:root {
  --project-bg: #071010;
  --project-panel: rgba(11, 27, 27, .86);
  --project-panel-strong: #0c2020;
  --project-line: rgba(85, 226, 187, .22);
  --project-line-strong: rgba(85, 226, 187, .6);
  --project-text: #effff8;
  --project-muted: #9bb6ad;
  --project-teal: #55e2bb;
  --project-green: #b5f36b;
  --project-shadow: 0 22px 70px rgba(0, 0, 0, .32);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--project-bg) url("../assets/backgrounds/hero-background.svg") center top / cover fixed;
  color: var(--project-text);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  line-height: 1.6;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(5, 17, 17, .82), rgba(4, 11, 12, .96));
  z-index: -1;
}
a { color: inherit; }
button, input { font: inherit; }
button { cursor: pointer; }
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: .65rem 1rem;
  transform: translateY(-160%);
  background: var(--project-green);
  color: #06100d;
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 2px solid var(--project-green); outline-offset: 4px; }
.project-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--project-line);
  background: rgba(5, 16, 16, .92);
  backdrop-filter: blur(18px);
}
.project-topbar__inner, .project-shell, .project-footer__inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}
.project-topbar__inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
.project-brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; }
.project-brand img { width: 42px; height: 42px; display: block; }
.project-brand span { font-size: .78rem; letter-spacing: .16em; line-height: 1.2; text-transform: uppercase; }
.project-brand small { display: block; margin-top: .3rem; color: var(--project-muted); font-size: .6rem; letter-spacing: .12em; }
.project-nav { display: flex; align-items: center; gap: 1.2rem; }
.project-nav a { color: var(--project-muted); font-size: .72rem; letter-spacing: .12em; text-decoration: none; text-transform: uppercase; }
.project-nav a:hover { color: var(--project-text); }
.project-nav__toggle { display: none; border: 1px solid var(--project-line-strong); border-radius: 3px; padding: .65rem .8rem; background: transparent; color: var(--project-teal); letter-spacing: .1em; font-size: .7rem; }
.project-main { padding: 7rem 0 5rem; }
.project-eyebrow, .section-kicker { color: var(--project-teal); font-size: .7rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.project-hero { max-width: 780px; margin-bottom: 3.2rem; }
.project-hero h1, .case-hero h1 { margin: .7rem 0 1rem; overflow-wrap: normal; word-break: normal; hyphens: none; letter-spacing: -.055em; line-height: .98; text-transform: uppercase; }
.project-hero h1 { font-size: clamp(2.4rem, 7vw, 5.8rem); }
.case-hero h1 { font-size: clamp(2.4rem, 5.2vw, 5rem); }
.case-hero--legend h1 { width: min(100%, 600px); font-size: clamp(2.2rem, 4.55vw, 4.4rem); overflow-wrap: normal; word-break: normal; hyphens: none; }
.project-hero p, .case-hero__summary { max-width: 680px; margin: 0; color: var(--project-muted); font-size: clamp(1rem, 1.7vw, 1.22rem); }
.project-hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.7rem; }
.outline-btn, .text-link { display: inline-flex; align-items: center; gap: .6rem; color: var(--project-green); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-decoration: none; text-transform: uppercase; }
.outline-btn { border: 1px solid var(--project-line-strong); padding: .82rem 1rem; }
.outline-btn:hover, .text-link:hover { border-color: var(--project-green); color: var(--project-text); }
.project-hub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.hub-card, .case-panel, .demo-card, .contact-card { border: 1px solid var(--project-line); background: var(--project-panel); box-shadow: var(--project-shadow); }
.hub-card { min-width: 0; display: flex; flex-direction: column; }
.hub-card-art { position: relative; aspect-ratio: 16 / 10; overflow: hidden; border-bottom: 1px solid var(--project-line); background: #071616; }
.project-card__picture, .project-card__picture img { width: 100%; height: 100%; display: block; }
.project-card__picture img { object-fit: contain; object-position: center; }
.project-card-category { position: absolute; top: .85rem; left: .85rem; border: 1px solid var(--project-line-strong); padding: .3rem .45rem; background: rgba(7, 16, 16, .82); color: var(--project-text); font-size: .6rem; font-weight: 700; letter-spacing: .14em; text-shadow: 0 2px 14px #000; text-transform: uppercase; }
.hub-card-body { display: flex; flex: 1; flex-direction: column; padding: 1.25rem; }
.hub-card h2 { min-height: 3.2rem; margin: .85rem 0 .55rem; font-size: 1.1rem; letter-spacing: -.02em; line-height: 1.2; text-transform: uppercase; }
.hub-card p { min-height: 5.3rem; margin: 0; color: var(--project-muted); font-size: .9rem; }
