/* Modern AI Chatbot UI with Enhanced Glassmorphism */
* {
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

/* Enhanced animated background particles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 60% 60%, rgba(255, 182, 193, 0.2) 0%, transparent 50%);
    animation: backgroundShift 25s ease-in-out infinite;
    z-index: -1;
}

/* Floating particles */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255,255,255,0.4), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255,255,255,0.3), transparent),
        radial-gradient(2px 2px at 160px 30px, rgba(255,255,255,0.2), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: float 20s linear infinite;
    z-index: -1;
}

@keyframes backgroundShift {
    0%, 100% { 
        transform: translate(0, 0) scale(1) rotate(0deg);
        opacity: 0.8;
    }
    25% { 
        transform: translate(-15px, -15px) scale(1.1) rotate(1deg);
        opacity: 1;
    }
    50% { 
        transform: translate(15px, -10px) scale(0.9) rotate(-1deg);
        opacity: 0.9;
    }
    75% { 
        transform: translate(-10px, 15px) scale(1.05) rotate(0.5deg);
        opacity: 1;
    }
}

@keyframes float {
    0% { transform: translateY(0px) rotate(0deg); }
    100% { transform: translateY(-100px) rotate(360deg); }
}

.chatbot-container {
    width: 520px;
    border-radius: 32px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 
        0 32px 64px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(255, 255, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3),
        0 8px 32px rgba(102, 126, 234, 0.1);
    display: flex;
    flex-direction: column;
    font-family: 'Inter', sans-serif;
    overflow: hidden;
    position: relative;
    animation: slideInUp 1s cubic-bezier(0.16, 1, 0.3, 1);
    transform-style: preserve-3d;
}

.chatbot-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    border-radius: 32px;
    pointer-events: none;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(60px) scale(0.9) rotateX(15deg);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0deg);
    }
}

.chatbot-header {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 28px 32px 24px 32px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.chatbot-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(45deg, rgba(255,255,255,0.15) 0%, rgba(255,255,255,0) 50%),
        radial-gradient(circle at 30% 20%, rgba(255,255,255,0.25) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.chatbot-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.4) 50%, transparent 100%);
}

.chat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: gentlePulse 4s ease-in-out infinite;
    position: relative;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.chat-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.4) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    animation: ripple 3s ease-out infinite;
}

@keyframes gentlePulse {
    0%, 100% { 
        transform: scale(1) rotate(0deg);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1), 0 0 0 0 rgba(255, 255, 255, 0.4);
    }
    50% { 
        transform: scale(1.08) rotate(3deg);
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15), 0 0 0 12px rgba(255, 255, 255, 0);
    }
}

@keyframes ripple {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(2.5);
        opacity: 0;
    }
}

.chat-icon svg {
    width: 28px;
    height: 28px;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.15));
    z-index: 1;
    position: relative;
}

.chatbot-title {
    font-family: 'Inter', sans-serif;
    font-size: 26px;
    font-weight: 700;
    color: #fff;
    text-shadow: 0 4px 12px rgba(0,0,0,0.15);
    letter-spacing: -0.8px;
    position: relative;
}

.chatbot-title::after {
    content: '●';
    color: #4ade80;
    font-size: 14px;
    margin-left: 10px;
    animation: statusPulse 2.5s ease-in-out infinite;
    text-shadow: 0 0 8px rgba(74, 222, 128, 0.6);
}

@keyframes statusPulse {
    0%, 100% { 
        opacity: 0.6;
        transform: scale(1);
    }
    50% { 
        opacity: 1;
        transform: scale(1.2);
    }
}

.chat-display {
    height: 560px;
    overflow-y: auto;
    padding: 32px 28px 28px 28px;
    background: linear-gradient(180deg, rgba(248, 250, 252, 0.9) 0%, rgba(241, 245, 249, 0.7) 100%);
    display: flex;
    flex-direction: column;
    gap: 24px;
    scroll-behavior: smooth;
    position: relative;
}

.chat-display::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: linear-gradient(180deg, rgba(255,255,255,0.9) 0%, transparent 100%);
    pointer-events: none;
    z-index: 1;
}

.chat-display::-webkit-scrollbar {
    width: 10px;
}

.chat-display::-webkit-scrollbar-track {
    background: transparent;
}

.chat-display::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.4) 0%, rgba(118, 75, 162, 0.4) 100%);
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.chat-display::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, rgba(102, 126, 234, 0.6) 0%, rgba(118, 75, 162, 0.6) 100%);
}

.msg-row {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    margin-bottom: 0;
    animation: messageSlideIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.msg-row.user {
    flex-direction: row-reverse;
}

.msg-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.msg-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 50%);
    border-radius: 50%;
    transform: scale(0);
    transition: transform 0.3s ease;
}

