:root {
  --bg-top: #0b1020;
  --bg-bottom: #0f172a;
  --panel: rgba(18, 26, 47, 0.85);
  --text: #eef2ff;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #ffffff;
  --accent-text: #0b1020;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.08), transparent 30%),
    linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
}

.wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 760px;
  padding: 40px 32px;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 20px;
  backdrop-filter: blur(8px);
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.05;
}

.actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 2px;
}

.btn-primary {
  color: var(--accent-text);
  background: var(--accent);
}

@media (max-width: 640px) {
  .card {
    padding: 28px 20px;
    border-radius: 16px;
  }

  .actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}