:root {
  --ink: #08110f;
  --ink-soft: #14201d;
  --paper: #f4f2e9;
  --paper-bright: #faf9f2;
  --muted: #68716c;
  --line: rgba(8, 17, 15, 0.16);
  --lime: #c6ff5d;
  --mint: #48ead0;
  --white: #ffffff;
  --max: 1240px;
  --radius: 26px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--lime);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  min-height: 72px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(244, 242, 233, 0.88);
  backdrop-filter: blur(18px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  font-size: 14px;
  font-weight: 850;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.wordmark span span {
  color: #5b756e;
}

.wordmark-mark {
  width: 18px;
  height: 18px;
  border: 5px solid var(--ink);
  border-right-color: var(--mint);
  border-radius: 50%;
  transform: rotate(-28deg);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.site-header nav a,
.header-link {
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.site-header nav a {
  color: #35413d;
}

.site-header nav a:hover,
.header-link:hover {
  color: #007b6c;
}

.header-link {
  justify-self: end;
  display: inline-flex;
  gap: 6px;
}

.hero {
  max-width: var(--max);
  min-height: calc(100vh - 72px);
  margin: 0 auto;
  padding: 76px 24px 64px;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(400px, 0.88fr);
  align-items: center;
  gap: clamp(44px, 7vw, 108px);
}

.eyebrow,
.section-kicker {
  display: flex;
  align-items: center;
  gap: 9px;
  color: #4f5c57;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #66c900;
  box-shadow: 0 0 0 5px rgba(102, 201, 0, 0.13);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin: 22px 0 26px;
  font-size: clamp(58px, 7vw, 108px);
  font-weight: 880;
  line-height: 0.88;
  letter-spacing: -0.076em;
}

h1 em {
  display: block;
  color: #52605b;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -0.065em;
}

.hero-deck {
  max-width: 660px;
  margin-bottom: 30px;
  color: #384640;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.42;
  letter-spacing: -0.025em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 0 21px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--ink);
  color: var(--white);
}

.button-primary:hover {
  background: #17332c;
}

.button-secondary:hover {
  background: var(--white);
}

.authors {
  max-width: 600px;
  margin: 32px 0 0;
  color: #6b756f;
  font-size: 12px;
  line-height: 1.6;
}

.authors sup,
.affiliations sup {
  color: #007b6c;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.7em;
  font-weight: 800;
}

.affiliations {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 18px;
  margin: 5px 0 0;
  color: #85908a;
  font-size: 10px;
  line-height: 1.5;
}

.rotation-card {
  position: relative;
  overflow: hidden;
  min-height: 600px;
  padding: 22px;
  border-radius: 34px;
  background:
    linear-gradient(rgba(255,255,255,0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.055) 1px, transparent 1px),
    var(--ink);
  background-size: 34px 34px;
  color: var(--white);
  box-shadow: 0 30px 70px rgba(8, 17, 15, 0.2);
}

.rotation-card::after {
  content: "";
  position: absolute;
  inset: auto -110px -160px auto;
  width: 330px;
  height: 330px;
  border-radius: 50%;
  background: var(--mint);
  filter: blur(110px);
  opacity: 0.13;
}

.rotation-card-top,
.rotation-card-bottom {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: #a9b9b3;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.live-dot {
  display: flex;
  align-items: center;
  gap: 7px;
}

.live-dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
}

.rope-controls {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 30px 0 22px;
  padding: 17px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(3, 9, 7, 0.48);
}

.rope-control label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 9px;
  color: #b7c4bf;
  font-size: 11px;
  font-weight: 750;
}

.rope-control output {
  color: var(--lime);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.rope-control input[type="range"] {
  width: 100%;
  height: 4px;
  margin: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.15);
  accent-color: var(--lime);
  appearance: none;
  cursor: pointer;
}

.rope-control input[type="range"]::-webkit-slider-thumb {
  width: 15px;
  height: 15px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 1px var(--lime);
  -webkit-appearance: none;
}

.rope-control input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 1px var(--lime);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 7px;
  color: #62736c;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 7px;
}

.frequency-axis {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: #7d8e87;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 7px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.frequency-axis i {
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--lime), var(--mint));
}

