/* Lumi — GitHub-inspired light/dark AI chat UI */

:root,
[data-theme="dark"] {
    color-scheme: dark;
    --lumi-bg: #010409;
    --lumi-bg-subtle: #0d1117;
    --lumi-bg-elevated: #161b22;
    --lumi-bg-overlay: rgba(13, 17, 23, 0.92);
    --lumi-border: #30363d;
    --lumi-border-muted: #21262d;
    --lumi-fg: #e6edf3;
    --lumi-fg-muted: #8b949e;
    --lumi-fg-subtle: #6e7681;
    --lumi-accent: #58a6ff;
    --lumi-accent-emphasis: #1f6feb;
    --lumi-accent-subtle: rgba(88, 166, 255, 0.12);
    --lumi-green: #3fb950;
    --lumi-purple: #a371f7;
    --lumi-red: #f85149;
    --lumi-orange: #d29922;
    --lumi-user-bg: #21262d;
    --lumi-assistant-bg: transparent;
    --lumi-code-bg: #161b22;
    --lumi-input-bg: #0d1117;
    --lumi-shadow: rgba(0, 0, 0, 0.45);
    --lumi-grid: rgba(48, 54, 61, 0.35);
    --lumi-glow-a: rgba(88, 166, 255, 0.18);
    --lumi-glow-b: rgba(163, 113, 247, 0.14);
    --lumi-scrollbar: #484f58;
}

[data-theme="light"] {
    color-scheme: light;
    --lumi-bg: #ffffff;
    --lumi-bg-subtle: #f6f8fa;
    --lumi-bg-elevated: #ffffff;
    --lumi-bg-overlay: rgba(255, 255, 255, 0.92);
    --lumi-border: #d0d7de;
    --lumi-border-muted: #eaeef2;
    --lumi-fg: #1f2328;
    --lumi-fg-muted: #656d76;
    --lumi-fg-subtle: #8c959f;
    --lumi-accent: #0969da;
    --lumi-accent-emphasis: #0550ae;
    --lumi-accent-subtle: rgba(9, 105, 218, 0.1);
    --lumi-green: #1a7f37;
    --lumi-purple: #8250df;
    --lumi-red: #cf222e;
    --lumi-orange: #bf8700;
    --lumi-user-bg: #f6f8fa;
    --lumi-assistant-bg: transparent;
    --lumi-code-bg: #f6f8fa;
    --lumi-input-bg: #ffffff;
    --lumi-shadow: rgba(31, 35, 40, 0.12);
    --lumi-grid: rgba(208, 215, 222, 0.6);
    --lumi-glow-a: rgba(9, 105, 218, 0.08);
    --lumi-glow-b: rgba(130, 80, 223, 0.06);
    --lumi-scrollbar: #c4cdd5;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', Helvetica, Arial, sans-serif;
    background: var(--lumi-bg);
    color: var(--lumi-fg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.lumi-bg-grid {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(var(--lumi-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--lumi-grid) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 70% 50% at 50% 0%, black 10%, transparent 65%);
}

.lumi-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
    z-index: 0;
}
.lumi-glow-a { width: 520px; height: 360px; top: -80px; left: 8%; background: var(--lumi-glow-a); }
.lumi-glow-b { width: 420px; height: 300px; top: 120px; right: 6%; background: var(--lumi-glow-b); }

.lumi-app {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    height: 100dvh;
    max-height: 100dvh;
}

/* ── Header ── */
.lumi-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 16px;
    height: 56px;
    background: var(--lumi-bg-overlay);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.lumi-header-left,
.lumi-header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lumi-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--lumi-fg);
    font-weight: 600;
    font-size: 0.95rem;
}

.lumi-logo-mark {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--lumi-accent-emphasis), var(--lumi-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.lumi-logo-img {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--lumi-border-muted);
    box-shadow: 0 2px 8px var(--lumi-shadow);
}

.lumi-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--lumi-fg-muted);
    padding: 3px 10px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border-muted);
    background: var(--lumi-bg-subtle);
}

.lumi-status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--lumi-fg-subtle);
}
.lumi-status.online .lumi-status-dot {
    background: var(--lumi-green);
    box-shadow: 0 0 6px var(--lumi-green);
}
.lumi-status.offline .lumi-status-dot { background: var(--lumi-red); }

.lumi-header-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    border: 1px solid var(--lumi-border);
    border-radius: 8px;
    background: var(--lumi-bg-elevated);
    color: var(--lumi-fg-muted);
    font-size: 0.82rem;
    cursor: pointer;
    text-decoration: none;
    transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.lumi-header-btn:hover {
    border-color: var(--lumi-accent);
    color: var(--lumi-fg);
}
.lumi-header-btn.primary {
    background: var(--lumi-accent-emphasis);
    border-color: transparent;
    color: #fff;
}
.lumi-header-btn.primary:hover { opacity: 0.92; color: #fff; }

