body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f4;
}

.container {
    max-width: 800px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
}

input[type="file"], button {
    display: block;
    margin-bottom: 20px;
}

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

button:disabled {
    background-color: #cccccc;
}

#status {
    margin-bottom: 20px;
    font-weight: bold;
}

#thumbnailContainer {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.thumbnail {
    width: 200px;
    text-align: center;
}

.thumbnail img {
    max-width: 100%;
    height: auto;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 5px;
}

.thumbnail p {
    margin-top: 5px;
    font-size: 0.9em;
    color: #666;
}

#timer {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 15px;
    color: #333;
}