/**
 * AI Knowledgebase Chat Widget Styles
 *
 * Minimal/Clean design with 400x550px medium size
 */

/* CSS Custom Properties for theming */
:root {
    --aikb-primary: #2563eb;
    --aikb-primary-hover: #1d4ed8;
    --aikb-text: #1f2937;
    --aikb-text-light: #6b7280;
    --aikb-bg: #ffffff;
    --aikb-bg-secondary: #f9fafb;
    --aikb-border: #e5e7eb;
    --aikb-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    --aikb-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --aikb-radius: 12px;
    --aikb-radius-lg: 16px;
    --aikb-transition: 300ms ease;
}

/* Floating Bubble - !important to prevent theme overrides on mobile */
.aikb-chat-bubble {
    position: fixed !important;
    bottom: 24px !important;
    right: 24px !important;
    width: 60px !important;
    height: 60px !important;
    padding: 0 !important;
    border-radius: 50% !important;
    background: var(--aikb-primary) !important;
    color: #fff !important;
    border: none !important;
    cursor: pointer !important;
    box-shadow: var(--aikb-shadow) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: transform var(--aikb-transition), background var(--aikb-transition);
    z-index: 99998 !important;
}

.aikb-chat-bubble:hover {
    transform: scale(1.05);
    background: var(--aikb-primary-hover);
}

.aikb-chat-bubble svg {
    width: 28px;
    height: 28px;
    fill: currentColor;
}

.aikb-chat-bubble.aikb-left {
    right: auto !important;
    left: 24px !important;
}

.aikb-chat-bubble.aikb-hidden {
    display: none;
}

/* Unread indicator */
.aikb-chat-bubble .aikb-unread {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 20px;
    height: 20px;
    background: #ef4444;
    border-radius: 50%;
    font-size: 11px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #fff;
}

/* Chat Window */
.aikb-chat-window {
    position: fixed;
    bottom: 100px;
    right: 24px;
    width: 400px;
    height: 700px;
    max-height: calc(100vh - 140px);
    background: var(--aikb-bg);
    border-radius: var(--aikb-radius);
    box-shadow: var(--aikb-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 99999;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    pointer-events: none;
    transition: opacity var(--aikb-transition), transform var(--aikb-transition);
}

.aikb-chat-window.aikb-open {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.aikb-chat-window.aikb-left {
    right: auto;
    left: 24px;
}

.aikb-chat-window.aikb-inline {
    position: relative;
    bottom: auto;
    right: auto;
    left: auto;
    margin: 0 auto;
}

/* Expanded state (desktop only) */
.aikb-chat-window.aikb-expanded {
    width: 600px;
    height: 80vh;
    max-height: calc(100vh - 140px);
}

/* Header */
.aikb-chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--aikb-bg);
    border-bottom: 1px solid var(--aikb-border);
    flex-shrink: 0;
}

.aikb-chat-header-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--aikb-text);
}

.aikb-chat-header-title svg {
    width: 20px;
    height: 20px;
    fill: var(--aikb-primary);
}

.aikb-chat-header-actions {
    display: flex;
    gap: 4px;
}

.aikb-chat-header-btn {
    width: 32px !important;
    height: 32px !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
    background-color: transparent !important;
    color: #333 !important;
    cursor: pointer !important;
    border-radius: 6px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: background var(--aikb-transition), color var(--aikb-transition);
}

.aikb-chat-header-btn:hover {
    background: var(--aikb-bg-secondary);
    color: #000;
}

.aikb-chat-header-btn svg {
    width: 18px;
    height: 18px;
    fill: #333;
}

.aikb-chat-header-btn:hover svg {
    fill: #000;
}

/* Messages Container */
.aikb-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

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

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

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

/* Message Bubbles */
.aikb-message {
    max-width: 85%;
    animation: aikb-fade-in 0.3s ease;
}

@keyframes aikb-fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.aikb-message-ai {
    align-self: flex-start;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

/* AI Avatar */
.aikb-message-avatar {
    flex-shrink: 0;
}

.aikb-message-avatar img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

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

.aikb-message-bubble {
    padding: 12px 16px;
    border-radius: var(--aikb-radius-lg);
    font-size: 14px;
    line-height: 1.5;
    word-wrap: break-word;
    overflow-wrap: break-word;
    min-width: 0;
    max-width: 100%;
}

.aikb-message-ai .aikb-message-bubble {
    background: var(--aikb-bg-secondary);
    color: var(--aikb-text);
    border-bottom-left-radius: 4px;
    overflow: hidden;
}

.aikb-message-user .aikb-message-bubble {
    background: var(--aikb-primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

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

.aikb-typing-dot {
    width: 8px;
    height: 8px;
    background: var(--aikb-text-light);
    border-radius: 50%;
    animation: aikb-typing 1.4s infinite;
}

