/* =========================
   تنظیمات پایه
========================= */

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


:root {
    color-scheme: dark;

    /* رنگ‌های اصلی */
    --primary: #3390ec;
    --primary-dark: #287bc4;

    /* رنگ‌های محیط */
    --background: #101820;
    --panel: #18232e;
    --border: #293846;

    /* رنگ متن */
    --text: #e6edf3;
    --muted: #91a0af;

    /* حالت‌های تعاملی */
    --hover: #233341;
    --active: #203b52;

    /* پیام‌ها */
    --own-message: #244b3a;
    --other-message: #253442;

    /* ورودی‌ها */
    --input-background: #263746;
    --input-focus: #304556;

    /* اجزای فرعی */
    --scrollbar: #455563;
    --table-header: #202e3a;
    --table-hover: #202e3a;
    --file-background: #202e3a;
    --file-border: #354554;
}

/* تم روشن */
:root[data-theme="light"] {
    color-scheme: light;

    --primary: #3390ec;
    --primary-dark: #287bc4;

    --background: #e8edf3;
    --panel: #ffffff;
    --border: #e5eaf0;

    --text: #202b36;
    --muted: #8493a3;

    --hover: #f1f5f9;
    --active: #e5f2ff;

    --own-message: #d9fdd3;
    --other-message: #ffffff;

    --input-background: #f0f4f8;
    --input-focus: #ffffff;

    --scrollbar: #c7d1dc;
    --table-header: #f3f6fa;
    --table-hover: #f8fafc;
    --file-background: #f7f9fb;
    --file-border: #dedede;
}


body {
    min-height: 100vh;
    font-family: Tahoma, Arial, sans-serif;
    color: var(--text);
    background: var(--background);
    direction: rtl;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

button:disabled,
input:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

button:focus-visible,
input:focus-visible,
a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

[hidden] {
    display: none !important;
}

/* =========================
   قاب اصلی برنامه
========================= */

.app {
    width: min(1500px, 100%);
    height: 100vh;
    min-height: 500px;
    margin: 0 auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* =========================
   هدر بالا
========================= */

.app-header {
    min-height: 68px;
    padding: 12px 18px;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    box-shadow: 0 2px 8px rgb(25 45 70 / 4%);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 13px;
    background: var(--primary);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.brand h1 {
    font-size: 19px;
    font-weight: 700;
}

.brand p {
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
}

.logout-button {
    text-decoration: none;
    color: #ffe4e4;
    background: #7f2929;
    padding: 10px 14px;
    border-radius: 9px;
    font-size: 13px;
    white-space: nowrap;
    transition: background 0.2s;
}

.logout-button:hover {
    background: #a83232;
}

/* =========================
   تقسیم صفحه به دو پنل
========================= */

.messenger-layout {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    overflow: hidden;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 3px 12px rgb(25 45 70 / 5%);
}

/* =========================
   پنل سمت راست: گفتگوها
========================= */

.sidebar {
    grid-column: 2;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: var(--panel);
    border-right: 1px solid var(--border);
    overflow: hidden;
}

.sidebar-header {
    padding: 20px 16px 12px;
}

.sidebar-header h2 {
    font-size: 18px;
}

.sidebar-header p {
    margin-top: 9px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.8;
}

/* =========================
   جست‌وجوی کاربران
========================= */

.user-search {
    padding: 8px 12px 14px;
    border-bottom: 1px solid var(--border);
}

#userSearchForm {
    display: flex;
    align-items: center;
    gap: 6px;
}

#userSearchInput {
    width: 100%;
    min-width: 0;
    height: 40px;
    padding: 0 11px;
    color: var(--text);
    background: var(--input-background);
    border: 1px solid var(--border);
    border-radius: 9px;
    outline: none;
    font-size: 12px;
}

#userSearchInput:focus {
    background: var(--input-focus);
    border-color: var(--primary);
}

#searchUsersButton {
    height: 40px;
    padding: 0 10px;
    flex-shrink: 0;
    color: #ffffff;
    background: var(--primary);
    border: none;
    border-radius: 9px;
    font-size: 12px;
    transition: background 0.2s;
}

