/* ===== CHATBOT UI ===== */
/* CSS chain: tax-pulse-tokens.css → layout.css → chatbot.css */

/* --- FAB (Floating Action Button) --- */
.chat-fab {
    position: fixed;
    bottom: 20px;
    right: 20px;
    height: 44px;
    border-radius: var(--pulse-radius-pill);
    background: var(--accent-blue);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0 1rem 0 0.75rem;
    font-family: var(--pulse-font-display);
    font-size: 0.88rem;
    font-weight: 600;
    box-shadow: var(--pulse-shadow-sm);
    transition: transform 0.2s var(--pulse-ease), filter 0.2s ease;
    z-index: 900;
}
.chat-fab::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-blue) 55%, transparent);
    animation: chat-fab-pulse 2.2s var(--pulse-ease) infinite;
    pointer-events: none;
}
@keyframes chat-fab-pulse {
    0%   { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-blue) 55%, transparent); }
    70%  { box-shadow: 0 0 0 14px color-mix(in srgb, var(--accent-blue) 0%, transparent); }
    100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-blue) 0%, transparent); }
}
/* Desktop: enhanced glow on FAB */
@media (min-width: 769px) {
    .chat-fab {
        box-shadow: 0 0 16px color-mix(in srgb, var(--accent-blue) 35%, transparent),
                    var(--pulse-shadow-sm);
        animation: chat-fab-glow 2.5s ease-in-out infinite;
    }
    @keyframes chat-fab-glow {
        0%, 100% { box-shadow: 0 0 12px color-mix(in srgb, var(--accent-blue) 30%, transparent), var(--pulse-shadow-sm); }
        50%      { box-shadow: 0 0 24px color-mix(in srgb, var(--accent-blue) 50%, transparent), 0 0 48px color-mix(in srgb, var(--accent-blue) 15%, transparent), var(--pulse-shadow-sm); }
    }
}
.chat-fab.hidden::before,
.chat-fab.scroll-hidden::before { animation: none; }
@media (prefers-reduced-motion: reduce) {
    .chat-fab::before { animation: none; }
    .chat-fab { animation: none; }
}
.chat-fab:hover {
    transform: scale(1.03);
    filter: brightness(1.1);
}
.chat-fab.hidden { display: none; }
.chat-fab.scroll-hidden {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}
.chat-fab svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
}
/* --- Backdrop --- */
.chat-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    z-index: 110;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.chat-backdrop.visible {
    opacity: 1;
    pointer-events: auto;
}

/* --- Panel --- */
.chat-panel {
    position: fixed;
    top: calc(var(--header-height, 64px) + 8px);
    right: 8px;
    bottom: 8px;
    width: 420px;
    max-height: calc(100vh - var(--header-height, 64px) - 16px);
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: var(--pulse-radius-md);
    box-shadow: -8px 0 30px var(--pulse-color-shadow);
    z-index: 120;
    display: flex;
    flex-direction: column;
    transform: translateX(calc(100% + 16px));
    transition: transform 0.3s var(--pulse-ease);
    overflow: hidden;
}
.chat-panel.open {
    transform: translateX(0);
}

/* --- Panel header --- */
.chat-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}
.chat-header-left {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}
.chat-header-title {
    font-family: var(--pulse-font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}
.chat-info-btn {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin-left: 0.15rem;
    transition: color 0.15s ease, background 0.15s ease;
}
.chat-info-btn:hover,
.chat-info-btn.active {
    color: var(--accent-blue);
    background: color-mix(in srgb, var(--accent-blue) 10%, transparent);
}
.chat-info-btn svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.chat-info-popover {
    position: absolute;
    top: calc(100% + 0.6rem);
    left: 0;
    width: 300px;
    max-width: calc(100vw - 2rem);
    background: var(--bg-surface);
    border: 1px solid color-mix(in srgb, var(--border-color) 88%, transparent);
    border-radius: 14px;
    box-shadow: var(--pulse-shadow-md, 0 12px 32px rgba(0, 0, 0, 0.18));
    padding: 1rem 1.1rem;
    font-family: var(--pulse-font-body);
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--text-secondary);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
    z-index: 10;
}
.chat-info-popover.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.chat-info-popover h4 {
    font-family: var(--pulse-font-display);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin: 0 0 0.5rem 0;
}
.chat-info-popover h4:not(:first-child) {
    margin-top: 0.9rem;
}
.chat-info-popover ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.chat-info-popover li {
    position: relative;
    padding-left: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--text-primary);
}
.chat-info-popover li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent-green);
}
.chat-info-popover .soon li::before {
    background: color-mix(in srgb, var(--text-muted) 60%, transparent);
}
.chat-info-popover .soon li {
    color: var(--text-secondary);
}
.chat-header-actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.chat-header-btn {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s ease, color 0.15s ease;
}
.chat-header-btn:hover {
    background: color-mix(in srgb, var(--bg-subtle) 60%, transparent);
    color: var(--text-primary);
}
.chat-header-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* --- Mobile drag handle --- */
.chat-panel-handle {
    display: none;
}