.aikb-typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.aikb-typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes aikb-typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* Product Cards Container */
.aikb-products {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 8px 4px;
    margin: 12px -8px 0 -8px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--aikb-border) transparent;
    cursor: grab;
}

.aikb-products:active {
    cursor: grabbing;
}

.aikb-products::-webkit-scrollbar {
    height: 6px;
}

.aikb-products::-webkit-scrollbar-track {
    background: transparent;
}

.aikb-products::-webkit-scrollbar-thumb {
    background: var(--aikb-border);
    border-radius: 3px;
}

.aikb-products::-webkit-scrollbar-thumb:hover {
    background: var(--aikb-text-light);
}

/* Product Card */
.aikb-product-card {
    flex-shrink: 0;
    width: 140px;
    background: var(--aikb-bg);
    border: 1px solid var(--aikb-border);
    border-radius: var(--aikb-radius);
    padding: 12px;
    text-align: center;
    transition: box-shadow var(--aikb-transition), border-color var(--aikb-transition);
    scroll-snap-align: start;
}

.aikb-product-card:hover {
    box-shadow: var(--aikb-shadow-sm);
    border-color: var(--aikb-primary);
}

.aikb-product-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    margin: 0 auto 8px;
    background: var(--aikb-bg-secondary);
}

.aikb-product-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--aikb-text);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.3;
    min-height: 34px;
}

.aikb-product-name a {
    color: inherit;
    text-decoration: none;
}

.aikb-product-name a:hover {
    color: var(--aikb-primary);
}

.aikb-product-price {
    font-size: 14px;
    font-weight: 600;
    color: var(--aikb-primary);
    margin-bottom: 8px;
}

.aikb-product-price del {
    color: var(--aikb-text-light);
    font-weight: 400;
    font-size: 12px;
}

.aikb-product-stock {
    font-size: 11px;
    color: var(--aikb-text-light);
    margin-bottom: 8px;
}

.aikb-product-stock.aikb-out-of-stock {
    color: #ef4444;
}

.aikb-add-to-cart,
.aikb-view-options {
    display: block !important;
    width: 100% !important;
    padding: 8px 12px !important;
    font-size: 12px !important;
    font-weight: 500 !important;
    background: var(--aikb-primary) !important;
    color: #fff !important;
    border: none !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    text-decoration: none !important;
    text-align: center !important;
    transition: background var(--aikb-transition), color var(--aikb-transition);
    box-sizing: border-box !important;
}

.aikb-add-to-cart:hover,
.aikb-view-options:hover {
    background: var(--aikb-primary-hover);
    color: #fff;
}

.aikb-add-to-cart:disabled {
    background: var(--aikb-border);
    cursor: not-allowed;
}

.aikb-add-to-cart.aikb-added {
    background: #10b981;
}

/* Follow-up Questions */
.aikb-followups {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--aikb-border);
}

.aikb-followups-label {
    font-size: 12px;
    color: var(--aikb-text-light);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.aikb-followups-label svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}

.aikb-followup-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

button.aikb-followup-chip {
    padding: 6px 12px;
    font-size: 13px;
    font-family: inherit;
    background: #fff;
    border: 1px solid var(--aikb-primary);
    border-radius: 16px;
    color: #333 !important;
    cursor: pointer;
    transition: all var(--aikb-transition);
    word-break: break-word;
    text-align: left;
    max-width: 100%;
    box-sizing: border-box;
    height: auto;
}

button.aikb-followup-chip:hover {
    background: var(--aikb-primary);
    border-color: var(--aikb-primary);
    color: #fff !important;
}

/* Quick Reply Buttons (Yes/No) */
.aikb-quick-replies {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    justify-content: flex-start;
}

button.aikb-quick-reply {
    padding: 6px 18px;
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    background: transparent;
    border: 1px solid var(--aikb-primary);
    border-radius: 50px;
    color: var(--aikb-primary);
    cursor: pointer;
    transition: all var(--aikb-transition);
}

button.aikb-quick-reply:hover {
    background: var(--aikb-primary);
    color: #fff;
}

button.aikb-quick-reply:disabled {
    background: var(--aikb-border);
    border-color: var(--aikb-border);
    color: var(--aikb-text-light);
    cursor: not-allowed;
}

/* WhatsApp Handoff Button */
.aikb-whatsapp-btn {
    display: inline-block;
    background: #25D366;
    color: #fff !important;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    margin-top: 12px;
    transition: background var(--aikb-transition), transform var(--aikb-transition);
}

.aikb-whatsapp-btn:hover {
    background: #128C7E;
    color: #fff !important;
    text-decoration: none;
    transform: scale(1.02);
}

.aikb-whatsapp-btn:focus {
    outline: 2px solid #25D366;
    outline-offset: 2px;
}

/* Warning Banner */
.aikb-warning {
    background: #fef3c7;
    border: 1px solid #f59e0b;
    border-radius: 8px;
    padding: 10px 12px;
    margin-top: 12px;
    font-size: 13px;
    color: #92400e;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.aikb-warning svg {
    width: 16px;
    height: 16px;
    fill: #f59e0b;
    flex-shrink: 0;
    margin-top: 2px;
}

