:root {
  color-scheme: dark;
  --ink: #eef3f1;
  --muted: #9faead;
  --faint: #667675;
  --bg: #071015;
  --panel: #0d181e;
  --panel-2: #111f26;
  --line: rgba(213, 230, 225, 0.16);
  --line-strong: rgba(213, 230, 225, 0.38);
  --electric: #74e7d4;
  --electric-dark: #0ea98f;
  --amber: #f4bd65;
  --danger: #ef785f;
  --max: 1500px;
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --base-size: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: var(--base-size);
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px),
    var(--bg);
  background-size: 48px 48px;
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body[data-text-size="large"] { --base-size: 18px; }
body[data-text-size="largest"] { --base-size: 20px; }
body.is-locked { overflow: hidden; }

body.high-contrast {
  --ink: #fff;
  --muted: #e5ecea;
  --faint: #c7d2cf;
  --bg: #000;
  --panel: #070707;
  --panel-2: #0c0c0c;
  --line: rgba(255,255,255,.35);
  --line-strong: rgba(255,255,255,.75);
  --electric: #90ffe9;
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
iframe:focus-visible {
  outline: 3px solid var(--electric);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-180%);
  padding: .75rem 1rem;
  color: #071015;
  background: var(--electric);
  text-decoration: none;
  font-weight: 800;
}

.skip-link:focus { transform: none; }

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.35rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,.2);
}

.wordmark {
  display: grid;
  grid-template-columns: 2.3rem auto;
  grid-template-rows: auto auto;
  width: max-content;
  text-decoration: none;
  line-height: 1;
}

.wordmark > span {
  grid-row: 1 / 3;
  display: grid;
  place-items: center;
  width: 2.3rem;
  height: 2.3rem;
  margin-right: .75rem;
  border: 1px solid currentColor;
  font: 700 .7rem/1 var(--mono);
  letter-spacing: .12em;
}

.wordmark strong {
  align-self: end;
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.wordmark small {
  align-self: start;
  margin-top: .25rem;
  color: rgba(255,255,255,.7);
  font: italic .72rem/1 var(--serif);
}

.site-header nav {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.5rem);
}

.site-header nav a,
.settings-button {
  border: 0;
  color: rgba(255,255,255,.78);
  background: transparent;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .68rem;
  font-weight: 700;
  cursor: pointer;
}

.site-header nav a:hover,
.settings-button:hover { color: #fff; }

.settings-button {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.settings-button span {
  font-size: 1rem;
  color: var(--electric);
}

.hero {
  position: relative;
  min-height: min(920px, 100svh);
  display: grid;
  grid-template-rows: 1fr auto;
  overflow: hidden;
}

.hero-media,
.hero-scrim {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.75) contrast(1.08);
  transform: scale(1.02);
}

.hero-scrim {
  background:
    linear-gradient(90deg, rgba(3,10,14,.93) 0%, rgba(3,10,14,.78) 40%, rgba(3,10,14,.26) 74%, rgba(3,10,14,.55) 100%),
    linear-gradient(0deg, rgba(3,10,14,.95), transparent 45%);
}

.hero-content {
  position: relative;
  z-index: 2;
  align-self: center;
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 9rem 2rem 5rem;
}

.eyebrow {
  margin: 0 0 1.2rem;
  color: var(--electric);
  font: 700 .68rem/1.25 var(--mono);
  text-transform: uppercase;
  letter-spacing: .18em;
}

.hero h1 {
  max-width: 940px;
  margin: 0;
  font-size: clamp(4.2rem, 10vw, 10rem);
  line-height: .78;
  letter-spacing: -.07em;
  text-transform: uppercase;
}

.hero h1 em {
  color: var(--electric);
  font-family: var(--serif);
  font-weight: 400;
  text-transform: none;
}

