/* General page styling */
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", sans-serif;
  background-color: #fff7e6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  color: #333;
}

/* Headings and paragraphs */
h1 {
  font-size: 2.5rem;
  margin: 1rem 0 0.5rem;
  color: #d17a00;
}
p {
  font-size: 1.1rem;
  max-width: 600px;
}

/* Images */
img {
  max-width: 300px;
  border-radius: 1rem;
  box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

/* Buttons */
button, .button {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  background-color: #ffa94d;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  color: white;
  text-decoration: none;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
button:hover, .button:hover {
  background-color: #ff922b;
}

/* Secret/invisible links */
.secret-link,
.hidden-link {
  position: absolute;
  width: 40px;
  height: 40px;
  opacity: 0;
  cursor: pointer;
}
.secret-link {
  top: 10px;
  right: 10px;
}
.hidden-link {
  bottom: 10px;
  left: 10px;
}

/* Toast popups (knowledge points, etc.) */
.toast {
  position: fixed;
  bottom: 18px;
  right: 18px;
  background:#1e1e1e;
  color:#fff;
  padding:.5rem .75rem;
  border:1px solid #333;
  border-radius:8px;
  font-size:.9rem;
  display:none;
}

/* Error messages */
.error {
  color:#ff6b6b;
  font-size:.95rem;
  margin-top:.5rem;
  display:none;
}