/* Local system fonts keep the site fast and avoid third-party font requests. */
:root {
  --paper: #faf9f5;
  --ink: #142b24;
  --muted: #5c6862;
  --green: #143c2e;
  --mint: #c7edb7;
  --gold: #f3ce77;
  --line: #dddeda;
  --radius: 18px;
  --font:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-underline-offset: 4px;
}
button,
input {
  font: inherit;
}
button,
a,
input {
  touch-action: manipulation;
}
button {
  cursor: pointer;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid #3f8971;
  outline-offset: 5px;
}
button:disabled {
  cursor: wait;
  opacity: 0.6;
}
::selection {
  background: var(--mint);
}
.shell {
  width: min(1240px, calc(100% - 96px));
  margin-inline: auto;
}
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.nav-row {
  min-height: 98px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 24px;
  font-weight: 750;
  letter-spacing: -1.1px;
  white-space: nowrap;
}
.brand-icon {
  border-radius: 11px;
}
.brand-dot {
  color: #7b9b5f;
}
.nav-row nav {
  display: flex;
  gap: 30px;
  font-size: 14px;
}
.nav-row nav a {
  text-decoration: none;
}
.nav-row nav a:hover,
.quiet-link:hover,
.footer-bottom a:hover {
  color: #47745c;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 25px;
  padding: 15px 23px;
  border-radius: 8px;
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
  line-height: 1.4;
  min-height: 52px;
  transition:
    background 0.2s,
    transform 0.2s;
}
.button:hover {
  transform: translateY(-2px);
}
.button-dark {
  background: var(--green);
  color: #fff;
}
.button-dark:hover {
  background: #215440;
}
.button-small {
  padding: 12px 18px;
  min-height: 44px;
  font-size: 13px;
}
.button-outline {
  border-color: var(--green);
  color: var(--green);
  background: transparent;
}
.button-outline:hover {
  background: #ecf2e8;
}
.button-mint {
  background: var(--mint);
  color: var(--ink);
}
.button-mint:hover {
  background: #daf5ce;
}
.quiet-link {
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  gap: 16px;
  align-items: center;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 1.8px;
  font-weight: 750;
  margin: 0 0 24px;
  display: flex;
  align-items: center;
  gap: 9px;
}
.status-dot {
  height: 7px;
  width: 7px;
  border-radius: 50%;
  background: #6c9c67;
}
.hero {
  display: grid;
  grid-template-columns: 1.02fr 1fr;
  gap: 50px;
  align-items: center;
  padding-block: 80px 92px;
}
.hero-copy {
  position: relative;
}
.hero h1 {
  font-size: clamp(56px, 5.5vw, 79px);
  line-height: 1.04;
  font-weight: 600;
  letter-spacing: -4px;
  margin: 0 0 25px;
  position: relative;
  max-width: 580px;
}
.italic-word {
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-weight: 400;
  color: #497952;
}
.hero-spark {
  margin-left: 18px;
  color: #6f975d;
  vertical-align: baseline;
}
.hero-description {
  font-size: 18px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0 0 29px;
  letter-spacing: -0.2px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.hero-actions .quiet-link {
  font-size: 12px;
}
.hero-proof {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  color: var(--muted);
  margin: 24px 0 0;
  flex-wrap: wrap;
}
.hero-proof > span:not(.check) {
  margin: 0 2px;
  color: #a9afa7;
}
.check {
  color: #527f48;
  margin-right: 6px;
  font-weight: 700;
}
.demo-scene {
  position: relative;
  padding: 50px 10px 55px;
  background: radial-gradient(ellipse at center, #e9efdf 0%, transparent 70%);
