:root {
  --ink: #0a1724;
  --ink-soft: #253548;
  --paper: #f4f1e9;
  --paper-deep: #e9e4d9;
  --white: #fffefa;
  --line: rgba(10, 23, 36, 0.16);
  --line-dark: rgba(255, 255, 255, 0.16);
  --muted: #6f7b89;
  --yellow: #f5b642;
  --orange: #e87434;
  --coral: #f06b5d;
  --mint: #69d1bb;
  --green: #3b9e73;
  --blue: #72a7ed;
  --purple: #9f86e8;
  --red: #d9554b;
  --radius: 22px;
  --shadow: 0 30px 80px rgba(10, 23, 36, 0.09);
  --shell: min(1240px, calc(100vw - 64px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  max-width: 100%;
  overflow-x: clip;
  color: var(--ink);
  background: var(--paper);
  font-family: "Manrope", "Noto Sans SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

::selection {
  color: var(--ink);
  background: var(--yellow);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

img,
svg {
  display: block;
  max-width: 100%;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: var(--ink);
  background: var(--yellow);
  border-radius: 8px;
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

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

.page-progress {
  position: fixed;
  z-index: 1001;
  inset: 0 0 auto;
  height: 3px;
  pointer-events: none;
}

.page-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--yellow);
}

.site-header {
  position: absolute;
  z-index: 100;
  inset: 0 0 auto;
  color: var(--white);
  border-bottom: 1px solid var(--line-dark);
}

.site-header.is-fixed {
  position: fixed;
  color: var(--ink);
  background: rgba(244, 241, 233, 0.9);
  border-color: var(--line);
  box-shadow: 0 8px 30px rgba(10, 23, 36, 0.06);
  backdrop-filter: blur(18px);
  animation: header-in 260ms ease both;
}

@keyframes header-in {
  from { transform: translateY(-100%); }
  to { transform: translateY(0); }
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.brand svg {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-mark {
  width: 43px;
  height: 43px;
  padding: 3px;
  object-fit: contain;
  background: rgba(255, 254, 250, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 13px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
}

.brand-dot {
  color: var(--yellow);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  margin-left: auto;
  margin-right: 36px;
  font-size: 13px;
  font-weight: 600;
}

.desktop-nav a {
  position: relative;
  opacity: 0.74;
  transition: opacity 180ms ease;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 -9px;
  height: 2px;
  background: var(--yellow);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.desktop-nav a:hover,
.desktop-nav a.active {
  opacity: 1;
}

.desktop-nav a.active::after,
.desktop-nav a:hover::after {
  transform: scaleX(1);
}

.nav-actions,
.github-link {
  display: flex;
  align-items: center;
}

.github-link {
  gap: 8px;
  padding: 10px 14px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid currentColor;
  border-radius: 999px;
  transition: color 180ms ease, background 180ms ease;
}

.github-link:hover {
  color: var(--ink);
  background: var(--yellow);
  border-color: var(--yellow);
}

.github-link svg {
  width: 17px;
  fill: currentColor;
}

.menu-button,
.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  min-height: 930px;
  padding: 180px 0 58px;
  color: var(--white);
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 28%, rgba(79, 136, 181, 0.19), transparent 27%),
    radial-gradient(circle at 10% 65%, rgba(105, 209, 187, 0.08), transparent 24%),
    var(--ink);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.055;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.65'/%3E%3C/svg%3E");
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  align-items: center;
  gap: 50px;
}

.hero-copy,
.hero-visual {
  min-width: 0;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.13em;
}

.eyebrow span {
  width: 28px;
  height: 1px;
  background: var(--orange);
}

.eyebrow.light {
  color: rgba(255, 255, 255, 0.58);
}

.eyebrow.light span {
  background: var(--yellow);
}

.hero h1 {
  max-width: 660px;
  margin: 0;
  font-size: clamp(72px, 8vw, 126px);
  line-height: 0.87;
  letter-spacing: -0.072em;
}

.hero h1 em {
  position: relative;
  color: var(--yellow);
  font-style: normal;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  right: -8px;
  bottom: 4px;
  left: 3px;
  height: 8px;
  opacity: 0.35;
  background: var(--yellow);
  transform: skewX(-18deg);
}

.hero-lede {
  max-width: 610px;
  margin: 34px 0 0;
  color: rgba(255, 255, 255, 0.67);
  font-size: 17px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  min-height: 52px;
  padding: 0 23px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

