/* ============================================
   Chat Features — Artifact Panel + Context Bar
   ============================================ */

/* --- Context Bar (below topbar) --- */
.chat-context-bar {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-2) var(--space-4);
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    font-size: 0.75rem;
    min-height: 36px;
}

.ctx-meter {
    flex: 1;
    max-width: 200px;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.ctx-meter-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width var(--transition);
}

.ctx-meter-fill.ok { background: var(--green); }
.ctx-meter-fill.warn { background: #F59E0B; }
.ctx-meter-fill.danger { background: var(--red); }

.ctx-label {
    color: var(--text-muted);
    font-family: var(--font-mono);
    white-space: nowrap;
}

.ctx-cost {
    color: var(--accent);
    font-family: var(--font-mono);
    font-weight: 500;
    white-space: nowrap;
}

.ctx-breakdown {
    display: flex;
    gap: var(--space-3);
    color: var(--text-muted);
}

.ctx-breakdown span {
    display: flex;
    align-items: center;
    gap: 3px;
}

.ctx-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.ctx-dot-system { background: #8B5CF6; }
.ctx-dot-user { background: #3B82F6; }
.ctx-dot-assistant { background: #10B981; }

/* --- Pre-send estimate --- */
.chat-send-estimate {
    font-size: 0.6875rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    padding: var(--space-1) 0;
    text-align: right;
}

.chat-send-estimate.warn {
    color: #F59E0B;
}

/* --- Artifact Panel (side view) --- */
.chat-with-panel {
    display: flex;
    flex: 1;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    position: relative;
}

.chat-with-panel .chat-messages {
    flex: 1;
    min-width: 0;
}

.artifact-panel {
    width: 50%;
    min-width: 420px;
    max-width: 60vw;
    border-left: 1px solid var(--border);
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    animation: slide-in-right 0.2s ease;
}

@keyframes slide-in-right {
    from { transform: translateX(20px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.artifact-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border);
    min-height: 48px;
}

.artifact-header-left {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
}

.artifact-title {
    font-size: 0.875rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.artifact-lang-badge {
    font-size: 0.6875rem;
    font-family: var(--font-mono);
    padding: 2px 6px;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.artifact-header-actions {
    display: flex;
    gap: var(--space-1);
}

/* Artifact tabs (preview/code) */
.artifact-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.artifact-tab {
    flex: 1;
    padding: var(--space-2) var(--space-4);
    font-size: 0.8125rem;
    font-weight: 500;
    text-align: center;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.artifact-tab:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.artifact-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

/* Artifact navigation (multi-artifact) */
.artifact-nav {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}

.artifact-nav-item {
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.artifact-nav-item:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.artifact-nav-item.active {
    background: var(--accent-light);
    color: var(--accent);
    border-color: var(--accent);
}

/* Artifact content */
.artifact-content {
    flex: 1;
    overflow: auto;
    position: relative;
}

.artifact-iframe {
    width: 100%;
    height: 100%;
    min-height: 100%;
    border: none;
    background: white;
}

.artifact-json {
    padding: var(--space-4);
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: #E5E7EB;
    background: var(--bg-code);
    overflow-x: auto;
    min-height: 100%;
}

/* --- Streaming code block progress --- */
.chat-code-streaming {
    border: 1px solid rgba(107,175,109,0.3);
    border-left: 3px solid var(--accent);
    animation: streamBorderPulse 2s ease-in-out infinite;
}
@keyframes streamBorderPulse {
    0%, 100% { border-left-color: var(--accent); }
    50% { border-left-color: rgba(107,175,109,0.15); }
}
/* Streaming code: NO max-height — grows naturally, parent scroll handles navigation.
   This prevents touch scroll capture that blocks users from scrolling up on mobile. */
.chat-code-streaming pre {
    max-height: none;
    overflow: visible;
    padding: var(--space-3);
}
/* On mobile: cap height to prevent filling entire screen, but use touch-action to allow parent scroll */
@media (max-width: 768px) {
    .chat-code-streaming pre {
        max-height: 200px;
        overflow: hidden; /* hidden, not auto — prevents scroll capture */
    }
    .chat-code-streaming {
        touch-action: pan-y; /* allow vertical scroll to pass through to parent */
    }
}
/* Blinking cursor at end of streaming code */
.chat-code-streaming code::after {
    content: '▋';
    color: var(--accent);
    animation: streamCursorBlink 0.8s step-end infinite;
    font-weight: normal;
}
@keyframes streamCursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}
.chat-stream-counter {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    z-index: 2;
    color: var(--accent) !important;
    font-size: 0.75rem !important;
    font-weight: 600;
    padding: 2px 8px;
    background: rgba(107,175,109,0.15);
    border-radius: 4px;
    animation: thinkPulse 1.5s ease-in-out infinite;
}

