/* Advanced Offline Chatbot Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #4facfe;
    --warning-color: #43e97b;
    --error-color: #fa709a;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #bdc3c7;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --border-color: #e9ecef;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 5px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 10px 40px rgba(0, 0, 0, 0.2);
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Main Chat Container */
.chat-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius-large);
    box-shadow: var(--shadow-heavy);
    width: 100%;
    max-width: 1000px;
    height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* Header Section */
.chat-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.bot-avatar {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    position: relative;
    z-index: 1;
}

.bot-icon {
    font-size: 28px;
    color: white;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.header-info {
    flex: 1;
    position: relative;
    z-index: 1;
}

.header-info h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-info p {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 400;
    margin-bottom: 8px;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    opacity: 0.8;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.3; }
}

.header-controls {
    display: flex;
    gap: 12px;
    position: relative;
    z-index: 1;
}

.control-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Chat Messages Area */
.chat-messages {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: var(--bg-secondary);
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

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

/* Message Styles */
.message {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    animation: slideInUp 0.4s ease-out;
    max-width: 80%;
}

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

.message.bot {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
    position: relative;
}

.message.user .message-avatar {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.message.bot .message-avatar {
    background: linear-gradient(135deg, var(--accent-color), var(--success-color));
    color: white;
}

.message-content {
    padding: 16px 20px;
    border-radius: 20px;
    position: relative;
    word-wrap: break-word;
    line-height: 1.5;
    box-shadow: var(--shadow-light);
    max-width: 100%;
}

.message.user .message-content {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-bottom-right-radius: 6px;
}

.message.bot .message-content {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 6px;
}

.message-time {
    font-size: 11px;
    opacity: 0.6;
    margin-top: 6px;
    text-align: right;
}

.message.user .message-time {
    text-align: left;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 16px 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    border-bottom-left-radius: 6px;
    max-width: 80%;
    align-self: flex-start;
    animation: slideInUp 0.4s ease-out;
    box-shadow: var(--shadow-light);
}

.typing-dot {
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

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

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.input-wrapper {
    display: flex;
    gap: 16px;
    align-items: center;
    margin-bottom: 16px;
}

.input-field {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    transition: var(--transition);
}

.input-field:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

#userInput {
    flex: 1;
    padding: 16px 20px;
    border: none;
    background: transparent;
    font-size: 16px;
    outline: none;
    font-family: inherit;
    color: var(--text-primary);
}

#userInput::placeholder {
    color: var(--text-light);
}

.input-actions {
    display: flex;
    gap: 8px;
    padding-right: 16px;
}

.action-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.send-btn {
    width: 56px;
    height: 56px;
    border: none;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 20px;
    box-shadow: var(--shadow-medium);
}

.send-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

.send-btn:active {
    transform: translateY(0);
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.quick-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    font-weight: 500;
}

.quick-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* Footer */
.chat-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-info {
    display: flex;
    gap: 20px;
}

.footer-actions {
    display: flex;
    gap: 12px;
}

.footer-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--bg-primary);
    margin: 5% auto;
    padding: 0;
    border-radius: var(--border-radius-large);
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-heavy);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    max-height: 60vh;
    overflow-y: auto;
}

.help-section, .about-section {
    margin-bottom: 24px;
}

.help-section h3, .about-section h3 {
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
}

.help-section ul, .about-section ul {
    list-style: none;
    padding-left: 0;
}

.help-section li, .about-section li {
    padding: 8px 0;
    border-bottom: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
}

.help-section li:last-child, .about-section li:last-child {
    border-bottom: none;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(10px);
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-tertiary);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

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

.loading-spinner p {
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .chat-container {
        height: 95vh;
        border-radius: var(--border-radius);
    }
    
    .chat-header {
        padding: 16px 20px;
        gap: 16px;
    }
    
    .bot-avatar {
        width: 50px;
        height: 50px;
    }
    
    .bot-icon {
        font-size: 24px;
    }
    
    .header-info h1 {
        font-size: 20px;
    }
    
    .header-info p {
        font-size: 13px;
    }
    
    .header-controls {
        gap: 8px;
    }
    
    .control-btn {
        width: 36px;
        height: 36px;
    }
    
    .chat-messages {
        padding: 16px;
        gap: 16px;
    }
    
    .message {
        max-width: 90%;
        gap: 12px;
    }
    
    .message-avatar {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .message-content {
        padding: 14px 18px;
        font-size: 15px;
    }
    
    .chat-input-container {
        padding: 16px 20px;
    }
    
    .input-wrapper {
        gap: 12px;
        margin-bottom: 12px;
    }
    
    #userInput {
        padding: 14px 18px;
        font-size: 15px;
    }
    
    .send-btn {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
    
    .quick-actions {
        gap: 8px;
    }
    
    .quick-btn {
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .chat-footer {
        padding: 12px 20px;
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .footer-info {
        justify-content: center;
    }
    
    .footer-actions {
        justify-content: center;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-header, .modal-body {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .chat-container {
        height: 100vh;
        border-radius: 0;
    }
    
    .chat-header {
        padding: 12px 16px;
    }
    
    .header-info h1 {
        font-size: 18px;
    }
    
    .message {
        max-width: 95%;
    }
    
    .message-content {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .quick-actions {
        justify-content: center;
    }
    
    .quick-btn {
        flex: 1;
        text-align: center;
        min-width: 80px;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
        --bg-secondary: #ffffff;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}