/* ── Body layout ── */
.lumi-body {
    flex: 1;
    display: flex;
    min-height: 0;
    overflow: hidden;
    position: relative;
    transition: gap 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lumi-sidebar {
    flex-shrink: 0;
    width: 260px;
    border-right: 1px solid var(--lumi-border-muted);
    background: var(--lumi-bg-subtle);
    display: flex;
    flex-direction: column;
    padding: 12px;
    gap: 8px;
    overflow: hidden;
    transition: width 0.32s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.28s ease,
                transform 0.32s cubic-bezier(0.4, 0, 0.2, 1),
                padding 0.32s ease,
                border-width 0.32s ease;
}

.lumi-body.sidebar-collapsed .lumi-sidebar {
    width: 0;
    padding: 0;
    opacity: 0;
    border-right-width: 0;
    transform: translateX(-12px);
    pointer-events: none;
}

.lumi-sidebar-head {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lumi-sidebar-head .lumi-new-chat {
    flex: 1;
    min-width: 0;
}

.lumi-sidebar-collapse,
.lumi-sidebar-expand {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border: 1px solid var(--lumi-border);
    border-radius: 8px;
    background: var(--lumi-bg-elevated);
    color: var(--lumi-fg-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, color 0.2s, transform 0.2s, background 0.2s;
}

.lumi-sidebar-close {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border: 1px solid var(--lumi-border);
    border-radius: 8px;
    background: var(--lumi-bg-elevated);
    color: var(--lumi-fg-muted);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: border-color 0.2s, color 0.2s, transform 0.2s, background 0.2s;
}

.lumi-sidebar-collapse:hover,
.lumi-sidebar-expand:hover,
.lumi-sidebar-close:hover {
    border-color: var(--lumi-accent);
    color: var(--lumi-accent);
    transform: scale(1.05);
}

.lumi-sidebar-expand {
    position: absolute;
    left: 8px;
    top: 12px;
    z-index: 5;
    opacity: 0;
    pointer-events: none;
    transform: translateX(-8px);
    transition: opacity 0.28s ease, transform 0.28s ease;
    box-shadow: 0 4px 16px var(--lumi-shadow);
}
.lumi-body.sidebar-collapsed .lumi-sidebar-expand {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(0);
}

.lumi-sidebar.hidden { display: none; }

.lumi-new-chat {
    width: 100%;
    justify-content: center;
    font-weight: 500;
}

.lumi-task-list {
    max-height: 140px;
    flex: 0 1 auto;
}

.lumi-sidebar-section {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--lumi-fg-subtle);
    padding: 8px 4px 4px;
}

.lumi-context-pill {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--lumi-border);
    background: var(--lumi-bg-elevated);
    font-size: 0.8rem;
    color: var(--lumi-fg-muted);
}
.lumi-context-pill i { color: var(--lumi-accent); margin-top: 2px; }
.lumi-context-pill strong { color: var(--lumi-fg); display: block; font-size: 0.82rem; }

.lumi-history-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-height: 0;
}

.lumi-history-item {
    text-align: left;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--lumi-fg-muted);
    font-size: 0.78rem;
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
}
.lumi-history-item:hover {
    background: var(--lumi-bg-elevated);
    border-color: var(--lumi-border-muted);
    color: var(--lumi-fg);
}
.lumi-history-item .time { font-size: 0.68rem; color: var(--lumi-fg-subtle); display: block; margin-bottom: 2px; }

.lumi-sidebar-footer {
    margin-top: auto;
    padding-top: 8px;
    border-top: 1px solid var(--lumi-border-muted);
    font-size: 0.75rem;
    color: var(--lumi-fg-subtle);
}
.lumi-sidebar-footer a {
    color: var(--lumi-accent);
    text-decoration: none;
}
.lumi-sidebar-footer a:hover { text-decoration: underline; }

/* ── Main chat ── */
.lumi-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
    transition: margin-left 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.lumi-body.sidebar-collapsed .lumi-main {
    margin-left: 0;
}

.lumi-messages {
    flex: 1;
    overflow-y: auto;
    scroll-behavior: smooth;
    padding: 24px 16px 16px;
}

.lumi-messages-inner {
    max-width: 768px;
    margin: 0 auto;
    width: 100%;
}

/* Empty state / hero */
.lumi-welcome {
    text-align: center;
    padding: 56px 16px 24px;
    max-width: 560px;
    margin: 0 auto;
    animation: lumi-welcome-in 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes lumi-welcome-in {
    from { opacity: 0; transform: translateY(16px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.lumi-welcome.is-leaving {
    animation: lumi-welcome-out 0.35s ease forwards;
}

@keyframes lumi-welcome-out {
    to { opacity: 0; transform: translateY(-12px) scale(0.98); }
}

