:root {
  --ink: #10120e;
  --paper: #efeee7;
  --signal: #c7ff35;
  --orange: #ff8b46;
  --blue: #69a9ff;
  --purple: #c68cff;
  --line: rgba(16, 18, 14, .2);
}

/* Version K — an editorial circuit board, deliberately flat and tactile. */
:root {
  --ink: #17312f;
  --paper: #f8f6ee;
  --signal: #c5eb35;
  --copper: #ae6b42;
  --blue: #557e9a;
  --orange: #d6a42c;
  --purple: #4ab69d;
  --line: rgba(23, 49, 47, .2);
}

html { background: #e9e6db; }
body {
  color: var(--ink);
  background: #e9e6db;
  font-family: "DM Sans", Arial, sans-serif;
}

.site-header {
  position: relative;
  z-index: 20;
  height: 68px;
  padding: 0 clamp(1.2rem, 2.4vw, 2.6rem);
  background: rgba(248,246,238,.96);
}
.site-header::after { content: ""; position: absolute; right: 0; bottom: -5px; left: 0; height: 1px; background: rgba(23,49,47,.3); }
.brand { font-family: "JetBrains Mono", monospace; }
.brand-symbol { width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; gap: 3px; border: 1px solid var(--ink); border-radius: 50%; transform: none; }
.brand-symbol i { width: 3px; height: 15px; transform: rotate(27deg); }
.header-thesis, .contact-link { font-family: "JetBrains Mono", monospace; }
.header-thesis i { color: var(--copper); }
.contact-link { padding: .68rem 1rem; border: 1px solid var(--ink); transition: .18s ease; }
.contact-link:hover, .contact-link:focus-visible { color: var(--paper); background: var(--ink); }

.screen { grid-template-columns: minmax(380px, 42%) 1fr; height: calc(100dvh - 68px); min-height: 650px; }
.intro {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, transparent calc(100% - 22px), rgba(174,107,66,.16) calc(100% - 22px), rgba(174,107,66,.16) calc(100% - 21px), transparent calc(100% - 21px)),
    radial-gradient(circle, rgba(23,49,47,.1) 1px, transparent 1.4px),
    var(--paper);
  background-size: auto, 26px 26px, auto;
}
.intro::before { content: ""; position: absolute; top: 92px; right: -1px; width: 105px; height: 74px; border-top: 2px solid var(--copper); border-left: 2px solid var(--copper); border-radius: 24px 0 0; opacity: .7; }
.intro::after { content: ""; position: absolute; top: 85px; right: 96px; width: 12px; height: 12px; border: 2px solid var(--copper); border-radius: 50%; background: var(--paper); }
.intro-top, .intro-bottom { position: relative; z-index: 1; }
.intro-top { padding-top: clamp(2.2rem, 4.2vh, 4rem); }
.kicker { color: #7c5038; font-family: "JetBrains Mono", monospace; letter-spacing: .12em; }
.pulse { border: 1px solid var(--ink); box-shadow: 0 0 0 4px var(--paper), 0 0 0 5px rgba(23,49,47,.18); }
h1 { max-width: 720px; font-family: "Instrument Serif", Georgia, serif; font-size: clamp(3rem, 4.3vw, 5.25rem); font-weight: 400; line-height: .91; letter-spacing: -.025em; }
h1 em { color: #7c5038; font-family: inherit; }
.intro-copy { padding-top: 1rem; border-top: 1px solid rgba(23,49,47,.25); }
.intro-copy p { color: #576864; font-size: clamp(.76rem, .82vw, .92rem); }
.intro-copy p:first-child { color: #576864; }
.intro-copy p:last-child { padding: .2rem 0 .2rem 1rem; border-top: 0; border-left: 3px solid var(--signal); color: var(--ink); }
.intro-bottom { border-top: 0; }
.approach-button { margin: 0 clamp(1.5rem, 3vw, 3.6rem); width: calc(100% - clamp(3rem, 6vw, 7.2rem)); padding: .9rem 1rem; border: 1px solid var(--ink); border-left: 8px solid var(--signal); background: #fdfcf6; box-shadow: 7px 7px 0 rgba(23,49,47,.09); transition: .18s ease; }
.approach-button:hover, .approach-button:focus-visible { transform: translate(-2px,-2px); box-shadow: 10px 10px 0 rgba(23,49,47,.1); }
.approach-button span { font-family: "Instrument Serif", Georgia, serif; font-size: clamp(1.08rem, 1.35vw, 1.4rem); font-weight: 400; }
.approach-button small, .approach-button > b { font-family: "JetBrains Mono", monospace; }
.approach-button small { color: #7c5038; }
.people-strip { padding-top: 1rem; color: #5d6b67; font-family: "JetBrains Mono", monospace; }
.people-strip > span { color: #7c5038; }
.people-strip p { font-family: inherit; }

.atlas { position: relative; isolation: isolate; background: linear-gradient(rgba(23,49,47,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(23,49,47,.035) 1px, transparent 1px), #e9e6db; background-size: 52px 52px; }
.board-traces { position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .55; }
.board-traces svg { width: 100%; height: 100%; }
.board-traces .trace { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.board-traces .trace-copper { stroke: var(--copper); }
.board-traces .trace-green { stroke: #4ab69d; }
.board-traces .trace-blue { stroke: var(--blue); }
.board-traces .trace-faint { stroke: rgba(23,49,47,.22); stroke-dasharray: 4 8; }
.board-traces circle { fill: #e9e6db; stroke: var(--copper); stroke-width: 2; vector-effect: non-scaling-stroke; }
.board-traces circle:first-of-type { fill: var(--signal); stroke: var(--ink); }
.atlas-header { padding: clamp(1.2rem, 2.4vh, 2rem) clamp(1.3rem, 2.4vw, 2.5rem); border-bottom: 0; }
.atlas-header h2 { font-family: "Instrument Serif", Georgia, serif; font-size: clamp(2rem, 2.8vw, 3.2rem); font-weight: 400; letter-spacing: -.02em; }
.atlas-header > p { color: #66736f; font-family: "JetBrains Mono", monospace; }
.atlas-header > p span { color: var(--copper); }
.challenge-grid { gap: clamp(1.1rem, 1.7vw, 1.8rem); padding: 0 clamp(1.3rem, 2.4vw, 2.5rem) clamp(1.3rem, 2.4vw, 2.5rem); }
.challenge, .challenge:nth-child(even), .challenge:nth-child(n+3) { border: 1px solid var(--ink); background: rgba(250,249,243,.95); box-shadow: 7px 7px 0 rgba(23,49,47,.1); overflow: visible; transition: .18s ease; }
.challenge { --accent: var(--copper); padding: clamp(1rem, 1.7vw, 1.65rem); }
.challenge-grid-connection { --accent: var(--orange); }
.challenge-buildings { --accent: var(--purple); }
.challenge-data { --accent: var(--blue); }
.challenge::before { inset: 8px; border: 1px solid rgba(23,49,47,.09); background: transparent; transform: none; opacity: 1; }
.challenge::after { content: ""; position: absolute; top: 24%; right: -11px; width: 20px; height: 7px; border: 1px solid var(--ink); background: var(--accent); box-shadow: 0 17px 0 #e9e6db, 0 17px 0 1px var(--ink), 0 34px 0 var(--accent), 0 34px 0 1px var(--ink); opacity: 1 !important; }
.challenge:hover, .challenge:focus-visible { transform: translate(-3px,-3px); background: #fffef9; box-shadow: 11px 11px 0 rgba(23,49,47,.14); }
.challenge:hover::before, .challenge:focus-visible::before { transform: none; opacity: 1; }
.challenge:hover::after, .challenge:focus-visible::after { opacity: 1; }
.challenge-meta { font-family: "JetBrains Mono", monospace; }
.challenge-meta b { background: var(--accent); }
.challenge-meta i { color: #64726e; }
.challenge-title { color: var(--ink); font-family: "Instrument Serif", Georgia, serif; font-size: clamp(1.75rem, 2.35vw, 2.85rem); font-weight: 400; letter-spacing: -.015em; }
.challenge-question { color: #576864; font-family: "DM Sans", Arial, sans-serif; font-size: clamp(.75rem, .86vw, .92rem); font-style: normal; line-height: 1.38; }
.challenge-action { border-color: rgba(23,49,47,.3); color: #65736f; font-family: "JetBrains Mono", monospace; }
.challenge-action b { color: var(--accent); }
.signal-line { top: -12px; left: 22%; width: 8px; height: 23px; border: 1px solid var(--ink); background: var(--accent); transform: none; opacity: 1; }
.challenge:hover .signal-line { opacity: 1; }

