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

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-user: #eff6ff;
    --bg-assistant: #f9fafb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
}

.chat-container {
    max-width: 900px;
    margin: 0 auto;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.chat-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h1 {
    font-size: 20px;
    font-weight: 600;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.status-indicator .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
}

.status-indicator.processing .dot {
    background: var(--warning);
    animation: pulse 1.5s ease-in-out infinite;
}

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

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

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

.message-content {
    max-width: 80%;
    padding: 12px 16px;
    border-radius: 12px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.message.user .message-content {
    background: var(--bg-user);
    border: 1px solid #dbeafe;
}

.message.assistant .message-content {
    background: var(--bg-assistant);
    border: 1px solid var(--border);
}

.message-content p {
    margin: 8px 0;
}

.message-content p:first-child {
    margin-top: 0;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.campaign-summary {
    background: #f0f9ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 16px;
    margin: 12px 0;
}

.campaign-summary h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.campaign-summary .field {
    display: flex;
    padding: 6px 0;
    font-size: 14px;
}

.campaign-summary .field-label {
    font-weight: 500;
    min-width: 100px;
    color: var(--text-secondary);
}

.campaign-summary .field-value {
    color: var(--text-primary);
}

.quick-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.quick-action-btn {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-primary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.quick-action-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
}

.quick-action-btn.primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.quick-action-btn.primary:hover {
    background: var(--primary-hover);
}

.chat-input-container {
    border-top: 1px solid var(--border);
    padding: 16px 24px;
    background: var(--bg-primary);
}

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

#messageInput {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    resize: none;
    max-height: 200px;
}

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

.send-btn {
    padding: 12px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.send-btn:hover {
    background: var(--primary-hover);
}

.send-btn:disabled {
    background: var(--bg-secondary);
    cursor: not-allowed;
}

.file-upload-area {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.upload-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.upload-btn:hover {
    background: var(--border);
}

.upload-hint {
    font-size: 12px;
    color: var(--text-secondary);
}

.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-secondary);
    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);
        opacity: 0.7;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .chat-container {
        max-width: 100%;
        height: 100vh;
    }
    
    .message-content {
        max-width: 90%;
    }
    
    .chat-header {
        padding: 16px;
    }
    
    .chat-messages {
        padding: 16px;
    }
}