.chat-page {
    height: calc(100dvh - 44px);
    min-height: 620px;
    padding: 18px;
    background: #f4f7fb;
    color: #172033;
    font-family: Inter,"Be Vietnam Pro",sans-serif
}

.chat-shell {
    height: 100%;
    display: grid;
    grid-template-columns: 340px minmax(0,1fr);
    overflow: hidden;
    background: #fff;
    border: 1px solid #e3e9f2;
    border-radius: 20px;
    box-shadow: 0 18px 50px rgba(38,55,84,.1)
}

.chat-sidebar {
    display: flex;
    min-width: 0;
    flex-direction: column;
    border-right: 1px solid #e7ebf2;
    background: #fbfcfe
}

.chat-sidebar-header, .chat-window-header, .chat-modal > header {
    display: flex;
    align-items: center;
    gap: 12px
}

.chat-sidebar-header {
    height: 88px;
    padding: 18px 20px
}

    .chat-sidebar-header h1, .chat-modal h2 {
        margin: 2px 0 0;
        font-size: 1.4rem;
        font-weight: 750
    }

.chat-kicker {
    color: #3765d3;
    font-size: .72rem;
    font-weight: 750;
    letter-spacing: .08em;
    text-transform: uppercase
}

.chat-icon-btn, .chat-back {
    width: 40px;
    height: 40px;
    border: 0;
    border-radius: 12px;
    background: #edf3ff;
    color: #3262cf;
    font-size: 1.05rem
}

.chat-sidebar-header .chat-icon-btn {
    margin-left: auto
}

.chat-search {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 16px 14px;
    padding: 0 12px;
    height: 44px;
    border: 1px solid #e1e7f0;
    border-radius: 12px;
    background: #fff;
    color: #8590a4
}

    .chat-search:focus-within {
        border-color: #7b9be4;
        box-shadow: 0 0 0 3px rgba(55,101,211,.09)
    }

    .chat-search input {
        min-width: 0;
        flex: 1;
        border: 0;
        outline: 0;
        background: transparent;
        color: #202a3c
    }

    .chat-search button {
        border: 0;
        background: transparent;
        color: #3765d3
    }

.chat-conversation-list {
    min-height: 0;
    overflow-y: auto;
    padding: 2px 10px 16px
}

.chat-conversation {
    width: 100%;
    display: grid;
    grid-template-columns: 48px minmax(0,1fr) auto;
    align-items: center;
    gap: 11px;
    padding: 11px 10px;
    border: 0;
    border-radius: 14px;
    background: transparent;
    text-align: left;
    color: inherit
}

    .chat-conversation:hover {
        background: #f0f4fb
    }

    .chat-conversation.is-active {
        background: #e9f0ff
    }

.chat-avatar {
    --avatar-hue: 220;
    position: relative;
    display: inline-grid;
    place-items: center;
    flex: 0 0 auto;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: hsl(var(--avatar-hue) 65% 91%);
    color: hsl(var(--avatar-hue) 60% 35%);
    font-weight: 750
}

.chat-online-badge {
    position: absolute;
    right: 0;
    bottom: 1px;
    width: 12px;
    height: 12px;
    border: 2px solid #fff;
    border-radius: 50%;
    background: #b7c0cd
}

    .chat-online-badge.is-online {
        background: #21b878
    }

.chat-conversation-main {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px
}

    .chat-conversation-main strong {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: .93rem
    }

    .chat-conversation-main small {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        color: #778399
    }

.chat-conversation-meta {
    display: flex;
    align-items: flex-end;
    align-self: stretch;
    flex-direction: column;
    justify-content: center;
    gap: 7px;
    color: #8c96a8;
    font-size: .7rem
}

    .chat-conversation-meta b {
        display: grid;
        min-width: 20px;
        height: 20px;
        padding: 0 5px;
        place-items: center;
        border-radius: 20px;
        background: #3765d3;
        color: #fff;
        font-size: .68rem
    }

.chat-empty {
    display: grid;
    place-items: center;
    padding: 55px 20px;
    color: #8a95a7;
    text-align: center
}

