/* ASSISTANT chat page — copied verbatim from the real studio source,
   each selector scoped + specificity-boosted under ".smk". var(...) tokens
   (cyan studio theme) are provided by the shared base stylesheet on .smk.

   Sources:
   - legacy-portal.css  → .nav-rail* / .nav-user-avatar / .portal-* (brand bar)
   - legacy-studio.css  → .assistant-* / .composer-* / .thinking-* (lines ~4227-5037)

   The real studio viewport is 1912x888; build at the real pixel sizes. The
   root fills its parent so a parent scaler can transform it down. Animations
   are reduced-motion safe: resting state is the final, fully-visible state. */

/* ---- Root: fill parent, lay out nav-rail + content column horizontally ---- */
.smk.smk--chat {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    overflow: hidden;
    background-color: var(--bg-primary);
    font-family: var(--font-mono);
}

/* =============================================
   Navigation Rail (legacy-portal.css)
   ============================================= */
.smk .nav-rail {
    width: 64px;
    min-width: 64px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    z-index: 100;
}

.smk .nav-rail-top,
.smk .nav-rail-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.smk .nav-rail-top {
    padding-top: 8px;
}

.smk .nav-rail-bottom {
    padding-bottom: 12px;
}

.smk .nav-rail-logo {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    margin-bottom: 12px;
    filter: drop-shadow(0 0 6px var(--text-dim));
}

.smk .nav-rail-item {
    width: 52px;
    height: 52px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
    font-family: var(--font-mono);
}

.smk .nav-rail-item:hover {
    color: var(--text-dim);
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

.smk .nav-rail-item.active {
    color: var(--text-primary);
    background-color: rgba(0, 212, 255, 0.08);
    border-color: var(--text-primary);
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.15);
}

.smk .nav-rail-label {
    font-size: 8px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    white-space: nowrap;
}

.smk .nav-rail-user {
    gap: 2px;
}

.smk .nav-user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-white);
}

.smk .nav-rail-item.nav-rail-user:hover .nav-user-avatar {
    border-color: var(--accent-red);
}

.smk .nav-rail-item.nav-rail-user:hover {
    color: var(--accent-red);
}

/* =============================================
   Portal layout / brand header (legacy-portal.css)
   ============================================= */
.smk .portal-layout {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
    min-height: 0;
    background-color: var(--bg-primary);
    background-image:
        linear-gradient(90deg, rgba(0,212,255,0.015) 1px, transparent 1px),
        linear-gradient(rgba(0,212,255,0.015) 1px, transparent 1px);
    background-size: 20px 20px;
}

.smk .portal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    min-height: 48px;
}

.smk .portal-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.smk .portal-header-title {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1.5px;
    text-shadow: 0 0 10px var(--text-dim);
}

.smk .portal-header-sep {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.smk .portal-header-page {
    color: var(--text-white);
    font-size: var(--font-size-sm);
    letter-spacing: 0.5px;
}

.smk .portal-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.smk .portal-content.assistant-active {
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
    min-height: 0;
    max-height: 100%;
}

/* =============================================
   Assistant page (legacy-studio.css ~4227-5037)
   ============================================= */
.smk .assistant-page {
    display: flex;
    flex: 1;
    min-height: 0;
    max-height: 100%;
    overflow: hidden;
}

/* --- Sidebar --- */
.smk .assistant-sidebar {
    width: 260px;
    min-width: 260px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    min-height: 0;
}

.smk .assistant-new-chat-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) var(--spacing-md) var(--spacing-xs);
    padding: 10px 12px;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.18);
    border-radius: 8px;
    color: var(--text-white);
    font-size: var(--font-size-xs);
    font-family: var(--font-mono);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.smk .assistant-new-chat-btn:hover {
    background: rgba(0, 212, 255, 0.12);
    border-color: var(--accent-cyan);
}

.smk .assistant-new-chat-btn svg {
    flex-shrink: 0;
    color: var(--accent-cyan);
}

