* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

.app {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.app-header {
    text-align: center;
    margin-bottom: 30px;
}

.app-header h1 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.upload-container {
    margin-bottom: 20px;
}

.upload-label {
    display: block;
    cursor: pointer;
}

.upload-placeholder {
    border: 2px dashed #ccc;
    border-radius: 8px;
    padding: 60px;
    text-align: center;
    color: #777;
    transition: all 0.3s ease;
}

.upload-placeholder:hover {
    border-color: #4CAF50;
    color: #4CAF50;
}

.image-preview {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    display: block;
    margin: 0 auto;
}

.file-input {
    display: none;
}

.submit-button {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    margin-bottom: 20px;
    transition: background-color 0.3s;
}

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

.submit-button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

.error-message {
    color: #e74c3c;
    margin-bottom: 20px;
    padding: 10px;
    background-color: #fadbd8;
    border-radius: 4px;
}

.result-container {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.result-container h2 {
    margin-bottom: 15px;
    color: #2c3e50;
}

.result-message {
    margin-bottom: 15px;
}

.membership-status {
    font-size: 18px;
    margin-bottom: 15px;
}

.probability-bar {
    height: 24px;
    background-color: #e0e0e0;
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    margin-top: 15px;
}

.probability-fill {
    height: 100%;
    background-color: #4CAF50;
    transition: width 0.3s ease;
    width: 0%;
}

.probability-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: black;
    font-weight: bold;
}

.loading {
    text-align: center;
    margin: 20px 0;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4CAF50;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none;
}