:root {
    --dc-bg: #f5f7fa;
    --dc-bg-soft: #ffffff;
    --dc-bg-elevated: #ffffff;
    --dc-text: #0f172a;
    --dc-muted: #64748b;
    --dc-line: #dbe3ee;
    --dc-line-strong: #cbd5e1;
    --dc-accent: #0f766e;
    --dc-accent-soft: #dcf6f3;
    --dc-danger: #b91c1c;
    --dc-shadow-soft: 0 14px 40px rgba(15, 23, 42, 0.08);
    --dc-shadow-card: 0 10px 28px rgba(15, 23, 42, 0.06);
    --dc-user-bubble: linear-gradient(140deg, #0f172a 0%, #1f2937 100%);
    --dc-user-text: #f8fafc;
    --dc-user-chip-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(240, 245, 250, 0.98));
    --dc-user-chip-border: rgba(203, 213, 225, 0.92);
    --dc-user-chip-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

[data-theme="dark"] {
    --dc-bg: #0b1220;
    --dc-bg-soft: #111827;
    --dc-bg-elevated: #132231;
    --dc-text: #e5e7eb;
    --dc-muted: #98abc0;
    --dc-line: #243244;
    --dc-line-strong: #2f435c;
    --dc-accent: #2dd4bf;
    --dc-accent-soft: rgba(45, 212, 191, 0.15);
    --dc-danger: #fca5a5;
    --dc-shadow-soft: 0 16px 38px rgba(2, 8, 23, 0.34);
    --dc-shadow-card: 0 14px 32px rgba(2, 8, 23, 0.28);
    --dc-user-bubble: linear-gradient(140deg, #143042 0%, #1b3d54 100%);
    --dc-user-text: #e6f5f3;
    --dc-user-chip-bg: linear-gradient(180deg, rgba(20, 40, 56, 0.96), rgba(17, 31, 45, 0.98));
    --dc-user-chip-border: rgba(61, 88, 112, 0.92);
    --dc-user-chip-shadow: 0 14px 28px rgba(2, 8, 23, 0.22);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--dc-text);
    background: var(--dc-bg);
    font-family: "MiSans", "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body.deep-chat-body {
    height: 100vh;
    overflow: hidden;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    border: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
}

.deep-chat-backdrop {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
            radial-gradient(60vw 44vh at -8% -6%, rgba(15, 118, 110, 0.15), transparent 65%),
            radial-gradient(46vw 36vh at 108% 0%, rgba(15, 23, 42, 0.11), transparent 68%),
            radial-gradient(50vw 42vh at 50% 110%, rgba(30, 64, 175, 0.09), transparent 70%);
}

[data-theme="dark"] .deep-chat-backdrop {
    background:
            radial-gradient(60vw 44vh at -8% -6%, rgba(45, 212, 191, 0.16), transparent 65%),
            radial-gradient(46vw 36vh at 108% 0%, rgba(56, 189, 248, 0.12), transparent 68%),
            radial-gradient(50vw 42vh at 50% 110%, rgba(13, 34, 48, 0.34), transparent 70%);
}

.deep-chat-page {
    position: relative;
    z-index: 1;
    width: min(1120px, 92%);
    margin: 30px auto 48px;
    height: calc(var(--dc-app-height, 100vh) - 52px);
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.deep-chat-page .global-topbar {
    margin-bottom: 14px;
    padding: 0;
}

@media (max-width: 820px) {
    .deep-chat-page .global-topbar {
        margin-bottom: 10px;
    }
}

@media (max-width: 640px) {
    .deep-chat-page .global-topbar {
        margin-bottom: 8px;
    }
}

.deep-chat-shell {
    position: relative;
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 14px;
    flex: 1;
    min-height: 0;
    height: 100%;
}

.deep-chat-sidebar {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--dc-line);
    border-radius: 20px;
    background: color-mix(in srgb, var(--dc-bg-elevated) 92%, transparent);
    box-shadow: var(--dc-shadow-card);
    overflow: hidden;
    backdrop-filter: blur(8px);
    min-height: 0;
}

.deep-chat-sidebar-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 16px;
    border-bottom: 1px solid var(--dc-line);
}

.deep-chat-kicker {
    margin: 0;
    color: var(--dc-muted);
    font-size: 11px;
    letter-spacing: .8px;
    text-transform: uppercase;
}

.deep-chat-sidebar-head h1 {
    margin: 4px 0 0;
    font-size: 22px;
    line-height: 1.2;
    letter-spacing: .2px;
}

.deep-chat-new-btn {
    border: 1px solid var(--dc-line-strong);
    background: var(--dc-bg-soft);
    color: var(--dc-text);
    border-radius: 10px;
    height: 34px;
    padding: 0 12px;
    cursor: pointer;
    font-size: 13px;
    transition: transform .15s ease, border-color .2s ease, background .2s ease;
}

.deep-chat-new-btn:hover {
    transform: translateY(-1px);
    border-color: var(--dc-accent);
    background: var(--dc-accent-soft);
}

.deep-chat-sidebar-search-wrap {
    padding: 12px 16px;
    border-bottom: 1px solid var(--dc-line);
}

.deep-chat-sidebar-search {
    width: 100%;
    height: 36px;
    border: 1px solid var(--dc-line-strong);
    border-radius: 10px;
    padding: 0 10px;
    background: var(--dc-bg-soft);
    color: var(--dc-text);
    font-size: 13px;
    outline: none;
}

.deep-chat-sidebar-search:focus {
    border-color: var(--dc-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--dc-accent) 18%, transparent);
}

.deep-chat-session-list {
    flex: 1;
    overflow: auto;
    padding: 10px;
}

.deep-chat-session-list::-webkit-scrollbar {
    width: 8px;
}

.deep-chat-session-list::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: color-mix(in srgb, var(--dc-muted) 45%, transparent);
}

.deep-session-item {
    display: flex;
    align-items: stretch;
    gap: 8px;
    margin-bottom: 8px;
}

.deep-session-main {
    flex: 1;
    border: 1px solid var(--dc-line);
    border-radius: 14px;
    padding: 12px 12px 11px;
    text-align: left;
    background: var(--dc-bg-soft);
    color: inherit;
    cursor: pointer;
    min-height: 88px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: border-color .2s ease, transform .15s ease, background .2s ease, box-shadow .2s ease;
}

.deep-session-item.active .deep-session-main {
    border-color: color-mix(in srgb, var(--dc-accent) 72%, var(--dc-line));
    background: color-mix(in srgb, var(--dc-accent-soft) 76%, var(--dc-bg-soft));
}

.deep-session-title {
    margin: 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--dc-text);
    line-height: 1.35;
    overflow: hidden;
    min-width: 0;
}

.deep-session-meta {
    margin-top: 7px;
    font-size: 11px;
    color: var(--dc-muted);
    display: flex;
    justify-content: space-between;
    gap: 8px;
}

.deep-session-preview {
    margin-top: 6px;
    color: var(--dc-muted);
    font-size: 12px;
    overflow: hidden;
    line-height: 1.35;
    min-width: 0;
}

.deep-session-text-track {
    position: relative;
    display: block;
    overflow: hidden;
    white-space: nowrap;
    min-width: 0;
}

