:root {
  --ink: #102f3d;
  --paper: #f3eee4;
  --cream: #fffaf1;
  --sun: #efb735;
  --clay: #a54c3f;
  --line: rgba(16, 47, 61, .24);
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.55 var(--sans); }
a { color: inherit; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; top: -5rem; left: 1rem; z-index: 20; padding: .75rem 1rem; background: var(--sun); font-weight: 800; }
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 4px; }

.review-masthead {
  min-height: 92px;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr);
  align-items: center;
  gap: 2rem;
  padding: 1rem clamp(1rem, 4vw, 4.5rem);
  border-bottom: 1px solid var(--line);
  background: rgba(243, 238, 228, .93);
  backdrop-filter: blur(14px);
  position: relative;
  z-index: 5;
}
.facility-mark { width: min(205px, 100%); }
.facility-mark img { width: 100%; height: auto; }
.review-masthead p { margin: 0; text-align: center; font-size: .67rem; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.review-masthead p span { margin: 0 .4rem; color: var(--clay); }
.signature-link { justify-self: end; font-size: .75rem; font-weight: 850; text-underline-offset: .3em; }

.review-layout { display: grid; grid-template-columns: minmax(310px, .68fr) minmax(0, 1.32fr); align-items: start; }
.review-brief {
  position: sticky;
  top: 0;
  min-height: 100vh;
  padding: clamp(4rem, 7vw, 8rem) clamp(1.5rem, 5vw, 6rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid var(--line);
}
.eyebrow { margin: 0; color: var(--clay); font-size: .68rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -.045em; }
h1 { max-width: 10ch; margin: .8rem 0 1.5rem; font-size: clamp(3.1rem, 5.2vw, 6.3rem); line-height: .92; }
.brief-copy { max-width: 48ch; margin: 0; font-size: .98rem; }
.review-key { margin: 3rem 0 0; border-top: 1px solid var(--ink); }
.review-key div { display: grid; grid-template-columns: 2.4rem 1fr; padding: .8rem 0; border-bottom: 1px solid var(--line); }
.review-key dt { color: var(--clay); font: 400 1.15rem var(--serif); }
.review-key dd { margin: 0; font-size: .78rem; font-weight: 800; align-self: center; }
.prototype-note { max-width: 52ch; margin: 2.5rem 0 0; padding-left: 1rem; border-left: 3px solid var(--sun); color: #4c626b; font-size: .72rem; }
.prototype-note strong { display: block; color: var(--ink); text-transform: uppercase; letter-spacing: .08em; }

