/* Erin Lee — portfolio styles
   Built from the Claude Design handoff (v1 "Modern Product / Systems" direction). */

:root {
  --paper: #FBFBFC;
  --band: #F6F7F9;
  --chip: #EEF0F3;
  --line: #E4E6EA;
  --line-strong: #D8DBE0;
  --ink: #0E1116;
  --text-strong: #1E242B;
  --text: #3A424B;
  --text-muted: #4C555F;
  --text-meta: #77808A;
  --accent: oklch(.58 .13 42);
  --accent-hover: oklch(.55 .13 42);
  --accent-deep: oklch(.35 .07 42);
  --accent-light: oklch(.78 .1 60);

  --serif: 'Instrument Serif', serif;
  --sans: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  /* Layout: backgrounds run edge to edge; content sits in a centred
     column no wider than --max. --edge is the extra space either side
     of that column on very wide screens; --pad is the full side padding. */
  --max: 1600px;
  --gutter: 72px;
  --edge: max(0px, calc((100vw - var(--max)) / 2));
  --pad: calc(var(--gutter) + var(--edge));
  --shadow: 0 1px 2px rgba(14,17,22,.04), 0 16px 40px -16px rgba(14,17,22,.14);
  --radius: 8px;        /* homepage screenshot + chip radius */
  --radius-cs: 32px;    /* case study media radius */
}

* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent-hover); }
img, video { display: block; max-width: 100%; }

.mono-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-meta);
}

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(251,251,252,.88);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.nav__inner {
  padding: 20px var(--pad);
  display: flex; justify-content: space-between; align-items: center; gap: 24px;
}
.nav__brand { font-size: 14px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; white-space: nowrap; }
.nav__links { display: flex; gap: 32px; font-size: 14px; color: var(--text-muted); }
.nav__links a { white-space: nowrap; }

/* ---------- Page frame ---------- */
.frame {
  width: 100%;
}

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0,1fr) calc(372px + var(--edge));
  position: relative; overflow: hidden;
}
.hero shader-gradient { z-index: 0; }
.hero__field { top: 0; bottom: 0; left: 0; right: calc(372px + var(--edge)); z-index: 0;
  /* keep the network away from the headline: it fades in toward the right */
  -webkit-mask-image: linear-gradient(90deg, transparent 25%, #000 65%); mask-image: linear-gradient(90deg, transparent 25%, #000 65%); }
@media (max-width: 1100px) { .hero__field { right: 0; opacity: .6; } }
.hero__main {
  position: relative; z-index: 1;
  padding: 128px var(--pad) 104px;
  display: flex; flex-direction: column; gap: 36px;
}
.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-muted);
}
.eyebrow__dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }
.hero h1 {
  margin: 0; font-family: var(--serif); font-weight: 400;
  font-size: 86px; line-height: 1.02; letter-spacing: -.02em;
  max-width: 15ch; text-wrap: pretty;
}
.hero h1 em { font-style: italic; }
.hero__lede {
  margin: 0; font-size: 20px; line-height: 1.6; color: var(--text);
  max-width: 56ch; text-wrap: pretty;
}
.pills { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 8px; }
.pill {
  font-family: var(--mono); font-size: 12px; letter-spacing: .04em;
  border: 1px solid var(--line-strong); padding: 8px 13px; color: var(--text);
  border-radius: var(--radius);
}

.rail {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  background: var(--band); border-left: 1px solid var(--line);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.rail__block { padding: 28px calc(32px + var(--edge)) 28px 32px; display: flex; flex-direction: column; gap: 6px; }
.rail__block--jobs { gap: 14px; }
.rail__block--grow { gap: 8px; flex: 1; }
.rail__label { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-meta); }
.rail__job { display: flex; flex-direction: column; gap: 2px; }
.rail__co { font-size: 17px; font-weight: 500; }
.rail__role { font-size: 14px; color: var(--text-muted); }
.rail__list { font-size: 15px; line-height: 1.75; color: var(--text); }
.rail__cta {
  padding: 22px calc(32px + var(--edge)) 22px 32px; display: flex; justify-content: space-between; align-items: center;
  font-size: 15px; font-weight: 500; background: var(--ink); color: var(--paper);
  transition: background .2s;
}
.rail__cta:hover { background: var(--accent-deep); color: var(--paper); }

/* ---------- Selected work ---------- */
.section-bar {
  padding: 32px var(--pad) 0;
  display: flex; justify-content: space-between;
}

