:root {
  color-scheme: dark;
  --ink: #f5f8fc;
  --muted: #9dafc5;
  --muted-strong: #bfd0e2;
  --bg: #07111f;
  --bg-deep: #030912;
  --panel: rgba(13, 27, 45, 0.78);
  --panel-solid: #0c1a2c;
  --line: rgba(139, 184, 224, 0.2);
  --line-strong: rgba(139, 184, 224, 0.4);
  --blue: #18b9ff;
  --blue-light: #82dcff;
  --gold: #ffbf52;
  --gold-light: #ffe1a3;
  --green: #3fddb0;
  --danger: #ff8d79;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  --radius: 22px;
  --shell: min(1180px, calc(100vw - 44px));
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 15% 12%, rgba(24, 185, 255, 0.08), transparent 30%),
    radial-gradient(circle at 85% 52%, rgba(255, 191, 82, 0.055), transparent 28%),
    var(--bg);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

button,
input {
  font: inherit;
}

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

img {
  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;
  transform: translateY(-160%);
  padding: 10px 16px;
  border-radius: 8px;
  background: white;
  color: #07111f;
}

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

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
}

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease, backdrop-filter 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: rgba(3, 9, 18, 0.82);
  backdrop-filter: blur(18px);
}

.nav-shell {
  width: var(--shell);
  height: 76px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid rgba(24, 185, 255, 0.5);
  border-radius: 50%;
  color: var(--blue-light);
  box-shadow: inset 0 0 18px rgba(24, 185, 255, 0.12);
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 520ms var(--ease-out);
}

.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  border-color: var(--blue-light);
  box-shadow: inset 0 0 18px rgba(24, 185, 255, 0.18), 0 0 24px rgba(24, 185, 255, 0.16);
  transform: rotate(1turn);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: var(--muted-strong);
  font-size: 0.9rem;
  font-weight: 650;
}

.site-nav a {
  transition: color 150ms ease;
}

.site-nav a:hover {
  color: white;
}

.site-nav .nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: white;
  background: rgba(255, 255, 255, 0.04);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-solid);
}

.nav-toggle span:not(.sr-only) {
  display: block;
  height: 2px;
  margin: 4px 0;
  border-radius: 2px;
  background: white;
}

.hero {
  position: relative;
  min-height: 810px;
  isolation: isolate;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-deep);
}

.hero-art,
.hero-shade,
.hero-grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-art {
  z-index: -4;
  object-fit: cover;
  object-position: center;
  opacity: 0.58;
  filter: saturate(0.9) contrast(1.05);
  transform: scale(1.05);
  animation: hero-art-drift 20s ease-in-out infinite alternate;
}

.hero-shade {
  z-index: -3;
  background:
    linear-gradient(90deg, rgba(3, 9, 18, 0.98) 0%, rgba(3, 9, 18, 0.82) 47%, rgba(3, 9, 18, 0.18) 82%),
    linear-gradient(0deg, var(--bg) 0%, transparent 28%, rgba(3, 9, 18, 0.45) 100%);
}

.hero-grid {
  z-index: -2;
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(24, 185, 255, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 185, 255, 0.15) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to right, black, transparent 66%);
  animation: hero-grid-drift 24s linear infinite;
}

.hero-content {
  padding-top: 76px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--blue-light);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 6px rgba(63, 221, 176, 0.1), 0 0 18px var(--green);
  animation: signal-pulse 2.4s ease-in-out infinite;
}

.hero h1 {
  max-width: 880px;
  margin: 0;
  font-size: clamp(3.25rem, 7.2vw, 6.7rem);
  line-height: 0.99;
  letter-spacing: -0.062em;
  text-wrap: balance;
}

.hero-title-name {
  display: block;
  color: white;
  font-size: 1em;
  line-height: 0.92;
}

.hero-title-tagline {
  display: block;
  margin-top: 0.22em;
  font-size: 0.58em;
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.hero h1 .hero-title-accent {
  color: transparent;
  background: linear-gradient(100deg, var(--blue-light), var(--blue) 50%, var(--gold));
  background-size: 180% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  animation: title-gradient-flow 8s ease-in-out infinite alternate;
}

.hero .eyebrow,
.hero-title-name,
.hero-title-tagline,
.hero-copy,
.hero-actions,
.hero-links {
  animation: hero-enter 720ms var(--ease-out) both;
}