  scroll-margin-top: 100px;
}
.demo-card {
  border: 1px solid #e1e4da;
  border-radius: 24px;
  background: #fffefb;
  padding: 28px 30px 20px;
  box-shadow: 0 20px 55px #1838250c;
  position: relative;
  z-index: 1;
  transform: rotate(-2deg);
}
.demo-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.lesson-label {
  font-size: 9px;
  letter-spacing: 1.4px;
  font-weight: 750;
  color: #6c7b65;
}
.lesson-pill {
  font-size: 10px;
  background: #edf4e6;
  padding: 5px 10px;
  border-radius: 20px;
  color: #4c6d40;
  white-space: nowrap;
}
.demo-question {
  text-align: center;
  margin: 29px 0 3px;
  font-size: 24px;
  letter-spacing: -0.8px;
}
.demo-question strong {
  font-weight: 650;
}
.demo-caption {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
  margin: 0;
  min-height: 24px;
}
.number-stage {
  height: 180px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 70px;
  font-weight: 600;
  letter-spacing: -4px;
  font-variant-numeric: tabular-nums;
}
.digit {
  position: relative;
  transition:
    transform 0.45s,
    opacity 0.45s,
    color 0.25s;
  min-width: 58px;
  text-align: center;
}
.digit-middle {
  border: 1.5px dashed #bccdb6;
  border-radius: 12px;
  background: #f3f7ef;
  color: #a4b39c;
  font-size: 38px;
  height: 79px;
  line-height: 75px;
  letter-spacing: 0;
  min-width: 64px;
}
.bridge-equation {
  position: absolute;
  top: 6px;
  left: 0;
  right: 0;
  font-size: 16px;
  letter-spacing: 1px;
  text-align: center;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.35s,
    transform 0.35s;
  color: #617859;
}
.bridge-equation b {
  color: #294a32;
}
.number-stage[data-stage="1"] .bridge-equation {
  opacity: 1;
  transform: translateY(0);
}
.number-stage[data-stage="1"] .digit-middle {
  color: #284b31;
  background: #e4f0d9;
  border-color: #739562;
}
.number-stage[data-stage="2"] .digit-middle {
  background: transparent;
  border-color: transparent;
  color: #376a40;
  font-size: 70px;
  letter-spacing: -4px;
}
.number-stage[data-stage="2"] {
  gap: 0;
}
.number-stage[data-stage="2"] .digit-left {
  transform: translateX(3px);
}
.number-stage[data-stage="2"] .digit-right {
  transform: translateX(-3px);
}
.demo-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 2px 0 22px;
}
.step-dot {
  display: flex;
  gap: 7px;
  align-items: center;
  border: 0;
  background: transparent;
  padding: 7px 0;
  color: #8b9687;
  font-size: 11px;
  min-height: 36px;
}
.step-dot.active {
  color: #315f36;
  font-weight: 700;
}
.step-line {
  width: 24px;
  height: 1px;
  background: #dce2d5;
}
.demo-next {
  width: 100%;
  font-size: 12px;
}
.demo-hint {
  text-align: center;
  font-size: 10px;
  color: #7b8578;
  margin: 12px 0 0;
  min-height: 18px;
}
.floating-tag {
  position: absolute;
  background: #fffefb;
  border: 1px solid #dde3d7;
  z-index: 2;
  box-shadow: 0 8px 22px #18382506;
}
.tag-top {
  right: -2px;
  top: 10px;
  transform: rotate(4deg);
  padding: 12px 17px;
  border-radius: 9px;
  font-size: 11px;
  font-weight: 600;
}
.tag-top > span {
  font-size: 20px;
  color: #6b9056;
  margin-right: 8px;
}
.tag-bottom {
  bottom: 27px;
  left: -20px;
  transform: rotate(2deg);
  padding: 14px 22px 14px 15px;
  border-radius: 12px;
  display: flex;
  gap: 11px;
  align-items: center;
}
.mini-check {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: #e7f0dc;
  border-radius: 50%;
