:root {
  color-scheme: light;
  --ink: #10251f;
  --ink-deep: #081713;
  --ink-soft: #50615a;
  --paper: #f7f5ef;
  --surface: #ffffff;
  --mint: #dcefe4;
  --mint-bright: #6fd0a9;
  --green: #1d765a;
  --green-dark: #125440;
  --blue: #8796f8;
  --blue-soft: #e8ebff;
  --sun: #f5c96b;
  --coral: #ef8e7f;
  --line: #d8dfd9;
  --content: 1240px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--paper);
  color: var(--ink);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 0;
  margin: 0;
  background: var(--paper);
}

a {
  color: inherit;
}

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

:focus-visible {
  outline: 3px solid var(--green-dark);
  outline-offset: 4px;
  box-shadow: 0 0 0 7px var(--sun);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--sun);
  color: var(--ink);
  font-weight: 800;
  transform: translateY(-180%);
}

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

.home-header {
  position: fixed;
  z-index: 30;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: calc(var(--content) + 64px);
  margin: 0 auto;
  padding: 22px 32px;
  color: var(--paper);
  transition: max-width 220ms ease, padding 220ms ease, background 220ms ease, border-color 220ms ease;
}

.home-header.is-scrolled {
  top: 10px;
  max-width: min(960px, calc(100% - 28px));
  padding: 11px 14px 11px 16px;
  border: 1px solid rgba(247, 245, 239, 0.14);
  border-radius: 18px;
  background: rgba(8, 23, 19, 0.9);
  box-shadow: 0 14px 45px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(16px);
}

.home-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.home-brand-mark {
  display: grid;
  grid-auto-flow: column;
  gap: 3px;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 2px solid var(--mint-bright);
  border-radius: 13px;
  color: var(--mint-bright);
  font-size: 0;
}

.home-brand-mark::before,
.home-brand-mark::after {
  width: 7px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 3px;
  content: "";
}

.home-brand strong,
.home-brand small {
  display: block;
}

.home-brand strong {
  font-size: 0.85rem;
  letter-spacing: 0.13em;
}

.home-brand small {
  margin-top: 3px;
  color: #b8c7c0;
  font-size: 0.56rem;
  letter-spacing: 0.12em;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid rgba(247, 245, 239, 0.35);
  border-radius: 999px;
  color: var(--paper);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
}

.header-cta:hover {
  border-color: var(--mint-bright);
  color: var(--mint-bright);
}

.home-hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  align-items: center;
  overflow: hidden;
  padding: 150px 32px 100px;
  background:
    radial-gradient(circle at 74% 40%, rgba(111, 208, 169, 0.11), transparent 31%),
    linear-gradient(135deg, var(--ink-deep), var(--ink) 72%);
  color: var(--paper);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  gap: clamp(36px, 7vw, 100px);
  align-items: center;
  width: 100%;
  max-width: var(--content);
  margin: 0 auto;
}

.home-eyebrow {
  margin-bottom: 14px;
  color: var(--green);
  font-size: 0.69rem;
  font-weight: 850;
  letter-spacing: 0.15em;
}

.home-hero .home-eyebrow,
.final-section .home-eyebrow {
  color: var(--mint-bright);
}

.home-hero h1 {
  max-width: 880px;
  margin-bottom: 30px;
  font-size: clamp(4.2rem, 9.6vw, 9rem);
  font-weight: 720;
  letter-spacing: -0.072em;
  line-height: 0.86;
}

.home-hero h1 em {
  display: block;
  color: var(--mint-bright);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
}

.home-hero-lede {
  max-width: 590px;
  margin-bottom: 30px;
  color: #c8d5cf;
  font-size: clamp(1.08rem, 1.7vw, 1.35rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.home-button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 850;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

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

.home-button--sun {
  background: var(--sun);
  color: var(--ink);
}

.home-button--sun:hover {
  background: #ffd981;
}

.home-button--primary { background: var(--green-dark); color: #fff; }
.home-button--primary:hover { background: var(--green); }

