body {
  font-family: Arial, sans-serif;
  max-width: 900px;
  margin: auto;
  padding: 16px;
}

h2, h3 {
  text-align: center;
}

#mode-select {
  text-align: center;
  margin-bottom: 20px;
}

#timer {
  text-align: right;
  font-weight: bold;
  margin-bottom: 10px;
}

.question {
  font-weight: bold;
  margin-bottom: 8px;
}

.options label {
  display: block;
  margin-bottom: 6px;
  cursor: pointer;
}

img {
  max-width: 180px;
  margin: 8px 0;
  display: block;
}

button {
  padding: 8px 16px;
  margin-top: 10px;
}

.feedback {
  margin-top: 10px;
  font-weight: bold;
}

.correct { color: green; }
.wrong { color: red; }

.bookmark {
  cursor: pointer;
  font-size: 18px;
  margin-bottom: 8px;
}

.stat-box {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 12px;
  margin-bottom: 12px;
}

/* ---- Road signs ---- */
.sign-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
}

.sign-card {
  border: 1px solid #ccc;
  border-radius: 6px;
  padding: 10px;
  text-align: center;
}

.sign-card img {
  max-width: 80px;
  margin-bottom: 8px;
  margin-left: auto;
  margin-right: auto;
}

.sign-label {
  font-weight: bold;
  margin-bottom: 4px;
}

@media (max-width: 600px) {
  button {
    width: 100%;
  }
}