* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', Arial, sans-serif;
  overflow: hidden;
  position: relative;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 20% 20%, #ff5f6d55, transparent 40%),
    radial-gradient(circle at 80% 30%, #4facfe55, transparent 45%),
    radial-gradient(circle at 50% 90%, #a770ef55, transparent 45%),
    linear-gradient(135deg, #1c1c2b, #2b1c3d);
}

.panel {
  width: 340px;
  padding: 36px 30px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 18px;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  text-align: center;
  color: #fff;
}

.panel h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: 0.5px;
}

.sub {
  margin: 6px 0 28px 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.links {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.link-btn {
  display: block;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  transition: background 0.2s ease, transform 0.15s ease;
}

.link-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-2px);
}

.link-btn:active {
  transform: translateY(0);
}