.home-button--outline {
  border-color: rgba(247, 245, 239, 0.34);
  color: var(--paper);
}

.home-button--outline:hover {
  border-color: var(--mint-bright);
}

.hero-stage {
  position: relative;
  display: grid;
  min-height: min(620px, 67vh);
  place-items: center;
  border: 1px solid rgba(247, 245, 239, 0.12);
  border-radius: clamp(34px, 5vw, 74px);
  background:
    linear-gradient(rgba(247, 245, 239, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 245, 239, 0.035) 1px, transparent 1px),
    #132c24;
  background-size: 34px 34px;
  box-shadow: 0 35px 90px rgba(0, 0, 0, 0.3);
}

.hero-orbit {
  position: absolute;
  border: 1px solid rgba(111, 208, 169, 0.24);
  border-radius: 50%;
}

.hero-orbit--one {
  width: 74%;
  aspect-ratio: 1;
}

.hero-orbit--two {
  width: 47%;
  aspect-ratio: 1;
  border-color: rgba(245, 201, 107, 0.22);
}

.hero-array {
  position: absolute;
  right: 7%;
  bottom: 8%;
  display: flex;
  gap: 6px;
}

.hero-array span {
  display: grid;
  width: 38px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(247, 245, 239, 0.2);
  border-radius: 10px;
  background: rgba(8, 23, 19, 0.7);
  color: #d9e9df;
  font-size: 0.74rem;
  font-weight: 800;
}

.hero-array .is-best {
  border-color: var(--sun);
  background: rgba(245, 201, 107, 0.16);
  color: var(--sun);
  transform: translateY(-8px);
}

.hero-note {
  position: absolute;
  top: 8%;
  left: 7%;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 8px;
  max-width: 210px;
  padding: 14px 16px;
  border: 1px solid rgba(247, 245, 239, 0.15);
  border-radius: 16px;
  background: rgba(8, 23, 19, 0.74);
  color: #b8c7c0;
  font-size: 0.66rem;
  backdrop-filter: blur(8px);
}

.hero-note-dot {
  grid-row: 1 / 3;
  width: 8px;
  height: 8px;
  margin-top: 2px;
  border-radius: 50%;
  background: var(--mint-bright);
  box-shadow: 0 0 0 5px rgba(111, 208, 169, 0.1);
}

.hero-note strong {
  color: var(--mint-bright);
  font-size: 0.58rem;
  letter-spacing: 0.11em;
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  display: grid;
  gap: 7px;
  justify-items: center;
  color: #9eb5aa;
  font-size: 0.6rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-decoration: none;
  transform: translateX(-50%);
}

.scroll-cue i {
  width: 1px;
  height: 24px;
  background: linear-gradient(var(--mint-bright), transparent);
}

.promise-section {
  padding: clamp(110px, 16vw, 220px) 32px;
  background: var(--paper);
}

.promise-inner {
  max-width: 1060px;
  margin: 0 auto;
  text-align: center;
}

.promise-inner h2,
.system-heading h2,
.lesson-section-heading h2,
.final-copy h2 {
  margin-bottom: 28px;
  font-size: clamp(3rem, 7vw, 7rem);
  font-weight: 690;
  letter-spacing: -0.065em;
  line-height: 0.94;
}

.promise-inner > p:last-child {
  max-width: 720px;
  margin: 0 auto;
  color: var(--ink-soft);
  font-size: clamp(1.02rem, 1.6vw, 1.25rem);
  line-height: 1.65;
}

.story-section {
  padding: 120px 32px 150px;
  border-top: 1px solid var(--line);
  background: #f0f3ed;
}

.story-intro,
.story-layout {
  max-width: var(--content);
  margin-right: auto;
  margin-left: auto;
}

.story-intro {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 50px;
  align-items: end;
  margin-bottom: 80px;
}

