:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --gray: #6b7280;
    --light: #f9fafb;
    --border: #e5e7eb;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255,255,255,0.2);
    padding: 8px 20px;
    border-radius: 20px;
}

.status-indicator {
    width: 10px;
    height: 10px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

main {
    padding: 30px;
}

.row {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.col {
    flex: 1;
}

.card {
    background: var(--light);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    border: 1px solid var(--border);
}

.card h3 {
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.webhook-url, .api-key {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.webhook-url input, .api-key input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    background: white;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 15px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

button:hover {
    background: var(--primary-dark);
}

.help-text {
    color: var(--gray);
    font-size: 14px;
    margin-top: 10px;
}

.message-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.message {
    background: white;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 10px;
    border-left: 4px solid var(--primary);
}

.message.sent {
    border-left-color: var(--success);
}

.message-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
}

.user {
    font-weight: bold;
    color: var(--primary);
}

.time {
    color: var(--gray);
}

.message-body {
    color: #333;
    line-height: 1.5;
}

.empty {
    text-align: center;
    color: var(--gray);
    padding: 40px 20px;
    font-style: italic;
}

.btn-clear {
    background: var(--danger);
}

.btn-clear:hover {
    background: #dc2626;
}

.test-section {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.test-section input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
}

.btn-primary {
    background: var(--primary);
    font-size: 16px;
}

.test-result {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 2px dashed var(--border);
    min-height: 60px;
}

.bot-response {
    color: var(--success);
    font-weight: 500;
}

.loading {
    color: var(--gray);
    text-align: center;
    padding: 10px;
}

.error {
    color: var(--danger);
}

.links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    text-decoration: none;
    padding: 10px 20px;
    border: 2px solid var(--primary);
    border-radius: 8px;
    font-weight: 500;
}

.btn-link:hover {
    background: var(--primary);
    color: white;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--gray);
    border-top: 1px solid var(--border);
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 8px;
    color: white;
    font-weight: bold;
    animation: slideIn 0.3s ease;
}

.notification.success {
    background: var(--success);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .row {
        flex-direction: column;
    }
    
    .webhook-url, .api-key {
        flex-direction: column;
    }
    
    button {
        width: 100%;
        justify-content: center;
    }
}