.concept-roster { background: var(--ink); color: #fff; }
.concept-row { --accent: var(--sun); min-height: 92vh; border-bottom: 1px solid rgba(255,255,255,.23); }
.concept-row > a { min-height: inherit; display: grid; grid-template-rows: minmax(0, 1fr) auto; text-decoration: none; overflow: hidden; }
.concept-row figure { position: relative; margin: 0; min-height: 520px; overflow: hidden; background: #1f4657; }
.concept-row figure::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(7,27,36,.52)); transition: background .45s ease; }
.concept-row img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.7,.2,1), filter .45s ease; }
.concept-row a:hover img { transform: scale(1.018); filter: saturate(1.04); }
.concept-row a:hover figure::after { background: linear-gradient(180deg, transparent 60%, rgba(7,27,36,.34)); }
.concept-copy { min-height: 178px; display: grid; grid-template-columns: 90px minmax(0, 1fr) auto; align-items: end; gap: 1.5rem; padding: 2rem clamp(1.25rem, 4vw, 4rem) 2.5rem; background: var(--row-bg, var(--ink)); }
.concept-number { align-self: start; padding-top: .35rem; color: var(--accent); font: 400 1.2rem var(--serif); }
.concept-copy p { margin: 0; color: rgba(255,255,255,.68); font-size: .66rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.concept-copy h2 { margin: .35rem 0 0; font-size: clamp(2.3rem, 4vw, 4.6rem); line-height: .94; }
.open-label { align-self: center; white-space: nowrap; font-size: .75rem; font-weight: 850; }
.open-label b { display: inline-grid; place-items: center; width: 2rem; height: 2rem; margin-left: .6rem; border: 1px solid currentColor; border-radius: 50%; transition: transform .3s ease, background .3s ease, color .3s ease; }
.concept-row a:hover .open-label b { transform: translate(.2rem,-.2rem); background: var(--accent); border-color: var(--accent); color: var(--ink); }
.concept-a { --accent: #e3c977; --row-bg: #163d4b; }
.concept-a img { object-position: center 42%; }
.concept-b { --accent: #ff806d; --row-bg: #172127; }
.concept-b figure, .concept-d figure, .concept-e figure { min-height: 610px; }
.concept-c { --accent: #efb735; --row-bg: #0d2835; }
.concept-d { --accent: #ff9e18; --row-bg: #003b71; }
.concept-d figure::after { background: linear-gradient(90deg, rgba(0,59,113,.08), rgba(0,59,113,.48) 100%); }
.concept-e { --accent: #f1e4b2; --row-bg: #44797b; }
.concept-e figure::after { background: linear-gradient(180deg, rgba(0,59,113,.04) 32%, rgba(0,59,113,.58) 100%); }

.review-strip { display: grid; grid-template-columns: .45fr 1.55fr; gap: clamp(2rem, 6vw, 8rem); padding: clamp(5rem, 9vw, 9rem) clamp(1rem, 6vw, 7rem); background: var(--sun); color: var(--ink); }
.review-strip > p { margin: 0; font: 400 clamp(2rem, 4vw, 4rem)/1 var(--serif); }
.review-strip ul { margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--ink); counter-reset: question; }
.review-strip li { counter-increment: question; display: grid; grid-template-columns: 3.5rem 1fr; gap: 1rem; padding: 1.25rem 0; border-bottom: 1px solid rgba(16,47,61,.45); font-size: clamp(1rem, 1.5vw, 1.3rem); }
.review-strip li::before { content: "0" counter(question); font: 400 1rem var(--serif); }

footer { display: flex; justify-content: space-between; gap: 2rem; padding: 2rem clamp(1rem, 4vw, 4.5rem); background: #081f2a; color: #afc0c6; font-size: .68rem; letter-spacing: .08em; text-transform: uppercase; }
footer p { margin: 0; }

@media (max-width: 900px) {
  .review-masthead { grid-template-columns: 1fr auto; }
  .review-masthead p { display: none; }
  .review-layout { grid-template-columns: 1fr; }
  .review-brief { position: relative; min-height: auto; border-right: 0; }
  h1 { max-width: 12ch; }
  .concept-row { min-height: auto; }
  .concept-row figure, .concept-b figure, .concept-d figure, .concept-e figure { min-height: 58vw; }
  .concept-copy { min-height: 158px; }
}

@media (max-width: 620px) {
  .review-masthead { min-height: 76px; padding: .85rem 1rem; }
  .facility-mark { width: 170px; }
  .signature-link { font-size: 0; }
  .signature-link::after { content: "Signature ↗"; font-size: .68rem; }
  .review-brief { padding: 4.5rem 1rem; }
  h1 { font-size: clamp(3rem, 16vw, 4.6rem); }
  .concept-copy { grid-template-columns: 52px 1fr; gap: .8rem; padding: 1.5rem 1rem 2rem; }
  .concept-number { grid-row: 1 / 3; }
  .open-label { grid-column: 2; justify-self: start; }
  .concept-row figure, .concept-b figure, .concept-d figure, .concept-e figure { min-height: 74vw; }
  .review-strip { grid-template-columns: 1fr; padding: 5rem 1rem; }
  footer { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .concept-row img, .open-label b { transition: none; }
}