.aikb-warning.aikb-warning-severe {
    background: #fee2e2;
    border-color: #ef4444;
    color: #991b1b;
}

.aikb-warning.aikb-warning-severe svg {
    fill: #ef4444;
}

/* Disclaimer */
.aikb-disclaimer {
    font-size: 11px;
    color: var(--aikb-text-light);
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--aikb-border);
    line-height: 1.4;
}

/* Input Area */
.aikb-chat-input {
    display: flex;
    gap: 8px;
    padding: 16px 20px;
    border-top: 1px solid var(--aikb-border);
    background: var(--aikb-bg);
    flex-shrink: 0;
}

.aikb-chat-input-field {
    flex: 1;
    padding: 10px 14px;
    font-size: 14px;
    border: 1px solid var(--aikb-border);
    border-radius: 20px;
    outline: none;
    transition: border-color var(--aikb-transition);
    font-family: inherit;
}

.aikb-chat-input-field:focus {
    border-color: var(--aikb-primary);
}

.aikb-chat-input-field::placeholder {
    color: var(--aikb-text-light);
}

.aikb-chat-send {
    width: 40px !important;
    height: 40px !important;
    padding: 0 !important;
    border: none !important;
    background: var(--aikb-primary) !important;
    color: #fff !important;
    border-radius: 50% !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: background var(--aikb-transition), transform var(--aikb-transition);
    flex-shrink: 0 !important;
}

.aikb-chat-send:hover {
    background: var(--aikb-primary-hover);
}

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

.aikb-chat-send:disabled {
    background: var(--aikb-border);
    cursor: not-allowed;
}

.aikb-chat-send svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* Related Topics */
.aikb-related-topics {
    margin-top: 12px;
}

.aikb-related-topics-label {
    font-size: 12px;
    color: var(--aikb-text-light);
    margin-bottom: 6px;
}

.aikb-related-topic-link {
    display: inline-block;
    font-size: 13px;
    color: var(--aikb-primary);
    text-decoration: none;
    margin-right: 12px;
    margin-bottom: 4px;
}

.aikb-related-topic-link:hover {
    text-decoration: underline;
}

/* Desktop only elements */
.aikb-desktop-only {
    display: flex;
}

/* Mobile Responsive - !important to prevent theme overrides */
@media (max-width: 480px) {
    /* Hide expand button on mobile */
    .aikb-desktop-only {
        display: none !important;
    }

    .aikb-chat-bubble {
        bottom: 16px !important;
        right: 16px !important;
        width: 56px !important;
        height: 56px !important;
    }

    .aikb-chat-bubble.aikb-left {
        left: 16px !important;
        right: auto !important;
    }

    .aikb-chat-window {
        position: fixed !important;
        bottom: auto !important;
        right: 0 !important;
        left: 0 !important;
        top: 0 !important;
        width: 100% !important;
        height: 100% !important;
        max-height: none !important;
        border-radius: 0 !important;
        /* Prevent iOS bounce/rubber-banding */
        overscroll-behavior: contain;
    }

    .aikb-chat-window.aikb-left {
        left: 0 !important;
    }

    .aikb-chat-window.aikb-open {
        transform: translateY(0) !important;
    }

    /* Chat container should be flex column */
    .aikb-chat-window {
        display: flex !important;
        flex-direction: column !important;
    }

    /* Header stays fixed at top */
    .aikb-chat-header {
        flex-shrink: 0 !important;
    }

    /* Messages take remaining space and scroll */
    .aikb-chat-messages {
        flex: 1 !important;
        min-height: 0 !important;
        overflow-y: auto !important;
        overscroll-behavior: contain;
    }

    /* Input stays at bottom */
    .aikb-chat-input {
        flex-shrink: 0 !important;
        background: var(--aikb-bg) !important;
    }

    .aikb-product-card {
        width: 120px !important;
    }

    .aikb-product-image {
        width: 60px !important;
        height: 60px !important;
    }

    /* Smaller follow-up chips on mobile */
    button.aikb-followup-chip {
        font-size: 12px !important;
        padding: 5px 10px !important;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .aikb-chat-window,
    .aikb-chat-bubble,
    .aikb-message,
    .aikb-typing-dot {
        animation: none;
        transition: none;
    }
}

/* Focus states for keyboard navigation */
.aikb-chat-bubble:focus,
.aikb-chat-header-btn:focus,
.aikb-followup-chip:focus,
.aikb-quick-reply:focus,
.aikb-add-to-cart:focus,
.aikb-view-options:focus,
.aikb-chat-send:focus,
.aikb-expand:focus {
    outline: 2px solid var(--aikb-primary);
    outline-offset: 2px;
}

.aikb-chat-input-field:focus {
    outline: none;
    border-color: var(--aikb-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}