.deep-session-text-inner {
    display: inline-block;
    min-width: 100%;
    transform: translateX(0);
}

.deep-session-del {
    width: 36px;
    flex: 0 0 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid color-mix(in srgb, var(--dc-line-strong) 86%, transparent);
    border-radius: 12px;
    background: color-mix(in srgb, var(--dc-bg-soft) 88%, transparent);
    color: var(--dc-muted);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    backdrop-filter: blur(8px);
    transition: border-color .2s ease, color .2s ease, background .2s ease, transform .15s ease, box-shadow .2s ease;
}

.deep-session-del svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

[data-theme="dark"] .deep-session-del {
    background: color-mix(in srgb, var(--dc-bg-soft) 76%, transparent);
}

.deep-chat-main {
    border: 1px solid var(--dc-line);
    border-radius: 20px;
    background: color-mix(in srgb, var(--dc-bg-elevated) 92%, transparent);
    box-shadow: var(--dc-shadow-soft);
    display: flex;
    flex-direction: column;
    min-height: 0;
    height: 100%;
    overflow: hidden;
    backdrop-filter: blur(9px);
}

.deep-chat-main-head {
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--dc-line);
    padding: 12px 16px;
}

.deep-chat-sidebar-toggle {
    width: 34px;
    height: 34px;
    border: 1px solid var(--dc-line);
    border-radius: 9px;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--dc-bg-soft);
    color: var(--dc-text);
    cursor: pointer;
}

.deep-chat-sidebar-toggle svg {
    width: 17px;
    height: 17px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
}

.deep-chat-main-title-wrap {
    min-width: 0;
    flex: 1;
}

.deep-chat-main-title-wrap h2 {
    margin: 0;
    font-size: 17px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.deep-chat-main-title-wrap p {
    margin: 4px 0 0;
    font-size: 12px;
    color: var(--dc-muted);
}

.deep-chat-head-tools {
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
}

.deep-chat-model-picker {
    display: inline-flex;
    align-items: center;
    gap: 0;
    max-width: min(100%, 220px);
    padding: 0 6px 0 8px;
    border: 1px solid color-mix(in srgb, var(--dc-line) 72%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, var(--dc-bg-soft) 78%, transparent);
    box-shadow: 0 6px 14px rgba(15, 23, 42, 0.04);
}

.deep-chat-model-picker:focus-within {
    border-color: color-mix(in srgb, var(--dc-accent) 52%, var(--dc-line));
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--dc-accent) 10%, transparent);
}

.deep-chat-model-label {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    margin-right: 6px;
    font-size: 11px;
    color: var(--dc-muted);
    white-space: nowrap;
}

.deep-chat-model-select-wrap {
    position: relative;
    display: flex;
    align-items: center;
    min-width: 0;
}

.deep-chat-model-select {
    appearance: none;
    -webkit-appearance: none;
    width: 100%;
    min-width: 116px;
    max-width: 100%;
    height: 28px;
    padding: 0 20px 0 0;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--dc-text);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
}

.deep-chat-model-select-wrap svg {
    position: absolute;
    right: 4px;
    width: 11px;
    height: 11px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    color: var(--dc-muted);
    pointer-events: none;
}

[data-theme="dark"] .deep-chat-model-picker {
    background: color-mix(in srgb, var(--dc-bg-soft) 82%, transparent);
    box-shadow: 0 8px 18px rgba(2, 8, 23, 0.18);
}

.deep-chat-stop-btn {
    border: 1px solid color-mix(in srgb, var(--dc-danger) 48%, var(--dc-line));
    background: color-mix(in srgb, var(--dc-danger) 8%, var(--dc-bg-soft));
    color: var(--dc-danger);
    border-radius: 10px;
    height: 34px;
    padding: 0 12px;
    font-size: 13px;
    cursor: pointer;
}

.deep-chat-stop-btn:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.deep-chat-feed {
    flex: 1;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 18px 18px 88px;
    overscroll-behavior: contain;
    overflow-anchor: none;
    scroll-behavior: smooth;
    touch-action: pan-y pinch-zoom;
}

.deep-chat-scroll-bottom {
    position: absolute;
    right: 18px;
    bottom: 96px;
    z-index: 4;
    width: 42px;
    height: 42px;
    border: 1px solid color-mix(in srgb, var(--dc-accent) 34%, var(--dc-line));
    border-radius: 999px;
    background: color-mix(in srgb, var(--dc-bg-soft) 92%, transparent);
    color: var(--dc-text);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.14);
    backdrop-filter: blur(12px);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity .2s ease, transform .2s ease, border-color .2s ease, background .2s ease;
}

.deep-chat-scroll-bottom.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.deep-chat-scroll-bottom:hover {
    border-color: color-mix(in srgb, var(--dc-accent) 72%, var(--dc-line));
    background: color-mix(in srgb, var(--dc-accent-soft) 76%, var(--dc-bg-soft));
    color: color-mix(in srgb, var(--dc-accent) 78%, var(--dc-text));
}

.deep-chat-scroll-bottom svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

[data-theme="dark"] .deep-chat-scroll-bottom {
    box-shadow: 0 18px 36px rgba(2, 6, 23, 0.42);
}

.deep-chat-feed::-webkit-scrollbar {
    width: 10px;
}

.deep-chat-feed::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: color-mix(in srgb, var(--dc-muted) 36%, transparent);
}

.deep-chat-empty {
    width: min(540px, 100%);
    margin: 8vh auto 0;
    text-align: center;
    border: 1px dashed var(--dc-line-strong);
    border-radius: 18px;
    padding: 30px 18px;
    background: color-mix(in srgb, var(--dc-bg-soft) 85%, transparent);
}

.deep-chat-empty h3 {
    margin: 0;
    font-size: 20px;
}

.deep-chat-empty p {
    margin: 10px 0 0;
    color: var(--dc-muted);
    font-size: 14px;
}

.deep-chat-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 16px;
}

.deep-chat-row.user {
    justify-content: flex-end;
}

.deep-chat-row.user .deep-chat-avatar {
    order: 2;
}

.deep-chat-row.user .deep-chat-msg-main {
    align-items: flex-end;
}

.deep-chat-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    flex: 0 0 34px;
    border: 1px solid var(--dc-line);
    background: #dbe5ef;
    object-fit: cover;
}

.deep-chat-msg-main {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: min(78ch, 82%);
}

.deep-chat-row.user .deep-chat-msg-main {
    max-width: min(62ch, 82%);
}

.deep-chat-msg-role {
    font-size: 12px;
    color: var(--dc-muted);
    margin-bottom: 4px;
}

.deep-chat-bubble {
    width: 100%;
    border: 1px solid var(--dc-line);
    border-radius: 16px;
    background: var(--dc-bg-soft);
    color: var(--dc-text);
    padding: 12px 14px;
    line-height: 1.72;
    font-size: 14px;
    overflow-wrap: anywhere;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.deep-chat-bubble.is-pending {
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 52px;
}

.deep-chat-bubble.is-streaming-raw {
    white-space: pre-wrap;
    word-break: break-word;
    font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    line-height: 1.68;
}

.deep-chat-pending {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--dc-muted);
}

.deep-chat-pending-dots {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.deep-chat-pending-dots i {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--dc-accent) 72%, white);
    animation: deep-chat-pulse 1.2s ease-in-out infinite;
}

