/* Simple and minimalistic styling */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

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

header h1 {
    font-size: 2.5rem;
    font-weight: 300;
    color: #2c3e50;
    margin-bottom: 10px;
}

header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

main {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

section {
    background: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: #34495e;
    margin-bottom: 20px;
    border-bottom: 1px solid #ecf0f1;
    padding-bottom: 10px;
}

/* Status Section */
.status-card {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #e74c3c;
    transition: background-color 0.3s ease;
}

.status-dot.ready {
    background-color: #27ae60;
}

.status-dot.initializing {
    background-color: #f39c12;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

/* QR Code Section */
.qr-container {
    text-align: center;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 6px;
    margin-bottom: 15px;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-container img {
    max-width: 100%;
    height: auto;
}

/* Form Elements */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

.form-input, .form-textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-input:focus, .form-textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background-color: #3498db;
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background-color: #7f8c8d;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Response Section */
.response-card {
    background-color: #2c3e50;
    color: #ecf0f1;
    border-radius: 6px;
    padding: 20px;
}

#responseOutput {
    background-color: #34495e;
    padding: 15px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.4;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    min-height: 100px;
    margin-bottom: 15px;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #7f8c8d;
    border-top: 1px solid #ecf0f1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    section {
        padding: 20px;
    }
    
    .status-card {
        flex-direction: column;
        align-items: stretch;
    }
    
    .status-indicator {
        justify-content: center;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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