}

.post-thumb {
  aspect-ratio: 16 / 10;
  display: block;
  justify-self: end;
  max-width: 180px;
  order: 2;
  overflow: hidden;
  text-decoration: none;
  width: 100%;
}

.blog-card > div {
  order: 1;
}

.post-thumb img {
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.project-card {
  grid-template-columns: minmax(0, 1fr);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chips span {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.2;
  padding: 5px 9px;
}

.back-link {
  color: var(--muted);
  display: inline-flex;
  margin-bottom: 28px;
  text-decoration: none;
}

.site-footer {
  margin: 72px auto 36px;
  max-width: 1180px;
  padding: 0 clamp(20px, 5vw, 72px);
}

.social-links {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: center;
}

.social-link {
  align-items: center;
  background: transparent;
  color: var(--muted);
  display: inline-flex;
  justify-content: center;
  padding: 0;
}

.social-link:hover,
.social-link:focus-visible {
  color: var(--accent);
}

.social-link svg {
  display: block;
  height: 18px;
  width: 18px;
}

.social-link-placeholder {
  opacity: 0.7;
}

.article-meta {
  color: var(--muted);
  margin: -14px 0 18px;
}

.article-body {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(22px, 5vw, 58px);
}

.article-body > *:first-child {
  margin-top: 0;
}

.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5 {
  margin-top: 2em;
}

.article-body p,
.article-body ul {
  max-width: 76ch;
}

.article-figure {
  margin: 28px 0;
}

.article-figure img {
  border: 1px solid var(--line);
  border-radius: 8px;
  max-height: 720px;
  object-fit: contain;
  width: 100%;
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 22px 0;
  max-width: 100%;
  overflow-x: auto;
  padding: 16px;
}

.code-block-python {
  background: var(--syn-bg);
}

.code-block-python code {
  color: var(--syn-text);
  display: block;
}

.syn-comment {
  color: var(--syn-comment);
  font-style: italic;
}

.syn-muted {
  color: var(--syn-muted);
}

.syn-keyword {
  color: var(--syn-keyword);
  font-weight: 700;
}

.syn-number {
  color: var(--syn-number);
}

.syn-decorator {
  color: var(--syn-decorator);
}

.syn-string {
  color: var(--syn-string);
}

.syn-escape {
  color: var(--syn-escape);
}

.syn-function {
  color: var(--syn-function);
  font-weight: 700;
}

.syn-builtin {
  color: var(--syn-builtin);
}

.syn-class-name {
  color: var(--syn-class-name);
  font-weight: 700;
}

.syn-self {
  color: var(--syn-self);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

p code,
li code {
  background: var(--code-bg);
  border-radius: 5px;
  padding: 0.08em 0.34em;
}

.cell-output {
  color: var(--muted);
  white-space: pre-wrap;
}

@media (max-width: 820px) {
  .site-header {
    align-items: center;
  }

  .site-nav {
    gap: 10px;
    overflow-x: auto;
    padding: 0 8px;
    width: min(320px, calc(100vw - 96px));
  }

  .home-hero,
  .section-grid,
  .list-card,
  .blog-card,
  .project-card {
    grid-template-columns: 1fr;
  }

  .home-hero {
    min-height: auto;
  }

  .portrait-frame {
    justify-self: center;
    max-width: 360px;
    order: -1;
  }

  .post-thumb,
  .blog-card > div {
    order: initial;
  }

  .post-thumb {
    justify-self: stretch;
    max-width: none;
  }

}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .site-header {
    gap: 10px;
    min-height: 66px;
  }

  .theme-toggle {
    height: 34px;
    right: 14px;
    width: 34px;
  }

  .site-nav {
    gap: 8px;
    padding: 0;
  }

  .site-nav a {
    font-size: 0.92rem;
    min-height: 42px;
  }

  .hero-copy h1,
  .page-intro h1,
  .article-head h1 {
    font-size: 3rem;
  }

  .article-body {
    margin-left: -4px;
    margin-right: -4px;
  }
}