.frequency-axis b {
  margin-left: 8px;
  color: #596861;
  font-weight: 600;
}

.rope-pair-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 5px;
}

.rope-pair {
  min-width: 0;
  height: 58px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 2px;
  padding: 4px 2px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.035);
  color: #53645d;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.rope-pair:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.28);
}

.rope-pair.active {
  border-color: color-mix(in srgb, var(--pair-color), transparent 48%);
  background: color-mix(in srgb, var(--pair-color), transparent 90%);
  color: #c9d7d1;
}

.rope-pair.selected {
  box-shadow: 0 0 0 1px var(--pair-color), 0 0 16px color-mix(in srgb, var(--pair-color), transparent 76%);
}

.pair-orbit {
  position: relative;
  width: 22px;
  height: 22px;
  border: 1px solid currentColor;
  border-radius: 50%;
  opacity: 0.8;
}

.pair-orbit::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
}

.pair-orbit i {
  position: absolute;
  top: calc(50% - 1px);
  left: 50%;
  width: 9px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transform: rotate(var(--pair-angle));
  transform-origin: left center;
}

.rope-pair.active .pair-orbit {
  color: var(--pair-color);
}

.rope-pair strong,
.rope-pair small {
  max-width: 100%;
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rope-pair strong {
  font-size: 7px;
  font-weight: 700;
}

.rope-pair small {
  color: #61716a;
  font-size: 6px;
}

.rope-pair.active small {
  color: #91a69d;
}

.rope-inspector {
  position: relative;
  z-index: 2;
  min-height: 94px;
  margin-top: 12px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: rgba(3, 9, 7, 0.55);
}

.rope-inspector > span {
  display: block;
  margin-bottom: 8px;
  color: var(--lime);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 8px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rope-inspector strong {
  display: block;
  color: #edf4f1;
  font-size: 12px;
}

.rope-inspector p {
  margin: 4px 0 0;
  color: #86978f;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 8px;
  line-height: 1.5;
}

.rope-observation {
  position: relative;
  z-index: 2;
  margin-top: 10px;
  padding: 13px 15px;
  border-left: 3px solid var(--lime);
  border-radius: 4px 12px 12px 4px;
  background: rgba(198, 255, 93, 0.08);
}

.rope-observation strong {
  display: block;
  margin-bottom: 5px;
  color: var(--lime);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rope-observation p {
  margin: 0;
  color: #a7b8b1;
  font-size: 9px;
  line-height: 1.5;
}

.rope-observation p + p {
  margin-top: 5px;
  color: #d2ded9;
}

.rotation-card-bottom {
  justify-content: space-between;
  gap: 14px;
  margin-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.11);
  padding-top: 18px;
  text-transform: none;
}

.rotation-card-bottom sup,
.rotation-card-bottom sub {
  line-height: 0;
}

.rotation-card-bottom a {
  color: var(--mint);
  text-decoration: none;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.signal-strip > div {
  min-height: 164px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 30px max(24px, calc((100vw - var(--max)) / 8));
  border-right: 1px solid var(--line);
}

.signal-strip > div:last-child {
  border-right: 0;
}

.signal-strip strong {
  font-size: clamp(32px, 3.2vw, 52px);
  line-height: 1;
  letter-spacing: -0.06em;
}

.signal-strip span {
  max-width: 190px;
  margin-top: 12px;
  color: #64706a;
  font-size: 12px;
  line-height: 1.45;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 130px 24px;
}

.opening {
  padding-bottom: 70px;
}

.opening-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: clamp(50px, 9vw, 140px);
  margin-top: 36px;
}

.opening-grid h2,
.section-heading h2,
.study h2,
.guidance h2,
.resources h2,
.context-callout h2 {
  margin-bottom: 0;
  font-size: clamp(42px, 5vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.062em;
}

.opening-grid p {
  margin-bottom: 20px;
  color: #46524d;
  font-size: 16px;
}

.model-choices {
  border-top: 1px solid var(--line);
}

.model-choice-head {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(50px, 9vw, 140px);
  align-items: end;
  margin-bottom: 56px;
}

.model-choice-head h2 {
  max-width: 760px;
  margin: 20px 0 0;
  font-size: clamp(42px, 5vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.062em;
}

.choice-summary > p {
  margin-bottom: 28px;
  color: #5b6762;
}

.choice-spectrum {
  display: flex;
  align-items: center;
  color: #4f5c57;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  font-weight: 750;
}

