/* tomhalpin.com — shared styles for the homepage, every /writing/ post and /fun-sheets/. */

:root {
  --bg: #FFFFFF;
  --surface: #F6F7F9;
  --ink: #0B0D12;
  --ink-2: #3F4553;
  --ink-3: #5B6270;
  --line: #E4E7EC;
  --line-strong: #D0D5DD;
  --accent: #1F4FE0;
  --accent-hover: #1838B0;

  --font-sans: 'Geist', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --maxw: 1180px;
  --gutter: clamp(20px, 5vw, 48px);
  --section-y: clamp(56px, 8vw, 96px);
  --radius: 12px;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, figure, blockquote { margin: 0; }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

img { max-width: 100%; height: auto; }

.container { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }

.mono { font-family: var(--font-mono); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ---------- Site header & footer ---------- */

.site-header { border-bottom: 1px solid var(--line); }
.site-header__inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 4px 24px; padding-block: 12px;
}
.wordmark {
  display: inline-flex; align-items: center; min-height: 44px;
  font-weight: 600; font-size: 19px; letter-spacing: -0.01em; color: var(--ink);
}
.wordmark:hover { color: var(--ink); }
.site-nav { display: flex; flex-wrap: wrap; gap: 0 4px; margin-left: -12px; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 12px;
  font-size: 16px; color: var(--ink-2);
}
.site-nav a:hover { color: var(--ink); }
.site-nav a.is-cta { color: var(--accent); font-weight: 500; }
.site-nav a.is-cta:hover { color: var(--accent-hover); }

.site-footer { border-top: 1px solid var(--line); }
.site-footer__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding-block: 28px 40px; font-size: 16px; color: var(--ink-3);
}

/* ---------- Buttons & links ---------- */

.btn {
  display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px;
  border-radius: 10px; font-size: 17px; font-weight: 500;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn--primary { background: var(--accent); color: #FFFFFF; }
.btn--primary:hover { background: var(--accent-hover); color: #FFFFFF; }
.btn--secondary { border: 1px solid var(--line-strong); color: var(--ink); }
.btn--secondary:hover { border-color: var(--ink-3); color: var(--ink); }

.text-link { display: inline-flex; align-items: center; min-height: 44px; font-weight: 500; }

/* ---------- Hero ---------- */

.hero {
  display: flex; flex-wrap: wrap; align-items: flex-end; gap: 48px;
  padding-block: clamp(56px, 9vw, 112px) clamp(56px, 8vw, 96px);
}
.hero__main { flex: 1 1 560px; min-width: 0; }
.hero .eyebrow { margin-bottom: 20px; }
.hero h1 {
  font-size: clamp(40px, 5.4vw, 70px); line-height: 1.04; letter-spacing: -0.035em;
  font-weight: 600; max-width: 15ch; margin-bottom: 24px;
}
.hero__lede {
  font-size: clamp(19px, 1.7vw, 22px); line-height: 1.55; color: var(--ink-2);
  max-width: 42ch; margin-bottom: 32px;
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.now-card {
  flex: 1 1 320px; min-width: 0;
  border: 1px solid var(--line); border-radius: 16px; padding: 28px;
}
.now-card .eyebrow { color: var(--ink-3); margin-bottom: 14px; }
.now-card__lead { font-size: 20px; line-height: 1.45; font-weight: 500; margin-bottom: 12px; }
.now-card__lead a { font-weight: 600; }
.now-card__text { font-size: 17px; color: var(--ink-2); margin-bottom: 14px; }
.now-card__meta { font-family: var(--font-mono); font-size: 14px; color: var(--ink-3); }

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

.section { padding-block: var(--section-y); }
.section--band { background: var(--surface); border-block: 1px solid var(--line); }
.section--rule { border-top: 1px solid var(--line); }

.section-head {
  display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between;
  gap: 8px 32px; margin-bottom: 32px;
}
.section-title {
  font-size: clamp(28px, 3vw, 36px); line-height: 1.15; letter-spacing: -0.025em; font-weight: 600;
}
.section-num {
  font-family: var(--font-mono); font-size: 15px; font-weight: 500; letter-spacing: 0;
  color: var(--accent); vertical-align: 0.5em; margin-right: 12px;
}
.section-intro { font-size: 17px; color: var(--ink-2); max-width: 48ch; }

/* About */
.prose { max-width: 68ch; }
.prose p { font-size: 19px; line-height: 1.65; color: var(--ink-2); }
.prose p + p { margin-top: 1.1em; }
.prose strong { color: var(--ink); font-weight: 600; }