.hero-deck {
  max-width: 670px;
  margin: 2.5rem 0 0;
  color: rgba(255,255,255,.83);
  font-size: clamp(1.1rem, 1.8vw, 1.4rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 2.3rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-width: 240px;
  gap: 1.5rem;
  padding: 1rem 1.15rem;
  border: 1px solid rgba(255,255,255,.4);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-size: .68rem;
  font-weight: 800;
  cursor: pointer;
}

.button--primary {
  border-color: var(--electric);
  color: #06110f;
  background: var(--electric);
}

.button--ghost { background: rgba(0,0,0,.25); }

.hero-system-strip {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  width: calc(100% - 4rem);
  margin: 0 auto;
  padding: 1.4rem 0 1.8rem;
  border-top: 1px solid rgba(255,255,255,.22);
  color: rgba(255,255,255,.76);
  font: 700 .67rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .15em;
}

.hero-system-strip i {
  flex: 1;
  color: var(--electric);
  font-style: normal;
  text-align: center;
}

.energy-brief,
.field-study,
.power-story,
.systems-map,
.pue-section,
.field-notes,
.sources {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(5rem, 9vw, 9rem) 2rem;
}

.energy-brief {
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: clamp(3rem, 8vw, 8rem);
}

.section-intro h2,
.field-heading h2,
.power-heading h2,
.systems-heading h2,
.pue-section h2,
.field-notes h2,
.sources h2 {
  margin: 0;
  max-width: 820px;
  font: 400 clamp(2.8rem, 5vw, 5.8rem)/.96 var(--serif);
  letter-spacing: -.045em;
}

.section-intro > p:last-child,
.field-heading > p,
.power-heading > p,
.systems-heading > p,
.pue-section > div > p,
.field-notes > div > p {
  color: var(--muted);
  font-size: 1.05rem;
}

.energy-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}

.energy-facts article {
  display: flex;
  min-height: 310px;
  flex-direction: column;
  padding: 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.energy-facts article:first-child { border-left: 1px solid var(--line); }

.energy-facts strong {
  color: var(--electric);
  font: 400 clamp(2rem, 3.5vw, 4rem)/1 var(--serif);
}

.energy-facts span {
  margin-top: .65rem;
  font: 700 .69rem/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: .12em;
}

.energy-facts p {
  margin: auto 0 1.2rem;
  color: var(--muted);
  font-size: .86rem;
}

.energy-facts a,
.pue-section a {
  color: var(--electric);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  text-underline-offset: .25rem;
}

.source-note {
  grid-column: 2;
  margin: -4rem 0 0;
  color: var(--faint);
  font-size: .75rem;
}

.field-study {
  max-width: none;
  padding-inline: max(2rem, calc((100vw - var(--max)) / 2));
  background: #e9eeeb;
  color: #0b1618;
}

.field-study .eyebrow { color: #167d6c; }

.field-heading {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 4rem;
  align-items: end;
}

.field-heading > p {
  max-width: 620px;
  color: #4d5e5d;
}

.chapter-tabs {
  display: flex;
  gap: .55rem;
  margin: 3.5rem 0 1rem;
  padding-bottom: .4rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.chapter-tabs button {
  flex: 0 0 auto;
  padding: .75rem .95rem;
  border: 1px solid #afbbb6;
  border-radius: 999px;
  color: #53625f;
  background: transparent;
  font: 700 .65rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
  cursor: pointer;
}

.chapter-tabs button[aria-selected="true"] {
  border-color: #10211f;
  color: #eafff8;
  background: #10211f;
}

.experience-shell {
  display: grid;
  grid-template-columns: minmax(220px, .7fr) minmax(480px, 2.2fr) minmax(330px, 1fr);
  min-height: 760px;
  border: 1px solid #b7c1bd;
  background: #f6f8f6;
}

.stop-rail {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border-right: 1px solid #c6ceca;
  background: #dfe6e2;
}

.stop-rail-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1rem;
  border-bottom: 1px solid #c3ccc8;
  color: #5e6a67;
  font: 700 .61rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
}

