/* Telegram-inspired refinement layer */
body.chat-page {
    --chat-bg: var(--bg-body);
    --chat-surface: var(--surface);
    --chat-surface-strong: var(--surface-solid);
    --chat-border: var(--border-color);
    --chat-text: var(--text-primary);
    --chat-muted: var(--text-secondary);
    --chat-accent: var(--accent-color);
    --chat-accent-soft: var(--accent-soft);
    --chat-bubble: var(--surface-solid);
    --chat-bubble-me: linear-gradient(180deg, rgba(43, 109, 243, 0.13) 0%, rgba(43, 109, 243, 0.07) 100%);
    --chat-shell-gradient: linear-gradient(180deg, var(--bg-body-strong) 0%, var(--bg-body) 100%);
    --chat-header-bg: var(--surface);
    --chat-pane-bg: var(--surface);
    --chat-pane-bg-strong: var(--surface-solid);
    --chat-control-bg: var(--surface);
    --chat-control-bg-hover: var(--surface-solid);
    --chat-stream-bg: var(--surface-muted);
    --chat-stream-pattern: rgba(127, 145, 165, 0.08);
    --chat-composer-bg: var(--surface);
    --chat-input-bg: var(--surface-solid);
    --chat-overlay-bg: var(--overlay-backdrop);
    --chat-sheet-bg: var(--surface-solid);
    --chat-modal-bg: var(--surface-solid);
    --chat-chip-bg: var(--surface-contrast);
    --chat-toast-bg: rgba(17, 30, 54, 0.92);
}

html[data-theme="dark"] body.chat-page {
    --chat-bubble-me: linear-gradient(180deg, rgba(114, 169, 255, 0.26) 0%, rgba(114, 169, 255, 0.16) 100%);
    --chat-shell-gradient: linear-gradient(180deg, var(--bg-body-strong) 0%, var(--bg-body) 100%);
    --chat-stream-pattern: rgba(124, 145, 168, 0.16);
}

.chat-app {
    width: min(1540px, 100%);
    padding: calc(0.2rem + env(safe-area-inset-top, 0px)) 0.2rem calc(0.2rem + var(--chat-shell-offset));
    gap: 0.2rem;
}

.chat-app__header,
.chat-login-panel,
.chat-stage,
.conversation-pane,
.thread-pane,
.chat-info-sheet,
.chat-modal,
.chat-context-menu,
.chat-list-context-menu {
    border-radius: 14px;
}

.chat-app__header {
    position: sticky;
    top: 0;
    z-index: 18;
    padding: 0.34rem 0.46rem;
    box-shadow: var(--surface-shadow);
    backdrop-filter: blur(10px);
}

.chat-app__identity h1 {
    font-size: 0.92rem;
    line-height: 1.28;
}

.chat-app__identity p {
    font-size: 0.69rem;
    line-height: 1.42;
}

.chat-login-panel,
.chat-stage,
.conversation-pane,
.thread-pane {
    box-shadow: none;
    backdrop-filter: none;
}

.chat-stage {
    padding: 0.22rem;
    gap: 0.22rem;
    grid-template-columns: minmax(302px, 356px) minmax(0, 1fr);
    background: var(--chat-surface);
}

.conversation-pane {
    background: var(--chat-pane-bg);
}

.thread-pane {
    background: var(--chat-pane-bg-strong);
}

.conversation-pane__header {
    padding: 0.42rem 0.5rem 0.28rem;
}

.conversation-search-wrap {
    padding: 0 0.5rem 0.34rem;
}

.conversation-search-wrap input,
.chat-modal__fields input,
.chat-modal__fields textarea,
#edit-text,
.composer-entry textarea {
    border-radius: 11px;
}

.conversation-list {
    padding: 0 0.2rem 0.3rem;
    gap: 0.06rem;
    scrollbar-gutter: stable both-edges;
}

.conversation-item__main {
    min-height: 54px;
    padding: 0.28rem 0.42rem;
    border-radius: 12px;
}

.conversation-item__avatar {
    width: 40px;
    height: 40px;
}

.thread-head {
    position: sticky;
    top: 0;
    z-index: 5;
    padding: 0.32rem 0.48rem;
    background: var(--chat-header-bg);
    border-bottom: 1px solid var(--chat-border);
    backdrop-filter: blur(8px);
}

.thread-head__copy strong {
    font-size: 0.86rem;
}

.thread-head__copy span {
    font-size: 0.68rem;
}

.thread-banner-stack {
    padding: 0.2rem 0.3rem 0;
}

.thread-stream {
    background:
        linear-gradient(var(--chat-stream-bg), var(--chat-stream-bg)),
        radial-gradient(circle at 1px 1px, var(--chat-stream-pattern) 1px, transparent 0);
    background-size: auto, 28px 28px;
}

.stream-state {
    background:
        linear-gradient(var(--chat-stream-bg), var(--chat-stream-bg)),
        radial-gradient(circle at 1px 1px, var(--chat-stream-pattern) 1px, transparent 0);
    background-size: auto, 28px 28px;
}

.stream-state::before {
    content: "";
    width: 34px;
    height: 34px;
    border-radius: 50%;
    margin: 0 auto 0.2rem;
    border: 2px solid rgba(127, 145, 165, 0.3);
    border-top-color: var(--chat-accent);
    animation: chat-stream-spin 1s linear infinite;
}

.stream-state[data-kind="empty"]::before {
    border-style: dashed;
    border-top-color: rgba(127, 145, 165, 0.3);
    animation: none;
}

.stream-state[data-kind="error"]::before {
    border-color: rgba(199, 83, 94, 0.26);
    border-top-color: var(--chat-danger);
}

.stream-state[data-kind="reconnect"]::before {
    border-color: rgba(194, 129, 29, 0.24);
    border-top-color: var(--chat-warning);
}

.stream-state[data-kind="error"] strong {
    color: var(--chat-danger);
}

.stream-state[data-kind="reconnect"] strong {
    color: var(--chat-warning);
}

.messages {
    padding: 0.46rem 0.52rem 0.36rem;
    background:
        linear-gradient(var(--chat-stream-bg), var(--chat-stream-bg)),
        radial-gradient(circle at 1px 1px, var(--chat-stream-pattern) 1px, transparent 0);
    background-size: auto, 28px 28px;
    scroll-behavior: auto;
    scrollbar-gutter: stable both-edges;
}

@media (min-width: 981px) {
    .messages {
        padding-inline: clamp(1.1rem, 5.6vw, 4.9rem);
    }
}

.msg-item {
    margin-bottom: 0.1rem;
}

.msg-item.day-start {
    position: relative;
    margin-top: 0.72rem;
    padding-top: 0.94rem;
}

.msg-item.day-start::before {
    content: attr(data-day-label);
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    min-height: 22px;
    padding: 0.1rem 0.54rem;
    border-radius: 999px;
    border: 1px solid var(--chat-border);
    background: var(--chat-chip-bg);
    color: var(--chat-muted);
    font-size: 0.66rem;
    font-weight: 760;
    white-space: nowrap;
}

.msg-row {
    gap: 0.26rem;
}

.msg-avatar {
    width: 32px;
    height: 32px;
}

.msg-item.me .msg-avatar {
    display: none;
}

.msg-item.grouped-with-prev .msg-avatar {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: none;
}

.msg-bubble {
    max-width: min(72%, 640px);
    padding: 0.34rem 0.54rem 0.28rem;
    border-radius: 16px;
    box-shadow: none;
}

.msg-item.other.group-single .msg-bubble,
.msg-item.other.group-end .msg-bubble {
    border-bottom-left-radius: 8px;
}

.msg-item.other.group-start .msg-bubble,
.msg-item.other.group-middle .msg-bubble {
    border-top-left-radius: 10px;
    border-bottom-left-radius: 12px;
}

.msg-item.me.group-single .msg-bubble,
.msg-item.me.group-end .msg-bubble {
    border-bottom-right-radius: 8px;
}

.msg-item.me.group-start .msg-bubble,
.msg-item.me.group-middle .msg-bubble {
    border-top-right-radius: 10px;
    border-bottom-right-radius: 12px;
}

.msg-item:hover .msg-bubble,
.msg-item.is-menu-open .msg-bubble {
    box-shadow: 0 10px 26px -24px rgba(17, 30, 54, 0.26);
}