/* --- Message area --- */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
/* When no messages yet, collapse so .chat-welcome gets the full flex space */
.chat-messages:empty {
    display: none;
}

/* --- Welcome state --- */
.chat-welcome {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 1.25rem;
    text-align: center;
}
/* Auto-margins center content when space allows,
   but let it scroll cleanly from top when it doesn't */
.chat-welcome::before,
.chat-welcome::after {
    content: '';
    flex: 1 0 0px;
}
.chat-welcome-icon {
    width: 40px;
    height: 40px;
    color: var(--accent-blue);
    opacity: 0.6;
    flex-shrink: 0;
}
.chat-welcome-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.chat-welcome-text {
    font-family: var(--pulse-font-body);
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 280px;
}
.chat-welcome-scope {
    font-family: var(--pulse-font-body);
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.55;
    max-width: 300px;
}
.chat-welcome-prompts {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    width: 100%;
    max-width: 320px;
    flex-shrink: 0;
}
.chat-welcome-prompt {
    font-family: var(--pulse-font-body);
    font-size: 0.84rem;
    color: var(--text-primary);
    background: var(--bg-surface);
    border: 1px solid color-mix(in srgb, var(--border-color) 88%, transparent);
    border-radius: 12px;
    padding: 0.65rem 0.875rem;
    cursor: pointer;
    text-align: left;
    line-height: 1.4;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.chat-welcome-prompt:hover {
    border-color: color-mix(in srgb, var(--accent-blue) 25%, var(--border-color));
    box-shadow: var(--surface-shadow);
}

/* --- Input area --- */
.chat-input-area {
    padding: 0.875rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background: var(--bg-surface);
    flex-shrink: 0;
}
.chat-input-wrap {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: var(--pulse-radius-sm);
    padding: 0.625rem 0.875rem;
    transition: border-color 0.2s ease;
}
.chat-input-wrap:focus-within {
    border-color: var(--accent-blue);
}
.chat-input {
    flex: 1;
    border: none;
    background: none;
    font-family: var(--pulse-font-body);
    font-size: 0.95rem;
    color: var(--text-primary);
    resize: none;
    max-height: 120px;
    line-height: 1.5;
    outline: none;
    rows: 1;
}
.chat-input::placeholder {
    color: var(--text-muted);
}
.chat-send-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent-blue);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: filter 0.15s ease;
}
.chat-send-btn:hover {
    filter: brightness(1.1);
}
.chat-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
.chat-send-btn svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* --- User message --- */
.msg-user {
    align-self: flex-end;
    max-width: 85%;
    background: var(--accent-blue);
    color: #ffffff;
    padding: 0.75rem 1rem;
    border-radius: 16px 16px 4px 16px;
    font-family: var(--pulse-font-body);
    font-size: 0.92rem;
    line-height: 1.5;
}