.lumi-welcome-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border);
    background: var(--lumi-bg-elevated);
    font-size: 0.78rem;
    color: var(--lumi-fg-muted);
    margin-bottom: 20px;
}

.lumi-welcome h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 12px;
}

.lumi-welcome h1 .gradient {
    background: linear-gradient(90deg, var(--lumi-accent), var(--lumi-purple), var(--lumi-accent));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: lumi-shimmer 6s linear infinite;
}

@keyframes lumi-shimmer {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.lumi-welcome > p {
    color: var(--lumi-fg-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}

.lumi-suggestions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    max-width: 520px;
    margin: 0 auto;
}

.lumi-suggestion {
    font-family: inherit;
    font-size: 0.82rem;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border);
    background: var(--lumi-bg-elevated);
    color: var(--lumi-fg-muted);
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.2s;
    animation: lumi-sug-in 0.4s ease backwards;
}
.lumi-suggestion:nth-child(1) { animation-delay: 0.08s; }
.lumi-suggestion:nth-child(2) { animation-delay: 0.14s; }
.lumi-suggestion:nth-child(3) { animation-delay: 0.2s; }
.lumi-suggestion:nth-child(4) { animation-delay: 0.26s; }
.lumi-suggestion:nth-child(5) { animation-delay: 0.32s; }

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

.lumi-suggestion:hover:not(:disabled) {
    border-color: var(--lumi-accent);
    color: var(--lumi-accent);
    background: var(--lumi-accent-subtle);
    transform: translateY(-1px);
}
.lumi-suggestion:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

/* Messages */
.lumi-msg {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    animation: lumi-msg-in 0.32s cubic-bezier(0.4, 0, 0.2, 1);
}

.lumi-msg.is-streaming {
    animation: none;
}

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

.lumi-msg.user { flex-direction: row-reverse; position: relative; }

.lumi-msg-delete {
    flex-shrink: 0;
    align-self: center;
    width: 28px;
    height: 28px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    color: var(--lumi-fg-subtle);
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s, color 0.2s, border-color 0.2s, background 0.2s;
    font-size: 0.72rem;
}
.lumi-msg.user:hover .lumi-msg-delete,
.lumi-msg-delete:focus-visible {
    opacity: 1;
}
.lumi-msg-delete:hover {
    color: var(--lumi-red);
    border-color: rgba(248, 81, 73, 0.35);
    background: rgba(248, 81, 73, 0.08);
}

.lumi-conv-empty {
    font-size: 0.78rem;
    color: var(--lumi-fg-subtle);
    padding: 8px 4px;
    opacity: 0.7;
}

.lumi-conv-item {
    display: flex;
    align-items: stretch;
    gap: 4px;
    border-radius: 8px;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}
.lumi-conv-item:hover { background: var(--lumi-bg-elevated); }
.lumi-conv-item.active {
    background: var(--lumi-accent-subtle);
    border-color: var(--lumi-accent);
}

.lumi-conv-open {
    flex: 1;
    min-width: 0;
    text-align: left;
    padding: 8px 10px;
    border: none;
    background: transparent;
    color: var(--lumi-fg-muted);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.78rem;
}
.lumi-conv-item.active .lumi-conv-open { color: var(--lumi-fg); }

.lumi-conv-title {
    display: block;
    font-size: 0.82rem;
    color: var(--lumi-fg);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}

.lumi-conv-delete {
    flex-shrink: 0;
    width: 32px;
    border: none;
    background: transparent;
    color: var(--lumi-fg-subtle);
    cursor: pointer;
    border-radius: 0 8px 8px 0;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s, background 0.15s;
}
.lumi-conv-item:hover .lumi-conv-delete,
.lumi-conv-delete:focus-visible { opacity: 1; }
.lumi-conv-delete:hover {
    color: var(--lumi-red);
    background: rgba(248, 81, 73, 0.08);
}

.lumi-avatar {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
    overflow: hidden;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.lumi-msg:hover .lumi-avatar { transform: scale(1.06); }

.lumi-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.lumi-msg.assistant .lumi-avatar {
    background: linear-gradient(135deg, var(--lumi-accent-emphasis), var(--lumi-purple));
    box-shadow: 0 2px 10px var(--lumi-shadow);
}
.lumi-msg.user .lumi-avatar {
    background: var(--lumi-border);
    color: var(--lumi-fg-muted);
}

.lumi-msg.system {
    justify-content: center;
}
.lumi-msg.system .lumi-avatar { display: none; }
.lumi-msg.system .lumi-msg-body { max-width: 100%; text-align: center; }
.lumi-msg.system .lumi-msg-content {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--lumi-fg-muted);
    background: var(--lumi-bg-subtle);
    border: 1px dashed var(--lumi-border);
    border-radius: 999px;
    padding: 6px 14px;
}
.lumi-msg.error .lumi-msg-content {
    color: var(--lumi-red);
    border-color: rgba(248, 81, 73, 0.35);
    background: rgba(248, 81, 73, 0.08);
}