.reader { border: 1px solid var(--ink); background: var(--paper); box-shadow: 18px 18px 0 rgba(23,49,47,.24); }
.reader::backdrop { background: rgba(19,34,32,.72); }
.reader-header { background: rgba(248,246,238,.97); }
.reader-progress { background: rgba(23,49,47,.15); }
.reader-progress i { background: var(--signal); }
.reader-layout { grid-template-columns: 180px minmax(0,1fr); }
.reader-index { background-color: var(--ink); background-image: radial-gradient(circle, rgba(197,235,53,.15) 1px, transparent 1.5px); background-size: 24px 24px; }
.reader-index::after { content: ""; position: absolute; top: 76px; right: 0; width: 45px; height: 58%; border-top: 1px solid var(--signal); border-right: 1px solid var(--signal); border-bottom: 1px solid var(--signal); opacity: .4; }
.reader-number { color: var(--signal); font-family: "Instrument Serif", Georgia, serif; font-size: clamp(3rem, 4.5vw, 4.5rem); letter-spacing: 0; }
.reader-index > p, .reader-nav button { font-family: "JetBrains Mono", monospace; }
.reader-content { max-width: none; padding: clamp(1.45rem, 2.5vw, 2.6rem) clamp(2rem, 4vw, 4.4rem); background: linear-gradient(rgba(23,49,47,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(23,49,47,.025) 1px, transparent 1px), var(--paper); background-size: 48px 48px; }
.reader-content > h2 { font-family: "Instrument Serif", Georgia, serif; font-size: clamp(2.5rem, 4vw, 4.6rem); font-weight: 400; letter-spacing: -.02em; }
.reader-question { margin: .75rem 0 1rem; color: #7c5038; font-family: "Instrument Serif", Georgia, serif; font-size: clamp(1.1rem, 1.55vw, 1.5rem); }
.reader-body .summary { padding: .7rem 0 .7rem 1rem; border-left: 4px solid var(--signal); font-size: .78rem; line-height: 1.4; }
.reading-columns { gap: clamp(1.6rem, 3vw, 3rem); margin-top: 1rem; }
.reading-columns h3 { margin-bottom: .55rem; font-family: "JetBrains Mono", monospace; }
.reading-columns p, .reading-columns li { color: #536560; font-size: .69rem; line-height: 1.36; }
.reading-columns p { margin-bottom: .45rem; }
.reading-columns li { padding: .34rem 0 .34rem 1rem; }
.reading-columns li::before { content: ""; top: .65rem; width: 5px; height: 5px; border: 1px solid var(--ink); border-radius: 50%; background: var(--signal); }
.reader-body blockquote { margin-top: .85rem; padding: .8rem 1rem; border: 1px solid var(--ink); background: #fdfcf7; font-family: "Instrument Serif", Georgia, serif; font-size: clamp(.9rem, 1.1vw, 1.05rem); }
.reader-body blockquote strong { color: #7c5038; font-weight: 400; }

.profile-card { border-color: var(--ink); background: #fdfcf7; box-shadow: 6px 6px 0 rgba(23,49,47,.09); }
.profile-portrait { background-color: var(--ink); background-image: radial-gradient(circle, rgba(197,235,53,.16) 1px, transparent 1.5px); background-size: 22px 22px; }
.profile-portrait span { color: var(--signal); font-family: "Instrument Serif", Georgia, serif; }
.profile-copy h3, .profile-placeholder, .explore-closing h3 { font-family: "Instrument Serif", Georgia, serif; }
.explore-closing { background: var(--ink); }
.closing-label { color: var(--signal); }
.closing-actions a:first-child { color: var(--ink); background: var(--signal); }

@media (max-width: 900px) {
  .screen { height: auto; }
  .intro { min-height: calc(100svh - 68px); }
  .board-traces { opacity: .35; }
  .approach-button { width: calc(100% - 3rem); margin: 0 1.5rem; }
  .reader-layout { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .challenge::after { display: none; }
  .challenge-grid { padding: 0; }
  .approach-button { width: calc(100% - 2rem); margin: 0 1rem; }
}

* { box-sizing: border-box; }
html { background: var(--ink); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Arial, Helvetica, sans-serif; }
button, a { color: inherit; font: inherit; }
button { border: 0; }
.skip-link { position: fixed; top: -5rem; left: 1rem; z-index: 100; padding: .75rem 1rem; background: var(--signal); }
.skip-link:focus { top: 1rem; }

.site-header {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 64px;
  padding: 0 clamp(1rem, 2vw, 2rem);
  border-bottom: 1px solid var(--ink);
  background: var(--paper);
}
.brand { display: inline-flex; align-items: center; gap: .65rem; width: max-content; font: 800 .72rem/1 monospace; letter-spacing: .04em; text-decoration: none; text-transform: uppercase; }
.brand-symbol { display: grid; width: 25px; height: 25px; grid-template-columns: repeat(3, 1fr); gap: 2px; transform: skewY(-13deg); }
.brand-symbol i { background: var(--ink); }
.brand-symbol i:nth-child(2) { background: var(--signal); border: 1px solid var(--ink); }
.header-thesis { font: 700 .62rem/1 monospace; letter-spacing: .08em; text-transform: uppercase; }
.header-thesis i { margin: 0 .6rem; color: #74776f; font-style: normal; }
.contact-link { justify-self: end; font: 700 .63rem/1 monospace; text-decoration: none; text-transform: uppercase; }
.contact-link span { margin-left: .35rem; }

.screen { display: grid; grid-template-columns: minmax(380px, 42%) 1fr; height: calc(100dvh - 64px); min-height: 620px; }
.intro { display: flex; min-width: 0; flex-direction: column; justify-content: space-between; border-right: 1px solid var(--ink); }
.intro-top { padding: clamp(1.5rem, 3.6vh, 3.5rem) clamp(1.5rem, 3vw, 3.6rem) 1.5rem; }
.kicker { margin: 0 0 clamp(1rem, 2vh, 1.7rem); font: 700 .61rem/1.35 monospace; letter-spacing: .08em; text-transform: uppercase; }
.pulse { display: inline-block; width: 7px; height: 7px; margin-right: .5rem; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px rgba(199,255,53,.18); }
h1 { max-width: 740px; margin: 0; font-size: clamp(2.5rem, 4.1vw, 5rem); font-weight: 500; line-height: .96; letter-spacing: -.055em; }
h1 em { font-family: Georgia, 'Times New Roman', serif; font-weight: 400; }
.intro-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1.5rem; max-width: 780px; margin-top: clamp(1.5rem, 3vh, 2.8rem); }
.intro-copy p { margin: 0; color: #4d5049; font-size: clamp(.78rem, .82vw, .96rem); line-height: 1.45; }
.intro-copy p:first-child { color: var(--ink); }
.intro-copy p:last-child { grid-column: 1 / -1; margin-top: .9rem; padding-top: .9rem; border-top: 1px solid var(--line); font-weight: 700; }
.intro-bottom { border-top: 1px solid var(--ink); }
.approach-button { display: flex; width: 100%; align-items: center; justify-content: space-between; padding: 1rem clamp(1.5rem, 3vw, 3.6rem); cursor: pointer; background: var(--signal); text-align: left; }
.approach-button small { display: block; margin-bottom: .25rem; font: 700 .58rem/1 monospace; text-transform: uppercase; }
.approach-button span { font-size: clamp(.9rem, 1.1vw, 1.15rem); font-weight: 700; }
.approach-button > b { font: 700 .58rem/1 monospace; text-transform: uppercase; }
.approach-button i { margin-left: .45rem; font-style: normal; }
.people-strip { display: grid; grid-template-columns: auto 1fr 1fr; gap: 1rem; align-items: center; padding: .8rem clamp(1.5rem, 3vw, 3.6rem); }
.people-strip > span { font: 700 .56rem/1 monospace; text-transform: uppercase; }
.people-strip p { margin: 0; font: .56rem/1.35 monospace; }
.people-strip b { display: block; }

