body {
    font-family: sans-serif;
}
.container {
  max-width: 600px;
  margin: 2rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  text-align: center;
}
#image-container img {
  margin: 1.5rem 0;
  border-radius: 8px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.08);
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.guess-table {
  width: 100%;
  margin: 1.5em auto;
  border-collapse: collapse;
  max-width: 400px;
}
.guess-table th, .guess-table td {
  padding: 0.5em 0.7em;
  border-bottom: 1px solid #eee;
  text-align: center;
}
.arrow {
  font-size: 1.3em;
  font-weight: bold;
  margin-right: 0.3em;
  vertical-align: middle;
  display: inline-block;
  width: 1.5em;
}
.arrow.dark-red {
  color: #b71c1c;
}
.arrow.light-red {
  color: #e57373;
}
.arrow.orange {
  color: #ff9800;
}
.arrow.green {
  color: #43a047;
}
.result-label {
  margin-left: 0.2em;
  font-size: 0.95em;
}
#feedback {
  margin: 1em 0;
  color: #333;
}