.lumi-topic-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 18px 0 14px;
    padding: 0 8px;
    user-select: none;
}

.lumi-topic-divider-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--lumi-border), transparent);
}

.lumi-topic-divider-label {
    flex-shrink: 0;
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--lumi-fg-muted);
    padding: 4px 10px;
    border-radius: 999px;
    border: 1px dashed var(--lumi-border-muted);
    background: var(--lumi-bg-subtle);
}

.lumi-msg-body {
    flex: 1;
    min-width: 0;
    max-width: calc(100% - 44px);
}

.lumi-msg-role {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--lumi-fg-subtle);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.lumi-msg.user .lumi-msg-role { text-align: right; }

.lumi-msg-content {
    font-size: 0.925rem;
    line-height: 1.65;
    word-break: break-word;
}
.lumi-msg.user .lumi-msg-content {
    background: var(--lumi-user-bg);
    border: 1px solid var(--lumi-border-muted);
    border-radius: 12px 12px 4px 12px;
    padding: 10px 14px;
}
.lumi-msg.assistant .lumi-msg-content { padding-top: 2px; }

.lumi-msg.is-streaming .lumi-msg-content {
    min-height: 1.5em;
}

.lumi-msg.is-streaming .lumi-avatar {
    animation: lumi-avatar-glow 2s ease-in-out infinite;
}

@keyframes lumi-avatar-glow {
    0%, 100% { box-shadow: 0 2px 10px var(--lumi-shadow); }
    50% { box-shadow: 0 0 0 2px var(--lumi-accent-subtle), 0 4px 14px var(--lumi-shadow); }
}

.lumi-thinking-block {
    margin-bottom: 12px;
    border: 1px solid var(--lumi-border-muted);
    border-radius: 10px;
    background: var(--lumi-bg-subtle);
    overflow: hidden;
    animation: lumi-thinking-in 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes lumi-thinking-in {
    from { opacity: 0; max-height: 0; transform: translateY(-4px); }
    to { opacity: 1; max-height: 2000px; transform: translateY(0); }
}

.lumi-thinking-block.is-streaming {
    border-color: var(--lumi-purple);
    box-shadow: 0 0 0 1px rgba(163, 113, 247, 0.15);
}

.lumi-thinking-block summary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--lumi-purple);
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: background 0.15s;
}

.lumi-thinking-block summary::-webkit-details-marker { display: none; }

.lumi-thinking-block summary:hover {
    background: rgba(163, 113, 247, 0.08);
}

.lumi-thinking-block summary .lumi-thinking-icon {
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
}

.lumi-thinking-block.is-streaming summary .lumi-thinking-icon {
    animation: lumi-brain-spin 2s linear infinite;
}

@keyframes lumi-brain-spin {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.65; transform: scale(1.1); }
}

.lumi-thinking-body {
    padding: 0 12px 12px;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--lumi-fg-muted);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 280px;
    overflow-y: auto;
    border-top: 1px dashed var(--lumi-border-muted);
    padding-top: 10px;
    margin-top: 0;
}

.lumi-thinking-body:empty { display: none; }

.lumi-reply-body {
    min-height: 1em;
}

.lumi-reply-body .lumi-math-block {
    display: block;
    margin: 0.75em 0;
    overflow-x: auto;
    overflow-y: hidden;
    text-align: center;
}

.lumi-reply-body .lumi-math-inline {
    display: inline-block;
    vertical-align: middle;
    max-width: 100%;
    overflow-x: auto;
}

.lumi-reply-body .katex {
    font-size: 1.06em;
}

.lumi-reply-body .katex-display {
    margin: 0.65em 0;
    overflow-x: auto;
    overflow-y: hidden;
}

.lumi-msg-content.is-prose .lumi-reply-body .katex {
    font-size: 1.08em;
}

.lumi-reply-body.is-streaming-text {
    white-space: pre-wrap;
    word-break: break-word;
    contain: content;
}

.lumi-thinking-block.is-live {
    animation: none;
}

.lumi-stream-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    margin-left: 1px;
    vertical-align: text-bottom;
    background: var(--lumi-accent);
    opacity: 0.75;
    animation: lumi-cursor-blink 1.4s step-end infinite;
}

@keyframes lumi-cursor-blink {
    0%, 100% { opacity: 0.75; }
    50% { opacity: 0.15; }
}

.lumi-stream-status {
    margin-top: 8px;
    font-size: 0.78rem;
    color: var(--lumi-fg-subtle);
    animation: lumi-pulse-text 2s ease infinite;
}

