body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    box-sizing: border-box;
}

.container {
    background-color: #ffffff;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    text-align: center;
    max-width: 800px;
    width: 100%;
}

h1 {
    color: #1a1a1a;
    margin-bottom: 10px;
}

p {
    color: #666;
    margin-bottom: 30px;
}

/* 隱藏原始的 input file */
input[type="file"] {
    display: none;
}

/* 自訂按鈕樣式 */
.custom-file-upload {
    display: inline-block;
    padding: 12px 25px;
    cursor: pointer;
    background-color: #007bff;
    color: white;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.custom-file-upload:hover {
    background-color: #0056b3;
}

.status {
    margin-top: 20px;
    color: #007bff;
    font-weight: 500;
}

#result {
    margin-top: 30px;
    border-top: 1px solid #e0e0e0;
    padding-top: 30px;
}

#imagePreview {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: 8px;
    margin-bottom: 25px;
}

.download-button {
    display: inline-block;
    padding: 12px 25px;
    background-color: #28a745;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.download-button:hover {
    background-color: #218838;
}

.hidden {
    display: none;
}