.deep-chat-pending-dots i:nth-child(2) {
    animation-delay: .16s;
}

.deep-chat-pending-dots i:nth-child(3) {
    animation-delay: .32s;
}

.deep-chat-pending-text {
    font-size: 13px;
    letter-spacing: .2px;
}

.deep-chat-row.user .deep-chat-bubble {
    border-color: transparent;
    background: var(--dc-user-bubble);
    color: var(--dc-user-text);
}

.deep-chat-bubble.markdown-body p {
    margin: 0 0 10px;
    white-space: pre-wrap;
}

.deep-chat-bubble.markdown-body p:last-child {
    margin-bottom: 0;
}

.deep-chat-bubble.markdown-body h1,
.deep-chat-bubble.markdown-body h2,
.deep-chat-bubble.markdown-body h3,
.deep-chat-bubble.markdown-body h4,
.deep-chat-bubble.markdown-body h5,
.deep-chat-bubble.markdown-body h6 {
    margin: 0 0 10px;
    line-height: 1.4;
}

.deep-chat-bubble.markdown-body ul,
.deep-chat-bubble.markdown-body ol {
    margin: 0 0 10px 20px;
    padding: 0;
}

.deep-chat-bubble.markdown-body li {
    margin: 2px 0;
}

.deep-chat-bubble.markdown-body blockquote {
    margin: 0 0 10px;
    padding-left: 10px;
    border-left: 3px solid color-mix(in srgb, var(--dc-accent) 55%, var(--dc-line));
    color: var(--dc-muted);
}

.deep-chat-row.user .deep-chat-bubble.markdown-body blockquote {
    border-left-color: rgba(255, 255, 255, 0.35);
    color: rgba(248, 250, 252, 0.85);
}

.deep-chat-bubble.markdown-body code {
    font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: 12px;
    background: color-mix(in srgb, var(--dc-line) 36%, transparent);
    border-radius: 6px;
    padding: 2px 5px;
}

.deep-chat-row.user .deep-chat-bubble.markdown-body code {
    background: rgba(255, 255, 255, 0.15);
}

.deep-chat-bubble.markdown-body pre code {
    background: transparent;
    padding: 0;
    border-radius: 0;
}

.deep-chat-bubble.markdown-body pre {
    margin: 0 0 10px;
    overflow: auto;
}

.deep-chat-bubble.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 10px;
    font-size: 13px;
}

.deep-chat-bubble.markdown-body th,
.deep-chat-bubble.markdown-body td {
    border: 1px solid color-mix(in srgb, var(--dc-line) 92%, #fff);
    padding: 8px 10px;
    text-align: left;
    vertical-align: top;
}

.deep-chat-bubble.markdown-body th {
    background: color-mix(in srgb, var(--dc-line) 34%, transparent);
    font-weight: 700;
}

.deep-chat-row.user .deep-chat-bubble.markdown-body th,
.deep-chat-row.user .deep-chat-bubble.markdown-body td {
    border-color: rgba(255, 255, 255, 0.22);
}

.deep-chat-row.user .deep-chat-bubble.markdown-body th {
    background: rgba(255, 255, 255, 0.14);
}

.deep-chat-bubble.markdown-body hr {
    border: 0;
    border-top: 1px solid var(--dc-line);
    margin: 12px 0;
}

.deep-chat-row.user .deep-chat-bubble.markdown-body hr {
    border-top-color: rgba(255, 255, 255, 0.24);
}

.deep-chat-bubble.markdown-body img {
    max-width: 100%;
    border-radius: 10px;
}

.deep-chat-bubble.markdown-body a {
    color: var(--dc-accent);
}

.deep-chat-row.user .deep-chat-bubble.markdown-body a {
    color: #bae6fd;
}

.deep-chat-msg-time {
    margin-top: 4px;
    font-size: 11px;
    color: var(--dc-muted);
}

.deep-chat-composer {
    border-top: 1px solid var(--dc-line);
    padding: 12px;
    background: color-mix(in srgb, var(--dc-bg-soft) 88%, transparent);
}

.deep-chat-input {
    width: 100%;
    border: 1px solid var(--dc-line-strong);
    border-radius: 14px;
    background: var(--dc-bg-soft);
    color: var(--dc-text);
    padding: 12px;
    resize: none;
    min-height: 52px;
    max-height: 220px;
    line-height: 1.6;
    font-size: 14px;
    outline: none;
}

.deep-chat-input:focus {
    border-color: var(--dc-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--dc-accent) 20%, transparent);
}

.deep-chat-composer-foot {
    margin-top: 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    color: var(--dc-muted);
    font-size: 12px;
}

.deep-chat-send-btn {
    border: 1px solid color-mix(in srgb, var(--dc-accent) 40%, var(--dc-line));
    border-radius: 10px;
    background: linear-gradient(145deg, color-mix(in srgb, var(--dc-accent) 18%, #fff), color-mix(in srgb, var(--dc-accent) 28%, #fff));
    color: #0b2826;
    min-width: 92px;
    height: 34px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: transform .15s ease, filter .2s ease;
}

.deep-chat-send-btn:hover {
    transform: translateY(-1px);
    filter: saturate(1.06);
}

.deep-chat-send-btn:disabled,
.deep-chat-send-btn.is-disabled,
.deep-chat-send-btn[aria-disabled="true"] {
    opacity: .58;
    cursor: not-allowed;
    transform: none;
}

.deep-chat-mobile-composer,
.deep-chat-mobile-composer[hidden] {
    display: none !important;
}

.deep-chat-sidebar-overlay {
    display: none;
}

.deep-chat-toast {
    position: fixed;
    right: 20px;
    bottom: 24px;
    z-index: 60;
    border: 1px solid var(--dc-line-strong);
    border-radius: 10px;
    padding: 10px 12px;
    background: var(--dc-bg-soft);
    color: var(--dc-text);
    box-shadow: var(--dc-shadow-card);
    font-size: 13px;
    max-width: min(68vw, 420px);
    opacity: 0;
    transform: translateY(6px);
    pointer-events: none;
    transition: opacity .22s ease, transform .22s ease;
}

.deep-chat-toast.show {
    opacity: 1;
    transform: translateY(0);
}

.deep-chat-toast.error {
    border-color: color-mix(in srgb, var(--dc-danger) 40%, var(--dc-line));
    color: var(--dc-danger);
}

.deep-chat-shell {
    width: 100vw;
    margin-left: calc(50% - 50vw);
    grid-template-columns: 292px minmax(0, 1fr);
    gap: 0;
}

.deep-chat-sidebar {
    position: relative;
    grid-column: 1;
    grid-row: 1;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
    overflow: hidden;
    padding: 18px 14px 18px 16px;
    border-right: 1px solid color-mix(in srgb, var(--dc-line) 78%, transparent);
    transition: transform .22s ease, opacity .2s ease;
}

.deep-chat-sidebar-head-actions {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.deep-chat-sidebar-collapse,
.deep-chat-sidebar-dock {
    width: 36px;
    height: 36px;
    border: 0;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: color-mix(in srgb, var(--dc-bg-soft) 72%, transparent);
    color: var(--dc-text);
    cursor: pointer;
    transition: background .2s ease, transform .15s ease, opacity .2s ease;
}