.status-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem; min-height: 1.5rem; }
.status-label, .project-card-demo { color: var(--project-green); font-size: .62rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.project-card-demo { color: var(--project-muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: .45rem; min-height: 2rem; margin: 1rem 0 1.35rem; }
.tag-list span { border: 1px solid var(--project-line); padding: .22rem .48rem; color: var(--project-muted); font-size: .65rem; letter-spacing: .06em; }
.hub-card .text-link { margin-top: auto; }
.project-footer { border-top: 1px solid var(--project-line); padding: 2.4rem 0; background: rgba(4, 12, 12, .78); }
.project-footer__inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.project-footer p { margin: 0; color: var(--project-muted); font-size: .78rem; }
.project-footer nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.project-footer nav a { color: var(--project-muted); font-size: .68rem; letter-spacing: .1em; text-decoration: none; text-transform: uppercase; }
.project-footer nav a:hover { color: var(--project-text); }
.case-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: clamp(2rem, 4vw, 4rem); margin-bottom: 3.5rem; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: .55rem; margin-bottom: 2rem; color: var(--project-muted); font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; }
.breadcrumbs a { color: var(--project-teal); text-decoration: none; }
.case-hero__art { min-width: 0; width: 100%; aspect-ratio: 4 / 3; display: grid; place-items: center; border: 1px solid var(--project-line-strong); padding: .35rem; background: rgba(5, 20, 20, .74); box-shadow: 0 0 55px rgba(85, 226, 187, .08); }
.case-hero__art img { width: 100%; height: 100%; display: block; object-fit: contain; object-position: center; }
.case-hero__meta { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.5rem; }
.case-hero__meta span { border: 1px solid var(--project-line); padding: .38rem .58rem; color: var(--project-muted); font-size: .68rem; }
.case-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(230px, .55fr); gap: 1.25rem; }
.case-content { min-width: 0; }
.case-panel { margin-bottom: 1.25rem; padding: clamp(1.25rem, 3vw, 2rem); }
.case-panel h2 { margin: 0 0 .8rem; font-size: 1.35rem; letter-spacing: -.02em; text-transform: uppercase; }
.case-panel h3 { margin: 1.4rem 0 .4rem; color: var(--project-teal); font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; }
.case-panel p { margin: .7rem 0 0; color: var(--project-muted); }
.case-panel ul { margin: .8rem 0 0; padding-left: 1.2rem; color: var(--project-muted); }
.case-panel li + li { margin-top: .45rem; }
.model-assumptions { margin-top: 1rem !important; border-top: 1px solid var(--project-line); padding-top: .8rem; color: var(--project-text) !important; }
.case-evidence h2 { margin-bottom: 1rem; }
.case-section__intro { max-width: 72ch; margin: 0 0 1rem; color: var(--project-muted); }
.evidence-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.evidence-card { min-width: 0; margin: 0; border: 1px solid var(--project-line); background: rgba(5, 20, 20, .62); }
.evidence-card picture, .evidence-card img { display: block; width: 100%; }
.evidence-card img { aspect-ratio: 16 / 10; object-fit: contain; background: #071616; }
.evidence-card figcaption { padding: .75rem; color: var(--project-muted); font-size: .75rem; line-height: 1.45; }
.evidence-empty { margin: 0; border: 1px dashed var(--project-line-strong); padding: 1rem; color: var(--project-muted); }
.case-panel--future { border-color: rgba(181, 243, 107, .34); background: rgba(181, 243, 107, .045); }
.case-panel--future h2 { color: var(--project-green); }
.case-panel--privacy { border-left: 3px solid var(--project-green); background: rgba(181, 243, 107, .06); }
.case-panel--privacy p { color: var(--project-text); }
.related-list { display: grid; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.related-list li { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .75rem; border-bottom: 1px solid var(--project-line); padding-bottom: .65rem; }
.related-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.related-list span { color: var(--project-muted); font-size: .82rem; }
.related-list .text-link { flex: 0 0 auto; }
.evidence-grid--mobile { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.evidence-grid--mobile .evidence-card img { aspect-ratio: 9 / 16; }
.case-aside { min-width: 0; }
.case-aside .case-panel { position: sticky; top: 100px; }
.aside-list { display: grid; gap: .85rem; margin: 0; }
.aside-list dt { color: var(--project-teal); font-size: .62rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.aside-list dd { margin: .2rem 0 0; color: var(--project-muted); font-size: .85rem; }
