:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --secondary-color: #64748b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.chat-container {
    width: 100%;
    max-width: 800px;
    height: 90vh;
    max-height: 700px;
    background: var(--surface);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
.chat-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 20px 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    flex-shrink: 0;
}

.header-text h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    opacity: 0.9;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    background: var(--background);
    scroll-behavior: smooth;
}

.message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--primary-light);
}

.bot-message .message-avatar {
    background: var(--primary-color);
}

.user-message {
    flex-direction: row-reverse;
}

.user-message .message-avatar {
    background: var(--secondary-color);
}

.message-content {
    max-width: 70%;
    padding: 14px 18px;
    border-radius: 12px;
    line-height: 1.5;
}

.bot-message .message-content {
    background: var(--surface);
    border: 1px solid var(--border-color);
}

.user-message .message-content {
    background: var(--primary-color);
    color: white;
}

/* HTML Content Styling */
.message-content h2 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.user-message .message-content h2 {
    color: white;
}

.message-content h3 {
    font-size: 16px;
    margin: 16px 0 8px;
    color: var(--text-primary);
}

.user-message .message-content h3 {
    color: white;
}

.message-content p {
    margin-bottom: 10px;
}

.message-content ul,
.message-content ol {
    margin: 10px 0;
    padding-left: 24px;
}

.message-content li {
    margin-bottom: 6px;
}

.message-content strong {
    font-weight: 600;
    color: var(--primary-dark);
}

.user-message .message-content strong {
    color: white;
}

.message-content a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid var(--primary-light);
}

.message-content a:hover {
    border-bottom-color: var(--primary-color);
}

.user-message .message-content a {
    color: white;
    border-bottom-color: rgba(255, 255, 255, 0.5);
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 14px;
}

.message-content th,
.message-content td {
    padding: 10px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.message-content th {
    background: var(--primary-light);
    font-weight: 600;
    color: var(--primary-dark);
}

.message-content .precio {
    background: var(--primary-light);
    padding: 8px 12px;
    border-radius: 6px;
    display: inline-block;
    margin: 8px 0;
    font-weight: 600;
    color: var(--primary-dark);
}

.message-content code {
    background: var(--background);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    margin: 0 24px 12px;
    background: var(--surface);
    border-radius: 12px;
    width: fit-content;
    border: 1px solid var(--border-color);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--secondary-color);
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* Input Area */
.chat-input-container {
    background: var(--surface);
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

.chat-input-form {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

#messageInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    resize: none;
    max-height: 120px;
    transition: border-color 0.2s;
}

#messageInput:focus {
    outline: none;
    border-color: var(--primary-color);
}

#sendButton {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.1s;
    flex-shrink: 0;
}

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

#sendButton:active {
    transform: scale(0.95);
}

#sendButton:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.5;
}

.input-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
    text-align: center;
}

.input-hint kbd {
    background: var(--background);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    font-family: inherit;
    font-size: 11px;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 8px;
    padding: 12px 24px;
    background: var(--surface);
    border-top: 1px solid var(--border-color);
    overflow-x: auto;
}

.quick-action {
    padding: 8px 16px;
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.quick-action:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-dark);
}

/* Scrollbar */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 0;
    }

    .chat-container {
        height: 100vh;
        max-height: 100vh;
        border-radius: 0;
    }

    .message-content {
        max-width: 85%;
    }

    .quick-actions {
        padding: 8px 16px;
    }
}

/* Error message */
.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 12px 24px;
    font-size: 14px;
}