* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #111827 0, #05060a 55%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
}

.shell {
  max-width: 960px;
  width: 100%;
  background: linear-gradient(135deg, rgba(15,23,42,0.96), rgba(17,24,39,0.98));
  border-radius: 24px;
  border: 1px solid rgba(148,163,184,0.35);
  box-shadow:
    0 40px 80px rgba(0,0,0,0.65),
    0 0 0 1px rgba(15,23,42,0.9);
  padding: 32px 28px;
  position: relative;
  overflow: hidden;
}

.shell::before {
  content: "";
  position: absolute;
  inset: -40%;
  background:
    radial-gradient(circle at 0% 0%, rgba(79,209,197,0.12), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(129,140,248,0.18), transparent 55%);
  opacity: 0.9;
  pointer-events: none;
}

.inner {
  position: relative;
  z-index: 1;
}

h1 {
  margin-top: 18px;
  font-size: clamp(2.4rem, 4vw, 3.1rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h1 span {
  color: var(--accent);
}

.sub {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 480px;
}

.foot {
  margin-top: 10px;
  font-size: 11px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.foot a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted rgba(79,209,197,0.5);
}