.project { display: block; background: var(--paper); transition: background .2s; }
.project:hover { background: var(--band); color: inherit; }
.project__text { padding: 56px var(--pad) 48px; display: flex; flex-direction: column; gap: 22px; }
.project__title { display: flex; align-items: baseline; gap: 16px; }
.project__num { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.project__name { margin: 0; font-weight: 400; font-family: var(--serif); font-size: 40px; letter-spacing: -.01em; line-height: 1.1; }
.project__pitch { margin: 0; font-size: 20px; line-height: 1.5; color: var(--text-strong); max-width: 40ch; text-wrap: pretty; }
.project__pitch--wide { max-width: 42ch; }
.tags { display: flex; gap: 9px; flex-wrap: wrap; }
.tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase;
  background: var(--chip); padding: 6px 10px; color: var(--text-muted);
  border-radius: var(--radius);
}

.story { margin-top: 14px; display: flex; flex-direction: column; gap: 16px; max-width: 60ch; }
.story__row { display: grid; grid-template-columns: 108px 1fr; gap: 20px; align-items: start; }
.story__label {
  font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); padding-top: 3px;
}
.story__body { font-size: 15px; line-height: 1.6; color: var(--text); text-wrap: pretty; }
.story__body--strong { color: var(--text-strong); }
.story__body em { font-style: italic; color: var(--text-strong); }
.story__body strong { font-weight: 600; }

.story-grid {
  margin-top: 14px; display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 40px; max-width: 1200px;
}
.story-grid__cell { display: flex; flex-direction: column; gap: 7px; }
.story-grid__cell .story__body { line-height: 1.55; }

.project__band { background: var(--band); padding: 56px var(--pad) 64px; }
.project__band img, .project__band video {
  width: 100%; height: auto;
  background: #FFFFFF; box-shadow: var(--shadow);
  border-radius: var(--radius); overflow: hidden;
}

/* ---------- About ---------- */
.about { display: grid; grid-template-columns: minmax(0,1fr) calc(560px + var(--edge)); align-items: start; }
.about__main {
  padding: 96px var(--gutter) 96px var(--pad); display: flex; flex-direction: column; gap: 30px;
}
.about h2 {
  margin: 0; font-family: var(--serif); font-weight: 400;
  font-size: 54px; line-height: 1.06; letter-spacing: -.02em; max-width: 18ch; text-wrap: pretty;
}
.about__body { margin: 0; font-size: 18px; line-height: 1.65; color: var(--text); max-width: 58ch; text-wrap: pretty; }
.buttons { display: flex; gap: 12px; margin-top: 10px; flex-wrap: wrap; }
.btn { font-size: 15px; font-weight: 500; padding: 13px 22px; transition: background .2s, border-color .2s; }
.btn--solid { background: var(--ink); color: var(--paper); }
.btn--solid:hover { background: var(--accent-deep); color: var(--paper); }
.btn--ghost { border: 1px solid var(--line-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink); color: var(--ink); }

.timeline { display: flex; flex-direction: column; gap: 28px; padding: 104px var(--pad) 96px 0; }
.timeline__head {
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-meta);
  display: flex; justify-content: space-between;
}
.timeline__row {
  display: grid; grid-template-columns: 1fr auto; gap: 6px 20px;
}
.timeline__co { font-size: 17px; font-weight: 500; }
.timeline__years { font-family: var(--mono); font-size: 13px; color: var(--text-meta); }
.timeline__role { font-size: 14px; color: var(--text-muted); }

/* ---------- Contact / footer ---------- */
.contact {
  background: var(--ink); color: var(--paper);
  padding: 88px var(--pad);
  display: flex; justify-content: space-between; align-items: flex-end; gap: 60px; flex-wrap: wrap;
}
.contact__main { display: flex; flex-direction: column; gap: 18px; }
.contact__label { color: rgba(251,251,252,.5); }
.contact__title { font-family: var(--serif); font-size: 52px; line-height: 1.05; letter-spacing: -.02em; }
.contact__email {
  font-size: 20px; color: var(--accent-light);
  border-bottom: 1px solid rgba(251,251,252,.3); align-self: flex-start; padding-bottom: 3px;
}
.contact__email:hover { color: var(--paper); }
.contact__side { display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: rgba(251,251,252,.5); text-align: right; }
.contact__side a { color: rgba(251,251,252,.8); }

.footer { background: var(--ink); color: var(--paper); }
.footer__inner {
  padding: 40px var(--pad);
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 14px; color: rgba(251,251,252,.55);
}
.footer__inner a { color: rgba(251,251,252,.8); }