.msg-head {
    margin-bottom: 0.12rem;
}

.msg-name {
    font-size: 0.69rem;
}

.msg-text {
    font-size: 0.81rem;
    line-height: 1.66;
}

.msg-foot {
    margin-top: 0.14rem;
}

.msg-reactions {
    margin-top: 0.2rem;
    gap: 0.22rem;
}

.msg-reaction {
    min-height: 22px;
    padding: 0.08rem 0.34rem;
    border-radius: 999px;
}

.composer {
    position: sticky;
    bottom: 0;
    z-index: 5;
    padding: 0.32rem 0.38rem calc(0.4rem + env(safe-area-inset-bottom, 0px));
    background: var(--chat-composer-bg);
    border-top: 1px solid var(--chat-border);
    backdrop-filter: blur(8px);
}

.composer-box {
    border-radius: 18px;
    padding: 0.18rem;
    gap: 0.28rem;
}

.composer-entry textarea {
    min-height: 40px;
    max-height: 168px;
    padding: 0.38rem 0.52rem;
    line-height: 1.66;
    font-size: 0.81rem;
}

.composer-tool,
.composer-send {
    width: 36px;
    height: 36px;
    border-radius: 11px;
}

.composer-status {
    min-height: 0.9rem;
}

.chat-mobile-nav {
    background: var(--chat-pane-bg-strong);
}

.chat-info-sheet {
    width: min(368px, 100vw);
}

.chat-modal {
    width: min(500px, calc(100vw - 1rem));
}

@keyframes chat-stream-spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 1240px) {
    .chat-stage {
        grid-template-columns: minmax(286px, 326px) minmax(0, 1fr);
    }

    .msg-bubble {
        max-width: min(76%, 640px);
    }
}

@media (max-width: 980px) {
    .chat-stage {
        grid-template-columns: 1fr;
        padding: 0;
        border-radius: 0;
        background: transparent;
    }

    .conversation-pane,
    .thread-pane {
        border-radius: 0;
        box-shadow: none;
    }

    .conversation-pane {
        background: var(--chat-pane-bg-strong);
    }

    .thread-head {
        padding-inline: 0.46rem;
    }

    .messages {
        padding: 0.46rem 0.48rem 0.34rem;
    }

    .msg-item.day-start {
        margin-top: 0.58rem;
        padding-top: 0.84rem;
    }

    .msg-item.day-start::before {
        font-size: 0.64rem;
    }

    .msg-bubble {
        max-width: 88%;
        padding: 0.4rem 0.54rem 0.34rem;
    }

    .composer {
        padding: 0.38rem 0.38rem calc(0.44rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height));
    }

    .composer-box {
        border-radius: 15px;
    }
}

@media (max-width: 680px) {
    .messages {
        padding: 0.42rem 0.4rem 0.3rem;
    }

    .msg-bubble {
        max-width: 91%;
    }
}

/* Telegram mobile fidelity layer */
body.chat-page {
    --chat-top-chrome-color: var(--surface-solid);
    --chat-statusbar-color: var(--surface-solid);
    background-color: var(--chat-statusbar-color);
}

html[data-theme="dark"] body.chat-page {
    --chat-top-chrome-color: #131b25;
    --chat-statusbar-color: #131b25;
}

.conversation-filter-tabs {
    display: flex;
    align-items: center;
    gap: 0.24rem;
    overflow-x: auto;
    padding: 0 0.5rem 0.36rem;
    scrollbar-width: none;
}

.conversation-filter-tabs::-webkit-scrollbar {
    height: 0;
}

.conversation-filter-tab {
    min-height: 30px;
    padding: 0.2rem 0.74rem;
    border-radius: 999px;
    border: 1px solid var(--chat-border);
    background: var(--chat-control-bg);
    color: var(--chat-muted);
    font-size: 0.68rem;
    font-weight: 830;
    white-space: nowrap;
    transition: color var(--motion-fast, 0.18s) ease, border-color var(--motion-fast, 0.18s) ease, background var(--motion-fast, 0.18s) ease, transform var(--motion-fast, 0.18s) ease;
}

.conversation-filter-tab:hover,
.conversation-filter-tab:focus-visible {
    border-color: color-mix(in srgb, var(--chat-accent) 34%, var(--chat-border));
    color: var(--chat-text);
    background: var(--chat-control-bg-hover);
}

.conversation-filter-tab.is-active {
    border-color: color-mix(in srgb, var(--chat-accent) 42%, var(--chat-border));
    color: var(--chat-accent);
    background: color-mix(in srgb, var(--chat-accent) 14%, transparent);
}

@media (max-width: 980px) {
    body.chat-page.chat-mobile-nav-visible {
        --chat-local-nav-height: calc(84px + env(safe-area-inset-bottom, 0px));
    }

    .conversation-pane,
    .thread-pane {
        background: var(--chat-pane-bg-strong);
    }

    .conversation-pane__header,
    .thread-head {
        background: var(--chat-top-chrome-color);
    }

    .conversation-pane__header {
        position: sticky;
        top: 0;
        z-index: 12;
        padding: calc(0.42rem + env(safe-area-inset-top, 0px)) 0.64rem 0.34rem;
        border-bottom: 1px solid var(--chat-border);
    }

    .conversation-pane__header h2 {
        font-size: 1.18rem;
        line-height: 1.26;
        letter-spacing: -0.02em;
    }

    .conversation-pane__header p {
        font-size: 0.72rem;
        line-height: 1.52;
    }

    .conversation-pane__header-actions {
        gap: 0.22rem;
        padding: 0.16rem;
        border-radius: 999px;
        border: 1px solid var(--chat-border);
        background: color-mix(in srgb, var(--chat-control-bg) 90%, transparent);
    }

    .conversation-pane__icon-btn {
        width: 34px;
        height: 34px;
        border-radius: 999px;
        border-color: transparent;
    }

    .conversation-search-wrap {
        padding: 0.34rem 0.64rem 0.3rem;
        background: var(--chat-top-chrome-color);
    }

    .conversation-search-wrap input {
        min-height: 42px;
        padding-inline: 0.92rem;
        border-radius: 14px;
        border-color: color-mix(in srgb, var(--chat-border) 85%, transparent);
        background: color-mix(in srgb, var(--chat-input-bg) 94%, transparent);
        font-size: 0.84rem;
    }

    .conversation-filter-tabs {
        padding: 0 0.64rem 0.36rem;
        background: var(--chat-top-chrome-color);
        border-bottom: 1px solid var(--chat-border);
    }

    .conversation-filter-tab {
        min-height: 34px;
        padding-inline: 0.88rem;
        font-size: 0.73rem;
    }

    .conversation-list {
        padding: 0 0.56rem calc(0.7rem + var(--chat-local-nav-height));
        gap: 0;
    }

    .conversation-item {
        gap: 0;
    }

    .conversation-item__main {
        min-height: 62px;
        border-radius: 0;
        border: 0;
        border-bottom: 1px solid color-mix(in srgb, var(--chat-border) 75%, transparent);
        padding: 0.36rem 0.12rem;
    }

    .conversation-item__main::before {
        display: none;
    }

    .conversation-item.is-active .conversation-item__main {
        background: color-mix(in srgb, var(--chat-accent) 10%, transparent);
        border-color: color-mix(in srgb, var(--chat-accent) 24%, var(--chat-border));
    }

    .conversation-item__avatar {
        width: 52px;
        height: 52px;
        font-size: 0.9rem;
    }

    .conversation-item__title {
        font-size: 0.96rem;
        line-height: 1.28;
        font-weight: 880;
    }

    .conversation-item__subtitle {
        margin-top: 0.02rem;
        font-size: 0.7rem;
    }

    .conversation-item__preview {
        margin-top: 0.03rem;
        font-size: 0.78rem;
        line-height: 1.38;
    }

    .conversation-item__meta {
        align-self: stretch;
        display: grid;
        justify-items: end;
        align-content: space-between;
    }

    .conversation-item__time {
        font-size: 0.76rem;
    }

    .conversation-item__unread {
        min-width: 22px;
        height: 22px;
        border-radius: 999px;
        font-size: 0.68rem;
        font-weight: 860;
    }

    .conversation-item__tools {
        align-self: center;
        gap: 0.08rem;
    }

    .thread-head {
        position: sticky;
        top: 0;
        z-index: 14;
        padding: calc(0.34rem + env(safe-area-inset-top, 0px)) 0.52rem 0.36rem;
        border-bottom: 1px solid var(--chat-border);
    }