  color: #4c7c3b;
  font-size: 14px;
}
.tag-bottom strong,
.tag-bottom div > span {
  display: block;
  font-size: 11px;
}
.tag-bottom div > span {
  font-size: 10px;
  color: var(--muted);
}
.scene-star {
  position: absolute;
  right: -25px;
  bottom: 18px;
  font-size: 64px;
  color: #edc66e;
  line-height: 1;
  z-index: 2;
}
.principles-strip {
  background: #ecf0e6;
  border-block: 1px solid #dce1d4;
}
.principles-strip > .shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 91px;
}
.principles-strip .shell > span:first-child {
  font-size: 9px;
  letter-spacing: 1.6px;
  color: #6d7a63;
  font-weight: 650;
}
.principles-strip strong {
  font-size: 17px;
  font-weight: 550;
  letter-spacing: -0.5px;
}
.strip-arrow {
  color: #7e9870;
}
.strip-mark {
  font-size: 28px;
  color: #698957;
}
.section {
  padding-block: 92px;
}
.section-top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 46px;
}
.section-top p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 4px;
}
h2 {
  font-size: clamp(34px, 3.4vw, 46px);
  line-height: 1.13;
  letter-spacing: -1.9px;
  font-weight: 550;
  margin: 0;
}
.section-top .eyebrow {
  margin-bottom: 17px;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 42px;
}
.feature-number {
  font-size: 10px;
  letter-spacing: 1.3px;
  color: #7b8577;
  font-weight: 650;
}
.feature-art {
  height: 145px;
  margin: 20px 0 25px;
  background: #eef1e8;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.feature h3 {
  font-size: 21px;
  font-weight: 550;
  letter-spacing: -0.6px;
  margin: 0 0 10px;
}
.feature p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  margin: 0;
}
.art-split {
  font-size: 49px;
  font-weight: 550;
}
.mini-bridge {
  border: 1px dashed #91ad80;
  border-radius: 8px;
  background: #e0ebd6;
  padding: 8px 13px;
  font-size: 21px;
  color: #4f7140;
}
.art-answer {
  flex-direction: column;
  gap: 4px;
}
.art-answer > span {
  font-size: 15px;
  color: #69795f;
}
.art-answer b {
  font-size: 37px;
  font-weight: 550;
  line-height: 1.4;
}
.art-answer i {
  font-size: 16px;
  display: inline-grid;
  place-items: center;
  width: 25px;
  height: 25px;
  background: #ccdfbc;
  color: #55763e;
  border-radius: 50%;
  font-style: normal;
}
.art-bars {
  gap: 8px;
  position: relative;
  align-items: flex-end;
  padding: 25px 50px;
}
.art-bars > span {
  width: 30px;
  background: #b7cba6;
  border-radius: 5px 5px 0 0;
  height: 25%;
}
.art-bars > span:nth-child(2) {
  height: 45%;
  background: #98b585;
}
.art-bars > span:nth-child(3) {
  height: 65%;
  background: #7f9e6d;
}
.art-bars > span:nth-child(4) {
  height: 90%;
  background: #557e4a;
}
.art-bars b {
  font-size: 15px;
  font-weight: 500;
  position: absolute;
  right: 21px;
  top: 18px;
  color: #496e42;
}
.learning-section {
  background: #f0f1e9;
  border-block: 1px solid #e3e5da;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.guide-card {
  display: block;
  text-decoration: none;
  background: var(--paper);
  border: 1px solid #dcdfd3;
  border-radius: 12px;
  padding: 26px;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px #19372109;
}
.guide-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: #677460;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.guide-math {
  font-family: Georgia, serif;
  font-size: 42px;
  letter-spacing: -1px;
  margin: 32px 0;
  color: #486740;
}
.guide-card h3 {
  font-size: 20px;