/* ---------- Case study ---------- */
.cs-hero { padding: 104px var(--pad) 56px; display: flex; flex-direction: column; gap: 30px; }
.cs-eyebrow {
  display: flex; align-items: center; gap: 14px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em; text-transform: uppercase; color: var(--text-muted);
}
.cs-eyebrow__num { color: var(--accent); }
.cs-eyebrow__rule { width: 18px; height: 1px; background: var(--line-strong); }
.cs-hero h1 {
  margin: 0; font-family: var(--serif); font-weight: 400;
  font-size: 86px; line-height: 1.02; letter-spacing: -.02em; max-width: 16ch; text-wrap: pretty;
}
.cs-hero__lede { margin: 0; font-size: 21px; line-height: 1.55; color: var(--text-strong); max-width: 62ch; text-wrap: pretty; }

.meta { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 8px var(--pad) 48px; }
.meta__cell { display: flex; flex-direction: column; gap: 6px; }
.meta__label { font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-meta); }
.meta__value { font-size: 15px; }

.media {
  width: 100%; height: auto;
  border-radius: var(--radius-cs); background: #FFFFFF; box-shadow: var(--shadow);
}
.cs-cover { background: var(--band); padding: 56px var(--pad); }
.media--embed { display: block; aspect-ratio: 3 / 2; border: 0; overflow: hidden; }
/* a live embed shown as a window floating on the shared gradient backdrop */
.media-frame {
  aspect-ratio: 3 / 2; overflow: hidden; display: grid; place-items: center;
  background: #E6E3F4 url(../images/embed-bg.jpg) center / cover no-repeat;
}
.media-frame iframe {
  /* full size, then scaled down: the embed keeps its desktop layout inside the smaller window */
  width: 100%; height: 100%; transform: scale(.8); border: 0; display: block; background: #FFFFFF; border-radius: 18px;
  box-shadow: 0 32px 75px -22px rgba(40,30,80,.38);
}
.media--embed.media--portrait { aspect-ratio: 4 / 5; }
.media--embed.media--43 { aspect-ratio: 4 / 3; }
.cs-media { padding: 0 var(--pad) 56px; }
.cs-media--tight { padding-bottom: 48px; }
.cs-media--stack { padding-bottom: 24px; display: flex; flex-direction: column; gap: 24px; }
.cs-media--pair { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.cs-section {
  padding: 64px var(--pad) 48px;
  display: grid; grid-template-columns: 200px minmax(0,1fr); gap: 48px; align-items: start;
}
.cs-section--flush { padding-top: 0; }
.cs-section--impact { background: var(--band); padding-bottom: 64px; }
.cs-section--impact-gap { margin-top: 32px; }
.cs-section--last { padding-bottom: 56px; }
.cs-label {
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); padding-top: 8px;
}
.cs-label--muted { color: var(--text-meta); }
.cs-copy { display: flex; flex-direction: column; gap: 22px; max-width: 68ch; }
.cs-copy p, p.cs-copy { margin: 0; font-size: 18px; line-height: 1.7; color: var(--text); text-wrap: pretty; }
.cs-copy em { font-style: italic; color: var(--text-strong); }
.cs-copy a { color: var(--text-strong); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 3px; }
.cs-copy a:hover { color: var(--accent-hover); }
.cs-copy .pullquote {
  font-family: var(--serif); font-size: 30px; line-height: 1.35; color: var(--ink);
  max-width: 24ch; padding-top: 8px;
}
.cs-copy ul { margin: 0; padding-left: 1.15em; display: flex; flex-direction: column; gap: 14px; }
.cs-copy li { font-size: 18px; line-height: 1.7; color: var(--text); text-wrap: pretty; padding-left: 4px; }
.cs-copy li::marker { color: var(--text-meta); }
.cs-copy strong { font-weight: 600; color: var(--text-strong); }
.cs-copy .cs-question { font-family: var(--serif); font-size: 28px; line-height: 1.35; color: var(--ink); max-width: 34ch; }
/* Tradeoffs: one card per explored direction, pros and cons side by side */
.cs-copy .tradeoffs { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--line); }
.tradeoff { padding: 18px 0; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; }
.tradeoff__name { font-weight: 600; color: var(--text-strong); font-size: 18px; display: flex; align-items: center; gap: 10px; }
.tradeoff__tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); border: 1px solid currentColor; border-radius: 999px; padding: 2px 8px; font-weight: 400; }
.tradeoff__row { display: grid; grid-template-columns: 56px minmax(0,1fr); gap: 12px; align-items: baseline; }
.tradeoff__k { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-meta); }
.cs-copy .tradeoff__row p { font-size: 17px; line-height: 1.6; }
.cs-impact-quote, .cs-copy .cs-impact-quote {
  margin: 0; font-family: var(--serif); font-size: 34px; line-height: 1.3; color: var(--ink);
  max-width: 22ch; text-wrap: pretty;
}
.cs-impact-quote--wide { max-width: 24ch; }

