/* MRI-001 isolated final layout
   Drop this folder into /mri/001/. It intentionally avoids the older MRI classes. */

:root {
  --paper: #f7f4ee;
  --ink: #111111;
  --graphite: #3f3d39;
  --muted: #6b6964;
  --rule: #d9d2c5;
  --rule-strong: #aaa295;
  --rust: #b55447;
  --berkeley-rgb: 93, 77, 106;
  --mri-rgb: 80, 101, 82;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --gutter: clamp(22px, 3vw, 46px);
  --max-width: 1440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 8px 12px;
  background: var(--ink);
  color: var(--paper);
  opacity: 0;
  pointer-events: none;
}
.skip-link:focus {
  opacity: 1;
  pointer-events: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 58px;
  padding: 14px var(--gutter);
  border-bottom: 1px solid rgba(217, 210, 197, 0.7);
  background: rgba(247, 244, 238, 0.94);
  backdrop-filter: blur(12px);
}
.wordmark,
.site-header nav a {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 650;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
}
.site-header nav {
  display: flex;
  gap: 20px;
}
.site-header nav a[aria-current="page"] {
  color: var(--rust);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 8px;
}

.mri001-simple {
  width: min(calc(100% - (var(--gutter) * 2)), var(--max-width));
  margin-inline: auto;
  padding: clamp(48px, 7vw, 96px) 0 82px;
}
.mri001-simple-hero {
  min-height: min(520px, calc(72svh - 58px));
  display: grid;
  align-content: center;
  justify-items: center;
  max-width: 900px;
  margin: 0 auto;
  padding-bottom: clamp(16px, 3vw, 36px);
  text-align: center;
}
.mri001-simple-kicker,
.mri001-simple-label {
  margin: 0;
  color: var(--rust);
  font-family: var(--sans);
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.035em;
  line-height: 1.2;
  text-transform: uppercase;
}
.mri001-simple-kicker {
  position: absolute;
  top: 0.2em;
  left: 50%;
  font-size: 0.98rem;
  white-space: nowrap;
  transform: translate(-50%, -100%);
}
.mri001-simple-hero h1 {
  margin: 14px 0 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(5.8rem, 15vw, 13.5rem);
  font-weight: 400;
  line-height: 0.86;
}
.mri001-hero-lockup {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.035em;
}
.mri001-hero-arrow-wrap {
  position: relative;
  display: inline-block;
}
.mri001-hero-arrow {
  display: inline-block;
}
.mri001-simple-deck {
  margin: clamp(20px, 2.6vw, 32px) 0 0;
  color: var(--graphite);
  font-family: var(--serif);
  font-size: clamp(1.22rem, 2.15vw, 1.72rem);
  font-weight: 500;
  line-height: 1.24;
}
.mri001-simple-lede {
  max-width: 700px;
  margin: 20px 0 0;
  color: var(--muted);
  font-family: var(--sans);
  font-size: clamp(1.02rem, 1.5vw, 1.26rem);
  line-height: 1.5;
}
.mri001-simple-cue {
  margin: clamp(28px, 4vw, 48px) 0 0;
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 650;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.mri001-simple-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(62px, 9vw, 120px) 0;
  text-align: center;
}
.mri001-question-first {
  padding-top: clamp(12px, 2.2vw, 32px);
}
.mri001-question-title {
  font-family: var(--sans);
  font-size: clamp(0.9rem, 1.15vw, 1.02rem);
  text-transform: none;
}
.mri001-simple-label {
  margin-bottom: clamp(24px, 3.5vw, 42px);
}
.mri001-constellation {
  display: grid;
  align-items: end;
  justify-items: center;
  width: min(100%, 980px);
  margin: 0 auto 70px;
  column-gap: clamp(28px, 5vw, 76px);
  row-gap: clamp(42px, 5vw, 72px);
}