.stop-rail-heading strong { color: #14221f; }

.stop-list {
  overflow: auto;
  scrollbar-width: thin;
}

.stop-card {
  width: 100%;
  display: grid;
  grid-template-columns: 2.2rem 56px 1fr;
  gap: .75rem;
  align-items: center;
  padding: .7rem;
  border: 0;
  border-bottom: 1px solid #c6ceca;
  color: #263532;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.stop-card[hidden] { display: none; }

.stop-card:hover { background: rgba(255,255,255,.5); }

.stop-card.is-active {
  color: #071713;
  background: #fff;
  box-shadow: inset 3px 0 #0ea98f;
}

.stop-card.is-complete .stop-number {
  color: #fff;
  background: #157b69;
}

.stop-number {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border: 1px solid #9ca9a4;
  border-radius: 50%;
  font: 700 .62rem/1 var(--mono);
}

.stop-card img {
  width: 56px;
  height: 42px;
  object-fit: cover;
  filter: saturate(.7);
}

.stop-card span:last-child {
  min-width: 0;
}

.stop-card strong,
.stop-card small {
  display: block;
}

.stop-card strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .76rem;
}

.stop-card small {
  margin-top: .2rem;
  color: #6f7c78;
  font: 700 .53rem/1.2 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.viewer-column {
  display: flex;
  min-width: 0;
  flex-direction: column;
  background: #091115;
}

.viewer-frame {
  position: relative;
  min-height: 690px;
  flex: 1;
}

.viewer-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: #071015;
}

.viewer-label {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .6rem .8rem;
  color: #fff;
  background: rgba(4,11,15,.82);
  backdrop-filter: blur(10px);
  pointer-events: none;
}

.viewer-label span {
  color: var(--electric);
  font: 700 .62rem/1 var(--mono);
}

.viewer-label strong {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.viewer-fullscreen {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid rgba(255,255,255,.45);
  color: #fff;
  background: rgba(4,11,15,.82);
  cursor: pointer;
}

.viewer-navigation {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
  padding: .8rem;
  border-top: 1px solid rgba(255,255,255,.16);
}

.viewer-navigation button {
  width: 100%;
  padding: .65rem 1rem;
  border: 1px solid rgba(255,255,255,.22);
  color: #dbe5e1;
  background: transparent;
  text-transform: uppercase;
  letter-spacing: .09em;
  font-size: .62rem;
  cursor: pointer;
}

.viewer-navigation button:last-child { justify-self: end; }
.viewer-navigation button:disabled { opacity: .35; cursor: not-allowed; }

.viewer-navigation p {
  margin: 0;
  color: #82918f;
  font: .57rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.story-panel {
  min-width: 0;
  padding: 1.4rem;
  overflow: auto;
  color: #24302f;
  background: #fff;
}

.story-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: #27806f;
  font: 700 .59rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
}

.story-meta button {
  padding: .55rem .7rem;
  border: 1px solid #b8c4bf;
  color: #3e504c;
  background: transparent;
  font-size: .58rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  cursor: pointer;
}

.story-panel h3 {
  margin: 1.2rem 0 .7rem;
  font: 400 clamp(2rem, 3vw, 3.6rem)/.98 var(--serif);
  letter-spacing: -.035em;
}

.story-lead {
  padding-bottom: 1.3rem;
  border-bottom: 1px solid #d8dedb;
  color: #455451;
  font-size: 1rem;
}

.story-block {
  padding: 1.1rem 0;
  border-bottom: 1px solid #e1e5e3;
}

.story-block h4 {
  margin: 0 0 .5rem;
  color: #63716e;
  font: 700 .59rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .1em;
}

.story-block p,
.story-block ul {
  margin: 0;
  font-size: .87rem;
}

.story-block ul {
  padding-left: 1.1rem;
}

.story-block li + li { margin-top: .35rem; }

.story-question {
  margin: 1rem 0;
  padding: 1rem;
  border: 0;
  color: #e6f8f3;
  background: #132b27;
}

