/**
 * Styles modernes pour le widget chatbot frontend
 * Design amélioré avec dégradés, animations et esthétique moderne
 * 
 * @package AI_Site_Assistant
 * @since 1.0.0
 */

/* Variables CSS modernes */
:root {
    /* Couleurs par défaut (surchargées par le template via variables inline) */
    --chatbot-primary: #667eea;
    --chatbot-primary-dark: #5a67d8;
    --chatbot-secondary: #764ba2;
    --chatbot-gradient: linear-gradient(135deg, var(--chatbot-primary) 0%, var(--chatbot-secondary) 100%);
    --chatbot-gradient-hover: linear-gradient(135deg, var(--chatbot-primary) 0%, var(--chatbot-secondary) 100%);
    --chatbot-text: #2d3748;
    --chatbot-text-light: #718096;
    --chatbot-border: #e2e8f0;
    --chatbot-bg: #ffffff;
    --chatbot-bg-light: #f7fafc;
    --chatbot-shadow: 0 10px 25px rgba(102, 126, 234, 0.15);
    --chatbot-shadow-hover: 0 20px 40px rgba(102, 126, 234, 0.25);
    --chatbot-radius: 16px;
    --chatbot-radius-small: 8px;
    --chatbot-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --chatbot-z-index: 9999;
    --chatbot-pulse: 0 0 0 0 rgba(102, 126, 234, 0.7);
}

/* Widget principal */
.ai-chatbot-widget {
    position: fixed;
    z-index: var(--chatbot-z-index);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--chatbot-text);
    --chatbot-color: var(--chatbot-primary);
    /* Optimisations pour les performances de scroll */
    will-change: transform;
    backface-visibility: hidden;
    transform: translateZ(0);
}

/* Positions du widget */
.ai-chatbot-widget.bottom-right {
    bottom: 24px;
    right: 24px;
}

.ai-chatbot-widget.bottom-left {
    bottom: 24px;
    left: 24px;
}

.ai-chatbot-widget.top-right {
    top: 24px;
    right: 24px;
}

.ai-chatbot-widget.top-left {
    top: 24px;
    left: 24px;
}

/* Sur mobile, respecter la position choisie et la safe-area */
@media (max-width: 480px) {
    .ai-chatbot-widget.bottom-right { bottom: max(16px, env(safe-area-inset-bottom)); right: max(16px, env(safe-area-inset-right)); top: auto; left: auto; }
    .ai-chatbot-widget.bottom-left  { bottom: max(16px, env(safe-area-inset-bottom)); left: max(16px, env(safe-area-inset-left));  top: auto; right: auto; }
    .ai-chatbot-widget.top-right    { top:    max(16px, env(safe-area-inset-top));    right: max(16px, env(safe-area-inset-right)); bottom: auto; left: auto; }
    .ai-chatbot-widget.top-left     { top:    max(16px, env(safe-area-inset-top));    left:  max(16px, env(safe-area-inset-left));  bottom: auto; right: auto; }
}

/* Bouton de déclenchement moderne */
.ai-chatbot-trigger {
    width: 64px;
    height: 64px;
    background: var(--chatbot-gradient);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--chatbot-shadow);
    transition: var(--chatbot-transition);
    color: white;
    z-index: 1000;
    padding: 0;
    font-family: inherit;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.ai-chatbot-trigger::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--chatbot-gradient-hover);
    opacity: 0;
    transition: var(--chatbot-transition);
    border-radius: 50%;
}

.ai-chatbot-trigger:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: var(--chatbot-shadow-hover);
    animation: pulse 2s infinite;
}

.ai-chatbot-trigger:hover::before {
    opacity: 1;
}

.ai-chatbot-trigger:active {
    transform: scale(0.95);
}

.ai-chatbot-trigger svg {
    color: white;
    transition: var(--chatbot-transition);
    z-index: 1;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.ai-chatbot-trigger .chatbot-icon-close {
    position: absolute;
    opacity: 0;
    transform: rotate(90deg) scale(0.8);
}

.ai-chatbot-widget.open .ai-chatbot-trigger .chatbot-icon-open {
    opacity: 0;
    transform: rotate(-90deg) scale(0.8);
}