#searchUsersButton:hover:not(:disabled) {
    background: var(--primary-dark);
}

.user-search-results {
    display: flex;
    background: var(--input-background);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    flex-direction: column;
    gap: 5px;
    max-height: 180px;
    overflow-y: auto;
}

.user-search-results:not(:empty) {
    margin-top: 8px;
}

.user-search-results button {
    background: var(--panel);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.user-search-results button:hover {
    background: var(--hover);
}

/* =========================
   فهرست گفتگوها
========================= */

.conversation-list {
    flex: 1;
    min-height: 0;
    padding: 8px;
    overflow-y: auto;
    background: var(--panel);
    color: var(--text);
}

.conversation-item {
    width: 100%;
    min-height: 70px;
    padding: 10px;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 11px;
    text-align: right;
    color: var(--text);
    background: transparent;
    border: none;
    border-radius: 11px;
    transition: background 0.15s;
}

.conversation-item:hover {
    background: var(--hover);
}

.conversation-item.active {
    background: var(--active);
}

.conversation-avatar {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    border-radius: 50%;
    color: #ffffff;
    background: #7c83db;
    font-size: 14px;
    font-weight: bold;
}

.group-avatar {
    background: var(--primary);
}

.conversation-details {
    min-width: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.conversation-details strong {
    overflow: hidden;
    font-size: 13px;
    font-weight: 700;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversation-details small {
    overflow: hidden;
    color: var(--muted);
    font-size: 11px;
    line-height: 1.6;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-footer {
    padding: 13px 10px;
    text-align: center;
    color: var(--muted);
    border-top: 1px solid var(--border);
    font-size: 11px;
}

/* =========================
   پنل سمت چپ: چت
========================= */

.chat-panel {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--background);
}

.chat-panel-header {
    min-height: 72px;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--panel);
    border-bottom: 1px solid var(--border);
}

.chat-heading {
    min-width: 0;
}

.chat-heading h2 {
    overflow: hidden;
    font-size: 16px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-heading p {
    margin-top: 6px;
    color: var(--muted);
    font-size: 12px;
}

.chat-mode-badge {
    flex-shrink: 0;
    padding: 6px 10px;
    color: #287bc4;
    background: #e5f2ff;
    border-radius: 20px;
    font-size: 11px;
}

/* =========================
   فضای پیام‌ها
========================= */

.messages {
    flex: 1;
    min-height: 0;
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
    background-color: var(--background);
    background-image: radial-gradient(
        rgb(120 145 170 / 10%) 0.7px,
        transparent 0.7px
    );
    background-size: 16px 16px;
}

/* =========================
   حباب پیام‌ها
========================= */

.message {
    width: fit-content;
    max-width: min(75%, 560px);
    padding: 10px 13px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-radius: 12px;
    box-shadow: 0 1px 2px rgb(20 40 60 / 8%);
    overflow-wrap: anywhere;
    line-height: 1.8;
    font-size: 13px;
}

.message strong {
    color: #3285ca;
    font-size: 11px;
}

.message span {
    white-space: pre-wrap;
}

.message-own {
    align-self: flex-start;
    background: var(--own-message);
    border-bottom-left-radius: 4px;
}

.message-other {
    align-self: flex-end;
    background: var(--other-message);
    border-bottom-right-radius: 4px;
}

/* =========================
   کادر ارسال پیام
========================= */

.message-form {
    padding: 14px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--panel);
    border-top: 1px solid var(--border);
}

#messageInput {
    flex: 1;
    min-width: 0;
    height: 46px;
    padding: 0 15px;
    color: var(--text);
    background: var(--input-background);
    border: 1px solid transparent;
    border-radius: 12px;
    outline: none;
    font-size: 13px;
}

#messageInput:focus {
    background: var(--input-focus);
    border-color: var(--primary);
}

#sendButton {
    min-width: 86px;
    height: 46px;
    padding: 0 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #ffffff;
    background: var(--primary);
    border: none;
    border-radius: 12px;
    font-size: 13px;
    transition: background 0.2s;
}

