:root,
[data-theme="light"] {
  --bg: #f4fbfb;
  --text: #0f1f24;
  --accent: #0d6e6e;
  --card: rgba(255, 255, 255, 0.88);
}

[data-theme="dark"] {
  --bg: #0a1418;
  --text: #e8f2f4;
  --accent: #3ec9c0;
  --card: rgba(18, 30, 36, 0.92);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: Tahoma, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, color-mix(in srgb, var(--accent) 18%, transparent), var(--bg));
  color: var(--text);
}

.shell {
  width: min(92vw, 40rem);
  padding: 2rem;
  border-radius: 1.25rem;
  background: var(--card);
  box-shadow: 0 1rem 2.5rem rgba(0, 0, 0, 0.12);
  text-align: center;
}

.badge {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  color: var(--accent);
  font-size: 0.9rem;
}

h1 { margin: 0 0 0.75rem; font-size: clamp(1.75rem, 4vw, 2.5rem); }
.lead { margin: 0 0 1rem; line-height: 1.8; }
.meta { margin: 0; opacity: 0.8; font-size: 0.95rem; }
.ltr { direction: ltr; unicode-bidi: isolate; }