.choice-spectrum i {
  flex: 1;
  height: 1px;
  margin: 0 8px;
  background: var(--line);
}

.model-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(250, 249, 242, 0.7);
}

.model-table {
  width: 100%;
  min-width: 840px;
  border-collapse: collapse;
  text-align: left;
}

.model-table th {
  padding: 17px 22px;
  border-bottom: 1px solid var(--ink);
  color: #758079;
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.model-table th:nth-child(1) { width: 32%; }
.model-table th:nth-child(2) { width: 26%; }
.model-table th:nth-child(3) { width: 42%; }

.model-table td {
  padding: 22px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}

.model-table tbody tr:last-child td {
  border-bottom: 0;
}

.model-table td:first-child strong,
.model-table td:first-child span {
  display: block;
}

.model-table td:first-child strong {
  font-size: 15px;
  letter-spacing: -0.02em;
}

.model-table td:first-child span {
  margin-top: 5px;
  color: #758079;
  font-size: 11px;
}

.fraction-meter {
  display: grid;
  grid-template-columns: 1fr 42px;
  align-items: center;
  gap: 12px;
}

.fraction-meter::before {
  content: "";
  grid-column: 1;
  grid-row: 1;
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: rgba(8, 17, 15, 0.09);
}

.fraction-meter i {
  grid-column: 1;
  grid-row: 1;
  width: var(--fraction);
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mint), #83d85b);
}

.fraction-meter strong {
  grid-column: 2;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.rationale-tag {
  display: inline-flex;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #6a756f;
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rationale-limited {
  border-color: #cab165;
  color: #7c641f;
}

.rationale-default {
  border-color: #9aa39e;
  color: #59645f;
}

.rationale-explicit {
  border-color: #6ca83d;
  background: var(--lime);
  color: #314d14;
}

.model-table td:last-child p {
  max-width: 440px;
  margin: 8px 0 0;
  color: #59655f;
  font-size: 12px;
}

.model-row-accent {
  background: rgba(198, 255, 93, 0.13);
}

.model-table-note {
  margin: 14px 4px 0;
  color: #77827d;
  font-size: 10px;
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 60px;
  align-items: end;
  margin-bottom: 58px;
}

.section-heading h2 {
  margin-top: 20px;
}

.section-heading > p {
  margin: 0;
  color: #5f6b66;
}

.finding-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.finding-card {
  min-height: 490px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(250, 249, 242, 0.7);
}

.finding-card-featured {
  background: var(--ink);
  color: var(--white);
}

.finding-number {
  width: max-content;
  padding: 6px 9px;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: #708079;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
}

.finding-card-featured .finding-number {
  color: var(--lime);
}

.finding-card h3 {
  margin: 26px 0 14px;
  font-size: 27px;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.finding-card p {
  color: #52605a;
  font-size: 14px;
}

.finding-card-featured p {
  color: #b8c5c0;
}

.card-note {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: #6a756f;
  font-size: 11px;
}

.finding-card-featured .card-note {
  border-color: rgba(255, 255, 255, 0.14);
  color: #91a39c;
}

.mini-threshold {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  align-items: end;
  gap: 5px;
  height: 110px;
  margin-top: 36px;
}

.mini-threshold span {
  height: 78%;
  border-radius: 5px 5px 2px 2px;
  background: linear-gradient(180deg, var(--mint), rgba(72, 234, 208, 0.3));
}

.mini-threshold .low {
  height: 44%;
  background: rgba(255, 255, 255, 0.14);
}

.mini-threshold .threshold {
  background: linear-gradient(180deg, var(--lime), rgba(198, 255, 93, 0.3));
}

.memory-glyph {
  height: 110px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  margin-top: 36px;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
}

.memory-glyph span {
  display: flex;
  align-items: center;
  height: 31px;
  padding-left: 10px;
  border-radius: 5px;
}

.memory-full {
  width: 100%;
  background: rgba(8, 17, 15, 0.12);
}

.memory-partial {
  width: 18%;
  min-width: 55px;
  background: var(--mint);
}

.stability-glyph {
  height: 110px;
  margin-top: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: #6c7973;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
}

