body {
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f5f5f5;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
}

.editor-area {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.control-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  padding: 15px;
  background-color: #f9f9f9;
  border-radius: 5px;
}

.control-group {
  display: flex;
  flex-direction: column;
  margin-right: 20px;
}

.control-group label {
  margin-bottom: 5px;
  font-weight: bold;
  font-size: 14px;
}

.control-group input[type="range"] {
  width: 100%;
  min-width: 150px;
}

.button-group {
  display: flex;
  gap: 10px;
  align-items: center;
}

.canvas-container {
  position: relative;
  overflow: hidden;
  width: 100%;
  background-color: #eee;
  margin: 0 auto;
  border: 1px solid #ddd;
  max-width: 100%;
  min-height: 300px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.canvas-container.drag-over {
  background-color: #e0f0ff;
  border: 2px dashed #4285f4;
}

.canvas-container .dropzone-message {
  display: none;
  text-align: center;
  color: #666;
  padding: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
}

.canvas-container.empty .dropzone-message {
  display: block;
}

.hidden-input {
  display: none;
}

#imageCanvas {
  display: block;
  max-width: 100%;
  height: auto;
}

#textOverlay {
  position: absolute;
  top: 20px;
  left: 20px;
  cursor: move;
  padding: 5px;
  border: 1px dashed transparent;
  user-select: none;
  color: white;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

#textOverlay:hover {
  border: 1px dashed #aaa;
}

.resizer {
  position: absolute;
  width: 10px;
  height: 10px;
  background-color: white;
  border: 1px solid #999;
  border-radius: 50%;
}

.resizer.ne {
  top: -5px;
  right: -5px;
  cursor: ne-resize;
}

.resizer.se {
  bottom: -5px;
  right: -5px;
  cursor: se-resize;
}

.resizer.sw {
  bottom: -5px;
  left: -5px;
  cursor: sw-resize;
}

.resizer.nw {
  top: -5px;
  left: -5px;
  cursor: nw-resize;
}

button {
  padding: 8px 16px;
  background-color: #4285f4;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: background-color 0.2s;
}

button:hover {
  background-color: #3367d6;
}

#clearButton {
  background-color: #f44336;
}

#clearButton:hover {
  background-color: #d32f2f;
}

input, select {
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 14px;
}

.file-input-container {
  position: relative;
  overflow: hidden;
  display: inline-block;
}

.file-input-container input[type=file] {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.download-area {
  margin-top: 20px;
  text-align: center;
}

/* 色選択用のスタイル */
.color-picker {
  display: flex;
  align-items: center;
  gap: 10px;
}

.color-preview {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid #ddd;
}

.instructions {
  margin-top: 15px;
  padding: 10px;
  background-color: #f0f8ff;
  border-left: 4px solid #4285f4;
  font-size: 14px;
}