    .chat-empty > i {
        font-size: 2.5rem;
        color: #b4c2dc
    }

    .chat-empty button {
        border: 0;
        background: none;
        color: #3765d3;
        font-weight: 700
    }

.chat-window {
    min-width: 0;
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg,#f9fbff 0,#f6f8fc 100%)
}

.chat-window-header {
    height: 88px;
    padding: 14px 22px;
    border-bottom: 1px solid #e4e9f1;
    background: rgba(255,255,255,.94)
}

    .chat-window-header h2 {
        margin: 0;
        font-size: 1.04rem;
        font-weight: 750
    }

    .chat-window-header small {
        color: #768298
    }

    .chat-window-header .chat-avatar {
        width: 45px;
        height: 45px
    }

.chat-back {
    display: none
}

.chat-welcome {
    display: grid;
    height: 100%;
    place-content: center;
    justify-items: center;
    padding: 30px;
    text-align: center;
    color: #79869b
}

    .chat-welcome > div {
        display: grid;
        width: 82px;
        height: 82px;
        place-items: center;
        border-radius: 28px;
        background: #e8efff;
        color: #3765d3;
        font-size: 2.2rem
    }

    .chat-welcome h2 {
        margin: 18px 0 6px;
        color: #263249
    }

.chat-messages {
    min-height: 0;
    flex: 1;
    overflow-y: auto;
    padding: 22px clamp(16px,4vw,55px)
}

.chat-load-more {
    display: block;
    margin: 0 auto 22px;
    padding: 8px 14px;
    border: 1px solid #dbe3ef;
    border-radius: 20px;
    background: #fff;
    color: #536178;
    font-size: .78rem
}

.chat-message {
    display: flex;
    justify-content: flex-start;
    margin: 8px 0
}

    .chat-message.is-mine {
        justify-content: flex-end
    }

.chat-bubble {
    max-width: min(72%,620px);
    padding: 10px 13px 7px;
    border: 1px solid #e1e6ee;
    border-radius: 6px 18px 18px 18px;
    background: #fff;
    box-shadow: 0 3px 10px rgba(38,55,84,.05)
}

.chat-message.is-mine .chat-bubble {
    border-color: #3765d3;
    border-radius: 18px 6px 18px 18px;
    background: #3765d3;
    color: #fff
}

.chat-sender {
    margin-bottom: 4px;
    color: #3765d3;
    font-size: .75rem;
    font-weight: 750
}

.chat-reply-preview {
    margin-bottom: 7px;
    padding: 7px 9px;
    border-left: 3px solid #8eaae8;
    border-radius: 6px;
    background: rgba(55,101,211,.08);
    overflow: hidden;
    color: #59677e;
    font-size: .76rem;
    text-overflow: ellipsis;
    white-space: nowrap
}

.chat-message.is-mine .chat-reply-preview {
    border-color: #c9d8ff;
    background: rgba(255,255,255,.14);
    color: #eaf0ff
}

.chat-message-text {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    font-size: .91rem;
    line-height: 1.5
}

.chat-recalled {
    color: #7f8a9d;
    font-size: .86rem;
    font-style: italic
}

.chat-message.is-mine .chat-recalled {
    color: #e0e8fc
}

.chat-bubble footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 5px;
    margin-top: 5px;
    color: #98a1b0;
    font-size: .65rem
}

    .chat-bubble footer button {
        display: grid;
        width: 25px;
        height: 24px;
        place-items: center;
        border: 0;
        border-radius: 8px;
        background: transparent;
        color: inherit;
        opacity: .7
    }

        .chat-bubble footer button:hover {
            background: rgba(50,70,100,.09);
            opacity: 1
        }

.chat-message.is-mine .chat-bubble footer {
    color: #d8e3ff
}

.chat-image-link img {
    display: block;
    max-width: 100%;
    max-height: 340px;
    margin-top: 7px;
    border-radius: 12px;
    object-fit: cover
}

.chat-file {
    display: flex;
    min-width: 250px;
    align-items: center;
    gap: 10px;
    margin-top: 7px;
    padding: 10px;
    border-radius: 11px;
    background: #f1f4f9;
    color: #263249;
    text-decoration: none
}

    .chat-file > i:first-child {
        font-size: 1.35rem;
        color: #3765d3
    }

