/**
 * TASK-MONITOR Framework — AI Assistants Shared Design System
 * PHP Version 8.3
 * @author Daniel Bernat <daniel.bernat@hk-press.cz>
 *
 * Unified look for all four AI assistants:
 *   - Console (full-page)
 *   - Table Helper (floating widget)
 *   - Form Helper (floating widget)
 *   - Companion (header icon + floating dialog)
 *
 * Uses CSS custom properties — override :root values to theme.
 */

/* ── Design Tokens ─────────────────────────────────────────────────── */
:root {
    /* Primary palette */
    --ai-primary: #667eea;
    --ai-primary-dark: #764ba2;
    --ai-gradient: linear-gradient(135deg, var(--ai-primary), var(--ai-primary-dark));
    --ai-gradient-hover: linear-gradient(135deg, #5a6fd6, #6a3f96);

    /* Message role colors */
    --ai-user-msg-bg: var(--ai-gradient);
    --ai-user-msg-color: #ffffff;
    --ai-agent-msg-bg: #ffffff;
    --ai-agent-msg-border: #28a745;
    --ai-system-msg-bg: #fff3e0;
    --ai-system-msg-border: #ff9800;
    --ai-system-msg-color: #d84315;
    --ai-error-msg-bg: #ffebee;
    --ai-error-msg-border: #dc3545;

    /* Surfaces */
    --ai-chat-bg: #f8f9fa;
    --ai-surface: #ffffff;
    --ai-surface-border: #e0e0e0;
    --ai-input-border: #dee2e6;
    --ai-input-focus-border: var(--ai-primary);

    /* Typography */
    --ai-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --ai-title-size: 16px;
    --ai-subtitle-size: 12px;
    --ai-msg-size: 14px;
    --ai-input-size: 14px;

    /* Spacing */
    --ai-header-padding: 16px 20px;
    --ai-msg-padding: 12px 16px;
    --ai-input-padding: 12px 14px;
    --ai-msg-gap: 12px;
    --ai-input-gap: 8px;

    /* Border radius */
    --ai-radius-lg: 12px;
    --ai-radius-md: 8px;
    --ai-radius-sm: 4px;
    --ai-radius-round: 50%;

    /* Shadows */
    --ai-shadow-widget: 0 10px 40px rgba(0, 0, 0, 0.2);
    --ai-shadow-msg: 0 2px 4px rgba(0, 0, 0, 0.05);
    --ai-shadow-user-msg: 0 2px 8px rgba(102, 126, 234, 0.3);

    /* Transitions */
    --ai-transition: 0.2s ease;
    --ai-transition-open: 0.3s ease;

    /* Floating widget dimensions */
    --ai-widget-width: 420px;
    --ai-widget-height: 600px;
    --ai-widget-min-width: 320px;
    --ai-widget-min-height: 340px;
}

/* ── Floating Widget Container ─────────────────────────────────────── */
.ai-floating-widget {
    position: fixed;
    z-index: 9999;
    width: var(--ai-widget-width);
    height: var(--ai-widget-height);
    min-width: var(--ai-widget-min-width);
    min-height: var(--ai-widget-min-height);
    background: var(--ai-surface);
    border-radius: var(--ai-radius-lg);
    box-shadow: var(--ai-shadow-widget);
    font-family: var(--ai-font);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-sizing: border-box;
    transition: transform var(--ai-transition-open), opacity var(--ai-transition-open);
    transform: translateY(20px);
    opacity: 0;
}

.ai-floating-widget.ai-open {
    transform: translateY(0);
    opacity: 1;
}

.ai-floating-widget.ai-resizable {
    overflow: visible;  /* resize handles extend outside */
}

/* ── Header ────────────────────────────────────────────────────────── */
.ai-header {
    background: var(--ai-gradient);
    color: var(--ai-user-msg-color);
    padding: var(--ai-header-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: grab;
    border-radius: var(--ai-radius-lg) var(--ai-radius-lg) 0 0;
    flex-shrink: 0;
    user-select: none;
}

