@charset "UTF-8";
:root {
  --ink: var(--board);
  --mint: #88e8c8;
  --pale: var(--student-soft);
  --white: var(--paper);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  margin: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input {
  font: inherit;
}
button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
button:focus-visible,
a:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #11785a;
  outline-offset: 5px;
}
button:disabled {
  cursor: default;
}
p,
h1,
h2,
h3 {
  margin-top: 0;
}
p {
  line-height: 1.75;
}
em {
  font-style: normal;
  color: var(--student);
}
.container {
  width: min(1180px, calc(100% - 64px));
  margin-inline: auto;
}
.skip {
  position: fixed;
  left: 16px;
  top: -80px;
  background: #fff;
  padding: 12px;
  z-index: 10;
}
.skip:focus {
  top: 12px;
}
.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.header-inner {
  min-height: 88px;
  display: flex;
  gap: 30px;
  align-items: center;
  justify-content: space-between;
}
.hub-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
}
.hub-symbol {
  display: grid;
  grid-template-columns: repeat(2, 9px);
  gap: 3px;
}
.hub-symbol i {
  width: 9px;
  height: 9px;
  background: var(--ink);
  border-radius: 2px;
}
.hub-symbol i:last-child {
  background: var(--mint);
}
.product-nav {
  display: flex;
  gap: 28px;
  align-items: center;
  font-size: 15px;
  font-weight: 650;
}
.product-nav a[aria-current] {
  color: #107652;
}
.new-dot {
  display: inline-block;
  font-size: 9px;
  letter-spacing: 0.05em;
  background: var(--pale);
  padding: 5px;
  border-radius: 5px;
  margin-left: 3px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  border: 0;
  border-radius: 12px;
  padding: 18px 25px;
  background: var(--ink);
  color: #fff;
  font-size: 17px;
  font-weight: 750;
  min-height: 56px;
}
.button:hover {
  background: var(--board-2);
}
.button span {
  font-size: 24px;
  font-weight: 400;
}
.button-small {
  padding: 11px 18px;
  font-size: 14px;
  min-height: 44px;
  gap: 18px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  font-weight: 700;
}
.eyebrow {
  font-size: 13px;
  letter-spacing: 0.06em;
  font-weight: 800;
  color: var(--student);
  margin: 0 0 22px;
}
.eyebrow > span {
  display: inline-block;
  width: 7px;
  height: 7px;
  background: #20b780;
  border-radius: 50%;
  margin-right: 6px;
}
.hero {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 54px;
  align-items: center;
  padding-block: 80px 86px;
}
.brand-lockup {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 25px;
}
.brand-lockup svg {
  width: 30px;
  height: 30px;
}
.brand-lockup b {
  font-size: 24px;
  letter-spacing: -1px;
}
.brand-lockup > span {
  font-size: 12px;
  color: var(--muted);
  border-left: 1px solid var(--line);
  padding-left: 12px;
  margin-left: 6px;
}
.hero .eyebrow {
  font-size: 12px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(35px, 3.9vw, 54px);
  line-height: 1.27;
  letter-spacing: -0.058em;
  margin: 0 0 25px;
  font-weight: 850;
}
.hero-description {
  font-size: 18px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 28px;
}
.hero-description strong {
  color: var(--text);
  font-weight: 650;
}
.hero-actions {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
}
.hero-facts {
  display: flex;
  gap: 18px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 12px;
  flex-wrap: wrap;
}
.hero-facts span:before {
  content: "✓";
  color: #0d805a;
  font-weight: 800;
  margin-right: 5px;
}
.beta-note {
  font-size: 12px;
  color: var(--muted);
  margin: 15px 0 0;
}
.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #16865f;
  margin-right: 5px;
}
.hero-visual {
  position: relative;
  background: var(--pale);
  padding: 32px 26px 27px;
  border-radius: 28px;
  min-width: 0;
}
.visual-caption {
  display: block;
  font-size: 13px;
  font-weight: 750;
  margin-bottom: 21px;
  text-align: center;
  color: #407a63;
}
.desktop-demo {
  border: 1px solid var(--line);
  border-radius: 15px;
  background: #fff;
  box-shadow: 0 18px 42px #103c2c0b;
  overflow: hidden;
}
.demo-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
  color: var(--muted);
}
.window-dots {
  display: flex;
  gap: 4px;
}
.window-dots i {
  width: 5px;
  height: 5px;
  background: #d3e4dc;
  border-radius: 50%;
}
.sample-tag {
  margin-left: auto;
  font-size: 9px;
  padding: 3px 6px;
  background: #f0f7f3;
  border-radius: 4px;
}
.demo-body {
  display: flex;
}
.demo-sidebar {
  width: 46px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 23px;
  border-right: 1px solid var(--line);
  padding: 18px 0;
  color: #8da799;
}
.demo-logo {
  color: #145b42;
  font-size: 19px;
}
.demo-logo span {
  font-size: 12px;
}
.sidebar-active {
  background: #dff8ed;
  color: #147b56;
  padding: 5px;
  border-radius: 6px;
}
.sidebar-bottom {
  margin-top: auto;
}
.demo-content {
  padding: 22px;
  flex: 1;
  min-width: 0;
}
.demo-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.demo-heading small {
  font-size: 10px;
  color: var(--muted);
}
.demo-heading h2 {
  font-size: 15px;
  margin: 6px 0 20px;
  letter-spacing: -0.03em;
}
.demo-day {
  font-size: 9px;
  color: #166242;
  background: #e9f9f0;