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

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

.button-primary span {
  font-size: 19px;
}

.button-ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.26);
}

.button-ghost:hover {
  border-color: rgba(255, 255, 255, 0.65);
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.hero-logo-card {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: 50%;
  width: 420px;
  height: 485px;
  padding: 48px 30px 24px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 20%, rgba(105, 209, 187, 0.2), transparent 34%),
    var(--white);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 52px;
  box-shadow:
    0 42px 90px rgba(0, 0, 0, 0.34),
    inset 0 0 0 1px rgba(10, 23, 36, 0.06);
  transform: translate(-50%, -50%) rotate(-1.5deg);
}

.hero-logo-card::before {
  content: "";
  position: absolute;
  inset: 10px;
  pointer-events: none;
  border: 1px solid rgba(10, 23, 36, 0.08);
  border-radius: 42px;
}

.hero-logo-card::after {
  content: "";
  position: absolute;
  right: -54px;
  bottom: -76px;
  width: 190px;
  height: 190px;
  pointer-events: none;
  background: var(--yellow);
  border-radius: 50%;
  opacity: 0.16;
}

.hero-logo-card img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 14px 20px rgba(10, 23, 36, 0.1));
}

.logo-card-label {
  position: absolute;
  z-index: 2;
  top: 22px;
  left: 30px;
  color: rgba(10, 23, 36, 0.48);
  font-family: "DM Mono", monospace;
  font-size: 8px;
  letter-spacing: 0.12em;
}

.hero-stack-wrap {
  position: absolute;
  z-index: 3;
  top: 52%;
  left: 50%;
  width: 335px;
  height: 390px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 160px 160px 44px 44px;
  box-shadow: inset 0 0 70px rgba(255, 255, 255, 0.03), 0 35px 80px rgba(0, 0, 0, 0.2);
  transform: translate(-50%, -50%);
  backdrop-filter: blur(9px);
}

.stack-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 8px 8px 20px;
  font-family: "DM Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
}

.stack-label span {
  color: rgba(255, 255, 255, 0.46);
}

.stack-label strong {
  color: var(--yellow);
  font-size: 11px;
}

.hero-layer-stack {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  justify-content: center;
  height: 260px;
  perspective: 600px;
}

.hero-layer {
  width: calc(72% + var(--i) * 0.8%);
  height: 8px;
  margin-top: -1px;
  border: 1px solid rgba(10, 23, 36, 0.28);
  border-radius: 50%;
  background: linear-gradient(90deg, var(--blue), #b9d9ff 48%, #588dd5);
  box-shadow: 0 3px 7px rgba(0, 0, 0, 0.18);
  transform: rotateX(58deg);
  opacity: 0;
  animation: layer-enter 520ms cubic-bezier(.2,.9,.3,1) forwards;
  animation-delay: calc(180ms + var(--i) * 32ms);
}

.hero-layer.removed {
  position: absolute;
  width: 56%;
  background: linear-gradient(90deg, var(--coral), #ffc2a2, var(--orange));
  opacity: 0.52;
  animation: cut-away 7s ease-in-out infinite;
  animation-delay: calc(var(--i) * -0.65s);
}

@keyframes layer-enter {
  from { opacity: 0; transform: translateY(-18px) rotateX(58deg); }
  to { opacity: 1; transform: translateY(0) rotateX(58deg); }
}

@keyframes cut-away {
  0%, 70%, 100% { opacity: 0; transform: translate(0, 0) rotateX(58deg); }
  76% { opacity: .65; transform: translate(0, 0) rotateX(58deg); }
  92% { opacity: 0; transform: translate(150px, -55px) rotate(18deg) rotateX(58deg); }
}

.scalpel-icon {
  position: absolute;
  z-index: 4;
  top: 140px;
  right: -58px;
  width: 134px;
  overflow: visible;
  filter: drop-shadow(0 12px 15px rgba(0, 0, 0, 0.28));
  animation: scalpel-move 7s ease-in-out infinite;
}

.scalpel-icon .blade {
  fill: #dce6ee;
  stroke: #8ba0af;
  stroke-width: 2;
}

.scalpel-icon .handle {
  fill: var(--yellow);
  stroke: #f8d679;
  stroke-width: 2;
}

.scalpel-icon circle {
  fill: var(--ink);
}

@keyframes scalpel-move {
  0%, 20%, 100% { transform: translate(20px, -70px) rotate(-17deg); }
  46%, 70% { transform: translate(-32px, 28px) rotate(-17deg); }
}

.visual-orbit {
  position: absolute;
  top: 50%;
  left: 50%;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-one {
  width: 530px;
  height: 530px;
}

.orbit-two {
  width: 660px;
  height: 370px;
  transform: translate(-50%, -50%) rotate(-14deg);
}

