:root {
  --bg: #FBF8F3;
  --surface: #FFFFFF;
  --surface2: #F4EFE8;
  --surface3: #E9E2D7;
  --line: #E4DCD1;
  --ink: #2A2521;
  --ink2: #5E564E;
  --ink3: #6F665C;
  --primary: #2B7766;
  --on-primary: #FFFFFF;
  --tint: #DCEEE7;
  --on-tint: #17493E;
  --sun: #F2B544;
  --sun-tint: #FBEBC8;
  --on-sun: #4A3300;
  --danger: #B3412F;
  --danger-tint: #F7E1DB;
  --shadow: 0 1px 2px rgba(42, 37, 33, 0.06), 0 4px 14px rgba(42, 37, 33, 0.06);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171412;
    --surface: #211D1A;
    --surface2: #2A2521;
    --surface3: #352F2A;
    --line: #3A332D;
    --ink: #F2EBE2;
    --ink2: #C2B8AB;
    --ink3: #9B9084;
    --primary: #86CDB8;
    --on-primary: #0C2A22;
    --tint: #23423A;
    --on-tint: #BFE8DB;
    --sun: #F2C063;
    --sun-tint: #3D3118;
    --on-sun: #F6D58E;
    --danger: #F0907E;
    --danger-tint: #4A2620;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 14px rgba(0, 0, 0, 0.25);
  }
}

html[data-lang="en"] [lang="uk"],
html[data-lang="uk"] [lang="en"] { display: none; }

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

h1, h2, h3 { line-height: 1.25; margin: 1.5em 0 0.5em; }
h1 { font-size: 2rem; margin-top: 0; }
h2 { font-size: 1.4rem; }
p, ul, ol { margin: 0 0 1em; }
img, svg { max-width: 100%; height: auto; }

a { color: var(--primary); text-underline-offset: 0.15em; }

:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.page {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.hero {
  text-align: center;
  padding: 2rem 0 1.5rem;
}
.hero p { color: var(--ink2); font-size: 1.125rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 1rem 1.25rem;
  margin: 0 0 1rem;
}
.card h3 { margin-top: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  border: 2px solid transparent;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.lang-switch {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.lang-switch button {
  min-height: 44px;
  min-width: 44px;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface2);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
html[data-lang="en"] .lang-switch button[data-set-lang="en"],
html[data-lang="uk"] .lang-switch button[data-set-lang="uk"] {
  background: var(--tint);
  color: var(--on-tint);
  border-color: var(--primary);
}

.footer {
  max-width: 40rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink2);
  font-size: 0.9rem;
  text-align: center;
}

.join-code {
  margin: 0.5rem 0 1rem;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-align: center;
  color: var(--on-tint);
  background: var(--tint);
  border-radius: 16px;
  padding: 0.75rem 1rem;
  overflow-wrap: anywhere;
}
.join-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin: 0 0 1rem;
}