body {
  font-family: sans-serif;
  margin: 0;
  background: #f5f5f5;
  text-align: center;
}

header {
  background: #257cff;
  color: white;
  padding: 1rem;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

section {
  padding: 120px 20px 80px;
}

.controls {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 20px;
}

select {
  font-size: 18px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #ccc;
}

#scheduleImage,
#errorImage {
  max-width: 95%;
  margin: 20px auto;
  display: block;
}

#errorBox {
  display: none;
}

#errorMessage {
  color: red;
  font-size: 18px;
}

.footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  background: #555;
  color: white;
  padding: 5px;
}