/* --- Mermaid diagram container --- */
.chat-mermaid {
    display: flex;
    justify-content: center;
    max-width: 100%;
    padding: var(--space-4);
    margin: var(--space-2) 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

.chat-mermaid .mermaid {
    margin: 0;
    font-family: var(--font-sans);
}

/* --- Conversation group labels (for date grouping) --- */
.chat-conv-group-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-3) var(--space-3) var(--space-1);
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    z-index: 1;
}

/* --- Copy button inline feedback --- */
.chat-copy-btn-copied {
    color: var(--green) !important;
}

/* --- Star button for conversations --- */
.chat-conv-star {
    opacity: 0;
    flex-shrink: 0;
    padding: 2px;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    line-height: 1;
    transition: all var(--transition-fast);
}

.chat-conv-item:hover .chat-conv-star {
    opacity: 1;
}

.chat-conv-star.starred {
    opacity: 1;
    color: #F59E0B;
}

.artifact-code {
    padding: var(--space-4);
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.7;
    color: #E5E7EB;
    background: var(--bg-code);
    overflow-x: auto;
    min-height: 100%;
}

.artifact-code code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.artifact-markdown {
    padding: var(--space-4);
    line-height: 1.6;
}

.artifact-table-wrap {
    padding: var(--space-4);
    overflow-x: auto;
}

.artifact-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

.artifact-table th,
.artifact-table td {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border);
    text-align: left;
}

.artifact-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.artifact-table tbody tr:nth-child(even) {
    background: var(--bg-secondary);
}

/* Inline artifact cards in messages */
/* (moved to bottom — Grok UX section) */

.chat-artifact-card-icon {
    width: 16px;
    height: 16px;
    color: var(--accent);
}

.chat-artifact-card-title {
    font-weight: 500;
}

.chat-artifact-card-meta {
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .artifact-panel {
        position: fixed;
        right: 0;
        top: 0;
        bottom: 0;
        z-index: 160;
        width: 90vw;
        max-width: 90vw;
        box-shadow: var(--shadow-lg);
    }
}

@media (max-width: 640px) {
    .chat-context-bar {
        flex-wrap: wrap;
        gap: var(--space-2);
    }

    .ctx-breakdown {
        display: none;
    }
}

/* --- Code block collapse --- */
.chat-code-collapsed pre { max-height: 350px; overflow: hidden; }
/* Expanded long code blocks — scrollable with visible scrollbar */
.chat-code-block:not(.chat-code-collapsed):not(.chat-code-streaming) pre {
    max-height: 500px;
    overflow: auto;
    scrollbar-width: thin;
    overscroll-behavior: contain;
}

.chat-code-expand {
    display: block;
    width: 100%;
    padding: 0.5rem;
    text-align: center;
    background: rgba(255,255,255,0.05);
    color: var(--accent);
    border: none;
    border-top: 1px solid rgba(255,255,255,0.1);
    cursor: pointer;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
}

.chat-code-expand:hover { background: rgba(255,255,255,0.1); }

/* --- Quick action buttons after assistant messages --- */
.chat-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-top: 0.5rem;
}

.chat-quick-action-btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-family: var(--font-sans);
    color: var(--accent);
    background: transparent;
    border: 1px solid rgba(107,175,109,0.4);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all 0.2s ease;
}

.chat-quick-action-btn:hover {
    opacity: 1;
    background: var(--accent);
    color: white;
}

/* --- Conversation rename button --- */
.chat-conv-rename {
    opacity: 0;
    flex-shrink: 0;
    padding: 2px;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.chat-conv-item:hover .chat-conv-rename {
    opacity: 1;
}

.chat-conv-rename:hover {
    color: var(--accent);
    background: var(--accent-light);
}