    .thread-head__identity {
        padding: 0.2rem 0.46rem 0.2rem 0.24rem;
        border-radius: 999px;
        border: 1px solid color-mix(in srgb, var(--chat-border) 85%, transparent);
        background: color-mix(in srgb, var(--chat-control-bg) 82%, transparent);
        min-height: 48px;
    }

    .thread-head__avatar {
        width: 36px;
        height: 36px;
        border-radius: 50%;
    }

    .thread-head__copy strong {
        font-size: 0.97rem;
        line-height: 1.2;
    }

    .thread-head__copy span {
        margin-top: 0.05rem;
        font-size: 0.74rem;
        line-height: 1.38;
    }

    .thread-head__actions .chat-top-btn,
    .thread-head__mobile-btn {
        width: 38px;
        height: 38px;
        border-radius: 999px;
        background: color-mix(in srgb, var(--chat-control-bg) 88%, transparent);
    }

    .thread-banner-stack {
        padding: 0.28rem 0.42rem 0;
    }

    .chat-pinned-strip {
        min-height: 44px;
        border-radius: 16px;
        background: color-mix(in srgb, var(--chat-control-bg) 90%, transparent);
        border-color: color-mix(in srgb, var(--chat-border) 90%, transparent);
    }

    .chat-pinned-strip__copy strong {
        font-size: 0.74rem;
        line-height: 1.24;
    }

    .chat-pinned-strip__copy span {
        font-size: 0.72rem;
        line-height: 1.3;
    }

    .messages {
        padding: 0.46rem 0.5rem 0.34rem;
        background:
            linear-gradient(var(--chat-stream-bg), var(--chat-stream-bg)),
            radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--chat-stream-pattern) 88%, transparent) 1px, transparent 0);
        background-size: auto, 24px 24px;
    }

    .msg-item {
        margin-bottom: 0.16rem;
    }

    .msg-item.day-start {
        margin-top: 0.66rem;
        padding-top: 0.86rem;
    }

    .msg-item.day-start::before {
        min-height: 24px;
        padding: 0.14rem 0.64rem;
        border-radius: 999px;
        font-size: 0.68rem;
        background: color-mix(in srgb, var(--chat-chip-bg) 94%, transparent);
    }

    .msg-row {
        gap: 0.34rem;
    }

    .msg-avatar {
        width: 34px;
        height: 34px;
    }

    .msg-bubble {
        max-width: min(86%, 700px);
        border-radius: 18px;
        padding: 0.46rem 0.62rem 0.38rem;
    }

    .msg-text {
        font-size: 0.92rem;
        line-height: 1.62;
    }

    .msg-foot {
        margin-top: 0.18rem;
    }

    .composer {
        position: sticky;
        bottom: 0;
        z-index: 15;
        padding: 0.38rem 0.42rem calc(0.5rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height));
        background: color-mix(in srgb, var(--chat-composer-bg) 92%, transparent);
        border-top: 1px solid color-mix(in srgb, var(--chat-border) 88%, transparent);
        backdrop-filter: blur(16px);
    }

    .composer-box {
        border-radius: 20px;
        border-color: color-mix(in srgb, var(--chat-border) 86%, transparent);
        background: color-mix(in srgb, var(--chat-control-bg) 94%, transparent);
        padding: 0.2rem;
        gap: 0.24rem;
    }

    .composer-entry textarea {
        min-height: 42px;
        max-height: 184px;
        padding: 0.46rem 0.58rem;
        font-size: 0.9rem;
        line-height: 1.58;
        border-radius: 14px;
    }

    .composer-tool,
    .composer-send {
        width: 38px;
        height: 38px;
        border-radius: 12px;
    }

    .composer-upload-sheet {
        position: fixed;
        inset-inline: 0.64rem;
        inset-block-end: calc(0.56rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height));
        z-index: 300;
        border-radius: 22px;
        border: 1px solid color-mix(in srgb, var(--chat-border) 90%, transparent);
        background: color-mix(in srgb, var(--chat-sheet-bg) 92%, transparent);
        backdrop-filter: blur(18px);
        box-shadow: 0 24px 48px -32px rgba(14, 24, 38, 0.5);
        padding: 0.44rem;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.32rem;
    }

    .composer-upload-option {
        min-height: 46px;
        border-radius: 14px;
        font-size: 0.74rem;
        font-weight: 830;
    }

    body.chat-page #conversation-manage-bar {
        position: fixed !important;
        inset-inline: 0.56rem !important;
        top: auto !important;
        bottom: calc(0.54rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height)) !important;
        z-index: 200 !important;
        margin: 0 !important;
        border-radius: 20px !important;
        border: 1px solid var(--chat-border) !important;
        background: color-mix(in srgb, var(--chat-sheet-bg) 94%, transparent) !important;
        backdrop-filter: blur(20px) !important;
        padding: 0.44rem 0.64rem !important;
        box-shadow: 0 12px 36px -16px rgba(14, 24, 38, 0.3) !important;
    }

    body.chat-page .conversation-manage-bar__head {
        gap: 0.6rem !important;
    }

    body.chat-page .conversation-manage-bar__head strong {
        flex: 1 !important;
        font-size: 0.82rem !important;
        font-weight: 800 !important;
        color: var(--chat-text) !important;
    }

    body.chat-page .conversation-manage-bar__actions {
        gap: 0.34rem !important;
    }

    body.chat-page .conversation-manage-bar__actions button {
        min-height: 38px !important;
        padding-inline: 0.78rem !important;
        border-radius: 13px !important;
        font-size: 0.74rem !important;
    }

    .chat-context-menu,
    .chat-list-context-menu {
        inset-inline: 0.56rem !important;
        inset-block-start: auto !important;
        inset-block-end: calc(0.54rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height));
        max-width: none;
        width: auto;
        border-radius: 24px;
        padding: 0.58rem;
        transform: translateY(18px) scale(0.98);
    }

    .chat-context-menu.is-open,
    .chat-list-context-menu.is-open {
        transform: translateY(0) scale(1);
    }

    .chat-mobile-nav {
        inset-inline: 0.72rem;
        inset-block-end: calc(0.34rem + env(safe-area-inset-bottom, 0px));
        border-radius: 999px;
        border: 1px solid color-mix(in srgb, var(--chat-border) 90%, transparent);
        background: color-mix(in srgb, var(--chat-pane-bg-strong) 84%, transparent);
        backdrop-filter: blur(24px);
        box-shadow: 0 18px 40px -30px rgba(16, 26, 41, 0.62);
        padding: 0.34rem;
        display: flex;
        align-items: stretch;
        gap: 0.24rem;
    }

    .chat-mobile-nav__item {
        flex: 1 1 0;
        min-height: 54px;
        border-radius: 999px;
        font-size: 0.72rem;
        gap: 0.09rem;
    }

    .chat-mobile-nav__item svg {
        width: 20px;
        height: 20px;
    }

    .chat-mobile-nav__item.is-active {
        background: color-mix(in srgb, var(--chat-accent) 16%, transparent);
        border-color: color-mix(in srgb, var(--chat-accent) 34%, var(--chat-border));
    }

    .toast {
        bottom: calc(1.12rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height));
    }
}

@media (max-width: 680px) {
    .conversation-pane__header {
        padding-inline: 0.56rem;
    }

    .conversation-search-wrap,
    .conversation-filter-tabs {
        padding-inline: 0.56rem;
    }

    .conversation-list {
        padding-inline: 0.46rem;
    }

    .thread-head {
        padding-inline: 0.42rem;
    }

    .messages {
        padding-inline: 0.38rem;
    }

    .msg-bubble {
        max-width: 89.5%;
    }

    .chat-mobile-nav {
        inset-inline: 0.54rem;
    }
}

/* Mobile stability + readability hardening */
body.chat-page {
    font-size: clamp(16px, 0.28vw + 15px, 18px);
}

html,
body.chat-page {
    background-color: var(--chat-statusbar-color, var(--bg-body-strong));
}

body.chat-page::before {
    content: "";
    position: fixed;
    inset-block-start: 0;
    inset-inline: 0;
    height: calc(env(safe-area-inset-top, 0px) + 2px);
    background: var(--chat-statusbar-color);
    pointer-events: none;
    z-index: 40;
}

body.chat-page .conversation-item,
body.chat-page .conversation-item *,
body.chat-page .msg-item,
body.chat-page .msg-item *,
body.chat-page .thread-head,
body.chat-page .thread-head *,
body.chat-page .chat-mobile-nav,
body.chat-page .chat-mobile-nav * {
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

body.chat-page textarea,
body.chat-page input,
body.chat-page [contenteditable="true"] {
    -webkit-user-select: text;
    user-select: text;
    -webkit-touch-callout: default;
}

