/* ============================================
   AI Assistant Page - Modern Minimal UI
   ============================================ */

:root {
    --ai-primary: #6366f1;
    --ai-primary-light: #818cf8;
    --ai-primary-bg: #eef2ff;
    --ai-surface: #ffffff;
    --ai-surface-alt: #f8fafc;
    --ai-border: #e2e8f0;
    --ai-border-light: #f1f5f9;
    --ai-text: #1e293b;
    --ai-text-muted: #94a3b8;
    --ai-text-secondary: #64748b;
    --ai-sidebar-bg: #f8fafc;
    --ai-sidebar-active: #eef2ff;
    --ai-content-green: #10b981;
    --ai-sales-amber: #f59e0b;
    --ai-general-blue: #6366f1;
    --ai-radius: 12px;
    --ai-radius-lg: 16px;
    --ai-shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --ai-shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --ai-shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
}

.ai-assistant-page {
    display: flex;
    height: calc(100vh - 60px);
    overflow: hidden;
    background: var(--ai-surface-alt);
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', sans-serif;
}

/* ========== Sidebar ========== */

.ai-sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--ai-sidebar-bg);
    color: var(--ai-text);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--ai-border);
    transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

.ai-sidebar:not(.sidebar-visible) {
    margin-left: -280px;
    opacity: 0;
    pointer-events: none;
}

.ai-sidebar.sidebar-visible {
    margin-left: 0;
    opacity: 1;
}

.ai-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1rem 0.75rem;
    border-bottom: 1px solid var(--ai-border-light);
}

.ai-sidebar-header h5 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ai-text);
    letter-spacing: -0.01em;
}

.ai-sidebar-header .btn {
    color: var(--ai-text-muted);
    border: none;
    background: transparent;
    padding: 0.25rem;
    border-radius: 6px;
    transition: all 0.15s;
}

.ai-sidebar-header .btn:hover {
    background: var(--ai-border);
    color: var(--ai-text);
}

.ai-sidebar-filter {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--ai-border-light);
}

.ai-sidebar-filter .form-select {
    background-color: var(--ai-surface);
    border: 1px solid var(--ai-border);
    color: var(--ai-text);
    font-size: 0.78rem;
    border-radius: 8px;
    padding: 0.35rem 0.5rem;
}

.ai-sidebar-filter .form-select:focus {
    border-color: var(--ai-primary-light);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.ai-sidebar-conversations {
    flex: 1;
    overflow-y: auto;
    padding: 0.4rem 0.5rem;
}

.ai-sidebar-conversations::-webkit-scrollbar {
    width: 3px;
}

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

.ai-sidebar-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.55rem 0.65rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.15s ease;
    margin-bottom: 1px;
    position: relative;
}

.ai-sidebar-item:hover {
    background: var(--ai-border-light);
}

.ai-sidebar-item.active {
    background: var(--ai-sidebar-active);
    border: 1px solid rgba(99, 102, 241, 0.15);
}

.ai-sidebar-item-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    font-size: 0.8rem;
    margin-top: 2px;
    color: var(--ai-text-secondary);
}

.ai-sidebar-item.active .ai-sidebar-item-icon {
    opacity: 0.8;
    color: var(--ai-primary);
}

.ai-sidebar-item-content {
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.ai-sidebar-item-title {
    font-size: 0.82rem;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--ai-text);
    font-weight: 500;
}

.ai-sidebar-item-meta {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 2px;
    font-size: 0.68rem;
    color: var(--ai-text-muted);
}

.ai-sidebar-item-actions {
    display: none;
    gap: 0.25rem;
    flex-shrink: 0;
    align-items: center;
}

.ai-sidebar-item:hover .ai-sidebar-item-actions {
    display: flex;
}

.ai-sidebar-item-actions .btn {
    color: var(--ai-text-muted) !important;
}
.ai-sidebar-item-actions .btn:hover {
    color: var(--ai-text) !important;
}
.ai-sidebar-item-actions .text-danger:hover {
    color: #ef4444 !important;
}