/* --- Assistant message --- */
.msg-assistant {
    align-self: flex-start;
    max-width: 92%;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* --- Answer body (card) --- */
.msg-answer {
    background: var(--bg-surface);
    border: 1px solid color-mix(in srgb, var(--border-color) 88%, transparent);
    border-radius: 16px 16px 16px 4px;
    padding: 1rem 1.15rem;
    box-shadow: var(--surface-shadow);
}
.msg-answer p {
    font-family: var(--pulse-font-body);
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}
.msg-answer p:last-child { margin-bottom: 0; }
.msg-answer ul, .msg-answer ol {
    margin: 0.4rem 0 0.6rem 0;
    padding-left: 1.1rem;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-family: var(--pulse-font-body);
}
.msg-answer ul { list-style-type: '–  '; }
.msg-answer li {
    margin-bottom: 0.25rem;
    padding-left: 0.15rem;
}
.msg-answer li:last-child { margin-bottom: 0; }
.msg-answer strong { font-weight: 600; }
.msg-answer a {
    color: var(--accent-blue);
    text-decoration: none;
}
.msg-answer a:hover { text-decoration: underline; }

/* --- Feedback (thumbs up/down) --- */
.msg-feedback {
    padding: 0 0.25rem;
}
.msg-feedback-btns {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}
.msg-feedback-btn {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.msg-feedback-btn:hover {
    background: color-mix(in srgb, var(--bg-subtle) 60%, transparent);
    color: var(--text-secondary);
}
.msg-feedback-btn.selected.helpful {
    color: var(--accent-green);
    background: color-mix(in srgb, var(--accent-green) 10%, transparent);
}
.msg-feedback-btn.selected.unhelpful {
    color: var(--accent-red);
    background: color-mix(in srgb, var(--accent-red) 10%, transparent);
}
.msg-feedback-btn svg {
    width: 14px;
    height: 14px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Comment form (appears on thumbs-down) */
.msg-feedback-comment {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    margin-top: 0.4rem;
}
.msg-feedback-comment.open {
    display: flex;
}
.msg-feedback-textarea {
    width: 100%;
    min-height: 52px;
    max-height: 100px;
    padding: 0.4rem 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-surface);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.78rem;
    line-height: 1.4;
    resize: vertical;
    outline: none;
    transition: border-color 0.15s ease;
}
.msg-feedback-textarea:focus {
    border-color: var(--accent-blue);
}
.msg-feedback-textarea::placeholder {
    color: var(--text-muted);
}
.msg-feedback-submit {
    align-self: flex-end;
    padding: 0.25rem 0.75rem;
    border: none;
    border-radius: 6px;
    background: var(--accent-blue);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.15s ease;
}
.msg-feedback-submit:hover {
    opacity: 0.85;
}
.msg-feedback-thanks {
    font-size: 0.75rem;
    color: var(--text-muted);
    padding: 0.2rem 0;
}
.msg-feedback-comment.submitted {
    display: flex;
}

/* --- Reasoning summary (collapsible) --- */
.msg-reasoning-wrap {
    margin-top: 0.75rem;
    padding-top: 0.6rem;
    border-top: 1px solid color-mix(in srgb, var(--border-color) 60%, transparent);
}
.msg-reasoning-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--pulse-font-body);
    font-size: 0.78rem;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.15rem 0;
    transition: color 0.15s ease;
}
.msg-reasoning-toggle:hover {
    color: var(--text-secondary);
}
.msg-reasoning-label {
    font-weight: 600;
}
.msg-reasoning-chevron {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.2s ease;
}
.msg-reasoning-wrap.expanded .msg-reasoning-chevron {
    transform: rotate(180deg);
}
.msg-reasoning-body {
    font-family: var(--pulse-font-body);
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.55;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, margin 0.25s ease;
    margin-top: 0;
}
.msg-reasoning-wrap.expanded .msg-reasoning-body {
    max-height: 300px;
    margin-top: 0.35rem;
}

/* --- Citations (collapsible, right-aligned) --- */
.msg-citations-wrap {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding: 0 0.25rem;
}
.msg-citations-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--pulse-font-body);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.15rem 0;
    transition: color 0.15s ease;
}
.msg-citations-toggle:hover {
    color: var(--text-secondary);
}
.msg-citations-label {
    font-weight: 600;
}
.msg-citations-chevron {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: transform 0.2s ease;
}
.msg-citations-wrap.expanded .msg-citations-chevron {
    transform: rotate(180deg);
}
.msg-citations {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    justify-content: flex-end;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease, margin 0.25s ease;
    margin-top: 0;
}
.msg-citations-wrap.expanded .msg-citations {
    max-height: 200px;
    margin-top: 0.4rem;
}
.msg-cite {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--pulse-font-body);
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: color-mix(in srgb, var(--bg-subtle) 60%, transparent);
    padding: 0.25rem 0.65rem;
    border-radius: var(--pulse-radius-pill);
    text-decoration: none;
    transition: background 0.15s ease;
}
a.msg-cite:hover {
    background: var(--accent-blue-soft);
    color: var(--accent-blue);
}
.msg-cite-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}
.msg-cite-dot.internal { background: var(--accent-blue); }
.msg-cite-dot.official { background: var(--accent-green); }
.msg-cite-dot.dataset { background: var(--text-muted); }
.msg-cite-date {
    font-family: var(--pulse-font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
}