.deep-chat-sidebar-collapse:hover,
.deep-chat-sidebar-dock:hover {
    background: color-mix(in srgb, var(--dc-bg-soft) 96%, transparent);
    transform: translateY(-1px);
}

.deep-chat-sidebar-collapse svg,
.deep-chat-sidebar-dock svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.deep-chat-sidebar-dock {
    display: none;
    position: absolute;
    left: 12px;
    top: 18px;
    z-index: 6;
    margin-top: 0;
}

.deep-chat-shell.sidebar-collapsed {
    grid-template-columns: 0 minmax(0, 1fr);
}

.deep-chat-shell.sidebar-collapsed .deep-chat-sidebar {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-28px);
}

.deep-chat-shell.sidebar-collapsed .deep-chat-sidebar-dock {
    display: inline-flex;
}

.deep-chat-shell.sidebar-collapsed .deep-chat-main {
    grid-column: 2;
    padding-left: clamp(8px, 2vw, 18px);
}

.deep-chat-sidebar-head {
    padding: 4px 0 14px;
    border-bottom: 0;
}

.deep-chat-kicker {
    font-size: 10px;
    letter-spacing: 1.1px;
}

.deep-chat-sidebar-head h1 {
    font-size: 24px;
    letter-spacing: -.02em;
}

.deep-chat-new-btn {
    border: 0;
    background: color-mix(in srgb, var(--dc-accent-soft) 84%, transparent);
    color: color-mix(in srgb, var(--dc-accent) 82%, var(--dc-text));
    border-radius: 999px;
    height: 36px;
    padding: 0 14px;
    font-weight: 700;
}

.deep-chat-new-btn:hover {
    background: color-mix(in srgb, var(--dc-accent-soft) 100%, transparent);
}

.deep-chat-sidebar-search-wrap {
    padding: 0 0 14px;
    border-bottom: 0;
}

.deep-chat-sidebar-search {
    height: 42px;
    border: 0;
    border-radius: 16px;
    padding: 0 14px;
    background: color-mix(in srgb, var(--dc-bg-soft) 68%, transparent);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--dc-line) 84%, transparent);
}

.deep-chat-sidebar-search:focus {
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--dc-accent) 56%, transparent), 0 0 0 4px color-mix(in srgb, var(--dc-accent) 12%, transparent);
}

.deep-chat-session-list {
    padding: 2px 0 0;
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
    scrollbar-gutter: stable;
    overscroll-behavior: contain;
}

.deep-chat-session-list::-webkit-scrollbar {
    width: 8px;
}

.deep-chat-session-list.is-scrolling {
    scrollbar-color: color-mix(in srgb, var(--dc-muted) 44%, transparent) transparent;
}

.deep-chat-session-list::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: transparent;
}

.deep-chat-session-list.is-scrolling::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--dc-muted) 44%, transparent);
}

.deep-session-item {
    gap: 10px;
    margin-bottom: 2px;
}

.deep-session-main {
    min-height: 76px;
    padding: 12px 10px;
    border: 0;
    border-radius: 18px;
    background: transparent;
    box-shadow: none;
}

.deep-session-item.active .deep-session-main {
    border-color: transparent;
    background: color-mix(in srgb, var(--dc-accent-soft) 72%, transparent);
}

.deep-session-title {
    font-size: 13px;
}

.deep-session-meta {
    margin-top: 6px;
}

.deep-session-preview {
    margin-top: 5px;
}

.deep-session-del {
    width: 34px;
    flex-basis: 34px;
    border: 0;
    border-radius: 14px;
    background: transparent;
    backdrop-filter: none;
    box-shadow: none;
    opacity: 0;
    transform: translateX(-4px);
    pointer-events: none;
}

.deep-session-item.active .deep-session-del {
    opacity: 1;
    transform: translateX(0);
    pointer-events: auto;
}

[data-theme="dark"] .deep-session-del {
    background: transparent;
}

@media (hover: hover) and (pointer: fine) {
    .deep-session-main:hover {
        border-color: color-mix(in srgb, var(--dc-accent) 56%, var(--dc-line));
        transform: translateY(-1px);
        box-shadow: 0 10px 22px rgba(15, 23, 42, 0.08);
    }

    .deep-session-del:hover {
        color: var(--dc-danger);
        border-color: color-mix(in srgb, var(--dc-danger) 50%, var(--dc-line));
        background: color-mix(in srgb, var(--dc-danger) 8%, var(--dc-bg-soft));
        transform: translateY(-1px);
        box-shadow: 0 10px 18px rgba(185, 28, 28, 0.12);
    }

    [data-theme="dark"] .deep-session-main:hover {
        box-shadow: 0 12px 24px rgba(2, 6, 23, 0.28);
    }

    [data-theme="dark"] .deep-session-del:hover {
        box-shadow: 0 12px 20px rgba(127, 29, 29, 0.24);
    }

    .deep-session-main:hover {
        transform: none;
        border-color: transparent;
        box-shadow: none;
        background: color-mix(in srgb, var(--dc-bg-soft) 66%, transparent);
    }

    .deep-session-item:hover .deep-session-del {
        opacity: 1;
        transform: translateX(0);
        pointer-events: auto;
    }

    .deep-session-del:hover {
        transform: none;
        box-shadow: none;
        background: color-mix(in srgb, var(--dc-danger) 10%, transparent);
    }

    [data-theme="dark"] .deep-session-main:hover {
        box-shadow: none;
    }

    [data-theme="dark"] .deep-session-del:hover {
        box-shadow: none;
        background: color-mix(in srgb, var(--dc-danger) 12%, transparent);
    }
}

.deep-chat-main {
    grid-column: 2;
    grid-row: 1;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
    backdrop-filter: none;
    min-width: 0;
    padding: 0 0 0 clamp(18px, 3vw, 34px);
}

.deep-chat-main-head {
    gap: 14px;
    border-bottom: 0;
    padding: 8px 0 18px;
}

.deep-chat-sidebar-toggle {
    border: 0;
    border-radius: 14px;
    background: color-mix(in srgb, var(--dc-bg-soft) 72%, transparent);
}

.deep-chat-main-title-wrap h2 {
    font-size: 16px;
    letter-spacing: -.01em;
}

.deep-chat-main-title-wrap p {
    margin-top: 3px;
}

.deep-chat-main-title-wrap {
    display: none;
}

.deep-chat-main-head {
    justify-content: space-between;
}

.deep-chat-head-tools {
    flex: 0 1 auto;
    padding-right: clamp(6px, 1vw, 12px);
}

.deep-chat-model-picker {
    max-width: min(100%, 188px);
    padding-right: 5px;
    background: color-mix(in srgb, var(--dc-bg-soft) 72%, transparent);
    box-shadow: none;
}

.deep-chat-main.is-empty-view .deep-chat-main-title-wrap h2 {
    color: transparent;
}

.deep-chat-main.is-empty-view .deep-chat-main-title-wrap p {
    opacity: 0;
}

.deep-chat-main.is-empty-view .deep-chat-main-actions {
    opacity: 0;
    pointer-events: none;
}

.deep-chat-stop-btn {
    border: 0;
    background: color-mix(in srgb, var(--dc-danger) 10%, transparent);
    border-radius: 999px;
    height: 36px;
    padding: 0 14px;
    font-weight: 600;
}