.lumi-msg-content p { margin-bottom: 0.75em; }
.lumi-msg-content p:last-child { margin-bottom: 0; }
.lumi-msg-content pre {
    background: var(--lumi-code-bg);
    border: 1px solid var(--lumi-border-muted);
    border-radius: 8px;
    padding: 12px 14px;
    overflow-x: auto;
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.82rem;
    line-height: 1.5;
    margin: 0.75em 0;
}
.lumi-msg-content code {
    font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
    font-size: 0.85em;
    background: var(--lumi-code-bg);
    border: 1px solid var(--lumi-border-muted);
    border-radius: 4px;
    padding: 0.1em 0.35em;
}
.lumi-msg-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
}
.lumi-msg-content a { color: var(--lumi-accent); }

.lumi-mode-tag {
    display: inline-block;
    font-size: 0.68rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    padding: 2px 8px;
    border-radius: 999px;
    background: var(--lumi-accent-subtle);
    color: var(--lumi-accent);
    margin-top: 8px;
}

/* Downloads & terminal */
.lumi-downloads {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.lumi-download-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 8px;
    border: 1px solid var(--lumi-border);
    background: var(--lumi-bg-elevated);
    color: var(--lumi-accent);
    font-size: 0.8rem;
    text-decoration: none;
    transition: border-color 0.15s, background 0.15s;
}
.lumi-download-btn:hover {
    border-color: var(--lumi-accent);
    background: var(--lumi-accent-subtle);
}

.lumi-terminal {
    margin-top: 12px;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid var(--lumi-border);
    background: var(--lumi-bg-subtle);
}
.lumi-terminal-title {
    font-size: 0.78rem;
    color: var(--lumi-fg-muted);
    margin-bottom: 10px;
}
.lumi-terminal-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}
.lumi-terminal-cmd {
    flex: 1;
    min-width: 180px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.78rem;
    background: var(--lumi-code-bg);
    border: 1px solid var(--lumi-border-muted);
    border-radius: 6px;
    padding: 8px 10px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}
.lumi-terminal-run {
    font-family: inherit;
    font-size: 0.78rem;
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid var(--lumi-green);
    background: transparent;
    color: var(--lumi-green);
    cursor: pointer;
}
.lumi-terminal-run:hover { background: rgba(63, 185, 80, 0.1); }
.lumi-terminal-all {
    font-family: inherit;
    font-size: 0.78rem;
    padding: 6px 14px;
    border-radius: 6px;
    border: none;
    background: var(--lumi-accent-emphasis);
    color: #fff;
    cursor: pointer;
    margin-top: 4px;
}
.lumi-terminal-all:hover { opacity: 0.9; }

/* Typing indicator */
.lumi-typing-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.lumi-typing {
    display: flex;
    gap: 4px;
    padding: 4px 0;
}
.lumi-typing span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--lumi-accent);
    animation: lumi-bounce 1.2s ease infinite;
}
.lumi-typing span:nth-child(2) { animation-delay: 0.15s; }
.lumi-typing span:nth-child(3) { animation-delay: 0.3s; }

.lumi-typing-hint {
    font-size: 0.78rem;
    color: var(--lumi-fg-subtle);
    animation: lumi-pulse-text 2s ease infinite;
}

@keyframes lumi-pulse-text {
    0%, 100% { opacity: 0.55; }
    50% { opacity: 1; }
}

@keyframes lumi-bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-4px); opacity: 1; }
}

/* Composer */
.lumi-composer-wrap {
    flex-shrink: 0;
    padding: 12px 16px 16px;
    background: var(--lumi-bg-overlay);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.lumi-composer {
    position: relative;
    max-width: 768px;
    margin: 0 auto;
    border: 1px solid var(--lumi-border);
    border-radius: 14px;
    background: var(--lumi-input-bg);
    box-shadow: 0 4px 24px var(--lumi-shadow);
    overflow: hidden;
    transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.lumi-msg-extra {
    margin-top: 8px;
}

.lumi-composer-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px 0;
    flex-wrap: wrap;
}

.lumi-attach-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.lumi-attach-btn:hover:not(:disabled) {
    border-color: var(--lumi-accent);
    color: var(--lumi-accent);
    background: var(--lumi-accent-subtle);
}

.lumi-attach-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.lumi-attach-btn.is-uploading i {
    animation: lumi-brain-spin 1s linear infinite;
}

.lumi-mobile-only {
    display: none !important;
}

.lumi-camera-btn {
    display: none;
}

.lumi-msg-photo {
    margin-bottom: 10px;
}

.lumi-msg-photo img {
    display: block;
    max-width: min(100%, 280px);
    max-height: 200px;
    border-radius: 10px;
    border: 1px solid var(--lumi-border-muted);
    object-fit: contain;
    background: var(--lumi-bg-subtle);
}

.lumi-attachments {
    padding: 0 12px 8px;
}

.lumi-attachments-label {
    font-size: 0.72rem;
    color: var(--lumi-fg-subtle);
    margin-bottom: 6px;
}

