@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("/assets/fonts/AtkinsonHyperlegible-normal-400-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("/assets/fonts/AtkinsonHyperlegible-normal-700-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("/assets/fonts/JetBrainsMono-normal-500-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --night: #050505;
  --night-soft: #090909;
  --paper: #f5f5f3;
  --muted: #a6a6a5;
  --subtle: #777776;
  --line: rgba(255, 255, 255, .105);
  --glass-fill: rgba(255, 255, 255, .045);
  --glass-shine: rgba(255, 255, 255, .13);
  --mono: "JetBrains Mono", Consolas, monospace;
  --sans: "Atkinson Hyperlegible", "Segoe UI", sans-serif;
  --page-width: 1240px;
  --gutter: clamp(22px, 5.4vw, 88px);
  --ease: cubic-bezier(.16, 1, .3, 1);
  --motion-fast: 180ms;
  --motion-state: 240ms;
  --motion-enter: 680ms;
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scrollbar-color: #515151 var(--night);
  scrollbar-width: thin;
  background: var(--night);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--paper);
  background:
    radial-gradient(70rem 42rem at 50% -15rem, rgba(108, 111, 116, .12), transparent 68%),
    radial-gradient(65rem 36rem at 92% 58%, rgba(82, 82, 82, .035), transparent 72%),
    var(--night);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: 20;
  pointer-events: none;
  content: "";
  inset: 0;
  opacity: .1;
  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='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.23'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

::selection { color: #050505; background: #f4f4f0; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid #eee; outline-offset: 4px; }

.skip-link {
  position: fixed;
  z-index: 99;
  top: 12px;
  left: 12px;
  padding: 10px 15px;
  transform: translateY(-160%);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #151515;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: absolute;
  z-index: 5;
  top: 0;
  left: 50%;
  display: flex;
  width: min(100%, 1600px);
  height: 88px;
  padding: 0 var(--gutter);
  align-items: center;
  justify-content: space-between;
  transform: translateX(-50%);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.055em;
}

.wordmark-glyph {
  display: block;
  width: 32px;
  height: 32px;
  object-fit: contain;
  filter: drop-shadow(0 0 9px rgba(255,255,255,.12));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 42px);
  color: #c2c2c1;
  font-size: 14px;
}
.site-nav > a:not(.nav-cta) { transition: color .25s ease; }
.site-nav > a:not(.nav-cta):hover { color: #fff; }
.nav-cta {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 17px;
  padding: 0 17px;
  border: 1px solid rgba(255,255,255,.17);
  border-radius: 999px;
  color: #f8f8f7;
  background: linear-gradient(145deg, rgba(255,255,255,.115), rgba(255,255,255,.035));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.11), 0 4px 24px rgba(0,0,0,.25);
  backdrop-filter: blur(18px) saturate(145%);
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}
.nav-cta:hover { transform: translateY(-2px); border-color: rgba(255,255,255,.32); background: rgba(255,255,255,.12); }
.nav-cta span { color: #bdbdbb; font-size: 17px; }

.hero {
  position: relative;
  display: flex;
  min-height: max(760px, 100svh);
  padding: 148px var(--gutter) 110px;
  overflow: hidden;
  align-items: flex-start;
  justify-content: center;
  isolation: isolate;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: min(100%, 920px);
  text-align: center;
}

@keyframes hero-scene-in {
  from { opacity: 0; transform: translate3d(0, 18px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@keyframes hero-copy-in {
  from { opacity: 0; transform: translate3d(0, 20px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@keyframes signal-in {
  from { opacity: 0; transform: scale(.86); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes reveal-rise {
  from { opacity: 0; transform: translate3d(0, 18px, 0); }
  to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@keyframes probe-ring-in {
  from { opacity: 0; transform: scale(.82); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes path-draw-in {
  from { opacity: .25; stroke-dasharray: 420; stroke-dashoffset: 420; }
  to { opacity: 1; stroke-dasharray: 420; stroke-dashoffset: 0; }
}
@keyframes note-sheet-in {
  from { opacity: 0; transform: translate3d(0, 14px, 0) rotateX(12deg) rotateZ(-4deg); }
  to { opacity: 1; transform: rotateX(9deg) rotateZ(-4deg); }
}
@keyframes probe-ripple {
  0%, 100% { opacity: var(--ripple-rest, .35); transform: scale(.99); }
  50% { opacity: var(--ripple-peak, .18); transform: scale(1.035); }
}
@keyframes route-dash-flow { to { stroke-dashoffset: -27; } }
@keyframes map-light-travel {
  0% { opacity: 0; stroke-dashoffset: 324; }
  12% { opacity: .78; }
  84% { opacity: .6; }
  100% { opacity: 0; stroke-dashoffset: 0; }
}
@keyframes note-sheet-drift {
  0%, 100% { transform: translate3d(0, 0, 0) rotateX(9deg) rotateZ(-4deg); }
  50% { transform: translate3d(0, -4px, 0) rotateX(9deg) rotateZ(-3.5deg); }
}
@keyframes note-lines-breathe {
  0%, 100% { opacity: .62; transform: scaleX(.99); }
  50% { opacity: .8; transform: scaleX(1); }
}