    .chat-file > i:last-child {
        margin-left: auto
    }

    .chat-file span {
        display: flex;
        min-width: 0;
        flex-direction: column
    }

    .chat-file strong {
        overflow: hidden;
        font-size: .78rem;
        text-overflow: ellipsis;
        white-space: nowrap
    }

    .chat-file small {
        color: #8a95a7
    }

.chat-message.is-mine .chat-file {
    background: rgba(255,255,255,.14);
    color: #fff
}

    .chat-message.is-mine .chat-file small, .chat-message.is-mine .chat-file > i {
        color: #dfe8ff
    }

.chat-composer {
    padding: 10px 18px 12px;
    border-top: 1px solid #e2e7ef;
    background: #fff
}

.chat-composer-row {
    display: flex;
    align-items: flex-end;
    gap: 10px
}

.chat-composer textarea {
    min-height: 44px;
    max-height: 130px;
    flex: 1;
    resize: none;
    padding: 11px 14px;
    border: 1px solid #dce3ed;
    border-radius: 15px;
    outline: 0;
    font: inherit;
    font-size: .9rem
}

    .chat-composer textarea:focus {
        border-color: #7194e0;
        box-shadow: 0 0 0 3px rgba(55,101,211,.08)
    }

.chat-attach, .chat-send {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border: 0;
    border-radius: 13px;
    background: #edf2fb;
    color: #3765d3;
    cursor: pointer
}

    .chat-attach input {
        display: none
    }

.chat-send {
    background: #3765d3;
    color: #fff
}

    .chat-send:disabled {
        opacity: .45
    }

.chat-composer-hint {
    display: block;
    margin: 5px 54px 0;
    color: #9aa3b2;
    font-size: .62rem
}

.chat-composer-reply {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 0 50px 8px;
    padding: 7px 10px;
    border-radius: 10px;
    background: #f0f4fb;
    color: #536178
}

    .chat-composer-reply span {
        display: flex;
        min-width: 0;
        flex: 1;
        flex-direction: column
    }

    .chat-composer-reply small {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap
    }

    .chat-composer-reply button {
        border: 0;
        background: transparent
    }

.chat-selected-files {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    margin: 0 50px 8px
}

    .chat-selected-files span {
        padding: 5px 8px;
        border-radius: 8px;
        background: #edf2fb;
        color: #536178;
        font-size: .72rem;
        white-space: nowrap
    }

    .chat-selected-files button {
        border: 0;
        background: transparent
    }

.chat-modal-backdrop {
    position: fixed;
    z-index: 1100;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(21,29,45,.5);
    backdrop-filter: blur(3px)
}

.chat-modal {
    display: flex;
    width: min(520px,100%);
    max-height: min(720px,90dvh);
    flex-direction: column;
    overflow: hidden;
    border-radius: 20px;
    background: #fff;
    box-shadow: 0 30px 80px rgba(10,20,40,.25)
}

    .chat-modal > header {
        padding: 20px
    }

        .chat-modal > header button {
            margin-left: auto;
            border: 0;
            background: transparent
        }

    .chat-modal .chat-search {
        margin-bottom: 10px
    }

.chat-user-list {
    min-height: 120px;
    overflow-y: auto;
    padding: 0 12px 16px
}

    .chat-user-list > button, .chat-user-list > label {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px;
        border: 0;
        border-radius: 12px;
        background: #fff;
        text-align: left;
        color: inherit
    }

        .chat-user-list > button:hover, .chat-user-list > label:hover {
            background: #f3f6fb
        }

    .chat-user-list .chat-avatar {
        width: 42px;
        height: 42px
    }

    .chat-user-list button > span:not(.chat-avatar), .chat-user-list label > span:not(.chat-avatar) {
        display: flex;
        min-width: 0;
        flex: 1;
        flex-direction: column
    }

    .chat-user-list small {
        color: #8994a6
    }

    .chat-user-list button > i {
        color: #3765d3
    }

.chat-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 0 20px 14px;
    font-size: .8rem;
    font-weight: 650
}

    .chat-field input {
        height: 44px;
        padding: 0 12px;
        border: 1px solid #dce3ed;
        border-radius: 11px
    }