.conversation-list,
.messages {
    overscroll-behavior: contain;
}

.conversation-item__main,
.msg-item,
.msg-bubble {
    touch-action: manipulation;
}

@media (min-width: 981px) {
    .conversation-item__title {
        font-size: 0.94rem;
    }

    .conversation-item__preview {
        font-size: 0.84rem;
    }

    .msg-text {
        font-size: 0.9rem;
    }
}

@media (max-width: 980px) {
    body.chat-page,
    .chat-app,
    .chat-app__main,
    .chat-stage {
        height: var(--chat-vh, 100dvh);
        min-height: var(--chat-vh, 100dvh);
    }

    .chat-app[data-mobile-view="list"] .conversation-pane,
    .chat-app[data-mobile-view="thread"] .thread-pane {
        transform: none;
    }

    body.chat-page input,
    body.chat-page textarea,
    body.chat-page select,
    .conversation-search-wrap input,
    .composer-entry textarea {
        font-size: 16px !important;
    }

    body.chat-page.chat-keyboard-open .conversation-pane,
    body.chat-page.chat-keyboard-open .thread-pane {
        transition: none;
    }

    .conversation-item__title {
        font-size: 1.04rem;
    }

    .conversation-item__preview {
        font-size: 0.86rem;
    }

    .msg-text {
        font-size: 1rem;
    }

    .thread-head__copy strong {
        font-size: 1.06rem;
    }

    .composer-entry textarea {
        min-height: 44px;
    }
}

/* Conversation list refinement */
@media (min-width: 981px) {
    .chat-stage {
        grid-template-columns: minmax(410px, 470px) minmax(0, 1fr);
        gap: 0.38rem;
    }

    .conversation-pane {
        display: flex;
        flex-direction: column;
        min-height: 0;
    }

    .conversation-pane__header,
    .conversation-search-wrap,
    .conversation-filter-tabs,
    .conversation-manage-bar,
    .conversation-empty {
        flex: 0 0 auto;
    }

    .conversation-list {
        flex: 1 1 auto;
        min-height: 0;
        padding: 0 0.4rem 0.46rem;
        gap: 0.18rem;
    }

    .conversation-item {
        position: relative;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: stretch;
        gap: 0.34rem;
    }

    .conversation-item__main {
        min-height: 88px;
        padding: 0.78rem 0.92rem;
        gap: 0.82rem;
        border-radius: 20px;
        border-color: color-mix(in srgb, var(--chat-border) 84%, transparent);
        background: color-mix(in srgb, var(--chat-control-bg) 78%, transparent);
        box-shadow: 0 16px 32px -28px rgba(17, 31, 50, 0.24);
    }

    .conversation-item__main::before,
    .conversation-item__kind,
    .conversation-badge {
        display: none;
    }

    .conversation-item__main:hover,
    .conversation-item__main:focus-visible {
        transform: translateY(-1px);
        border-color: color-mix(in srgb, var(--chat-accent) 34%, var(--chat-border));
        background: color-mix(in srgb, var(--chat-control-bg-hover) 94%, transparent);
    }

    .conversation-item.is-active .conversation-item__main {
        border-color: color-mix(in srgb, var(--chat-accent) 38%, var(--chat-border));
        background: color-mix(in srgb, var(--chat-accent) 11%, var(--chat-control-bg-hover));
        box-shadow: 0 20px 38px -30px color-mix(in srgb, var(--chat-accent) 32%, transparent);
    }

    .conversation-item__avatar {
        width: 58px;
        height: 58px;
        font-size: 1rem;
        box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
    }

    .conversation-item__copy {
        gap: 0.24rem;
        align-content: center;
    }

    .conversation-item__head {
        gap: 0.5rem;
        align-items: start;
    }

    .conversation-item__title {
        display: -webkit-box;
        overflow: hidden;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        font-size: 1rem;
        line-height: 1.32;
        font-weight: 900;
    }

    .conversation-item__preview-row {
        min-width: 0;
        display: grid;
        grid-template-columns: max-content minmax(0, 1fr);
        align-items: start;
        gap: 0.42rem;
    }

    .conversation-item__subtitle {
        display: inline-flex;
        align-items: center;
        min-height: 22px;
        padding-inline: 0.48rem;
        border-radius: 999px;
        background: color-mix(in srgb, var(--chat-accent) 14%, transparent);
        color: var(--chat-accent);
        font-size: 0.66rem;
        font-weight: 810;
        white-space: nowrap;
        flex: 0 0 auto;
    }

    .conversation-item__preview {
        display: -webkit-box;
        overflow: hidden;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        font-size: 0.85rem;
        line-height: 1.52;
    }

    .conversation-item__meta {
        min-width: 3.9rem;
        align-self: stretch;
        justify-items: end;
        align-content: space-between;
        gap: 0.28rem;
        padding-block: 0.06rem;
    }

    .conversation-item__time {
        font-size: 0.75rem;
        font-weight: 780;
        white-space: nowrap;
    }

    .conversation-item__flags {
        gap: 0.24rem;
    }

    .conversation-item__unread {
        min-width: 24px;
        height: 24px;
        padding-inline: 0.38rem;
        font-size: 0.68rem;
        font-weight: 880;
        box-shadow: 0 10px 18px -16px color-mix(in srgb, var(--chat-accent) 72%, transparent);
    }

    .conversation-item__tools {
        position: static;
        align-self: center;
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 0.26rem;
        opacity: 0;
        pointer-events: none;
        transform: none;
        transition: opacity var(--motion-fast, 0.18s) ease;
    }

    .conversation-item:hover .conversation-item__tools,
    .conversation-item:focus-within .conversation-item__tools,
    body.chat-page.chat-selection-mode .conversation-item__tools {
        opacity: 1;
        pointer-events: auto;
    }

    .conversation-item__more,
    .conversation-item__select {
        width: 32px;
        height: 32px;
        border-radius: 12px;
        border-color: color-mix(in srgb, var(--chat-border) 88%, transparent);
        background: color-mix(in srgb, var(--chat-control-bg) 96%, transparent);
        box-shadow: 0 14px 26px -22px rgba(18, 30, 48, 0.34);
    }

    body.chat-page:not(.chat-selection-mode) .conversation-item__select {
        display: none;
    }
}

@media (max-width: 980px) {
    .chat-stage {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .conversation-list {
        padding: 0 0.48rem calc(0.84rem + var(--chat-local-nav-height));
        gap: 0;
    }

    .conversation-item__main {
        min-height: 76px;
        padding-block: 0.54rem;
        padding-inline: 0.08rem;
        border-radius: 0;
        border: 0;
        border-bottom: 1px solid color-mix(in srgb, var(--chat-border) 76%, transparent);
        background: transparent;
    }

    .conversation-item__avatar {
        width: 52px;
        height: 52px;
        font-size: 0.9rem;
    }

    .conversation-item__title {
        font-size: 1rem;
    }

    .conversation-item__subtitle {
        min-height: 19px;
        padding-inline: 0.4rem;
        font-size: 0.61rem;
    }

    .conversation-item__preview {
        font-size: 0.84rem;
    }

    .conversation-item__time {
        font-size: 0.74rem;
    }

    .conversation-item__tools {
        display: none;
    }
}

/* Premium chat final overrides */
.conversation-pane {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.conversation-pane__header,
.conversation-search-wrap,
.conversation-filter-tabs,
.conversation-manage-bar,
.conversation-empty {
    flex: 0 0 auto;
}

.conversation-filter-tabs {
    align-content: flex-start;
    height: auto;
    margin: 0;
}

.conversation-list {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

@media (max-width: 980px) {
    .conversation-pane {
        display: flex;
    }

    .conversation-filter-tabs {
        padding-top: 0.12rem;
        padding-bottom: 0.62rem;
    }

    .conversation-list {
        flex: 1 1 auto;
        min-height: 0;
        overflow: auto;
    }
}