.badge-category {
    font-size: 0.58rem;
    padding: 0.12rem 0.35rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-content {
    background: rgba(16, 185, 129, 0.12);
    color: #059669;
}

.badge-sales {
    background: rgba(245, 158, 11, 0.12);
    color: #d97706;
}

.badge-general {
    background: rgba(99, 102, 241, 0.12);
    color: #6366f1;
}

/* ========== Sidebar User Info ========== */

.ai-sidebar-user {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.45rem 0.75rem;
    font-size: 0.72rem;
    color: var(--ai-text-muted);
    border-bottom: 1px solid var(--ai-border-light);
}

.ai-sidebar-user i {
    font-size: 0.85rem;
    color: var(--ai-primary-light);
}

/* ========== Sidebar Groups ========== */

.ai-sidebar-group {
    margin-bottom: 0.25rem;
}

.ai-sidebar-group-header {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.65rem 0.2rem;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ai-text-muted);
    margin-top: 0.3rem;
}

.ai-sidebar-group-icon {
    font-size: 0.72rem;
}

.ai-sidebar-group-label {
    flex: 1;
}

.ai-sidebar-group-count {
    background: var(--ai-border);
    color: var(--ai-text-secondary);
    font-size: 0.6rem;
    font-weight: 600;
    padding: 0.05rem 0.35rem;
    border-radius: 8px;
    min-width: 18px;
    text-align: center;
}

/* ========== Copy Buttons ========== */

.ai-copy-btn.text-success i {
    color: #10b981 !important;
}

/* ========== Main Area ========== */

.ai-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--ai-surface);
}

/* ========== Top Bar ========== */

.ai-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.25rem;
    background: var(--ai-surface);
    border-bottom: 1px solid var(--ai-border-light);
    gap: 0.75rem;
    flex-shrink: 0;
}

.ai-topbar-left {
    display: flex;
    align-items: center;
}

.ai-topbar-left .btn {
    border-radius: 8px;
    font-size: 0.82rem;
}

.ai-topbar-left .btn-primary {
    background: var(--ai-primary);
    border-color: var(--ai-primary);
    font-weight: 500;
}

.ai-topbar-left .btn-primary:hover {
    background: #4f46e5;
    border-color: #4f46e5;
}

.ai-topbar-right {
    display: flex;
    align-items: center;
}

.ai-topbar-right .badge {
    background: var(--ai-surface-alt) !important;
    color: var(--ai-text-muted) !important;
    font-weight: 500;
    font-size: 0.72rem;
    border: 1px solid var(--ai-border);
}

.ai-category-selector {
    display: flex;
    gap: 0.25rem;
    flex-wrap: nowrap;
    background: var(--ai-surface-alt);
    padding: 3px;
    border-radius: 10px;
    border: 1px solid var(--ai-border-light);
}

.ai-category-selector .btn {
    border-radius: 8px;
    padding: 0.3rem 0.85rem;
    font-size: 0.78rem;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
    border: none;
    color: var(--ai-text-secondary);
    background: transparent;
}

.ai-category-selector .btn:hover {
    background: var(--ai-surface);
    color: var(--ai-text);
}

.btn-category-content.active {
    background: var(--ai-surface) !important;
    border-color: transparent;
    color: var(--ai-content-green) !important;
    box-shadow: var(--ai-shadow-sm);
}

.btn-category-sales.active {
    background: var(--ai-surface) !important;
    border-color: transparent;
    color: var(--ai-sales-amber) !important;
    box-shadow: var(--ai-shadow-sm);
}

.btn-category-general.active {
    background: var(--ai-surface) !important;
    border-color: transparent;
    color: var(--ai-general-blue) !important;
    box-shadow: var(--ai-shadow-sm);
}

/* ========== Category Banner ========== */

.ai-category-banner {
    padding: 0.45rem 1.25rem;
    border-bottom: 1px solid var(--ai-border-light);
    font-size: 0.82rem;
    flex-shrink: 0;
}

.banner-content {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.banner-icon {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.banner-tags {
    display: flex;
    gap: 0.3rem;
    margin-left: 0.25rem;
    flex-wrap: wrap;
}