/* --- Long message collapse card --- */
.chat-msg-collapsed {
    max-height: 600px;
    overflow: hidden;
    position: relative;
}
.chat-msg-collapsed::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(transparent, var(--bg-primary));
    pointer-events: none;
}
[data-theme="dark"] .chat-msg-collapsed::after {
    background: linear-gradient(transparent, var(--bg-primary));
}
.chat-msg-expand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.625rem 1rem;
    margin-top: 0.25rem;
    font-size: 0.8125rem;
    font-family: var(--font-sans);
    color: var(--accent);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.chat-msg-expand:hover {
    background: var(--accent-light);
    border-color: var(--accent);
}
.chat-msg-expand svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}
.chat-msg-expanded .chat-msg-expand svg {
    transform: rotate(180deg);
}

/* --- Message metadata (timestamp, lines) — always visible --- */
.chat-msg-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 0.375rem;
}

/* --- Thinking indicator (pulsing brain) --- */
.chat-thinking {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-secondary);
    animation: thinkPulse 2s ease-in-out infinite;
}
.chat-thinking-icon {
    font-size: 1rem;
    animation: thinkSpin 3s linear infinite;
}
@keyframes thinkPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}
@keyframes thinkSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Thinking content (collapsible, like Claude.ai) --- */
.chat-thinking-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-family: var(--font-sans);
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}
.chat-thinking-toggle:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-color: var(--accent);
}
.chat-thinking-toggle svg {
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}
.chat-thinking-toggle .rotate-90 {
    transform: rotate(90deg);
}
.chat-thinking-counter {
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}
.chat-thinking-content {
    margin-top: 0.375rem;
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--text-muted);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 400px;
    overflow-y: auto;
    font-family: var(--font-sans);
}

/* ============================================
   Grok 4.20 UX improvements
   ============================================ */

/* Skill badges — shows which skills are activated */
.chat-skill-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    margin-bottom: 0.5rem;
}
.chat-skill-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--accent);
    background: rgba(107,175,109,0.08);
    border: 1px solid rgba(107,175,109,0.2);
    border-radius: var(--radius-full);
    animation: skillFadeIn 0.3s ease forwards;
}
.chat-skill-badge svg {
    width: 12px;
    height: 12px;
}

/* Skill steps indicator (Claude-style, real skill detection) */
.chat-status-indicator {
    padding: 0.25rem 0;
    transition: opacity 0.3s ease;
}
.chat-skill-step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-muted);
    padding: 0.25rem 0;
    opacity: 0.4;
    animation: skillFadeIn 0.4s ease forwards;
    transition: opacity 0.3s ease;
}
.chat-skill-step.active {
    opacity: 1;
    color: var(--text-secondary);
}
.chat-skill-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 0.375rem;
    color: var(--accent);
    flex-shrink: 0;
}
.chat-skill-step.active .chat-skill-icon {
    animation: thinkSpin 2s linear infinite;
    background: rgba(107,175,109,0.1);
}
@keyframes skillFadeIn {
    from { opacity: 0; transform: translateX(-8px); }
    to { opacity: 0.4; transform: translateX(0); }
}

/* #1 Skeleton shimmer loading placeholder */
.chat-skeleton {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem 0;
}
.chat-skeleton-line {
    height: 0.75rem;
    border-radius: var(--radius-sm);
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}
.chat-skeleton-line:nth-child(1) { width: 85%; }
.chat-skeleton-line:nth-child(2) { width: 70%; }
.chat-skeleton-line:nth-child(3) { width: 55%; }
@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* #5 Send button pulse during streaming */
.chat-send-btn-stop {
    animation: sendPulse 1.5s ease-in-out infinite;
}
@keyframes sendPulse {
    0%, 100% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

/* #9 Star icon smooth animation */
.chat-conv-star {
    transition: transform 0.2s ease, color 0.2s ease;
}
.chat-conv-star:active {
    transform: scale(0.8);
}
.chat-conv-star.starred {
    animation: starPop 0.3s ease;
}
@keyframes starPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.3) rotate(15deg); }
    100% { transform: scale(1); }
}

/* #10 Code copy feedback — already have toast, add inline checkmark */
.chat-code-copy.copied {
    color: var(--accent) !important;
    opacity: 1 !important;
}

/* #11 Message timestamps hover-only (desktop) */
@media (hover: hover) {
    .chat-msg-meta {
        opacity: 0;
        transition: opacity 0.2s ease;
    }
    .chat-message:hover .chat-msg-meta {
        opacity: 1;
    }
}

/* #13 Focus-visible glow (a11y) */
*:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--accent);
    border-radius: inherit;
}
button:focus-visible, .btn-icon:focus-visible, .chat-conv-item:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px rgba(107,175,109,0.5);
}

