body {
  font-family: 'Segoe UI', sans-serif;
  max-width: 800px;
  margin: 2rem auto;
  padding: 1rem;
  line-height: 1.6;
  color: #333;
}

h1,
h2 {
  color: #2c3e50;
  margin-top: 1.5rem;
}

p {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

ul {
  margin-left: 1.5rem;
  margin-bottom: 1rem;
}

code {
  background-color: #f4f4f4;
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 0.95em;
}

footer {
  margin-top: 3rem;
  font-size: 0.9em;
  color: #888;
  border-top: 1px solid #eee;
  padding-top: 1rem;
  text-align: center;
}

/* Snackbar container */
#snackbar {
  visibility: hidden;
  min-width: 220px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 4px;
  padding: 12px;
  position: fixed;
  z-index: 1000;
  left: 50%;
  bottom: 30px;
  font-size: 14px;
  transform: translateX(-50%);
  transition: visibility 0s, opacity 0.3s ease-in-out;
  opacity: 0;
}

#snackbar.show {
  visibility: visible;
  opacity: 1;
}

button.copy-btn {
  margin-left: 8px;
  padding: 5px 12px;
  font-size: 14px;
  cursor: pointer;
  border: none;
  background-color: #2c3e50;
  color: white;
  border-radius: 4px;
  transition: background-color 0.2s ease-in-out;
}

button.copy-btn:hover,
button.copy-btn:focus {
  background-color: #1a2733;
  outline: none;
  box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.6);
}