.stability-glyph svg {
  width: 100%;
  height: 58px;
}

.stability-glyph path {
  fill: none;
  stroke: #ff5f6d;
  stroke-width: 3;
}

.study {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: clamp(60px, 9vw, 140px);
  border-top: 1px solid var(--line);
}

.study-copy h2 {
  margin: 20px 0 28px;
}

.study-copy p {
  max-width: 480px;
  color: #5b6762;
}

.study-matrix {
  border-top: 1px solid var(--ink);
}

.matrix-row {
  min-height: 90px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.matrix-row > span {
  width: 118px;
  color: #76817c;
  font-size: 11px;
  font-weight: 750;
  text-transform: uppercase;
}

.matrix-row strong {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.42);
  font-size: 12px;
}

.matrix-row .accent-chip {
  border-color: #83ae35;
  background: var(--lime);
}

.context-callout {
  max-width: calc(var(--max) - 48px);
  margin: 0 auto 30px;
  display: grid;
  grid-template-columns: 90px 1fr 0.75fr;
  gap: 34px;
  align-items: start;
  padding: 58px;
  border-radius: 32px;
  background: var(--lime);
}

.context-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  font-size: 25px;
}

.context-callout .section-kicker {
  color: #40590f;
}

.context-callout h2 {
  margin-top: 18px;
  font-size: clamp(36px, 4.4vw, 60px);
}

.context-callout p {
  margin: 29px 0 0;
  color: #32400f;
}

.cache-growth {
  padding-top: 110px;
}

.cache-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.72fr);
  gap: clamp(50px, 9vw, 140px);
  align-items: end;
}

.cache-heading h2 {
  max-width: 780px;
  margin: 20px 0 0;
  font-size: clamp(42px, 5vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.062em;
}

.cache-method {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(250, 249, 242, 0.78);
}

.cache-method > span,
.cache-chart-meta {
  display: block;
  color: #718079;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 9px;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.cache-method code {
  display: block;
  margin: 14px 0 12px;
  color: #0d7568;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(12px, 1.4vw, 16px);
  font-weight: 750;
  letter-spacing: -0.035em;
}

.cache-method p {
  margin: 0;
  color: #64706a;
  font-size: 11px;
  line-height: 1.55;
}

.cache-chart-card {
  overflow: hidden;
  margin-top: 54px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: var(--paper-bright);
  box-shadow: 0 24px 70px rgba(8, 17, 15, 0.08);
}

.cache-chart-top {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(480px, 1.2fr);
  gap: 30px;
  align-items: center;
  padding: 28px 30px 22px;
  border-bottom: 1px solid var(--line);
}

.cache-chart-top h3 {
  margin: 9px 0 0;
  font-size: clamp(22px, 2.5vw, 34px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.cache-head-control {
  max-width: 330px;
  margin-top: 24px;
}

.cache-head-control label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 9px;
  color: #65716b;
  font-size: 10px;
  font-weight: 800;
}

.cache-head-control output {
  color: #0d7568;
  font: 850 12px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.cache-head-control input[type="range"] {
  width: 100%;
  height: 5px;
  margin: 0;
  border-radius: 999px;
  background: rgba(8, 17, 15, 0.13);
  accent-color: #0d7568;
  appearance: none;
  cursor: pointer;
}

.cache-head-control input[type="range"]::-webkit-slider-thumb {
  width: 16px;
  height: 16px;
  border: 3px solid var(--paper-bright);
  border-radius: 50%;
  background: #0d7568;
  box-shadow: 0 0 0 1px #0d7568;
  -webkit-appearance: none;
}

.cache-head-control input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  border: 3px solid var(--paper-bright);
  border-radius: 50%;
  background: #0d7568;
  box-shadow: 0 0 0 1px #0d7568;
}

.cache-head-options {
  display: flex;
  justify-content: space-between;
  margin-top: 7px;
  color: #8a948f;
  font: 650 8px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.cache-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.cache-legend button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 32px;
  padding: 0 11px;
  border: 1px solid color-mix(in srgb, var(--series-color), transparent 62%);
  border-radius: 999px;
  background: color-mix(in srgb, var(--series-color), transparent 91%);
  color: var(--ink);
  cursor: pointer;
  font: 750 10px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.cache-legend button i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--series-color);
}

.cache-legend button[aria-pressed="false"] {
  border-color: var(--line);
  background: transparent;
  color: #89928e;
  opacity: 0.64;
}

