:root {
  color-scheme: light;
  --ink: #18243d;
  --muted: #54627a;
  --line: #d9e2ec;
  --paper: #ffffff;
  --soft: #f4f8fb;
  --accent: #0e7c86;
  --accent-dark: #075f67;
  --warm: #f3b246;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #eef6f7 0%, #ffffff 52%, #f8faf7 100%);
}

a {
  color: inherit;
}

.page-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 44px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(220px, 360px) minmax(0, 1fr);
  gap: 44px;
  align-items: center;
  min-height: 54vh;
}

.brand {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(24, 36, 61, 0.08);
}

.brand img {
  display: block;
  width: min(100%, 320px);
  height: auto;
}

.status {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #fff5dc;
  color: #6d4a04;
  font-size: 0.9rem;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.8rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.55;
}

.free-learning {
  margin-top: 26px;
  padding: 20px;
  background: #ffffff;
  border: 2px solid var(--accent);
  border-radius: 8px;
  box-shadow: 0 14px 34px rgba(14, 124, 134, 0.12);
}

.free-learning p {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.15;
}

.free-learning span {
  display: block;
  margin-top: 4px;
  color: var(--ink);
  font-size: 0.72em;
}

.free-learning ul {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.free-learning li {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 8px 10px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.2;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.button:focus,
.button:hover {
  background: var(--accent-dark);
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 38px;
}

article {
  padding: 24px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.lang {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.3rem;
  line-height: 1.25;
  letter-spacing: 0;
}

article p:not(.lang) {
  margin: 0 0 14px;
  color: var(--muted);
  line-height: 1.65;
}

article p:last-child {
  margin-bottom: 0;
}

.reviews {
  margin-top: 28px;
  padding: 30px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.section-heading {
  max-width: 780px;
}

.section-heading h2 {
  font-size: 1.8rem;
}

.section-heading p:not(.lang) {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

figure {
  margin: 0;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

blockquote {
  margin: 0;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.65;
}

figcaption {
  margin-top: 16px;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 700;
}

.review-action {
  margin-top: 20px;
}

.text-link {
  color: var(--accent-dark);
  font-weight: 700;
  text-underline-offset: 4px;
}

.examples {
  margin-top: 28px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.topic {
  min-height: 180px;
  padding: 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

h3 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  line-height: 1.3;
  letter-spacing: 0;
}

.topic p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.site-footer a,
.back-link,
.legal-content a {
  color: var(--accent-dark);
  font-weight: 700;
  text-underline-offset: 4px;
}

.legal-page {
  max-width: 920px;
}

.legal-header {
  padding: 18px 0 28px;
}

.legal-header h1 {
  margin-top: 16px;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
}

.legal-content {
  display: grid;
  gap: 16px;
}

.legal-content article {
  padding: 28px;
}

.legal-content p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

@media (max-width: 820px) {
  .page-shell {
    width: min(100% - 24px, 680px);
    padding: 24px 0;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
    min-height: auto;
  }

  .brand {
    padding: 18px;
  }

  .brand img {
    width: min(100%, 260px);
  }

  .free-learning ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .reviews {
    padding: 22px;
  }

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

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

  .topic {
    min-height: auto;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}