.ai-chatbot-widget.open .ai-chatbot-trigger .chatbot-icon-close {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* Animation de pulsation */
@keyframes pulse {
    0% {
        box-shadow: var(--chatbot-shadow), var(--chatbot-pulse);
    }
    70% {
        box-shadow: var(--chatbot-shadow), 0 0 0 10px rgba(102, 126, 234, 0);
    }
    100% {
        box-shadow: var(--chatbot-shadow), var(--chatbot-pulse);
    }
}

/* Fenêtre de chat moderne */
.ai-chatbot-window {
    position: absolute;
    width: 380px;
    height: 520px;
    background: var(--chatbot-bg);
    border-radius: var(--chatbot-radius);
    box-shadow: var(--chatbot-shadow);
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    transform: translateY(30px) scale(0.9);
    transition: var(--chatbot-transition);
    overflow: hidden;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Positionnement de la fenêtre */
.ai-chatbot-widget.bottom-right .ai-chatbot-window,
.ai-chatbot-widget.top-right .ai-chatbot-window {
    right: 0;
    bottom: 85px;
}

.ai-chatbot-widget.bottom-left .ai-chatbot-window,
.ai-chatbot-widget.top-left .ai-chatbot-window {
    left: 0;
    bottom: 85px;
}

.ai-chatbot-widget.top-right .ai-chatbot-window,
.ai-chatbot-widget.top-left .ai-chatbot-window {
    bottom: auto;
    top: 85px;
}

.ai-chatbot-window.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* En-tête moderne avec dégradé */
.ai-chatbot-header {
    background: var(--chatbot-gradient);
    color: white;
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.ai-chatbot-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, transparent 100%);
    pointer-events: none;
}

.chatbot-title {
    z-index: 1;
}

.chatbot-title h4 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.025em;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.chatbot-subtitle {
    margin: 4px 0 0 0;
    font-size: 13px;
    opacity: 0.9;
    font-weight: 400;
}

.chatbot-status {
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 1;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #48bb78;
    animation: statusPulse 2s infinite;
}

.status-text {
    font-size: 12px;
    opacity: 0.9;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Zone des messages */
.ai-chatbot-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: var(--chatbot-bg-light);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

.ai-chatbot-messages::-webkit-scrollbar-track {
    background: transparent;
}

.ai-chatbot-messages::-webkit-scrollbar-thumb {
    background: var(--chatbot-border);
    border-radius: 3px;
}

.ai-chatbot-messages::-webkit-scrollbar-thumb:hover {
    background: var(--chatbot-text-light);
}

/* Messages */
.message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
    animation: messageSlide 0.3s ease-out;
}

/* Nouveau système (structure générée par JS): aligner bot à gauche, user à droite */
.ai-chatbot-message {
    display: flex;
    gap: 10px;
    max-width: 85%;
    animation: messageSlide 0.3s ease-out;
}
.ai-chatbot-message.bot { align-self: flex-start; }
.ai-chatbot-message.user { align-self: flex-end; flex-direction: row-reverse; }

.ai-chatbot-message-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    background: #e2e8f0;
    color: #4a5568;
    flex-shrink: 0;
}

.ai-chatbot-message-content { display: flex; flex-direction: column; }

.ai-chatbot-message-bubble {
    padding: 12px 16px;
    border-radius: 20px;
    font-size: 14px;
    line-height: 1.5;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.ai-chatbot-message.bot .ai-chatbot-message-bubble {
    background: #eef2f7;
    color: var(--chatbot-text);
}
.ai-chatbot-message.user .ai-chatbot-message-bubble {
    background: var(--chatbot-gradient);
    color: #fff;
}

.ai-chatbot-message-time {
    font-size: 11px;
    color: var(--chatbot-text-light);
    margin-top: 4px;
}

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

.user-message {
    align-self: flex-end;
    align-items: flex-end;
}

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

.message-content {
    padding: 12px 16px;
    border-radius: var(--chatbot-radius-small);
    font-size: 14px;
    line-height: 1.5;
    word-wrap: break-word;
    position: relative;
}

.user-message .message-content {
    background: var(--chatbot-gradient);
    color: white;
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
}

.bot-message .message-content {
    background: white;
    color: var(--chatbot-text);
    border: 1px solid var(--chatbot-border);
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.message-time {
    font-size: 11px;
    color: var(--chatbot-text-light);
    margin-top: 4px;
    padding: 0 4px;
}