.smk .assistant-recents-label {
    padding: var(--spacing-sm) var(--spacing-md) 4px;
    font-size: 10px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.smk .assistant-session-list {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.smk .assistant-session-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 2px;
    transition: background var(--transition-fast);
    position: relative;
}

.smk .assistant-session-item:hover {
    background: var(--bg-tertiary);
}

.smk .assistant-session-item.active {
    background: var(--bg-tertiary);
}

.smk .assistant-session-title {
    font-size: var(--font-size-xs);
    color: var(--text-white);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

.smk .assistant-session-delete {
    display: none;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 4px;
    font-size: 14px;
    line-height: 1;
    border-radius: 4px;
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.smk .assistant-session-item:hover .assistant-session-delete {
    display: block;
}

.smk .assistant-session-delete:hover {
    color: var(--accent-red);
}

/* --- Chat Area --- */
.smk .assistant-chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    max-height: 100%;
    background: var(--bg-primary);
    overflow: hidden;
}

/* --- Messages --- */
.smk .assistant-messages {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding: var(--spacing-lg) 0;
}

.smk .assistant-messages-inner {
    width: 100%;
    max-width: 768px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.smk .assistant-msg {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--text-white);
}

.smk .assistant-msg.user {
    align-self: flex-end;
    background: rgba(0, 212, 255, 0.06);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 12px;
    padding: 10px 16px;
    max-width: 85%;
}

.smk .assistant-msg.assistant {
    padding: 4px 0;
}

.smk .assistant-thinking-dots {
    display: inline-flex;
    gap: 4px;
    align-items: center;
    padding: 8px 0;
}

.smk .assistant-thinking-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-cyan);
    animation: smk-assistantDotPulse 1.4s ease-in-out infinite;
}

.smk .assistant-thinking-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.smk .assistant-thinking-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes smk-assistantDotPulse {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* --- Markdown Content --- */
.smk .assistant-msg-content {
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.smk .assistant-msg-content.markdown-body {
    color: var(--text-white) !important;
    font-size: var(--font-size-sm);
    font-family: var(--font-mono);
    line-height: 1.7;
    max-height: 600px;
    overflow-y: auto;
}

.smk .assistant-msg-content.markdown-body h1,
.smk .assistant-msg-content.markdown-body h2,
.smk .assistant-msg-content.markdown-body h3,
.smk .assistant-msg-content.markdown-body h4 {
    color: var(--text-white);
    border-bottom: none;
    margin-top: 1.2em;
    margin-bottom: 0.4em;
}

.smk .assistant-msg-content.markdown-body p {
    margin-bottom: 0.6em;
}

.smk .assistant-msg-content.markdown-body ul,
.smk .assistant-msg-content.markdown-body ol {
    padding-left: 1.5em;
    margin-bottom: 0.6em;
}

.smk .assistant-msg-content.markdown-body li {
    margin-bottom: 0.3em;
}

.smk .assistant-msg-content.markdown-body pre {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 14px;
    overflow-x: auto;
    margin: 0.8em 0;
}

.smk .assistant-msg-content.markdown-body code {
    background: var(--bg-tertiary) !important;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

.smk .assistant-msg-content.markdown-body pre code {
    background: transparent !important;
    padding: 0;
    border-radius: 0;
    font-size: var(--font-size-xs);
}

.smk .assistant-msg-content.markdown-body strong {
    color: var(--text-white);
    font-weight: 700;
}

.smk .assistant-msg-content.markdown-body blockquote {
    border-left: 3px solid var(--border-highlight);
    padding-left: 12px;
    color: var(--text-muted);
    margin: 0.8em 0;
}

.smk .assistant-msg-content.markdown-body table {
    border-collapse: collapse;
    margin: 0.8em 0;
    width: 100%;
}

.smk .assistant-msg-content.markdown-body th,
.smk .assistant-msg-content.markdown-body td {
    border: 1px solid var(--border-color);
    padding: 6px 10px;
    text-align: left;
}

.smk .assistant-msg-content.markdown-body th {
    background: var(--bg-secondary);
}