.atlas { display: grid; min-width: 0; grid-template-rows: auto 1fr; background: #dcdcd4; }
.atlas-header { display: flex; align-items: end; justify-content: space-between; padding: clamp(1rem, 2vh, 1.5rem) clamp(1rem, 2vw, 2rem); border-bottom: 1px solid var(--ink); }
.atlas-header .kicker { margin-bottom: .3rem; }
.atlas-header h2 { margin: 0; font-size: clamp(1.5rem, 2.2vw, 2.5rem); font-weight: 500; letter-spacing: -.045em; }
.atlas-header > p { margin: 0; font: 700 .57rem/1 monospace; text-transform: uppercase; }
.atlas-header > p span { margin-left: .4rem; }
.challenge-grid { display: grid; min-height: 0; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; }
.challenge { --accent: var(--signal); position: relative; display: flex; min-width: 0; min-height: 0; flex-direction: column; padding: clamp(1rem, 2.2vw, 2.1rem); overflow: hidden; cursor: pointer; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); background: var(--paper); text-align: left; isolation: isolate; }
.challenge:nth-child(even) { border-right: 0; }
.challenge:nth-child(n+3) { border-bottom: 0; }
.challenge-grid-connection { --accent: var(--blue); }
.challenge-buildings { --accent: var(--orange); }
.challenge-data { --accent: var(--purple); }
.challenge::before { content: ''; position: absolute; z-index: -1; inset: 0; background: var(--accent); transform: translateY(calc(100% - 7px)); transition: transform .35s cubic-bezier(.2,.8,.2,1); }
.challenge:hover::before, .challenge:focus-visible::before { transform: translateY(0); }
.challenge-meta { display: flex; align-items: center; justify-content: space-between; font: 700 .57rem/1 monospace; text-transform: uppercase; }
.challenge-meta b { display: grid; width: 28px; height: 28px; place-items: center; border: 1px solid var(--ink); border-radius: 50%; }
.challenge-meta i { color: #70736b; font-style: normal; }
.challenge:hover .challenge-meta i { color: var(--ink); }
.challenge-title { margin-top: auto; font-size: clamp(1.5rem, 2.4vw, 3rem); font-weight: 500; line-height: .95; letter-spacing: -.05em; }
.challenge-question { max-width: 520px; margin-top: .7rem; font-family: Georgia, serif; font-size: clamp(.85rem, 1.1vw, 1.2rem); font-style: italic; line-height: 1.25; }
.challenge-action { display: flex; justify-content: space-between; margin-top: clamp(.8rem, 2vh, 1.5rem); padding-top: .7rem; border-top: 1px solid var(--ink); font: 700 .56rem/1 monospace; text-transform: uppercase; }
.signal-line { position: absolute; top: 50%; right: -14%; z-index: -1; width: 55%; height: 1px; background: var(--accent); transform: rotate(-28deg); transition: opacity .2s; }
.challenge:hover .signal-line { opacity: 0; }

.reader { width: 100%; max-width: none; height: 100%; max-height: none; margin: 0; padding: 0; border: 0; color: var(--ink); background: var(--paper); }
.reader::backdrop { background: rgba(16,18,14,.65); }
.reader[open] { animation: reader-in .32s ease-out; }
@keyframes reader-in { from { opacity: 0; transform: translateY(2rem); } }
.reader-shell { min-height: 100%; }
.reader-header { position: sticky; top: 0; z-index: 5; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; height: 64px; padding: 0 2rem; border-bottom: 1px solid var(--ink); background: rgba(239,238,231,.95); backdrop-filter: blur(10px); }
.reader-progress { height: 2px; overflow: hidden; background: #c5c5be; }
.reader-progress i { display: block; width: 38%; height: 100%; background: var(--signal); }
.close-reader { justify-self: end; cursor: pointer; background: transparent; font: 700 .62rem/1 monospace; text-transform: uppercase; }
.close-reader span { display: inline-grid; width: 27px; height: 27px; margin-left: .7rem; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font-size: 1rem; }
.reader-layout { display: grid; grid-template-columns: minmax(220px, 22%) 1fr; min-height: calc(100vh - 64px); }
.reader-index { position: sticky; top: 64px; align-self: start; min-height: calc(100vh - 64px); padding: clamp(2rem, 4vw, 4rem) 2rem; border-right: 1px solid var(--ink); background-color: var(--ink); background-image: linear-gradient(rgba(239,238,231,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(239,238,231,.07) 1px, transparent 1px); background-size: 34px 34px; color: var(--paper); }
.reader-number { color: var(--signal); font: clamp(4rem, 8vw, 9rem)/.8 monospace; letter-spacing: -.08em; }
.reader-index > p { margin: 1rem 0 3rem; color: #a9aca3; font: 700 .6rem/1 monospace; text-transform: uppercase; }
.reader-nav { display: grid; border-top: 1px solid rgba(239,238,231,.3); }
.reader-nav button { padding: .8rem 0; cursor: pointer; border-bottom: 1px solid rgba(239,238,231,.3); color: #a9aca3; background: transparent; font: .58rem/1 monospace; text-align: left; text-transform: uppercase; }
.reader-nav button:hover, .reader-nav button.active { color: var(--signal); }
.reader-content { width: min(100%, 1100px); padding: clamp(3rem, 7vw, 7rem); }
.reader-content > .kicker { color: #676a62; }
.reader-content > h2 { max-width: 900px; margin: 0; font-size: clamp(3.5rem, 7vw, 8rem); font-weight: 500; line-height: .9; letter-spacing: -.06em; }
.reader-question { max-width: 900px; margin: 2rem 0 3rem; font: italic clamp(1.4rem, 2.6vw, 2.8rem)/1.15 Georgia, serif; }
.reader-body .summary { max-width: 850px; padding: 1.4rem 0 1.4rem 1.5rem; border-left: 7px solid var(--signal); font-size: 1.1rem; font-weight: 700; line-height: 1.45; }
.reading-columns { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); margin-top: 3.5rem; }
.reading-columns h3 { margin: 0 0 1.5rem; padding-bottom: .7rem; border-bottom: 1px solid var(--ink); font: 700 .65rem/1 monospace; text-transform: uppercase; }
.reading-columns p, .reading-columns li { color: #40433c; line-height: 1.55; }
.reading-columns ul { margin: 0; padding: 0; list-style: none; }
.reading-columns li { position: relative; padding: .8rem 0 .8rem 1.5rem; border-bottom: 1px solid var(--line); }
.reading-columns li::before { content: '↳'; position: absolute; left: 0; color: #777a72; }
.reader-body blockquote { margin: 4rem 0 0; padding: 2rem; background: var(--signal); font-family: Georgia, serif; font-size: clamp(1.3rem, 2vw, 2rem); font-style: italic; line-height: 1.3; }
.reader-actions { display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; }
.reader-actions a { padding: 1rem 1.2rem; color: var(--paper); background: var(--ink); font: 700 .6rem/1 monospace; text-decoration: none; text-transform: uppercase; }

@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .header-thesis { display: none; }
  .screen { display: block; height: auto; min-height: 0; }
  .intro { min-height: calc(100svh - 64px); border-right: 0; border-bottom: 1px solid var(--ink); }
  .intro-copy { font-size: 1rem; }
  .atlas { min-height: 100svh; }
  .challenge-grid { min-height: 760px; }
  .reader-layout { grid-template-columns: 1fr; }
  .reader-index { position: static; min-height: auto; padding: 1rem; border-right: 0; }
  .reader-number, .reader-index > p { display: none; }
  .reader-nav { display: flex; overflow-x: auto; border: 0; }
  .reader-nav button { min-width: max-content; padding: .7rem 1rem; border: 1px solid rgba(239,238,231,.3); border-right: 0; }
}