.story-intro .home-eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -28px;
}

.story-intro h2 {
  margin-bottom: 0;
  font-size: clamp(3rem, 6.5vw, 6.4rem);
  letter-spacing: -0.065em;
  line-height: 0.92;
}

.story-intro > p:last-child {
  max-width: 550px;
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 1.15rem;
  line-height: 1.65;
}

.story-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.32fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 86px);
  align-items: start;
}

.story-guide {
  position: sticky;
  top: 130px;
  min-height: 420px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: var(--surface);
  box-shadow: 0 24px 60px rgba(16, 37, 31, 0.08);
}

.story-guide-stage {
  display: grid;
  min-height: 180px;
  margin-bottom: 28px;
  place-items: center;
  border-radius: 23px;
  background:
    radial-gradient(circle at center, rgba(111, 208, 169, 0.2), transparent 55%),
    var(--ink);
}

.story-guide-label {
  margin-bottom: 10px;
  color: var(--green);
  font-size: 0.64rem;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.story-guide-message {
  min-height: 78px;
  margin-bottom: 26px;
  font-size: 1.05rem;
  font-weight: 720;
  line-height: 1.46;
}

.story-progress {
  display: block;
  height: 4px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--line);
}

.story-progress i {
  display: block;
  width: 33%;
  height: 100%;
  border-radius: inherit;
  background: var(--green);
  transition: width 320ms ease;
}

.story-chapters {
  display: grid;
  gap: 42px;
  min-width: 0;
}

.story-chapter {
  min-height: min(800px, 82vh);
  min-width: 0;
  padding: clamp(28px, 5vw, 64px);
  border: 1px solid var(--line);
  border-radius: 44px;
  opacity: 1;
  transition: border-color 220ms ease, box-shadow 220ms ease;
}

.motion-ready .story-chapter {
  box-shadow: none;
}

.motion-ready .story-chapter.is-active {
  border-color: #9eb9aa;
  box-shadow: 0 28px 80px rgba(16, 37, 31, 0.1);
}

.story-chapter--mint {
  background: var(--mint);
}

.story-chapter--ink {
  border-color: #314840;
  background: var(--ink);
  color: var(--paper);
}

.story-chapter--paper {
  background: var(--surface);
}

.chapter-copy {
  max-width: 680px;
  margin-bottom: 54px;
}

.chapter-number {
  margin-bottom: 18px;
  color: var(--green);
  font-size: 0.66rem;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.story-chapter--ink .chapter-number {
  color: var(--mint-bright);
}

.chapter-copy h3 {
  margin-bottom: 22px;
  font-size: clamp(2.5rem, 5vw, 5.3rem);
  font-weight: 690;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.chapter-copy > p:last-child {
  max-width: 600px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1.04rem;
  line-height: 1.65;
}

.story-chapter--ink .chapter-copy > p:last-child {
  color: #b8c7c0;
}

.demo-card,
.control-stage {
  min-width: 0;
  border: 1px solid rgba(16, 37, 31, 0.14);
  border-radius: 28px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 20px 55px rgba(16, 37, 31, 0.1);
}

.demo-card {
  padding: clamp(20px, 4vw, 34px);
}

.story-chapter--ink .demo-card {
  border-color: rgba(247, 245, 239, 0.15);
  background: #162e26;
  color: var(--paper);
  box-shadow: none;
}

.demo-topline {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  margin-bottom: 38px;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.demo-topline > span:nth-child(2) {
  color: var(--ink-soft);
  font-weight: 700;
  letter-spacing: 0;
  text-align: right;
}

.story-chapter--ink .demo-topline > span:nth-child(2) {
  color: #9eb5aa;
}

.demo-topline button {
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--green-dark);
  font: inherit;
  font-weight: 850;
  letter-spacing: 0;
  cursor: pointer;
}

.story-chapter--ink .demo-topline button {
  border-color: #40584f;
  color: var(--sun);
}

