body {
    font-family: Arial, sans-serif;
    background-color: #f4f7f6;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    padding-top: 50px;
}

.container {
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    text-align: center;
}

h1 {
    margin-top: 0;
    color: #2c3e50;
}

p {
    color: #666;
}

.upload-zone {
    border: 2px dashed #bdc3c7;
    border-radius: 8px;
    padding: 40px 20px;
    background-color: #fafbfc;
    cursor: pointer;
    position: relative;
    margin-top: 20px;
}

.upload-zone:hover, .upload-zone.dragover {
    background-color: #f1f2f6;
    border-color: #3498db;
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    pointer-events: none;
}

.upload-content svg {
    color: #7f8c8d;
    margin-bottom: 10px;
}

#image-preview {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: #ecf0f1;
    border-radius: 6px;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 12px 20px;
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    margin-top: 20px;
}

button:hover:not(:disabled) {
    background-color: #2980b9;
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

.result-container {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.result-container.hidden {
    display: none;
}

.result-container h2 {
    font-size: 20px;
    margin-bottom: 10px;
}

.result-label {
    font-size: 24px;
    font-weight: bold;
    text-transform: capitalize;
    margin-top: 10px;
}

.result-label.no_tumor {
    color: #27ae60;
}

.result-label.tumor {
    color: #c0392b;
}

.error {
    color: #c0392b;
}

.demo-section {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: left;
}

.demo-section h3 {
    font-size: 16px;
    color: #333;
    margin-bottom: 15px;
}

.demo-images {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.demo-img-wrapper {
    display: inline-block;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 5px;
    text-decoration: none;
    text-align: center;
    background: #fff;
}

.demo-img-wrapper:hover {
    border-color: #3498db;
}

.demo-img-wrapper img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    display: block;
}

.demo-label {
    display: block;
    font-size: 12px;
    color: #666;
    margin-top: 5px;
}

.text-muted {
    color: #999;
    font-size: 13px;
    margin-top: 15px;
}