/* Track record */
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.stat {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 22px 24px;
}
.stat__value {
  font-size: clamp(32px, 3.4vw, 44px); line-height: 1; font-weight: 600;
  letter-spacing: -0.035em; font-variant-numeric: tabular-nums; margin-bottom: 10px;
}
.stat__value--accent { color: var(--accent); }
.stat__label { font-size: 16px; line-height: 1.45; color: var(--ink-2); }

/* Recent work */
.works { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.work {
  display: flex; flex-direction: column; gap: 12px;
  border-top: 2px solid var(--ink); padding-top: 20px;
}
.work__meta { font-family: var(--font-mono); font-size: 14px; color: var(--ink-3); }
.work__title { font-size: 23px; line-height: 1.25; letter-spacing: -0.02em; font-weight: 600; }
.work__title a { color: var(--ink); }
.work__title a:hover { color: var(--accent); }
.work__blurb { font-size: 17px; color: var(--ink-2); flex-grow: 1; }

/* Experience */
.roles { border-bottom: 1px solid var(--line); }
.role {
  display: flex; flex-wrap: wrap; gap: 4px 32px;
  padding-block: 24px; border-top: 1px solid var(--line);
}
.role__years {
  flex: 0 0 150px; font-family: var(--font-mono); font-size: 15px; color: var(--ink-3); padding-top: 3px;
}
.role__body { flex: 1 1 480px; min-width: 0; }
.role__title { font-size: 20px; font-weight: 600; letter-spacing: -0.01em; }
.role__org { font-weight: 400; color: var(--ink-2); }
.role__note { margin-top: 6px; font-size: 17px; color: var(--ink-2); }

/* Education */
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
}
.card__meta { font-family: var(--font-mono); font-size: 14px; color: var(--ink-3); margin-bottom: 4px; }
.card__title { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.card__title a { color: var(--ink); }
.card__title a:hover { color: var(--accent); }
.card__text { font-size: 17px; color: var(--ink-2); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.contact-card {
  display: flex; flex-direction: column; gap: 2px; padding: 20px 22px;
  border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink);
  transition: border-color .15s ease;
}
.contact-card:hover { border-color: var(--accent); color: var(--ink); }
.contact-card__label { font-family: var(--font-mono); font-size: 14px; color: var(--ink-3); }
.contact-card__value { font-size: 19px; font-weight: 500; }
.contact-card__value--accent { color: var(--accent); }

/* ---------- Write-up pages ---------- */

.post { max-width: 760px; margin: 0 auto; padding: clamp(32px, 6vw, 64px) var(--gutter) clamp(56px, 8vw, 96px); }
.back { display: inline-flex; align-items: center; min-height: 44px; font-size: 16px; color: var(--ink-3); margin-bottom: clamp(16px, 4vw, 32px); }
.back:hover { color: var(--ink); }

.post-header { padding-bottom: 32px; margin-bottom: 40px; border-bottom: 1px solid var(--line); }
.post-header h1 {
  font-size: clamp(34px, 5vw, 52px); line-height: 1.08; letter-spacing: -0.03em; font-weight: 600;
  margin-bottom: 16px;
}
/* Doubled class selectors so these beat the `.post p` body-copy rule below. */
.post-header .eyebrow { font-size: 14px; line-height: 1.6; color: var(--accent); margin: 0 0 16px; }
.post-header .post-meta { font-family: var(--font-mono); font-size: 15px; line-height: 1.6; color: var(--ink-3); margin: 0; }

.post p { font-size: 19px; line-height: 1.7; color: var(--ink-2); margin-bottom: 1.25em; }
.post strong { color: var(--ink); font-weight: 600; }
.post p a { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
.post h2 {
  font-size: clamp(23px, 2.4vw, 27px); line-height: 1.25; letter-spacing: -0.02em; font-weight: 600;
  margin: 2.2em 0 0.8em;
}
.post blockquote {
  margin: 2em 0; padding: 4px 0 4px 24px; border-left: 3px solid var(--accent);
}
.post blockquote p {
  font-size: clamp(21px, 2.2vw, 24px); line-height: 1.45; font-weight: 500; color: var(--ink);
  letter-spacing: -0.01em; margin: 0;
}
.post figure { margin: 2.2em 0; }
.post figure img { display: block; border: 1px solid var(--line); border-radius: 8px; }
.post figure.narrow img { max-width: min(100%, 420px); margin: 0 auto; }
.post figcaption { margin-top: 12px; font-size: 16px; line-height: 1.55; color: var(--ink-3); text-align: center; }