.mri001-constellation--berkeley {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  max-width: 980px;
}
.mri001-constellation--mri {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 800px;
}
.mri001-constellation-item {
  width: var(--circle-size);
  margin: 0;
}
.mri001-constellation-item img {
  display: block;
  width: var(--circle-size);
  height: var(--circle-size);
  border: 1px solid rgba(112, 106, 97, 0.28);
  border-radius: 50%;
  object-fit: contain;
  opacity: 0.98;
  mix-blend-mode: multiply;
}
.mri001-constellation-item--berkeley img {
  filter: brightness(0) saturate(100%) invert(32%) sepia(13%) saturate(730%) hue-rotate(239deg) brightness(90%) contrast(90%);
}
.mri001-constellation-item--mri img {
  filter: brightness(0) saturate(100%) invert(36%) sepia(16%) saturate(610%) hue-rotate(74deg) brightness(92%) contrast(88%);
}
.mri001-constellation-label {
  position: relative;
  z-index: 2;
  max-width: calc(var(--circle-size) + 26px);
  margin: 12px auto 0;
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(0.72rem, 0.92vw, 0.88rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.18;
}
.mri001-constellation-item--berkeley-agentic {
  --circle-size: clamp(300px, 33vw, 420px);
  grid-column: 1 / span 3;
}
.mri001-constellation-item--berkeley-multiturn {
  --circle-size: clamp(245px, 25vw, 330px);
  grid-column: 4 / span 3;
}
.mri001-constellation-item--berkeley-live {
  --circle-size: clamp(150px, 14vw, 180px);
  grid-column: 1 / span 2;
}
.mri001-constellation-item--berkeley-nonlive {
  --circle-size: clamp(150px, 14vw, 180px);
  grid-column: 3 / span 2;
}
.mri001-constellation-item--berkeley-irrelevance {
  --circle-size: clamp(150px, 14vw, 180px);
  grid-column: 5 / span 2;
}
.mri001-constellation-item--mri-accuracy {
  --circle-size: clamp(310px, 35vw, 440px);
  grid-column: 1 / span 2;
}
.mri001-constellation-item--mri-cost {
  --circle-size: clamp(220px, 22vw, 280px);
  grid-column: 3 / span 2;
}
.mri001-constellation-item--mri-relevance {
  --circle-size: clamp(195px, 19vw, 240px);
  grid-column: 1 / span 2;
}
.mri001-constellation-item--mri-latency {
  --circle-size: clamp(168px, 16vw, 205px);
  grid-column: 3 / span 2;
}
.mri001-simple-copy,
.mri001-simple-punch,
.mri001-simple-finding p {
  max-width: 760px;
  margin: 0 auto;
  color: var(--graphite);
  font-family: var(--sans);
  font-size: clamp(1.02rem, 1.18vw, 1.14rem);
  line-height: 1.55;
}
.mri001-simple-punch {
  margin-top: 18px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.18rem, 1.8vw, 1.42rem);
  font-weight: 400;
  line-height: 1.3;
}
.mri001-simple-finding {
  max-width: 900px;
  padding-top: clamp(72px, 10vw, 130px);
  border-top: 1px solid var(--rule-strong);
}
.mri001-simple-finding h2 {
  margin: 0 0 18px;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(2.35rem, 5vw, 4.65rem);
  font-weight: 400;
  line-height: 1.02;
}
.mri001-simple-finding p + p {
  margin-top: 16px;
}
.mri001-simple-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 34px;
  margin-top: 32px;
}
.mri001-simple-links a {
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 650;
  text-decoration: none;
  text-transform: uppercase;
  text-underline-offset: 6px;
}
.mri001-simple-links a:hover,
.mri001-simple-links a:focus-visible {
  color: var(--rust);
  text-decoration: underline;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 30px;
  margin-top: 28px;
}
.actions a {
  color: var(--ink);
  font-size: 0.76rem;
  font-weight: 650;
  text-decoration: none;