@media (max-width: 600px) {
  .site-header, .reader-header { padding: 0 1rem; }
  .reader-brand span:last-child { display: none; }
  h1 { font-size: 3.1rem; }
  .intro-copy { grid-template-columns: 1fr; }
  .intro-copy p + p { margin-top: .7rem; }
  .intro-copy p:last-child { grid-column: 1; }
  .people-strip { grid-template-columns: 1fr; }
  .atlas-header > p { display: none; }
  .challenge-grid { display: block; min-height: 0; }
  .challenge { min-height: 310px; border-right: 0; border-bottom: 1px solid var(--ink) !important; }
  .reading-columns { grid-template-columns: 1fr; }
  .reader-content { padding: 3rem 1.3rem; }
  .reader-content > h2 { font-size: 3.5rem; }
}

@media (max-height: 720px) and (min-width: 901px) {
  .intro-top { padding-top: 1.3rem; }
  h1 { font-size: clamp(2.3rem, 3.7vw, 4.1rem); }
  .intro-copy { margin-top: 1.3rem; }
  .intro-copy p { font-size: .74rem; }
  .people-strip { padding-top: .55rem; padding-bottom: .55rem; }
  .challenge { padding: 1rem 1.3rem; }
  .challenge-title { font-size: clamp(1.4rem, 2vw, 2.3rem); }
}

@media (prefers-reduced-motion: reduce) {
  .reader[open] { animation: none; }
  .challenge::before { transition: none; }
}

/* Version E: centered popup treatment */
.reader {
  width: min(1180px, calc(100vw - 3rem));
  height: min(780px, calc(100dvh - 3rem));
  max-width: 1180px;
  max-height: 780px;
  margin: auto;
  overflow: hidden;
  border: 1px solid var(--ink);
  box-shadow: 0 24px 80px rgba(16, 18, 14, .38);
}
.reader::backdrop {
  background: rgba(16, 18, 14, .58);
  backdrop-filter: blur(3px);
}
.reader[open] { animation: popup-in .22s ease-out; }
@keyframes popup-in {
  from { opacity: 0; transform: translateY(1rem) scale(.985); }
}
.reader-shell { height: 100%; min-height: 0; overflow: hidden; }
.reader-header { position: relative; height: 54px; padding: 0 1.25rem; }
.reader-layout {
  height: calc(100% - 54px);
  min-height: 0;
  grid-template-columns: 190px minmax(0, 1fr);
}
.reader-index {
  position: relative;
  top: auto;
  min-height: 0;
  height: 100%;
  padding: 1.6rem 1.2rem;
  overflow: hidden;
}
.reader-number { font-size: clamp(3.5rem, 6vw, 6rem); }
.reader-index > p { margin: .7rem 0 1.8rem; }
.reader-nav button { padding: .62rem 0; font-size: .53rem; }
.reader-content {
  width: auto;
  max-width: none;
  height: 100%;
  padding: clamp(1.5rem, 3vw, 2.7rem);
  overflow: auto;
  overscroll-behavior: contain;
}
.reader-content > h2 {
  max-width: none;
  font-size: clamp(2.5rem, 4.5vw, 4.6rem);
  line-height: .92;
}
.reader-question {
  max-width: 820px;
  margin: 1rem 0 1.4rem;
  font-size: clamp(1.1rem, 1.8vw, 1.7rem);
}
.reader-body .summary {
  max-width: none;
  padding: .85rem 0 .85rem 1rem;
  border-left-width: 5px;
  font-size: .86rem;
  line-height: 1.35;
}
.reading-columns {
  gap: clamp(1.2rem, 2.5vw, 2.5rem);
  margin-top: 1.4rem;
}
.reading-columns h3 { margin-bottom: .75rem; padding-bottom: .5rem; font-size: .58rem; }
.reading-columns p,
.reading-columns li { font-size: .76rem; line-height: 1.35; }
.reading-columns p { margin: 0 0 .6rem; }
.reading-columns li { padding: .48rem 0 .48rem 1.2rem; }
.reader-body blockquote {
  margin: 1.4rem 0 0;
  padding: 1rem 1.2rem;
  font-size: clamp(.95rem, 1.4vw, 1.25rem);
}
.reader-actions { margin-top: 1rem; }

@media (max-width: 900px) {
  .reader {
    width: calc(100vw - 1.5rem);
    height: calc(100dvh - 1.5rem);
    max-height: none;
  }
  .reader-layout { grid-template-columns: 1fr; overflow: auto; }
  .reader-index { height: auto; overflow: visible; }
  .reader-content { height: auto; overflow: visible; }
}

@media (max-width: 600px) {
  .reader { width: 100%; height: 100%; max-width: none; margin: 0; border: 0; }
}


/* Version F: unnumbered team section */
.profiles-expanded {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.4rem;
}
.profile-card {
  display: grid;
  grid-template-columns: minmax(110px, .62fr) 1fr;
  min-height: 220px;
  border: 1px solid var(--ink);
}
.profile-portrait {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--signal);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(239,238,231,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(239,238,231,.08) 1px, transparent 1px);
  background-size: 24px 24px;
  font: clamp(2.3rem, 4vw, 4.2rem)/1 monospace;
}
.profile-portrait i {
  position: absolute;
  width: 150%;
  border-top: 1px solid var(--signal);
  transform: rotate(-32deg);
}
.profile-copy { display: flex; min-width: 0; flex-direction: column; padding: 1.2rem; }
.profile-copy .profile-label {
  margin: 0 0 auto;
  color: #73766e;
  font: 700 .53rem/1 monospace;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.profile-copy h3 {
  margin: 1.2rem 0 .45rem;
  padding: 0;
  border: 0;
  font: 500 clamp(1.5rem, 2.3vw, 2.3rem)/1 Arial, Helvetica, sans-serif;
  letter-spacing: -.045em;
  text-transform: none;
}
.profile-copy .profile-role {
  min-height: 2.4em;
  margin: 0 0 .8rem;
  font: 700 .56rem/1.4 monospace;
  text-transform: uppercase;
}
.profile-copy .profile-placeholder { color: #686b63; font-style: italic; }
.profile-copy a {
  width: max-content;
  margin-top: auto;
  font: 700 .55rem/1 monospace;
  text-decoration: none;
  text-transform: uppercase;
}
.team-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1rem;
  padding: .9rem 1rem;
  background: var(--signal);
}
.team-contact p { margin: 0; font-size: .8rem; }
.team-contact a { font: 700 .56rem/1 monospace; text-decoration: none; text-transform: uppercase; }

@media (max-width: 700px) {
  .profiles-expanded { grid-template-columns: 1fr; }
  .profile-card { grid-template-columns: 110px 1fr; }
}


/* Version G: restored closing invitation */
.explore-closing {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: clamp(1rem, 3vw, 3rem);
  margin-top: 1rem;
  padding: 1.15rem;
  color: var(--paper);
  background: var(--ink);
}
.explore-closing .closing-label {
  margin: 0 0 .8rem;
  color: var(--signal);
  font: 700 .52rem/1 monospace;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.explore-closing h3 {
  margin: 0;
  padding: 0;
  border: 0;
  font: 500 clamp(1.7rem, 2.8vw, 2.8rem)/.98 Arial, Helvetica, sans-serif;
  letter-spacing: -.05em;
  text-transform: none;
}
.closing-copy p {
  margin: 0 0 .65rem;
  color: #c9cbc4;
  font-size: .73rem;
  line-height: 1.4;
}
.closing-copy p strong { color: var(--paper); }
.closing-actions { display: flex; gap: .6rem; margin-top: .9rem; flex-wrap: wrap; }
.closing-actions a {
  padding: .7rem .85rem;
  color: var(--ink);
  background: var(--signal);
  font: 700 .52rem/1 monospace;
  text-decoration: none;
  text-transform: uppercase;
}
.closing-actions a:last-child {
  color: var(--paper);
  background: transparent;
  border: 1px solid rgba(240,239,232,.45);
}

