:root {
  color-scheme: light dark;
  --background: #f4f5f8;
  --surface: rgba(255, 255, 255, 0.88);
  --text: #121316;
  --secondary: #62666d;
  --accent: #139b76;
  --border: rgba(18, 19, 22, 0.10);
  --shadow: 0 18px 50px rgba(16, 41, 34, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #080a0a;
    --surface: rgba(28, 30, 30, 0.92);
    --text: #f5f7f6;
    --secondary: #a7aaa9;
    --border: rgba(255, 255, 255, 0.11);
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -10%, rgba(19, 155, 118, 0.16), transparent 36rem),
    var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  line-height: 1.55;
}

a { color: var(--accent); }

.shell {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 72px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 44px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 750;
  text-decoration: none;
}

.mark {
  display: block;
  width: 42px;
  height: 42px;
  border-radius: 13px;
  object-fit: cover;
  box-shadow: 0 8px 24px rgba(5, 55, 42, 0.18);
}

select {
  max-width: 160px;
  padding: 9px 32px 9px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

.hero { margin-bottom: 28px; }

h1 {
  max-width: 700px;
  margin: 0 0 12px;
  font-size: clamp(2.25rem, 8vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.lead {
  max-width: 690px;
  margin: 0;
  color: var(--secondary);
  font-size: 1.1rem;
}

.card {
  margin: 18px 0;
  padding: clamp(22px, 5vw, 34px);
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

h2 { margin: 0 0 12px; font-size: 1.3rem; }
p, ul { margin-top: 8px; margin-bottom: 0; }
ul { padding-inline-start: 22px; }
li + li { margin-top: 7px; }

.notice {
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
  background: color-mix(in srgb, var(--accent) 9%, var(--surface));
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--accent);
  color: white;
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}

footer {
  margin-top: 38px;
  color: var(--secondary);
  font-size: 0.9rem;
}

[data-language] { display: none; }
[data-language].active { display: block; }

@media (max-width: 520px) {
  header { align-items: flex-start; }
  .shell { width: min(100% - 24px, 860px); padding-top: 18px; }
  .brand span:last-child { display: none; }
  .card { border-radius: 22px; }
}