.demo-topline button:hover {
  border-color: var(--green);
}

.demo-array {
  display: grid;
  grid-template-columns: repeat(4, minmax(78px, 1fr));
  gap: 9px;
  overflow-x: auto;
  padding: 28px 3px 10px;
}

.demo-array--window {
  grid-template-columns: repeat(6, minmax(72px, 1fr));
}

.demo-array > span {
  position: relative;
  display: grid;
  min-height: 104px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: #f8faf7;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease, opacity 220ms ease;
}

.story-chapter--ink .demo-array > span {
  border-color: #40584f;
  background: #203a31;
}

.demo-array small {
  position: absolute;
  top: 9px;
  left: 11px;
  color: #50615a;
  font-size: 0.65rem;
  font-weight: 700;
}

.story-chapter--ink .demo-array small {
  color: #c8d5cf;
}

.demo-array strong {
  font-size: clamp(1.2rem, 2.7vw, 2rem);
}

.demo-array i {
  position: absolute;
  top: -24px;
  left: 50%;
  color: var(--green-dark);
  font-size: 0.56rem;
  font-style: normal;
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transform: translateX(-50%);
  white-space: nowrap;
}

.story-chapter--ink .demo-array i {
  color: var(--sun);
}

.scan-demo .demo-array > span.is-current {
  border-color: var(--sun);
  background: #fff3cf;
  transform: translateY(-9px);
}

.scan-demo .demo-array > span.is-best {
  box-shadow: inset 0 -6px 0 var(--green);
}

.window-demo .demo-array > span.is-window {
  border-color: var(--blue);
  background: #293c50;
}

.window-demo .demo-array > span.is-leaving {
  border-color: var(--coral);
  opacity: 0.55;
}

.window-demo .demo-array > span.is-entering {
  border-color: var(--sun);
  transform: translateY(-9px);
}

.demo-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
  margin-top: 26px;
}

.demo-stats > span {
  min-width: 0;
  padding: 15px;
  border-radius: 15px;
  background: var(--blue-soft);
}

.story-chapter--ink .demo-stats > span {
  background: #203a31;
}

.demo-stats small,
.demo-stats strong {
  display: block;
}

.demo-stats small {
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 0.63rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.story-chapter--ink .demo-stats small {
  color: #9eb5aa;
}

.demo-stats strong {
  margin-top: 8px;
  overflow-wrap: anywhere;
  font-size: 1.1rem;
}

.control-stage {
  overflow: hidden;
}

.control-preview {
  padding: clamp(22px, 4vw, 36px);
  background: var(--ink);
  color: #d9e9df;
}

.control-step {
  display: block;
  margin-bottom: 22px;
  color: var(--mint-bright);
  font-size: 0.62rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.control-code {
  display: grid;
  gap: 4px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(0.78rem, 1.7vw, 0.98rem);
  line-height: 1.8;
  white-space: nowrap;
}

.control-code span {
  padding: 2px 10px;
  border-radius: 7px;
}

.control-code i {
  display: inline-block;
  width: 24px;
  color: #71867c;
  font-style: normal;
}

.control-code .is-active {
  background: rgba(245, 201, 107, 0.18);
  color: var(--paper);
}

.control-code .is-active i {
  color: var(--sun);
}

.control-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 18px;
}

.control-bar > span {
  min-height: 42px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 780;
}

.control-bar .control-bar-primary {
  border-color: var(--green-dark);
  background: var(--green-dark);
  color: white;
}

.control-bar .control-speed {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-left: auto;
}

.control-speed i {
  display: block;
  width: 76px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--green) 60%, var(--line) 60%);
}

.text-arrow-link {
  display: inline-flex;
  gap: 10px;
  margin: 0 22px 24px;
  color: var(--green-dark);
  font-size: 0.82rem;
  font-weight: 850;
  text-underline-offset: 5px;
}