/* Stage 1: full-screen telegram-like frame */
body.chat-page {
    --chat-shell-offset: 0px;
    --chat-frame-bg: #e8edf3;
    --chat-header-solid: #f7f9fc;
    --chat-panel-solid: #ffffff;
    --chat-stream-solid: #e9dcc6;
    --chat-border-soft: color-mix(in srgb, var(--chat-border, #c7d2df) 76%, transparent);
    background: var(--chat-frame-bg);
}

body.chat-page .background-overlay {
    background:
        radial-gradient(circle at 56% 18%, rgba(138, 183, 230, 0.2), transparent 42%),
        linear-gradient(180deg, #ecf1f7 0%, #e6ecf3 100%);
    opacity: 1;
}

body.chat-page .chat-app {
    width: 100% !important;
    max-width: none !important;
    min-height: var(--chat-vh, 100dvh) !important;
    height: var(--chat-vh, 100dvh) !important;
    max-height: none !important;
    margin: 0 !important;
    padding: 0 !important;
    gap: 0 !important;
    border-radius: 0 !important;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
}

body.chat-page .chat-app::before {
    display: none !important;
}

body.chat-page .chat-app__header,
body.chat-page .chat-login-panel,
body.chat-page .chat-stage,
body.chat-page .conversation-pane,
body.chat-page .thread-pane {
    border-radius: 0 !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
}

body.chat-page .chat-app__header {
    position: sticky;
    top: 0;
    z-index: 120;
    border: 0 !important;
    border-bottom: 1px solid var(--chat-border-soft) !important;
    background: var(--chat-header-solid) !important;
    padding: calc(0.48rem + env(safe-area-inset-top, 0px)) 0.84rem 0.56rem !important;
}

body.chat-page .chat-app__identity h1,
body.chat-page .chat-app__identity p {
    color: var(--text-primary);
}

body.chat-page .chat-app__identity p {
    color: var(--text-secondary);
}

body.chat-page .chat-back,
body.chat-page .chat-top-btn,
body.chat-page .conversation-pane__icon-btn,
body.chat-page .conversation-pane__close,
body.chat-page .thread-head__mobile-btn {
    background: #f1f5fa;
    border-color: var(--chat-border-soft);
    color: var(--text-primary);
}

body.chat-page .chat-app__main {
    min-height: 0;
    height: 100%;
    padding: 0;
}

body.chat-page .chat-stage {
    border: 0 !important;
    background: var(--chat-panel-solid) !important;
    grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
    gap: 0;
    min-height: 0;
    height: 100%;
    padding: 0 !important;
}

body.chat-page .chat-login-panel {
    border: 1px solid var(--chat-border-soft) !important;
    border-radius: 20px !important;
    background: var(--chat-panel-solid) !important;
    margin: auto;
    width: min(560px, calc(100% - 1.2rem));
    box-shadow: 0 24px 40px -30px rgba(17, 34, 57, 0.28) !important;
}

body.chat-page .conversation-pane {
    border: 0 !important;
    border-inline-end: 1px solid var(--chat-border-soft) !important;
    background: #f8fbff !important;
}

body.chat-page .thread-pane {
    border: 0 !important;
    background: var(--chat-panel-solid) !important;
}

body.chat-page .conversation-pane__header,
body.chat-page .thread-head {
    border-bottom: 1px solid var(--chat-border-soft) !important;
    background: #f8fbff !important;
    padding: 0.62rem 0.8rem 0.58rem !important;
}

body.chat-page .thread-shell {
    position: relative;
    height: 100%;
    min-height: 0;
    display: grid;
    grid-template-rows: auto auto auto auto minmax(0, 1fr) auto;
}

body.chat-page .thread-shell > .thread-stream {
    grid-row: 5;
}

body.chat-page .thread-shell > .composer {
    grid-row: 6;
}

body.chat-page .chat-drop-overlay {
    position: absolute;
    inset: 0;
    z-index: 30;
    display: grid;
    place-items: center;
    background: rgba(15, 23, 42, 0.55);
    pointer-events: none;
}

body.chat-page .chat-drop-overlay__card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding: 1.4rem 1.8rem;
    border: 2px dashed rgba(255, 255, 255, 0.7);
    border-radius: 1rem;
    background: rgba(15, 23, 42, 0.35);
    color: #fff;
    text-align: center;
}

body.chat-page .chat-drop-overlay__card svg {
    width: 36px;
    height: 36px;
}

body.chat-page .chat-drop-overlay__card strong {
    font-size: 0.98rem;
}

body.chat-page .chat-drop-overlay__card span {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.75);
}

body.chat-page .thread-stream {
    min-height: 0 !important;
    background: var(--chat-stream-solid) !important;
}

body.chat-page .messages {
    padding: 0.78rem 0.68rem 0.94rem !important;
    /* Ensure the messages pane remains scrollable when running as the chat app shell */
    min-height: 0 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
}

body.chat-page .composer {
    border-top: 1px solid var(--chat-border-soft) !important;
    background: var(--chat-panel-solid) !important;
    padding: 0.44rem 0.58rem calc(0.56rem + env(safe-area-inset-bottom, 0px)) !important;
}

body.chat-page .composer-box {
    border-radius: 20px !important;
    border-color: var(--chat-border-soft) !important;
    background: #f2f6fb !important;
}

body.chat-page .composer-entry textarea {
    max-height: 142px;
    min-height: 42px;
}

body.chat-page .chat-mobile-nav {
    border-color: var(--chat-border-soft);
    background: rgba(247, 250, 252, 0.95);
}

@media (max-width: 980px) {
    body.chat-page.chat-mobile-nav-visible {
        --chat-local-nav-height: calc(66px + env(safe-area-inset-bottom, 0px));
    }

    body.chat-page .chat-app {
        min-height: var(--chat-vh, 100dvh) !important;
        height: var(--chat-vh, 100dvh) !important;
    }

    body.chat-page .chat-app__header {
        padding-inline: 0.7rem !important;
    }

    body.chat-page .chat-stage {
        grid-template-columns: 1fr !important;
    }

    body.chat-page .conversation-pane,
    body.chat-page .thread-pane {
        border-inline-end: 0 !important;
        background: var(--chat-panel-solid) !important;
    }

    body.chat-page .thread-head {
        position: sticky;
        top: 0;
        z-index: 8;
    }

    body.chat-page .composer {
        position: sticky;
        bottom: 0;
        z-index: 9;
        padding-bottom: calc(0.52rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height)) !important;
    }

    body.chat-page.chat-keyboard-open {
        --chat-local-nav-height: 0px;
    }

    body.chat-page.chat-keyboard-open .chat-mobile-nav {
        visibility: hidden;
        pointer-events: none;
    }
}

/* Reference-inspired polish layer (original implementation, not a clone) */
body.chat-page {
    --chat-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
    --chat-ref-bg:
        radial-gradient(circle at 8% 0%, color-mix(in srgb, var(--accent-color) 12%, transparent), transparent 24%),
        radial-gradient(circle at 90% 12%, color-mix(in srgb, var(--accent-color) 8%, transparent), transparent 28%),
        linear-gradient(180deg, color-mix(in srgb, var(--bg-body) 92%, #fff), var(--bg-body-strong));
    --chat-row-height: 74px;
    --chat-soft-line: color-mix(in srgb, var(--border-color) 82%, transparent);
    --chat-soft-surface: color-mix(in srgb, var(--surface-solid) 97%, transparent);
    --chat-soft-muted: color-mix(in srgb, var(--surface-muted) 92%, #fff);
    --chat-thread-bg: color-mix(in srgb, var(--surface-strong) 58%, #fff);
    --chat-bubble-me: color-mix(in srgb, var(--accent-color) 13%, #f7fbff);
    --chat-bubble-peer: color-mix(in srgb, var(--surface-solid) 92%, #fff);
    --chat-nav-glass: color-mix(in srgb, var(--surface-solid) 86%, transparent);
    --chat-shadow-soft: 0 16px 44px -36px rgba(19, 35, 62, 0.22);
    background: var(--chat-ref-bg);
    color: var(--text-primary);
}

body.chat-page .background-overlay {
    background: transparent;
}

body.chat-page .chat-app {
    width: min(1520px, calc(100% - 1.1rem));
    max-width: 1520px;
    min-height: var(--chat-vh, 100dvh);
    height: var(--chat-vh, 100dvh);
    margin: 0 auto;
    padding: calc(0.5rem + env(safe-area-inset-top, 0px)) 0.54rem calc(0.54rem + env(safe-area-inset-bottom, 0px));
    gap: 0.52rem;
}

body.chat-page .chat-app__header {
    position: sticky;
    top: 0;
    z-index: 120;
    border: 1px solid var(--chat-soft-line) !important;
    border-radius: 24px !important;
    background: color-mix(in srgb, var(--surface-solid) 86%, transparent) !important;
    backdrop-filter: blur(18px) saturate(1.05) !important;
    box-shadow: var(--chat-shadow-soft) !important;
    padding: 0.58rem 0.72rem !important;
}