.hero-stage { animation: hero-scene-in 1050ms var(--ease) both; }
.hero-copy h1 { animation: hero-copy-in 760ms var(--ease) 160ms both; }
.hero-lede { animation: hero-copy-in 620ms var(--ease) 340ms both; }
.hero-actions { animation: hero-copy-in 620ms var(--ease) 480ms both; }
.signal-core { animation: signal-in 640ms var(--ease) 650ms both; }

.hero h1 {
  max-width: 1000px;
  margin: 0 auto;
  color: #f6f6f4;
  font-size: clamp(54px, 8.5vw, 110px);
  font-weight: 700;
  letter-spacing: -.075em;
  line-height: .99;
}
.hero h1 span {
  color: transparent;
  background: linear-gradient(180deg, #fff 5%, #c9c9c8 86%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-lede {
  max-width: 620px;
  margin: 23px auto 0;
  color: #b2b2b0;
  font-size: clamp(16px, 1.65vw, 19px);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  margin-top: 28px;
  align-items: center;
  justify-content: center;
  gap: 11px;
}

.button {
  position: relative;
  display: inline-flex;
  min-height: 49px;
  align-items: center;
  justify-content: center;
  gap: 19px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  transition: transform .28s var(--ease), border-color .28s ease, background .28s ease, box-shadow .28s ease;
}
.button:hover { transform: translateY(-2px); }
.button span { font-size: 16px; transition: transform .25s ease; }
.button:hover span { transform: translate(2px, -1px); }
.button-light {
  color: #141414;
  background: linear-gradient(180deg, #fff, #dededc);
  box-shadow: 0 5px 26px rgba(255,255,255,.16), inset 0 1px 0 rgba(255,255,255,.9);
}
.button-light:hover { box-shadow: 0 8px 32px rgba(255,255,255,.25), inset 0 1px 0 #fff; }
.button-glass {
  border-color: rgba(255,255,255,.13);
  color: #e8e8e6;
  background: linear-gradient(140deg, rgba(255,255,255,.09), rgba(255,255,255,.025));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12);
  backdrop-filter: blur(16px) saturate(155%);
}
.button-glass:hover { border-color: rgba(255,255,255,.27); background: rgba(255,255,255,.11); }

.hero-stage {
  position: absolute;
  z-index: 0;
  inset: 31% 0 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-stage::before {
  position: absolute;
  z-index: 2;
  content: "";
  inset: 0;
  background: linear-gradient(180deg, var(--night) 0%, rgba(5,5,5,.45) 14%, transparent 37%, rgba(5,5,5,.1) 76%, var(--night) 100%);
}
.hero-stage::after {
  position: absolute;
  z-index: 2;
  content: "";
  inset: 0;
  background: linear-gradient(90deg, var(--night) 0%, transparent 17%, transparent 83%, var(--night) 100%);
}
#contour-field { position: absolute; inset: 0; width: 100%; height: 100%; }
.learning-signal {
  position: absolute;
  z-index: 3;
  top: 61%;
  left: 50%;
  display: grid;
  justify-items: center;
  transform: translate(-50%, -50%);
}
.signal-core {
  display: grid;
  width: 76px;
  height: 76px;
  place-items: center;
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 23px;
  background:
    radial-gradient(ellipse at 28% 16%, rgba(255,255,255,.17), transparent 54%),
    linear-gradient(145deg, rgba(255,255,255,.1), rgba(255,255,255,.02));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.34), inset 0 -12px 20px rgba(0,0,0,.3), 0 14px 42px rgba(255,255,255,.13);
  backdrop-filter: blur(18px) saturate(150%);
}
.hero-mark { display: block; width: 48px; height: 48px; object-fit: contain; }
.section-wrap { width: min(var(--page-width), calc(100% - var(--gutter) - var(--gutter))); margin-inline: auto; }
.method-section { padding-top: clamp(100px, 15vw, 195px); padding-bottom: clamp(120px, 16vw, 210px); }
.section-heading { max-width: 660px; margin: 0 auto 55px; text-align: center; }
.section-heading h2,
.sample-copy h2,
.privacy-copy h2,
.closing-section h2 {
  margin: 0;
  font-size: clamp(42px, 6.3vw, 74px);
  font-weight: 700;
  letter-spacing: -.065em;
  line-height: 1.01;
}
.section-heading h2 span,
.sample-copy h2 span,
.privacy-copy h2 span,
.closing-section h2 span { color: #a9a9a7; }
.section-heading > p:last-child { max-width: 530px; margin: 19px auto 0; color: #a4a4a2; font-size: 16px; line-height: 1.65; }

.method-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; }
.glass-surface {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.1);
  background:
    radial-gradient(ellipse at var(--pointer-x, 50%) var(--pointer-y, 0%), rgba(255,255,255,.105), transparent 54%),
    linear-gradient(150deg, rgba(255,255,255,.07), rgba(255,255,255,.018) 44%, rgba(255,255,255,.035));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.12), inset 0 -1px 0 rgba(255,255,255,.025), 0 22px 70px rgba(0,0,0,.24);
  backdrop-filter: blur(22px) saturate(145%);
  -webkit-backdrop-filter: blur(22px) saturate(145%);
}
.glass-surface::before {
  position: absolute;
  z-index: -1;
  content: "";
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  background: linear-gradient(140deg, rgba(255,255,255,.11), transparent 22%, transparent 74%, rgba(255,255,255,.035));
  opacity: .42;
}
.glass-surface::after {
  position: absolute;
  z-index: -1;
  content: "";
  inset: 1px;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.025);
}