#sendButton:hover:not(:disabled) {
    background: var(--primary-dark);
}

/* =========================
   اسکرول‌بار
========================= */

.conversation-list,
.messages,
.user-search-results {
    scrollbar-width: thin;
    scrollbar-color: #c7d1dc transparent;
}

.conversation-list::-webkit-scrollbar,
.messages::-webkit-scrollbar,
.user-search-results::-webkit-scrollbar {
    width: 6px;
}

.conversation-list::-webkit-scrollbar-thumb,
.messages::-webkit-scrollbar-thumb,
.user-search-results::-webkit-scrollbar-thumb {
    background: #c7d1dc;
    border-radius: 10px;
}

/* =========================
   صفحه‌های کوچک
========================= */


/* =========================
   نمایش موبایل
========================= */

@media (max-width: 760px) {
    .app {
        width: 100%;
        height: 100dvh;
        min-height: 0;
        padding: 0;
        gap: 0;
    }

    .app-header {
        flex-shrink: 0;
        min-height: 58px;
        padding: 8px 12px;
        border-radius: 0;
        border: none;
        border-bottom: 1px solid var(--border);
        box-shadow: none;
    }

    .brand {
        gap: 8px;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
    }

    .brand h1 {
        font-size: 15px;
    }

    .brand p {
        font-size: 10px;
    }

    .logout-button {
        padding: 8px 10px;
        font-size: 11px;
    }

    .messenger-layout {
        flex: 1;
        min-height: 0;
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        border: none;
        border-radius: 0;
        box-shadow: none;
    }

    .sidebar {
        border-right: none;
    }

    .sidebar-header {
        padding: 16px 12px 10px;
        background: var(--panel);
        color: var(--text);
    }

    .sidebar-header h2 {
        font-size: 16px;
    }

    .sidebar-header p {
        font-size: 11px;
    }

    .user-search {
        padding: 8px 10px 12px;
        background: var(--panel);
        border-bottom: 1px solid var(--border);
        color: var(--text);
        background: var(--input-background);

    }

    #userSearchForm {
        display: flex;
        flex-direction: row;
        gap: 6px;
    }

    #userSearchInput {
        min-width: 0;
        width: 100%;
        height: 40px;
        font-size: 12px;
    }

    #searchUsersButton {
        width: auto;
        height: 40px;
        padding: 0 9px;
        font-size: 11px;
    }

    .conversation-list {
        padding: 5px;
    }

    .conversation-item {
        min-height: 62px;
        padding: 7px;
        gap: 8px;
    }

    .conversation-avatar {
        width: 38px;
        height: 38px;
        font-size: 12px;
    }

    .conversation-details {
        gap: 5px;
    }

    .conversation-details strong {
        font-size: 12px;
    }

    .conversation-details small {
        font-size: 10px;
    }

    .sidebar-footer {
        background: var(--panel);
        padding: 10px 5px;
        font-size: 10px;
    }

    .chat-panel-header {
        min-height: 62px;
        padding: 10px 12px;
    }

    .chat-heading h2 {
        font-size: 14px;
    }

    .chat-heading p {
        font-size: 10px;
    }

    .chat-mode-badge {
        padding: 5px 7px;
        font-size: 10px;
    }

    .messages {
        padding: 12px 8px;
        gap: 9px;
    }

    .message {
        max-width: 92%;
        padding: 8px 10px;
        font-size: 12px;
    }

    .message-form {
        padding: 8px;
        gap: 6px;
    }

    #messageInput {
        height: 42px;
        padding: 0 10px;
        font-size: 12px;
    }

    #sendButton {
        min-width: 58px;
        height: 42px;
        padding: 0 8px;
        font-size: 11px;
    }
}

/* موبایل باریک */
@media (max-width: 480px) {
    .brand h1 {
        font-size: 14px;
    }

    .brand p {
        font-size: 9px;
    }

    .logout-button {
        padding: 7px;
        font-size: 10px;
    }

    .messenger-layout {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    }

    .sidebar-header {
        padding: 13px 8px 8px;
        background: var(--panel);
        color: var(--text);
    }

