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

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #333;
    text-align: center;
}

.upload-section {
    margin-bottom: 20px;
    padding: 15px;
    background-color: #f0f8ff;
    border-radius: 5px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#loading {
    color: #4CAF50;
    font-weight: bold;
}

.curve-controls {
    margin-bottom: 30px;
}

.curve-editor-container {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

#curveCanvas {
    border: 1px solid #ddd;
    background-color: #fff;
    cursor: crosshair;
}

.curve-presets {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.curve-presets button {
    padding: 8px 12px;
    background-color: #e0e0e0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.curve-presets button:hover {
    background-color: #d0d0d0;
}

.channel-controls {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.channel {
    padding: 15px;
    border-radius: 5px;
    background-color: #f9f9f9;
}

.channel h3 {
    margin-top: 0;
    cursor: pointer;
    padding: 5px;
    border-radius: 3px;
}

.channel h3:hover {
    background-color: #eee;
}

.channel:nth-child(1) h3 {
    color: #f00;
}

.channel:nth-child(2) h3 {
    color: #0f0;
}

.channel:nth-child(3) h3 {
    color: #00f;
}

.channel:nth-child(4) h3 {
    color: #ff0;
}

.sliders {
    margin-top: 10px;
}

.slider-container {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.slider-container label {
    width: 80px;
    font-size: 14px;
}

.slider {
    flex-grow: 1;
    margin: 0 10px;
}

.slider-value {
    width: 40px;
    text-align: right;
    font-family: monospace;
}

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

.image-container {
    flex: 1;
    text-align: center;
}

.image-container img {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 15px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

input[type="file"] {
    margin-bottom: 10px;
}
/* 以前のスタイルに追加 */
canvas {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    background-color: #f8f8f8;
}

.image-comparison {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.image-container {
    flex: 1;
    min-width: 300px;
}