.cs-split { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); }
.cs-split__col { padding: 48px 48px 48px var(--pad); display: flex; flex-direction: column; gap: 18px; }
.cs-split__col:last-child { padding: 48px var(--pad) 48px 48px; }
.cs-split__title { font-family: var(--serif); font-size: 30px; letter-spacing: -.01em; }
.cs-split__col p { margin: 0; font-size: 17px; line-height: 1.65; color: var(--text); text-wrap: pretty; }
.cs-split__col .media { margin-top: auto; } /* media sits on the bottom edge, so paired columns line up */
/* one animation beside its text: the text sits centred against the media */
.cs-split--feature .cs-split__col:first-child { justify-content: center; max-width: 52ch; }

.next {
  display: flex; justify-content: space-between; align-items: baseline; gap: 24px;
  padding: 56px var(--pad); transition: background .2s;
}
.next:hover { background: var(--band); color: inherit; }
.next__label { font-family: var(--mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-meta); white-space: nowrap; }
.next__title { font-family: var(--serif); font-size: 40px; letter-spacing: -.01em; text-align: right; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  :root { --gutter: 48px; }
  .hero { grid-template-columns: 1fr; }
  .hero__main { padding-top: 96px; padding-bottom: 80px; }
  .rail__block--grow { flex: none; }
  .rail__block, .rail__cta { padding-left: var(--pad); padding-right: var(--pad); }
  .about { grid-template-columns: 1fr; }
  .about__main { padding-bottom: 0; }
  .timeline { padding: 56px var(--pad) 96px; }
  .story-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root { --gutter: 20px; --radius-cs: 16px; }
  html { scroll-padding-top: 60px; }
  .nav__inner { padding-top: 16px; padding-bottom: 16px; }
  .nav__links { gap: 16px; font-size: 13px; }
  .nav__resume { display: none; }

  .hero__main { padding-top: 64px; padding-bottom: 56px; gap: 28px; }
  .hero h1 { font-size: clamp(44px, 12vw, 86px); }
  .hero__lede { font-size: 17px; }

  .project__text { padding-top: 40px; padding-bottom: 36px; gap: 18px; }
  .project__name { font-size: 30px; }
  .project__pitch { font-size: 18px; }
  .story__row { grid-template-columns: 1fr; gap: 6px; }
  .project__band { padding: 24px var(--pad) 32px; }

  .about__main { padding-top: 64px; }
  .timeline { padding-top: 48px; padding-bottom: 64px; }
  .about h2 { font-size: 38px; }
  .about__body { font-size: 17px; }

  .contact { padding-top: 64px; padding-bottom: 64px; gap: 36px; }
  .contact__title { font-size: 36px; }
  .contact__email { font-size: 18px; }
  .contact__side { text-align: left; }

  .cs-hero { padding-top: 64px; padding-bottom: 40px; gap: 22px; }
  .cs-hero h1 { font-size: clamp(44px, 12vw, 86px); }
  .cs-hero__lede { font-size: 18px; }
  .meta { grid-template-columns: 1fr 1fr; gap: 20px; padding-bottom: 36px; }
  .cs-cover { padding: 24px var(--pad); }
  .media-frame { aspect-ratio: 4 / 5; }
  .media-frame iframe { width: 90%; height: 92%; transform: none; border-radius: 10px; }
  .cs-media { padding-bottom: 40px; }
  .cs-media--pair { grid-template-columns: 1fr; }
  .cs-section { grid-template-columns: 1fr; gap: 16px; padding-top: 48px; padding-bottom: 36px; }
  .cs-section--flush { padding-top: 0; }
  .cs-label { padding-top: 0; }
  .cs-copy p, p.cs-copy, .cs-copy li { font-size: 17px; }
  .cs-copy .cs-question { font-size: 24px; }
  .cs-copy .pullquote { font-size: 26px; }
  .cs-impact-quote, .cs-copy .cs-impact-quote { font-size: 28px; }
  .cs-split { grid-template-columns: 1fr; }
  .cs-split__col, .cs-split__col:last-child { padding: 40px var(--pad); }
  .next { flex-direction: column; align-items: flex-start; gap: 10px; padding-top: 40px; padding-bottom: 40px; }
  .next__title { font-size: 30px; text-align: left; }
}