body.chat-page .chat-app__identity h1 {
    font-family: var(--font-accent);
    font-weight: 820;
    letter-spacing: -0.012em;
}

body.chat-page .chat-app__identity p {
    color: var(--text-secondary);
    line-height: 1.6;
}

body.chat-page .chat-back,
body.chat-page .chat-top-btn,
body.chat-page .conversation-pane__icon-btn,
body.chat-page .thread-head__mobile-btn,
body.chat-page .conversation-pane__close {
    background: var(--chat-soft-muted) !important;
    border: 1px solid var(--chat-soft-line) !important;
    box-shadow: none !important;
    transition: transform 0.18s var(--chat-ease), background-color 0.18s ease, border-color 0.18s ease;
}

body.chat-page .chat-back:hover,
body.chat-page .chat-top-btn:hover,
body.chat-page .conversation-pane__icon-btn:hover,
body.chat-page .thread-head__mobile-btn:hover,
body.chat-page .conversation-pane__close:hover,
body.chat-page .chat-back:focus-visible,
body.chat-page .chat-top-btn:focus-visible,
body.chat-page .conversation-pane__icon-btn:focus-visible,
body.chat-page .thread-head__mobile-btn:focus-visible,
body.chat-page .conversation-pane__close:focus-visible {
    transform: translateY(-1px);
    border-color: var(--border-color-strong) !important;
}

body.chat-page .chat-stage {
    border-radius: 26px !important;
    border: 1px solid var(--chat-soft-line) !important;
    background: color-mix(in srgb, var(--surface-solid) 96%, transparent) !important;
    box-shadow: var(--chat-shadow-soft) !important;
    grid-template-columns: minmax(340px, 410px) minmax(0, 1fr);
    gap: 0 !important;
}

body.chat-page .conversation-pane {
    background: linear-gradient(180deg, #fcfdff 0%, #f8fbff 100%) !important;
    border-inline-end: 1px solid var(--chat-soft-line) !important;
}

body.chat-page .thread-pane {
    background: var(--chat-soft-surface) !important;
}

body.chat-page .conversation-pane__header,
body.chat-page .thread-head {
    border-bottom: 1px solid var(--chat-soft-line) !important;
    background: color-mix(in srgb, var(--surface-solid) 91%, #fff) !important;
    backdrop-filter: blur(16px);
}

body.chat-page .conversation-search-wrap input,
body.chat-page .chat-modal__fields input,
body.chat-page .chat-modal__fields textarea,
body.chat-page #edit-text {
    background: color-mix(in srgb, var(--surface-muted) 90%, #fff) !important;
    border-color: var(--chat-soft-line) !important;
    color: var(--text-primary) !important;
    transition: border-color var(--motion-fast, 0.18s) ease, box-shadow var(--motion-fast, 0.18s) ease, background-color var(--motion-fast, 0.18s) ease;
}

body.chat-page .conversation-search-wrap input:focus,
body.chat-page .chat-modal__fields input:focus,
body.chat-page .chat-modal__fields textarea:focus,
body.chat-page #edit-text:focus {
    border-color: color-mix(in srgb, var(--accent-color) 40%, var(--chat-soft-line)) !important;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-color) 14%, transparent) !important;
    background: #fff !important;
}

body.chat-page .conversation-filter-tabs {
    gap: 0.34rem;
    padding-bottom: 0.66rem;
}

body.chat-page .conversation-filter-tab {
    min-height: 34px;
    border-radius: 999px;
    border: 1px solid var(--chat-soft-line);
    background: color-mix(in srgb, var(--surface-muted) 90%, #fff);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 700;
    transition: background-color var(--motion-fast, 0.18s) ease, color var(--motion-fast, 0.18s) ease, border-color var(--motion-fast, 0.18s) ease;
}

body.chat-page .conversation-filter-tab.is-active {
    color: var(--accent-color);
    border-color: color-mix(in srgb, var(--accent-color) 26%, var(--chat-soft-line));
    background: color-mix(in srgb, var(--accent-color) 10%, #fff);
    box-shadow: none;
}

body.chat-page .conversation-list {
    padding: 0 0.56rem 0.74rem;
    gap: 0.08rem;
}

body.chat-page .conversation-item__main {
    min-height: var(--chat-row-height);
    border-radius: 0;
    border: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--chat-soft-line) 88%, transparent);
    background: transparent;
    padding: 0.58rem 0.3rem;
    transition: background-color var(--motion-fast, 0.18s) ease, border-color var(--motion-fast, 0.18s) ease;
}

body.chat-page .conversation-item__main::before {
    inset-inline-start: 0;
    inset-block: 10px;
    width: 3px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--accent-color) 70%, #6ea2ff);
    opacity: 0;
    transition: opacity 0.18s ease;
}

body.chat-page .conversation-item__main:hover,
body.chat-page .conversation-item__main:focus-visible {
    background: color-mix(in srgb, var(--accent-color) 4%, transparent);
    border-color: color-mix(in srgb, var(--accent-color) 22%, var(--chat-soft-line));
}

body.chat-page .conversation-item.is-active .conversation-item__main {
    background: color-mix(in srgb, var(--accent-color) 8%, #f8fbff);
    border-color: color-mix(in srgb, var(--accent-color) 26%, var(--chat-soft-line));
    box-shadow: none;
}

body.chat-page .conversation-item.is-active .conversation-item__main::before {
    opacity: 1;
}

body.chat-page .conversation-item__avatar,
body.chat-page .thread-head__avatar {
    border-radius: 50%;
    box-shadow: none;
}

body.chat-page .conversation-item__title {
    color: var(--text-primary);
    font-weight: 780;
}

body.chat-page .conversation-item__preview,
body.chat-page .conversation-item__time,
body.chat-page .conversation-item__subtitle,
body.chat-page .thread-head__copy span {
    color: var(--text-secondary);
}

body.chat-page .thread-stream,
body.chat-page .messages,
body.chat-page .stream-state {
    background:
        radial-gradient(circle at 50% 0, color-mix(in srgb, var(--accent-color) 7%, transparent), transparent 34%),
        linear-gradient(180deg, color-mix(in srgb, var(--chat-thread-bg) 72%, #fff), var(--chat-thread-bg));
}

body.chat-page .messages {
    padding: 0.8rem 0.84rem 1rem !important;
}

body.chat-page .msg-bubble {
    border-color: color-mix(in srgb, var(--border-color) 84%, transparent);
    background: var(--chat-bubble-peer);
    border-radius: 18px;
    box-shadow: 0 8px 18px -16px rgba(17, 36, 63, 0.24);
}

body.chat-page .msg-item.me .msg-bubble {
    background: var(--chat-bubble-me);
    border-color: color-mix(in srgb, var(--accent-color) 20%, var(--border-color));
}

body.chat-page .msg-text {
    direction: rtl;
    unicode-bidi: isolate;
    color: var(--text-primary);
    line-height: 1.78;
}

body.chat-page .msg-foot,
body.chat-page .msg-delivery,
body.chat-page .msg-time,
body.chat-page .msg-name {
    color: var(--text-tertiary);
}

body.chat-page .composer {
    border-top: 1px solid var(--chat-soft-line) !important;
    background: color-mix(in srgb, var(--surface-solid) 88%, transparent) !important;
    backdrop-filter: blur(16px) saturate(1.05);
    padding: 0.46rem 0.62rem calc(0.54rem + env(safe-area-inset-bottom, 0px) + var(--chat-local-nav-height, 0px)) !important;
}

body.chat-page .composer-box {
    border-radius: 999px !important;
    background: color-mix(in srgb, var(--surface-muted) 94%, #fff) !important;
    border: 1px solid var(--chat-soft-line) !important;
    box-shadow: none !important;
    padding: 0.24rem;
}

body.chat-page .composer-box:focus-within {
    border-color: color-mix(in srgb, var(--accent-color) 35%, var(--chat-soft-line)) !important;
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent-color) 10%, transparent) !important;
}

body.chat-page .composer-entry textarea {
    direction: rtl;
    unicode-bidi: isolate;
    min-height: 42px;
    max-height: 172px;
    border: 0;
    border-radius: 999px;
    background: transparent !important;
    color: var(--text-primary);
    padding-inline: 0.72rem;
    line-height: 1.6;
    resize: none;
}

body.chat-page .composer-tool,
body.chat-page .composer-send {
    border-radius: 999px;
    width: 40px;
    height: 40px;
}