.method-card {
  min-height: 420px;
  padding: 0 clamp(22px, 3vw, 42px);
}
.method-card:nth-child(2) { --reveal-delay: 75ms; }
.method-card:nth-child(3) { --reveal-delay: 150ms; }
.motion-enter { animation: reveal-rise var(--motion-enter) var(--ease) both; animation-delay: var(--reveal-delay, 0ms); }
.method-card.motion-enter .probe-ring {
  animation-name: probe-ring-in, probe-ripple;
  animation-duration: 820ms, 6.9s;
  animation-timing-function: var(--ease), ease-in-out;
  animation-delay: 0ms, 850ms;
  animation-iteration-count: 1, infinite;
  animation-fill-mode: both, none;
}
.method-card.motion-enter .ring-two { animation-delay: 65ms, 1550ms; }
.method-card.motion-enter .ring-three { animation-delay: 130ms, 2250ms; }
.method-card.motion-enter .probe-point { animation: signal-in 520ms var(--ease) 190ms both; }
.method-card.motion-enter .map-branch:not(.map-branch-dim):not(.map-flow) { animation: path-draw-in 975ms linear 90ms both; }
.method-card.motion-enter .map-branch-dim { animation: route-dash-flow 21s linear infinite; }
.method-card.motion-enter .map-flow { animation: map-light-travel 7.5s linear 1s infinite; }
.method-card.motion-enter .note-sheet {
  animation: note-sheet-in 820ms var(--ease) 140ms both, note-sheet-drift 8.25s ease-in-out 1s infinite;
}
.method-card.motion-enter .note-line {
  transform-origin: left center;
  animation: note-lines-breathe 7.125s ease-in-out 2.2s infinite;
}
.method-card.motion-enter .line-medium { animation-delay: 2.9s; }
.method-card.motion-enter .line-short { animation-delay: 3.6s; }
.method-card:first-child { padding-left: 0; }
.method-card + .method-card { border-left: 1px solid rgba(255,255,255,.105); }
.method-card:last-child { padding-right: 0; }
.card-visual {
  position: relative;
  display: grid;
  height: 208px;
  margin: 0 0 15px;
  place-items: center;
  overflow: hidden;
}
.method-card h3 { margin: 0; font-size: 19px; font-weight: 700; letter-spacing: -.035em; }
.method-card > p { margin: 9px 0 0; color: #a0a09e; font-size: 14px; line-height: 1.55; }

.probe-visual { background: radial-gradient(ellipse at 50% 64%, rgba(212,215,220,.105), transparent 54%); }
.probe-ring { position: absolute; width: 86px; aspect-ratio: 1; border: 1px solid rgba(236,237,238,.18); border-radius: 50%; box-shadow: inset 0 0 22px rgba(255,255,255,.025); }
.ring-one { width: 63px; border-color: rgba(255,255,255,.54); box-shadow: 0 0 26px rgba(255,255,255,.13), inset 0 0 20px rgba(255,255,255,.09); --ripple-rest: .72; --ripple-peak: .43; }
.ring-two { width: 104px; --ripple-rest: .42; --ripple-peak: .24; }
.ring-three { width: 156px; border-style: dashed; border-color: rgba(255,255,255,.1); --ripple-rest: .22; --ripple-peak: .12; }
.probe-point { position: absolute; width: 8px; height: 8px; border-radius: 50%; background: #f7f7f5; box-shadow: 0 0 13px #fff, 0 0 45px rgba(255,255,255,.7); }
.map-visual svg { width: 100%; max-width: 330px; overflow: visible; fill: #f0f0ed; stroke: rgba(250,250,248,.55); stroke-width: 1.4; }
.map-branch { fill: none; stroke: rgba(239,239,236,.7); stroke-width: 1.3; }
.map-branch-dim { stroke: rgba(255,255,255,.16); stroke-dasharray: 3 6; }
.map-flow { fill: none; stroke: rgba(255,255,255,.88); stroke-width: 2.6; stroke-linecap: round; stroke-dasharray: 3 321; stroke-dashoffset: 324; opacity: 0; }
.map-node-faint { fill: #8b8b89; stroke: rgba(255,255,255,.2); }
.notes-visual { perspective: 650px; }
.note-sheet {
  display: flex;
  width: 64%;
  min-height: 141px;
  padding: 17px 19px;
  flex-direction: column;
  align-items: flex-start;
  gap: 11px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 9px;
  background: linear-gradient(145deg, rgba(255,255,255,.1), rgba(255,255,255,.025));
  box-shadow: 0 18px 42px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.18);
  transform: rotateX(9deg) rotateZ(-4deg);
}
.note-line { display: block; height: 3px; border-radius: 3px; background: rgba(240,240,237,.22); }
.line-wide { width: 86%; }.line-medium { width: 65%; }.line-short { width: 38%; }
.note-equation { margin-top: 1px; color: #f2f2ef; font-family: var(--mono); font-size: 12px; letter-spacing: -.06em; }
.note-equation i { padding: 0 4px; color: #bdbdbb; font-style: normal; }
.note-spark { position: absolute; right: 21%; bottom: 25%; width: 8px; height: 8px; border: 1px solid rgba(255,255,255,.72); border-radius: 50%; box-shadow: 0 0 19px rgba(255,255,255,.7); }

