```css
/* Maintenance page */

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;

  padding: 30px 20px;
  box-sizing: border-box;

  background:
    radial-gradient(circle at top, #24364b 0%, #121c29 42%, #090e15 100%);

  color: #f5f7fa;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

.container {
  width: 100%;
  max-width: 900px;

  padding: 55px 60px;
  box-sizing: border-box;

  text-align: center;

  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;

  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

h1 {
  max-width: 750px;
  margin: 0 auto 30px;

  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.8px;

  color: #ffffff;
}

h1::before {
  content: "⚙";
  display: block;

  width: 72px;
  height: 72px;
  margin: 0 auto 28px;

  line-height: 72px;
  font-size: 35px;

  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;

  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.25);

  animation: rotateGear 8s linear infinite;
}

.content {
  max-width: 650px;
  margin: 0 auto;

  padding-top: 25px;

  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;

  color: #b9c4d0;

  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.content a {
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;

  border-bottom: 1px solid rgba(255, 255, 255, 0.35);

  transition: 0.2s ease;
}

.content a:hover {
  color: #b9d8ff;
  border-color: #b9d8ff;
}

#social {
  margin-top: 35px;
}

@keyframes rotateGear {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 768px) {
  body {
    padding: 18px;
  }

  .container {
    padding: 40px 24px;
    border-radius: 18px;
  }

  h1 {
    font-size: 29px;
    letter-spacing: -0.4px;
  }

  h1::before {
    width: 62px;
    height: 62px;
    line-height: 62px;
    font-size: 30px;
    margin-bottom: 22px;
  }

  .content {
    font-size: 16px;
  }
}
```