  line-height: 1.3;
  font-weight: 550;
  letter-spacing: -0.5px;
  margin: 0 0 13px;
}
.guide-card p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 23px;
}
.text-link {
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.routine-link {
  display: block;
  margin-top: 26px;
  font-size: 13px;
  color: #536d47;
}
.pricing-section {
  display: grid;
  grid-template-columns: 0.85fr 1.5fr;
  gap: 55px;
  align-items: start;
}
.pricing-intro h2 {
  margin-bottom: 24px;
}
.pricing-intro > p:not(.eyebrow):not(.small-note) {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}
.plain-list {
  list-style: none;
  padding: 0;
  margin: 25px 0;
}
.plain-list li {
  font-size: 13px;
  margin: 11px 0;
}
.small-note {
  font-size: 11px;
  line-height: 1.7;
  color: #717a6b;
}
.price-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 17px;
  padding-top: 17px;
}
.price-card {
  border: 1px solid #d9dfd1;
  border-radius: 14px;
  padding: 28px 24px 18px;
  position: relative;
  display: flex;
  flex-direction: column;
}
.plan-label {
  font-size: 10px;
  letter-spacing: 1px;
  font-weight: 750;
  margin: 0 0 25px;
}
.price-card h3 {
  margin: 0;
  line-height: 1.2;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
}
.price-card h3 > span {
  font-size: 42px;
  letter-spacing: -2.5px;
  font-weight: 550;
}
.price-card h3 small {
  font-size: 11px;
  font-weight: 400;
  color: #68775e;
  letter-spacing: 0;
}
.price-summary {
  font-size: 12px;
  color: #5c6e50;
  margin: 13px 0 0;
  min-height: 40px;
}
.price-card .plain-list {
  margin: 18px 0 24px;
  flex: 1;
}
.price-card .plain-list li {
  font-size: 11px;
}
.price-card .button {
  font-size: 11px;
  padding-inline: 10px;
  gap: 10px;
}
.price-terms {
  font-size: 9px;
  color: #6e7c64;
  text-align: center;
  line-height: 1.7;
  margin: 13px 0 0;
}
.lifetime {
  background: #e9f0df;
  border-color: #93b379;
}
.choice-label {
  position: absolute;
  top: -16px;
  left: 16px;
  right: 16px;
  text-align: center;
  background: #567e42;
  color: white;
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 1px;
  padding: 7px 6px;
  border-radius: 5px;
}
.faq-section {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  border-top: 1px solid var(--line);
}
details {
  border-bottom: 1px solid var(--line);
}
summary {
  list-style: none;
  cursor: pointer;
  padding: 21px 0;
  font-size: 14px;
  font-weight: 550;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
summary::-webkit-details-marker {
  display: none;
}
summary > span {
  font-size: 20px;
  font-weight: 400;
  color: #738868;
  line-height: 1;
}
details[open] summary > span {
  transform: rotate(45deg);
}
details p {
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 23px;
  line-height: 1.9;
}
.join-section {
  background: #173b2e;
  color: #f5f6ee;
}
.join-inner {
  padding-block: 70px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.join-inner .eyebrow {
  color: #b7cf9f;
  font-size: 10px;
}
.join-inner h2 {
  font-size: 40px;
  letter-spacing: -1.6px;
}
.gold-dot {
  color: var(--gold);
}
.join-inner p:not(.eyebrow) {
  font-size: 13px;
  color: #c4d3c6;
}
.join-inner .join-note {
  font-size: 11px;
  color: #a7bba9;
  line-height: 1.9;
}
.join-panel label {
  font-size: 12px;
}
.input-row {
  margin-top: 9px;
  display: flex;
  gap: 8px;
}
.input-row input {
  min-width: 0;
  width: 100%;
  padding: 13px 15px;
  border: 1px solid #839f85;