/* Full-page Console header — only top corners rounded */
.ai-console-layout .ai-header {
    border-radius: var(--ai-radius-md) var(--ai-radius-md) 0 0;
}

.ai-header-title {
    font-size: var(--ai-title-size);
    font-weight: 600;
    line-height: 1.3;
}

.ai-header-subtitle {
    font-size: var(--ai-subtitle-size);
    opacity: 0.8;
    margin-top: 2px;
    font-weight: 400;
}

.ai-header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.ai-header-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: var(--ai-radius-round);
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--ai-transition);
    padding: 0;
    line-height: 1;
}

.ai-header-btn:hover {
    background: rgba(255, 255, 255, 0.35);
}

.ai-header-btn.ai-close-btn {
    font-size: 20px;
}

/* ── Chat Body / Messages ──────────────────────────────────────────── */
.ai-chat-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--ai-msg-padding);
    background: var(--ai-chat-bg);
    display: flex;
    flex-direction: column;
    gap: var(--ai-msg-gap);
    min-height: 0;
}

/* ── Message Bubbles ───────────────────────────────────────────────── */
.ai-msg {
    padding: var(--ai-msg-padding);
    border-radius: var(--ai-radius-md);
    max-width: 85%;
    line-height: 1.5;
    font-size: var(--ai-msg-size);
    word-wrap: break-word;
}

.ai-msg a {
    color: var(--ai-primary);
    font-weight: 500;
}

.ai-msg strong {
    font-weight: 600;
}

/* User message — gradient, right-aligned */
.ai-msg-user {
    background: var(--ai-user-msg-bg);
    color: var(--ai-user-msg-color);
    border-radius: var(--ai-radius-lg) var(--ai-radius-lg) var(--ai-radius-sm) var(--ai-radius-lg);
    align-self: flex-end;
    box-shadow: var(--ai-shadow-user-msg);
    max-width: 80%;
}

/* Agent message — white, green left border */
.ai-msg-agent {
    background: var(--ai-agent-msg-bg);
    border-left: 4px solid var(--ai-agent-msg-border);
    align-self: flex-start;
    box-shadow: var(--ai-shadow-msg);
}

/* System / warning message — orange */
.ai-msg-system {
    background: var(--ai-system-msg-bg);
    border-left: 4px solid var(--ai-system-msg-border);
    align-self: center;
    font-size: 13px;
    color: var(--ai-system-msg-color);
    max-width: 90%;
}

/* Error message — red */
.ai-msg-error {
    background: var(--ai-error-msg-bg);
    border-left: 4px solid var(--ai-error-msg-border);
    align-self: flex-start;
    color: #721c24;
    max-width: 90%;
}

/* Loading indicator */
.ai-msg-loading {
    background: var(--ai-surface);
    border-left: 4px solid var(--ai-system-msg-border);
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 10px;
    font-style: italic;
    color: #666;
}

.ai-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--ai-primary);
    border-radius: 50%;
    animation: ai-spin 1s linear infinite;
}

@keyframes ai-spin {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ── Quick Chips ───────────────────────────────────────────────────── */
.ai-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 4px 0;
    align-self: flex-start;
    max-width: 80%;
}

.ai-chip {
    background: #f0f2ff;
    border: 1px solid #d0d5f7;
    border-radius: 16px;
    padding: 6px 14px;
    cursor: pointer;
    font-size: 12px;
    color: var(--ai-primary);
    font-weight: 500;
    transition: all var(--ai-transition);
    white-space: nowrap;
    font-family: var(--ai-font);
}

.ai-chip:hover {
    background: var(--ai-primary);
    color: #fff;
    border-color: var(--ai-primary);
}