.banner-tag {
    font-size: 0.7rem;
    background: rgba(0, 0, 0, 0.04);
    padding: 0.1rem 0.45rem;
    border-radius: 6px;
    white-space: nowrap;
    color: var(--ai-text-secondary);
}

.banner-content strong {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ai-text);
}

.ai-category-banner.banner-content {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.04) 0%, rgba(16, 185, 129, 0.08) 100%);
    border-bottom-color: rgba(16, 185, 129, 0.1);
}

.ai-category-banner.banner-sales {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.04) 0%, rgba(245, 158, 11, 0.08) 100%);
    border-bottom-color: rgba(245, 158, 11, 0.1);
}

.ai-category-banner.banner-general {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.04) 0%, rgba(99, 102, 241, 0.08) 100%);
    border-bottom-color: rgba(99, 102, 241, 0.1);
}

/* ========== Chat Messages ========== */

.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    scroll-behavior: smooth;
    background: var(--ai-surface);
}

.ai-chat-messages::-webkit-scrollbar {
    width: 4px;
}

.ai-chat-messages::-webkit-scrollbar-thumb {
    background: var(--ai-border);
    border-radius: 4px;
}

/* Welcome Screen */

.ai-welcome {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60%;
    text-align: center;
    padding: 2rem;
}

.ai-welcome-icon {
    font-size: 2.75rem;
    margin-bottom: 0.75rem;
    opacity: 0.85;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ai-primary-bg);
    border-radius: 16px;
}

.ai-welcome h4 {
    color: var(--ai-text);
    font-weight: 700;
    margin-bottom: 0.4rem;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.ai-welcome p {
    max-width: 400px;
    font-size: 0.9rem;
    color: var(--ai-text-secondary);
}

.ai-quick-prompts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin-top: 1.25rem;
    max-width: 520px;
    width: 100%;
}

.ai-quick-prompt {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 0.85rem;
    border-radius: 10px;
    font-size: 0.8rem;
    white-space: nowrap;
    transition: all 0.2s;
    border: 1px solid var(--ai-border);
    background: var(--ai-surface);
    color: var(--ai-text-secondary);
    text-align: left;
}

.ai-quick-prompt:hover {
    transform: translateY(-1px);
    box-shadow: var(--ai-shadow-md);
    border-color: var(--ai-primary-light);
    color: var(--ai-primary);
    background: var(--ai-primary-bg);
}

.ai-quick-prompt-icon {
    font-size: 0.95rem;
}

/* Messages */

.ai-message {
    display: flex;
    gap: 0.65rem;
    margin-bottom: 1rem;
    align-items: flex-start;
    max-width: 820px;
    margin-left: auto;
    margin-right: auto;
}

.ai-message-user {
    flex-direction: row-reverse;
}

.ai-message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.85rem;
}

.ai-message-user .ai-message-avatar {
    background: var(--ai-primary);
    color: white;
}

.ai-message-assistant .ai-message-avatar {
    background: var(--ai-surface-alt);
    color: var(--ai-text-secondary);
    border: 1px solid var(--ai-border);
}

.ai-message-content {
    max-width: 72%;
    min-width: 0;
}

.ai-message-bubble {
    padding: 0.75rem 1rem;
    border-radius: var(--ai-radius);
    line-height: 1.6;
    word-wrap: break-word;
    overflow-wrap: break-word;
    font-size: 0.9rem;
}

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

.ai-message-assistant .ai-message-bubble {
    background: var(--ai-surface-alt);
    color: var(--ai-text);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--ai-border-light);
}

.ai-message-assistant .ai-message-bubble p { margin-bottom: 0.5rem; }
.ai-message-assistant .ai-message-bubble p:last-child { margin-bottom: 0; }
.ai-message-assistant .ai-message-bubble pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 0.75rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.82rem;
    margin: 0.5rem 0;
}
.ai-message-assistant .ai-message-bubble code {
    background: rgba(99, 102, 241, 0.08);
    color: var(--ai-primary);
    padding: 0.15rem 0.35rem;
    border-radius: 4px;
    font-size: 0.82em;
}
.ai-message-assistant .ai-message-bubble pre code {
    background: none;
    color: inherit;
    padding: 0;
}