.story-question h4 { color: var(--electric); }

.story-actions {
  display: grid;
  gap: .65rem;
}

.story-actions button,
.story-actions a {
  padding: .75rem .85rem;
  border: 1px solid #aebbb7;
  color: #23332f;
  background: transparent;
  text-align: left;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .59rem;
  font-weight: 800;
  cursor: pointer;
}

.story-actions button.is-complete {
  border-color: #157b69;
  color: #fff;
  background: #157b69;
}

.power-story {
  max-width: none;
  padding-inline: max(2rem, calc((100vw - var(--max)) / 2));
  background: #0a151b;
}

.power-heading {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 4rem;
  align-items: end;
  max-width: var(--max);
  margin: 0 auto;
}

.power-path {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  max-width: var(--max);
  margin: 4rem auto 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
  list-style: none;
}

.power-path li {
  position: relative;
  display: flex;
  min-height: 330px;
  flex-direction: column;
  padding: 1.35rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.power-path li:first-child { border-left: 1px solid var(--line); }

.power-path li > span {
  color: var(--electric);
  font: 700 .61rem/1 var(--mono);
}

.power-path strong {
  margin-top: 1.5rem;
  font: 400 1.5rem/1.1 var(--serif);
}

.power-path p {
  color: var(--muted);
  font-size: .85rem;
}

.power-path button,
.system-grid button {
  margin-top: auto;
  padding: .7rem 0;
  border: 0;
  border-top: 1px solid var(--line);
  color: var(--electric);
  background: transparent;
  text-align: left;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .59rem;
  font-weight: 700;
  cursor: pointer;
}

.redundancy-lab {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 4rem;
  max-width: var(--max);
  margin: 5rem auto 0;
  padding: 3rem;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.025);
}

.redundancy-lab h3 {
  margin: 0;
  font: 400 clamp(2rem, 4vw, 4.3rem)/.95 var(--serif);
}

.redundancy-lab > div:first-child > p:last-child {
  color: var(--muted);
}

.redundancy-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .8rem;
}

.redundancy-cards article {
  padding: 1.2rem;
  color: #0a1717;
  background: #dfe9e5;
}

.redundancy-cards strong {
  color: #0b7a66;
  font: 400 2.8rem/1 var(--serif);
}

.redundancy-cards p { font-size: .79rem; }

.caution {
  grid-column: 2;
  margin: -2.5rem 0 0;
  color: var(--faint);
  font-size: .74rem;
}

.systems-map {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: clamp(3rem, 8vw, 8rem);
}

.systems-heading {
  position: sticky;
  top: 2rem;
  align-self: start;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line-strong);
}

.system-grid article {
  display: flex;
  min-height: 300px;
  flex-direction: column;
  padding: 1.4rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.system-grid article:nth-child(odd) { border-left: 1px solid var(--line); }

.system-grid article > span {
  color: var(--electric);
  font: 700 .61rem/1 var(--mono);
}

.system-grid h3 {
  margin: 1.4rem 0 .5rem;
  font: 400 1.9rem/1 var(--serif);
}

.system-grid p {
  color: var(--muted);
  font-size: .84rem;
}

.pue-section {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .72fr);
  gap: clamp(3rem, 8vw, 8rem);
  padding-inline: max(2rem, calc((100vw - var(--max)) / 2));
  color: #0c1717;
  background: var(--electric);
}

.pue-section .eyebrow { color: #0b6e5c; }
.pue-section > div > p { max-width: 760px; color: #2e4b46; }
.pue-section a { color: #0b5e50; }

.formula {
  display: grid;
  grid-template-columns: 1fr;
  width: min(100%, 420px);
  margin: 2.2rem 0 !important;
  color: #091715 !important;
  font: 700 .78rem/1.2 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.formula i {
  height: 2px;
  margin: .45rem 0;
  background: #102d28;
}

.formula strong {
  margin-top: .65rem;
  font-size: 1.4rem;
}

.pue-calculator {
  align-self: center;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  color: var(--ink);
  background: #0a1719;
  box-shadow: 0 2rem 5rem rgba(0,0,0,.22);
}