/* Message de bienvenue */
/* Bulle d'invitation (message de bienvenue) */
.ai-chatbot-welcome {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    max-width: 85%;
}

.ai-chatbot-welcome-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #e2e8f0;
    color: #4a5568;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-chatbot-welcome-bubble {
    background: #eef2f7;
    color: var(--chatbot-text);
    border-radius: 18px;
    padding: 12px 16px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
    position: relative;
}

.ai-chatbot-welcome-bubble::after {
    content: '';
    position: absolute;
    left: -6px;
    top: 12px;
    width: 0; height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 6px solid #eef2f7;
}

.ai-chatbot-welcome-message {
    font-weight: 500;
}

/* Indicateur de frappe */
.ai-chatbot-typing {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--chatbot-bg);
    border-top: 1px solid var(--chatbot-border);
}

.typing-indicator {
    display: flex;
    gap: 4px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--chatbot-primary);
    animation: typingDot 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typingDot {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.typing-text {
    font-size: 13px;
    color: var(--chatbot-text-light);
    font-style: italic;
}

/* Zone de saisie */
.ai-chatbot-input {
    padding: 20px;
    background: var(--chatbot-bg);
    border-top: 1px solid var(--chatbot-border);
    flex-shrink: 0;
    backdrop-filter: blur(10px);
}

.input-container {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: var(--chatbot-bg-light);
    border: 2px solid var(--chatbot-border);
    border-radius: 20px;
    padding: 12px 16px;
    transition: var(--chatbot-transition);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.input-container:focus-within {
    border-color: var(--chatbot-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15), 0 4px 12px rgba(102, 126, 234, 0.1);
    background: white;
}

#ai-chatbot-message-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    color: var(--chatbot-text);
    resize: none;
    min-height: 20px;
    max-height: 100px;
    padding: 4px 0;
}

#ai-chatbot-message-input::placeholder {
    color: var(--chatbot-text-light);
}

.input-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
    color: var(--chatbot-text-light);
}

.character-count { font-variant-numeric: tabular-nums; }
.powered-by { opacity: 0.8; }

.send-button {
    width: 40px;
    height: 40px;
    background: var(--chatbot-gradient);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--chatbot-transition);
    color: white;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.send-button:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.4);
    background: var(--chatbot-gradient-hover);
}

.send-button:active {
    transform: scale(0.95);
}

.send-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    background: #cbd5e0;
    box-shadow: none;
}

/* Badge de notification */
.ai-chatbot-notification {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #e53e3e;
    color: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    animation: notificationBounce 0.5s ease-out;
}

@keyframes notificationBounce {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

/* Actions rapides */
.ai-chatbot-quick-actions {
    padding: 16px 20px;
    background: var(--chatbot-bg-light);
    border-top: 1px solid var(--chatbot-border);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.quick-action {
    background: white;
    border: 1px solid var(--chatbot-border);
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 13px;
    cursor: pointer;
    transition: var(--chatbot-transition);
    color: var(--chatbot-text);
}

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

/* Responsive */
@media (max-width: 480px) {
    .ai-chatbot-window {
        width: calc(100vw - 40px);
        height: calc(100vh - 100px);
        max-width: 380px;
        max-height: 600px;
    }
    
    .ai-chatbot-widget.bottom-right,
    .ai-chatbot-widget.bottom-left {
        bottom: 20px;
    }
    
    .ai-chatbot-widget.bottom-right {
        right: 20px;
    }
    
    .ai-chatbot-widget.bottom-left {
        left: 20px;
    }
}

/* Animations d'entrée */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-chatbot-window.open {
    animation: fadeInUp 0.4s ease-out;
}

/* Mode sombre (optionnel) */
@media (prefers-color-scheme: dark) {
    :root {
        --chatbot-text: #e2e8f0;
        --chatbot-text-light: #a0aec0;
        --chatbot-bg: #2d3748;
        --chatbot-bg-light: #4a5568;
        --chatbot-border: #4a5568;
    }
    
    .bot-message .message-content {
        background: #4a5568;
        color: var(--chatbot-text);
        border-color: #718096;
    }
    
    .input-container {
        background: #4a5568;
        border-color: #718096;
    }
    
    .quick-action {
        background: #4a5568;
        border-color: #718096;
        color: var(--chatbot-text);
    }
}