.sample-section {
  display: grid;
  padding-top: 20px;
  padding-bottom: clamp(125px, 17vw, 220px);
  align-items: center;
  grid-template-columns: minmax(250px, .72fr) minmax(0, 1.28fr);
  gap: clamp(45px, 9vw, 130px);
}
.sample-copy { max-width: 390px; }
.sample-copy h2 { font-size: clamp(42px, 5vw, 62px); }
.sample-copy > p { margin: 20px 0 0; color: #a4a4a2; font-size: 15px; line-height: 1.75; }
.lesson-panel { padding: 27px 29px 21px; border-radius: 20px; }
.lesson-panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.lesson-panel-head h3 { margin: 0; font-size: 20px; letter-spacing: -.035em; }
.goal-equation { color: #c7c7c4; font-size: 14px; white-space: nowrap; }
.lesson-question { display: block; margin-top: 25px; padding: 19px 0 22px; border-top: 1px solid rgba(255,255,255,.075); border-bottom: 1px solid rgba(255,255,255,.075); }
.question-title { max-width: 520px; margin: 1px 0 3px; color: #e2e2df; font-size: 14px; font-weight: 700; }
.question-description { max-width: 520px; margin: 0 0 14px; color: #a5a5a2; font-size: 12px; line-height: 1.5; }
.answer-options { display: flex; margin: 0; padding: 0; border: 0; align-items: center; flex-wrap: wrap; gap: 8px; }
.answer-options legend { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; clip-path: inset(50%); }
.answer-choice { min-height: 33px; padding: 0 12px; border: 1px solid rgba(255,255,255,.11); border-radius: 999px; color: #b5b5b2; background: rgba(0,0,0,.2); cursor: pointer; font-size: 11px; transition: border-color .2s ease, color .2s ease, background .2s ease, box-shadow .2s ease; }
.answer-choice:hover { border-color: rgba(255,255,255,.3); color: #fff; }
.answer-choice.is-selected { border-color: rgba(255,255,255,.44); color: #fff; background: rgba(255,255,255,.13); box-shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 0 18px rgba(255,255,255,.07); }
.lesson-route { position: relative; padding: 24px 0 8px; }
.route-line { position: absolute; top: 32px; right: 13%; left: 13%; height: 1px; background: linear-gradient(90deg, rgba(255,255,255,.2), rgba(255,255,255,.45), rgba(255,255,255,.16)); }
.route-line span { position: absolute; top: 50%; width: 6px; height: 6px; border: 1px solid rgba(255,255,255,.65); border-radius: 50%; background: #111; box-shadow: 0 0 8px rgba(255,255,255,.3); transform: translate(-50%,-50%); transition: transform var(--motion-state) var(--ease), background-color var(--motion-state) ease, box-shadow var(--motion-state) ease; }
.route-line span:nth-child(1) { left: 0; }.route-line span:nth-child(2) { left: 50%; }.route-line span:nth-child(3) { left: 100%; }
.lesson-panel[data-state="known"] .route-line span:nth-child(2),
.lesson-panel[data-state="review"] .route-line span:nth-child(1) { background: #e5e5e2; box-shadow: 0 0 15px rgba(255,255,255,.65); transform: translate(-50%,-50%) scale(1.4); }
.route-steps { display: grid; margin: 0; padding: 0; list-style: none; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.route-steps li { position: relative; display: flex; padding-top: 26px; flex-direction: column; gap: 3px; }
.route-steps strong { color: #d8d8d5; font-size: 13px; font-weight: 700; transition: color var(--motion-state) ease; }
.route-steps [data-state="past"] strong { color: #b7b7b4; }
.route-steps [data-state="future"] strong { color: #8e8e8c; }
.route-steps [data-state="current"] strong { color: #fff; }
.lesson-panel[data-state="review"] .route-line { background: linear-gradient(90deg, rgba(255,255,255,.45), rgba(255,255,255,.2), rgba(255,255,255,.16)); }
.lesson-status { min-height: 20px; margin: 16px 0 0; color: #b8b8b5; font-size: 13px; line-height: 1.5; }

.privacy-section { padding-bottom: clamp(110px, 15vw, 190px); }
.privacy-panel { display: grid; min-height: 400px; padding: clamp(32px, 6vw, 72px); align-items: center; border-radius: 25px; grid-template-columns: 1fr 1fr; gap: 8%; }
.privacy-art { position: relative; display: grid; min-height: 280px; place-items: center; overflow: hidden; border: 1px solid rgba(255,255,255,.055); border-radius: 18px; background: radial-gradient(ellipse at 50% 50%, rgba(255,255,255,.09), rgba(255,255,255,.025) 43%, transparent 74%); }
.privacy-orbit { position: absolute; border: 1px solid rgba(255,255,255,.12); border-radius: 50%; transform: rotate(-22deg); }
.orbit-a { width: 210px; height: 90px; }.orbit-b { width: 260px; height: 122px; transform: rotate(28deg); }.orbit-c { width: 160px; height: 160px; border-style: dashed; border-color: rgba(255,255,255,.08); }
.privacy-node { position: absolute; width: 7px; height: 7px; border-radius: 50%; background: #e7e7e4; box-shadow: 0 0 12px rgba(255,255,255,.65); }
.node-a { top: 30%; left: 29%; }.node-b { top: 67%; right: 29%; width: 5px; height: 5px; opacity: .7; }.node-c { top: 20%; right: 38%; width: 4px; height: 4px; opacity: .55; }
.privacy-core { display: flex; width: 66px; height: 66px; align-items: center; justify-content: center; gap: 5px; border: 1px solid rgba(255,255,255,.22); border-radius: 18px; background: linear-gradient(150deg, rgba(255,255,255,.15), rgba(255,255,255,.035)); box-shadow: inset 0 1px 0 rgba(255,255,255,.28), 0 0 48px rgba(255,255,255,.12); backdrop-filter: blur(14px); }
.privacy-core span { width: 5px; height: 5px; border-radius: 50%; background: #f4f4f1; box-shadow: 0 0 8px rgba(255,255,255,.55); }
.privacy-core span:nth-child(2) { width: 8px; height: 8px; }
.privacy-copy { max-width: 430px; }
.privacy-copy h2 { font-size: clamp(40px, 5vw, 62px); }
.privacy-copy > p { margin: 18px 0 0; color: #a2a2a0; font-size: 15px; line-height: 1.75; }