.lumi-attachments-list .lumi-msg-attachments,
.lumi-msg-attachments {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.lumi-attach-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: 100%;
    padding: 4px 8px;
    border-radius: 8px;
    border: 1px solid var(--lumi-border-muted);
    background: var(--lumi-bg-subtle);
    font-size: 0.78rem;
    color: var(--lumi-fg-muted);
}

.lumi-attach-chip i { color: var(--lumi-accent); font-size: 0.82rem; }

.lumi-attach-chip-folder i { color: #e8a838; }

.lumi-folder-btn:hover:not(:disabled) i { color: #e8a838; }

.lumi-attach-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 180px;
}

.lumi-attach-size {
    font-size: 0.68rem;
    color: var(--lumi-fg-subtle);
    font-variant-numeric: tabular-nums;
}

.lumi-attach-remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    padding: 0;
    border: none;
    border-radius: 4px;
    background: transparent;
    color: var(--lumi-fg-subtle);
    cursor: pointer;
}

.lumi-attach-remove:hover {
    color: #f85149;
    background: rgba(248, 81, 73, 0.12);
}

.lumi-msg-attachments {
    margin-bottom: 8px;
}

.lumi-deepthink-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    font-family: inherit;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.15s;
}

.lumi-deepthink-toggle:hover:not(:disabled) {
    border-color: var(--lumi-purple);
    color: var(--lumi-purple);
    background: rgba(163, 113, 247, 0.08);
}

.lumi-deepthink-toggle.is-active {
    border-color: var(--lumi-purple);
    color: var(--lumi-purple);
    background: rgba(163, 113, 247, 0.14);
    box-shadow: 0 0 0 3px rgba(163, 113, 247, 0.12);
}

.lumi-deepthink-toggle:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.lumi-deepthink-toggle i {
    font-size: 0.82rem;
    transition: transform 0.25s;
}

.lumi-deepthink-toggle.is-active i {
    animation: lumi-brain-spin 2s linear infinite;
}

.lumi-topic-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    font-family: inherit;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.15s;
}

.lumi-topic-btn:hover:not(:disabled) {
    border-color: var(--lumi-accent);
    color: var(--lumi-accent);
    background: rgba(88, 166, 255, 0.08);
}

.lumi-topic-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.lumi-topic-btn i {
    font-size: 0.82rem;
}

.lumi-websearch-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    font-family: inherit;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.15s;
}

.lumi-websearch-toggle:hover:not(:disabled) {
    border-color: #3fb950;
    color: #3fb950;
    background: rgba(63, 185, 80, 0.08);
}

.lumi-websearch-toggle.is-active {
    border-color: #3fb950;
    color: #3fb950;
    background: rgba(63, 185, 80, 0.14);
    box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.12);
}

.lumi-websearch-toggle:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.lumi-websearch-toggle i {
    font-size: 0.82rem;
}

.lumi-composer.is-web-search.is-pending {
    box-shadow: 0 0 0 1px rgba(63, 185, 80, 0.35), 0 0 24px rgba(63, 185, 80, 0.08);
}

.lumi-msg.assistant.is-web-searching .lumi-typing span {
    background: #3fb950;
}

.lumi-writing-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    font-family: inherit;
    font-size: 0.78rem;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s;
}

.lumi-writing-toggle:hover:not(:disabled) {
    border-color: var(--lumi-orange);
    color: var(--lumi-orange);
    background: rgba(210, 153, 34, 0.08);
}

.lumi-writing-toggle.is-active {
    border-color: var(--lumi-orange);
    color: var(--lumi-orange);
    background: rgba(210, 153, 34, 0.14);
    box-shadow: 0 0 0 3px rgba(210, 153, 34, 0.12);
}

.lumi-writing-toggle:disabled { opacity: 0.45; cursor: not-allowed; }

.lumi-writing-panel {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
    animation: lumi-writing-in 0.25s ease;
}

.lumi-writing-panel[hidden] { display: none !important; }

@keyframes lumi-writing-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.lumi-writing-select {
    flex: 1;
    min-width: 72px;
    max-width: 120px;
    padding: 4px 8px;
    border-radius: 8px;
    border: 1px solid var(--lumi-border-muted);
    background: var(--lumi-bg-subtle);
    color: var(--lumi-fg);
    font-family: inherit;
    font-size: 0.75rem;
    cursor: pointer;
}

.lumi-writing-select:focus {
    outline: none;
    border-color: var(--lumi-orange);
}

.lumi-composer.is-writing:focus-within {
    border-color: var(--lumi-orange);
    box-shadow: 0 0 0 3px rgba(210, 153, 34, 0.12), 0 8px 28px var(--lumi-shadow);
}

