/**
 * Census Chat Panel Styles
 *
 * ARCHITECTURE: Slide-out chat panel with FAB trigger for census dashboard
 * WHY: Provides AI assistant access without disrupting clinical workflow
 * TRADEOFF: Overlay panel vs embedded - chose overlay for minimal UI disruption
 *
 * NOTE: Extends base chat.css styles for message bubbles and RAG panel
 *
 * CREATED: 2026-01-08 - Census Chat Panel Feature
 */

/* =========================================================================
   FAB (Floating Action Button)
   ========================================================================= */

.chat-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-500, #3b82f6);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    z-index: 1000;
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-fab:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
}

.chat-fab:active {
    transform: scale(0.98);
}

.chat-fab:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-200, rgba(59, 130, 246, 0.3));
}

.chat-fab.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.8);
}

.chat-fab svg {
    width: 24px;
    height: 24px;
}

/* Unread badge */
.chat-fab-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    background: var(--error-500, #ef4444);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* =========================================================================
   Backdrop
   ========================================================================= */

.census-chat-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 9998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.census-chat-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
}

/* =========================================================================
   Panel Container
   ========================================================================= */

.census-chat-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 420px;
    max-width: 100vw;
    height: 100vh;
    background: var(--bg-primary, #ffffff);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.2);
    z-index: 9999;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}

.census-chat-panel.visible {
    transform: translateX(0);
}

.chat-panel-content {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

/* =========================================================================
   Header
   ========================================================================= */

.chat-panel-header {
    flex-shrink: 0;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    background: var(--bg-secondary, #f9fafb);
}

.chat-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.chat-panel-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chat-panel-title svg {
    color: var(--primary-500, #3b82f6);
}

.chat-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chat-header-actions button {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary, #6b7280);
    transition: all 0.15s ease;
}

.chat-header-actions button:hover {
    background: var(--bg-tertiary, #f3f4f6);
    color: var(--text-primary, #111827);
}

.chat-header-actions button.active {
    background: var(--primary-100, #dbeafe);
    color: var(--primary-600, #2563eb);
}

.chat-panel-close:hover {
    background: var(--error-100, #fee2e2) !important;
    color: var(--error-600, #dc2626) !important;
}

/* Patient context badge */
.chat-patient-context {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.chat-context-label {
    color: var(--text-tertiary, #9ca3af);
}

.chat-context-patient {
    color: var(--text-primary, #111827);
    font-weight: 500;
    background: var(--primary-50, #eff6ff);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* =========================================================================
   Body (Messages + RAG Panel)
   ========================================================================= */

.chat-panel-body {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.chat-panel-body.with-rag {
    /* Split layout when RAG panel is open */
}

.chat-messages-wrapper {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    scroll-behavior: smooth;
}

/* =========================================================================
   Messages (extends chat.css)
   ========================================================================= */

.chat-welcome {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-secondary, #6b7280);
}

.chat-welcome svg {
    margin-bottom: 1rem;
    color: var(--primary-300, #93c5fd);
}

.chat-welcome h3 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
    color: var(--text-primary, #111827);
}

.chat-welcome p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.5;
}

.chat-message {
    margin-bottom: 1rem;
    animation: slideUp 0.3s ease;
}

.chat-message.user {
    display: flex;
    justify-content: flex-end;
}

.chat-message.assistant {
    display: flex;
    justify-content: flex-start;
}

.message-bubble {
    max-width: 85%;
    padding: 0.75rem 1rem;
    border-radius: 16px;
    word-wrap: break-word;
    line-height: 1.5;
    font-size: 0.9375rem;
}

.chat-message.user .message-bubble {
    background: var(--primary-500, #3b82f6);
    color: white;
    border-bottom-right-radius: 4px;
}

.chat-message.assistant .message-bubble {
    background: var(--bg-secondary, #f9fafb);
    color: var(--text-primary, #111827);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border-color, #e5e7eb);
}

.message-bubble.streaming {
    border-color: var(--primary-300, #93c5fd);
}

/* Markdown in messages */
.message-bubble pre {
    background: var(--bg-tertiary, #f3f4f6);
    border-radius: 6px;
    padding: 0.75rem;
    margin: 0.5rem 0;
    overflow-x: auto;
}

.message-bubble code {
    background: var(--bg-tertiary, #f3f4f6);
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    font-size: 0.875rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.message-bubble h2,
.message-bubble h3,
.message-bubble h4 {
    margin: 0.75rem 0 0.5rem;
}

.message-bubble ul {
    margin: 0.5rem 0;
    padding-left: 1.25rem;
}

/* Typing indicator */
.typing-indicator {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary, #f9fafb);
    border-radius: 16px;
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border-color, #e5e7eb);
}