.system-section {
  padding: clamp(110px, 14vw, 190px) 32px;
  background: var(--blue-soft);
}

.system-heading,
.system-flow,
.system-outputs {
  max-width: var(--content);
  margin-right: auto;
  margin-left: auto;
}

.system-heading {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 50px;
  align-items: end;
  margin-bottom: 76px;
}

.system-heading .home-eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -30px;
}

.system-heading h2 {
  margin-bottom: 0;
}

.system-heading > p:last-child {
  max-width: 500px;
  margin-bottom: 8px;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.65;
}

.system-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr) auto);
  align-items: center;
}

.system-flow > div {
  display: grid;
  min-height: 180px;
  align-content: space-between;
  padding: 22px;
  border: 1px solid #c6cbed;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.58);
}

.system-flow > div.system-flow-focus {
  border-color: var(--green);
  background: var(--mint);
  transform: translateY(-10px);
}

.system-flow > i {
  padding: 0 8px;
  color: var(--green);
  font-style: normal;
}

.system-flow span {
  color: var(--green);
  font-size: 0.64rem;
  font-weight: 850;
  letter-spacing: 0.1em;
}

.system-flow strong {
  align-self: end;
  font-size: 1.05rem;
}

.system-flow small {
  color: var(--ink-soft);
  line-height: 1.4;
}

.system-outputs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 42px;
}

.system-outputs span {
  padding: 10px 14px;
  border: 1px solid #c6cbed;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.5);
  font-size: 0.7rem;
  font-weight: 750;
}

.lesson-section {
  padding: clamp(110px, 14vw, 180px) 32px;
  background: var(--mint);
}

.lesson-section-heading,
.home-topic-nav,
.home-lessons,
.lesson-footnote {
  max-width: var(--content);
  margin-right: auto;
  margin-left: auto;
}

.lesson-section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 50px;
  align-items: end;
  margin-bottom: 48px;
}

.lesson-section-heading h2 {
  max-width: 780px;
  margin-bottom: 0;
}

.lesson-section-heading > p {
  margin-bottom: 9px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.home-topic-nav {
  margin-bottom: 58px;
  scroll-margin-top: 110px;
}

.home-progress {
  display: grid;
  grid-template-columns: minmax(230px, 0.8fr) minmax(260px, 1.2fr) auto;
  gap: 24px;
  align-items: center;
  max-width: var(--content);
  margin: 0 auto 34px;
  padding: 24px;
  border: 1px solid #a9c2b3;
  border-radius: 26px;
  background: var(--mint);
}

.home-progress[hidden] { display: none; }
.home-progress .home-eyebrow { margin-bottom: 5px; }
.home-progress h3 { margin: 0; font-size: 1.2rem; }
.home-progress p:last-child { margin: 7px 0 0; color: var(--ink-soft); font-size: 0.78rem; }
.home-progress-meter { height: 12px; overflow: hidden; border-radius: 999px; background: rgba(16,37,31,0.12); }
.home-progress-meter span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--green-dark), var(--green)); }
.home-progress .home-button { white-space: nowrap; }
.home-catalog-tools { display: grid; grid-template-columns: minmax(220px, 1.5fr) repeat(3, minmax(140px, 0.75fr)) auto; gap: 12px; align-items: end; max-width: var(--content); margin: 0 auto 14px; padding: 20px; border: 1px solid var(--line); border-radius: 22px; background: var(--surface); }
.home-catalog-tools label { display: grid; gap: 7px; min-width: 0; color: var(--ink-soft); font-size: 0.7rem; font-weight: 800; }
.home-catalog-tools input, .home-catalog-tools select { width: 100%; min-width: 0; height: 44px; border: 1px solid var(--line); border-radius: 12px; padding: 0 12px; background: #fbfcfa; color: var(--ink); font: inherit; }
.home-filter-clear { min-height: 44px; padding: 0 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--ink); font: inherit; font-weight: 800; cursor: pointer; }
.home-filter-clear[hidden] { display: none; }
.home-filter-results { max-width: var(--content); min-height: 32px; margin: 0 auto 18px; color: var(--ink-soft); font-size: 0.75rem; font-weight: 700; }
.home-filter-results p { margin: 0; }
.home-filter-empty { max-width: var(--content); margin: 18px auto 34px; padding: 36px; border: 1px dashed #a9c2b3; border-radius: 24px; background: rgba(217,239,228,0.3); text-align: center; }
.home-filter-empty[hidden] { display: none; }
.home-filter-empty p { margin: 8px 0 18px; color: var(--ink-soft); }

