/* =========================
   PORTFOLIO CHATBOT STYLES
   ========================= */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    font-size: 16px;
    line-height: 1.5;
    transition: background 0.3s ease;
}

/* Main Container */
.chat-container {
    width: 100%;
    max-width: 900px;
    height: 90vh;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.15),
        0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    margin: 20px;
    animation: slideIn 0.8s ease-out;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: background 0.3s ease, border 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Header Styles */
.chat-header {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 25px 30px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: background 0.3s ease;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 2px,
        rgba(255, 255, 255, 0.08) 2px,
        rgba(255, 255, 255, 0.08) 4px
    );
    animation: shimmer 4s linear infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%); }
    100% { transform: translateX(100%) translateY(100%); }
}

.chat-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.chat-header h1 i {
    margin-right: 12px;
    color: rgba(255, 255, 255, 0.9);
}

.chat-header p {
    opacity: 0.9;
    font-size: 1.1rem;
    position: relative;
    z-index: 2;
    font-weight: 400;
}

/* Theme Controls */
.theme-controls {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 10px;
    z-index: 10;
}

.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.theme-btn:hover {
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.3);
}

.theme-btn.active {
    background: rgba(255, 255, 255, 0.4);
    border-color: white;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 10px;
    padding: 0 30px 15px;
    flex-wrap: wrap;
    transition: opacity 0.3s ease;
}

.action-btn {
    padding: 10px 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.action-btn.youtube {
    background: linear-gradient(135deg, #FF0000, #CC0000);
    box-shadow: 0 4px 12px rgba(255, 0, 0, 0.3);
}

.action-btn.youtube:hover {
    box-shadow: 0 6px 20px rgba(255, 0, 0, 0.4);
}

/* Quick Reply Suggestions */
.quick-replies {
    display: flex;
    gap: 10px;
    padding: 15px 30px 0;
    flex-wrap: wrap;
    animation: slideUp 0.5s ease-out;
}

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

.quick-reply-btn {
    padding: 10px 18px;
    background: white;
    border: 2px solid #4facfe;
    border-radius: 20px;
    color: #4facfe;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(79, 172, 254, 0.2);
}

.quick-reply-btn:hover {
    background: #4facfe;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3);
}

.quick-reply-btn i {
    margin-right: 6px;
}

/* Messages Container */
.chat-messages {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background: linear-gradient(to bottom, #f8fafc, #e2e8f0);
    position: relative;
    transition: background 0.3s ease;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(241, 245, 249, 0.5);
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #cbd5e1, #94a3b8);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #94a3b8, #64748b);
}

/* Message Styles */
.message {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    animation: messageSlide 0.5s ease-out;
    max-width: 100%;
}

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

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

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

/* Avatar Styles */
.message-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    flex-shrink: 0;
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.15),
        0 2px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
}

.message-avatar:hover {
    transform: scale(1.05);
}

.message.user .message-avatar {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
}

.message.bot .message-avatar {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    position: relative;
}

.message.bot .message-avatar.typing {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3);
    }
    50% { 
        transform: scale(1.1);
        box-shadow: 0 6px 20px rgba(79, 172, 254, 0.5);
    }
}

/* Message Content */
.message-content {
    max-width: 75%;
    padding: 18px 22px;
    border-radius: 20px;
    position: relative;
    line-height: 1.6;
    font-size: 1rem;
    box-shadow: 
        0 4px 12px rgba(0, 0, 0, 0.1),
        0 2px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.message-content:hover {
    transform: translateY(-1px);
    box-shadow: 
        0 6px 16px rgba(0, 0, 0, 0.12),
        0 3px 8px rgba(0, 0, 0, 0.08);
}

.message.user .message-content {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-bottom-right-radius: 5px;
}

.message.bot .message-content {
    background: white;
    color: #2d3748;
    border-bottom-left-radius: 5px;
    border: 1px solid rgba(226, 232, 240, 0.8);
}

/* Typing Indicator */
.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 0;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: #4facfe;
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: 0s; }
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { 
        transform: translateY(0);
        opacity: 0.4;
    }
    30% { 
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* Input Section */
.chat-input {
    padding: 25px 30px;
    background: white;
    border-top: 1px solid rgba(226, 232, 240, 0.8);
    display: flex;
    gap: 15px;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.input-container {
    flex: 1;
    position: relative;
}