/* #14 Error slide-down banner */
.chat-error-banner {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    z-index: 200;
    padding: 0.625rem 1.25rem;
    background: var(--red);
    color: white;
    font-size: 0.8125rem;
    border-radius: 0 0 var(--radius) var(--radius);
    box-shadow: var(--shadow-lg);
    animation: slideDownBanner 0.3s ease-out forwards;
}
@keyframes slideDownBanner {
    to { transform: translateX(-50%) translateY(0); }
}

/* #15 Model dropdown smooth animation */
.chat-model-dropdown {
    animation: dropdownOpen 0.15s ease-out;
    transform-origin: bottom left;
}
@keyframes dropdownOpen {
    from { opacity: 0; transform: scale(0.95) translateY(4px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}
/* Stagger items */
.chat-model-option {
    animation: itemFadeIn 0.1s ease-out both;
}
.chat-model-option:nth-child(1) { animation-delay: 0s; }
.chat-model-option:nth-child(2) { animation-delay: 0.03s; }
.chat-model-option:nth-child(3) { animation-delay: 0.06s; }
.chat-model-option:nth-child(4) { animation-delay: 0.09s; }
.chat-model-option:nth-child(5) { animation-delay: 0.12s; }
.chat-model-option:nth-child(6) { animation-delay: 0.15s; }
@keyframes itemFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Streaming artifact card (Claude-style) */
.chat-artifact-card-streaming {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(107,175,109,0.04) 100%);
    border: 1px solid rgba(107,175,109,0.2);
    border-radius: 0.75rem;
    margin: 0.5rem 0;
    cursor: default;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.04);
    position: relative;
    overflow: hidden;
}
/* Animated shimmer overlay */
.chat-artifact-card-streaming::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(107,175,109,0.06), transparent);
    animation: artifactShimmer 2s ease-in-out infinite;
}
@keyframes artifactShimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}
/* Code tail preview below artifact card (shows last ~6 lines, like Claude.ai) */
.chat-code-tail {
    margin-top: -0.25rem;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    opacity: 0.75;
}
.chat-code-tail pre {
    max-height: 120px;
    overflow: hidden;
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
}
.chat-code-tail code::after {
    content: '▋';
    color: var(--accent);
    animation: streamCursorBlink 0.8s step-end infinite;
}

/* Icon container */
.chat-artifact-card-streaming svg {
    background: rgba(107,175,109,0.1);
    padding: 6px;
    border-radius: 0.5rem;
    width: 28px;
    height: 28px;
    box-sizing: content-box;
    flex-shrink: 0;
}
.chat-artifact-card-meta {
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-top: 2px;
    letter-spacing: 0.01em;
}
.chat-artifact-skill {
    color: var(--accent);
    font-family: var(--font-sans);
    font-weight: 500;
}
.chat-artifact-badge {
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(107,175,109,0.1);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    white-space: nowrap;
    flex-shrink: 0;
    animation: thinkPulse 1.5s ease-in-out infinite;
    letter-spacing: 0.02em;
}
/* Progress bar for artifact card — visual motion during GPT chunks */
.chat-artifact-card-streaming::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 0 0 0.75rem 0.75rem;
    animation: artifactProgress 3s ease-in-out infinite;
}
@keyframes artifactProgress {
    0% { width: 0; opacity: 0.8; }
    50% { width: 70%; opacity: 1; }
    100% { width: 100%; opacity: 0; }
}

/* Static artifact cards (completed, clickable) */
.chat-artifact-card {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 1rem;
    margin-top: 0.375rem;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(107,175,109,0.03) 100%);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    cursor: pointer;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    position: relative;
    overflow: hidden;
}
.chat-artifact-card::after {
    content: '→';
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: transform 0.2s ease, color 0.2s ease;
}
.chat-artifact-card:hover {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--accent-light) 0%, rgba(107,175,109,0.08) 100%);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(107,175,109,0.12);
}
.chat-artifact-card:hover::after {
    transform: translateX(3px);
    color: var(--accent);
}
.chat-artifact-card:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

/* #3 Message bubble hover elevation (desktop only) */
@media (hover: hover) {
    .chat-bubble-assistant {
        transition: transform 0.15s ease, box-shadow 0.15s ease;
        border-radius: var(--radius);
    }
    .chat-message:hover .chat-bubble-assistant {
        transform: translateY(-1px);
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }
}