:root {
  color-scheme: light;
  --sky: #075985;
  --sky-strong: #0369a1;
  --sky-soft: #e0f2fe;
  --gold: #c0841a;
  --ink: #292524;
  --muted: #57534e;
  --paper: #fdfbf7;
  --line: #e7e5e4;
  --green: #047857;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
  min-width: 0;
}

html {
  background: var(--paper);
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: var(--sky);
  font-weight: 800;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

p {
  margin: 0;
}

ul,
ol {
  padding-left: 1.35rem;
}

li {
  margin: .45rem 0;
}

.site-header,
.site-main,
.site-footer {
  width: min(72rem, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  font-size: 1.05rem;
  font-weight: 950;
  color: var(--sky);
}

.site-brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.site-nav,
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  font-size: .92rem;
}

.site-nav {
  justify-content: flex-end;
}

.site-footer {
  padding: 2rem 0 3rem;
  color: #78716c;
  font-size: .9rem;
}

.site-footer nav {
  justify-content: flex-start;
  margin-top: .75rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, .95fr);
  gap: clamp(1.25rem, 4vw, 3rem);
  align-items: center;
  padding: clamp(2rem, 6vw, 5rem) 0 2rem;
}

h1 {
  margin: 0;
  color: var(--sky);
  font-size: clamp(2.2rem, 6vw, 4.8rem);
  line-height: 1;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 .75rem;
  color: var(--sky);
  font-size: clamp(1.45rem, 3vw, 2.1rem);
  line-height: 1.15;
}

h3 {
  margin: 0 0 .35rem;
  color: var(--ink);
  font-size: 1.05rem;
}

.lead {
  margin-top: 1rem;
  max-width: 42rem;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 650;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.35rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: .8rem 1rem;
  border-radius: 8px;
  background: var(--sky);
  color: var(--white);
  box-shadow: 0 12px 28px rgba(7, 89, 133, .16);
}

.button.secondary {
  background: var(--white);
  color: var(--sky);
  border: 1px solid var(--line);
  box-shadow: none;
}

.device {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--white);
  padding: .85rem;
  box-shadow: 0 24px 60px rgba(41, 37, 36, .16);
}

.screen {
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid #bae6fd;
  background: linear-gradient(180deg, #e0f2fe, #fff 34%);
}

.screen-top {
  padding: 1rem;
  color: var(--white);
  background: var(--sky);
}

.screen-top strong {
  display: block;
  font-size: 1.15rem;
}

.screen-body {
  padding: 1rem;
  display: grid;
  gap: .75rem;
}

.lesson-card {
  border: 1px solid var(--line);
  border-left: 6px solid var(--gold);
  border-radius: 8px;
  background: #fffdf8;
  padding: .9rem;
}

.lesson-card small {
  display: block;
  color: var(--green);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.language-row {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.chip {
  border-radius: 999px;
  background: var(--sky-soft);
  color: var(--sky);
  padding: .25rem .55rem;
  font-size: .8rem;
  font-weight: 900;
}

.band {
  border-top: 1px solid var(--line);
  padding: clamp(1.5rem, 5vw, 3rem) 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.tile,
.legal-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 1.25rem;
}

.tile p,
.legal-card p {
  color: var(--muted);
  font-weight: 600;
}

.quote,
.notice {
  border-left: 6px solid var(--gold);
  background: #fffdf4;
  border-radius: 8px;
  padding: 1rem;
  color: var(--muted);
  font-weight: 750;
}

.legal-main {
  width: min(48rem, calc(100% - 2rem));
  margin: 1.5rem auto 0;
  padding-bottom: 1rem;
}

.legal-main h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: .35rem;
}

.legal-card {
  margin-top: 1.25rem;
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 1.25rem;
  }

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