.lumi-composer-toolbar {
    flex-wrap: wrap;
}

.lumi-msg-content.is-prose .lumi-reply-body {
    line-height: 1.75;
    letter-spacing: 0.01em;
}

.lumi-composer.is-dragover {
    border-color: var(--lumi-accent);
    box-shadow: 0 0 0 3px var(--lumi-accent-subtle), 0 8px 28px var(--lumi-shadow);
}

.lumi-composer.is-dragover::after {
    content: attr(data-drop-label);
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
    background: rgba(13, 17, 23, 0.72);
    color: var(--lumi-accent);
    font-size: 0.85rem;
    font-weight: 600;
    pointer-events: none;
    z-index: 2;
}

[data-theme="light"] .lumi-composer.is-dragover::after {
    background: rgba(255, 255, 255, 0.82);
}

.lumi-msg-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.lumi-msg-action,
.lumi-msg-copy,
.lumi-msg-regenerate,
.lumi-msg-share,
.lumi-msg-download {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    font-family: inherit;
    font-size: 0.72rem;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.lumi-msg-action:hover,
.lumi-msg-copy:hover,
.lumi-msg-regenerate:hover,
.lumi-msg-share:hover,
.lumi-msg-download:hover {
    color: var(--lumi-accent);
    border-color: var(--lumi-accent);
    background: var(--lumi-accent-subtle);
}

.lumi-msg-regenerate:hover {
    color: var(--lumi-purple);
    border-color: var(--lumi-purple);
    background: rgba(163, 113, 247, 0.1);
}

.lumi-msg-share:hover {
    color: #3fb950;
    border-color: #3fb950;
    background: rgba(63, 185, 80, 0.1);
}

.lumi-composer:focus-within {
    border-color: var(--lumi-accent);
    box-shadow: 0 0 0 3px var(--lumi-accent-subtle), 0 8px 28px var(--lumi-shadow);
}

.lumi-composer.is-deep-think.is-pending {
    border-color: var(--lumi-purple);
    animation: lumi-composer-deep-pulse 2s ease infinite;
}

@keyframes lumi-composer-deep-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(163, 113, 247, 0.15), 0 4px 24px var(--lumi-shadow); }
    50% { box-shadow: 0 0 0 4px rgba(163, 113, 247, 0.18), 0 8px 28px var(--lumi-shadow); }
}

.lumi-composer.is-pending {
    border-color: var(--lumi-purple);
    animation: lumi-composer-pulse 2s ease infinite;
}

@keyframes lumi-composer-pulse {
    0%, 100% { box-shadow: 0 0 0 0 var(--lumi-accent-subtle), 0 4px 24px var(--lumi-shadow); }
    50% { box-shadow: 0 0 0 4px var(--lumi-accent-subtle), 0 8px 28px var(--lumi-shadow); }
}

.lumi-composer-inner {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 10px 12px;
}

.lumi-input {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    background: transparent;
    color: var(--lumi-fg);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.5;
    max-height: 200px;
    min-height: 24px;
}
.lumi-input::placeholder { color: var(--lumi-fg-subtle); }

.lumi-voice-btn {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    border: 1px solid var(--lumi-border-muted);
    background: transparent;
    color: var(--lumi-fg-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.15s;
}

.lumi-voice-btn:hover:not(:disabled) {
    border-color: var(--lumi-purple);
    color: var(--lumi-purple);
    background: rgba(163, 113, 247, 0.08);
}

.lumi-voice-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.lumi-voice-btn.is-listening {
    border-color: var(--lumi-red);
    color: #fff;
    background: var(--lumi-red);
    box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.2);
    animation: lumi-voice-pulse 1.2s ease-in-out infinite;
}

@keyframes lumi-voice-pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.2); }
    50% { transform: scale(1.05); box-shadow: 0 0 0 6px rgba(248, 81, 73, 0.12); }
}

.lumi-composer.is-voice-listening {
    border-color: rgba(248, 81, 73, 0.55);
    box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.12), 0 8px 28px var(--lumi-shadow);
}

.lumi-send-btn {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: none;
    background: var(--lumi-accent-emphasis);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.15s, transform 0.15s;
}
.lumi-send-btn:hover:not(:disabled) { opacity: 0.9; transform: scale(1.04); }
.lumi-send-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.lumi-send-btn.stop { background: var(--lumi-red); }

.lumi-error-toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 10px 18px;
    border-radius: 10px;
    border: 1px solid var(--lumi-red);
    background: var(--lumi-bg-elevated);
    color: var(--lumi-red);
    font-size: 0.85rem;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s, transform 0.2s;
}
.lumi-error-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.lumi-sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 40;
}

/* Scrollbar */
.lumi-messages::-webkit-scrollbar,
.lumi-history-list::-webkit-scrollbar { width: 6px; }
.lumi-messages::-webkit-scrollbar-thumb,
.lumi-history-list::-webkit-scrollbar-thumb {
    background: var(--lumi-scrollbar);
    border-radius: 3px;
}