.hero .eyebrow { animation-delay: 80ms; }
.hero-title-name { animation-delay: 150ms; }
.hero-title-tagline { animation-delay: 230ms; }
.hero-copy { animation-delay: 320ms; }
.hero-actions { animation-delay: 400ms; }
.hero-links { animation-delay: 470ms; }

.hero-copy {
  max-width: 700px;
  margin: 30px 0 0;
  color: #cad8e7;
  font-size: clamp(1.04rem, 1.6vw, 1.25rem);
  line-height: 1.7;
}

.hero-actions,
.team-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-size: 0.94rem;
  font-weight: 800;
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.button > span {
  transition: transform 180ms var(--ease-out);
}

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

.button:hover > span,
.button:focus-visible > span {
  transform: translateX(3px);
}

.button-primary:hover {
  box-shadow: 0 14px 36px rgba(24, 185, 255, 0.28);
}

.button-primary {
  color: #02111d;
  background: linear-gradient(105deg, var(--blue-light), var(--blue));
  box-shadow: 0 10px 28px rgba(24, 185, 255, 0.2);
}

.button-secondary {
  border-color: var(--line-strong);
  background: rgba(8, 20, 35, 0.68);
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  font-size: 0.82rem;
  font-weight: 750;
}

.hero-links .resource-link {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--muted-strong);
  background: rgba(8, 20, 35, 0.68);
  text-decoration: none;
  transition: color 150ms ease, border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.hero-links .resource-link-primary {
  border-color: rgba(130, 220, 255, 0.42);
  color: #eef9ff;
  background: rgba(24, 185, 255, 0.11);
}

.hero-links .resource-link:hover,
.hero-links .resource-link:focus-visible {
  border-color: var(--blue-light);
  color: white;
  background: rgba(24, 185, 255, 0.16);
  transform: translateY(-2px);
}

@keyframes hero-art-drift {
  from { transform: scale(1.05) translate3d(-0.4%, -0.25%, 0); }
  to { transform: scale(1.085) translate3d(0.7%, 0.35%, 0); }
}

@keyframes hero-grid-drift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 72px 72px, 72px 72px; }
}

@keyframes signal-pulse {
  0%, 100% { box-shadow: 0 0 0 5px rgba(63, 221, 176, 0.08), 0 0 14px rgba(63, 221, 176, 0.68); }
  50% { box-shadow: 0 0 0 9px rgba(63, 221, 176, 0.025), 0 0 24px rgba(63, 221, 176, 0.92); }
}

@keyframes title-gradient-flow {
  from { background-position: 0% 50%; }
  to { background-position: 100% 50%; }
}

@keyframes hero-enter {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes table-row-enter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.section {
  position: relative;
  padding: 122px 0;
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.8fr);
  gap: 80px;
  align-items: end;
}

.split-heading h2,
.center-heading h2,
.quickstart-copy h2,
.team-callout h2 {
  margin: 0;
  font-size: clamp(2.35rem, 4.5vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -0.052em;
  text-wrap: balance;
}

.split-heading > p,
.center-heading > p,
.quickstart-copy > p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 1.03rem;
  line-height: 1.75;
}

.failure-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 58px;
}

.failure-card {
  min-height: 250px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(17, 37, 61, 0.72), rgba(7, 17, 31, 0.72));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.025);
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms var(--ease-out);
}

.card-index {
  color: var(--blue-light);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.75rem;
}

.failure-card h3 {
  margin: 48px 0 10px;
  font-size: 1.05rem;
}

.failure-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.section-harness {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 50%, rgba(24, 185, 255, 0.09), transparent 46%),
    var(--bg-deep);
}

.center-heading {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.center-heading > p {
  max-width: 670px;
  margin: 20px auto 0;
}

.harness-frame {
  margin: 62px 0 0;
  overflow: hidden;
  border: 1px solid rgba(130, 220, 255, 0.24);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow), 0 0 70px rgba(24, 185, 255, 0.08);
  transition: border-color 260ms ease, box-shadow 260ms ease, transform 260ms var(--ease-out);
}

.harness-frame img {
  width: 100%;
}

.harness-frame figcaption {
  padding: 18px 24px 22px;
  border-top: 1px solid #d7e3ee;
  color: #415066;
  background: #f6f9fc;
  font-size: 0.84rem;
}

.section-benchmark {
  background: linear-gradient(180deg, var(--bg), #091728);
}

.ladder {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 64px;
}

.ladder-card {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 21, 37, 0.8);
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms var(--ease-out);
}