.deep-chat-feed {
    padding: 14px 0 28px 0;
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
    scrollbar-gutter: stable;
    overscroll-behavior: contain;
}

.deep-chat-feed::-webkit-scrollbar {
    width: 10px;
}

.deep-chat-feed.is-scrolling {
    scrollbar-color: color-mix(in srgb, var(--dc-muted) 38%, transparent) transparent;
}

.deep-chat-feed::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: transparent;
}

.deep-chat-feed.is-scrolling::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--dc-muted) 38%, transparent);
}

.deep-chat-main.is-empty-view .deep-chat-feed {
    flex: 0 0 auto;
    overflow: visible;
    padding: 8vh 0 18px;
}

.deep-chat-main.has-chat-messages .deep-chat-feed {
    padding-top: 6px;
}

.deep-chat-scroll-bottom {
    right: 8px;
    bottom: 116px;
}

.deep-chat-empty {
    width: min(680px, 100%);
    margin: 0 auto;
    text-align: center;
    border: 0;
    border-radius: 0;
    padding: 0;
    background: transparent;
}

.deep-chat-empty-title-row {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    max-width: 100%;
}

.deep-chat-empty-badge {
    width: 52px;
    height: 52px;
    margin: 0;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 30% 30%, rgba(255,255,255,0.95), transparent 42%),
        linear-gradient(145deg, color-mix(in srgb, var(--dc-accent) 16%, #fff), color-mix(in srgb, var(--dc-accent) 36%, #fff));
    color: #0b2826;
    box-shadow: 0 16px 30px rgba(15, 118, 110, 0.16);
}

[data-theme="dark"] .deep-chat-empty-badge {
    background:
        radial-gradient(circle at 30% 30%, rgba(255,255,255,0.14), transparent 38%),
        linear-gradient(145deg, rgba(45, 212, 191, 0.24), rgba(56, 189, 248, 0.26));
    color: #d8fffb;
    box-shadow: 0 18px 34px rgba(2, 8, 23, 0.32);
}

.deep-chat-empty-badge svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.55;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.deep-chat-empty h3 {
    margin: 0;
    font-size: clamp(24px, 4vw, 34px);
    font-weight: 500;
    letter-spacing: -.025em;
    line-height: 1.12;
}

.deep-chat-empty p:last-child {
    max-width: 560px;
    margin: 18px auto 0;
    font-size: 15px;
    line-height: 1.75;
}

.deep-chat-sidebar-empty {
    padding: 18px 12px;
    text-align: center;
    color: var(--dc-muted);
}

.deep-chat-sidebar-empty h3 {
    margin: 0;
    font-size: 14px;
    color: var(--dc-text);
}

.deep-chat-sidebar-empty p {
    margin: 8px 0 0;
    font-size: 12px;
    line-height: 1.6;
}

.deep-chat-row {
    width: 100%;
    max-width: min(920px, 100%);
    margin: 0 auto 30px;
    padding-right: 118px;
    gap: 0;
}

.deep-chat-avatar {
    display: none;
}

.deep-chat-msg-main {
    width: min(760px, 100%);
    max-width: min(760px, 100%);
}

.deep-chat-row.user .deep-chat-msg-main {
    width: auto;
    max-width: min(620px, calc(100% - 24px));
    margin-left: auto;
}

.deep-chat-msg-role,
.deep-chat-msg-time {
    display: none;
}

.deep-chat-row.user {
    padding-right: 24px;
    padding-left: 118px;
}

.deep-chat-bubble {
    border: 0;
    background: transparent;
    padding: 0;
    box-shadow: none;
    font-size: 15px;
    line-height: 1.82;
}

.deep-chat-row.user .deep-chat-bubble {
    background: var(--dc-user-chip-bg);
    border-radius: 22px;
    padding: 14px 18px;
    box-shadow: var(--dc-user-chip-shadow), inset 0 0 0 1px var(--dc-user-chip-border);
    color: var(--dc-text);
}

.deep-chat-row.user .deep-chat-bubble.markdown-body code {
    background: color-mix(in srgb, var(--dc-line) 44%, transparent);
}

.deep-chat-row.user .deep-chat-bubble.markdown-body blockquote {
    border-left-color: color-mix(in srgb, var(--dc-accent) 42%, var(--dc-line));
    color: var(--dc-muted);
}

.deep-chat-row.user .deep-chat-bubble.markdown-body a {
    color: var(--dc-accent);
}

.deep-chat-bubble.is-pending {
    min-height: 34px;
}

.deep-chat-bubble.markdown-body pre {
    margin: 12px 0;
    border-radius: 16px;
    padding: 14px 16px;
    background: color-mix(in srgb, var(--dc-bg-soft) 88%, transparent);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--dc-line) 82%, transparent);
    max-width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    overscroll-behavior-x: contain;
    overscroll-behavior-y: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: auto;
}

[data-theme="dark"] .deep-chat-bubble.markdown-body pre {
    background: color-mix(in srgb, var(--dc-bg-soft) 90%, transparent);
}

.deep-chat-bubble.markdown-body .code-wrap {
    max-width: 100%;
}

.deep-chat-bubble.markdown-body .code-wrap pre {
    overflow-x: auto;
    overflow-y: hidden;
    touch-action: auto;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-wrap {
    border-color: #d8e2ef;
    background: linear-gradient(180deg, #fbfdff 0%, #f3f7fb 100%);
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.08);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-toolbar {
    border-bottom-color: rgba(148, 163, 184, 0.2);
    background: linear-gradient(180deg, #f8fbff 0%, #eef4fa 100%);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-lang {
    color: #475569;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-copy,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-toggle {
    background: rgba(255, 255, 255, 0.92);
    color: #334155;
    border-color: rgba(148, 163, 184, 0.38);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-copy:hover,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-toggle:hover {
    background: #ffffff;
    border-color: rgba(100, 116, 139, 0.42);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-bottom-expand {
    background: rgba(255, 255, 255, 0.96);
    color: #334155;
    border-color: rgba(148, 163, 184, 0.34);
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.12);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-bottom-expand:hover {
    background: #ffffff;
    border-color: rgba(100, 116, 139, 0.42);
    box-shadow: 0 16px 30px rgba(15, 23, 42, 0.15);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-wrap pre,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-wrap pre code,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs {
    color: #0f172a;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-comment,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-quote {
    color: #64748b;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-keyword,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-selector-tag,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-name,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-literal,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-meta-keyword {
    color: #be123c;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-string,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-doctag,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-regexp,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-template-tag,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-template-variable {
    color: #0369a1;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-number,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-symbol,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-bullet,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-link {
    color: #2563eb;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-title,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-section,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-function .hljs-title,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-title.class_ {
    color: #7c3aed;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-type,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-built_in,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-class .hljs-title {
    color: #b45309;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-attr,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-attribute,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-variable,
html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .hljs-property {
    color: #047857;
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-wrap pre::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.45);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-wrap pre::-webkit-scrollbar-track {
    background: rgba(226, 232, 240, 0.72);
}

html:not([data-theme="dark"]) .deep-chat-bubble.markdown-body .code-wrap.is-collapsible:not(.expanded)::after {
    background: linear-gradient(180deg, rgba(243, 247, 251, 0) 0%, rgba(243, 247, 251, 0.94) 72%, rgba(243, 247, 251, 1) 100%);
}