.cache-legend button[aria-pressed="false"] i {
  background: #a7afab;
}

.cache-plot-wrap {
  position: relative;
  min-height: 520px;
  padding: 16px 20px 0;
}

#cache-chart {
  display: block;
  width: 100%;
  height: auto;
  min-height: 470px;
  overflow: visible;
}

#cache-chart:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: -6px;
  border-radius: 16px;
}

.cache-grid-line {
  stroke: rgba(8, 17, 15, 0.11);
  stroke-width: 1;
}

.cache-grid-line-major {
  stroke: rgba(8, 17, 15, 0.18);
}

.cache-axis-label {
  fill: #78837e;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
}

.cache-axis-title {
  fill: #58645f;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cache-series-line {
  fill: none;
  stroke: var(--series-color);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.cache-series-point {
  fill: var(--paper-bright);
  stroke: var(--series-color);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.cache-reference-line {
  stroke: #d06c4f;
  stroke-width: 1.5;
  stroke-dasharray: 6 7;
  vector-effect: non-scaling-stroke;
}

.cache-reference-label {
  fill: #a54f38;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  font-weight: 800;
}

.cache-hover-line {
  stroke: rgba(8, 17, 15, 0.5);
  stroke-width: 1;
  stroke-dasharray: 3 4;
  pointer-events: none;
  vector-effect: non-scaling-stroke;
}

.cache-hover-point {
  fill: var(--series-color);
  stroke: var(--paper-bright);
  stroke-width: 3;
  pointer-events: none;
  vector-effect: non-scaling-stroke;
}

.cache-tooltip {
  position: absolute;
  z-index: 3;
  min-width: 190px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  background: rgba(8, 17, 15, 0.94);
  color: var(--white);
  box-shadow: 0 14px 38px rgba(8, 17, 15, 0.2);
  pointer-events: none;
  transform: translate(-50%, calc(-100% - 14px));
}

.cache-tooltip strong {
  display: block;
  margin-bottom: 7px;
  color: var(--lime);
  font: 800 11px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.cache-tooltip > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: #b7c5bf;
  font: 650 9px/1.65 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.cache-tooltip > span > span {
  display: inline-flex;
  align-items: center;
}

.cache-tooltip i {
  width: 6px;
  height: 6px;
  margin-right: 6px;
  display: inline-block;
  border-radius: 50%;
  background: var(--tooltip-color);
}

.cache-tooltip b {
  color: #f1f6f4;
  font-weight: 750;
}

.cache-chart-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 30px;
  border-top: 1px solid var(--line);
  color: #727e78;
  font-size: 10px;
}

.cache-chart-footer p {
  margin: 0;
}

.cache-chart-footer > span {
  color: #a54f38;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: nowrap;
}

.cache-100m {
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 0.52fr)) minmax(270px, 1.44fr);
  border-top: 1px solid var(--ink);
  background: var(--ink);
  color: var(--white);
}

.cache-100m > div,
.cache-100m > p {
  min-height: 116px;
  margin: 0;
  padding: 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.cache-100m > div {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cache-100m span {
  color: #8fa099;
  font: 750 9px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cache-100m strong {
  font-size: clamp(24px, 2.4vw, 34px);
  line-height: 1;
  letter-spacing: -0.055em;
}

.cache-100m .cache-100m-accent strong {
  color: var(--lime);
}

.cache-100m > p {
  display: flex;
  align-items: center;
  border-right: 0;
  color: #aebcb6;
  font-size: 12px;
  line-height: 1.55;
}

.guidance {
  padding-top: 100px;
}

.guidance-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 70px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.guidance-track article {
  min-height: 280px;
  padding: 28px;
  border-right: 1px solid var(--line);
}

.guidance-track article:last-child {
  border-right: 0;
}

.guidance-track span {
  color: #718079;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
}

.guidance-track h3 {
  margin: 80px 0 11px;
  font-size: 24px;
  letter-spacing: -0.04em;
}

.guidance-track p {
  max-width: 290px;
  margin-bottom: 0;
  color: #626e68;
  font-size: 13px;
}

.resources {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(60px, 9vw, 140px);
  padding: 120px max(24px, calc((100vw - var(--max)) / 2));
  background: var(--ink);
  color: var(--white);
}

