body {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  height: 100vh;
  margin: 0;
  font-family: "Arial", sans-serif;
  background-color: #f4f4f4;
}

.header {
  position: absolute;
  top: 20px;
  left: 20px;
}

.site-name {
  font-size: 20px;
  font-weight: bold;
  color: #333;
  text-decoration: none;
  position: relative;
}

.site-name::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  display: block;
  margin-top: 5px;
  right: 0;
  background: #333;
  transition: width 0.3s ease, background-color 0.3s ease;
}

.site-name:hover::after {
  width: 100%;
  left: 0;
  background: #555;
}

.container {
  text-align: center;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.center-image {
  max-width: 100%;
  height: auto;
  margin-bottom: 20px;
}

p {
  margin-top: 20px;
  color: #666;
}

.footer {
  width: 100%;
  text-align: center;
  padding: 10px;
  bottom: 0;
}