/* --- Confidence badge --- */
.msg-confidence {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--pulse-font-body);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.2rem 0.6rem;
    border-radius: var(--pulse-radius-pill);
}
.msg-confidence.high {
    background: color-mix(in srgb, var(--accent-green) 12%, transparent);
    color: var(--accent-green);
}
.msg-confidence.medium {
    background: var(--accent-blue-soft);
    color: var(--accent-blue);
}
.msg-confidence.low {
    background: color-mix(in srgb, var(--text-muted) 12%, transparent);
    color: var(--text-muted);
}

/* --- Next actions --- */
.msg-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0 0.25rem;
}
.msg-action-btn {
    font-family: var(--pulse-font-body);
    font-size: 0.82rem;
    color: var(--accent-blue);
    background: var(--accent-blue-soft);
    border: 1px solid color-mix(in srgb, var(--accent-blue) 15%, transparent);
    padding: 0.45rem 0.85rem;
    border-radius: var(--pulse-radius-pill);
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
    text-align: left;
    line-height: 1.4;
}
.msg-action-btn:hover {
    background: color-mix(in srgb, var(--accent-blue) 15%, transparent);
    border-color: color-mix(in srgb, var(--accent-blue) 30%, transparent);
}

/* --- Disclaimer --- */
.msg-disclaimer {
    font-family: var(--pulse-font-body);
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.5;
    padding: 0 0.25rem;
    font-style: italic;
}

/* --- Out of scope / refused --- */
.msg-scope {
    font-family: var(--pulse-font-body);
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 0.5rem 0;
}

/* --- Loading: searching indicator --- */
.msg-searching {
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--pulse-font-body);
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 0.5rem 0;
}
.msg-searching-dots {
    display: flex;
    gap: 0.2rem;
}

/* --- Loading: typing dots --- */
.msg-typing {
    align-self: flex-start;
    background: var(--bg-surface);
    border: 1px solid color-mix(in srgb, var(--border-color) 88%, transparent);
    border-radius: 16px 16px 16px 4px;
    padding: 0.875rem 1.15rem;
    display: flex;
    gap: 0.3rem;
}
.msg-typing-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: chatPulseDot 1.4s infinite;
}
.msg-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.msg-typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes chatPulseDot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* --- Error message --- */
.msg-error {
    font-family: var(--pulse-font-body);
    font-size: 0.88rem;
    color: var(--accent-red);
    background: color-mix(in srgb, var(--accent-red) 8%, var(--bg-surface));
    border-radius: 12px;
    padding: 0.875rem 1rem;
    line-height: 1.5;
    align-self: flex-start;
}

/* --- Mobile: bottom sheet --- */
@media (max-width: 768px) {
    .chat-panel {
        width: 100%;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        height: 100%;
        max-height: 100vh;
        border: none;
        border-radius: 0;
        z-index: 200;
        transform: translateY(100%);
    }
    .chat-panel.open {
        transform: translateY(0);
    }
    .chat-backdrop {
        z-index: 199;
    }
    .chat-panel-handle {
        display: block;
        width: 36px;
        height: 4px;
        border-radius: 2px;
        background: var(--border-color);
        margin: 8px auto 0;
        flex-shrink: 0;
    }
    .chat-fab {
        bottom: 16px;
        right: 16px;
        height: 40px;
        font-size: 0.82rem;
        padding: 0 0.85rem 0 0.65rem;
    }
    .msg-user { max-width: 88%; }
    .msg-assistant { max-width: 96%; }
}