@media (max-width: 700px) {
  .explore-closing { grid-template-columns: 1fr; }
}

/* Compact only the Who we are popup; challenge panels retain their existing scale. */
@media (min-width: 901px) {
  .reader[data-panel="people"] .reader-content {
    padding: 1.55rem 2.1rem;
    overflow: hidden;
  }

  .reader[data-panel="people"] .reader-content > .kicker {
    margin-bottom: .6rem;
  }

  .reader[data-panel="people"] .reader-content > h2 {
    max-width: none;
    font-size: clamp(2.9rem, 4vw, 4.25rem);
    line-height: .96;
  }

  .reader[data-panel="people"] .reader-question {
    margin: .7rem 0 1rem;
    font-size: clamp(1.2rem, 1.6vw, 1.55rem);
    line-height: 1.15;
  }

  .reader[data-panel="people"] .reader-body .summary {
    padding: .7rem 0 .7rem .9rem;
    border-left-width: 5px;
    font-size: .82rem;
    line-height: 1.3;
  }

  .reader[data-panel="people"] .profiles-expanded {
    gap: .9rem;
    margin-top: .95rem;
  }

  .reader[data-panel="people"] .profile-card {
    grid-template-columns: 125px 1fr;
    min-height: 195px;
  }

  .reader[data-panel="people"] .profile-copy {
    padding: .95rem;
  }

  .reader[data-panel="people"] .profile-copy h3 {
    margin: .75rem 0 .35rem;
    font-size: clamp(1.45rem, 2vw, 1.95rem);
  }

  .reader[data-panel="people"] .profile-copy .profile-role {
    min-height: 0;
    margin-bottom: .55rem;
    font-size: .53rem;
  }

  .reader[data-panel="people"] .profile-copy .profile-placeholder {
    margin-bottom: .45rem;
    font-size: .72rem;
    line-height: 1.25;
  }

  .reader[data-panel="people"] .explore-closing {
    grid-template-columns: .65fr 1.35fr;
    gap: 1.3rem;
    margin-top: .85rem;
    padding: .95rem 1.05rem;
  }

  .reader[data-panel="people"] .explore-closing .closing-label {
    margin-bottom: .55rem;
  }

  .reader[data-panel="people"] .explore-closing h3 {
    font-size: clamp(1.6rem, 2.25vw, 2.2rem);
  }

  .reader[data-panel="people"] .closing-copy p {
    margin-bottom: .42rem;
    font-size: .68rem;
    line-height: 1.32;
  }

  .reader[data-panel="people"] .closing-actions {
    margin-top: .6rem;
  }

  .reader[data-panel="people"] .closing-actions a {
    padding: .6rem .75rem;
    font-size: .51rem;
  }
}


/* Version H: dark energy-intelligence theme inspired by intelligra.ai */
:root {
  --h-bg: #081113;
  --h-bg-2: #0b1719;
  --h-panel: rgba(17, 34, 37, .82);
  --h-panel-solid: #102124;
  --h-panel-deep: #0a1618;
  --h-text: #edf7f5;
  --h-text-2: #a7c0bd;
  --h-text-3: #6f8b88;
  --h-line: rgba(119, 211, 207, .14);
  --h-line-2: rgba(119, 211, 207, .27);
  --h-cyan: #42d6d1;
  --h-mint: #43df9c;
  --h-gold: #ffd75a;
  --h-blue: #6d96ff;
  --h-gradient: linear-gradient(100deg, var(--h-cyan), var(--h-mint));
}

html { background: var(--h-bg); }
body {
  color: var(--h-text);
  background:
    radial-gradient(ellipse 48% 60% at 78% 30%, rgba(66,214,209,.11), transparent 70%),
    radial-gradient(ellipse 34% 44% at 8% 88%, rgba(67,223,156,.07), transparent 72%),
    var(--h-bg);
  font-family: 'DM Sans', Arial, sans-serif;
}
h1, h2, h3, .challenge-title { font-family: 'Figtree', Arial, sans-serif; }
.kicker, .brand, .header-thesis, .contact-link,
.challenge-meta, .challenge-action, .brief-head, .brief-label,
.people-strip, .reader-nav button, .reader-index > p,
.profile-label, .profile-role, .profile-copy a,
.closing-label, .closing-actions a {
  font-family: 'JetBrains Mono', monospace !important;
}

.site-header {
  height: 70px;
  padding: 0 clamp(1rem, 2.4vw, 2.5rem);
  border-color: var(--h-line);
  background: rgba(8,17,19,.8);
  backdrop-filter: blur(18px);
}
.brand { color: var(--ink); }
.brand-symbol {
  padding: 3px;
  border: 1px solid var(--h-line-2);
  border-radius: 8px;
  transform: none;
}
.brand-symbol i { border-radius: 2px; background: var(--h-text-3); }
.brand-symbol i:nth-child(2) {
  border: 0;
  background: var(--h-gradient);
  box-shadow: 0 0 14px rgba(66,214,209,.35);
}
.header-thesis { color: var(--h-text-3); }
.header-thesis i { color: var(--h-cyan); }
.contact-link {
  padding: .7rem 1rem;
  border: 1px solid var(--h-line-2);
  border-radius: 999px;
  color: var(--ink);
  transition: border-color .2s, background .2s, transform .2s;
}
.contact-link:hover {
  border-color: var(--h-cyan);
  background: rgba(66,214,209,.08);
  transform: translateY(-2px);
}

.screen {
  height: calc(100dvh - 70px);
  min-height: 650px;
  gap: 16px;
  padding: 16px;
}
.intro {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--h-line);
  border-radius: 24px;
  background:
    linear-gradient(var(--h-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--h-line) 1px, transparent 1px),
    var(--h-panel);
  background-size: 56px 56px;
  box-shadow: inset 0 1px rgba(255,255,255,.025);
}
.intro::before {
  content: '';
  position: absolute;
  inset: -30% -20% auto auto;
  width: 75%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(66,214,209,.1);
  filter: blur(70px);
  pointer-events: none;
}
.intro-top, .intro-bottom { position: relative; z-index: 1; }
.kicker { color: var(--h-cyan); }
.pulse {
  background: var(--h-mint);
  box-shadow: 0 0 0 4px rgba(67,223,156,.12), 0 0 16px rgba(67,223,156,.45);
}
h1 {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -.045em;
}
h1 em {
  display: inline;
  color: transparent;
  background: var(--h-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  font-family: 'Figtree', Arial, sans-serif;
  font-weight: 400;
  font-style: normal;
}
.intro-copy p { color: var(--h-text-2); }
.intro-copy p:first-child, .intro-copy p:last-child { color: var(--h-text); }
.intro-copy p:last-child, .intro-bottom { border-color: var(--h-line); }
.approach-button {
  margin: 12px;
  width: calc(100% - 24px);
  padding: .9rem 1.2rem;
  border-radius: 14px;
  color: #081315;
  background: var(--h-gradient);
  box-shadow: 0 10px 30px rgba(66,214,209,.15);
  transition: transform .2s, box-shadow .2s;
}
.approach-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(66,214,209,.24);
}
.people-strip { color: var(--h-text-3); }
.people-strip b { color: var(--ink); }