.ladder-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  content: "";
  transform: scaleX(0.72);
  transform-origin: left;
  transition: transform 320ms var(--ease-out);
}

.ladder-one::before { background: var(--green); }
.ladder-two::before { background: var(--blue); }
.ladder-three::before { background: var(--gold); }

.ladder-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ladder-topline span {
  display: inline-flex;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: white;
  font-size: 0.74rem;
  font-weight: 800;
}

.ladder-topline em {
  color: var(--muted);
  font-size: 0.72rem;
  font-style: normal;
}

.ladder-card h3 {
  margin: 68px 0 18px;
  font-size: 1.55rem;
  letter-spacing: -0.025em;
}

.ladder-card > p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 0.93rem;
}

.ladder-card dl {
  position: absolute;
  inset: auto 28px 28px;
  margin: 0;
  border-top: 1px solid var(--line);
}

.ladder-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.8rem;
}

.ladder-card dt { color: var(--muted); }
.ladder-card dd { margin: 0; color: white; font-weight: 700; }

.section-results {
  padding-top: 72px;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 191, 82, 0.08), transparent 24%),
    var(--bg-deep);
}

.results-heading {
  max-width: 760px;
}

.results-heading h2 {
  margin: 0;
  font-size: clamp(2.35rem, 4.5vw, 4.3rem);
  line-height: 1.06;
  letter-spacing: -0.052em;
}

.results-heading > p:last-child {
  max-width: 680px;
  margin: 18px 0 0;
  color: var(--muted-strong);
  font-size: 1.03rem;
}

.leaderboard-panel {
  margin-top: 44px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(9, 22, 38, 0.88);
  box-shadow: var(--shadow);
}

.leaderboard-panel tbody tr {
  animation: table-row-enter 360ms var(--ease-out) both;
  animation-delay: calc(var(--row-index, 0) * 34ms);
}

.leaderboard-toolbar {
  display: flex;
  min-height: 80px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.release-version {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.setting-tabs {
  display: inline-flex;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.18);
}

.setting-tabs button {
  min-width: 86px;
  padding: 8px 14px;
  border: 0;
  border-radius: 8px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 750;
}

.setting-tabs button[aria-pressed="true"] {
  color: white;
  background: #15304d;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.noscript-note {
  color: var(--muted);
  font-size: 0.78rem;
}

.table-scroll {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

th,
td {
  padding: 17px 22px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  background: rgba(5, 14, 25, 0.58);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

td:first-child {
  width: 70px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

tbody tr:hover td {
  background: rgba(24, 185, 255, 0.035);
}

.method-cell {
  min-width: 250px;
  color: white;
  font-weight: 740;
}

.score-cell {
  min-width: 170px;
}

.score-cell strong { color: white; }

.reference-row td {
  color: var(--muted);
  background: rgba(255, 255, 255, 0.018);
}

.best-row .score-cell strong {
  color: var(--gold-light);
}

.runner-up-row .score-cell strong {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.leaderboard-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.76rem;
}

.leaderboard-note p { margin: 0; }
.leaderboard-note a { color: var(--blue-light); font-weight: 700; }

.quickstart-layout {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 70px;
  align-items: center;
}

.quickstart-copy > p {
  margin-top: 24px;
}

.step-list {
  padding: 0;
  margin: 32px 0;
  list-style: none;
}

.step-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.step-list li > span {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  color: var(--blue-light);
  font-size: 0.75rem;
  font-weight: 800;
}

.step-list strong,
.step-list small {
  display: block;
}

.step-list small {
  margin-top: 2px;
  color: var(--muted);
}

.text-link {
  color: var(--blue-light);
  font-size: 0.9rem;
  font-weight: 750;
}

.quickstart-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
}

.text-link-muted {
  color: var(--muted-strong);
  font-weight: 650;
}

.terminal-card {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #030912;
  box-shadow: var(--shadow), 0 0 80px rgba(24, 185, 255, 0.07);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 50px;
  padding: 0 18px;
  border-bottom: 1px solid var(--line);
  background: #0b1726;
}

.terminal-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ff6b68;
}

.terminal-bar span:nth-child(2) { background: #ffc14e; }
.terminal-bar span:nth-child(3) { background: #40cf79; }
.terminal-bar em {
  margin-left: 8px;
  color: var(--muted);
  font-size: 0.72rem;
  font-style: normal;
}