/* ── Input Area ────────────────────────────────────────────────────── */
.ai-input-area {
    padding: var(--ai-input-padding);
    background: var(--ai-surface);
    border-top: 1px solid var(--ai-surface-border);
    display: flex;
    gap: var(--ai-input-gap);
    flex-shrink: 0;
}

.ai-input {
    flex: 1;
    border: 1px solid var(--ai-input-border);
    border-radius: var(--ai-radius-md);
    padding: 10px 12px;
    resize: none;
    font-size: var(--ai-input-size);
    font-family: var(--ai-font);
    outline: none;
    transition: border-color var(--ai-transition);
    min-height: 44px;
    max-height: 120px;
    line-height: 1.4;
}

.ai-input:focus {
    border-color: var(--ai-input-focus-border);
}

.ai-input::placeholder {
    color: #999;
}

.ai-send-btn {
    background: var(--ai-gradient);
    color: #fff;
    border: none;
    border-radius: var(--ai-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    transition: opacity var(--ai-transition);
    font-size: 18px;
}

.ai-send-btn:hover {
    opacity: 0.9;
}

.ai-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ── Quick Action Buttons (Table Helper toolbar) ───────────────────── */
.ai-quick-actions {
    padding: 0 16px 12px;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    flex-shrink: 0;
}

.ai-quick-action {
    flex: 1;
    min-width: 70px;
    padding: 7px 10px;
    background: var(--ai-surface);
    border: 1px solid var(--ai-input-border);
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all var(--ai-transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    font-family: var(--ai-font);
    white-space: nowrap;
}

.ai-quick-action:hover {
    background: #f0f2ff;
    border-color: var(--ai-primary);
    color: var(--ai-primary);
}

.ai-quick-action:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* ── Plan Sidebar ──────────────────────────────────────────────────── */
.ai-plan {
    display: none;
    background: var(--ai-surface);
    border-radius: var(--ai-radius-md);
    padding: 10px 14px;
    border-left: 4px solid var(--ai-primary);
    box-shadow: var(--ai-shadow-msg);
    flex-shrink: 0;
    margin: 0 14px 8px;
}

.ai-plan.ai-plan-visible {
    display: block;
}

.ai-plan-title {
    font-size: 13px;
    font-weight: 600;
    color: #333;
}

.ai-plan-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.ai-plan-steps {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.ai-plan-step {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    padding: 2px 0;
}

.ai-plan-step .step-check { flex-shrink: 0; }
.ai-plan-step .step-label { line-height: 1.3; }

/* ── Filter Confirmation Card ──────────────────────────────────────── */
.ai-filter-confirm {
    background: var(--ai-surface);
    border-radius: var(--ai-radius-md);
    padding: var(--ai-msg-padding);
    border-left: 4px solid var(--ai-system-msg-border);
    align-self: flex-start;
    max-width: 85%;
    box-shadow: var(--ai-shadow-msg);
    font-size: var(--ai-msg-size);
    color: #666;
    line-height: 1.5;
}

.ai-filter-confirm button {
    flex: 1;
    min-width: 130px;
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: var(--ai-msg-size);
    font-weight: 500;
    font-family: var(--ai-font);
}

.ai-btn-apply {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: #fff;
}

.ai-btn-continue {
    background: #6c757d;
    color: #fff;
}

.ai-btn-reload {
    background: var(--ai-gradient);
    color: #fff;
}

.ai-filter-confirm .ai-confirm-buttons {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

/* ── Queue Action Cards (Console sidebar) ──────────────────────────── */
.ai-action-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.ai-action-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.ai-action-badge {
    color: white;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: bold;
}

.ai-action-badge-comment  { background: #17a2b8; }
.ai-action-badge-task     { background: #28a745; }
.ai-action-badge-update   { background: #ffc107; }
.ai-action-badge-unknown  { background: #6c757d; }

.ai-action-date {
    font-size: 11px;
    color: #888;
}

.ai-action-body {
    font-size: 13px;
    color: #444;
    margin-bottom: 10px;
}