.pue-calculator h3 {
  margin: 0 0 2rem;
  font: 400 2.2rem/1 var(--serif);
}

.pue-calculator label {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .79rem;
}

.pue-calculator input {
  width: 7rem;
  padding: .5rem;
  border: 1px solid var(--line-strong);
  color: #fff;
  background: transparent;
  text-align: right;
}

.pue-calculator output {
  display: block;
  margin-top: 1.7rem;
  color: var(--electric);
  font: 400 clamp(2.8rem, 5vw, 5rem)/1 var(--serif);
}

.pue-calculator p,
.pue-calculator small {
  color: var(--muted);
}

.pue-calculator small {
  display: block;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: .7rem;
}

.field-notes {
  max-width: none;
  padding-inline: max(2rem, calc((100vw - var(--max)) / 2));
  color: #172220;
  background: #e9eeeb;
}

.field-notes .eyebrow { color: #167d6c; }
.field-notes > div > p { color: #53615e; }

.prompt-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 3.5rem;
}

.prompt-grid label {
  display: grid;
  gap: .7rem;
  padding: 1.2rem;
  border: 1px solid #b6c0bc;
  background: #f7f9f7;
}

.prompt-grid span {
  font: 700 .65rem/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.prompt-grid textarea {
  min-height: 140px;
  padding: 1rem;
  border: 1px solid #c2cbc7;
  resize: vertical;
  color: #1a2926;
  background: #fff;
  font: .9rem/1.5 var(--sans);
}

.notes-actions {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-top: 1rem;
}

.notes-actions p {
  margin-right: auto;
  color: #697571;
  font-size: .75rem;
}

.notes-actions button {
  padding: .75rem 1rem;
  border: 1px solid #889993;
  color: #1e302b;
  background: transparent;
  font: 700 .62rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  cursor: pointer;
}

.sources {
  display: grid;
  grid-template-columns: .65fr 1.35fr;
  gap: 5rem;
}

.source-list {
  border-top: 1px solid var(--line-strong);
}

.source-list a {
  display: grid;
  grid-template-columns: 8rem 1fr;
  gap: .4rem 1.5rem;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.source-list span {
  grid-row: 1 / 3;
  color: var(--electric);
  font: 700 .6rem/1.5 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.source-list strong {
  font: 400 1.15rem/1.2 var(--serif);
}

.source-list small {
  color: var(--muted);
}

.archive-note {
  grid-column: 2;
  margin: -3rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: .73rem;
}

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem;
  border-top: 1px solid var(--line);
}

footer p {
  color: var(--faint);
  font-size: .75rem;
}

footer > a:last-child {
  justify-self: end;
  color: var(--electric);
  font: 700 .63rem/1 var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.wordmark--footer small { color: var(--muted); }

.settings-panel {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 100;
  width: min(440px, 92vw);
  height: 100svh;
  padding: 2rem;
  border-left: 1px solid var(--line-strong);
  background: var(--panel);
  box-shadow: -2rem 0 5rem rgba(0,0,0,.35);
  transform: translateX(105%);
  transition: transform .28s ease;
}

.settings-panel.is-open { transform: translateX(0); }

.settings-panel > div:first-child {
  position: relative;
  padding-right: 3rem;
}

.settings-panel h2 {
  margin: 0 0 2.5rem;
  font: 400 2.5rem/1 var(--serif);
}

.settings-close {
  position: absolute;
  top: 0;
  right: 0;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  background: transparent;
  font-size: 1.4rem;
  cursor: pointer;
}

.settings-panel > label {
  display: grid;
  gap: .7rem;
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .8rem;
}

.settings-panel select {
  padding: .8rem;
  border: 1px solid var(--line-strong);
  color: var(--ink);
  background: var(--panel-2);
}

.settings-panel .toggle-row {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.toggle-row strong,
.toggle-row small {
  display: block;
}