@media (max-width: 768px) {
    .lumi-app {
        padding-top: env(safe-area-inset-top, 0px);
    }

    .lumi-header {
        height: 52px;
        padding-left: max(10px, env(safe-area-inset-left, 0px));
        padding-right: max(10px, env(safe-area-inset-right, 0px));
        gap: 8px;
    }

    .lumi-header-left {
        gap: 6px;
        min-width: 0;
        flex: 1;
    }

    .lumi-header-right {
        gap: 6px;
        flex-shrink: 0;
    }

    .lumi-history-btn {
        padding: 0 10px;
        flex-shrink: 0;
    }

    .lumi-history-btn.is-active {
        border-color: var(--lumi-accent);
        color: var(--lumi-accent);
        background: var(--lumi-accent-subtle);
    }

    .lumi-mobile-new-chat {
        background: var(--lumi-accent-emphasis);
        border-color: transparent;
        color: #fff;
    }

    .lumi-mobile-new-chat:hover {
        opacity: 0.92;
        color: #fff;
    }

    .lumi-logo span {
        font-size: 0.9rem;
    }

    .lumi-status {
        padding: 3px 8px;
        font-size: 0.7rem;
    }

    .lumi-status-text {
        display: none;
    }

    .lumi-main {
        margin-left: 0 !important;
    }

    .lumi-messages {
        padding: 12px 10px 10px;
    }

    .lumi-welcome {
        padding: 28px 10px 12px;
    }

    .lumi-welcome h1 {
        font-size: 1.55rem;
    }

    .lumi-composer-wrap {
        padding: 0 10px max(10px, env(safe-area-inset-bottom, 0px));
    }

    .lumi-composer-toolbar {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: 6px;
        padding-bottom: 4px;
    }

    .lumi-composer-toolbar::-webkit-scrollbar {
        display: none;
    }

    .lumi-deepthink-toggle span,
    .lumi-websearch-toggle span,
    .lumi-writing-toggle span,
    .lumi-topic-btn span {
        display: none;
    }

    .lumi-deepthink-toggle,
    .lumi-websearch-toggle,
    .lumi-writing-toggle,
    .lumi-topic-btn {
        padding: 5px 10px;
        flex-shrink: 0;
    }

    .lumi-composer-inner .lumi-input {
        font-size: 16px;
    }

    .lumi-send-btn,
    .lumi-voice-btn {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
    }

    .lumi-error-toast {
        bottom: max(88px, calc(72px + env(safe-area-inset-bottom, 0px)));
        max-width: calc(100vw - 32px);
    }

    .lumi-sidebar {
        position: fixed;
        top: calc(52px + env(safe-area-inset-top, 0px));
        left: 0;
        bottom: 0;
        z-index: 50;
        width: min(86vw, 320px) !important;
        transform: translateX(-100%);
        opacity: 1 !important;
        padding: 12px !important;
        padding-bottom: max(12px, env(safe-area-inset-bottom, 0px)) !important;
        border-right-width: 1px !important;
        pointer-events: auto;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: 4px 0 24px var(--lumi-shadow);
    }
    .lumi-body.sidebar-collapsed .lumi-sidebar {
        transform: translateX(-100%);
    }
    .lumi-sidebar.open {
        transform: translateX(0) !important;
        pointer-events: auto;
    }
    .lumi-sidebar-head {
        gap: 6px;
    }
    .lumi-sidebar-close {
        display: flex;
    }
    .lumi-sidebar-collapse { display: none; }
    .lumi-sidebar-expand { display: none !important; }
    .lumi-sidebar-backdrop.show { display: block; }
    .lumi-header .hide-mobile { display: none; }
    .lumi-mobile-only { display: inline-flex !important; }
    .lumi-camera-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 32px;
        height: 32px;
        border-radius: 8px;
        border: 1px solid var(--lumi-border-muted);
        background: transparent;
        color: var(--lumi-fg-muted);
        font-size: 0.9rem;
        cursor: pointer;
        transition: border-color 0.2s, color 0.2s, background 0.2s, box-shadow 0.2s;
    }
    .lumi-camera-btn:hover:not(:disabled) {
        border-color: #3fb950;
        color: #3fb950;
        background: rgba(63, 185, 80, 0.1);
    }
    .lumi-camera-btn.is-uploading {
        border-color: #3fb950;
        color: #3fb950;
        box-shadow: 0 0 0 3px rgba(63, 185, 80, 0.15);
    }
    .lumi-camera-btn.is-uploading i {
        animation: lumi-brain-spin 1s linear infinite;
    }
    .lumi-camera-btn:disabled {
        opacity: 0.45;
        cursor: not-allowed;
    }
    .lumi-suggestion.lumi-mobile-only {
        display: inline-flex;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}