#messageInput {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 25px;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    background: #f8fafc;
    font-family: inherit;
    resize: none;
}

#messageInput:focus {
    border-color: #4facfe;
    background: white;
    box-shadow: 
        0 0 0 3px rgba(79, 172, 254, 0.1),
        0 4px 12px rgba(79, 172, 254, 0.15);
    transform: translateY(-1px);
}

#messageInput:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: #f1f5f9;
}

/* Send Button */
#sendButton {
    padding: 15px 24px;
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 
        0 4px 12px rgba(79, 172, 254, 0.3),
        0 2px 6px rgba(79, 172, 254, 0.2);
    min-width: 120px;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

#sendButton:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(79, 172, 254, 0.4),
        0 4px 12px rgba(79, 172, 254, 0.3);
    background: linear-gradient(135deg, #00f2fe, #4facfe);
}

#sendButton:active:not(:disabled) {
    transform: translateY(0);
    transition: transform 0.1s ease;
}

#sendButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    background: #94a3b8;
}

/* Voice Button */
.voice-btn {
    padding: 15px;
    background: linear-gradient(135deg, #a8edea, #fed6e3);
    color: #333;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(168, 237, 234, 0.3);
    min-width: 50px;
}

.voice-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(168, 237, 234, 0.4);
}

.voice-btn.listening {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    animation: pulse 1.5s infinite;
}

.voice-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: 40px 20px;
    color: #64748b;
    font-size: 1.1rem;
    line-height: 1.6;
    background: white;
    border-radius: 15px;
    margin: 20px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: all 0.3s ease;
}

.welcome-message i {
    font-size: 3rem;
    color: #4facfe;
    margin-bottom: 20px;
    display: block;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Word Animation */
.word-animation {
    display: inline;
    opacity: 0;
    animation: wordFade 0.2s ease-in forwards;
}

@keyframes wordFade {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* =========================
   DARK MODE STYLES
   ========================= */

body.dark-mode {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

body.dark-mode .chat-container {
    background: rgba(30, 41, 59, 0.95);
    border-color: rgba(55, 65, 81, 0.5);
}

body.dark-mode .chat-messages {
    background: linear-gradient(to bottom, #1e293b, #0f172a);
}

body.dark-mode .chat-messages::-webkit-scrollbar-track {
    background: rgba(15, 23, 42, 0.5);
}

body.dark-mode .message.bot .message-content {
    background: #1e293b;
    color: #e2e8f0;
    border-color: #374151;
}

body.dark-mode .welcome-message {
    background: #1e293b;
    color: #94a3b8;
    border-color: #374151;
}

body.dark-mode #messageInput {
    background: #1e293b;
    border-color: #374151;
    color: #e2e8f0;
}

body.dark-mode #messageInput::placeholder {
    color: #64748b;
}

body.dark-mode #messageInput:focus {
    background: #0f172a;
    border-color: #4facfe;
}

body.dark-mode .chat-input {
    background: #1e293b;
    border-top-color: #374151;
}

body.dark-mode .quick-reply-btn {
    background: #1e293b;
    border-color: #4facfe;
    color: #4facfe;
}

body.dark-mode .quick-reply-btn:hover {
    background: #4facfe;
    color: white;
}

/* =========================
   THEME VARIATIONS
   ========================= */

/* Purple Theme (Default) */
body.theme-purple {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Blue Theme */
body.theme-blue {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

body.theme-blue .message.user .message-content {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

body.theme-blue .action-btn:not(.youtube) {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    box-shadow: 0 4px 12px rgba(79, 172, 254, 0.3);
}

body.theme-blue .action-btn:not(.youtube):hover {
    box-shadow: 0 6px 20px rgba(79, 172, 254, 0.4);
}