.deep-chat-bubble.markdown-body table {
    margin: 12px 0;
}

.deep-chat-composer {
    width: min(860px, 100%);
    margin: 0 auto;
    border: 1px solid transparent;
    border-radius: 28px;
    padding: 10px 8px 10px 12px;
    background: color-mix(in srgb, var(--dc-bg-soft) 84%, transparent);
    box-shadow: 0 22px 48px rgba(15, 23, 42, 0.1);
    backdrop-filter: blur(14px);
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 8px;
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

[data-theme="dark"] .deep-chat-composer {
    background: color-mix(in srgb, var(--dc-bg-soft) 86%, transparent);
    border-color: rgba(83, 112, 139, 0.56);
    box-shadow:
        0 24px 48px rgba(2, 8, 23, 0.34),
        inset 0 0 0 1px rgba(147, 236, 221, 0.05);
}

[data-theme="dark"] .deep-chat-composer:focus-within {
    border-color: rgba(45, 212, 191, 0.52);
    box-shadow:
        0 0 0 4px rgba(45, 212, 191, 0.12),
        0 24px 48px rgba(2, 8, 23, 0.36),
        inset 0 0 0 1px rgba(147, 236, 221, 0.08);
}

.deep-chat-main.is-empty-view .deep-chat-composer {
    width: min(760px, 100%);
    margin: 0 auto auto;
}

.deep-chat-input {
    border: 0;
    background: transparent;
    padding: 0;
    min-height: 32px;
    max-height: 220px;
    font-size: 14px;
    line-height: 32px;
    display: block;
    width: 100%;
    margin: 0;
}

.deep-chat-input:focus {
    box-shadow: none;
}

.deep-chat-composer-foot {
    margin-top: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.deep-chat-send-btn {
    border: 0;
    border-radius: 999px;
    background: linear-gradient(145deg, #0f172a, #1f2937);
    color: #f8fafc;
    width: 28px;
    height: 28px;
    min-width: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: transform .15s ease, filter .2s ease, opacity .2s ease;
}

.deep-chat-send-btn:hover {
    transform: translateY(-1px);
    filter: saturate(1.04);
}

.deep-chat-send-btn:disabled,
.deep-chat-send-btn.is-disabled,
.deep-chat-send-btn[aria-disabled="true"] {
    opacity: .92;
    cursor: default;
    transform: none;
}

.deep-chat-send-btn .send-icon {
    width: 13px;
    height: 13px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: opacity .18s ease, transform .18s ease;
}

.deep-chat-send-btn .send-spinner {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 13px;
    height: 13px;
    border-radius: 999px;
    border: 2px solid rgba(255, 255, 255, 0.28);
    border-top-color: currentColor;
    opacity: 0;
    transform: scale(.8);
    pointer-events: none;
    transition: opacity .18s ease, transform .18s ease;
    animation: deep-chat-send-spin .78s linear infinite;
    animation-play-state: paused;
}

.deep-chat-send-btn.is-loading .send-icon {
    opacity: 0;
    transform: scale(.82);
}

.deep-chat-send-btn.is-loading .send-spinner {
    opacity: 1;
    transform: scale(1);
    animation-play-state: running;
}

[data-theme="dark"] .deep-chat-send-btn {
    background: linear-gradient(145deg, rgba(45, 212, 191, 0.18), rgba(45, 212, 191, 0.3));
    color: #d9fffb;
}

@keyframes deep-chat-pulse {
    0%, 80%, 100% {
        transform: scale(.8);
        opacity: .45;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes deep-chat-send-spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 980px) {
    body.deep-chat-body {
        position: fixed;
        inset: 0;
        width: 100%;
        overflow: hidden;
    }

    .deep-chat-page {
        position: fixed;
        inset: 0;
        width: 100%;
        margin: 0;
        min-height: var(--dc-app-height, 100vh);
        height: var(--dc-app-height, 100vh);
        max-height: var(--dc-app-height, 100vh);
        padding: max(10px, env(safe-area-inset-top, 0px)) 0 max(12px, env(safe-area-inset-bottom, 0px));
        overflow: hidden;
    }

    .deep-chat-page .global-topbar {
        width: min(100%, 94%);
        margin: 0 auto;
        padding: 0;
    }

    .deep-chat-shell {
        width: 100vw;
        margin-left: calc(50% - 50vw);
        grid-template-columns: 1fr;
        gap: 0;
        flex: 1;
        min-height: 0;
        height: 100%;
    }

    .deep-chat-sidebar {
        position: absolute;
        z-index: 22;
        inset: 0 auto 0 0;
        width: clamp(220px, 52vw, 320px);
        max-width: calc(100vw - 52px);
        padding: 14px 12px 12px;
        border-right: 0;
        border-radius: 0 24px 24px 0;
        background: color-mix(in srgb, var(--dc-bg-elevated) 96%, transparent);
        box-shadow: 0 24px 48px rgba(15, 23, 42, 0.16);
        backdrop-filter: blur(18px);
        transform: translateX(calc(-100% - 16px));
        transition: transform .24s ease, box-shadow .24s ease;
    }

    .deep-chat-sidebar-collapse,
    .deep-chat-sidebar-dock {
        display: none;
    }

    .deep-chat-shell.sidebar-open .deep-chat-sidebar {
        transform: translateX(0);
    }

    .deep-chat-sidebar-overlay {
        position: absolute;
        inset: 0;
        z-index: 20;
        display: block;
        opacity: 0;
        pointer-events: none;
        background: linear-gradient(90deg, rgba(2, 6, 23, 0.12), rgba(2, 6, 23, 0.42));
        backdrop-filter: blur(2px);
        transition: opacity .24s ease;
    }

    .deep-chat-shell.sidebar-open .deep-chat-sidebar-overlay {
        opacity: 1;
        pointer-events: auto;
    }

    .deep-chat-sidebar-toggle {
        display: inline-flex;
    }

    .deep-chat-main {
        grid-column: 1;
        min-height: 0;
        height: 100%;
        padding: 0;
        overflow: hidden;
        position: relative;
    }

    .deep-chat-main-head {
        padding: 8px 14px 12px;
    }

    .deep-chat-head-tools {
        flex: 1;
    }

    .deep-chat-model-picker {
        margin-left: auto;
        max-width: min(46vw, 156px);
    }

    .deep-chat-model-label {
        display: none;
    }

    .deep-chat-model-select {
        min-width: 0;
        width: min(100%, 132px);
        font-size: 11px;
    }

    .deep-chat-feed {
        padding: 8px 14px 18px;
        padding-bottom: calc(18px + var(--dc-keyboard-offset, 0px));
        scroll-padding-bottom: calc(120px + var(--dc-keyboard-offset, 0px));
        -webkit-overflow-scrolling: touch;
    }

    .deep-chat-scroll-bottom {
        right: 12px;
        bottom: calc(92px + env(safe-area-inset-bottom, 0px) + var(--dc-keyboard-offset, 0px));
    }

