/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    height: 100vh;
    overflow: hidden;
}

/* Chat container */
.chat-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* Header */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-left h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    opacity: 0.9;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #fbbf24;
    animation: pulse 2s infinite;
}

.status-indicator.connected {
    background-color: #10b981;
    animation: none;
}

.status-indicator.disconnected {
    background-color: #ef4444;
    animation: none;
}

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

.language-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-selector label {
    font-size: 0.875rem;
    font-weight: 500;
}

.language-dropdown {
    padding: 0.5rem 0.75rem;
    border: none;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s;
}

.language-dropdown:hover {
    background: rgba(255, 255, 255, 0.3);
}

.language-dropdown option {
    background: #333;
    color: white;
}

/* Messages area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scroll-behavior: smooth;
}

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

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Messages */
.message {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
}

.user-message {
    align-items: flex-end;
}

.assistant-message {
    align-items: flex-start;
}

.message-content {
    max-width: 80%;
    padding: 1rem 1.25rem;
    border-radius: 18px;
    line-height: 1.5;
    word-wrap: break-word;
}

.user-message .message-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom-right-radius: 6px;
}

.assistant-message .message-content {
    background: #f8f9fa;
    color: #333;
    border: 1px solid #e9ecef;
    border-bottom-left-radius: 6px;
}

.message-timestamp {
    font-size: 0.75rem;
    color: #6b7280;
    margin-top: 0.25rem;
    padding: 0 0.5rem;
}

/* Welcome message */
.welcome-message .message-content {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    border: none;
}

.welcome-message ul {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.welcome-message li {
    margin-bottom: 0.25rem;
}

/* Code blocks */
.message-content pre {
    background: #2d3748;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 8px;
    margin: 0.5rem 0;
    overflow-x: auto;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.4;
    position: relative;
    cursor: pointer;
    transition: background-color 0.2s;
}

.message-content pre:hover {
    background: #4a5568;
}

.message-content pre::after {
    content: 'Click to copy';
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
}

.message-content pre:hover::after {
    opacity: 1;
}

.message-content code {
    background: rgba(0, 0, 0, 0.1);
    padding: 0.125rem 0.25rem;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
}

.message-content pre code {
    background: none;
    padding: 0;
}

/* Typing indicator */
.typing-indicator {
    padding: 0 1rem;
}

.typing-animation {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin-right: 0.5rem;
}

.typing-animation span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #6b7280;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-animation span:nth-child(1) { animation-delay: -0.32s; }
.typing-animation span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.typing-text {
    font-style: italic;
    color: #6b7280;
    font-size: 0.875rem;
}

/* Input area */
.chat-input-container {
    border-top: 1px solid #e5e7eb;
    background: white;
    padding: 1rem 1.5rem;
}

.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.error-close {
    background: none;
    border: none;
    color: #dc2626;
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 0.75rem;
    background: #f9fafb;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 0.75rem;
    transition: border-color 0.2s;
}

.chat-input-wrapper:focus-within {
    border-color: #667eea;
}

.message-input {
    flex: 1;
    border: none;
    background: none;
    resize: none;
    outline: none;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    min-height: 24px;
    max-height: 120px;
    overflow-y: auto;
}

.message-input::placeholder {
    color: #9ca3af;
}

.send-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.send-button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.send-button:disabled {
    background: #d1d5db;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: #6b7280;
}

.character-count {
    font-weight: 500;
}

.character-count.warning {
    color: #f59e0b;
}

.character-count.error {
    color: #dc2626;
}

/* Responsive design */
@media (max-width: 768px) {
    .chat-header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .header-left,
    .header-right {
        width: 100%;
    }
    
    .header-right {
        display: flex;
        justify-content: center;
    }
    
    .message-content {
        max-width: 90%;
    }
    
    .chat-input-container {
        padding: 1rem;
    }
    
    .input-footer {
        flex-direction: column;
        gap: 0.25rem;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .chat-header h1 {
        font-size: 1.25rem;
    }
    
    .message-content {
        max-width: 95%;
        padding: 0.875rem 1rem;
    }
    
    .chat-input-wrapper {
        padding: 0.5rem;
    }
    
    .send-button {
        width: 36px;
        height: 36px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1f2937;
        color: #f9fafb;
    }
    
    .chat-container {
        background: #111827;
    }
    
    .assistant-message .message-content {
        background: #374151;
        color: #f9fafb;
        border-color: #4b5563;
    }
    
    .chat-input-container {
        background: #111827;
        border-color: #374151;
    }
    
    .chat-input-wrapper {
        background: #1f2937;
        border-color: #4b5563;
    }
    
    .message-input::placeholder {
        color: #6b7280;
    }
    
    .error-message {
        background: #1f2937;
        border-color: #dc2626;
        color: #fca5a5;
    }
}

/* Loading animation for streaming responses */
.streaming-response {
    position: relative;
}

.streaming-response::after {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: blink 1s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Notification toast */
.notification-toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #10b981;
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
}

.notification-toast.error {
    background: #dc2626;
}

.notification-toast.warning {
    background: #f59e0b;
}

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