    .user-search {
        padding: 6px;
    }

    #userSearchForm {
        flex-direction: column;
    }

    #userSearchInput,
    #searchUsersButton {
        width: 100%;
    }

    .conversation-item {
        gap: 6px;
        padding: 6px 4px;
    }

    .conversation-avatar {
        width: 32px;
        height: 32px;
        font-size: 10px;
    }

    .conversation-details strong {
        font-size: 11px;
    }

    .conversation-details small {
        font-size: 9px;
    }

    .chat-panel-header {
        padding: 8px;
    }

    .chat-mode-badge {
        display: none;
    }

    .message {
        max-width: 96%;
        font-size: 11px;
    }

    #sendButton {
        min-width: 48px;
    }
}

/* =========================
   صفحات ورود و ثبت‌نام
========================= */

.auth-container {
    width: min(420px, calc(100% - 32px));
    margin: 60px auto;
    padding: 30px;
    background: var(--panel);
    border: 1px solid var(--border, #e5eaf0);
    border-radius: 16px;
    box-shadow: 0 8px 30px rgb(25 45 70 / 8%);
}

.auth-container h1,
.auth-container h2 {
    margin-bottom: 12px;
    text-align: center;
    color: var(--text, #202b36);
}

.auth-container p {
    margin-bottom: 18px;
    color: var(--muted, #8493a3);
    text-align: center;
    line-height: 1.8;
    font-size: 13px;
}

.auth-container form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-container label {
    color: var(--text, #202b36);
    font-size: 13px;
}

.auth-container input,
.auth-container select,
.auth-container textarea {
    width: 100%;
    min-height: 42px;
    padding: 10px 12px;
    color: var(--text, #202b36);
    background: var(--input-background);
    border: 1px solid var(--border);
    border-radius: 9px;
    outline: none;
}

.auth-container input:focus,
.auth-container select:focus,
.auth-container textarea:focus {
    border-color: var(--primary, #3390ec);
    background: var(--input-focus);
}

.auth-container button {
    min-height: 44px;
    padding: 10px 14px;
    color: #ffffff;
    background: var(--primary, #3390ec);
    border: none;
    border-radius: 9px;
    font-weight: bold;
}

.auth-container button:hover:not(:disabled) {
    background: var(--primary-dark, #287bc4);
}

.auth-container a {
    color: var(--primary, #3390ec);
    text-decoration: none;
}

.auth-container a:hover {
    text-decoration: underline;
}

.auth-container .error,
.auth-container .error-message {
    color: #dc2626;
}

.auth-container .success,
.auth-container .success-message {
    color: #15803d;
}

/* =========================
   پنل مدیریت
========================= */

.admin-container {
    width: min(1200px, calc(100% - 32px));
    margin: 24px auto;
    padding: 24px;
    background: #ffffff;
    border: 1px solid var(--border, #e5eaf0);
    border-radius: 14px;
    box-shadow: 0 4px 20px rgb(25 45 70 / 5%);
    overflow-x: auto;
}

.admin-container h1,
.admin-container h2,
.admin-container h3 {
    margin-bottom: 16px;
    color: var(--text, #202b36);
}

.admin-container p {
    line-height: 1.8;
}

.admin-container table {
    width: 100%;
    margin-top: 16px;
    border-collapse: collapse;
    text-align: right;
}

.admin-container th,
.admin-container td {
    padding: 12px;
    border-bottom: 1px solid var(--border, #e5eaf0);
    font-size: 13px;
    vertical-align: middle;
}

.admin-container th {
    background: #f3f6fa;
    font-weight: bold;
}

.admin-container tr:hover td {
    background: #f8fafc;
}

.admin-container input,
.admin-container select,
.admin-container textarea {
    max-width: 100%;
    padding: 9px 11px;
    border: 1px solid #dce3eb;
    border-radius: 8px;
    background: #ffffff;
}

.admin-container button {
    padding: 9px 13px;
    border: none;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary, #3390ec);
}

.admin-container button:hover {
    background: var(--primary-dark, #287bc4);
}

.admin-container a {
    color: var(--primary, #3390ec);
    text-decoration: none;
}