.micro-note {
  position: absolute;
  z-index: 4;
  padding: 8px 11px;
  color: rgba(255, 255, 255, 0.66);
  font-family: "DM Mono", monospace;
  font-size: 9px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
}

.note-a { top: 80px; right: 82px; }
.note-b { bottom: 84px; left: 42px; }

.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 74px;
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.hero-stats > div {
  display: flex;
  flex-direction: column;
  min-height: 132px;
  padding: 22px 26px;
  border-right: 1px solid var(--line-dark);
}

.hero-stats > div:first-child { padding-left: 0; }
.hero-stats > div:last-child { border-right: 0; }
.hero-stats span,
.mini-label {
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.12em;
}

.hero-stats strong {
  margin: auto 0 3px;
  font-size: 31px;
  letter-spacing: -0.05em;
}

.hero-stats small {
  color: rgba(255, 255, 255, 0.42);
  font-size: 10px;
}

.hero-rule {
  position: absolute;
  right: 0;
  bottom: 10px;
  left: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  color: rgba(255, 255, 255, 0.25);
  font-family: "DM Mono", monospace;
  font-size: 8px;
  letter-spacing: 0.2em;
}

.hero-rule::before,
.hero-rule::after {
  content: "";
  height: 1px;
  flex: 1;
  background: rgba(255, 255, 255, 0.09);
}

.section {
  padding: 136px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 110px 1fr;
  max-width: 980px;
  margin-bottom: 72px;
}

.section-index {
  padding-top: 4px;
  color: var(--orange);
  font-family: "DM Mono", monospace;
  font-size: 13px;
}

.section-heading h2 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(42px, 5.6vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.065em;
}

.section-heading p {
  max-width: 700px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.section-heading.light h2 { color: var(--white); }
.section-heading.light p { color: rgba(255, 255, 255, 0.55); }

.paper-card {
  padding: 18px;
  background: var(--white);
  border: 1px solid rgba(10, 23, 36, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.figure-media {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: transparent;
  border-radius: 14px;
}

.figure-media > img {
  width: 100%;
  transition: transform 400ms ease;
}

.figure-zoom {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: zoom-in;
}

.figure-zoom > span {
  position: absolute;
  z-index: 2;
  top: 14px;
  right: 14px;
  padding: 8px 11px;
  color: var(--white);
  background: rgba(10, 23, 36, 0.76);
  font-family: "DM Mono", monospace;
  font-size: 9px;
  letter-spacing: 0.08em;
  border-radius: 999px;
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.figure-media:hover .figure-zoom > span,
.figure-zoom:focus-visible > span {
  opacity: 1;
  transform: translateY(0);
}

.figure-media:hover > img {
  transform: scale(1.008);
}

figcaption {
  display: flex;
  gap: 18px;
  padding: 15px 4px 2px;
  color: var(--muted);
  font-size: 11px;
}

figcaption span {
  color: var(--ink);
  font-family: "DM Mono", monospace;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 42px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.process-card {
  position: relative;
  min-height: 330px;
  padding: 30px;
  border-right: 1px solid var(--line);
}

.process-card:last-child { border-right: 0; }
.process-number {
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 10px;
}

.process-icon {
  position: absolute;
  top: 24px;
  right: 24px;
  display: grid;
  width: 43px;
  height: 43px;
  place-items: center;
  color: var(--white);
  font-family: "DM Mono", monospace;
  border-radius: 50%;
}

.process-icon.teal { background: #158f86; }
.process-icon.green { background: var(--green); }
.process-icon.red { background: var(--red); }
.process-icon.orange { background: var(--orange); }
.process-card h3 {
  margin: 74px 0 18px;
  font-size: 28px;
  letter-spacing: -0.04em;
}

.process-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.process-card small {
  position: absolute;
  bottom: 26px;
  left: 30px;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 8px;
  letter-spacing: 0.11em;
}

.risk-panel {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 72px;
  align-items: center;
  margin-top: 72px;
  padding: 58px;
  color: var(--white);
  background: var(--ink);
  border-radius: var(--radius);
}

.risk-copy h3 {
  margin: 12px 0 16px;
  font-size: 34px;
  letter-spacing: -0.05em;
}

.risk-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
  line-height: 1.9;
}

.formula-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 14px;
}

.formula-card > div {
  display: grid;
  grid-template-columns: 118px 1fr;
  align-items: center;
  min-height: 68px;
  padding: 15px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
}

.formula-card > div:last-child { border-bottom: 0; }
.formula-card span {
  color: rgba(255, 255, 255, 0.45);
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.formula-card code {
  color: rgba(255, 255, 255, 0.9);
  font-family: "DM Mono", monospace;
  font-size: 13px;
}