.closing-section { position: relative; display: flex; min-height: 480px; padding: 100px var(--gutter) 78px; overflow: hidden; flex-direction: column; align-items: center; justify-content: center; text-align: center; isolation: isolate; }
.closing-section::before { position: absolute; z-index: -1; content: ""; inset: 0; background: radial-gradient(ellipse at 50% 75%, rgba(218,220,224,.12), transparent 48%); }
.closing-section h2 { margin: 0 0 27px; font-size: clamp(48px, 7vw, 80px); }

.site-footer { display: flex; width: min(100%, 1600px); min-height: 90px; margin-inline: auto; padding: 20px var(--gutter); align-items: center; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.075); color: #969694; }
.site-footer .wordmark { color: #eee; font-size: 16px; }
.site-footer .wordmark-glyph { width: 27px; height: 27px; }
.site-footer > a:last-child { font-size: 12px; transition: color .2s ease; }
.site-footer > a:last-child:hover { color: #fff; }
.site-footer > a:last-child span { padding-left: 5px; color: #c6c6c3; }

@media (max-width: 900px) {
  .hero { min-height: max(730px, 100svh); }
  .hero-stage { inset-block-start: 35%; }
  .method-card { min-height: 420px; padding-inline: 20px; }
  .card-visual { height: 183px; }
  .sample-section { grid-template-columns: minmax(220px, .7fr) minmax(0, 1.3fr); gap: 35px; }
  .lesson-panel { padding: 23px 21px 19px; }
  .privacy-panel { gap: 5%; }
}

@media (max-width: 680px) {
  :root { --gutter: 21px; }
  .site-header { height: 72px; }
  .site-nav { gap: 13px; }
  .site-nav > a:not(.nav-cta) { display: none; }
  .nav-cta { min-height: 38px; gap: 9px; padding: 0 13px; font-size: 12px; }
  .hero { min-height: max(760px, 100svh); padding-top: 143px; }
  .hero h1 { font-size: clamp(49px, 12.4vw, 74px); letter-spacing: -.075em; }
  .hero-lede { max-width: 420px; margin-top: 19px; font-size: 15px; }
  .hero-actions { margin-top: 23px; flex-wrap: wrap; }
  .button { min-height: 46px; padding-inline: 16px; font-size: 13px; }
  .hero-stage { inset: 39% -16% 0; }
  .signal-core { width: 64px; height: 64px; border-radius: 19px; }
  .hero-mark { width: 42px; height: 42px; }
  .learning-signal { top: 62%; }
  .method-section { padding-top: 100px; padding-bottom: 120px; }
  .section-heading { margin-bottom: 35px; }
  .section-heading h2, .sample-copy h2, .privacy-copy h2 { font-size: clamp(41px, 10vw, 58px); }
  .section-heading > p:last-child { max-width: 410px; font-size: 14px; }
  .method-grid { grid-template-columns: 1fr; gap: 0; }
  .method-card,
  .method-card:first-child,
  .method-card:last-child { min-height: auto; padding: 24px 0; }
  .method-card:first-child { padding-top: 0; }
  .method-card + .method-card { border-top: 1px solid rgba(255,255,255,.105); border-left: 0; }
  .card-visual { height: 180px; margin-top: 0; }
  .method-card > p { max-width: 460px; }
  .sample-section { padding-top: 0; padding-bottom: 120px; grid-template-columns: 1fr; gap: 34px; }
  .sample-copy { max-width: 510px; }
  .sample-copy > p { max-width: 470px; font-size: 14px; }
  .lesson-panel { padding: 20px 17px 17px; border-radius: 17px; }
  .lesson-panel-head { flex-direction: column; gap: 13px; }
  .goal-equation { white-space: normal; }
  .lesson-question { margin-top: 19px; }
  .question-title { font-size: 13px; }
  .answer-choice { padding-inline: 10px; font-size: 12px; }
  .route-line { right: 12%; left: 12%; }
  .route-steps { gap: 6px; }
  .route-steps strong { font-size: 11px; }
  .lesson-status { font-size: 12px; }
  .privacy-section { padding-bottom: 110px; }
  .privacy-panel { padding: 20px; grid-template-columns: 1fr; gap: 28px; }
  .privacy-art { min-height: 230px; }
  .privacy-copy { padding: 0 3px 10px; }
  .privacy-copy > p { font-size: 14px; }
  .closing-section { min-height: 420px; padding-block: 80px 64px; }
  .closing-section h2 { font-size: clamp(47px, 11vw, 66px); }
  .site-footer { min-height: 80px; flex-wrap: wrap; gap: 10px 20px; }
}