    .deep-chat-composer {
        width: min(860px, calc(100% - 24px));
        margin: auto auto 0;
        margin-bottom: var(--dc-keyboard-offset, 0px);
        border-radius: 28px;
        padding: 10px 14px calc(10px + env(safe-area-inset-bottom, 0px));
        background: color-mix(in srgb, var(--dc-bg-soft) 90%, transparent);
        box-shadow: 0 18px 36px rgba(15, 23, 42, 0.1);
        position: sticky;
        bottom: 0;
        z-index: 6;
        transition: margin-bottom .22s ease, width .22s ease, border-radius .22s ease;
        cursor: text;
    }

    .deep-chat-main.is-empty-view .deep-chat-composer {
        width: min(860px, calc(100% - 24px));
        margin: 0 auto auto;
        margin-bottom: var(--dc-keyboard-offset, 0px);
    }

    body.deep-chat-body.deep-chat-mobile-keyboard .deep-chat-page .global-topbar {
        display: none;
    }

    body.deep-chat-body.deep-chat-mobile-keyboard .deep-chat-main-head {
        padding-top: 4px;
        padding-bottom: 8px;
    }

    body.deep-chat-body.deep-chat-mobile-keyboard .deep-chat-feed {
        padding-top: 4px;
    }

    body.deep-chat-body.deep-chat-mobile-keyboard .deep-chat-composer {
        width: min(100%, calc(100% - 12px));
        border-radius: 22px;
    }

    body.deep-chat-body.deep-chat-sheet-open .deep-chat-composer,
    body.deep-chat-body.deep-chat-sheet-open .deep-chat-scroll-bottom {
        opacity: 0;
        pointer-events: none;
    }

    .deep-chat-composer-foot {
        display: none;
    }

    .deep-chat-input.is-mobile-trigger {
        height: 46px !important;
        min-height: 46px;
        max-height: 46px;
        padding: 11px 0;
        border: 0;
        background: transparent;
        box-shadow: none;
        font-size: 16px;
        line-height: 24px;
        cursor: text;
        overflow: hidden;
        resize: none;
        user-select: none;
        -webkit-user-select: none;
    }

    .deep-chat-input.is-mobile-trigger::placeholder {
        color: color-mix(in srgb, var(--dc-muted) 92%, transparent);
    }

    .deep-chat-mobile-composer {
        position: fixed;
        inset: 0;
        z-index: 80;
        display: flex !important;
        align-items: flex-end;
        justify-content: stretch;
        opacity: 0;
        pointer-events: none;
        transition: opacity .2s ease;
    }

    .deep-chat-mobile-composer.is-open {
        opacity: 1;
        pointer-events: auto;
    }

    .deep-chat-mobile-composer-backdrop {
        position: absolute;
        inset: 0;
        border: 0;
        padding: 0;
        background: rgba(15, 23, 42, 0.34);
        backdrop-filter: blur(8px);
    }

    .deep-chat-mobile-panel {
        position: relative;
        width: 100%;
        margin-top: auto;
        border-radius: 26px 26px 0 0;
        background: color-mix(in srgb, var(--dc-bg-soft) 96%, transparent);
        box-shadow: 0 -24px 48px rgba(15, 23, 42, 0.18);
        padding: 52px 14px calc(14px + env(safe-area-inset-bottom, 0px) + var(--dc-keyboard-offset, 0px));
        transform: translateY(100%);
        transition: transform .24s ease;
    }

    [data-theme="dark"] .deep-chat-mobile-panel {
        background: color-mix(in srgb, var(--dc-bg-soft) 94%, transparent);
        box-shadow: 0 -24px 48px rgba(2, 8, 23, 0.4);
    }

    .deep-chat-mobile-composer.is-open .deep-chat-mobile-panel {
        transform: translateY(0);
    }

    .deep-chat-mobile-close {
        position: absolute;
        top: 12px;
        right: 12px;
        width: 38px;
        height: 38px;
        flex: 0 0 38px;
        border: 1px solid color-mix(in srgb, var(--dc-line) 82%, transparent);
        border-radius: 14px;
        background: color-mix(in srgb, var(--dc-bg-soft) 84%, transparent);
        color: var(--dc-text);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
    }

    .deep-chat-mobile-close svg {
        width: 18px;
        height: 18px;
        stroke: currentColor;
        fill: none;
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round;
    }

.deep-chat-mobile-body {
    border: 1px solid color-mix(in srgb, var(--dc-line) 88%, transparent);
    border-radius: 22px;
    background: color-mix(in srgb, var(--dc-bg-elevated) 96%, transparent);
    padding: 12px 13px;
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--dc-line) 22%, transparent);
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

    .deep-chat-mobile-input {
        width: 100%;
        min-height: 132px;
        max-height: min(38vh, 320px);
        border: 0;
        background: transparent;
        color: var(--dc-text);
        resize: none;
        padding: 0;
        margin: 0;
        outline: none;
        font-size: 16px;
        line-height: 1.6;
        display: block;
    }

.deep-chat-mobile-input::placeholder {
    color: color-mix(in srgb, var(--dc-muted) 92%, transparent);
}

[data-theme="dark"] .deep-chat-mobile-body {
    border-color: rgba(83, 112, 139, 0.6);
    box-shadow:
        inset 0 0 0 1px rgba(147, 236, 221, 0.05),
        0 14px 28px rgba(2, 8, 23, 0.2);
}

[data-theme="dark"] .deep-chat-mobile-body:focus-within {
    border-color: rgba(45, 212, 191, 0.52);
    box-shadow:
        0 0 0 4px rgba(45, 212, 191, 0.12),
        inset 0 0 0 1px rgba(147, 236, 221, 0.08),
        0 14px 28px rgba(2, 8, 23, 0.24);
}

    .deep-chat-mobile-foot {
        margin-top: 12px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
    }

    .deep-chat-mobile-meta {
        color: var(--dc-muted);
        font-size: 12px;
    }

    .deep-chat-mobile-send-btn {
        width: 42px;
        height: 42px;
        min-width: 42px;
    }

    .deep-chat-mobile-send-btn .send-icon,
    .deep-chat-mobile-send-btn .send-spinner {
        width: 16px;
        height: 16px;
    }
}

@media (max-width: 820px) {
    .deep-chat-page {
        padding-top: max(8px, env(safe-area-inset-top, 0px));
    }

    .deep-chat-main-head {
        padding: 6px 12px 10px;
    }

    .deep-chat-model-picker {
        max-width: min(46vw, 144px);
        padding-left: 7px;
    }

    .deep-chat-model-select {
        width: 100%;
        height: 26px;
        font-size: 10px;
    }

    .deep-chat-sidebar {
        width: min(56vw, 300px);
        max-width: calc(100vw - 56px);
    }

    .deep-chat-sidebar-head {
        padding-bottom: 10px;
    }

    .deep-chat-sidebar-head h1 {
        font-size: 20px;
    }

    .deep-chat-sidebar-search-wrap {
        padding-bottom: 10px;
    }

    .deep-chat-empty-title-row {
        gap: 10px;
        align-items: center;
    }

    .deep-chat-empty-badge {
        width: 46px;
        height: 46px;
        border-radius: 16px;
        flex: 0 0 46px;
    }

    .deep-chat-empty h3 {
        font-size: clamp(22px, 5.4vw, 28px);
        line-height: 1.16;
        text-align: left;
    }

