body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', 'Hiragino Kaku Gothic ProN', Meiryo, sans-serif;
  margin: 0;
  position: relative;
  background: #e0eafc; /* fallback */
}

#particles-js {
  position: fixed;
  width: 100vw;
  height: 100vh;
  inset: 0;
  z-index: 0;
}

.glass-container {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 20px;
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 40px 30px;
  text-align: center;
  max-width: 340px;
}

.glass-container h1 {
  margin: 0 0 18px 0;
  font-size: 1.7em;
  color: #333;
  letter-spacing: 0.03em;
}

.glass-container p {
  margin: 0 0 18px 0;
  color: #444;
  font-size: 1.1em;
  line-height: 1.7;
}

.maintenance-icon {
  font-size: 2.5em;
  display: block;
  margin: 0 auto;
}