body {
  font-family: sans-serif;
  padding: 16px;
  font-size: 16px;
  line-height: 1.6;
  background-color: #fff;
  color: #333;
}

h1 {
  font-size: 24px;
  margin-bottom: 20px;
  text-align: center;
}

label {
  display: block;
  margin-top: 16px;
  font-weight: bold;
}

textarea,
input[type="text"],
input[type="number"] {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  margin-top: 8px;
  box-sizing: border-box;
}

button {
  display: block;
  width: 100%;
  padding: 12px;
  font-size: 16px;
  margin-top: 16px;
  background-color: #0078D4;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #005ea2;
}

pre {
  background-color: #f4f4f4;
  padding: 10px;
  white-space: pre-wrap;
  word-wrap: break-word;
  border-radius: 6px;
  margin-top: 8px;
}

.emoji-sample {
  font-size: 20px;
  margin-top: 8px;
}

#output {
  white-space: pre;         /* 改行やスペースをそのまま表示 */
  overflow-x: auto;         /* 横スクロールバーを表示 */
  word-wrap: normal;        /* 単語の途中で改行しない */
  max-width: 100%;          /* 親要素の幅に収める */
}

.input-with-button {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 8px;
}

.one-char-button {
  font-size: 1em;
  padding: 2px 6px;
  width: 32px;
  height: 32px;
  line-height: 1;
  text-align: center;
  cursor: pointer;
}

.count-button {
  font-size: 1em;
  padding: 2px 6px;
  width: 70px;
  height: 32px;
  line-height: 1;
  text-align: center;
  cursor: pointer;
}

#characters {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.fm {
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  border: 1px solid #ccc;
  border-radius: 5px;
  background-color: #fff;
}

.fm:hover {
  background-color: #f0f0f0;
}

img.emoji {
  height: 1em;
  width: 1em;
  margin: 0 .05em 0 .1em;
  vertical-align: -0.1em;
}