.ai-action-detail {
    background: #f8f9fa;
    padding: 8px;
    border-radius: 4px;
    font-size: 13px;
    margin-top: 5px;
}

.ai-action-buttons {
    display: flex;
    gap: 8px;
}

.ai-action-btn-approve {
    flex: 1;
    background: #28a745;
    color: white;
    border: none;
    padding: 6px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
}

.ai-action-btn-reject {
    flex: 1;
    background: #dc3545;
    color: white;
    border: none;
    padding: 6px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
}

.ai-queue-empty {
    color: #666;
    font-style: italic;
    text-align: center;
    padding: 20px;
}

/* ── Resize Handles (floating widgets) ─────────────────────────────── */
.ai-resize-handle {
    position: absolute;
    z-index: 10001;
}

.ai-resize-handle[data-dir="n"]  { top: -4px;    left: 12px;  right: 12px;  height: 8px;    cursor: n-resize; }
.ai-resize-handle[data-dir="s"]  { bottom: -4px; left: 12px;  right: 12px;  height: 8px;    cursor: s-resize; }
.ai-resize-handle[data-dir="e"]  { right: -4px;  top: 12px;   bottom: 12px; width: 8px;     cursor: e-resize; }
.ai-resize-handle[data-dir="w"]  { left: -4px;   top: 12px;   bottom: 12px; width: 8px;     cursor: w-resize; }
.ai-resize-handle[data-dir="ne"] { top: -4px;    right: -4px;  width: 16px;  height: 16px;   cursor: ne-resize; border-radius: 0 12px 0 0; }
.ai-resize-handle[data-dir="nw"] { top: -4px;    left: -4px;   width: 16px;  height: 16px;   cursor: nw-resize; border-radius: 12px 0 0 0; }
.ai-resize-handle[data-dir="se"] { bottom: -4px; right: -4px;  width: 16px;  height: 16px;   cursor: se-resize; border-radius: 0 0 12px 0; }
.ai-resize-handle[data-dir="sw"] { bottom: -4px; left: -4px;   width: 16px;  height: 16px;   cursor: sw-resize; border-radius: 0 0 0 12px; }

/* ── Console Layout (full-page) ────────────────────────────────────── */
.ai-console-layout {
    display: flex;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    font-family: var(--ai-font);
    height: 85vh;
}

.ai-console-chat {
    flex: 2;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.ai-console-chat .ai-chat-body {
    border: 1px solid var(--ai-surface-border);
    border-radius: var(--ai-radius-md);
    background: var(--ai-surface);
    box-shadow: var(--ai-shadow-msg);
    margin-bottom: 20px;
    padding: 20px;
}

.ai-console-sidebar {
    flex: 1;
    background: #f5f5f5;
    padding: 20px;
    border-radius: var(--ai-radius-md);
    border: 1px solid var(--ai-surface-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    min-width: 250px;
}

.ai-console-sidebar h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: #333;
    border-bottom: 2px solid #ddd;
    padding-bottom: 10px;
    font-size: 16px;
}

/* ── Console Window (draggable iframe) ─────────────────────────────── */
.ai-console-window {
    position: fixed;
    top: 60px;
    left: 80px;
    width: 1024px;
    height: 700px;
    min-width: 400px;
    min-height: 300px;
    background: var(--ai-surface);
    border-radius: var(--ai-radius-md);
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
    z-index: 99990;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: both;
}

.ai-console-window .ai-header {
    flex-shrink: 0;
}

.ai-console-iframe {
    flex: 1;
    border: 0;
    width: 100%;
}

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --ai-widget-width: calc(100vw - 20px);
        --ai-widget-height: 70vh;
        --ai-widget-min-width: 280px;
        --ai-widget-min-height: 300px;
    }

    .ai-console-layout {
        flex-direction: column;
        height: auto;
    }

    .ai-console-sidebar {
        min-width: 0;
    }

    .ai-console-window {
        top: 10px;
        left: 10px;
        width: calc(100vw - 20px);
        height: calc(100vh - 20px);
        min-width: 300px;
        min-height: 300px;
    }
}