@media (max-width: 380px) {
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero { padding-top: 130px; }
  .route-steps strong { font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}

/* Public-page extensions to the approved Luna material system. */
.site-header { position: relative; left: auto; margin-inline: auto; transform: none; }
.home-page .site-header { position: absolute; left: 50%; transform: translateX(-50%); }
.wordmark { letter-spacing: -.035em; }
.site-nav svg, .button svg { flex: 0 0 auto; }
.site-nav [aria-current="page"] { color: var(--paper); text-decoration: underline; text-underline-offset: 7px; }
.menu-toggle { display: none; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 50%; background: #141414; cursor: pointer; }
.text-link { display: inline-flex; align-items: center; gap: 14px; color: var(--paper); font-size: 14px; text-underline-offset: 5px; }
.text-link:hover { text-decoration: underline; }
.button:disabled { cursor: not-allowed; opacity: .65; transform: none; box-shadow: none; }
.hero { min-height: 780px; max-height: 1040px; padding-top: 150px; }
.hero h1 { font-size: clamp(50px,7vw,96px); letter-spacing: -.04em; }
.hero h1 span, h2 span { color: #a6a6a5; background: none; -webkit-text-fill-color: currentColor; background-clip: border-box; }
h2, .section-heading h2, .sample-copy h2, .closing-section h2 { letter-spacing: -.035em; }
.hero-lede { max-width: 580px; }
.method-section { padding-block: 72px 80px; }
.method-card { min-height: 330px; }
.sample-section { padding-bottom: 100px; }
.keep-section { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; padding-bottom: 90px; }
.keep-section h2 { margin: 0; font-size: clamp(38px,5vw,60px); line-height: 1.05; letter-spacing: -.035em; }
.keep-section h2 span, .page-intro h1 span { color: #a6a6a5; }
.keep-section > div > p { max-width: 400px; color: var(--muted); margin-block: 22px; }
.feature-list { margin: 0; }
.feature-list > div { padding: 20px 0; border-top: 1px solid var(--line); }
.feature-list dt { font-size: 18px; font-weight: 700; }
.feature-list dd { color: var(--muted); margin: 7px 0 0; max-width: 400px; font-size: 14px; }
.closing-section { min-height: 330px; padding-block: 58px 65px; }
.closing-section h2 { font-size: clamp(38px,5vw,60px); }
.quiet { color: var(--muted); font-size: 13px; line-height: 1.6; }
.example-label { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.method-card.motion-enter .probe-ring { animation-duration: 820ms, 18s; }
.method-card.motion-enter .map-branch-dim { animation: none; }
.method-card.motion-enter .map-flow { animation-duration: 22s; }
.method-card.motion-enter .note-sheet { animation: note-sheet-in 820ms var(--ease) 140ms both; }
.method-card.motion-enter .note-line { animation: none; }
.site-footer { display: block; padding-block: 34px 25px; }
.footer-top, .footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.footer-top > p { margin: 0; font-size: 14px; color: var(--muted); }
.footer-links { display: flex; flex-wrap: wrap; gap: 14px 26px; margin-block: 28px; font-size: 13px; }
.footer-links a:hover, .footer-bottom a:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 18px; font-size: 12px; color: var(--muted); }
.footer-bottom p { margin: 0; }
.page-intro { padding-top: 80px; padding-bottom: 58px; }
.page-intro h1 { margin: 0; max-width: 1000px; font-size: clamp(44px,6.5vw,80px); line-height: 1.04; letter-spacing: -.04em; text-wrap: balance; }
.page-lede { max-width: 620px; margin: 25px 0 0; color: #b4b4b2; font-size: 18px; line-height: 1.65; }
.page-meta { margin: 22px 0 0; color: var(--muted); font-size: 13px; }
.page-content { padding-bottom: 110px; }
.detail-row { display: grid; grid-template-columns: .85fr 1.15fr; gap: 70px; padding-block: 36px; border-top: 1px solid var(--line); }
.detail-row h2 { margin: 0; font-size: clamp(24px,3vw,34px); font-weight: 400; line-height: 1.22; letter-spacing: -.025em; }
.detail-row p { color: #b0b0ae; max-width: 65ch; margin: 0; line-height: 1.75; }
.detail-row p + p, .detail-row .text-link { margin-top: 14px; }
.source-note { max-width: 780px; margin-top: 50px; }
.source-note h2, .faq-list h2, .requirements h2, .access-section h2 { font-size: 29px; line-height: 1.2; font-weight: 400; letter-spacing: -.025em; }
.source-note p, .source-list { color: #b0b0ae; line-height: 1.8; }
.source-list { padding-left: 20px; }
.source-list li { padding-left: 5px; margin-bottom: 12px; }
.page-content p a:not(.button):not(.text-link), .source-list a { color: var(--paper); text-decoration: underline; text-decoration-color: #747473; text-underline-offset: 4px; }
.inline-cta { display: flex; flex-wrap: wrap; gap: 25px; align-items: center; margin-top: 50px; padding-top: 30px; border-top: 1px solid var(--line); }
