/* Trace Layers — a portfolio drawn like an evolving architecture set */
:root {
  --paper: #f4f1e8;
  --graphite: #232622;
  --blue: #173fda;
  --orange: #ff4d12;
  --mint: #c9f4dc;
  --line: rgba(35, 38, 34, .24);
  --soft-line: rgba(35, 38, 34, .11);
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--graphite);
  background-color: var(--paper);
  background-image: linear-gradient(var(--soft-line) 1px, transparent 1px), linear-gradient(90deg, var(--soft-line) 1px, transparent 1px);
  background-size: 32px 32px;
  font-family: var(--sans);
  line-height: 1.45;
}
a { color: inherit; text-underline-offset: .2em; }
a:hover { color: var(--orange); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
button { font: inherit; }
.skip-link { position: fixed; left: 1rem; top: 1rem; z-index: 20; padding: .7rem 1rem; background: var(--graphite); color: white; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.masthead { min-height: 92vh; position: relative; padding: clamp(1.25rem, 4vw, 4rem); border-bottom: 2px solid var(--graphite); overflow: hidden; }
.masthead::after { content: "00"; position: absolute; right: -1vw; bottom: -13vw; z-index: -1; color: rgba(23, 63, 218, .08); font-size: clamp(15rem, 42vw, 38rem); font-weight: 800; line-height: 1; letter-spacing: -.12em; }
.sheet-kicker, .index, .layer-label, .portrait-note { font: 700 .68rem/1.2 var(--mono); letter-spacing: .13em; text-transform: uppercase; }
.sheet-kicker { margin: 0 0 clamp(3rem, 9vh, 7rem); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(250px, .55fr); align-items: end; gap: clamp(2rem, 8vw, 9rem); max-width: 1500px; margin: auto; }
.hero-copy h1 { max-width: 10ch; margin: .1em 0; font-size: clamp(4rem, 11vw, 10.5rem); line-height: .78; letter-spacing: -.075em; font-weight: 700; }
.hero-copy .index { color: var(--blue); }
.role { max-width: 32ch; margin: 2rem 0; color: var(--blue); font-size: clamp(1.15rem, 2.2vw, 2rem); font-weight: 600; line-height: 1.1; }
.summary { max-width: 700px; columns: 2; column-gap: 3rem; font-size: clamp(1rem, 1.25vw, 1.18rem); }
.summary p { margin: 0 0 1.1em; break-inside: avoid; }
.contact { display: flex; flex-wrap: wrap; gap: .7rem 2rem; margin-top: 2rem; font-family: var(--mono); font-size: .8rem; }
.portrait-wrap { position: relative; margin: 0; padding: 1rem 1rem 2.5rem; background: rgba(201, 244, 220, .73); border: 1px solid var(--graphite); transform: rotate(1.5deg); box-shadow: 15px 15px 0 rgba(23, 63, 218, .11); }
.portrait { display: block; width: 100%; aspect-ratio: 4 / 5; object-fit: cover; filter: grayscale(100%) contrast(1.08); mix-blend-mode: multiply; }
.portrait-note { display: block; margin-bottom: .75rem; }
.registration span, .cross { position: absolute; width: 22px; height: 22px; }
.registration span::before, .registration span::after, .cross::before, .cross::after { content: ""; position: absolute; background: var(--orange); }
.registration span::before, .cross::before { width: 100%; height: 1px; top: 50%; }
.registration span::after, .cross::after { width: 1px; height: 100%; left: 50%; }
.registration span:first-child { top: 2rem; right: 2rem; }
.registration span:last-child { bottom: 2rem; left: 2rem; }

.layer-console { position: sticky; top: 0; z-index: 10; display: grid; grid-template-columns: 1fr auto auto; align-items: center; gap: 2rem; padding: 1rem clamp(1.25rem, 4vw, 4rem); background: rgba(244, 241, 232, .91); border-bottom: 1px solid var(--graphite); backdrop-filter: blur(13px); }
.layer-console h2 { margin: .1rem 0; font-size: 1.1rem; }