body.chat-page .composer-tool {
    background: color-mix(in srgb, var(--surface-muted) 92%, #fff);
    border-color: var(--chat-soft-line);
    color: var(--text-secondary);
}

body.chat-page .composer-send {
    color: var(--text-on-accent);
    background: var(--btn-gradient);
    border-color: transparent;
}

body.chat-page .chat-modal-backdrop,
body.chat-page .chat-sheet-backdrop {
    background: color-mix(in srgb, var(--overlay-backdrop) 86%, transparent);
    backdrop-filter: blur(3px);
}

body.chat-page .chat-modal,
body.chat-page .chat-info-sheet {
    border-radius: 24px !important;
    border: 1px solid var(--chat-soft-line) !important;
    background: color-mix(in srgb, var(--surface-solid) 96%, transparent) !important;
    box-shadow: 0 22px 54px -34px rgba(16, 29, 48, 0.28);
}

body.chat-page .chat-mobile-nav {
    border: 1px solid var(--chat-soft-line);
    background: var(--chat-nav-glass);
    backdrop-filter: blur(20px);
}

body.chat-page .chat-mobile-nav__item {
    min-height: 52px;
    font-weight: 700;
}

body.chat-page .chat-mobile-nav__item.is-active {
    background: color-mix(in srgb, var(--accent-color) 12%, transparent);
    border-color: color-mix(in srgb, var(--accent-color) 24%, var(--chat-soft-line));
    color: var(--accent-strong);
}

@media (max-width: 980px) {
    body.chat-page,
    body.chat-page input,
    body.chat-page select,
    body.chat-page textarea {
        font-size: 16px !important;
    }

    body.chat-page .chat-app {
        width: 100%;
        padding: 0;
        gap: 0;
    }

    body.chat-page .chat-app__header,
    body.chat-page .chat-stage,
    body.chat-page .conversation-pane,
    body.chat-page .thread-pane {
        border-radius: 0 !important;
        box-shadow: none !important;
    }

    body.chat-page .chat-app__header {
        border-inline: 0 !important;
        border-top: 0 !important;
        padding: calc(0.34rem + env(safe-area-inset-top, 0px)) 0.58rem 0.42rem !important;
        background: color-mix(in srgb, var(--surface-solid) 94%, transparent) !important;
    }

    body.chat-page .conversation-list {
        padding: 0 0.44rem calc(0.68rem + var(--chat-local-nav-height));
    }

    body.chat-page .conversation-item__main {
        min-height: 72px;
        padding-inline: 0.12rem;
    }

    body.chat-page .thread-head {
        position: sticky;
        top: 0;
        z-index: 12;
    }

    body.chat-page .messages {
        padding: 0.7rem 0.46rem 0.86rem !important;
    }

    body.chat-page .msg-bubble {
        max-width: 88%;
        border-radius: 16px;
    }

    body.chat-page .composer {
        position: sticky;
        bottom: 0;
        z-index: 14;
    }

    body.chat-page .composer-box {
        border-radius: 20px !important;
    }

    body.chat-page .composer-entry textarea {
        border-radius: 14px;
    }

    body.chat-page.chat-keyboard-open .composer,
    body.chat-page.chat-keyboard-open .conversation-pane,
    body.chat-page.chat-keyboard-open .thread-pane {
        transition: none !important;
    }

    body.chat-page .chat-modal {
        inset-inline: 0.54rem;
        inset-block-end: calc(0.52rem + env(safe-area-inset-bottom, 0px));
        max-height: min(82vh, 680px);
        border-radius: 22px !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    body.chat-page *,
    body.chat-page *::before,
    body.chat-page *::after {
        transition: none !important;
        animation: none !important;
    }
}

html[data-performance-mode="lite"] body.chat-page .messages {
    scroll-behavior: auto;
}

html[data-performance-mode="lite"] body.chat-page .msg-item.is-new {
    animation: none;
}

html[data-performance-mode="lite"] body.chat-page .chat-modal,
html[data-performance-mode="lite"] body.chat-page .chat-modal-backdrop,
html[data-performance-mode="lite"] body.chat-page .chat-sheet-backdrop,
html[data-performance-mode="lite"] body.chat-page .chat-context-backdrop,
html[data-performance-mode="lite"] body.chat-page .chat-list-context-backdrop,
html[data-performance-mode="lite"] body.chat-page .chat-context-menu,
html[data-performance-mode="lite"] body.chat-page .chat-list-context-menu,
html[data-performance-mode="lite"] body.chat-page .chat-info-sheet,
html[data-performance-mode="lite"] body.chat-page .composer-upload-sheet,
html[data-performance-mode="lite"] body.chat-page .chat-mobile-nav {
    backdrop-filter: none !important;
}

/* Bale-style flat chat shell. Keep this final so earlier redesign layers cannot collapse mobile. */
body.chat-page {
    --chat-bale-line: color-mix(in srgb, var(--border-color) 78%, transparent);
    --chat-bale-ink: var(--text-primary);
    --chat-bale-muted: var(--text-secondary);
    --chat-bale-soft: var(--surface-muted);
    --chat-bale-green: var(--success-color);
    --chat-local-nav-height: 78px;
    background: var(--bg-body) !important;
    color: var(--chat-bale-ink) !important;
}

body.chat-page .background-overlay,
body.chat-page .chat-app::before {
    display: none !important;
}

body.chat-page .chat-app {
    width: min(1366px, 100%) !important;
    max-width: 1366px !important;
    min-height: var(--chat-vh, 100dvh) !important;
    height: var(--chat-vh, 100dvh) !important;
    padding: 0 !important;
    gap: 0 !important;
    background: var(--surface-solid) !important;
}

body.chat-page .chat-app__header {
    min-height: 60px !important;
    border: 0 !important;
    border-bottom: 1px solid var(--chat-bale-line) !important;
    border-radius: 0 !important;
    background: var(--surface-solid) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
}

body.chat-page .conversation-pane__header-actions {
    padding: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
}

body.chat-page .chat-stage {
    height: calc(var(--chat-vh, 100dvh) - 61px) !important;
    min-height: 0 !important;
    padding: 0 !important;
    gap: 0 !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: var(--surface-solid) !important;
    box-shadow: none !important;
    overflow: hidden !important;
    grid-template-columns: minmax(340px, 400px) minmax(0, 1fr) !important;
}

body.chat-page .conversation-pane,
body.chat-page .thread-pane {
    min-height: 0 !important;
    height: 100% !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: var(--surface-solid) !important;
    box-shadow: none !important;
}

body.chat-page .conversation-pane {
    border-inline-start: 1px solid var(--chat-bale-line) !important;
}

body.chat-page .conversation-pane__header,
body.chat-page .thread-head {
    min-height: 68px !important;
    padding: 0.74rem 1rem !important;
    border-bottom: 1px solid var(--chat-bale-line) !important;
    background: var(--surface-solid) !important;
    backdrop-filter: none !important;
}

body.chat-page .conversation-pane__title-block h2,
body.chat-page .thread-head__copy strong {
    color: var(--chat-bale-ink) !important;
    font-size: 1rem !important;
    font-weight: 800 !important;
    letter-spacing: 0 !important;
}

body.chat-page .conversation-pane__title-block p,
body.chat-page .thread-head__copy span {
    color: var(--chat-bale-muted) !important;
    font-size: 0.78rem !important;
}

body.chat-page .chat-back,
body.chat-page .chat-top-btn,
body.chat-page .conversation-pane__icon-btn,
body.chat-page .conversation-pane__close,
body.chat-page .thread-head__mobile-btn,
body.chat-page .chat-sheet-close {
    width: 40px !important;
    height: 40px !important;
    border: 0 !important;
    border-radius: 50% !important;
    background: transparent !important;
    color: var(--chat-bale-muted) !important;
    box-shadow: none !important;
}

body.chat-page .conversation-search-wrap {
    padding: 0.6rem 0.72rem 0.35rem !important;
}

body.chat-page .conversation-search-wrap input {
    min-height: 48px !important;
    border: 1px solid var(--chat-bale-line) !important;
    border-radius: 16px !important;
    background: var(--chat-bale-soft) !important;
    color: var(--chat-bale-ink) !important;
    box-shadow: none !important;
}

body.chat-page .conversation-filter-tabs {
    display: flex !important;
    gap: 0 !important;
    min-height: 50px !important;
    padding: 0 0.44rem !important;
    border-bottom: 1px solid var(--chat-bale-line) !important;
    overflow-x: auto !important;
}