.formula-card .formula-result {
  background: var(--yellow);
}

.formula-card .formula-result span,
.formula-card .formula-result code {
  color: var(--ink);
}

.results-section {
  color: var(--white);
  background: #101f2e;
}

.tradeoff-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 22px;
}

.chart-card,
.result-callout,
.field-panel {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius);
}

.chart-card {
  min-width: 0;
  padding: 30px;
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
}

.card-head h3,
.figure-title h3 {
  margin: 7px 0 0;
  font-size: 26px;
  letter-spacing: -0.04em;
}

.chart-legend,
.field-summary,
.map-legend {
  display: flex;
  align-items: center;
  gap: 18px;
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.chart-legend span,
.field-summary span,
.map-legend span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.chart-legend i,
.field-summary i,
.map-legend i {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.legend-accuracy,
.baseline-dot { background: var(--mint); }
.legend-speed,
.final-dot { background: var(--yellow); }

.chart-wrap {
  width: 100%;
  height: 390px;
  margin-top: 24px;
}

.chart-wrap svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chart-grid-line {
  stroke: rgba(255, 255, 255, 0.09);
  stroke-width: 1;
}

.chart-axis-label,
.chart-tick {
  fill: rgba(255, 255, 255, 0.44);
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.chart-area {
  fill: url("#accuracyGradient");
}

.chart-accuracy-line,
.chart-speed-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.chart-accuracy-line { stroke: var(--mint); stroke-width: 3; }
.chart-speed-line { stroke: var(--yellow); stroke-width: 3; }
.chart-point { stroke: #101f2e; stroke-width: 3; cursor: pointer; }
.chart-point.accuracy { fill: var(--mint); }
.chart-point.speed { fill: var(--yellow); }
.chart-point:hover { stroke-width: 6; }

.chart-tooltip {
  pointer-events: none;
}

.chart-tooltip rect {
  fill: var(--white);
  rx: 8px;
}

.chart-tooltip text {
  fill: var(--ink);
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.chart-foot {
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.33);
  font-family: "DM Mono", monospace;
  font-size: 8px;
}

.result-callout {
  padding: 30px;
}

.big-number {
  margin: 27px 0 0;
  color: var(--yellow);
  font-size: 106px;
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.09em;
}

.big-number span {
  font-size: 28px;
  letter-spacing: -0.04em;
}

.result-callout h3 {
  margin: 14px 0 26px;
  font-size: 24px;
}

.result-callout dl {
  margin: 0;
}

.result-callout dl div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.result-callout dt {
  color: rgba(255, 255, 255, 0.44);
  font-size: 10px;
}

.result-callout dd {
  margin: 0;
  font-family: "DM Mono", monospace;
  font-size: 12px;
}

.recovery-meter {
  margin-top: 24px;
  padding: 15px;
  color: var(--ink);
  background: var(--white);
  border-radius: 12px;
}

.recovery-meter > div:not(.meter-track) {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
}

.meter-track {
  height: 6px;
  margin: 10px 0;
  overflow: hidden;
  background: var(--paper-deep);
  border-radius: 999px;
}

.meter-track i {
  display: block;
  width: 97%;
  height: 100%;
  background: linear-gradient(90deg, var(--coral), var(--green));
  border-radius: inherit;
}

.field-panel {
  display: grid;
  grid-template-columns: 0.38fr 0.62fr;
  gap: 56px;
  margin-top: 22px;
  padding: 42px;
}

.field-copy h3 {
  margin: 13px 0 18px;
  font-size: 32px;
  letter-spacing: -0.05em;
}

.field-copy p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  line-height: 1.85;
}

.field-summary {
  margin-top: 36px;
  color: rgba(255, 255, 255, 0.65);
}

.field-chart {
  display: grid;
  gap: 13px;
}

.field-row {
  display: grid;
  grid-template-columns: 112px 1fr 50px;
  align-items: center;
  gap: 12px;
  font-size: 10px;
}

.field-name {
  color: rgba(255, 255, 255, 0.58);
  font-family: "DM Mono", monospace;
}

.field-bars {
  position: relative;
  height: 14px;
}

.field-bars i {
  position: absolute;
  left: 0;
  height: 5px;
  border-radius: 999px;
  transform-origin: left;
  animation: bar-grow 800ms ease both;
}

.field-bars i:first-child {
  top: 1px;
  width: var(--baseline);
  background: var(--mint);
  opacity: 0.42;
}

.field-bars i:last-child {
  bottom: 1px;
  width: var(--final);
  background: var(--yellow);
}

