/* ============================================
   MOBILE APP-STYLE FEATURES
   ============================================ */

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.5);
}

.back-to-top svg {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* AI Chat Widget */
.ai-chat-widget {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.chat-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    color: white;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.chat-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(102, 126, 234, 0.6);
}

.chat-toggle .close-icon {
    display: none;
}

.chat-toggle.active .chat-icon {
    display: none;
}

.chat-toggle.active .close-icon {
    display: block;
}

/* Pulse animation */
.chat-toggle::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    opacity: 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.1);
        opacity: 0;
    }
    100% {
        transform: scale(1);
        opacity: 0;
    }
}

/* Chat Window */
.chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    max-width: calc(100vw - 40px);
    height: 600px;
    max-height: calc(100vh - 120px);
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

.chat-window.active {
    display: flex;
}

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

/* Chat Header */
.chat-header {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.chat-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
}

.chat-status {
    font-size: 0.75rem;
    opacity: 0.9;
}

.chat-status::before {
    content: '●';
    color: #10b981;
    margin-right: 4px;
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: #f8f9fa;
}

.chat-message {
    margin-bottom: 16px;
    animation: fadeIn 0.3s ease;
}

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

.chat-message.bot .message-content {
    background: white;
    color: #333;
    border-radius: 18px 18px 18px 4px;
    padding: 12px 16px;
    max-width: 85%;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.chat-message.user .message-content {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 18px 18px 4px 18px;
    padding: 12px 16px;
    max-width: 85%;
    margin-left: auto;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

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

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

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

.message-content ul {
    margin: 8px 0;
    padding-left: 20px;
}

.message-content li {
    margin: 4px 0;
}

/* Chat Input */
.chat-input {
    display: flex;
    gap: 8px;
    padding: 16px;
    background: white;
    border-top: 1px solid #e5e7eb;
}

#chatInputField {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 25px;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.3s ease;
}

#chatInputField:focus {
    border-color: #667eea;
}

#chatSend {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

#chatSend:hover {
    transform: scale(1.1);
}

#chatSend:active {
    transform: scale(0.95);
}

/* Quick Actions */
.chat-quick-actions {
    display: flex;
    gap: 8px;
    padding: 0 16px 16px;
    flex-wrap: wrap;
    background: white;
}

.quick-action {
    padding: 8px 16px;
    background: #f0f0f0;
    border: none;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-action:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 90px;
        right: 15px;
    }
    
    .chat-toggle {
        width: 55px;
        height: 55px;
    }
    
    .chat-window {
        width: calc(100vw - 20px);
        height: calc(100vh - 100px);
        bottom: 75px;
        right: 10px;
        border-radius: 16px;
    }
    
    .chat-messages {
        padding: 15px;
    }
    
    .chat-input {
        padding: 12px;
    }
    
    .chat-quick-actions {
        padding: 0 12px 12px;
    }
}

/* Scrollbar Styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

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

.chat-messages::-webkit-scrollbar-thumb {
    background: #667eea;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #764ba2;
}

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

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: #999;
    border-radius: 50%;
    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;
    }
}