.post-foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line);
  font-size: 16px; color: var(--ink-3);
}

/* ---------- Fun sheets: comic style, scoped to .fs (homepage No. 4 + /fun-sheets/) ---------- */

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
:root {
  --fs-cream: #FFFDF8; --fs-ink: #1D1B33; --fs-yellow: #FFD23F; --fs-purple: #6B2FB3;
  --fs-shadow: 4px 4px 0 #1D1B33;
}
.fs {
  font-family: 'Atkinson Hyperlegible', var(--font-sans);
  color: var(--fs-ink);
  background-color: var(--fs-cream);
  background-image: radial-gradient(rgba(29, 27, 51, 0.13) 1.3px, transparent 1.5px);
  background-size: 22px 22px;
}
.fs :focus-visible { outline: 3px solid var(--fs-purple); outline-offset: 3px; }
.fs-display { font-family: 'Bungee', var(--font-sans); font-weight: 400; letter-spacing: 0.01em; }

.fs-btn {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px; padding: 0 16px;
  border: 3px solid var(--fs-ink); border-radius: 10px; background: #FFFFFF;
  font: 700 16px/1.2 'Atkinson Hyperlegible', var(--font-sans); color: var(--fs-ink);
  box-shadow: 3px 3px 0 var(--fs-ink); transition: transform .12s ease, box-shadow .12s ease;
}
.fs-btn:hover { color: var(--fs-ink); transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--fs-ink); }
.fs-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--fs-ink); }
.fs-btn--primary { background: var(--fs-yellow); }

/* Homepage: No. 4 spans the whole Recent work row, with the newest sheets fanned out. */
.fs-feature {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 28px; align-items: center;
  border: 3px solid var(--fs-ink); border-radius: 18px; box-shadow: var(--fs-shadow);
  padding: clamp(22px, 3.4vw, 36px);
}
.fs-feature__meta { font-size: 15px; font-weight: 700; color: var(--fs-purple); margin-bottom: 10px; }
.fs-feature__title { font-size: clamp(25px, 3vw, 34px); line-height: 1.15; margin-bottom: 14px; }
.fs-feature__title a { color: var(--fs-ink); }
.fs-feature__title a:hover { color: var(--fs-purple); }
.fs-feature__title mark { background: var(--fs-yellow); color: var(--fs-ink); padding: 0 6px; border-radius: 4px; }
.fs-feature__blurb { font-size: 18px; line-height: 1.6; color: var(--fs-ink); margin-bottom: 22px; }

.fs-fan { display: flex; justify-content: center; align-items: flex-end; padding: 18px 12px 12px; }
.fs-fan__sheet {
  position: relative; flex: 0 1 31%; max-width: 190px; margin-left: -9%;
  border: 3px solid var(--fs-ink); border-radius: 6px; background: #FFFFFF; box-shadow: var(--fs-shadow);
  transform: rotate(var(--r, 0deg)) translateY(var(--y, 0px)); transition: transform .18s ease, box-shadow .18s ease;
}
.fs-fan__sheet:first-child { margin-left: 0; }
.fs-fan__sheet:nth-child(1) { --r: -9deg; --y: 12px; }
.fs-fan__sheet:nth-child(2) { --r: -3deg; --y: 0px; }
.fs-fan__sheet:nth-child(3) { --r: 3deg; --y: 0px; }
.fs-fan__sheet:nth-child(4) { --r: 9deg; --y: 12px; }
.fs-fan__sheet:hover, .fs-fan__sheet:focus-visible { z-index: 5; transform: rotate(0deg) translateY(-12px); box-shadow: 6px 6px 0 var(--fs-ink); }
.fs-fan__img { display: block; width: 100%; height: auto; aspect-ratio: 600 / 777; border-radius: 3px; }

/* /fun-sheets/: the library, styled as a fridge door full of printouts. */
.fs-library { border-top: 3px solid var(--fs-ink); border-bottom: 3px solid var(--fs-ink); padding-block: clamp(48px, 7vw, 80px); }
.fs-library__head { max-width: 760px; margin-bottom: 28px; }
.fs-library__title { font-size: clamp(30px, 4.4vw, 44px); line-height: 1.1; margin-bottom: 10px; }
.fs-library__title mark { background: var(--fs-yellow); color: var(--fs-ink); padding: 0 8px; border-radius: 6px; }
.fs-library__intro { font-size: 19px; line-height: 1.6; }