.atlas { background: transparent; }
.atlas-header {
  padding: .8rem .5rem 1rem;
  border: 0;
}
.atlas-header h2 { color: var(--ink); font-weight: 800; }
.atlas-header > p { color: var(--h-text-3); }
.challenge-grid { gap: 14px; }
.challenge {
  --accent: var(--h-cyan);
  border: 1px solid var(--h-line);
  border-radius: 20px;
  color: var(--ink);
  background: linear-gradient(150deg, rgba(18,37,40,.94), rgba(11,24,27,.92));
  box-shadow: inset 0 1px rgba(255,255,255,.02);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.challenge:nth-child(even),
.challenge:nth-child(n+3) { border: 1px solid var(--h-line); }
.challenge-grid-connection { --accent: var(--h-gold); }
.challenge-buildings { --accent: var(--h-mint); }
.challenge-data { --accent: var(--h-blue); }
.challenge::before {
  inset: auto -70px -100px auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: var(--accent);
  filter: blur(70px);
  opacity: .09;
  transform: none;
  transition: opacity .3s;
}
.challenge:hover,
.challenge:focus-visible {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 48%, transparent);
  box-shadow: 0 18px 48px rgba(0,0,0,.24);
}
.challenge:hover::before, .challenge:focus-visible::before {
  transform: none;
  opacity: .2;
}
.challenge-meta b {
  border-color: color-mix(in srgb, var(--accent) 46%, transparent);
  color: var(--ink);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}
.challenge-meta i { color: var(--h-text-3); }
.challenge:hover .challenge-meta i { color: var(--h-text-2); }
.challenge-title { color: var(--accent); font-weight: 800; letter-spacing: -.035em; }
.challenge-question { color: var(--h-text-2); font-family: 'DM Sans', sans-serif; font-style: normal; }
.challenge-action {
  border-color: var(--h-line);
  color: var(--h-text-3);
}
.challenge-action b { color: var(--accent); }
.signal-line { display: none; }

.reader {
  color: var(--ink);
  background: var(--h-bg-2);
  border-color: var(--h-line-2);
  border-radius: 24px;
  box-shadow: 0 28px 100px rgba(0,0,0,.58), 0 0 0 1px rgba(66,214,209,.05);
}
.reader::backdrop {
  background: rgba(2,7,8,.72);
  backdrop-filter: blur(8px);
}
.reader-header {
  border-color: var(--h-line);
  background: rgba(9,20,22,.94);
}
.reader-progress { background: rgba(119,211,207,.12); }
.reader-progress i { background: var(--h-gradient); }
.close-reader { color: var(--ink); }
.close-reader span { border-color: var(--h-line-2); }
.reader-layout { background: var(--h-bg-2); }
.reader-index {
  border-color: var(--h-line);
  color: var(--h-text);
  background-color: var(--h-panel-deep);
  background-image:
    linear-gradient(var(--h-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--h-line) 1px, transparent 1px);
}
.reader-number { color: var(--h-cyan); text-shadow: 0 0 28px rgba(66,214,209,.2); }
.reader-index > p { color: var(--h-text-3); }
.reader-nav { border-color: var(--h-line); }
.reader-nav button {
  border-color: var(--h-line);
  color: var(--h-text-3);
}
.reader-nav button:hover, .reader-nav button.active { color: var(--h-cyan); }
.reader-content > .kicker { color: #7c5038; }
.reader-content > h2 { color: var(--ink); font-weight: 800; }
.reader-question {
  color: var(--h-text-2);
  font-family: 'DM Sans', sans-serif;
  font-style: normal;
  font-weight: 300;
}
.reader-body .summary {
  border-color: var(--h-cyan);
  border-radius: 0 12px 12px 0;
  color: var(--ink);
  background: rgba(66,214,209,.07);
}
.reading-columns h3 {
  border-color: var(--h-line-2);
  color: #7c5038;
}
.reading-columns p, .reading-columns li { color: var(--h-text-2); }
.reading-columns li { border-color: var(--h-line); }
.reading-columns li::before { color: var(--h-cyan); }
.reader-body blockquote {
  color: #081315;
  background: var(--h-gradient);
  border-radius: 14px;
  font-family: 'DM Sans', sans-serif;
  font-style: normal;
  box-shadow: 0 12px 32px rgba(66,214,209,.12);
}
.reader-actions a {
  border-radius: 999px;
  color: #081315;
  background: var(--h-gradient);
}

.profile-card {
  overflow: hidden;
  border-color: var(--h-line-2);
  border-radius: 16px;
  background: var(--h-panel);
}
.profile-portrait {
  color: var(--h-cyan);
  background-color: var(--h-panel-deep);
  background-image:
    linear-gradient(var(--h-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--h-line) 1px, transparent 1px);
}
.profile-portrait i { border-color: var(--h-cyan); }
.profile-copy .profile-label { color: #7c5038; }
.profile-copy h3 { color: var(--ink); }
.profile-copy .profile-role { color: var(--ink); }
.profile-copy .profile-placeholder { color: #536560; }
.profile-copy a { color: var(--ink); }
.explore-closing {
  border: 1px solid var(--h-line);
  border-radius: 16px;
  color: var(--h-text);
  background:
    radial-gradient(circle at 0 50%, rgba(66,214,209,.12), transparent 45%),
    var(--h-panel-deep);
}
.explore-closing .closing-label { color: var(--h-cyan); }
.explore-closing h3 { color: var(--h-text); }
.closing-copy p { color: var(--h-text-2); }
.closing-copy p strong { color: var(--h-text); }
.closing-actions a {
  border-radius: 999px;
  color: #081315;
  background: var(--h-gradient);
}
.closing-actions a:last-child {
  color: var(--h-text);
  background: transparent;
  border-color: var(--h-line-2);
}
.team-contact { border-radius: 14px; color: #081315; background: var(--h-gradient); }

@media (max-width: 900px) {
  .screen { padding: 10px; gap: 10px; }
  .intro { border-radius: 20px; }
  .challenge-grid { gap: 10px; }
}


/* Version I revision: quieter grids and subtle moving energy paths. */
.intro {
  background:
    linear-gradient(rgba(119,211,207,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(119,211,207,.032) 1px, transparent 1px),
    var(--h-panel);
  background-size: 76px 76px;
}

.reader-index {
  background-color: var(--h-panel-deep);
  background-image:
    linear-gradient(rgba(119,211,207,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(119,211,207,.032) 1px, transparent 1px);
  background-size: 58px 58px;
}

.profile-portrait {
  background-color: var(--h-panel-deep);
  background-image:
    linear-gradient(rgba(119,211,207,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(119,211,207,.028) 1px, transparent 1px);
  background-size: 40px 40px;
}

.challenge {
  background-color: var(--h-panel);
  background-image:
    linear-gradient(rgba(119,211,207,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(119,211,207,.018) 1px, transparent 1px),
    linear-gradient(150deg, rgba(18,37,40,.96), rgba(11,24,27,.94));
  background-size: 68px 68px, 68px 68px, auto;
}

.challenge > span {
  position: relative;
  z-index: 2;
}

.challenge::after {
  content: '';
  position: absolute;
  z-index: 1;
  top: 19%;
  right: -18%;
  width: 72%;
  height: 68%;
  border: 1px dashed var(--accent);
  border-left-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
  opacity: .14;
  transform: rotate(-18deg);
  animation: energy-orbit 22s linear infinite;
  pointer-events: none;
}

.challenge:nth-child(2)::after { animation-duration: 26s; animation-direction: reverse; }
.challenge:nth-child(3)::after { animation-duration: 24s; }
.challenge:nth-child(4)::after { animation-duration: 29s; animation-direction: reverse; }

.challenge:hover::after,
.challenge:focus-visible::after {
  opacity: .24;
}

@keyframes energy-orbit {
  to { transform: rotate(342deg); }
}

@media (prefers-reduced-motion: reduce) {
  .challenge::after { animation: none; }
}


/* Version J: quieter hierarchy and more breathing room. */
@media (min-width: 901px) {
  .screen {
    gap: 20px;
    padding: 18px;
  }

  .intro-top {
    padding: clamp(2rem, 4.2vh, 3.7rem) clamp(1.8rem, 3.2vw, 3.8rem) 1.4rem;
  }

  h1 {
    max-width: 700px;
    font-size: clamp(2.8rem, 3.55vw, 4.4rem);
    line-height: .99;
  }

  .intro-copy {
    margin-top: clamp(1.3rem, 2.2vh, 2rem);
  }

  .atlas-header h2 {
    font-size: clamp(1.5rem, 1.9vw, 2.2rem);
  }

  .atlas-header > p {
    display: none;
  }

  .challenge-grid {
    gap: 18px;
  }

  .challenge {
    padding: clamp(1.25rem, 2.1vw, 2.2rem);
  }

  .challenge-title {
    color: var(--accent);
    font-size: clamp(1.45rem, 2vw, 2.55rem);
    letter-spacing: -.03em;
  }