.msg-icon:hover::before {
    transform: scale(1);
}

.msg-icon.bot {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

.message {
    max-width: 75%;
    padding: 18px 24px;
    border-radius: 24px;
    font-size: 16px;
    line-height: 1.5;
    position: relative;
    word-wrap: break-word;
    transition: all 0.3s ease;
    box-shadow: 
        0 4px 16px rgba(0, 0, 0, 0.08),
        0 0 0 1px rgba(255, 255, 255, 0.8);
}

.message:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 24px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(255, 255, 255, 0.9);
}

.message.user {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-left: auto;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.message.bot {
    background: rgba(255, 255, 255, 0.95);
    color: #1f2937;
    border: 1px solid rgba(226, 232, 240, 0.8);
    backdrop-filter: blur(10px);
}

.input-area {
    padding: 28px 32px 32px 32px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%);
    border-top: 1px solid rgba(226, 232, 240, 0.6);
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
}

.input-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(102, 126, 234, 0.3) 50%, transparent 100%);
}

#user-input {
    flex: 1;
    padding: 18px 28px;
    border: 2px solid rgba(226, 232, 240, 0.8);
    border-radius: 32px;
    font-size: 16px;
    outline: none;
    background: rgba(248, 250, 252, 0.9);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    font-family: inherit;
    color: #1f2937;
    backdrop-filter: blur(15px);
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

#user-input:focus {
    border: 2px solid #667eea;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 
        0 0 0 6px rgba(102, 126, 234, 0.1),
        0 8px 24px rgba(0, 0, 0, 0.12);
    transform: scale(1.02);
}

#user-input::placeholder {
    color: #9ca3af;
    font-style: italic;
    opacity: 0.8;
}

#send-btn, #reset-btn {
    padding: 0;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    font-weight: 600;
    cursor: pointer;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(15px);
    box-shadow: 
        0 6px 20px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.3);
}

#send-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

#reset-btn {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: #fff;
    margin-left: 8px;
}

#send-btn::before, #reset-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
}

#send-btn:hover::before, #reset-btn:hover::before {
    left: 100%;
}

#send-btn:hover, #send-btn:active {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    box-shadow: 
        0 10px 30px rgba(102, 126, 234, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    transform: translateY(-4px) scale(1.08);
}

#reset-btn:hover, #reset-btn:active {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    box-shadow: 
        0 10px 30px rgba(239, 68, 68, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.4);
    transform: translateY(-4px) scale(1.08);
}

#send-btn:active, #reset-btn:active {
    transform: translateY(-2px) scale(0.98);
}

#send-btn svg, #reset-btn svg {
    filter: drop-shadow(0 3px 6px rgba(0,0,0,0.15));
    transition: transform 0.3s ease;
    z-index: 1;
    position: relative;
}

#send-btn:hover svg {
    transform: scale(1.15) translateX(2px);
}

#reset-btn:hover svg {
    transform: rotate(180deg) scale(1.15);
}

/* Enhanced typing indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 28px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 
        0 6px 24px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.9);
    max-width: 100px;
    margin-left: 60px;
    backdrop-filter: blur(15px);
}

.typing-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    animation: typing 1.6s infinite ease-in-out;
    box-shadow: 0 3px 8px rgba(102, 126, 234, 0.4);
}

.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(1.2);
        opacity: 1;
    }
}

/* Responsive design */
@media (max-width: 520px) {
    .chatbot-container {
        width: 100vw;
        min-width: 0;
        border-radius: 0;
        margin: 0;
    }
    
    .chat-display {
        height: 60vh;
        padding: 12px 6px 6px 6px;
    }
    
    .message {
        max-width: 95%;
        padding: 10px 14px;
        font-size: 15px;
    }
    
    .input-area {
        padding: 10px 6px 10px 6px;
        gap: 6px;
    }
    
    #user-input {
        padding: 10px 14px;
        font-size: 15px;
        max-width: 60vw;
    }
    
    #send-btn, #reset-btn, #dashboard-btn {
        width: 44px;
        height: 44px;
    }
    
    .chatbot-header {
        padding: 14px 10px 10px 10px;
    }
    
    .chatbot-title {
        font-size: 20px;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .chatbot-container {
        background: rgba(17, 24, 39, 0.95);
        border: 1px solid rgba(55, 65, 81, 0.4);
    }
    
    .chat-display {
        background: linear-gradient(180deg, rgba(31, 41, 55, 0.9) 0%, rgba(17, 24, 39, 0.7) 100%);
    }
    
    .message.bot {
        background: rgba(55, 65, 81, 0.95);
        color: #f9fafb;
        border: 1px solid rgba(75, 85, 99, 0.8);
    }
    
    .input-area {
        background: rgba(17, 24, 39, 0.95);
        border-top: 1px solid rgba(55, 65, 81, 0.8);
    }
    
    #user-input {
        background: rgba(31, 41, 55, 0.9);
        color: #f9fafb;
        border: 2px solid rgba(75, 85, 99, 0.8);
    }
    
    #user-input::placeholder {
        color: #9ca3af;
    }
    
    .typing-indicator {
        background: rgba(31, 41, 55, 0.95);
        border: 1px solid rgba(75, 85, 99, 0.8);
    }
}