:root {
  color-scheme: light;
  font-family:
    Roboto,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Hiragino Kaku Gothic ProN",
    "Noto Sans",
    Arial,
    sans-serif;
  font-synthesis: none;
  color: var(--ink);
  background: var(--paper);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 2rem;
}
body {
  margin: 0;
}
a {
  color: var(--primary);
  text-underline-offset: 0.2em;
}
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 4px;
}
p {
  overflow-wrap: anywhere;
  hyphens: auto;
  line-height: 1.8;
}
.site-header,
.site-footer,
main > section {
  max-width: 1200px;
  margin-inline: auto;
}
.site-header {
  padding: 24px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 3;
}
.brand {
  font-size: 25px;
  font-weight: 600;
  color: var(--heading);
  letter-spacing: -0.025em;
  text-decoration: none;
  line-height: 1.5;
}
.site-header nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  font-size: 14px;
}
.support-link {
  text-decoration: none;
}
.locale-menu {
  position: relative;
}
.locale-menu summary {
  cursor: pointer;
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  list-style: none;
  max-width: 100%;
  overflow-wrap: anywhere;
}
.locale-menu summary:after {
  content: "▾";
  font-size: 12px;
}
.locale-menu summary::-webkit-details-marker {
  display: none;
}
.current-language {
  font-weight: 600;
  color: var(--heading);
}
.locale-menu ul {
  list-style: none;
  padding: 8px;
  margin: 8px 0 0;
  position: absolute;
  right: 0;
  top: 100%;
  width: 240px;
  max-width: calc(100vw - 40px);
  max-height: 65vh;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 8px 24px #17332f18;
  z-index: 5;
}
.locale-menu li a {
  display: block;
  padding: 10px 14px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink);
  line-height: 1.5;
}
.locale-menu li a:hover,
.locale-menu li a[aria-current] {
  background: var(--container);
  color: var(--primary);
}
.skip {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 10;
  background: var(--primary);
  color: var(--on-primary);
  padding: 12px;
  border-radius: 12px;
}
.skip:focus {
  top: 16px;
}
.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 70px;
  align-items: center;
  padding: 56px 60px 72px;
}
.hero-copy {
  min-width: 0;
}
.eyebrow {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.6;
  letter-spacing: 0.04em;
}
.hero h1 {
  text-wrap: balance;
  font-size: clamp(34px, 4.4vw, 56px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.035em;
  color: var(--heading);
  margin: 24px 0;
  overflow-wrap: anywhere;
}
.intro {
  font-size: 18px;
  max-width: 540px;
}
.actions {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 28px;
}
.button {
  display: inline-flex;
  gap: 22px;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  background: var(--primary);
  color: var(--on-primary);
  border: 1px solid var(--primary);
  border-radius: 12px;
  padding: 15px 22px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  max-width: 100%;
  overflow-wrap: anywhere;
}
.button:hover {
  filter: brightness(0.95);
}
.text-link {
  font-size: 15px;
  line-height: 1.6;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  max-width: 100%;
  overflow-wrap: anywhere;
}
.beta-chip {
  display: inline-block;
  max-width: 100%;
  font-size: 12px;
  color: var(--primary);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
  margin-top: 28px;
}
.app-figure {
  margin: 0;
  min-width: 0;
  max-width: 350px;
  justify-self: center;
  width: 100%;
}
.app-screen {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--paper);
}
figcaption {
  color: var(--ink);
  font-size: 12px;
  line-height: 1.7;
  padding-top: 16px;
}
.explore {
  padding: 60px 40px 64px;
  border-top: 1px solid var(--line);
}
.section-heading {
  max-width: 800px;
  margin: 0 auto 32px;
  text-align: center;
}
h2 {
  font-size: 32px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.025em;
  color: var(--heading);
  margin: 0 0 18px;
  overflow-wrap: anywhere;
}
.section-heading > p {
  margin-bottom: 0;
}
.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.features article {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  padding: 24px;
}
.step-number {
  display: inline-block;
  border-radius: 50%;
  padding: 8px 10px;
  background: var(--container);
  color: var(--primary);
  font-size: 14px;
}
.features h3 {
  font-size: 20px;
  line-height: 1.45;
  font-weight: 600;
  margin: 22px 0 12px;
  color: var(--heading);
  overflow-wrap: anywhere;
}
.features p {
  font-size: 15px;
  margin: 0;
}
.lesson {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 70px;
  align-items: center;
  padding: 48px 60px 72px;
}
.lesson > div {
  max-width: 500px;
}
.lesson p {
  font-size: 17px;
}
.lesson .app-figure {
  max-width: 320px;
}
.beta {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.beta p:first-child {
  margin-top: 0;
}
.beta h2 {
  font-size: 30px;
}
.beta > div > p {
  font-size: 15px;
}