  .challenge-question {
    max-width: 470px;
    font-size: clamp(.82rem, .95vw, 1.05rem);
    line-height: 1.35;
  }
}

.intro {
  background:
    linear-gradient(rgba(119,211,207,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(119,211,207,.018) 1px, transparent 1px),
    var(--h-panel);
  background-size: 88px 88px;
}
.intro::before {
  background: rgba(66,214,209,.055);
  filter: blur(92px);
}

.challenge {
  border-color: rgba(119,211,207,.105);
  background-image:
    linear-gradient(rgba(119,211,207,.009) 1px, transparent 1px),
    linear-gradient(90deg, rgba(119,211,207,.009) 1px, transparent 1px),
    linear-gradient(150deg, rgba(18,37,40,.96), rgba(11,24,27,.94));
}
.challenge:nth-child(even),
.challenge:nth-child(n+3) {
  border-color: rgba(119,211,207,.105);
}
.challenge::before { opacity: .05; }
.challenge:hover::before,
.challenge:focus-visible::before { opacity: .13; }

.challenge::after { opacity: .065; }
.challenge:hover::after,
.challenge:focus-visible::after { opacity: .16; }

.challenge-action {
  color: rgba(169,193,191,.58);
}
.challenge-meta i {
  color: rgba(169,193,191,.55);
}
.people-strip { opacity: .78; }
.approach-button { box-shadow: 0 8px 22px rgba(66,214,209,.1); }

/* Quieter challenge popups; the custom About popup remains unchanged. */
@media (min-width: 901px) {
  .reader:not([data-panel="people"]) .reader-layout {
    grid-template-columns: 170px minmax(0, 1fr);
  }

  .reader:not([data-panel="people"]) .reader-index {
    padding: 1.35rem 1rem;
  }

  .reader:not([data-panel="people"]) .reader-number {
    font-size: clamp(3rem, 4.5vw, 4.5rem);
  }

  .reader:not([data-panel="people"]) .reader-index > p {
    margin: .55rem 0 1.25rem;
  }

  .reader:not([data-panel="people"]) .reader-nav button {
    padding: .52rem 0;
  }

  .reader:not([data-panel="people"]) .reader-content {
    padding: 1.45rem 2rem;
  }

  .reader:not([data-panel="people"]) .reader-content > .kicker {
    margin-bottom: .5rem;
  }

  .reader:not([data-panel="people"]) .reader-content > h2 {
    font-size: clamp(2.2rem, 3.4vw, 3.5rem);
    line-height: .96;
  }

  .reader:not([data-panel="people"]) .reader-question {
    max-width: 760px;
    margin: .7rem 0 1rem;
    font-size: clamp(1rem, 1.45vw, 1.35rem);
    line-height: 1.25;
  }

  .reader:not([data-panel="people"]) .reader-body .summary {
    padding: .65rem 0 .65rem .85rem;
    font-size: .78rem;
    line-height: 1.3;
  }

  .reader:not([data-panel="people"]) .reading-columns {
    gap: 1.5rem;
    margin-top: .9rem;
  }

  .reader:not([data-panel="people"]) .reading-columns h3 {
    margin-bottom: .55rem;
  }

  .reader:not([data-panel="people"]) .reading-columns p,
  .reader:not([data-panel="people"]) .reading-columns li {
    font-size: .7rem;
    line-height: 1.3;
  }

  .reader:not([data-panel="people"]) .reading-columns p {
    margin-bottom: .45rem;
  }

  .reader:not([data-panel="people"]) .reading-columns li {
    padding: .34rem 0 .34rem 1rem;
  }

  .reader:not([data-panel="people"]) .reader-body blockquote {
    margin-top: .8rem;
    padding: .75rem .95rem;
    font-size: clamp(.85rem, 1.1vw, 1rem);
  }
}

/* Version K — an editorial circuit board, deliberately flat and tactile. */
:root {
  --ink: #17312f;
  --paper: #f8f6ee;
  --signal: #c5eb35;
  --copper: #ae6b42;
  --blue: #557e9a;
  --orange: #d6a42c;
  --purple: #4ab69d;
  --line: rgba(23, 49, 47, .2);
}

html { background: #e9e6db; }
body {
  color: var(--ink);
  background: #e9e6db;
  font-family: "DM Sans", Arial, sans-serif;
}

.site-header {
  position: relative;
  z-index: 20;
  height: 68px;
  padding: 0 clamp(1.2rem, 2.4vw, 2.6rem);
  background: rgba(248,246,238,.96);
}
.site-header::after { content: ""; position: absolute; right: 0; bottom: -5px; left: 0; height: 1px; background: rgba(23,49,47,.3); }
.brand { font-family: "JetBrains Mono", monospace; }
.brand-symbol { width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; gap: 3px; border: 1px solid var(--ink); border-radius: 50%; transform: none; }
.brand-symbol i { width: 3px; height: 15px; transform: rotate(27deg); }
.header-thesis, .contact-link { font-family: "JetBrains Mono", monospace; }
.header-thesis i { color: var(--copper); }
.contact-link { padding: .68rem 1rem; border: 1px solid var(--ink); transition: .18s ease; }
.contact-link:hover, .contact-link:focus-visible { color: var(--paper); background: var(--ink); }

.screen { grid-template-columns: minmax(380px, 42%) 1fr; height: calc(100dvh - 68px); min-height: 650px; }
.intro {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(90deg, transparent calc(100% - 22px), rgba(174,107,66,.16) calc(100% - 22px), rgba(174,107,66,.16) calc(100% - 21px), transparent calc(100% - 21px)),
    radial-gradient(circle, rgba(23,49,47,.1) 1px, transparent 1.4px),
    var(--paper);
  background-size: auto, 26px 26px, auto;
}
.intro::before { content: ""; position: absolute; top: 92px; right: -1px; width: 105px; height: 74px; border-top: 2px solid var(--copper); border-left: 2px solid var(--copper); border-radius: 24px 0 0; opacity: .7; }
.intro::after { content: ""; position: absolute; top: 85px; right: 96px; width: 12px; height: 12px; border: 2px solid var(--copper); border-radius: 50%; background: var(--paper); }
.intro-top, .intro-bottom { position: relative; z-index: 1; }
.intro-top { padding-top: clamp(2.2rem, 4.2vh, 4rem); }
.kicker { color: #7c5038; font-family: "JetBrains Mono", monospace; letter-spacing: .12em; }
.pulse { border: 1px solid var(--ink); box-shadow: 0 0 0 4px var(--paper), 0 0 0 5px rgba(23,49,47,.18); }
h1 { max-width: 720px; font-family: "Instrument Serif", Georgia, serif; font-size: clamp(3rem, 4.3vw, 5.25rem); font-weight: 400; line-height: .91; letter-spacing: -.025em; }
h1 em { color: #7c5038; font-family: inherit; }
.intro-copy { padding-top: 1rem; border-top: 1px solid rgba(23,49,47,.25); }
.intro-copy p { color: #576864; font-size: clamp(.76rem, .82vw, .92rem); }
.intro-copy p:first-child { color: #576864; }
.intro-copy p:last-child { padding: .2rem 0 .2rem 1rem; border-top: 0; border-left: 3px solid var(--signal); color: var(--ink); }
.intro-bottom { border-top: 0; }
.approach-button { margin: 0 clamp(1.5rem, 3vw, 3.6rem); width: calc(100% - clamp(3rem, 6vw, 7.2rem)); padding: .9rem 1rem; border: 1px solid var(--ink); border-left: 8px solid var(--signal); background: #fdfcf6; box-shadow: 7px 7px 0 rgba(23,49,47,.09); transition: .18s ease; }
.approach-button:hover, .approach-button:focus-visible { transform: translate(-2px,-2px); box-shadow: 10px 10px 0 rgba(23,49,47,.1); }
.approach-button span { font-family: "Instrument Serif", Georgia, serif; font-size: clamp(1.08rem, 1.35vw, 1.4rem); font-weight: 400; }
.approach-button small, .approach-button > b { font-family: "JetBrains Mono", monospace; }
.approach-button small { color: #7c5038; }
.people-strip { padding-top: 1rem; color: #5d6b67; font-family: "JetBrains Mono", monospace; }
.people-strip > span { color: #7c5038; }
.people-strip p { font-family: inherit; }