.case-notice { border-left: 3px solid var(--project-green); background: rgba(181, 243, 107, .06); color: var(--project-text); }
.case-notice p { color: var(--project-text); }
.flow-diagram { display: grid; grid-template-columns: repeat(4, 1fr); gap: .55rem; margin-top: 1.25rem; }
.flow-node { position: relative; min-height: 76px; display: grid; place-items: center; padding: .65rem; border: 1px solid var(--project-line-strong); background: rgba(14, 43, 39, .62); color: var(--project-text); font-size: .67rem; font-weight: 700; letter-spacing: .08em; text-align: center; text-transform: uppercase; }
.flow-node:not(:nth-child(4n))::after { content: "→"; position: absolute; right: -.72rem; color: var(--project-green); font-size: 1.05rem; z-index: 1; }
.flow-node--wide { grid-column: span 2; }
.demo-card { padding: clamp(1.25rem, 3vw, 2rem); }
.demo-card h2 { margin: 0 0 .55rem; font-size: 1.2rem; text-transform: uppercase; }
.demo-card > p { margin: 0 0 1.2rem; color: var(--project-muted); }
.demo-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: .75rem; }
.demo-form label { display: grid; gap: .35rem; color: var(--project-muted); font-size: .7rem; letter-spacing: .05em; }
.demo-form label:first-child { grid-column: 1 / -1; }
.demo-form input { width: 100%; border: 1px solid var(--project-line-strong); border-radius: 0; padding: .7rem .75rem; background: #071616; color: var(--project-text); }
.demo-form button { grid-column: 1 / -1; border: 1px solid var(--project-green); padding: .78rem 1rem; background: var(--project-green); color: #06100d; font-size: .7rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.demo-form button:hover { background: var(--project-teal); }
.demo-output { min-height: 3.1rem; display: grid; gap: .18rem; margin-top: 1rem; border-top: 1px solid var(--project-line); padding-top: .9rem; color: var(--project-muted); font-size: .85rem; }
.demo-output strong { color: var(--project-green); letter-spacing: .08em; text-transform: uppercase; }
.demo-output span { color: var(--project-text); }
.demo-note { margin: 1rem 0 0; color: var(--project-muted); font-size: .72rem; }
.case-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; margin-top: 2rem; border: 1px solid var(--project-line); padding: 1.25rem; background: rgba(13, 35, 33, .62); }
.case-cta p { margin: 0; color: var(--project-muted); }
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .project-hub-grid { grid-template-columns: repeat(2, 1fr); }
  .case-hero { grid-template-columns: 1fr; }
  .case-hero__art { max-width: 620px; }
  .case-layout { grid-template-columns: 1fr; }
  .case-aside .case-panel { position: static; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-grid--mobile { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .flow-diagram { grid-template-columns: repeat(2, 1fr); }
  .flow-node:not(:nth-child(4n))::after { right: -.72rem; }
  .flow-node:nth-child(2n)::after { display: none; }
}

@media (max-width: 620px) {
  .project-topbar__inner, .project-shell, .project-footer__inner { width: min(100% - 28px, 1180px); }
  .project-topbar__inner { min-height: 66px; }
  .project-nav__toggle { display: block; }
  .project-nav { position: absolute; top: 66px; right: 14px; left: 14px; display: none; flex-direction: column; align-items: stretch; gap: 0; border: 1px solid var(--project-line-strong); padding: .4rem; background: #071616; box-shadow: var(--project-shadow); }
  .project-nav.is-open { display: flex; }
  .project-nav a { padding: .85rem; }
  .project-main { padding-top: 4.2rem; }
  .project-hero h1 { font-size: clamp(2.3rem, 14vw, 4rem); }
  .case-hero h1 { font-size: clamp(2.1rem, 11vw, 3.4rem); }
  .case-hero--legend h1 { width: 100%; font-size: clamp(2.1rem, 11vw, 3.4rem); }
  .project-hub-grid { grid-template-columns: 1fr; }
  .hub-card h2, .hub-card p { min-height: auto; }
  .project-footer__inner { align-items: flex-start; flex-direction: column; }
  .case-hero { gap: 1.6rem; margin-bottom: 2.5rem; }
  .flow-diagram, .demo-form { grid-template-columns: 1fr; }
  .evidence-grid--mobile { grid-template-columns: 1fr; }
  .flow-node, .flow-node--wide { grid-column: auto; }
  .flow-node:not(:nth-child(4n))::after, .flow-node:nth-child(2n)::after { display: block; right: auto; bottom: -.83rem; left: 50%; transform: translateX(-50%) rotate(90deg); }
  .demo-form label:first-child { grid-column: auto; }
  .demo-form button { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* PORTFOLIO-10 project hub layer: restrained index controls around the
   existing case-study language. */
.project-hero--hub {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  align-items: end;
  gap: clamp(2rem, 6vw, 6rem);
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--project-line);
