body {
  font-family:'Noto Sans JP',sans-serif;
  color: #333;
  background-color: #e0e5ec;
  padding: 30px 4%;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.page_wrap {
  width: 100%;
}

.page_title {
  display: block;
  font-size: 3rem;
  color: #292933;
  margin-bottom: 1em;
}

.description {
  font-size: 1.5rem;
  line-height: 1.4;
  color: #292933;
}

.column_wrap {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  margin-top: 20px;
}

.column {
  width: 100%;
  margin-top: 30px;
  font-size: 1.4rem;
  flex: 1;
}

.json_input {
  display: block;
  width: 100%;
  height: 350px;
  padding: 1.4rem;
  font-family: "Courier New", monospace;
  font-size: 1.4rem;
  background-color: #e0e5ec;
  box-shadow: inset 5px 5px 10px #b8bec5, inset -5px -5px 10px #ffffff;
  border: none;
  border-radius: 10px;
  resize: none;
}

.json_output {
  width: 100%;
  height: 350px;
  padding: 1.4rem;
  font-family: "Courier New", monospace;
  font-size: 1.4rem;
  background-color: #e0e5ec !important;
  margin: 0 !important;
  border-radius: 10px;
  box-shadow: inset 5px 5px 10px #b8bec5, inset -5px -5px 10px #ffffff;
}

.button {
  display: block;
  width: 100%;
  margin-top: 20px;
  padding: 1rem;
  font-size: 1.6rem;
  color: #292933;
  background-color: #e0e5ec;
  box-shadow: 5px 5px 10px #b8bec5, -5px -5px 10px #ffffff;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.button:hover,
.button:focus {
  box-shadow: inset 5px 5px 10px #b8bec5, inset -5px -5px 10px #ffffff;
}

.error_text { 
  font-size: 1.4rem;
  color: #d9534f;
  margin-top: 30px;
  font-weight: bold;
}

@media screen and (max-width: 960px) {
  .column_wrap {
    flex-direction: column;
  }
}