:root {
  --ink: #102a24;
  --mist: #eff7f4;
  --foam: #f7fcfa;
  --teal: #0f8f78;
  --teal-deep: #0a5c4d;
  --signal: #1ec9a5;
  --muted: rgba(16, 42, 36, 0.62);
  --line: rgba(16, 42, 36, 0.1);
  --card: rgba(255, 255, 255, 0.72);
  --shadow: 0 18px 50px rgba(15, 92, 77, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "DM Sans", system-ui, sans-serif;
  background:
    radial-gradient(1000px 520px at 12% -10%, rgba(30, 201, 165, 0.28), transparent 60%),
    radial-gradient(900px 480px at 100% 0%, rgba(15, 143, 120, 0.18), transparent 55%),
    linear-gradient(165deg, #e7f6f1 0%, var(--foam) 42%, #e8f2ff 100%);
}

a {
  color: var(--teal-deep);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--teal);
}

.shell {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(15, 143, 120, 0.25);
}

.brand span {
  font-family: Sora, system-ui, sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.lang {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.lang button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: 600 0.85rem/1 Sora, system-ui, sans-serif;
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.lang button[aria-pressed="true"] {
  background: var(--teal);
  color: #fff;
}

.card {
  background: var(--card);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 28px;
  box-shadow: var(--shadow);
  padding: clamp(22px, 4vw, 40px);
}

h1,
h2,
h3 {
  font-family: Sora, system-ui, sans-serif;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
}

.meta {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.95rem;
}

h2 {
  margin: 28px 0 10px;
  font-size: 1.15rem;
  font-weight: 700;
}

p,
li {
  color: rgba(16, 42, 36, 0.86);
  line-height: 1.65;
  font-size: 1.02rem;
}

ul {
  padding-left: 1.2rem;
  margin: 8px 0 0;
}

li + li {
  margin-top: 6px;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}

.hero {
  text-align: center;
  padding: 48px 20px 20px;
}

.hero h1 {
  font-size: clamp(2.4rem, 7vw, 4rem);
}

.hero p {
  max-width: 34rem;
  margin: 12px auto 28px;
  color: var(--muted);
  font-size: 1.1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 16px;
  text-decoration: none;
  font-family: Sora, system-ui, sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--teal);
  color: #fff;
  box-shadow: 0 10px 24px rgba(15, 143, 120, 0.28);
}

.btn-primary:hover {
  background: var(--teal-deep);
  color: #fff;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  color: var(--ink);
}

.contact-box {
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(15, 143, 120, 0.08);
  border: 1px solid rgba(15, 143, 120, 0.16);
}

.contact-box strong {
  font-family: Sora, system-ui, sans-serif;
}

[data-lang] {
  display: none;
}

html[lang="en"] [data-lang="en"],
html[lang="ru"] [data-lang="ru"] {
  display: block;
}

html[lang="en"] li[data-lang="en"],
html[lang="ru"] li[data-lang="ru"] {
  display: list-item;
}

footer {
  margin-top: 28px;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 560px) {
  .top {
    align-items: flex-start;
    flex-direction: column;
  }
}