:root {
  color-scheme: light dark;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: #0f172a;
  color: #e5e7eb;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.28), transparent 32%),
    radial-gradient(circle at bottom right, rgba(129, 140, 248, 0.28), transparent 34%),
    #0f172a;
}

.card {
  width: min(100%, 620px);
  padding: 44px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 28px;
  background: rgba(15, 23, 42, 0.78);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
  text-align: center;
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 12px;
  color: #38bdf8;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 7vw, 56px);
  line-height: 1.1;
}

.ip {
  margin: 28px 0 18px;
  padding: 22px 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
  color: #f8fafc;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(28px, 7vw, 54px);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.message {
  min-height: 28px;
  margin: 0 0 26px;
  color: #cbd5e1;
  font-size: 16px;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 14px 24px;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
  color: #020617;
  cursor: pointer;
  font-size: 16px;
  font-weight: 800;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}