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

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

.container {
    max-width: 900px;
    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, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.tagline {
    font-size: 1.1em;
    opacity: 0.9;
}

.language-selector {
    padding: 20px 30px;
    background: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.language-selector label {
    font-weight: 600;
    color: #333;
}

.language-selector select {
    padding: 8px 15px;
    border: 2px solid #667eea;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    background: white;
}

.chat-container {
    height: 500px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px 30px;
    background: #f8f9fa;
}

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

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

.message-content {
    padding: 15px 20px;
    border-radius: 15px;
    max-width: 80%;
}

.bot-message .message-content {
    background: white;
    border: 2px solid #667eea;
    margin-right: auto;
}

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

.message-content strong {
    display: block;
    margin-bottom: 8px;
    color: #667eea;
}

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

.message-content p {
    margin: 8px 0;
    line-height: 1.6;
}

.message-content ul {
    margin: 10px 0;
    padding-left: 20px;
}

.message-content li {
    margin: 5px 0;
    line-height: 1.6;
}

.message-content a {
    color: #667eea;
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.3s;
}

.message-content a:hover {
    color: #764ba2;
    text-decoration: none;
}

.user-message .message-content a {
    color: white;
    text-decoration: underline;
}

.user-message .message-content a:hover {
    color: #f0f0f0;
}

.chat-input-container {
    padding: 20px 30px;
    background: white;
    border-top: 1px solid #e0e0e0;
    display: flex;
    gap: 10px;
}

#userInput {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1em;
    font-family: inherit;
    resize: none;
    transition: border-color 0.3s;
}

#userInput:focus {
    outline: none;
    border-color: #667eea;
}

#sendButton {
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
    min-width: 100px;
}

#sendButton:hover {
    transform: translateY(-2px);
}

#sendButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.loader {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.quick-questions {
    padding: 20px 30px;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
}

.quick-questions p {
    margin-bottom: 10px;
    color: #666;
}

.quick-btn {
    margin: 5px;
    padding: 10px 15px;
    background: white;
    border: 2px solid #667eea;
    color: #667eea;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s;
}

.quick-btn:hover {
    background: #667eea;
    color: white;
}

@media (max-width: 768px) {
    .container {
        border-radius: 0;
    }
    
    header h1 {
        font-size: 1.8em;
    }
    
    .chat-container {
        height: 400px;
    }
    
    .message-content {
        max-width: 90%;
    }
}