.fs-chips { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 12px; }
.fs-chip {
  min-height: 44px; padding: 0 18px; border: 3px solid var(--fs-ink); border-radius: 999px; background: #FFFFFF;
  font: 700 16px/1 'Atkinson Hyperlegible', var(--font-sans); color: var(--fs-ink); cursor: pointer;
  box-shadow: 3px 3px 0 var(--fs-ink);
}
.fs-chip:hover { background: var(--fs-yellow); }
.fs-chip[aria-pressed="true"] { background: var(--fs-purple); color: #FFFFFF; }
.fs-status { font-size: 16px; color: #4A4766; margin-bottom: 36px; }

.fs-grid {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); gap: 48px 32px; align-items: start;
}
.fs-card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  background: #FFFFFF; border: 3px solid var(--fs-ink); border-radius: 16px; box-shadow: var(--fs-shadow);
  padding: 22px 16px 18px; transform: rotate(var(--tilt, 0deg)); transition: transform .18s ease, box-shadow .18s ease;
  scroll-margin-top: 24px;
}
.fs-card[hidden] { display: none; }
.fs-card:nth-child(4n+1) { --tilt: -1.4deg; }
.fs-card:nth-child(4n+2) { --tilt: 1deg; }
.fs-card:nth-child(4n+3) { --tilt: -0.6deg; }
.fs-card:nth-child(4n) { --tilt: 1.3deg; }
.fs-card:hover, .fs-card:focus-within { transform: rotate(0deg) translateY(-4px); box-shadow: 7px 7px 0 var(--fs-ink); }
.fs-magnet {
  position: absolute; top: -17px; left: 50%; width: 30px; height: 30px; margin-left: -15px; border-radius: 50%;
  background: var(--fs-yellow); border: 3px solid var(--fs-ink); box-shadow: 2px 2px 0 var(--fs-ink);
}
.fs-card:nth-child(3n+2) .fs-magnet { background: var(--fs-purple); }
.fs-card:nth-child(3n) .fs-magnet { background: #FF7A59; }
.fs-card__thumb { border: 2px solid var(--fs-ink); border-radius: 8px; overflow: hidden; background: var(--fs-cream); }
.fs-card__img { display: block; width: 100%; height: auto; aspect-ratio: 600 / 777; }
.fs-thumb-missing {
  display: grid; place-items: center; width: 100%; aspect-ratio: 600 / 777;
  border: 2px dashed #8E8AA8; border-radius: 6px; font-weight: 700; color: #4A4766; text-align: center; padding: 16px;
}
.fs-card__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 15px; font-weight: 700; color: #4A4766; margin-top: 4px; }
.fs-tag { padding: 3px 10px; border: 2px solid var(--fs-ink); border-radius: 999px; background: var(--fs-yellow); color: var(--fs-ink); }
.fs-tag--physics { background: var(--fs-purple); color: #FFFFFF; }
.fs-tag--biology { background: var(--fs-ink); color: var(--fs-yellow); }
.fs-tag--chemistry { background: #FFFFFF; color: var(--fs-purple); }
.fs-card__title { font-size: 21px; line-height: 1.2; }
.fs-card__summary { font-size: 17px; line-height: 1.5; }
.fs-card__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.fs-card__soon { font-weight: 700; color: #4A4766; }
.fs-card__more { border-top: 2px dashed #CFCBE0; padding-top: 10px; font-size: 16px; line-height: 1.5; }
.fs-card__more summary { min-height: 32px; display: flex; align-items: center; cursor: pointer; font-weight: 700; color: var(--fs-purple); }
.fs-card__more summary::-webkit-details-marker { color: var(--fs-purple); }
.fs-card__pages { font-weight: 700; margin: 6px 0; }
.fs-card__more ul { padding-left: 20px; display: grid; gap: 4px; }
.fs-library__note { margin-top: 56px; font-size: 18px; line-height: 1.6; }
.fs-library__note a { color: var(--fs-purple); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.post .fs-jump { margin: 0 0 40px; }
.post--tail { padding-top: 0; }

/* ---------- Narrower screens ---------- */

@media (max-width: 900px) {
  .works { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .fs-feature { grid-template-columns: minmax(0, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .cards { grid-template-columns: minmax(0, 1fr); }
  .role__years { flex-basis: 100%; }
}

@media (max-width: 480px) {
  body { font-size: 17px; }
  .site-nav { gap: 0; margin-left: -8px; }
  .site-nav a { padding: 0 8px; font-size: 15px; }
  .stat { padding: 18px 16px 20px; }
  .stat__label { font-size: 15px; }
  .now-card { padding: 22px; }
  .post p, .prose p { font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}