body {
  font-family: 'Roboto', 'Helvetica', 'Arial', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  color: #333;
  text-align: center;
}

.mdl-layout__content {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.mdl-card {
  width: 100%;
  max-width: 500px;
  margin: 1rem;
}

.mdl-card__supporting-text {
  width: auto;
  padding: 1rem;
}

.mdl-card__title {
  display: block;
}

.mdl-textfield {
  width: 100%;
}

#historyList {
  list-style-type: none;
  padding: 0;
}