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

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

.container {
    max-width: 1200px;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 30px;
}

.app-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

.app-subtitle {
    color: #666;
    font-size: 1.1rem;
}

/* Persona Selector */
.persona-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.persona-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background: white;
    border-radius: 15px;
    border: 2px solid #e0e0e0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.persona-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-color: #667eea;
}

.persona-card.active {
    border-color: #667eea;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.persona-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    margin-right: 15px;
    flex-shrink: 0;
}

.persona-info h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
    color: #333;
}

.persona-info p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.persona-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 10px;
    background: #f0f0f0;
    border-radius: 15px;
    font-size: 0.8rem;
    color: #666;
}

/* Current Persona Display */
.current-persona {
    text-align: center;
    padding: 15px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 10px;
    margin-bottom: 20px;
    color: #667eea;
    font-weight: 500;
}

/* Chat Container */
.chat-container {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 20px;
    min-height: 500px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 20px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    min-height: 400px;
}

.welcome-message {
    text-align: center;
    padding: 40px 20px;
    color: #666;
}

.welcome-message h2 {
    color: #333;
    margin-bottom: 15px;
}

.message {
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

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

.message.user {
    display: flex;
    justify-content: flex-end;
}

.message.assistant {
    display: flex;
    justify-content: flex-start;
}

.message-content {
    max-width: 70%;
    padding: 12px 18px;
    border-radius: 15px;
    line-height: 1.5;
}

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

.message.assistant .message-content {
    background: #f0f0f0;
    color: #333;
}

.message-persona {
    font-size: 0.8rem;
    color: #999;
    margin-bottom: 5px;
    font-weight: 500;
}

/* Sample Questions */
.sample-questions {
    margin-bottom: 20px;
    padding: 15px;
    background: white;
    border-radius: 10px;
}

.sample-questions h4 {
    color: #666;
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.questions-grid {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.sample-question {
    padding: 8px 15px;
    background: #f0f0f0;
    border-radius: 20px;
    border: 1px solid #e0e0e0;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    color: #666;
}

.sample-question:hover {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-color: #667eea;
    color: #667eea;
}

/* Input Area */
.input-area {
    display: flex;
    gap: 10px;
}

#message-input {
    flex: 1;
    padding: 15px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

#message-input:focus {
    border-color: #667eea;
}

#message-input:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
}

#send-button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

#send-button:hover:not(:disabled) {
    transform: scale(1.05);
}

#send-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Loading Animation */
.loading {
    display: inline-flex;
    gap: 5px;
    padding: 15px 20px;
    background: #f0f0f0;
    border-radius: 15px;
}

.loading span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #667eea;
    animation: bounce 1.4s infinite ease-in-out both;
}

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

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

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* View Samples Button */
.view-samples-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: transform 0.2s ease;
}

.view-samples-btn:hover {
    transform: translateY(-2px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close-modal {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 2rem;
    cursor: pointer;
    color: #999;
    transition: color 0.2s ease;
}

.close-modal:hover {
    color: #333;
}

.sample-conversation {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
}

.sample-conversation h4 {
    color: #667eea;
    margin-bottom: 10px;
}

.sample-user {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 10px 15px;
    border-radius: 10px;
    margin-bottom: 10px;
}

.sample-assistant {
    background: white;
    padding: 10px 15px;
    border-radius: 10px;
    white-space: pre-wrap;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }
    
    .app-title {
        font-size: 2rem;
    }
    
    .persona-selector {
        grid-template-columns: 1fr;
    }
    
    .message-content {
        max-width: 85%;
    }
    
    .view-samples-btn {
        bottom: 20px;
        right: 20px;
    }
}