/* ==========================================================================
   sghowell.github.io — stylesheet
   Berkeley Mono, monochrome, zero dependencies, zero JS.
   ========================================================================== */

@font-face {
  font-family: "Berkeley Mono";
  src: url("/fonts/BerkeleyMonoVariable.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBMPlexSans-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBMPlexSans-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/fonts/IBMPlexSans-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

:root {
  --font: "Berkeley Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --font-prose: "IBM Plex Sans", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;

  --bg: #fafafa;
  --fg: #111111;
  --muted: #666666;
  --faint: #999999;
  --rule: #111111;
  --subtle: #e5e5e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e0e;
    --fg: #ededed;
    --muted: #8a8a8a;
    --faint: #5f5f5f;
    --rule: #ededed;
    --subtle: #1f1f1f;
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 78ch;
  margin: 0 auto;
  padding: 48px 32px 96px;
}

@media (max-width: 640px) {
  .container { padding: 32px 20px 64px; }
}

/* ----- Masthead ----- */

.masthead { margin-bottom: 32px; }

.masthead h1 {
  margin: 0 0 4px;
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.masthead .tagline {
  color: var(--muted);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  margin: 0 0 2px;
}

.masthead .location {
  color: var(--muted);
  font-size: 0.75rem;
  margin: 0 0 16px;
}

.anchor-rail {
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin: 0 0 8px;
}

.anchor-rail a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.anchor-rail a:hover,
.anchor-rail a:focus-visible {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

.anchor-rail .sep {
  margin: 0 6px;
  color: var(--faint);
}

.masthead .resume-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.75rem;
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--fg);
  padding-bottom: 1px;
}

.masthead .resume-link:hover,
.masthead .resume-link:focus-visible {
  border-bottom-width: 2px;
}

/* ----- Sections ----- */

section {
  border-top: 1px solid var(--rule);
  padding-top: 14px;
  margin-top: 28px;
}

section:first-of-type { margin-top: 0; }

section > h2 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
}

section > h2::before { content: "// "; color: var(--faint); }

/* ----- About ----- */

.about p {
  margin: 0 0 12px;
  max-width: 72ch;
}

.about .edu {
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 16px;
}

/* ----- Entries (experience, projects, pubs) ----- */

.entry {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--subtle);
}

.entry:last-of-type { border-bottom: 0; }

.entry .lhs {
  color: var(--muted);
  font-size: 0.75rem;
  padding-top: 1px;
  letter-spacing: 0.02em;
}

.entry .rhs .title {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--fg);
}

.entry .rhs .sub {
  color: var(--muted);
  font-size: 0.75rem;
  margin-top: 2px;
}

.entry .rhs ul {
  margin: 8px 0 0;
  padding-left: 16px;
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.entry .rhs ul li { margin-bottom: 4px; }

.entry .rhs .desc {
  color: var(--muted);
  font-size: 0.8125rem;
  margin-top: 4px;
  line-height: 1.55;
}

@media (max-width: 640px) {
  .entry { grid-template-columns: 1fr; gap: 6px; }
  .entry .lhs { font-size: 0.6875rem; }
}

/* ----- Projects group headings ----- */

.project-group {
  color: var(--faint);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 22px 0 4px;
}

.project-group:first-child { margin-top: 0; }

.project .lhs .lang {
  display: inline-block;
  font-size: 0.6875rem;
  color: var(--muted);
}

.project .lhs .visibility {
  display: inline-block;
  font-size: 0.6875rem;
  color: var(--faint);
  margin-left: 6px;
}

.entry .title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--faint);
  padding-bottom: 1px;
}

.entry .title a:hover,
.entry .title a:focus-visible {
  border-bottom-color: var(--fg);
}

/* ----- Prior positions dense list ----- */

.prior {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--subtle);
  list-style: none;
  padding-left: 0;
}

.prior li {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 6px 0;
  font-size: 0.8125rem;
  color: var(--muted);
}

.prior li .lhs { color: var(--muted); font-size: 0.75rem; }

.prior li .rhs .title { color: var(--fg); font-weight: 700; }

@media (max-width: 640px) {
  .prior li { grid-template-columns: 1fr; gap: 2px; padding: 8px 0; }
}

/* ----- Publications ----- */

.pubs li {
  padding: 10px 0;
  font-size: 0.8125rem;
  color: var(--muted);
  border-bottom: 1px solid var(--subtle);
  line-height: 1.55;
}