  text-transform: uppercase;
  text-underline-offset: 6px;
}
.actions a:hover,
.actions a:focus-visible {
  color: var(--rust);
  text-decoration: underline;
}
.site-footer {
  padding: 20px var(--gutter) 28px;
  color: #8f8a80;
  font-size: 0.78rem;
  text-align: center;
}
.site-footer p { margin: 0; }

/* Long-form pages */
.prose-shell {
  width: min(calc(100% - (var(--gutter) * 2)), 920px);
  margin: 0 auto;
  padding: 58px 0 76px;
}
.prose-kicker {
  margin: 0 0 12px;
  color: var(--rust);
  font-size: 0.76rem;
  font-weight: 650;
  text-transform: uppercase;
}
.prose-shell h1 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: clamp(3rem, 7vw, 6.2rem);
  font-weight: 400;
  line-height: 0.96;
}
.prose-deck {
  max-width: 760px;
  margin: 0 0 48px;
  color: var(--graphite);
  font-family: var(--sans);
  font-size: clamp(1.08rem, 1.45vw, 1.28rem);
  line-height: 1.48;
}
.prose-shell section {
  padding: 34px 0;
  border-top: 1px solid var(--rule);
}
.prose-shell h2 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3vw, 2.65rem);
  font-weight: 400;
  line-height: 1.08;
}
.prose-shell h3 {
  margin: 28px 0 10px;
  font-family: var(--sans);
  font-size: 0.84rem;
  font-weight: 700;
  text-transform: uppercase;
}
.prose-shell p,
.prose-shell li {
  color: var(--graphite);
  font-family: var(--sans);
  font-size: 1.04rem;
  line-height: 1.62;
}
.prose-shell p { margin: 0 0 18px; }
.prose-shell ul,
.prose-shell ol { padding-left: 1.3em; }
.prose-shell li + li { margin-top: 10px; }
.callout {
  margin: 28px 0;
  padding: 22px 24px;
  border-left: 2px solid var(--rust);
  background: rgba(181, 84, 71, 0.035);
}
.callout p:last-child { margin-bottom: 0; }
.data-table {
  width: 100%;
  margin: 24px 0;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.94rem;
}
.data-table th,
.data-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.data-table th { color: var(--ink); font-weight: 650; }
.data-table td { color: var(--muted); }
.source-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.source-list a {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}
.source-list a:hover { color: var(--rust); }

@media (max-width: 700px) {
  body { font-size: 16px; }
  .site-header {
    flex-wrap: wrap;
  }
  .site-header nav {
    width: 100%;
    justify-content: space-between;
  }
  .mri001-simple {
    padding-top: 46px;
  }
  .mri001-simple-hero {
    min-height: auto;
    padding: 32px 0 68px;
  }
  .mri001-simple-section {
    padding: 58px 0;
  }
  .mri001-constellation {
    display: grid;
    gap: 30px;
    grid-template-columns: 1fr;
    justify-items: center;
    margin-bottom: 48px;
  }
  .mri001-constellation-item {
    grid-column: auto;
  }
  .mri001-constellation-item--berkeley-agentic,
  .mri001-constellation-item--mri-accuracy {
    --circle-size: clamp(250px, 78vw, 330px);
  }
  .mri001-constellation-item--berkeley-multiturn {
    --circle-size: clamp(215px, 66vw, 275px);
  }
  .mri001-constellation-item--mri-cost {
    --circle-size: clamp(205px, 62vw, 255px);
  }
  .mri001-constellation-item--mri-relevance {
    --circle-size: clamp(190px, 56vw, 230px);
  }
  .mri001-constellation-item--mri-latency {
    --circle-size: clamp(165px, 49vw, 205px);
  }
  .mri001-constellation-item--berkeley-live,
  .mri001-constellation-item--berkeley-nonlive,
  .mri001-constellation-item--berkeley-irrelevance {
    --circle-size: clamp(150px, 45vw, 180px);
  }
  .mri001-simple-links,
  .actions {
    display: grid;
  }
}