/* --- Thinking Bar (between messages and input) --- */
.smk .assistant-thinking-bar {
    display: flex;
    align-items: stretch;
    gap: 8px;
    padding: 10px var(--spacing-xl);
    flex-shrink: 0;
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

/* Claude-style "thinking" line: spark + shimmering word. */
.smk .thinking-line {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-sm);
}

.smk .thinking-spark {
    display: inline-flex;
    color: var(--accent-cyan);
    flex-shrink: 0;
    animation: smk-thinking-spark-pulse 2.2s ease-in-out infinite;
}

@keyframes smk-thinking-spark-pulse {
    0%, 100% { transform: rotate(0deg) scale(0.95); opacity: 0.8; }
    50% { transform: rotate(90deg) scale(1.12); opacity: 1; }
}

.smk .thinking-shimmer {
    background: linear-gradient(
        90deg,
        var(--text-muted) 0%,
        var(--text-muted) 35%,
        var(--text-white) 50%,
        var(--text-muted) 65%,
        var(--text-muted) 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    animation: smk-thinking-shimmer-sweep 2.2s linear infinite;
    letter-spacing: 0.01em;
}

@keyframes smk-thinking-shimmer-sweep {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* --- Composer (Claude-style input) --- */
.smk .composer {
    display: flex;
    justify-content: center;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-lg);
    flex-shrink: 0;
}

.smk .composer-box {
    width: 100%;
    max-width: 768px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px 14px 10px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.smk .composer-box:focus-within {
    border-color: var(--text-dim);
    box-shadow: 0 0 0 1px rgba(0, 212, 255, 0.12), 0 8px 30px rgba(0, 0, 0, 0.4);
}

.smk .composer-textarea {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-white);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    resize: none;
    min-height: 24px;
    max-height: 200px;
    padding: 2px 4px;
}

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

.smk .composer-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
}

.smk .composer-left,
.smk .composer-right {
    display: flex;
    align-items: center;
    gap: 6px;
}

.smk .composer-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.smk .composer-icon-btn:hover {
    color: var(--accent-cyan);
    border-color: var(--text-dim);
    background: rgba(0, 212, 255, 0.06);
}

.smk .composer-server {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-size-xs);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.smk .composer-server:hover {
    border-color: var(--text-dim);
    color: var(--text-white);
}

.smk .composer-server-glyph {
    flex-shrink: 0;
    color: var(--accent-cyan);
}

.smk .composer-server-label {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.smk .composer-chevron {
    flex-shrink: 0;
    opacity: 0.7;
}

.smk .composer-send {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 9px;
    border: none;
    flex-shrink: 0;
    background: var(--accent-cyan);
    color: #06222b;
    cursor: pointer;
    transition: opacity var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
}

.smk .composer-send:hover:not(:disabled) {
    transform: translateY(-1px);
}

.smk .composer-send:disabled {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    cursor: not-allowed;
}

/* --- Message action controls (copy / regenerate) --- */
.smk .assistant-msg-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-top: 6px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.smk .assistant-msg.assistant:hover .assistant-msg-actions,
.smk .assistant-msg-actions:focus-within {
    opacity: 1;
}

.smk .assistant-msg-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.smk .assistant-msg-action:hover {
    color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.08);
}

/* =============================================
   Mock entrance animations (added for the showcase).
   Reduced-motion safe: resting state = final, fully-visible state.
   ============================================= */

/* Thinking indicator fade-in */
.smk .smk-fade-in {
    animation: smk-fade-in 0.3s ease both;
}

@keyframes smk-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Streamed reply lines: resting = fully visible */
.smk .smk-stream {
    animation: smk-stream-in 0.4s ease both;
}

@keyframes smk-stream-in {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .smk .assistant-thinking-dots span,
    .smk .thinking-spark,
    .smk .thinking-shimmer,
    .smk .smk-fade-in,
    .smk .smk-stream {
        animation-duration: 0.001s !important;
        animation-iteration-count: 1 !important;
    }
    .smk .thinking-shimmer {
        -webkit-text-fill-color: var(--text-muted);
        color: var(--text-muted);
    }
}