.typing-indicator span {
    height: 8px;
    width: 8px;
    background: var(--text-tertiary, #9ca3af);
    border-radius: 50%;
    display: inline-block;
    margin: 0 2px;
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.5;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-6px);
    }
}

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

/* =========================================================================
   RAG Panel
   ========================================================================= */

.chat-rag-panel {
    width: 0;
    overflow: hidden;
    background: var(--bg-secondary, #f9fafb);
    border-left: 1px solid var(--border-color, #e5e7eb);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
}

.chat-rag-panel.expanded {
    width: 280px;
}

.chat-rag-panel.collapsed {
    width: 0;
}

.rag-panel-header {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color, #e5e7eb);
    background: var(--bg-tertiary, #f3f4f6);
}

.rag-panel-header h4 {
    margin: 0;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.rag-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
}

.rag-document-item {
    background: var(--bg-primary, #ffffff);
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.rag-document-item:hover {
    border-color: var(--primary-500, #3b82f6);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.rag-doc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.rag-doc-source {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary, #111827);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.rag-similarity-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    flex-shrink: 0;
}

.rag-similarity-badge.high {
    background: var(--success-100, #dcfce7);
    color: var(--success-700, #15803d);
}

.rag-similarity-badge.medium {
    background: var(--warning-100, #fef3c7);
    color: var(--warning-700, #b45309);
}

.rag-similarity-badge.low {
    background: var(--bg-tertiary, #f3f4f6);
    color: var(--text-secondary, #6b7280);
}

.rag-doc-preview {
    font-size: 0.75rem;
    color: var(--text-secondary, #6b7280);
    line-height: 1.4;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.rag-doc-meta {
    font-size: 0.7rem;
}

.rag-doc-link {
    color: var(--primary-600, #2563eb);
    font-weight: 500;
}

.rag-empty-state {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-tertiary, #9ca3af);
}

.rag-empty-state svg {
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.rag-empty-state p {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.4;
}

/* =========================================================================
   Footer (Input Area)
   ========================================================================= */

.chat-panel-footer {
    flex-shrink: 0;
    padding: 1rem;
    /* ARCHITECTURE: Extra bottom padding for dictation UI compatibility
       WHY: Voice dictation software overlays often appear at screen bottom
       TRADEOFF: Slightly taller footer vs. input obscured by dictation bar
       NOTE: Safe area inset handles iOS notch/home indicator */
    padding-bottom: calc(1rem + env(safe-area-inset-bottom, 16px));
    border-top: 1px solid var(--border-color, #e5e7eb);
    background: var(--bg-secondary, #f9fafb);
}

.chat-input-container {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    resize: none;
    border: 1px solid var(--border-color, #e5e7eb);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #111827);
    transition: all 0.2s ease;
    max-height: 120px;
    font-family: inherit;
    line-height: 1.5;
}

.chat-input:focus {
    outline: none;
    border-color: var(--primary-500, #3b82f6);
    box-shadow: 0 0 0 3px var(--primary-100, rgba(59, 130, 246, 0.15));
}

.chat-input::placeholder {
    color: var(--text-tertiary, #9ca3af);
}

.chat-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.chat-send-btn {
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--primary-500, #3b82f6);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.chat-send-btn:hover:not(:disabled) {
    background: var(--primary-600, #2563eb);
}

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

.chat-send-btn svg.spin {
    animation: spin 1s linear infinite;
}

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

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

@media (max-width: 768px) {
    .census-chat-panel {
        width: 100vw;
    }

    .chat-fab {
        bottom: 80px; /* Above mobile nav if present */
        right: 16px;
    }

    /* ARCHITECTURE: Increased footer padding on mobile for dictation bars
       WHY: Mobile dictation UIs (iOS, Android) overlap bottom of screen
       TRADEOFF: More vertical space used vs. accessible text input */
    .chat-panel-footer {
        padding-bottom: calc(1.5rem + env(safe-area-inset-bottom, 24px));
    }

    .chat-rag-panel.expanded {
        position: absolute;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 40vh;
        border-left: none;
        border-top: 1px solid var(--border-color, #e5e7eb);
    }
}

/* =========================================================================
   Dark Mode
   ========================================================================= */

@media (prefers-color-scheme: dark) {
    .census-chat-panel {
        background: var(--bg-primary, #1f2937);
    }

    .chat-panel-header,
    .chat-panel-footer {
        background: var(--bg-secondary, #111827);
    }

    .message-bubble {
        background: var(--bg-secondary, #374151);
        color: var(--text-primary, #f9fafb);
    }

    .chat-message.user .message-bubble {
        background: var(--primary-600, #2563eb);
    }

    .chat-input {
        background: var(--bg-tertiary, #374151);
        border-color: var(--border-color, #4b5563);
        color: var(--text-primary, #f9fafb);
    }

    .rag-document-item {
        background: var(--bg-tertiary, #374151);
        border-color: var(--border-color, #4b5563);
    }
}