.help {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  padding: 64px 40px;
}
.help > div {
  max-width: 720px;
}
.help h2 {
  font-size: 28px;
}
.help p {
  font-size: 15px;
}
.button-outline {
  background: var(--surface);
  color: var(--primary);
  flex-shrink: 0;
}
.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.site-footer nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
  line-height: 1.7;
}
.operator {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 24px;
  flex-basis: 100%;
  font-size: 12px;
  line-height: 1.7;
}
.operator a {
  text-decoration: none;
}
.legal {
  max-width: 860px;
  margin: auto;
  padding: 48px 36px 80px;
}
.back {
  display: inline-block;
  font-size: 14px;
  margin-bottom: 32px;
  line-height: 1.6;
}
.legal h1,
.not-found h1 {
  font-size: 40px;
  font-weight: 500;
  color: var(--heading);
  line-height: 1.3;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
}
.updated {
  font-size: 13px;
  line-height: 1.8;
}
.legal-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin: 28px 0 36px;
  border-block: 1px solid var(--line);
  padding: 20px 0;
  font-size: 14px;
  line-height: 1.6;
}
.legal-nav [aria-current] {
  font-weight: 700;
}
.legal-body {
  font-size: 16px;
  line-height: 1.85;
  overflow-wrap: anywhere;
}
.legal-body h3 {
  font-size: 21px;
  font-weight: 500;
  margin: 32px 0 14px;
}
.legal-body ul {
  padding-left: 24px;
}
.legal-body li {
  margin-block: 16px;
}
.website-privacy {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding-top: 32px;
}
.website-privacy h2 {
  font-size: 26px;
}
.not-found {
  max-width: 900px;
  margin: auto;
  padding: 80px 32px 120px;
}
.not-found p {
  overflow-wrap: anywhere;
  hyphens: auto;
  line-height: 1.8;
}
.not-found .button {
  margin-top: 20px;
}
@media (max-width: 1200px) {
  .beta {
    margin-inline: 24px;
  }
}
@media (max-width: 900px) {
  .site-header {
    padding: 20px 28px;
  }
  .hero,
  .lesson {
    padding: 44px 32px 56px;
    gap: 36px;
  }
  .hero h1 {
    text-wrap: balance;
    font-size: 40px;
  }
  .intro {
    font-size: 16px;
  }
  .app-figure {
    max-width: 300px;
  }
  .features {
    gap: 14px;
  }
  .features article {
    min-width: 0;
    padding: 20px;
  }
  .explore {
    padding: 44px 28px;
  }
  .beta {
    gap: 28px;
    padding: 32px;
  }
  .help {
    padding: 48px 28px;
  }
  .site-footer {
    padding: 28px;
  }
  h2 {
    font-size: 28px;
  }
}
@media (max-width: 650px) {
  .site-header {
    padding: 16px 20px;
    gap: 16px;
  }
  .brand {
    font-size: 23px;
  }
  .site-header nav {
    gap: 12px;
    font-size: 13px;
    min-width: 0;
  }
  .support-link {
    display: none;
  }
  .locale-menu summary {
    padding: 9px 12px;
    gap: 8px;
  }
  .hero,
  .lesson {
    display: flex;
    flex-direction: column;
    padding: 40px 24px;
    gap: 32px;
    align-items: stretch;
  }
  .hero h1 {
    text-wrap: balance;
    font-size: 36px;
    line-height: 1.3;
    margin-block: 20px;
  }
  .intro {
    font-size: 16px;
  }
  .actions {
    gap: 20px;
  }
  .app-figure,
  .lesson .app-figure {
    width: 100%;
    max-width: 340px;
    align-self: center;
  }
  .app-figure figcaption {
    font-size: 12px;
  }
  .eyebrow {
    font-size: 12px;
  }
  .explore {
    padding: 40px 24px;
  }
  .section-heading {
    text-align: left;
  }
  .features {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .features article {
    min-width: 0;
    padding: 24px;
  }
  .features h3 {
    margin-top: 18px;
    font-size: 22px;
  }
  .features p {
    font-size: 16px;
  }
  .lesson {
    padding-top: 16px;
  }
  .lesson p {
    font-size: 16px;
  }
  .beta {
    grid-template-columns: minmax(0, 1fr);
    margin-inline: 16px;
    padding: 24px;
    gap: 16px;
  }
  .beta h2 {
    font-size: 28px;
    margin-bottom: 0;
  }
  .beta .eyebrow {
    font-size: 12px;
  }
  .help {
    display: block;
    padding: 44px 24px;
  }
  .help h2 {
    font-size: 26px;
  }
  .help .button {
    margin-top: 16px;
  }
  .site-footer {
    padding: 28px 24px;
    gap: 24px;
  }
  .site-footer nav {
    gap: 18px;
    font-size: 13px;
  }
  .operator {
    gap: 12px;
    font-size: 12px;
  }
  .legal {
    padding: 32px 24px 64px;
  }
  .legal h1 {
    font-size: 32px;
  }
  .legal-nav {
    gap: 18px;
  }
  .legal-body {
    font-size: 16px;
  }
  .website-privacy h2 {
    font-size: 24px;
  }
  .not-found {
    padding: 64px 24px 96px;
  }
  .not-found h1 {
    font-size: 34px;
  }
}
@media (max-width: 360px) {
  .site-header {
    gap: 12px;
  }
  .site-header nav {
    font-size: 12px;
  }
  .locale-menu summary {
    padding: 8px;
  }
  .hero,
  .lesson {
    padding-inline: 20px;
  }
  .hero h1 {
    text-wrap: balance;
    font-size: 32px;
  }
  .button {
    padding: 14px 18px;
    font-size: 14px;
    gap: 16px;
  }
  .text-link {
    font-size: 14px;
  }
  .site-footer nav {
    gap: 14px;
  }
  h2 {
    font-size: 26px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}