:root {
  --ink: #141820;
  --ink-soft: #3d4452;
  --mist: #eef1f6;
  --white: #ffffff;
  --accent: #2f6fed;
  --font: "Inter", system-ui, sans-serif;
}

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

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 18%, rgba(47, 111, 237, 0.08), transparent 34%),
    radial-gradient(circle at 88% 82%, rgba(47, 111, 237, 0.06), transparent 30%),
    linear-gradient(165deg, var(--white) 0%, var(--mist) 100%);
}

.page {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 2rem 1.5rem;
}

.card {
  width: min(640px, 100%);
  text-align: center;
}

.mark {
  display: inline-block;
  margin-bottom: 2.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.headline {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.headline em {
  font-style: normal;
  color: var(--accent);
}

.subline {
  margin: 1.25rem auto 0;
  max-width: 28rem;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.rule {
  width: 3rem;
  height: 2px;
  margin: 2.5rem auto 0;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  border: 0;
}

.footer {
  margin-top: 3rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(61, 68, 82, 0.55);
}