  border-radius: 6px;
  background: #f7faf0;
  color: var(--ink);
  font-size: 13px;
}
.input-row .button {
  white-space: nowrap;
  font-size: 12px;
  padding-inline: 15px;
  gap: 12px;
}
.consent-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.7;
  margin-top: 16px;
}
.consent-label input {
  margin-top: 5px;
  accent-color: var(--mint);
  height: 16px;
  width: 16px;
  flex-shrink: 0;
}
.consent-label span {
  font-size: 10px;
  color: #c6d6c6;
}
.form-note {
  font-size: 10px !important;
  color: #a7bba9 !important;
}
.signup-fields {
  border: 0;
  padding: 0;
  margin: 0;
  min-width: 0;
}
.signup-fields:disabled {
  opacity: 0.65;
}
.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;
}
.honey-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
#signup-status {
  font-size: 12px;
  min-height: 20px;
}
#signup-status.error {
  color: #ffdaa1;
}
.site-footer {
  padding-block: 44px 24px;
}
.footer-top,
.footer-bottom {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}
.footer-top {
  padding-bottom: 36px;
}
.footer-top .brand {
  font-size: 22px;
}
.footer-top .brand-icon {
  width: 33px;
  height: 33px;
}
.footer-top p {
  font-size: 12px;
  color: var(--muted);
  margin: 8px 0;
}
.footer-top > div:last-child {
  padding-top: 5px;
  text-align: right;
}
.footer-top strong {
  font-size: 12px;
  font-weight: 500;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  font-size: 10px;
  color: #73806f;
  align-items: center;
}
.footer-bottom nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-bottom a {
  text-decoration: none;
}
.skip-link {
  position: fixed;
  left: 10px;
  top: -70px;
  background: var(--ink);
  color: white;
  padding: 10px;
  z-index: 20;
}
.skip-link:focus {
  top: 10px;
}
.article {
  max-width: 790px;
  min-height: 60vh;
}
.article h1,
.learn-intro h1,
.action-page h1 {
  font-size: clamp(40px, 4.5vw, 60px);
  line-height: 1.1;
  letter-spacing: -2.3px;
  font-weight: 550;
  margin: 20px 0 26px;
}
.lead {
  font-size: 19px;
  color: var(--muted);
  line-height: 1.8;
}
.article h2 {
  font-size: 27px;
  letter-spacing: -0.8px;
  margin: 40px 0 18px;
}
.article h3 {
  font-size: 20px;
  font-weight: 550;
  margin: 0 0 7px;
}
.article p {
  color: var(--muted);
}
.breadcrumb {
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 38px;
}
.example-equation {
  border: 1px solid #d4dfc8;
  background: #edf2e5;
  padding: 40px 22px;
  border-radius: 14px;
  font-size: clamp(23px, 3.5vw, 40px);
  font-family: Georgia, serif;
  text-align: center;
  margin: 30px 0;
}
.lesson-list {
  padding-left: 24px;
}
.lesson-list li {
  padding: 12px 0 12px 10px;
}
.lesson-list p {
  margin: 0;
}
.practice-answer summary {
  font-size: 18px;
}
.practice-answer summary > span {
  font-size: 12px;
  align-self: center;
}
details.practice-answer[open] summary > span {
  transform: none;
}
.article-cta {
  background: #edf1e7;
  border-radius: 16px;
  padding: 10px 30px 30px;
  margin: 45px 0 30px;
}
.article-cta h2 {
  margin-top: 25px;
}
.learn-intro .guide-grid {
  margin-top: 50px;
}
.action-page {
  max-width: 800px;
  min-height: 65vh;
}
.action-page form {
  margin: 35px 0;
}
.action-page #token-status {
  font-size: 16px;
  color: #406739;
}
@media (min-width: 1500px) {
  .hero {
    padding-block: 100px;
  }
  .hero h1 {
    font-size: 84px;
  }
  .demo-scene {
    padding-inline: 20px;
  }
  .hero {
    gap: 80px;
  }
}