.admin-container a:hover {
    text-decoration: underline;
}

/* صفحه‌های ورود در موبایل */
@media (max-width: 480px) {
    .auth-container {
        margin: 24px auto;
        padding: 22px 18px;
    }

    .admin-container {
        width: calc(100% - 16px);
        margin: 8px auto;
        padding: 14px;
    }

    .admin-container th,
    .admin-container td {
        padding: 8px;
        font-size: 12px;
    }
}

/* اصلاح جدول کاربران در پنل مدیریت دسکتاپ */

@media (min-width: 761px) {
    .auth-container:has(#usersList) {
        width: calc(100% - 48px);
        max-width: 1400px;
    }

    #usersList {
        width: 100%;
        overflow-x: auto;
    }

    #usersList table {
        width: 100%;
        min-width: 850px;
        table-layout: auto;
    }

    #usersList th,
    #usersList td {
        padding: 12px 16px;
        white-space: nowrap;
    }

    #usersList td:last-child {
        min-width: 210px;
    }

    #usersList td button {
        display: inline-block;
        width: auto;
        min-width: 85px;
        margin: 3px;
        padding: 9px 12px;
        white-space: nowrap;
    }
}

/* محدود کردن عرض فرم ساخت کاربر در دسکتاپ */

@media (min-width: 761px) {
    .auth-container:has(#usersList) > form {
        max-width: 450px;
    }

    .auth-container:has(#usersList) > form input,
    .auth-container:has(#usersList) > form button {
        width: 100%;
    }
}

/* =========================
   منوی کشویی گفتگوها در موبایل
========================= */

.mobile-menu-button,
.sidebar-backdrop {
    display: none;
}

@media (max-width: 760px) {
    .messenger-layout {
        position: relative;
        display: block;
        overflow: hidden;
        isolation: isolate;
    }

    /* چت تمام فضای موبایل را می‌گیرد */
    .chat-panel {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        z-index: 1;
    }

    /* دکمه منوی گفتگوها */
    .mobile-menu-button {
        display: grid;
        place-items: center;
        flex-shrink: 0;
        width: 40px;
        height: 40px;
        color: var(--text);
        background: var(--input-background);
        border: 1px solid var(--border);
        border-radius: 10px;
        font-size: 21px;
        cursor: pointer;
    }

    .mobile-menu-button:active {
        background: var(--active);
    }

    .chat-panel-header {
        justify-content: flex-start;
        gap: 10px;
    }

    .chat-heading {
        flex: 1;
    }

    /* پنل کشویی سمت راست */
    .sidebar {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(340px, 88%);
        height: 100%;
        z-index: 3;
        background: #ffffff;
        border: none;
        box-shadow: -8px 0 25px rgb(20 40 60 / 12%);
        transform: translateX(105%);
        visibility: hidden;
        transition:
            transform 0.25s ease,
            visibility 0.25s ease;
    }

    /* وضعیت باز منو */
    .messenger-layout.sidebar-open .sidebar {
        transform: translateX(0);
        visibility: visible;
    }

    /* لایه تاریک پشت منو */
    .sidebar-backdrop {
        position: absolute;
        inset: 0;
        z-index: 2;
        display: block;
        background: rgb(15 23 42 / 40%);
        opacity: 0;
        visibility: hidden;
        transition:
            opacity 0.25s ease,
            visibility 0.25s ease;
    }

    .messenger-layout.sidebar-open .sidebar-backdrop {
        opacity: 1;
        visibility: visible;
    }

    .sidebar-header {
        padding-top: 18px;
    }

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

@media (prefers-reduced-motion: reduce) {
    .sidebar,
    .sidebar-backdrop {
        transition: none !important;
    }
}
.message-status {
    display: inline-block;
    margin-right: 6px;
    font-size: 12px;
    font-weight: 600;
    opacity: 0.8;
    direction: ltr;
    user-select: none;
}

.message-own .message-status {
    align-self: flex-end;
}
@keyframes unread-message-blink {
    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

@keyframes unread-message-blink {
    0%,
    100% {
        opacity: 1;
        color: #2196f3;
    }