@keyframes bar-grow { from { transform: scaleX(0); } }
.field-value {
  text-align: right;
  color: var(--yellow);
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.loss-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 22px;
}

.loss-equation-card,
.weight-card {
  padding: 44px;
  background: var(--white);
  border: 1px solid rgba(10, 23, 36, 0.09);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.main-equation {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 42px 0;
  font-family: Georgia, serif;
  font-size: clamp(46px, 6vw, 82px);
  line-height: 1;
  letter-spacing: -0.06em;
}

.main-equation span:first-child { color: var(--orange); }
.main-equation sub {
  margin-left: -7px;
  font-family: "DM Mono", monospace;
  font-size: 13px;
  letter-spacing: 0;
}

.main-equation sup {
  align-self: flex-start;
  margin: 2px 4px 0 -4px;
  color: var(--orange);
  font-family: "DM Mono", monospace;
  font-size: 13px;
  letter-spacing: 0;
}

.boundary-equation {
  letter-spacing: -0.035em;
}

.main-equation b {
  margin: 0 8px;
  color: var(--muted);
  font-size: 35px;
  font-weight: 400;
}

.equation-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 13px;
}

.equation-detail > div {
  padding: 20px;
}

.equation-detail > div + div {
  border-left: 1px solid var(--line);
}

.equation-detail strong {
  font-family: Georgia, serif;
  font-size: 23px;
}

.equation-detail p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.7;
}

.normalization-note {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 18px;
  padding: 18px;
  background: #eef3f5;
  border-radius: 12px;
}

.normalization-note code {
  font-family: "DM Mono", monospace;
  font-size: 11px;
}

.normalization-note span {
  color: var(--muted);
  font-size: 10px;
}

.weight-card h3 {
  margin: 14px 0 35px;
  font-size: 31px;
  line-height: 1.15;
  letter-spacing: -0.05em;
}

.weight-list {
  display: grid;
  gap: 24px;
}

.weight-list > div {
  position: relative;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  padding-bottom: 12px;
}

.weight-list span {
  color: var(--orange);
  font-family: "DM Mono", monospace;
  font-size: 11px;
  font-weight: 500;
}

.weight-list p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
}

.weight-list i {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange) var(--w), var(--paper-deep) var(--w));
}

.loss-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 24px;
}

.loss-figure {
  margin: 24px 0 0;
  padding: 26px;
}

.loss-figures .loss-figure {
  min-width: 0;
  margin: 0;
}

.figure-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 0 6px 24px;
}

.figure-title p {
  margin: 0;
  color: var(--muted);
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.loss-figure .figure-media {
  background: #fff;
  border: 1px solid rgba(10, 23, 36, 0.08);
}

.loss-figures .figure-title h3 {
  font-size: 22px;
}

.loss-figures .figure-media > img {
  aspect-ratio: 1914 / 1098;
  object-fit: cover;
}

.recovery-strip {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 30px;
  margin-top: 24px;
  padding: 34px 42px;
  color: var(--white);
  background: var(--ink);
  border-radius: var(--radius);
}

.recovery-strip > div:not(.strip-arrow) {
  display: flex;
  flex-direction: column;
}

.recovery-strip span {
  color: var(--yellow);
  font-family: "DM Mono", monospace;
  font-size: 8px;
  letter-spacing: 0.1em;
}

.recovery-strip strong {
  margin-top: 6px;
  font-size: 15px;
}

.recovery-strip small {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.42);
  font-size: 9px;
}

.strip-arrow {
  color: rgba(255, 255, 255, 0.25);
}

.rounds-section {
  background: #e8e3d8;
}

.round-explorer,
.table-card {
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(10, 23, 36, 0.08);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.round-controls {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  border-bottom: 1px solid var(--line);
}

.round-button {
  min-height: 70px;
  color: var(--muted);
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  cursor: pointer;
  font-family: "DM Mono", monospace;
  font-size: 10px;
  transition: color 160ms ease, background 160ms ease;
}

.round-button:last-child { border-right: 0; }
.round-button:hover { color: var(--ink); background: rgba(10, 23, 36, 0.035); }
.round-button.active { color: var(--ink); background: var(--yellow); font-weight: 500; }

.round-stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  min-height: 430px;
}

.layer-map-wrap {
  padding: 38px;
}

.layer-map-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.layer-map-head h3 {
  margin: 8px 0 0;
  font-size: 25px;
  letter-spacing: -0.04em;
}

.map-legend {
  color: var(--muted);
}

.map-legend span:nth-child(1) i { background: var(--blue); }
.map-legend span:nth-child(2) i { background: var(--coral); }
.map-legend span:nth-child(3) i { background: #c6c2b9; }