.home-topic-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.home-topic-nav a {
  display: inline-flex;
  gap: 9px;
  align-items: center;
  padding: 10px 13px;
  border: 1px solid #a9c2b3;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  color: var(--green-dark);
  font-size: 0.7rem;
  font-weight: 800;
  text-decoration: none;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.home-topic-nav a:hover {
  border-color: var(--green);
  background: var(--surface);
  transform: translateY(-2px);
}

.home-topic-nav a:focus-visible,
.home-lesson-topic-actions a:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 3px;
}

.home-topic-nav small {
  display: grid;
  min-width: 22px;
  min-height: 22px;
  place-items: center;
  border-radius: 999px;
  background: var(--green);
  color: white;
  font-size: 0.6rem;
}

.home-lesson-progress { justify-self: start; margin-top: 5px; padding: 4px 8px; border-radius: 999px; background: #eef2ef; color: var(--ink-soft); font-size: 0.62rem; font-weight: 850; letter-spacing: 0.04em; line-height: 1; text-transform: uppercase; }
.home-lesson-card[data-progress="complete"] .home-lesson-progress { background: #c9ead9; color: var(--green-dark); }
.home-lesson-card[data-progress="in-progress"] .home-lesson-progress { background: var(--blue-soft); color: #3f4b9e; }

.home-lessons {
  display: grid;
  gap: clamp(72px, 10vw, 120px);
}
.home-lesson-topic[hidden], .home-topic-lessons > li[hidden], .home-topic-nav li[hidden] { display: none; }

.home-lesson-topic {
  scroll-margin-top: 110px;
}

.home-lesson-topic:focus {
  outline: none;
}

.home-lesson-topic:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 14px;
  border-radius: 18px;
}

.home-lesson-topic-heading {
  display: flex;
  gap: 28px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid #a9c2b3;
}

.home-lesson-topic-heading h3 {
  margin: 6px 0 0;
  font-size: clamp(2rem, 5vw, 4.5rem);
  letter-spacing: -0.045em;
}

.home-lesson-topic-actions {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-shrink: 0;
  padding-bottom: 8px;
  font-size: 0.69rem;
  font-weight: 800;
}

.home-lesson-topic-actions span {
  color: var(--ink-soft);
}

.home-lesson-topic-actions a {
  color: var(--green-dark);
  text-underline-offset: 4px;
}

.home-topic-lessons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.home-topic-lessons > li {
  min-width: 0;
}

.home-lesson-group {
  margin: 0;
  color: var(--green-dark);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.home-lesson-group:first-child {
  margin-top: 0;
}

.home-lesson-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
  min-height: 250px;
  height: 100%;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid #b3c9bb;
  border-radius: 30px;
  background: var(--surface);
  color: var(--ink);
  text-decoration: none;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.home-lesson-card:hover {
  border-color: var(--green);
  box-shadow: 0 24px 60px rgba(16, 37, 31, 0.1);
  transform: translateY(-5px);
}

.lesson-index {
  color: var(--green);
  font-size: 0.7rem;
  font-weight: 850;
}

.lesson-card-copy {
  display: grid;
  align-self: end;
  gap: 8px;
}

.lesson-card-copy small {
  color: var(--green);
  font-size: 0.63rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.lesson-card-copy strong {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  letter-spacing: -0.04em;
}

