/* reset */
body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
  background: #f9f9f9;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

/* centered container */
.container {
  margin-top: 40px;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  text-align: center;
  width: 90%;
  max-width: 600px;
}

/* form layout */
#data-form {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 20px;
}

#data-form input {
  padding: 8px 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 14px;
  flex: 1;
}

#data-form button {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  background: #36a2eb;
  color: white;
  font-size: 14px;
  cursor: pointer;
}

#data-form button:hover {
  background: #258acb;
}

/* die roll button */
#roll-die {
  margin-bottom: 20px;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  background: #4caf50;
  color: white;
  font-size: 14px;
  cursor: pointer;
}

#roll-die:hover {
  background: #3a8d3e;
}

/* chart sizing */
#data-chart {
  max-width: 100%;
  width: 100%;
  height: 300px;
}