.layer-map {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
  margin-top: 38px;
}

.layer-cell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  color: #365274;
  background: #e6f0ff;
  border: 1px solid #bad1ee;
  border-radius: 12px;
  font-family: "DM Mono", monospace;
  font-size: 11px;
  transition: transform 180ms ease, opacity 180ms ease, background 180ms ease;
}

.layer-cell::before {
  content: "L";
  margin-right: 1px;
  opacity: 0.45;
  font-size: 8px;
}

.layer-cell.deleted {
  color: #8c8982;
  background: #eeeae3;
  border-color: #d4d0c7;
  opacity: 0.5;
  text-decoration: line-through;
}

.layer-cell.just-deleted {
  color: #8c2822;
  background: #ffded8;
  border-color: #f19a8d;
  opacity: 1;
  transform: rotate(-3deg) scale(1.04);
  text-decoration: none;
  box-shadow: 0 8px 18px rgba(217, 85, 75, 0.13);
}

.round-detail {
  padding: 38px 30px;
  color: var(--white);
  background: var(--ink);
}

.round-detail .round-tag {
  color: var(--yellow);
  font-family: "DM Mono", monospace;
  font-size: 9px;
}

.round-detail h3 {
  margin: 16px 0 4px;
  font-size: 44px;
  line-height: 1;
  letter-spacing: -0.06em;
}

.round-detail > p {
  margin: 0 0 32px;
  color: rgba(255, 255, 255, 0.45);
  font-size: 11px;
}

.round-detail dl {
  margin: 0;
}

.round-detail dl div {
  display: flex;
  justify-content: space-between;
  padding: 15px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.round-detail dt {
  color: rgba(255, 255, 255, 0.42);
  font-size: 10px;
}

.round-detail dd {
  margin: 0;
  font-family: "DM Mono", monospace;
  font-size: 11px;
}

.round-detail .detail-accent { color: var(--yellow); }
.table-card { margin-top: 24px; padding: 30px; }
.table-toggle {
  padding: 9px 13px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  font-size: 10px;
}

.table-toggle span {
  display: inline-block;
  margin-left: 5px;
  transition: transform 180ms ease;
}

.table-toggle[aria-expanded="true"] span { transform: rotate(180deg); }
.table-scroll { margin-top: 24px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 11px; }
th, td { padding: 16px 14px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
th:first-child, td:first-child { padding-left: 0; text-align: left; }
th { color: var(--muted); font-family: "DM Mono", monospace; font-size: 8px; font-weight: 500; letter-spacing: 0.06em; }
td { font-family: "DM Mono", monospace; }
tbody tr { transition: background 150ms ease; }
tbody tr:hover { background: #f7f4ee; }
tbody tr:last-child td { color: var(--ink); background: rgba(245, 182, 66, 0.12); border-bottom: 0; }
.positive { color: var(--green); }
.negative { color: var(--red); }
.optional-col { display: none; }
.table-card.expanded .optional-col { display: table-cell; }

.boundary-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  align-items: center;
  margin-top: 24px;
  padding: 46px;
  color: var(--white);
  background: #5d4ba3;
  border-radius: var(--radius);
}

.boundary-card h3 {
  margin: 12px 0 15px;
  font-size: 31px;
  line-height: 1.2;
  letter-spacing: -0.05em;
}

.boundary-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.63);
  font-size: 12px;
  line-height: 1.8;
}

.benchmark-table {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
}

.benchmark-row {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  padding: 15px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  font-family: "DM Mono", monospace;
  font-size: 10px;
}

.benchmark-row:last-child { border-bottom: 0; }
.benchmark-row span { text-align: right; }
.benchmark-row.head { color: rgba(255, 255, 255, 0.45); font-size: 8px; }
.benchmark-row.final { color: var(--ink); background: var(--yellow); }

.reproduce-section {
  color: var(--white);
  background: var(--ink);
}

.code-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.code-card {
  overflow: hidden;
  background: #0f2234;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 17px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
}

.code-head b {
  margin-right: 8px;
  color: var(--yellow);
  font-family: "DM Mono", monospace;
}

.copy-button {
  padding: 7px 10px;
  color: rgba(255, 255, 255, 0.55);
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  cursor: pointer;
  font-family: "DM Mono", monospace;
  font-size: 8px;
  transition: color 150ms ease, border-color 150ms ease;
}

.copy-button:hover { color: var(--yellow); border-color: var(--yellow); }
pre { min-height: 358px; margin: 0; padding: 26px; overflow-x: auto; }
code { font-family: "DM Mono", monospace; }
pre code { color: #b7c8d8; font-size: 10px; line-height: 2; }