.terminal-card pre {
  min-height: 440px;
  margin: 0;
  overflow: auto;
  padding: 28px;
  color: #d4e3f2;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.79rem;
  line-height: 1.7;
  white-space: pre;
}

.prompt { color: var(--green); }
.string { color: var(--gold-light); }
.variable { color: var(--blue-light); }
.comment { color: #6f839b; }

.copy-button {
  width: 100%;
  padding: 13px 18px;
  border: 0;
  border-top: 1px solid var(--line);
  color: var(--blue-light);
  background: #081421;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 750;
  transition: color 180ms ease, background 180ms ease;
}

.copy-button:hover,
.copy-button:focus-visible {
  color: white;
  background: #0d2034;
}

.motion-ready .reveal-item {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 640ms var(--ease-out),
    transform 640ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

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

@media (hover: hover) and (pointer: fine) {
  .failure-card:hover,
  .ladder-card:hover {
    border-color: rgba(130, 220, 255, 0.4);
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.22), 0 0 34px rgba(24, 185, 255, 0.055);
    transform: translateY(-4px);
  }

  .ladder-card:hover::before {
    transform: scaleX(1);
  }

  .harness-frame:hover {
    border-color: rgba(130, 220, 255, 0.42);
    box-shadow: var(--shadow), 0 0 86px rgba(24, 185, 255, 0.13);
    transform: translateY(-3px);
  }
}

.team-section {
  background:
    radial-gradient(circle at 20% 50%, rgba(24, 185, 255, 0.1), transparent 30%),
    radial-gradient(circle at 80% 50%, rgba(255, 191, 82, 0.07), transparent 30%),
    var(--bg);
}

.team-callout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
}

.team-callout h2 {
  max-width: 720px;
}

.team-actions {
  flex: 0 0 auto;
  margin: 0;
}

footer {
  padding: 45px 0;
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 50px;
  align-items: center;
}

.footer-grid strong { font-size: 1rem; }
.footer-grid strong span { color: var(--blue-light); }
.footer-grid p { margin: 3px 0 0; color: var(--muted); font-size: 0.76rem; }
.footer-links { display: flex; gap: 24px; color: var(--muted-strong); font-size: 0.8rem; }
.footer-credit { text-align: right; }

@media (max-width: 960px) {
  .site-nav {
    position: absolute;
    top: 68px;
    right: 22px;
    left: 22px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(5, 14, 25, 0.97);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px; }
  .site-nav .nav-cta { margin-top: 4px; text-align: center; }
  .nav-toggle { display: block; }
  .split-heading { grid-template-columns: 1fr; gap: 24px; }
  .failure-grid { grid-template-columns: repeat(2, 1fr); }
  .ladder { grid-template-columns: 1fr; }
  .ladder-card { min-height: auto; }
  .ladder-card dl { position: static; margin-top: 38px; }
  .quickstart-layout { grid-template-columns: 1fr; }
  .team-callout { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr auto; }
  .footer-credit { grid-column: 1 / -1; text-align: left; }
}

@media (max-width: 680px) {
  :root { --shell: min(100% - 28px, 1180px); }
  .section { padding: 86px 0; }
  .hero { min-height: 760px; }
  .hero-art {
    object-position: 62% center;
    opacity: 0.38;
    animation: none;
    transform: scale(1.05);
  }
  .hero-grid { animation-duration: 36s; }
  .hero-shade {
    background:
      linear-gradient(90deg, rgba(3, 9, 18, 0.98), rgba(3, 9, 18, 0.72)),
      linear-gradient(0deg, var(--bg), transparent 36%);
  }
  .hero h1 { font-size: clamp(3rem, 15vw, 4.8rem); }
  .hero-copy { font-size: 1rem; }
  .failure-grid { grid-template-columns: 1fr; }
  .failure-card { min-height: 210px; }
  .leaderboard-toolbar, .leaderboard-note { align-items: stretch; flex-direction: column; }
  .setting-tabs { width: 100%; }
  .setting-tabs button { min-width: 0; flex: 1; }
  th, td { padding: 13px 14px; }
  td:first-child { width: 48px; }
  .method-cell { min-width: 168px; }
  .score-cell { min-width: 145px; }
  .terminal-card pre { padding: 20px; font-size: 0.71rem; }
  .team-actions { width: 100%; }
  .team-actions .button { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .motion-ready .reveal-item {
    opacity: 1 !important;
    transform: none !important;
  }
}