.inline-cta p { margin: 0; color: var(--muted); }
.status-label { margin-bottom: 10px !important; color: var(--paper) !important; font-size: 13px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; align-items: stretch; }
.price-card { display: flex; flex-direction: column; padding: 31px 27px 24px; border: 1px solid #343434; border-radius: 20px; background: #0b0b0b; }
.price-card.featured { border-color: #727272; background: linear-gradient(150deg,#1b1b1b,#101010); box-shadow: 0 20px 55px rgba(0,0,0,.25); }
.price-card h2 { margin: 0; font-size: 21px; font-weight: 400; letter-spacing: -.02em; }
.price-card .price { margin: 24px 0 12px; color: var(--paper); font-size: clamp(36px,4vw,46px); line-height: 1.15; letter-spacing: -.035em; font-variant-numeric: tabular-nums; }
.price-card .price span { font-size: 13px; letter-spacing: 0; color: var(--muted); white-space: nowrap; }
.plan-description { margin: 0; color: var(--muted); font-size: 14px; }
.price-card ul { flex: 1; padding: 24px 0 24px 18px; margin: 0; color: #c3c3c0; font-size: 14px; }
.price-card li { margin-bottom: 11px; padding-left: 2px; }
.price-card .button { padding-inline: 13px; justify-content: center; gap: 9px; font-size: 13px; min-height: 46px; }
.plan-note { color: #aaa; font-size: 12px; line-height: 1.6; min-height: 38px; margin: 14px 0 0; }
.pricing-explainer { display: flex; gap: 70px; justify-content: space-between; padding: 27px 4px 0; }
.pricing-explainer > p { max-width: 660px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.pricing-explainer > p:last-child { display: flex; align-items: flex-start; flex-direction: column; gap: 7px; flex-shrink: 0; }
.faq-list { max-width: 780px; margin: 70px auto 0; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 22px 3px; cursor: pointer; font-size: 16px; }
.faq-list details p { max-width: 68ch; margin: 0; padding: 0 3px 22px; color: var(--muted); font-size: 15px; line-height: 1.75; }
.legal-prose { max-width: 740px; }
.legal-prose h2 { margin: 38px 0 12px; font-size: 24px; line-height: 1.3; font-weight: 400; letter-spacing: -.02em; }
.legal-prose h2:first-child { margin-top: 0; }
.legal-prose p, .legal-prose li { color: #b9b9b7; font-size: 16px; line-height: 1.8; }
.legal-prose p { margin: 0 0 16px; }
.legal-prose ul { padding-left: 21px; }
.legal-prose li { padding-left: 4px; margin-bottom: 11px; }
.contact-panel { max-width: 820px; padding: clamp(25px,5vw,48px); border-radius: 22px; }
.contact-panel h2 { margin: 0 0 22px; font-size: 20px; font-weight: 400; }
.contact-address { display: flex; align-items: center; gap: 20px; width: fit-content; max-width: 100%; font-size: clamp(18px,3.5vw,34px); letter-spacing: -.03em; overflow-wrap: anywhere; }
.contact-address svg { flex-shrink: 0; }
.contact-panel p { color: var(--muted); max-width: 62ch; font-size: 14px; margin-top: 24px; }
.download-panel { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding: 32px; border-radius: 22px; }
.download-panel h2 { margin: 0; font-weight: 400; font-size: 24px; }
.download-panel p { color: var(--muted); }
.download-panel > div:last-child { max-width: 350px; }
.access-section, .requirements { margin-top: 64px; }
.access-steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px; margin: 32px 0; padding: 0; list-style: none; counter-reset: steps; }
.access-steps li { counter-increment: steps; border-top: 1px solid var(--line); padding-top: 19px; }
.access-steps li::before { content: counter(steps); color: var(--muted); font-size: 13px; }
.access-steps h3 { font-size: 18px; font-weight: 400; margin: 13px 0; }
.access-steps p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.requirements dl { max-width: 860px; }
.requirements dl > div { display: grid; grid-template-columns: 160px 1fr; border-top: 1px solid var(--line); padding-block: 20px; }
.requirements dt { font-size: 15px; }
.requirements dd { color: var(--muted); font-size: 14px; margin: 0; }
@media(min-width: 1600px) { .hero { min-height: 880px; } }
@media(max-width: 900px) { .pricing-grid { gap: 12px; }.price-card { padding: 26px 18px 20px; }.detail-row { gap: 35px; }.keep-section { gap: 40px; } }
@media(max-width: 680px) {
  .menu-toggle { display: inline-flex; }
  .site-nav { display: flex; position: absolute; top: 68px; left: var(--gutter); right: var(--gutter); padding: 16px; gap: 8px; flex-direction: column; align-items: stretch; border: 1px solid #414141; border-radius: 17px; background: #141414; box-shadow: 0 16px 40px rgba(0,0,0,.6); z-index: 12; }
  .site-nav > a:not(.nav-cta) { display: block; padding: 11px 8px; }
  .site-nav > .nav-cta { justify-content: space-between; min-height: 44px; }
  .js .site-nav:not(.is-open) { display: none; }