/* Green Theme */
body.theme-green {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

body.theme-green .chat-header {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

body.theme-green .message.user .message-avatar {
    background: linear-gradient(135deg, #11998e, #38ef7d);
}

body.theme-green .message.user .message-content {
    background: linear-gradient(135deg, #11998e, #38ef7d);
}

body.theme-green .action-btn:not(.youtube) {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    box-shadow: 0 4px 12px rgba(17, 153, 142, 0.3);
}

body.theme-green .action-btn:not(.youtube):hover {
    box-shadow: 0 6px 20px rgba(17, 153, 142, 0.4);
}

body.theme-green #sendButton {
    background: linear-gradient(135deg, #11998e, #38ef7d);
}

body.theme-green #sendButton:hover:not(:disabled) {
    background: linear-gradient(135deg, #38ef7d, #11998e);
}

/* Orange Theme */
body.theme-orange {
    background: linear-gradient(135deg, #f46b45 0%, #eea849 100%);
}

body.theme-orange .chat-header {
    background: linear-gradient(135deg, #f46b45 0%, #eea849 100%);
}

body.theme-orange .message.user .message-avatar {
    background: linear-gradient(135deg, #f46b45, #eea849);
}

body.theme-orange .message.user .message-content {
    background: linear-gradient(135deg, #f46b45, #eea849);
}

body.theme-orange .action-btn:not(.youtube) {
    background: linear-gradient(135deg, #f46b45, #eea849);
    box-shadow: 0 4px 12px rgba(244, 107, 69, 0.3);
}

body.theme-orange .action-btn:not(.youtube):hover {
    box-shadow: 0 6px 20px rgba(244, 107, 69, 0.4);
}

body.theme-orange #sendButton {
    background: linear-gradient(135deg, #f46b45, #eea849);
}

body.theme-orange #sendButton:hover:not(:disabled) {
    background: linear-gradient(135deg, #eea849, #f46b45);
}

/* =========================
   RESPONSIVE DESIGN
   ========================= */

@media (max-width: 768px) {
    body {
        padding: 0;
    }
    
    .chat-container {
        height: 100vh;
        margin: 0;
        border-radius: 0;
        max-width: 100%;
    }
    
    .chat-header {
        padding: 20px;
    }
    
    .chat-header h1 {
        font-size: 1.5rem;
    }
    
    .chat-header p {
        font-size: 1rem;
    }
    
    .message-content {
        max-width: 85%;
        padding: 15px 18px;
        font-size: 0.95rem;
    }
    
    .chat-messages {
        padding: 20px;
        gap: 15px;
    }
    
    .chat-input {
        padding: 20px;
        gap: 12px;
    }
    
    #messageInput {
        padding: 12px 18px;
        font-size: 16px;
    }
    
    #sendButton {
        padding: 12px 20px;
        min-width: 100px;
        font-size: 0.9rem;
    }
    
    .welcome-message {
        padding: 30px 15px;
        margin: 15px 0;
        font-size: 1rem;
    }
    
    .welcome-message i {
        font-size: 2.5rem;
        margin-bottom: 15px;
    }

    .quick-replies {
        padding: 10px 20px 0;
    }

    .quick-reply-btn {
        padding: 8px 14px;
        font-size: 0.85rem;
    }

    .theme-controls {
        top: 10px;
        right: 10px;
        gap: 8px;
    }

    .theme-btn {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }

    .action-buttons {
        padding: 0 20px 10px;
    }

    .action-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .chat-header h1 {
        font-size: 1.3rem;
    }
    
    .chat-header p {
        font-size: 0.9rem;
    }
    
    .message-content {
        max-width: 90%;
        padding: 12px 16px;
    }
    
    .chat-messages {
        padding: 15px;
    }
    
    .chat-input {
        padding: 15px;
    }
    
    .message-avatar {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
}

/* =========================
   ACCESSIBILITY
   ========================= */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .chat-container {
        animation: none;
    }
    
    .message {
        animation: none;
    }
    
    .word-animation {
        animation: none;
        opacity: 1;
    }
}

@media (prefers-contrast: high) {
    .chat-container {
        border: 2px solid #000;
    }
    
    .message-content {
        border: 2px solid #000;
    }
    
    #messageInput {
        border: 2px solid #000;
    }
    
    #sendButton {
        border: 2px solid #000;
    }
}

.message-avatar:focus,
#messageInput:focus,
#sendButton:focus {
    outline: 2px solid #4facfe;
    outline-offset: 2px;
}