}
.project-hero__copy { min-width: 0; }
.project-index-hud {
  position: relative;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--project-line-strong);
  padding: 1.1rem;
  background: linear-gradient(145deg, rgba(13, 39, 36, .86), rgba(5, 17, 18, .84));
  box-shadow: inset 0 0 0 1px rgba(181, 243, 107, .04);
}
.project-index-hud::before,
.project-index-hud::after {
  position: absolute;
  width: 22px;
  height: 22px;
  border-color: var(--project-green);
  content: "";
}
.project-index-hud::before { top: -1px; left: -1px; border-top: 2px solid; border-left: 2px solid; }
.project-index-hud::after { right: -1px; bottom: -1px; border-right: 2px solid; border-bottom: 2px solid; }
.project-index-hud__label { color: var(--project-teal); font-size: .62rem; font-weight: 700; letter-spacing: .16em; }
.project-index-hud strong { color: var(--project-text); font: 700 clamp(1.5rem, 3vw, 2.2rem)/1 var(--project-mono, "IBM Plex Mono", monospace); letter-spacing: -.04em; text-transform: uppercase; }
.project-index-hud__rows { display: grid; gap: .55rem; border-top: 1px solid var(--project-line); padding-top: .85rem; }
.project-index-hud__rows span { display: flex; align-items: center; gap: .55rem; color: var(--project-muted); font-size: .64rem; letter-spacing: .1em; }
.project-index-hud__rows i { width: .45rem; height: .45rem; border: 1px solid var(--project-green); background: rgba(181, 243, 107, .42); box-shadow: 0 0 10px rgba(181, 243, 107, .32); }
.project-index { margin-top: 3.5rem; }
.project-index__toolbar { display: flex; align-items: end; justify-content: space-between; gap: 1.5rem; margin-bottom: 2.6rem; }
.project-artwork-note { max-width: 660px; margin: .65rem 0 0; color: var(--project-muted); font-size: .8rem; }
.project-filters { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .5rem; }
.project-filter { border: 1px solid var(--project-line); padding: .65rem .78rem; background: rgba(5, 18, 18, .65); color: var(--project-muted); font-size: .62rem; font-weight: 700; letter-spacing: .1em; }
.project-filter:hover, .project-filter.is-active, .project-filter[aria-pressed="true"] { border-color: var(--project-green); color: var(--project-green); background: rgba(181, 243, 107, .08); }
.project-filter:focus-visible { outline: 2px solid var(--project-green); outline-offset: 3px; }
.project-group { margin-top: 3rem; }
.project-group[hidden] { display: none; }
.project-group__heading { display: flex; align-items: baseline; gap: .8rem; margin-bottom: 1rem; }
.project-group__heading h2 { margin: 0; font-size: clamp(1.4rem, 2.6vw, 2.1rem); letter-spacing: -.04em; text-transform: uppercase; }
.project-group__count { margin-left: auto; color: var(--project-muted); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; }
.project-hub-grid--github { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.hub-card { transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.hub-card:hover { border-color: var(--project-line-strong); box-shadow: 0 18px 54px rgba(0, 0, 0, .38), 0 0 22px rgba(85, 226, 187, .06); transform: translateY(-2px); }
.hub-card-art::after { position: absolute; right: 0; bottom: 0; left: 0; height: 42%; background: linear-gradient(transparent, rgba(2, 12, 12, .58)); content: ""; pointer-events: none; }
.hub-card-art .project-card__picture img { object-fit: cover; transition: transform .25s ease; }
.hub-card:hover .hub-card-art .project-card__picture img { transform: scale(1.015); }
.hub-card-body { min-height: 275px; }
.hub-card h2 { margin-top: .7rem; }
.hub-card p { min-height: 6.4rem; }
.hub-card-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1rem; margin-top: auto; }
.hub-card-actions .text-link { margin-top: 0; }
.text-link--primary { color: var(--project-green); }
.hub-card-private-note { display: inline-flex; align-items: center; margin-top: auto; color: var(--project-muted); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }

@media (max-width: 1080px) {
  .project-hub-grid--github { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .project-hero--hub { grid-template-columns: 1fr; align-items: start; gap: 1.8rem; }
  .project-index-hud { min-height: 0; gap: 1.2rem; }
  .project-index__toolbar { align-items: flex-start; flex-direction: column; }
  .project-filters { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .project-index { margin-top: 2.4rem; }
  .project-group { margin-top: 2.3rem; }
  .project-group__heading { align-items: flex-start; flex-direction: column; gap: .35rem; }
  .project-group__count { margin-left: 0; }
  .project-hub-grid--github { grid-template-columns: 1fr; }
  .project-filter { flex: 1 1 auto; min-width: 0; }
  .project-filters { width: 100%; }
  .hub-card-body { min-height: 0; }
  .hub-card p { min-height: 0; }
}