.file-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: 13px;
  margin-top: 60px;
}

.file-flow a {
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  transition: border-color 160ms ease, transform 160ms ease;
}

.file-flow a:hover { border-color: var(--yellow); transform: translateY(-3px); }
.file-flow > i { align-self: center; color: rgba(255, 255, 255, 0.24); font-style: normal; }
.file-flow span { color: var(--yellow); font-family: "DM Mono", monospace; font-size: 8px; }
.file-flow strong { margin-top: 7px; font-size: 13px; }
.file-flow small { margin-top: 4px; color: rgba(255, 255, 255, 0.38); font-size: 9px; }

.site-footer {
  padding: 70px 0 25px;
  color: var(--ink);
  background: var(--yellow);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 0.6fr 0.6fr;
  gap: 70px;
}

.footer-brand { font-size: 23px; }
.footer-grid p { max-width: 330px; margin: 20px 0 0; font-size: 12px; }
.footer-grid > div:not(:first-child) { display: flex; flex-direction: column; gap: 10px; }
.footer-grid > div:not(:first-child) > span { margin-bottom: 7px; font-family: "DM Mono", monospace; font-size: 8px; letter-spacing: 0.1em; opacity: 0.55; }
.footer-grid a:not(.brand) { font-size: 12px; }
.footer-grid a:not(.brand):hover { text-decoration: underline; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  margin-top: 65px;
  padding-top: 18px;
  font-family: "DM Mono", monospace;
  font-size: 8px;
  border-top: 1px solid rgba(10, 23, 36, 0.25);
}

.figure-dialog {
  width: min(96vw, 1500px);
  max-width: none;
  max-height: 94vh;
  padding: 18px;
  background: var(--white);
  border: 0;
  border-radius: 18px;
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.45);
}

.figure-dialog::backdrop {
  background: rgba(5, 12, 20, 0.8);
  backdrop-filter: blur(8px);
}

.figure-dialog img {
  width: 100%;
  max-height: calc(94vh - 36px);
  object-fit: contain;
}

.figure-dialog button {
  position: absolute;
  z-index: 2;
  top: 12px;
  right: 12px;
  display: grid;
  width: 38px;
  height: 38px;
  padding: 0;
  place-items: center;
  color: var(--white);
  background: var(--ink);
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  font-size: 24px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(.2,.7,.2,1);
  transition-delay: var(--delay, 0ms);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 1080px) {
  :root { --shell: min(100% - 44px, 980px); }
  .desktop-nav { gap: 22px; }
  .hero { min-height: 1040px; }
  .hero-grid { grid-template-columns: 1fr 0.9fr; gap: 20px; }
  .hero-visual { transform: scale(.86); }
  .process-card { padding: 23px; }
  .process-card small { left: 23px; }
  .field-panel { grid-template-columns: 1fr; }
  .loss-figures { grid-template-columns: 1fr; }
  .round-stage { grid-template-columns: 1fr 280px; }
  .layer-map { grid-template-columns: repeat(4, 1fr); }
  .boundary-card { gap: 38px; }
  .file-flow { grid-template-columns: 1fr 1fr; }
  .file-flow > i { display: none; }
}

@media (max-width: 820px) {
  :root { --shell: calc(100vw - 36px); }
  .desktop-nav, .github-link span { display: none; }
  .github-link { padding: 10px; border: 0; }
  .menu-button {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: 4px;
    padding: 12px;
    background: transparent;
    border: 0;
  }
  .menu-button span:not(.sr-only) { width: 20px; height: 1px; background: currentColor; transition: transform 160ms ease; }
  .menu-button[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(2) { transform: translateY(-3px) rotate(-45deg); }
  .mobile-nav {
    position: fixed;
    inset: 78px 0 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 24px 18px;
    color: var(--ink);
    background: var(--paper);
    transform: translateX(100%);
    transition: transform 220ms ease;
  }
  .mobile-nav.open { transform: translateX(0); }
  .mobile-nav a { padding: 18px 7px; font-size: 23px; font-weight: 700; border-bottom: 1px solid var(--line); }
  .hero { min-height: auto; padding-top: 150px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: clamp(67px, 18vw, 110px); }
  .hero-visual { min-height: 600px; transform: scale(.9); }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats > div:nth-child(2) { border-right: 0; }
  .hero-stats > div:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .hero-stats > div:nth-child(3) { padding-left: 0; }
  .section { padding: 100px 0; }
  .section-heading { grid-template-columns: 58px 1fr; margin-bottom: 52px; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-card:nth-child(2) { border-right: 0; }
  .process-card:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .risk-panel { grid-template-columns: 1fr; gap: 35px; padding: 38px; }
  .tradeoff-grid { grid-template-columns: 1fr; }
  .result-callout { display: grid; grid-template-columns: 1fr 1fr; gap: 0 26px; }
  .result-callout dl { grid-column: 2; grid-row: 1 / 4; }
  .result-callout .recovery-meter { grid-column: 1 / -1; }
  .loss-grid { grid-template-columns: 1fr; }
  .round-controls { grid-template-columns: repeat(5, 1fr); }
  .round-button:nth-child(-n+5) { border-bottom: 1px solid var(--line); }
  .round-stage { grid-template-columns: 1fr; }
  .boundary-card { grid-template-columns: 1fr; }
  .code-grid { grid-template-columns: 1fr; }
  pre { min-height: auto; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 25px; }
}