.layer-console .index { margin: 0; color: var(--blue); }
.layer-buttons { display: flex; }
.layer-toggle, .flatten { border: 1px solid var(--graphite); background: transparent; color: var(--graphite); cursor: pointer; }
.layer-toggle { min-width: 8.3rem; padding: .75rem; border-right: 0; text-align: left; font-size: .75rem; }
.layer-toggle:last-child { border-right: 1px solid; }
.layer-toggle b { margin-right: .55rem; color: var(--blue); font-family: var(--mono); }
.layer-toggle.is-on { background: var(--graphite); color: white; }
.layer-toggle.is-on b { color: var(--mint); }
.flatten { padding: .75rem 1rem; font: 700 .68rem var(--mono); text-transform: uppercase; letter-spacing: .06em; }
.flatten[aria-pressed="true"] { background: var(--orange); }

.work, .credentials, .references { padding: clamp(5rem, 10vw, 10rem) clamp(1.25rem, 4vw, 4rem); }
.section-title { display: grid; grid-template-columns: minmax(180px, 1fr) 2fr 1fr; gap: 2rem; align-items: baseline; max-width: 1500px; margin: 0 auto 5rem; border-top: 2px solid; padding-top: 1rem; }
.section-title h2 { margin: 0; color: var(--blue); font-size: clamp(2.5rem, 6vw, 6rem); line-height: .9; letter-spacing: -.055em; }
.section-title > p:last-child { max-width: 24ch; }
.sheet-stack { max-width: 1500px; margin: auto; }
.project-sheet { position: relative; display: grid; grid-template-columns: 1fr 1.3fr; margin: 0 0 clamp(5rem, 10vw, 10rem); border: 1px solid var(--graphite); background: rgba(255, 255, 255, .5); box-shadow: 13px 13px 0 rgba(23, 63, 218, .1); }
.project-sheet::before { content: ""; position: absolute; inset: 9px; pointer-events: none; border: 1px solid var(--soft-line); }
.project-head { grid-column: 1 / -1; display: grid; grid-template-columns: .25fr 1.5fr .5fr; gap: 1.5rem; padding: clamp(1.5rem, 4vw, 4rem); border-bottom: 1px solid var(--line); }
.project-head h3 { margin: .2rem 0; max-width: 17ch; font-size: clamp(2.2rem, 5vw, 5.5rem); letter-spacing: -.055em; line-height: .88; }
.sheet-number { margin: 0; color: var(--orange); font: 700 clamp(1.2rem, 2vw, 2rem) var(--mono); }
.company { margin: 1rem 0 0; color: var(--blue); font-size: 1.2rem; font-weight: 700; }
.dates { justify-self: end; font-family: var(--mono); }
.layer-label { color: var(--blue); }
.system-layer, .work-layer { padding: clamp(1.5rem, 4vw, 4rem); }
.system-layer { background: rgba(201, 244, 220, .52); border-right: 1px solid var(--line); }
.tech-list { display: flex; flex-wrap: wrap; gap: .55rem; padding: 0; margin: 2rem 0 0; list-style: none; }
.tech-list li { padding: .45rem .65rem; border: 1px solid var(--graphite); font: .72rem var(--mono); background: rgba(244, 241, 232, .75); }
.work-notes { margin: 2rem 0 0; padding: 0; list-style: none; }
.work-notes li { display: grid; grid-template-columns: 2rem 1fr; gap: 1rem; padding: 1rem 0; border-top: 1px solid var(--line); }
.work-notes span { color: var(--orange); font: 700 .7rem var(--mono); }
.work-notes p { margin: 0; max-width: 65ch; }
.detail-layer { grid-column: 1 / -1; display: flex; justify-content: space-between; gap: 1rem; padding: .75rem 1.5rem; border-top: 1px solid; font: .65rem var(--mono); letter-spacing: .08em; }
.cross-a { left: -11px; top: 40%; }.cross-b { right: -11px; bottom: 16%; }
.cross::before, .cross::after { background: var(--blue); }
.layer.is-hidden { display: none; }
body.is-flat .project-sheet { display: block; box-shadow: none; margin-bottom: 2rem; }
body.is-flat .project-head { padding: 1.5rem; }