.atlas { position: relative; isolation: isolate; background: linear-gradient(rgba(23,49,47,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(23,49,47,.035) 1px, transparent 1px), #e9e6db; background-size: 52px 52px; }
.board-traces { position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .55; }
.board-traces svg { width: 100%; height: 100%; }
.board-traces .trace { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.board-traces .trace-copper { stroke: var(--copper); }
.board-traces .trace-green { stroke: #4ab69d; }
.board-traces .trace-blue { stroke: var(--blue); }
.board-traces .trace-faint { stroke: rgba(23,49,47,.22); stroke-dasharray: 4 8; }
.board-traces circle { fill: #e9e6db; stroke: var(--copper); stroke-width: 2; vector-effect: non-scaling-stroke; }
.board-traces circle:first-of-type { fill: var(--signal); stroke: var(--ink); }
.atlas-header { padding: clamp(1.2rem, 2.4vh, 2rem) clamp(1.3rem, 2.4vw, 2.5rem); border-bottom: 0; }
.atlas-header h2 { font-family: "Instrument Serif", Georgia, serif; font-size: clamp(2rem, 2.8vw, 3.2rem); font-weight: 400; letter-spacing: -.02em; }
.atlas-header > p { color: #66736f; font-family: "JetBrains Mono", monospace; }
.atlas-header > p span { color: var(--copper); }
.challenge-grid { gap: clamp(1.1rem, 1.7vw, 1.8rem); padding: 0 clamp(1.3rem, 2.4vw, 2.5rem) clamp(1.3rem, 2.4vw, 2.5rem); }
.challenge, .challenge:nth-child(even), .challenge:nth-child(n+3) { border: 1px solid var(--ink); background: rgba(250,249,243,.95); box-shadow: 7px 7px 0 rgba(23,49,47,.1); overflow: visible; transition: .18s ease; }
.challenge { --accent: var(--copper); padding: clamp(1rem, 1.7vw, 1.65rem); }
.challenge-grid-connection { --accent: var(--orange); }
.challenge-buildings { --accent: var(--purple); }
.challenge-data { --accent: var(--blue); }
.challenge::before { inset: 8px; border: 1px solid rgba(23,49,47,.09); background: transparent; transform: none; opacity: 1; }
.challenge::after { content: ""; position: absolute; top: 24%; right: -11px; width: 20px; height: 7px; border: 1px solid var(--ink); background: var(--accent); box-shadow: 0 17px 0 #e9e6db, 0 17px 0 1px var(--ink), 0 34px 0 var(--accent), 0 34px 0 1px var(--ink); opacity: 1; }
.challenge:hover, .challenge:focus-visible { transform: translate(-3px,-3px); background: #fffef9; box-shadow: 11px 11px 0 rgba(23,49,47,.14); }
.challenge:hover::before, .challenge:focus-visible::before { transform: none; opacity: 1; }
.challenge-meta { font-family: "JetBrains Mono", monospace; }
.challenge-meta b { background: var(--accent); }
.challenge-meta i { color: #64726e; }
.challenge-title { color: var(--ink); font-family: "Instrument Serif", Georgia, serif; font-size: clamp(1.75rem, 2.35vw, 2.85rem); font-weight: 400; letter-spacing: -.015em; }
.challenge-question { color: #576864; font-family: "DM Sans", Arial, sans-serif; font-size: clamp(.75rem, .86vw, .92rem); font-style: normal; line-height: 1.38; }
.challenge-action { border-color: rgba(23,49,47,.3); color: #65736f; font-family: "JetBrains Mono", monospace; }
.challenge-action b { color: var(--accent); }
.signal-line { top: -12px; left: 22%; width: 8px; height: 23px; border: 1px solid var(--ink); background: var(--accent); transform: none; opacity: 1; }
.challenge:hover .signal-line { opacity: 1; }

.reader { border: 1px solid var(--ink); background: var(--paper); box-shadow: 18px 18px 0 rgba(23,49,47,.24); }
.reader::backdrop { background: rgba(19,34,32,.72); }
.reader-header { background: rgba(248,246,238,.97); }
.reader-progress { background: rgba(23,49,47,.15); }
.reader-progress i { background: var(--signal); }
.reader-layout { grid-template-columns: 180px minmax(0,1fr); }
.reader-index { background-color: var(--ink); background-image: radial-gradient(circle, rgba(197,235,53,.15) 1px, transparent 1.5px); background-size: 24px 24px; }
.reader-index::after { content: ""; position: absolute; top: 76px; right: 0; width: 45px; height: 58%; border-top: 1px solid var(--signal); border-right: 1px solid var(--signal); border-bottom: 1px solid var(--signal); opacity: .4; }
.reader-number { color: var(--signal); font-family: "Instrument Serif", Georgia, serif; font-size: clamp(3rem, 4.5vw, 4.5rem); letter-spacing: 0; }
.reader-index > p, .reader-nav button { font-family: "JetBrains Mono", monospace; }
.reader-content { max-width: none; padding: clamp(1.45rem, 2.5vw, 2.6rem) clamp(2rem, 4vw, 4.4rem); background: linear-gradient(rgba(23,49,47,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(23,49,47,.025) 1px, transparent 1px), var(--paper); background-size: 48px 48px; }
.reader-content > h2 { font-family: "Instrument Serif", Georgia, serif; font-size: clamp(2.5rem, 4vw, 4.6rem); font-weight: 400; letter-spacing: -.02em; }
.reader-question { margin: .75rem 0 1rem; color: #7c5038; font-family: "Instrument Serif", Georgia, serif; font-size: clamp(1.1rem, 1.55vw, 1.5rem); }
.reader-body .summary { padding: .7rem 0 .7rem 1rem; border-left: 4px solid var(--signal); font-size: .78rem; line-height: 1.4; }
.reading-columns { gap: clamp(1.6rem, 3vw, 3rem); margin-top: 1rem; }
.reading-columns h3 { margin-bottom: .55rem; font-family: "JetBrains Mono", monospace; }
.reading-columns p, .reading-columns li { color: #536560; font-size: .69rem; line-height: 1.36; }
.reading-columns p { margin-bottom: .45rem; }
.reading-columns li { padding: .34rem 0 .34rem 1rem; }
.reading-columns li::before { content: ""; top: .65rem; width: 5px; height: 5px; border: 1px solid var(--ink); border-radius: 50%; background: var(--signal); }
.reader-body blockquote { margin-top: .85rem; padding: .8rem 1rem; border: 1px solid var(--ink); background: #fdfcf7; font-family: "Instrument Serif", Georgia, serif; font-size: clamp(.9rem, 1.1vw, 1.05rem); }
.reader-body blockquote strong { color: #7c5038; font-weight: 400; }

.profile-card { border-color: var(--ink); background: #fdfcf7; box-shadow: 6px 6px 0 rgba(23,49,47,.09); }
.profile-portrait { background-color: var(--ink); background-image: radial-gradient(circle, rgba(197,235,53,.16) 1px, transparent 1.5px); background-size: 22px 22px; }
.profile-portrait span { color: var(--signal); font-family: "Instrument Serif", Georgia, serif; }
.profile-copy h3, .profile-placeholder, .explore-closing h3 { font-family: "Instrument Serif", Georgia, serif; }
.explore-closing { background: var(--ink); }
.closing-label { color: var(--signal); }
.closing-actions a:first-child { color: var(--ink); background: var(--signal); }

@media (max-width: 900px) {
  .screen { height: auto; }
  .intro { min-height: calc(100svh - 68px); }
  .board-traces { opacity: .35; }
  .approach-button { width: calc(100% - 3rem); margin: 0 1.5rem; }
  .reader-layout { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .challenge::after { display: none; }
  .challenge-grid { padding: 0; }
  .approach-button { width: calc(100% - 2rem); margin: 0 1rem; }
}