  body:not(.js-ready) .site-nav { position: static; flex-wrap: wrap; flex-direction: row; padding: 6px; border: 0; background: transparent; box-shadow: none; }
  body:not(.js-ready) .site-header { height: auto; min-height: 72px; flex-wrap: wrap; }
  body:not(.js-ready) .menu-toggle { display: none; }
  .hero { min-height: 710px; padding-top: 140px; padding-bottom: 60px; }
  .hero h1 { font-size: clamp(43px,9.8vw,66px); }
  .hero-lede { max-width: 410px; font-size: 15px; }
  .hero-stage { inset-block-start: 34%; }
  .hero-actions .button { font-size: 13px; }
  .method-section { padding-block: 45px 65px; }
  .method-card { display: grid; grid-template-columns: 95px 1fr; column-gap: 18px; min-height: auto; padding-block: 22px; align-items: center; }
  .method-card .card-visual { grid-row: span 2; height: 130px; margin: 0; }
  .method-card h3 { align-self: end; font-size: 19px; }
  .method-card > p { align-self: start; font-size: 14px; }
  .card-visual .ring-three { width: 94px; }.card-visual .ring-two { width: 71px; }.card-visual .ring-one { width: 45px; }
  .map-visual svg { width: 130px; }.notes-visual .note-sheet { width: 87px; min-height: 90px; padding: 12px 9px; gap: 8px; }.note-equation { font-size: 7px; }.note-spark { display: none; }
  .sample-section { padding-bottom: 70px; }
  .keep-section { grid-template-columns: 1fr; gap: 30px; padding-bottom: 35px; }
  .closing-section { min-height: 330px; }
  .page-intro { padding-top: 54px; padding-bottom: 38px; }
  .page-lede { font-size: 16px; }
  .page-content { padding-bottom: 65px; }
  .detail-row { grid-template-columns: 1fr; gap: 15px; padding-block: 28px; }
  .detail-row h2 { font-size: 26px; }
  .pricing-grid { grid-template-columns: 1fr; gap: 20px; }
  .price-card { padding: 28px; }.price-card ul { padding-block: 23px; }.price-card .price { font-size: 43px; }.plan-note { min-height: 0; }
  .pricing-explainer { flex-direction: column; gap: 18px; padding-top: 22px; }
  .pricing-explainer > p:last-child { flex-direction: row; flex-wrap: wrap; gap: 15px; }
  .faq-list { margin-top: 45px; }
  .download-panel { align-items: stretch; flex-direction: column; padding: 25px; gap: 12px; }
  .download-panel .button { width: 100%; justify-content: center; }
  .access-steps { grid-template-columns: 1fr; gap: 14px; }.access-steps li { padding-top: 15px; }
  .requirements dl > div { grid-template-columns: 1fr; gap: 8px; }
  .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; gap: 12px; }
  .footer-links { gap: 14px 22px; font-size: 14px; }
}
/* Small explanatory drawings inherit the homepage's monochrome line work. */
.topic-illustration { width: min(100%, 260px); margin-top: 19px; color: #d8d8d6; }
.topic-illustration svg { width: 100%; height: auto; display: block; }
.illustration-muted { color: #777; }
.illustration-flow { stroke-dasharray: 7 8; animation: topic-flow 8s linear infinite; }
.illustration-point { animation: topic-point 6s ease-in-out infinite; }
.illustration-wave { transform-box: fill-box; transform-origin: center; animation: topic-wave 3.8s ease-in-out var(--delay, 0s) infinite; }
.topic-illustration * { animation-play-state: paused; }
.topic-illustration.is-visible * { animation-play-state: running; }
.page-hidden .topic-illustration * { animation-play-state: paused; }
@keyframes topic-flow { to { stroke-dashoffset: -60; } }
@keyframes topic-point { 50% { opacity: .45; } }
@keyframes topic-wave { 50% { transform: scaleY(.55); opacity: .6; } }
@media (max-width: 680px) { .topic-illustration { width: 190px; margin-top: 12px; margin-bottom: 12px; } }
@media (prefers-reduced-motion: reduce) { .topic-illustration * { animation: none !important; } }

/* Keep the download within reach while Account stays one clear navigation item. */
.header-actions { display:flex; align-items:center; gap:12px; margin-left:30px }
.site-header > .site-nav { margin-left:auto }
.nav-download { background:linear-gradient(165deg,#f8f8f6,#dededb); border-color:#f5f5f3; color:#141414; font-size:14px; font-weight:700; box-shadow:0 5px 22px #ffffff16,inset 0 1px 0 #fff; white-space:nowrap }
.nav-download:hover { background:#fff; color:#050505; border-color:#fff }
@media(max-width:900px) and (min-width:681px) {
  .site-nav { gap:20px }
  .header-actions { margin-left:22px }
}
@media(max-width:680px) {
  .header-actions { margin-left:auto; gap:10px }
  .header-actions .nav-download { min-height:40px; padding-inline:14px; gap:9px; font-size:13px }
  .header-actions .menu-toggle { flex:none }
  body:not(.js-ready) .site-header > .site-nav { width:100%; order:3; margin:0 }
  body:not(.js-ready) .header-actions { margin-left:auto }
}
@media(max-width:360px) {
  .header-actions { gap:8px }
  .header-actions .nav-download { padding-inline:12px }
  .header-actions .nav-download svg { display:none }
}