.lesson-card-copy > span {
  max-width: 440px;
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.55;
}

.lesson-card-arrow {
  color: var(--green);
  font-size: 1.4rem;
}

.lesson-footnote {
  margin-top: 28px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-align: center;
}

.final-section {
  display: grid;
  grid-template-columns: minmax(320px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(30px, 7vw, 100px);
  align-items: center;
  min-height: 88svh;
  padding: clamp(110px, 14vw, 180px) max(32px, calc((100vw - var(--content)) / 2));
  overflow: hidden;
  background:
    radial-gradient(circle at 25% 50%, rgba(111, 208, 169, 0.14), transparent 30%),
    var(--ink-deep);
  color: var(--paper);
}

.final-pip {
  display: grid;
  min-height: 520px;
  place-items: center;
  border: 1px solid rgba(247, 245, 239, 0.12);
  border-radius: 60px;
  background:
    linear-gradient(rgba(247, 245, 239, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 245, 239, 0.035) 1px, transparent 1px),
    #132c24;
  background-size: 34px 34px;
}

.final-copy h2 {
  max-width: 820px;
}

.final-copy > p:not(.home-eyebrow) {
  max-width: 570px;
  margin-bottom: 30px;
  color: #b8c7c0;
  font-size: 1.08rem;
  line-height: 1.65;
}

.home-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 32px max(32px, calc((100vw - var(--content)) / 2));
  border-top: 1px solid #263d35;
  background: var(--ink-deep);
  color: var(--paper);
}

.home-footer p {
  margin-bottom: 0;
  color: #8da198;
  font-size: 0.72rem;
  text-align: center;
}

.home-footer p a {
  color: var(--mint-bright);
  font-weight: 800;
  text-underline-offset: 5px;
}

.home-footer > a:last-child {
  color: var(--mint-bright);
  font-size: 0.72rem;
  font-weight: 800;
  text-underline-offset: 5px;
}

.motion-ready [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 650ms ease, transform 650ms cubic-bezier(0.2, 0.75, 0.25, 1);
}

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

.motion-ready .home-topic-lessons > [data-reveal]:nth-child(2) {
  transition-delay: 90ms;
}

.motion-ready .home-topic-lessons > [data-reveal]:nth-child(3) {
  transition-delay: 180ms;
}

.motion-ready .home-topic-lessons > [data-reveal]:nth-child(4) {
  transition-delay: 270ms;
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .home-hero-copy {
    max-width: 850px;
  }

  .hero-stage {
    min-height: 520px;
  }

  .story-intro,
  .system-heading,
  .lesson-section-heading {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .story-intro .home-eyebrow,
  .system-heading .home-eyebrow {
    margin-bottom: 0;
  }

  .story-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
  }

  .story-guide {
    padding: 18px;
  }

  .story-guide-stage {
    min-height: 150px;
  }

  .system-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .system-flow > i {
    display: none;
  }

  .system-flow > div.system-flow-focus {
    transform: none;
  }

  .final-section {
    grid-template-columns: 0.75fr 1.25fr;
  }
}

@media (max-width: 720px) {
  .home-header {
    padding: 16px 18px;
  }

  .home-header.is-scrolled {
    top: 8px;
    max-width: calc(100% - 16px);
  }

  .home-brand small {
    display: none;
  }

  .home-brand-mark {
    width: 38px;
    height: 38px;
  }

  .header-cta {
    min-height: 40px;
    padding: 8px 12px;
  }

  .home-hero {
    min-height: auto;
    padding: 125px 20px 85px;
  }

  .home-hero h1 {
    font-size: clamp(4rem, 20vw, 6.5rem);
  }

  .hero-stage {
    min-height: 410px;
    border-radius: 36px;
  }

  .hero-note {
    top: 5%;
    left: 5%;
  }

  .hero-array {
    right: 5%;
    bottom: 5%;
  }

  .scroll-cue {
    display: none;
  }

  .promise-section,
  .story-section,
  .system-section,
  .lesson-section {
    padding-right: 20px;
    padding-left: 20px;
  }