    .deep-chat-main-title-wrap h2 {
        font-size: 15px;
    }

    .deep-chat-feed {
        padding: 8px 12px 16px;
        padding-bottom: calc(16px + var(--dc-keyboard-offset, 0px));
        scroll-behavior: auto;
    }

    .deep-chat-scroll-bottom {
        right: 10px;
        bottom: calc(86px + env(safe-area-inset-bottom, 0px) + var(--dc-keyboard-offset, 0px));
    }

    .deep-chat-composer {
        width: min(100%, calc(100% - 20px));
        border-radius: 24px;
        padding: 10px 12px calc(10px + env(safe-area-inset-bottom, 0px));
    }

    .deep-chat-main.is-empty-view .deep-chat-composer {
        width: min(100%, calc(100% - 20px));
        margin: 0 auto auto;
        margin-bottom: var(--dc-keyboard-offset, 0px);
    }

    .deep-chat-input {
        min-height: 32px;
        line-height: 32px;
    }

    .deep-chat-mobile-panel {
        border-radius: 24px 24px 0 0;
        padding: 48px 12px calc(12px + env(safe-area-inset-bottom, 0px) + var(--dc-keyboard-offset, 0px));
    }

    .deep-chat-mobile-body {
        padding: 11px 12px;
        border-radius: 20px;
    }

    .deep-chat-mobile-input {
        min-height: 120px;
        max-height: min(36vh, 280px);
    }

    .deep-chat-bubble.markdown-body .code-toolbar {
        height: 30px;
        padding: 0 7px;
        gap: 6px;
    }

    .deep-chat-bubble.markdown-body .code-wrap {
        margin: 8px 0;
        border-radius: 12px;
    }

    .deep-chat-bubble.markdown-body .code-toolbar-left,
    .deep-chat-bubble.markdown-body .code-actions {
        gap: 6px;
    }

    .deep-chat-bubble.markdown-body .code-lang,
    .deep-chat-bubble.markdown-body .code-copy,
    .deep-chat-bubble.markdown-body .code-toggle,
    .deep-chat-bubble.markdown-body .code-bottom-expand {
        font-size: 10px;
    }

    .deep-chat-bubble.markdown-body .code-copy,
    .deep-chat-bubble.markdown-body .code-toggle {
        padding: 3px 7px;
        border-radius: 7px;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre {
        padding: 8px 9px;
        font-size: 11.5px;
        line-height: 1.54;
        overflow-x: hidden;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible pre {
        max-height: 240px;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible:not(.expanded) pre {
        padding-bottom: 56px;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible:not(.expanded)::after {
        height: 50px;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre code,
    .deep-chat-bubble.markdown-body .code-wrap pre .hljs {
        font-size: inherit;
        line-height: inherit;
        white-space: pre-wrap;
        word-break: break-word;
        overflow-wrap: anywhere;
        min-width: 0;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre code *,
    .deep-chat-bubble.markdown-body .code-wrap pre .hljs * {
        font-size: inherit;
        line-height: inherit;
        white-space: inherit;
    }

    .deep-chat-row,
    .deep-chat-row.user {
        margin-bottom: 22px;
        max-width: 100%;
        padding-right: 16px;
        padding-left: 0;
    }

    .deep-chat-msg-main,
    .deep-chat-row.user .deep-chat-msg-main {
        width: 100%;
        max-width: 100%;
    }

    .deep-chat-row.user {
        padding-left: 16px;
        padding-right: 16px;
    }

    .deep-chat-stop-btn {
        padding: 0 10px;
        font-size: 12px;
    }
}

@media (max-width: 640px) {
    .deep-chat-mobile-panel {
        border-radius: 22px 22px 0 0;
        padding: 46px 10px calc(11px + env(safe-area-inset-bottom, 0px) + var(--dc-keyboard-offset, 0px));
    }

    .deep-chat-mobile-close {
        top: 10px;
        right: 10px;
        width: 36px;
        height: 36px;
        flex-basis: 36px;
        border-radius: 12px;
    }

    .deep-chat-mobile-body {
        padding: 10px 11px;
        border-radius: 18px;
    }

    .deep-chat-mobile-input {
        min-height: 108px;
    }

    .deep-chat-mobile-meta {
        font-size: 11px;
    }

    .deep-chat-mobile-send-btn {
        width: 40px;
        height: 40px;
        min-width: 40px;
    }

    .deep-chat-bubble.markdown-body .code-toolbar {
        height: 28px;
        padding: 0 6px;
    }

    .deep-chat-bubble.markdown-body .code-wrap {
        margin: 7px 0;
        border-radius: 11px;
    }

    .deep-chat-bubble.markdown-body .code-lang,
    .deep-chat-bubble.markdown-body .code-copy,
    .deep-chat-bubble.markdown-body .code-toggle,
    .deep-chat-bubble.markdown-body .code-bottom-expand {
        font-size: 9px;
    }

    .deep-chat-bubble.markdown-body .code-copy,
    .deep-chat-bubble.markdown-body .code-toggle {
        padding: 2px 6px;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre {
        padding: 7px 8px;
        font-size: 11px;
        line-height: 1.5;
        overflow-x: hidden;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible pre {
        max-height: 220px;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible:not(.expanded) pre {
        padding-bottom: 52px;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible:not(.expanded)::after {
        height: 46px;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre code,
    .deep-chat-bubble.markdown-body .code-wrap pre .hljs {
        font-size: inherit;
        line-height: inherit;
        white-space: pre-wrap;
        word-break: break-word;
        overflow-wrap: anywhere;
        min-width: 0;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre code *,
    .deep-chat-bubble.markdown-body .code-wrap pre .hljs * {
        font-size: inherit;
        line-height: inherit;
        white-space: inherit;
    }

    .deep-chat-sidebar {
        width: min(58vw, 280px);
        max-width: calc(100vw - 60px);
    }
}

@media (max-width: 420px) {
    .deep-chat-bubble {
        padding: 10px 11px;
    }

    .deep-chat-bubble.markdown-body .code-toolbar {
        height: 26px;
        padding: 0 5px;
        gap: 5px;
    }

    .deep-chat-bubble.markdown-body .code-lang,
    .deep-chat-bubble.markdown-body .code-copy,
    .deep-chat-bubble.markdown-body .code-toggle,
    .deep-chat-bubble.markdown-body .code-bottom-expand {
        font-size: 8.5px;
    }

    .deep-chat-bubble.markdown-body .code-copy,
    .deep-chat-bubble.markdown-body .code-toggle {
        padding: 2px 5px;
        border-radius: 6px;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre {
        padding: 6px 7px;
        font-size: 10.5px;
        line-height: 1.46;
        overflow-x: hidden;
    }

    .deep-chat-bubble.markdown-body .code-wrap.is-collapsible pre {
        max-height: 200px;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre code,
    .deep-chat-bubble.markdown-body .code-wrap pre .hljs {
        white-space: pre-wrap;
        word-break: break-word;
        overflow-wrap: anywhere;
        min-width: 0;
    }

    .deep-chat-bubble.markdown-body .code-wrap pre code *,
    .deep-chat-bubble.markdown-body .code-wrap pre .hljs * {
        white-space: inherit;
    }
}