/* ═══════════════════════════════════════════════════════
   AI Companion — Header Icon + Floating Dialog
   ═══════════════════════════════════════════════════════ */

/* Header icon (matches .appHealthButton pattern from scripts.js) */
.aiCompanionButton {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 13px;
    color: inherit;
    cursor: pointer;
    margin-left: 8px;
    position: relative;
    vertical-align: middle;
    transition: color 0.2s ease;
}
.aiCompanionButton:hover {
    color: #667eea;
}

/* Pulse indicator — shows when companion has pending plan */
.aiCompanionPulse {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ff4757;
    border: 1px solid #fff;
    animation: aiCompanionPulseAnim 1.5s ease-in-out infinite;
}
@keyframes aiCompanionPulseAnim {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.3); }
}

/* Floating dialog — compact chat window */
.ai-companion-dialog {
    position: fixed;
    top: 60px;
    right: 20px;
    width: 420px;
    max-width: calc(100vw - 40px);
    height: 520px;
    max-height: calc(100vh - 100px);
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18), 0 2px 8px rgba(0, 0, 0, 0.1);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    overflow: hidden;
    animation: aiCompanionSlideIn 0.25s ease-out;
}
@keyframes aiCompanionSlideIn {
    from { opacity: 0; transform: translateY(-12px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Header bar */
.ai-companion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}
.ai-companion-title i {
    margin-right: 6px;
}
.ai-companion-close {
    cursor: pointer;
    font-size: 18px;
    opacity: 0.8;
    transition: opacity 0.2s;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
.ai-companion-close:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.15);
}

/* Messages area — reuses ai-msg classes */
.ai-companion-messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.ai-companion-messages .ai-msg {
    max-width: 82%;
    padding: 7px 11px;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.45;
    word-wrap: break-word;
}
.ai-companion-messages .ai-msg-user {
    align-self: flex-end;
    background: #667eea;
    color: #fff;
    border-bottom-right-radius: 3px;
}
.ai-companion-messages .ai-msg-agent {
    align-self: flex-start;
    background: #f1f3f5;
    color: #222;
    border-bottom-left-radius: 3px;
}
.ai-companion-messages .ai-msg-system {
    align-self: center;
    background: #fff3cd;
    color: #856404;
    font-size: 12px;
    max-width: 95%;
    text-align: center;
    border-radius: 8px;
}
.ai-companion-messages .ai-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 2px 0;
}
.ai-companion-messages .ai-chip {
    display: inline-block;
    padding: 4px 10px;
    background: #e8edf5;
    border: 1px solid #c8d6e5;
    border-radius: 14px;
    font-size: 12px;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    color: #333;
}
.ai-companion-messages .ai-chip:hover {
    background: #667eea;
    color: #fff;
    border-color: #667eea;
}

/* Input row */
.ai-companion-input-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-top: 1px solid #e9ecef;
    flex-shrink: 0;
}
.ai-companion-textarea {
    flex: 1;
    border: 1px solid #dee2e6;
    border-radius: 20px;
    padding: 8px 14px;
    font-size: 13px;
    font-family: inherit;
    resize: none;
    outline: none;
    max-height: 100px;
    line-height: 1.4;
    transition: border-color 0.2s;
}
.ai-companion-textarea:focus {
    border-color: #667eea;
}
.ai-companion-send {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, box-shadow 0.2s;
}
.ai-companion-send:hover {
    transform: scale(1.08);
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}
.ai-companion-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* NAV chip — direct navigation link, rendered as <a href> */
.ai-nav-chip {
    border-style: dashed !important;
    cursor: pointer !important;
}
.ai-nav-chip:hover {
    background: #27ae60 !important;
    color: #fff !important;
    border-color: #27ae60 !important;
}