:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #0f172a;
    --background-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-light: #64748b;
    --success-color: #10b981;
    --success-hover: #059669;
    --error-color: #ef4444;
    --border-color: #e2e8f0;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 0.5rem;
    --transition: all 0.3s ease;
}

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

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    line-height: 1.5;
}

.container {
    display: flex;
    flex-direction: column;
    gap: 24px;
    width: 100%;
    max-width: 700px;
}

.demo-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background-color: #f1f5f9;
    color: #64748b;
    padding: 10px;
    border-radius: var(--radius);
    font-weight: 500;
    font-size: 14px;
    border: 1px dashed #cbd5e1;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

form {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.form-header {
    text-align: center;
    margin-bottom: 24px;
}

.form-header h1 {
    color: var(--secondary-color);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-header p {
    color: var(--text-light);
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--secondary-color);
}

input, select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-color);
    background-color: var(--card-bg);
    transition: var(--transition);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%231e293b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

button {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

.download-button {
    background-color: var(--success-color);
    margin-top: 16px;
}

.download-button:hover {
    background-color: var(--success-hover);
}

.response-box {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    word-wrap: break-word;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 100px;
    transition: var(--transition);
}

.response-item {
    margin-bottom: 20px;
    width: 100%;
}

.response-item p {
    margin-bottom: 8px;
}

.response-item strong {
    color: var(--secondary-color);
}

.response-data {
    background-color: #f1f5f9;
    padding: 12px;
    border-radius: var(--radius);
    font-family: monospace;
    font-size: 12px;
    overflow-wrap: break-word;
    margin-bottom: 16px;
    text-align: left;
}

#log-messages {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    word-wrap: break-word;
    max-height: 300px;
    overflow-y: auto;
    transition: var(--transition);
}

#log-messages h3 {
    color: var(--secondary-color);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

#log-messages h3::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: var(--success-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

.log-entry {
    padding: 8px 12px;
    border-left: 3px solid var(--primary-color);
    background-color: #f1f5f9;
    margin-bottom: 8px;
    font-family: monospace;
    font-size: 12px;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.error-message {
    color: var(--error-color);
    background-color: rgba(239, 68, 68, 0.1);
    padding: 12px;
    border-radius: var(--radius);
    margin-top: 16px;
    font-size: 14px;
    text-align: left;
    border-left: 3px solid var(--error-color);
}

.spinner {
    display: none;
    width: 40px;
    height: 40px;
    border: 3px solid rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 16px;
}

.status-badge.connecting {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.status-badge.connected {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status-badge.disconnected {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    form, .response-box, #log-messages {
        padding: 20px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0f172a;
        --card-bg: #1e293b;
        --text-color: #f1f5f9;
        --text-light: #94a3b8;
        --secondary-color: #e2e8f0;
        --border-color: #334155;
    }
    
    .response-data, .log-entry {
        background-color: #334155;
    }
    
    .demo-indicator {
        background-color: #1e293b;
        color: #94a3b8;
        border-color: #475569;
    }
}