@media (max-width: 1100px) {
  .shell {
    width: calc(100% - 64px);
  }
  .nav-row {
    gap: 16px;
  }
  .nav-row nav {
    gap: 20px;
    font-size: 12px;
  }
  .hero {
    gap: 30px;
  }
  .hero h1 {
    font-size: 64px;
  }
  .hero-description {
    font-size: 16px;
  }
  .hero-actions {
    gap: 18px;
  }
  .hero-actions .quiet-link {
    font-size: 11px;
  }
  .demo-card {
    padding: 24px 20px 18px;
  }
  .lesson-label {
    font-size: 8px;
  }
  .tag-top {
    font-size: 10px;
    right: 0;
  }
  .scene-star {
    right: -10px;
  }
  .hero-proof {
    font-size: 10px;
  }
  .section {
    padding-block: 75px;
  }
  .feature-grid {
    gap: 25px;
  }
  .pricing-section {
    grid-template-columns: 0.75fr 1.5fr;
    gap: 25px;
  }
  .price-card {
    padding-inline: 17px;
  }
  .price-card h3 > span {
    font-size: 35px;
  }
  .price-summary {
    font-size: 11px;
  }
  .price-card .plain-list li {
    font-size: 10px;
  }
  .join-inner {
    gap: 35px;
  }
  .input-row {
    flex-wrap: wrap;
  }
  .input-row input {
    flex: 1;
    min-width: 160px;
  }
  .faq-section {
    gap: 40px;
  }
}
@media (max-width: 800px) {
  .shell {
    width: calc(100% - 40px);
  }
  .nav-row {
    min-height: 78px;
  }
  .nav-row nav {
    display: none;
  }
  .brand {
    font-size: 22px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
  }
  .button-small {
    font-size: 11px;
    padding: 10px 12px;
    gap: 10px;
    min-height: 40px;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-block: 50px 40px;
  }
  .hero-copy {
    max-width: 600px;
  }
  .hero h1 {
    font-size: 66px;
    letter-spacing: -3.6px;
  }
  .hero-description {
    font-size: 17px;
  }
  .hero-proof {
    font-size: 11px;
  }
  .demo-scene {
    width: min(460px, calc(100% - 20px));
    margin-inline: auto;
    padding-block: 45px 60px;
  }
  .demo-card {
    padding: 24px 25px 20px;
  }
  .lesson-label {
    font-size: 9px;
  }
  .number-stage {
    height: 180px;
  }
  .tag-top {
    right: -10px;
    top: 2px;
  }
  .tag-bottom {
    left: -8px;
    bottom: 28px;
  }
  .principles-strip > .shell {
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 20px;
    padding-block: 22px;
  }
  .principles-strip .shell > span:first-child {
    width: 100%;
    text-align: center;
    font-size: 9px;
  }
  .principles-strip strong {
    font-size: 15px;
  }
  .strip-mark {
    display: none;
  }
  .section {
    padding-block: 58px;
  }
  .section-top {
    align-items: flex-start;
    gap: 20px;
    flex-direction: column;
    margin-bottom: 32px;
  }
  .section-top p:last-child {
    font-size: 14px;
  }
  .section-top p br {
    display: none;
  }
  .section-top .eyebrow {
    font-size: 9px;
  }
  h2 {
    font-size: 36px;
    letter-spacing: -1.5px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .feature {
    display: grid;
    grid-template-columns: 140px 1fr;
    column-gap: 20px;
  }
  .feature-art {
    grid-column: 1;
    grid-row: 1 / 4;
    height: 145px;
    margin: 0;
    gap: 7px;
  }
  .feature-number,
  .feature h3,
  .feature p {
    grid-column: 2;
  }
  .feature-number {
    margin-bottom: 8px;
    font-size: 9px;
  }
  .feature h3 {
    font-size: 19px;
  }
  .feature p {
    font-size: 12px;
  }
  .art-split {
    font-size: 35px;
  }
  .mini-bridge {
    font-size: 15px;
    padding: 5px;
  }
  .art-answer b {
    font-size: 30px;
  }
  .art-bars {