@media (max-width: 560px) {
  :root { --shell: calc(100vw - 28px); --radius: 17px; }
  .nav-wrap { height: 68px; }
  .mobile-nav { top: 68px; }
  .hero { padding-top: 125px; }
  .hero h1 { font-size: 62px; }
  .hero-lede { font-size: 14px; }
  .hero-actions { flex-direction: column; }
  .hero-copy { width: 100%; max-width: 100%; overflow: hidden; }
  .hero-lede { max-width: 100%; overflow-wrap: anywhere; }
  .hero-actions { width: 100%; }
  .hero-actions .button { width: 100%; max-width: 100%; }
  .hero-visual {
    width: 100%;
    min-height: 505px;
    margin: -35px 0 -110px;
    transform: scale(.72);
    transform-origin: center top;
  }
  .hero-logo-card { width: 410px; height: 470px; }
  .hero-stats { margin-top: 35px; }
  .hero-stats > div { min-height: 112px; padding: 16px; }
  .hero-stats strong { font-size: 25px; }
  .section { padding: 78px 0; }
  .section-heading { grid-template-columns: 1fr; gap: 16px; }
  .section-heading h2 { font-size: 42px; }
  .section-heading p { font-size: 14px; }
  figcaption { flex-direction: column; gap: 5px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-card { min-height: 260px; border-right: 0; border-bottom: 1px solid var(--line); }
  .process-card:nth-child(3) { border-bottom: 1px solid var(--line); }
  .process-card:last-child { border-bottom: 0; }
  .risk-panel { padding: 27px 20px; }
  .formula-card > div { grid-template-columns: 1fr; gap: 8px; }
  .chart-card { padding: 20px 14px; }
  .card-head, .figure-title, .layer-map-head { flex-direction: column; }
  .chart-wrap { height: 315px; }
  .chart-foot { gap: 10px; }
  .result-callout { display: block; padding: 25px; }
  .big-number { font-size: 90px; }
  .field-panel { padding: 25px 18px; gap: 36px; }
  .field-row { grid-template-columns: 83px 1fr 45px; gap: 8px; }
  .loss-equation-card, .weight-card { padding: 28px 22px; }
  .main-equation { font-size: 43px; gap: 4px; }
  .main-equation b { margin: 0 1px; font-size: 23px; }
  .main-equation sub { font-size: 9px; }
  .equation-detail { grid-template-columns: 1fr; }
  .equation-detail > div + div { border-top: 1px solid var(--line); border-left: 0; }
  .loss-figure { padding: 12px; }
  .loss-figures { gap: 16px; }
  .loss-figures .figure-title { padding: 8px 6px 18px; }
  .loss-figures .figure-title h3 { font-size: 20px; }
  .recovery-strip { grid-template-columns: 1fr; gap: 17px; padding: 28px; }
  .strip-arrow { transform: rotate(90deg); transform-origin: left; }
  .round-controls { grid-template-columns: repeat(5, 1fr); }
  .round-button { min-height: 57px; }
  .layer-map-wrap { padding: 25px 18px; }
  .map-legend { flex-wrap: wrap; }
  .layer-map { grid-template-columns: repeat(4, 1fr); gap: 7px; }
  .layer-cell { min-height: 49px; }
  .round-detail { padding: 29px 22px; }
  .table-card { padding: 24px 18px; }
  .boundary-card { padding: 28px 20px; gap: 30px; }
  .benchmark-row { padding: 13px 10px; font-size: 8px; }
  .code-head { align-items: flex-start; gap: 12px; }
  pre { padding: 20px 17px; }
  pre code { font-size: 9px; }
  .file-flow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > div:first-child { grid-column: 1 / -1; margin-bottom: 18px; }
  .footer-bottom { gap: 15px; }
}