* {
  box-sizing: border-box;
}

:root {
  --background: #020407;
  --panel: rgba(6, 16, 28, 0.78);
  --panel-border: rgba(0, 160, 255, 0.28);
  --text-main: #f5f9ff;
  --text-muted: #b9c8d8;
  --accent: #08a8ff;
  --accent-soft: rgba(8, 168, 255, 0.22);
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at 50% 18%, var(--accent-soft), transparent 28rem),
    radial-gradient(circle at 15% 80%, rgba(8, 168, 255, 0.08), transparent 25rem),
    var(--background);
}

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

.card {
  width: min(820px, 100%);
  padding: clamp(2rem, 5vw, 4.5rem);
  border: 1px solid var(--panel-border);
  border-radius: 32px;
  background: linear-gradient(180deg, rgba(9, 23, 39, 0.86), var(--panel));
  box-shadow:
    0 0 80px rgba(0, 142, 255, 0.16),
    0 30px 100px rgba(0, 0, 0, 0.55);
  text-align: center;
}

.logo {
  width: min(360px, 76vw);
  height: auto;
  display: block;
  margin: 0 auto 1.6rem;
  border-radius: 24px;
}

h1 {
  margin: 0;
  font-size: clamp(2.25rem, 6vw, 4.75rem);
  line-height: 1;
  letter-spacing: -0.055em;
}

.tagline {
  max-width: 640px;
  margin: 1.35rem auto 0;
  color: var(--text-main);
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  line-height: 1.55;
}

.note {
  max-width: 650px;
  margin: 1.3rem auto 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

.contact {
  margin: 2rem 0 0;
  font-size: 1.08rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(8, 168, 255, 0.48);
}

a:hover,
a:focus {
  border-bottom-color: var(--accent);
}

@media (max-width: 520px) {
  .page {
    padding: 1rem;
  }

  .card {
    border-radius: 24px;
  }

  .logo {
    width: min(300px, 82vw);
  }
}