.toggle-row strong { color: var(--ink); }
.toggle-row small { margin-top: .2rem; color: var(--faint); }
.toggle-row input { width: 1.3rem; height: 1.3rem; accent-color: var(--electric-dark); }

.settings-reset {
  width: 100%;
  margin-top: 1.5rem;
  padding: .8rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .62rem;
  font-weight: 800;
  cursor: pointer;
}

.settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0,0,0,.64);
  backdrop-filter: blur(3px);
}

@media (max-width: 1180px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .experience-shell {
    grid-template-columns: 180px minmax(420px, 1.8fr) minmax(310px, 1fr);
  }
  .energy-brief,
  .systems-map,
  .sources {
    grid-template-columns: 1fr;
  }
  .source-note,
  .archive-note { grid-column: 1; margin-top: 0; }
  .systems-heading { position: static; }
}

@media (max-width: 900px) {
  .hero-system-strip i { display: none; }
  .energy-facts { grid-template-columns: 1fr; }
  .energy-facts article { min-height: 220px; }
  .field-heading,
  .power-heading,
  .pue-section {
    grid-template-columns: 1fr;
  }
  .experience-shell {
    grid-template-columns: 1fr;
  }
  .stop-rail {
    border-right: 0;
    border-bottom: 1px solid #c6ceca;
  }
  .stop-list {
    display: flex;
    overflow-x: auto;
  }
  .stop-card {
    flex: 0 0 240px;
    border-right: 1px solid #c6ceca;
  }
  .viewer-frame { min-height: 62svh; }
  .story-panel { max-height: none; }
  .power-path { grid-template-columns: repeat(2, 1fr); }
  .redundancy-lab { grid-template-columns: 1fr; padding: 2rem; }
  .caution { grid-column: 1; margin: 0; }
}

@media (max-width: 640px) {
  .site-header,
  .hero-content,
  .energy-brief,
  .field-study,
  .power-story,
  .systems-map,
  .pue-section,
  .field-notes,
  .sources {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .hero h1 { font-size: clamp(3.6rem, 19vw, 6rem); }
  .hero-deck { font-size: 1rem; }
  .hero-system-strip {
    width: calc(100% - 2rem);
    overflow-x: auto;
  }
  .button { width: 100%; }
  .energy-facts article:first-child { border-left: 0; }
  .viewer-frame { min-height: 55svh; }
  .viewer-navigation {
    grid-template-columns: 1fr 1fr;
  }
  .viewer-navigation p { display: none; }
  .power-path,
  .system-grid,
  .redundancy-cards,
  .prompt-grid {
    grid-template-columns: 1fr;
  }
  .power-path li,
  .system-grid article {
    min-height: 235px;
    border-left: 1px solid var(--line);
  }
  .notes-actions { align-items: stretch; flex-direction: column; }
  .notes-actions p { margin-right: 0; }
  .source-list a { grid-template-columns: 1fr; }
  .source-list span { grid-row: auto; }
  footer { grid-template-columns: 1fr; }
  footer > a:last-child { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

body.reduce-motion {
  scroll-behavior: auto;
}

body.reduce-motion *,
body.reduce-motion *::before,
body.reduce-motion *::after {
  scroll-behavior: auto !important;
  animation-duration: .01ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: .01ms !important;
}

@media print {
  :root { color-scheme: light; }
  body { color: #000; background: #fff; }
  .site-header,
  .hero,
  .energy-brief,
  .field-study,
  .power-story,
  .systems-map,
  .pue-section,
  .sources,
  footer,
  .settings-panel,
  .settings-backdrop,
  .notes-actions button {
    display: none !important;
  }
  .field-notes {
    display: block;
    padding: 0;
    color: #000;
    background: #fff;
  }
  .prompt-grid { grid-template-columns: 1fr; }
  .prompt-grid label { break-inside: avoid; border-color: #777; }
  .prompt-grid textarea {
    min-height: 180px;
    border-color: #999;
    color: #000;
  }
}