.ai-message-meta {
    display: flex;
    align-items: center;
    margin-top: 0.2rem;
    padding: 0 0.25rem;
}

.ai-message-user .ai-message-meta {
    justify-content: flex-end;
}

.ai-message-time {
    font-size: 0.68rem;
    color: var(--ai-text-muted);
}

.ai-copy-btn {
    font-size: 0.68rem;
    color: var(--ai-text-muted) !important;
    text-decoration: none;
    opacity: 0;
    transition: opacity 0.2s;
}

.ai-message:hover .ai-copy-btn {
    opacity: 1;
}

/* Typing Indicator */

.ai-typing-indicator {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}

.ai-typing-indicator span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ai-text-muted);
    animation: ai-typing 1.4s infinite;
}

.ai-typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes ai-typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.3; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* ========== Input Area ========== */

.ai-input-area {
    padding: 0.75rem 1.25rem 0.5rem;
    background: var(--ai-surface);
    border-top: 1px solid var(--ai-border-light);
    flex-shrink: 0;
}

.ai-input-container {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    max-width: 820px;
    margin: 0 auto;
    background: var(--ai-surface-alt);
    border-radius: var(--ai-radius-lg);
    border: 1px solid var(--ai-border);
    padding: 0.3rem 0.3rem 0.3rem 0;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.ai-input-container:focus-within {
    border-color: var(--ai-primary-light);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.08);
}

.ai-textarea {
    border: none !important;
    background: transparent !important;
    padding: 0.55rem 1rem;
    resize: none;
    max-height: 150px;
    min-height: 40px;
    font-size: 0.9rem;
    line-height: 1.4;
    color: var(--ai-text);
    border-radius: var(--ai-radius-lg) !important;
    overflow-y: auto;
    transition: height 0.1s ease;
}

.ai-textarea:focus {
    box-shadow: none !important;
}

.ai-textarea::placeholder {
    color: var(--ai-text-muted);
}

.ai-send-btn {
    border-radius: 10px !important;
    width: 38px;
    height: 38px;
    min-width: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: var(--ai-primary) !important;
    border: none !important;
    transition: all 0.2s;
}

.ai-send-btn:hover:not(:disabled) {
    background: #4f46e5 !important;
    transform: scale(1.05);
}

.ai-send-btn:disabled {
    background: var(--ai-border) !important;
    opacity: 0.6;
}

.ai-input-hint {
    text-align: center;
    margin-top: 0.25rem;
    margin-bottom: 0;
}

.ai-input-hint small {
    font-size: 0.68rem;
    color: var(--ai-text-muted);
}

/* ========== Responsive ========== */

@media (max-width: 991.98px) {
    .ai-sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 1050;
        width: 280px;
        min-width: 280px;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.1);
    }

    .ai-sidebar:not(.sidebar-visible) {
        margin-left: -280px;
    }

    .ai-assistant-page {
        height: calc(100vh - 56px);
    }
}

@media (max-width: 767.98px) {
    .ai-chat-messages {
        padding: 1rem;
    }

    .ai-message-content {
        max-width: 85%;
    }

    .ai-welcome {
        padding: 1.5rem 1rem;
    }

    .ai-welcome-icon {
        font-size: 2rem;
        width: 52px;
        height: 52px;
    }

    .ai-quick-prompts {
        grid-template-columns: 1fr;
        max-width: 280px;
    }

    .ai-quick-prompt {
        justify-content: center;
    }

    .ai-category-selector .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.72rem;
    }

    .banner-tags {
        display: none;
    }

    .ai-topbar {
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 575.98px) {
    .ai-message-content {
        max-width: 90%;
    }

    .ai-message-bubble {
        padding: 0.6rem 0.8rem;
        font-size: 0.86rem;
    }

    .ai-message-avatar {
        width: 28px;
        height: 28px;
        font-size: 0.8rem;
        border-radius: 8px;
    }

    .ai-textarea {
        font-size: 0.86rem;
    }
}