body.is-flat .project-head h3 { font-size: clamp(1.7rem, 3vw, 3rem); }
body.is-flat .system-layer, body.is-flat .work-layer { padding: 1.5rem; border-right: 0; }

.credentials { background: var(--graphite); color: var(--paper); }
.credentials .section-title h2 { color: var(--mint); }
.credential-layout { display: grid; grid-template-columns: 1fr 1fr 1.3fr; max-width: 1500px; margin: auto; border: 1px solid rgba(244,241,232,.4); }
.credential-column, .skills-column { padding: clamp(1.5rem, 4vw, 4rem); border-right: 1px solid rgba(244,241,232,.4); }
.skills-column { border: 0; background: var(--mint); color: var(--graphite); }
.credential-layout h3 { margin: 0 0 3rem; color: var(--orange); font: 700 .7rem var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.credential-column article { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid rgba(244,241,232,.25); }
.credential-column p { margin: .3rem 0; }
.institution { font-size: 1.25rem; font-weight: 700; }
.skills-column ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; margin: 0; padding: 0; list-style: none; }
.skills-column li { display: flex; gap: .75rem; padding: .75rem 0; border-top: 1px solid rgba(35,38,34,.25); }
.skills-column li span { color: var(--blue); font: .7rem var(--mono); }
.reference-strip { display: grid; grid-template-columns: repeat(4, 1fr); max-width: 1500px; margin: auto; border-top: 1px solid; border-left: 1px solid; }
.reference-strip figure { display: flex; flex-direction: column; justify-content: space-between; margin: 0; min-height: 24rem; padding: 2rem; border-right: 1px solid; border-bottom: 1px solid; background: rgba(255,255,255,.42); }
.reference-strip figure:nth-child(even) { transform: translateY(2rem); background: rgba(201,244,220,.45); }
.reference-strip blockquote { margin: 0; font-size: clamp(1rem, 1.4vw, 1.3rem); }
.reference-strip figcaption { display: flex; flex-direction: column; margin-top: 3rem; font-size: .8rem; }
.reference-strip figcaption span { color: var(--blue); }
.site-footer { display: grid; grid-template-columns: 1fr 2fr 1fr; gap: 2rem; align-items: end; min-height: 35vh; padding: clamp(2rem, 4vw, 4rem); background: var(--blue); color: white; }
.site-footer p { margin: 0; }.site-footer a { justify-self: end; color: var(--mint); font-weight: 700; }

@media (max-width: 900px) {
  .hero-grid, .section-title, .credential-layout { grid-template-columns: 1fr; }
  .portrait-wrap { max-width: 420px; }
  .layer-console { position: relative; grid-template-columns: 1fr; gap: 1rem; }
  .layer-buttons { display: grid; grid-template-columns: 1fr 1fr; }
  .layer-toggle, .layer-toggle:last-child { border: 1px solid var(--graphite); }
  .project-sheet { grid-template-columns: 1fr; }
  .project-head { grid-template-columns: auto 1fr; }
  .project-head .dates { grid-column: 2; justify-self: start; }
  .system-layer { border-right: 0; border-bottom: 1px solid var(--line); }
  .reference-strip { grid-template-columns: 1fr 1fr; }
  .credential-column, .skills-column { border-right: 0; border-bottom: 1px solid rgba(244,241,232,.4); }
}
@media (max-width: 560px) {
  .summary { columns: 1; }
  .hero-copy h1 { font-size: clamp(3.7rem, 19vw, 6rem); }
  .project-head { display: block; }
  .dates { margin-top: 1.5rem; }
  .reference-strip { grid-template-columns: 1fr; }
  .reference-strip figure:nth-child(even) { transform: none; }
  .skills-column ol { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; }.site-footer a { justify-self: start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}