.pubs li:last-child { border-bottom: 0; }

.pubs em { color: var(--fg); font-style: normal; }

.pubs ol { list-style: decimal; padding-left: 20px; margin: 0; }

/* ----- Contact ----- */

.contact-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contact-list a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  text-decoration: none;
  font-size: 0.875rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  width: fit-content;
}

.contact-list a:hover,
.contact-list a:focus-visible {
  border-bottom-color: var(--fg);
}

.icon {
  width: 16px;
  height: 16px;
  display: inline-block;
  flex-shrink: 0;
  color: currentColor;
}

/* ----- Focus styles ----- */

:focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; }

a { color: var(--fg); }

/* ----- Footer ----- */

.site-footer {
  margin-top: 48px;
  padding-top: 14px;
  border-top: 1px solid var(--subtle);
  color: var(--faint);
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Essay pages (/writing/*.html)
   Scoped under body.essay so nothing leaks into the one-pager.
   ========================================================================== */

.essay .top-strip {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.essay .top-strip .brand {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg);
  text-decoration: none;
}

.essay .top-strip .brand .sep {
  color: var(--faint);
  margin: 0 6px;
  font-weight: 400;
}

.essay .top-strip .back {
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  white-space: nowrap;
}

.essay .top-strip .back:hover,
.essay .top-strip .back:focus-visible {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

.essay .essay-header {
  margin-bottom: 40px;
}

.essay .essay-header .eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 14px;
}

.essay .essay-header .eyebrow::before {
  content: "// ";
  color: var(--faint);
}

.essay .essay-header h1 {
  margin: 0 0 14px;
  font-family: var(--font);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.25;
  max-width: 32ch;
  text-transform: none;
}

.essay .essay-header .dek {
  margin: 0 0 14px;
  max-width: 64ch;
  font-family: var(--font-prose);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--muted);
}

.essay .essay-header .date {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--faint);
}

.essay .article {
  max-width: 64ch;
  font-family: var(--font-prose);
  font-size: 1.0625rem;
  line-height: 1.72;
  color: var(--fg);
}

.essay .article p {
  margin: 0 0 1.15em;
}

.essay .article h2 {
  margin: 2.2em 0 0.9em;
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.essay .article h2::before {
  content: "// ";
  color: var(--faint);
}

.essay .article em {
  font-style: italic;
}

.essay .article a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--subtle);
  padding-bottom: 1px;
}

.essay .article a:hover,
.essay .article a:focus-visible {
  border-bottom-color: var(--fg);
}

.essay .article .pullquote {
  margin: 1.8em 0;
  padding: 0.3em 0 0.3em 1.25em;
  border-left: 2px solid var(--fg);
}

.essay .article .pullquote p {
  margin: 0;
  font-style: italic;
  font-size: 1.125em;
  line-height: 1.55;
  color: var(--fg);
}

.essay .article sup.note {
  font-family: var(--font);
  font-size: 0.68em;
  vertical-align: super;
  line-height: 0;
  margin-left: 0.1em;
  white-space: nowrap;
}

.essay .article sup.note a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: none;
  font-weight: 700;
}

.essay .article sup.note a:hover,
.essay .article sup.note a:focus-visible {
  color: var(--fg);
}

.essay .sources {
  margin-top: 48px;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  max-width: 64ch;
}

.essay .sources h2 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
}

.essay .sources h2::before {
  content: "// ";
  color: var(--faint);
}

.essay .sources ol {
  list-style: decimal;
  padding-left: 20px;
  margin: 0;
}

.essay .sources li {
  padding: 10px 0;
  font-family: var(--font-prose);
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
  border-bottom: 1px solid var(--subtle);
}

.essay .sources li:last-child {
  border-bottom: 0;
}

.essay .sources li a {
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--subtle);
  padding-bottom: 1px;
}

.essay .sources li a:hover,
.essay .sources li a:focus-visible {
  border-bottom-color: var(--fg);
}

.essay .bottom-strip {
  margin-top: 40px;
  padding-top: 14px;
  border-top: 1px solid var(--subtle);
}

.essay .bottom-strip .back {
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}

.essay .bottom-strip .back:hover,
.essay .bottom-strip .back:focus-visible {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

@media (max-width: 640px) {
  .essay .top-strip { flex-wrap: wrap; gap: 8px; }
  .essay .essay-header h1 { font-size: 1.25rem; }
  .essay .article { font-size: 1rem; line-height: 1.68; }
}