.resources .section-kicker {
  color: var(--mint);
}

.resources h2 {
  margin: 20px 0 28px;
}

.resources-copy > p {
  max-width: 500px;
  color: #aab8b3;
}

.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
}

.resource-links a {
  display: inline-flex;
  gap: 18px;
  padding: 11px 16px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 760;
  text-decoration: none;
}

.resource-links a:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.citation-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
}

.citation-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: #93a39d;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 10px;
  text-transform: uppercase;
}

.citation-top button {
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font: inherit;
}

.citation-top button:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.citation-card pre {
  overflow: auto;
  margin: 0;
  padding: 26px;
  color: #c7d3ce;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.7;
}

footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 50px;
  padding: 44px max(24px, calc((100vw - var(--max)) / 2));
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: var(--ink);
  color: var(--white);
}

.footer-title {
  max-width: 410px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  color: #7e8e88;
  font-size: 10px;
  text-transform: uppercase;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 4px;
}

@media (max-width: 1020px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 64px;
  }

  .hero-copy {
    max-width: 820px;
  }

  .rotation-card {
    min-height: 560px;
  }

  .signal-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .signal-strip > div:nth-child(2) {
    border-right: 0;
  }

  .signal-strip > div:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .opening-grid,
  .model-choice-head,
  .study,
  .cache-heading,
  .context-callout,
  .resources {
    grid-template-columns: 1fr;
  }

  .cache-chart-top {
    grid-template-columns: 1fr;
  }

  .cache-legend {
    justify-content: flex-start;
  }

  .cache-100m {
    grid-template-columns: repeat(3, 1fr);
  }

  .cache-100m > p {
    grid-column: 1 / -1;
    min-height: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }

  .finding-grid {
    grid-template-columns: 1fr 1fr;
  }

  .finding-card-featured {
    grid-column: 1 / -1;
  }

  .context-callout {
    gap: 24px;
  }

  .context-callout p {
    margin-top: 0;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 64px;
    grid-template-columns: 1fr auto;
    padding: 0 18px;
  }

  .site-header nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 54px 18px 50px;
  }

  h1 {
    font-size: clamp(52px, 16vw, 78px);
  }

  .hero-deck {
    font-size: 17px;
  }

  .button {
    width: 100%;
  }

  .rotation-card {
    min-height: 480px;
    padding: 18px;
    border-radius: 25px;
  }

  .rotation-card-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .rope-controls {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .rope-pair-grid {
    gap: 3px;
  }

  .rope-pair {
    height: 54px;
  }

  .signal-strip > div {
    min-height: 130px;
    padding: 24px 18px;
  }

  .signal-strip strong {
    font-size: 32px;
  }

  .section {
    padding: 88px 18px;
  }

  .opening-grid {
    gap: 36px;
  }

  .model-choice-head {
    gap: 32px;
  }

  .model-table-wrap {
    margin-right: -18px;
    border-radius: 22px 0 0 22px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .finding-grid,
  .guidance-track {
    grid-template-columns: 1fr;
  }

  .finding-card-featured {
    grid-column: auto;
  }

  .finding-card {
    min-height: 430px;
  }

  .matrix-row > span {
    width: 100%;
  }

  .context-callout {
    max-width: calc(100% - 24px);
    padding: 32px 24px;
    border-radius: 24px;
  }

  .cache-heading {
    gap: 32px;
  }

  .cache-chart-card {
    margin-top: 36px;
    border-radius: 22px;
  }

  .cache-chart-top {
    padding: 22px 18px 18px;
  }

  .cache-plot-wrap {
    min-height: 390px;
    padding: 8px 4px 0;
    overflow-x: auto;
  }

  #cache-chart {
    width: 780px;
    min-height: 390px;
  }

  .cache-chart-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 15px 18px;
  }

  .cache-100m {
    grid-template-columns: 1fr;
  }

  .cache-100m > div,
  .cache-100m > p {
    min-height: 92px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .cache-100m > p {
    grid-column: auto;
    border-bottom: 0;
  }

  .guidance-track article {
    min-height: 230px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .guidance-track article:last-child {
    border-bottom: 0;
  }

  .guidance-track h3 {
    margin-top: 56px;
  }

  .resources {
    padding: 90px 18px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 36px 18px;
  }

  .footer-meta {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}