  .story-layout {
    display: block;
  }

  .story-guide {
    position: relative;
    top: auto;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 12px 18px;
    align-items: center;
    min-height: 0;
    margin-bottom: 24px;
    padding: 18px;
    border-radius: 24px;
  }

  .story-guide-stage {
    grid-row: 1 / 4;
    width: 110px;
    min-height: 110px;
    margin-bottom: 0;
  }

  .story-guide-label,
  .story-guide-message {
    margin-bottom: 0;
  }

  .story-guide-message {
    min-height: 0;
    font-size: 0.9rem;
  }

  .story-progress {
    grid-column: 2;
  }

  .story-chapter {
    min-height: 0;
    max-width: 100%;
    overflow: hidden;
    padding: 28px 20px;
    border-radius: 28px;
    opacity: 1;
  }

  .chapter-copy {
    margin-bottom: 36px;
  }

  .demo-card {
    border-radius: 21px;
  }

  .demo-topline {
    grid-template-columns: 1fr auto;
    gap: 10px;
  }

  .demo-topline > span:nth-child(2) {
    grid-row: 2;
    grid-column: 1 / -1;
    text-align: left;
  }

  .demo-array {
    width: 100%;
    min-width: 0;
    grid-template-columns: repeat(4, minmax(68px, 1fr));
  }

  .demo-array--window {
    grid-template-columns: repeat(6, minmax(66px, 1fr));
  }

  .demo-array > span {
    min-height: 86px;
  }

  .demo-stats {
    grid-template-columns: 1fr;
  }

  .control-bar .control-speed {
    width: 100%;
    margin-left: 0;
  }

  .control-speed i {
    flex: 1;
  }

  .home-topic-lessons,
  .final-section {
    grid-template-columns: 1fr;
  }

  .home-lesson-card {
    min-height: 220px;
  }

  .home-lesson-topic-heading {
    align-items: start;
  }

  .final-section {
    padding-right: 20px;
    padding-left: 20px;
  }

  .final-pip {
    min-height: 400px;
    border-radius: 38px;
  }

  .home-footer {
    grid-template-columns: 1fr;
    justify-items: start;
    padding-right: 20px;
    padding-left: 20px;
  }

  .home-footer p {
    text-align: left;
  }
}

@media (max-width: 460px) {
  .home-brand strong {
    font-size: 0.72rem;
  }

  .header-cta {
    font-size: 0.69rem;
  }

  .home-hero h1 {
    font-size: clamp(3.6rem, 19vw, 5.2rem);
  }

  .home-button {
    width: 100%;
  }

  .hero-stage {
    min-height: 340px;
  }

  .hero-array span {
    width: 32px;
  }

  .hero-note {
    max-width: 180px;
  }

  .story-guide {
    grid-template-columns: 76px 1fr;
  }

  .story-guide-stage {
    width: 76px;
    min-height: 76px;
  }

  .story-guide-stage .pip-avatar {
    --pip-size: 3.5rem;
  }

  .system-flow {
    grid-template-columns: 1fr;
  }

  .system-flow > div {
    min-height: 150px;
  }

  .home-lesson-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .home-topic-nav a {
    padding: 9px 11px;
  }

  .home-progress { grid-template-columns: 1fr; }
  .home-progress .home-button { justify-self: start; }
  .home-catalog-tools { grid-template-columns: 1fr 1fr; }
  .home-catalog-search { grid-column: 1 / -1; }
  .home-filter-clear { grid-column: 1 / -1; justify-self: start; }

  .home-lesson-topic-heading {
    display: grid;
  }

  .home-lesson-topic-actions {
    justify-content: space-between;
    width: 100%;
  }

  .lesson-card-arrow {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .story-chapter {
    opacity: 1;
  }
}