    padding: 25px 15px;
  }
  .art-bars > span {
    width: 17px;
  }
  .art-bars b {
    font-size: 12px;
    right: 10px;
    top: 6px;
  }
  .guide-grid {
    grid-template-columns: 1fr;
  }
  .guide-card {
    padding: 24px;
  }
  .guide-math {
    margin: 24px 0;
    font-size: 40px;
  }
  .guide-card h3 {
    font-size: 22px;
  }
  .guide-card p {
    font-size: 14px;
  }
  .guide-meta {
    font-size: 10px;
  }
  .pricing-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .pricing-intro > p br {
    display: none;
  }
  .pricing-intro .small-note {
    max-width: 450px;
  }
  .price-grid {
    gap: 14px;
  }
  .price-card {
    padding: 30px 20px 20px;
  }
  .price-card h3 > span {
    font-size: 40px;
  }
  .price-card .plain-list li {
    font-size: 11px;
  }
  .price-summary {
    font-size: 12px;
  }
  .price-terms {
    font-size: 10px;
  }
  .faq-section {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .join-inner {
    grid-template-columns: 1fr;
    padding-block: 50px;
    gap: 25px;
  }
  .join-inner h2 {
    font-size: 36px;
  }
  .input-row {
    flex-wrap: nowrap;
  }
  .input-row .button {
    font-size: 11px;
  }
  .footer-top {
    flex-direction: column;
    gap: 17px;
    padding-bottom: 25px;
  }
  .footer-top > div:last-child {
    text-align: left;
  }
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }
  .footer-bottom nav {
    gap: 20px;
  }
  .article h1,
  .learn-intro h1 {
    font-size: 43px;
  }
  .lead {
    font-size: 17px;
  }
}
@media (max-width: 420px) {
  .nav-row .button-small {
    max-width: 138px;
    font-size: 10px;
  }
  .hero h1 {
    font-size: 56px;
  }
  .hero-spark {
    width: 33px;
    height: 33px;
    margin-left: 12px;
  }
  .hero-description {
    font-size: 16px;
  }
  .hero .eyebrow {
    font-size: 9px;
    letter-spacing: 1.2px;
  }
  .hero-actions {
    gap: 16px;
  }
  .hero-proof {
    font-size: 10px;
    gap: 4px;
  }
  .hero-proof .check {
    margin-right: 2px;
  }
  .demo-scene {
    width: calc(100% - 10px);
  }
  .demo-card {
    padding-inline: 18px;
  }
  .demo-header {
    gap: 4px;
  }
  .lesson-label {
    font-size: 8px;
  }
  .lesson-pill {
    font-size: 9px;
  }
  .floating-tag.tag-top {
    padding: 8px 11px;
    font-size: 9px;
  }
  .tag-bottom {
    padding: 10px 14px;
  }
  .scene-star {
    font-size: 45px;
  }
  .principles-strip > .shell {
    gap: 10px 12px;
  }
  .principles-strip strong {
    font-size: 13px;
  }
  .feature {
    grid-template-columns: 108px 1fr;
    column-gap: 15px;
  }
  .feature-art {
    height: 130px;
  }
  .art-split {
    gap: 3px;
    font-size: 28px;
  }
  .mini-bridge {
    font-size: 12px;
    padding: 3px;
  }
  .feature h3 {
    font-size: 17px;
  }
  .feature p {
    font-size: 12px;
  }
  .price-grid {
    grid-template-columns: 1fr;
    gap: 33px;
  }
  .price-card .plain-list li {
    font-size: 13px;
  }
  .price-summary {
    min-height: 0;
    font-size: 13px;
  }
  .price-card h3 > span {
    font-size: 46px;
  }
  .price-card .button {
    font-size: 13px;
  }
  .price-terms {
    font-size: 11px;
  }
  .choice-label {
    font-size: 9px;
  }
  .input-row {
    flex-wrap: wrap;
  }
  .input-row input,
  .input-row .button {
    width: 100%;
  }
  .join-inner h2 {
    font-size: 31px;
  }
  .desktop-break {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .button:hover,
  .guide-card:hover {
    transform: none;
  }
}