  border-radius: 5px;
  padding: 5px;
  white-space: nowrap;
}
.demo-progress {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  color: var(--muted);
  gap: 5px;
}
.demo-progress b {
  color: #267554;
}
.progress-track {
  height: 4px;
  background: #eaf3ee;
  border-radius: 5px;
  margin: 10px 0 17px;
}
.progress-track i {
  width: 33.33%;
  display: block;
  height: 100%;
  background: #2fc68f;
  border-radius: 5px;
  transition: width 0.2s;
}
.word-card {
  text-align: center;
  padding: 23px 12px;
  background: #f7fbf9;
  border: 1px solid #e6f0ea;
  border-radius: 12px;
  min-height: 214px;
}
.word-pos {
  display: block;
  font-size: 9px;
  color: #6a8d7b;
  letter-spacing: 0.18em;
}
.word-card > strong {
  display: block;
  font-size: 39px;
  letter-spacing: -0.025em;
  margin: 14px 0;
  color: #174b36;
}
.word-card p {
  font-size: 11px;
  color: var(--muted);
  min-height: 19px;
  margin-bottom: 17px;
}
.word-card #demo-meaning {
  font-size: 16px;
  color: #126e48;
  font-weight: 750;
}
.demo-reveal {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 11px;
  font-weight: 650;
  padding: 9px 15px;
  color: #1d6849;
}
.demo-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 9px;
  margin-top: 13px;
  color: var(--muted);
}
.demo-card-footer button {
  border: 0;
  background: var(--student-soft);
  color: #186046;
  font-size: 18px;
  width: 32px;
  height: 32px;
  border-radius: 9px;
}
.floating-note {
  margin: 17px 0 0;
  display: flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  padding: 13px 17px;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.note-check {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  background: var(--note);
  border-radius: 50%;
  color: #0b6946;
}
.floating-note b {
  font-size: 12px;
}
.floating-note p {
  font-size: 10px;
  margin: 4px 0 0;
  color: var(--muted);
}
.visual-bottom {
  display: block;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: #387b5c;
  margin-top: 19px;
}
.visual-bottom i {
  font-style: normal;
  color: #81b49c;
  margin-inline: 10px;
}
.principle-band {
  background: var(--student-soft);
}
.principle-band > .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-block: 24px;
}
.principle-band p {
  font-size: 20px;
  margin: 0;
  letter-spacing: -0.035em;
}
.principle-band > .container > span {
  font-size: 13px;
  color: var(--muted);
}
.section {
  padding-block: 92px;
}
.section-heading {
  margin-bottom: 37px;
}
.section-heading h2,
.audience-grid h2,
.faq-section h2 {
  font-size: 38px;
  line-height: 1.35;
  letter-spacing: -0.05em;
  margin: 0 0 18px;
}
.section-heading > p:last-child,
.section-description {
  font-size: 16px;
  color: var(--muted);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 25px;
  min-width: 0;
}
.feature-number {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 800;
  color: #267a58;
}
.feature-number span {
  font-size: 21px;
}
.feature h3 {
  font-size: 24px;
  letter-spacing: -0.04em;
  line-height: 1.45;
  margin: 22px 0 13px;
}
.feature p {
  color: var(--muted);
  font-size: 14px;
}
.feature-label {
  display: block;
  border-top: 1px solid var(--line);
  padding-top: 17px;
  margin-top: 20px;
  font-size: 11px;
  font-weight: 700;
  color: #21724e;
}
.feature-art {
  background: var(--student-soft);
  border-radius: 10px;
  min-height: 138px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 21px;
  gap: 10px;
}
.mini-file {
  background: #fff;
  border: 1px solid var(--line);
  padding: 12px;
  width: 68px;
  height: 89px;
  border-radius: 6px;
  transform: rotate(-7deg);
  box-shadow: 0 5px 14px #164d3210;
}
.mini-file span {
  font-size: 10px;
  font-weight: 800;
  color: #32825c;
}
.mini-file i {
  display: block;
  height: 3px;
  background: #d1eadd;
  margin-top: 10px;
}
.source-arrow {
  font-size: 20px;
  color: #529b74;
}
.mini-deck {
  padding: 13px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
}
.mini-deck span {
  display: block;
  font-size: 8px;
  color: #73a087;
}
.mini-deck b {
  display: block;
  font-size: 21px;
  margin: 7px 0;
}
.mini-deck small {
  font-size: 9px;
  color: var(--muted);
}
.answer-art {
  flex-direction: column;
  gap: 12px;
  padding: 16px;
}
.answer-art > span,
.answer-art small {
  font-size: 10px;
  color: var(--muted);
}
.answer-art > div {
  background: #fff;
  width: 95%;
  padding: 12px 17px;
  border-radius: 7px;
  border: 1px solid var(--line);
  color: #276f4d;
}
.answer-art b {
  font-size: 22px;
}
.answer-art b span {
  color: #80ad96;
}
.answer-art i {
  display: inline-block;
  width: 1px;
  height: 22px;
  background: #279162;
  vertical-align: middle;
}
.review-art {
  flex-direction: column;
  padding: 15px;
  gap: 11px;
}
.review-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 9px;
  background: #fff;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 12px;
}
.review-line > span {
  font-size: 8px;
  color: #537461;
}
.review-line i {
  margin-left: auto;
  font-size: 16px;
  color: #258c61;
  font-style: normal;
}
.review-art small {
  font-size: 9px;
  color: var(--muted);
}
.mint-tag {
  background: var(--note);
  padding: 3px;
  border-radius: 3px;
}