    50% {
        opacity: 0.4;
        color: #64b5f6;
    }
}

.conversation-details small.conversation-preview-unread {
    animation: unread-message-blink 1s ease-in-out infinite;
    font-weight: 700;
}

@media (prefers-reduced-motion: reduce) {
    .conversation-details small.conversation-preview-unread {
        animation: none;
        color: #2196f3;
        font-weight: 700;
    }
}

.file-button {
    width: 44px;
    height: 44px;
    min-width: 44px;

    display: flex;
    align-items: center;
    justify-content: center;

    border: 1px solid #dedede;
    border-radius: 12px;

    background: #f7f7f7;
    color: #666;

    cursor: pointer;
    transition: all 0.2s ease;
}

.file-button:hover {
    background: #eaeaea;
    color: #222;
    border-color: #c5c5c5;
}

.file-button:active {
    transform: scale(0.94);
}

.file-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    transform: none;
}
/* =========================
   کارت فایل‌ها - Painhub
========================= */

.file-message {
    width: min(100%, 340px);
    min-width: 240px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 9px;
    background: rgb(255 255 255 / 55%);
    border: 1px solid rgb(100 130 150 / 15%);
    border-radius: 12px;
}

.file-message .file-name {
    font-size: 12px;
    font-weight: 700;
    overflow-wrap: anywhere;
}

.file-message .file-size {
    color: var(--muted);
    font-size: 11px;
}

.file-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 6px 12px;
    color: #fff;
    background: var(--primary);
    border-radius: 8px;
    text-decoration: none;
    font-size: 12px;
    transition: background 0.2s;
}

.file-download:hover {
    background: var(--primary-dark);
}

/* بخش پیشرفت انتقال */

.file-transfer {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.file-transfer-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    color: var(--muted);
    font-size: 11px;
}

.file-progress-track {
    width: 100%;
    height: 5px;
    overflow: hidden;
    background: #dce5ed;
    border-radius: 10px;
    direction: ltr;
}

.file-progress-bar {
    width: 0%;
    height: 100%;
    background: var(--primary);
    border-radius: inherit;
    transition: width 0.15s linear;
}

.file-transfer-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.file-cancel-button {
    padding: 5px 10px;
    color: #dc4545;
    background: transparent;
    border: 1px solid #efbaba;
    border-radius: 7px;
    font-size: 11px;
}

.file-cancel-button:hover {
    background: #fff0f0;
}

.file-transfer-complete {
    color: #16834a;
    font-size: 11px;
    font-weight: 700;
}

@media (max-width: 480px) {
    .file-message {
        min-width: 210px;
        padding: 10px;
    }
}

/* پیش‌نمایش تصاویر در پیام */
.file-image-preview {
    display: block;
    width: 100%;
    max-width: 280px;
    max-height: 220px;
    object-fit: contain;
    margin: 10px 0;
    border-radius: 10px;
    cursor: zoom-in;
    background: #111;
}

/* پخش ویدئو در پیام */
.file-video-preview {
    display: block;
    width: 100%;
    max-width: 320px;
    max-height: 240px;
    margin: 10px 0;
    border-radius: 10px;
    background: #000;
}

/* پس‌زمینه نمایشگر تصویر */
.image-viewer-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 50px 20px 20px;
    background: rgba(0, 0, 0, 0.92);
}

/* تصویر بزرگ */
.image-viewer-overlay img {
    max-width: 95%;
    max-height: 85%;
    object-fit: contain;
    border-radius: 8px;
}

/* نام فایل */
.image-viewer-title {
    color: #fff;
    font-size: 14px;
    text-align: center;
    direction: rtl;
}

/* دکمه بستن */
.image-viewer-close {
    position: absolute;
    top: 15px;
    right: 20px;
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 30px;
    cursor: pointer;
}

.image-viewer-close:hover {
    background: rgba(255, 255, 255, 0.3);
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle-button {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--input-background);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 19px;
    cursor: pointer;
    transition: 0.2s;
}

.theme-toggle-button:hover {
    background: var(--hover);
}