body.chat-page .conversation-filter-tab {
    position: relative !important;
    min-width: max-content !important;
    min-height: 50px !important;
    padding: 0 0.78rem !important;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
    color: var(--chat-bale-muted) !important;
    box-shadow: none !important;
    font-size: 0.82rem !important;
    font-weight: 760 !important;
}

body.chat-page .conversation-filter-tab.is-active {
    color: var(--chat-bale-green) !important;
}

body.chat-page .conversation-filter-tab.is-active::after {
    content: "";
    position: absolute;
    inset-inline: 0.62rem;
    bottom: 0;
    height: 3px;
    border-radius: 999px 999px 0 0;
    background: var(--chat-bale-green);
}

body.chat-page .conversation-list {
    flex: 1 1 auto !important;
    min-height: 0 !important;
    padding: 0 !important;
    gap: 0 !important;
    overflow: auto !important;
}

body.chat-page .conversation-item {
    padding: 0 !important;
}

body.chat-page .conversation-item__main {
    min-height: 76px !important;
    grid-template-columns: 56px minmax(0, 1fr) auto !important;
    gap: 0.72rem !important;
    padding: 0.62rem 0.88rem !important;
    border: 0 !important;
    border-bottom: 1px solid var(--chat-bale-line) !important;
    border-radius: 0 !important;
    background: transparent !important;
    box-shadow: none !important;
}

body.chat-page .conversation-item.is-active .conversation-item__main,
body.chat-page .conversation-item__main:hover,
body.chat-page .conversation-item__main:focus-visible {
    background: color-mix(in srgb, var(--accent-color) 9%, var(--surface-solid)) !important;
}

body.chat-page .conversation-item__main::before,
body.chat-page .conversation-item__kind {
    display: none !important;
}

body.chat-page .conversation-item__avatar,
body.chat-page .thread-head__avatar {
    width: 56px !important;
    height: 56px !important;
    border: 0 !important;
    border-radius: 50% !important;
    background: color-mix(in srgb, var(--accent-color) 70%, #ffffff) !important;
    color: var(--text-on-accent) !important;
    box-shadow: none !important;
}

body.chat-page .conversation-item__title {
    color: var(--chat-bale-ink) !important;
    font-size: 0.96rem !important;
    font-weight: 800 !important;
    line-height: 1.45 !important;
}

body.chat-page .conversation-item__preview,
body.chat-page .conversation-item__subtitle,
body.chat-page .conversation-item__time {
    color: var(--chat-bale-muted) !important;
    font-size: 0.78rem !important;
    line-height: 1.5 !important;
}

body.chat-page .conversation-item__unread {
    min-width: 22px !important;
    height: 22px !important;
    border-radius: 999px !important;
    background: var(--chat-bale-green) !important;
    color: var(--text-on-accent) !important;
    box-shadow: none !important;
}

body.chat-page .thread-stream,
body.chat-page .messages,
body.chat-page .stream-state {
    background: var(--bg-body) !important;
}

body.chat-page .msg-bubble {
    border: 1px solid var(--chat-bale-line) !important;
    border-radius: 18px !important;
    background: var(--surface-solid) !important;
    box-shadow: none !important;
}

body.chat-page .msg-item.me .msg-bubble {
    background: color-mix(in srgb, var(--accent-color) 12%, var(--surface-solid)) !important;
    border-color: color-mix(in srgb, var(--accent-color) 26%, var(--chat-bale-line)) !important;
}

body.chat-page .composer {
    border-top: 1px solid var(--chat-bale-line) !important;
    background: var(--surface-solid) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
}

body.chat-page .composer-box {
    min-height: 54px !important;
    border: 1px solid var(--chat-bale-line) !important;
    border-radius: 28px !important;
    background: var(--chat-bale-soft) !important;
    box-shadow: none !important;
}

body.chat-page .composer-entry textarea {
    color: var(--chat-bale-ink) !important;
}

body.chat-page .chat-mobile-nav {
    border: 1px solid var(--chat-bale-line) !important;
    border-radius: 26px !important;
    background: color-mix(in srgb, var(--surface-solid) 94%, transparent) !important;
    box-shadow: 0 12px 30px -24px rgba(19, 35, 62, 0.28) !important;
    backdrop-filter: blur(18px) !important;
}

body.chat-page .chat-mobile-nav__item {
    color: var(--chat-bale-muted) !important;
}

body.chat-page .chat-mobile-nav__item.is-active {
    border-color: color-mix(in srgb, var(--accent-color) 30%, var(--chat-bale-line)) !important;
    background: color-mix(in srgb, var(--accent-color) 12%, var(--surface-solid)) !important;
    color: var(--accent-strong) !important;
}

@media (max-width: 980px) {
    body.chat-page .chat-app {
        width: 100% !important;
        max-width: none !important;
        overflow: hidden !important;
    }

    body.chat-page .chat-app__header {
        display: none !important;
    }

    body.chat-page .chat-app__main,
    body.chat-page .chat-stage {
        display: block !important;
        width: 100% !important;
        height: calc(var(--chat-vh, 100dvh) - var(--chat-local-nav-height)) !important;
        min-height: calc(var(--chat-vh, 100dvh) - var(--chat-local-nav-height)) !important;
        overflow: hidden !important;
    }

    body.chat-page .conversation-pane,
    body.chat-page .thread-pane {
        position: absolute !important;
        inset: 0 !important;
        width: 100% !important;
        height: calc(var(--chat-vh, 100dvh) - var(--chat-local-nav-height)) !important;
        min-height: calc(var(--chat-vh, 100dvh) - var(--chat-local-nav-height)) !important;
        transition: transform 0.2s ease, opacity 0.2s ease !important;
    }

    body.chat-page .chat-app[data-mobile-view="list"] .conversation-pane {
        opacity: 1 !important;
        pointer-events: auto !important;
        transform: translateX(0) !important;
    }

    body.chat-page .chat-app[data-mobile-view="list"] .thread-pane {
        opacity: 0 !important;
        pointer-events: none !important;
        transform: translateX(-100%) !important;
    }

    body.chat-page .chat-app[data-mobile-view="thread"] .conversation-pane {
        opacity: 0 !important;
        pointer-events: none !important;
        transform: translateX(100%) !important;
    }

    body.chat-page .chat-app[data-mobile-view="thread"] .thread-pane {
        opacity: 1 !important;
        pointer-events: auto !important;
        transform: translateX(0) !important;
    }

    body.chat-page .conversation-pane__header,
    body.chat-page .thread-head {
        min-height: 86px !important;
        padding: calc(1rem + env(safe-area-inset-top, 0px)) 1rem 0.74rem !important;
    }

    body.chat-page .conversation-pane__title-block h2 {
        font-size: 1.15rem !important;
    }

    body.chat-page .conversation-pane__title-block p {
        display: none !important;
    }

    body.chat-page .conversation-pane__header-actions {
        gap: 0.22rem !important;
    }

    body.chat-page #mobile-home-link,
    body.chat-page #conversation-manage-btn,
    body.chat-page #mobile-close-list,
    body.chat-page #thread-home-link,
    body.chat-page #refresh-btn {
        display: none !important;
    }

    body.chat-page .conversation-search-wrap {
        padding-inline: 1rem !important;
    }

    body.chat-page .conversation-filter-tabs {
        padding-inline: 0.82rem !important;
    }

    body.chat-page .conversation-list {
        padding-bottom: calc(0.4rem + env(safe-area-inset-bottom, 0px)) !important;
    }

    body.chat-page .conversation-item__main {
        grid-template-columns: 58px minmax(0, 1fr) auto !important;
        min-height: 78px !important;
        padding-inline: 1rem !important;
    }

    body.chat-page .conversation-item__avatar {
        width: 58px !important;
        height: 58px !important;
    }

    body.chat-page .thread-stream {
        min-height: 0 !important;
    }

    body.chat-page .messages {
        padding: 0.72rem 0.62rem 0.9rem !important;
    }

    body.chat-page .composer {
        position: sticky !important;
        bottom: 0 !important;
        padding: 0.5rem 0.58rem calc(0.56rem + env(safe-area-inset-bottom, 0px)) !important;
    }

    body.chat-page .composer-box {
        border-radius: 24px !important;
    }

    body.chat-page .chat-mobile-nav {
        left: 8px !important;
        right: 8px !important;
        bottom: calc(5px + env(safe-area-inset-bottom, 0px)) !important;
        min-height: 64px !important;
        padding: 0.26rem !important;
    }
}