.chat-modal > footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-top: 1px solid #e6ebf2;
    color: #788397;
    font-size: .8rem
}

.chat-notice {
    position: fixed;
    z-index: 1200;
    top: 18px;
    left: 50%;
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 11px 14px;
    transform: translateX(-50%);
    border-radius: 12px;
    background: #153f31;
    color: #fff;
    box-shadow: 0 10px 30px rgba(0,0,0,.16)
}

    .chat-notice.is-error {
        background: #8f2831
    }

    .chat-notice button {
        border: 0;
        background: transparent;
        color: #fff
    }

.chat-nav-badge {
    display: inline-grid;
    min-width: 19px;
    height: 19px;
    margin-left: auto;
    padding: 0 5px;
    place-items: center;
    border-radius: 20px;
    background: #e2384f;
    color: #fff;
    font-size: .65rem;
    font-weight: 700
}

.chat-conversation-wrapper {
    position: relative;
    display: flex;
    align-items: stretch;
    width: 100%;
    border-radius: 14px;
    transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

    .chat-conversation-wrapper:hover {
        background: rgba(37, 99, 235, 0.06);
    }

    .chat-conversation-wrapper.is-active {
        background: rgba(37, 99, 235, 0.11);
    }

    .chat-conversation-wrapper .chat-conversation {
        flex: 1;
        min-width: 0;
        border: 0;
        background: transparent;
    }

.chat-conversation-delete {
    position: absolute;
    top: 50%;
    right: 8px;
    z-index: 2;
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.92);
    color: #64748b;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-50%) scale(0.92);
    transition: opacity 0.16s ease, visibility 0.16s ease, transform 0.16s ease, color 0.16s ease, background-color 0.16s ease;
}

    .chat-conversation-wrapper:hover .chat-conversation-delete,
    .chat-conversation-delete:focus-visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%) scale(1);
    }

    .chat-conversation-delete:hover {
        color: #dc2626;
        background: #fee2e2;
    }

.chat-conversation-wrapper .chat-conversation-meta {
    padding-right: 34px;
}

@media (hover: none) {
    .chat-conversation-delete {
        opacity: 1;
        visibility: visible;
        transform: translateY(-50%) scale(1);
    }
}

@media(max-width:780px) {
    .chat-page {
        height: calc(100dvh - 20px);
        min-height: 0;
        padding: 8px
    }

    .chat-shell {
        grid-template-columns: 1fr;
        border-radius: 14px
    }

    .chat-sidebar, .chat-window {
        grid-column: 1;
        grid-row: 1
    }

        .chat-sidebar.is-mobile-hidden, .chat-window.is-mobile-hidden {
            display: none
        }

    .chat-back {
        display: grid;
        place-items: center
    }

    .chat-window-header {
        height: 72px;
        padding: 10px
    }

    .chat-sidebar-header {
        height: 76px
    }

    .chat-messages {
        padding: 14px 10px
    }

    .chat-bubble {
        max-width: 86%
    }

    .chat-composer {
        padding: 8px
    }

    .chat-composer-hint {
        display: none
    }

    .chat-composer-reply, .chat-selected-files {
        margin-left: 44px;
        margin-right: 0
    }

    .chat-file {
        min-width: 220px
    }
}

@media(prefers-color-scheme:dark) {
    body.dark .chat-page {
        background: #101522;
        color: #e8edf7
    }

    body.dark .chat-shell, body.dark .chat-sidebar, body.dark .chat-window-header, body.dark .chat-composer, body.dark .chat-modal {
        background: #171d2a;
        border-color: #2a3344
    }

    body.dark .chat-window {
        background: #121823
    }

    body.dark .chat-search, body.dark .chat-bubble, body.dark .chat-user-list > button, body.dark .chat-user-list > label {
        background: #1c2432;
        border-color: #313c50;
        color: #edf2fa
    }

    body.dark .chat-conversation:hover, body.dark .chat-conversation.is-active {
        background: #252f42
    }

    body.dark .chat-composer textarea, body.dark .chat-field input {
        background: #141b27;
        border-color: #344057;
        color: #edf2fa
    }
}