/* Reset CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}

:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #ea4335;
    --light-color: #f8f9fa;
    --dark-color: #202124;
    --gray-color: #5f6368;
    --light-gray: #dadce0;
    --hover-color: #e8f0fe;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    background-color: #f5f5f5;
    color: var(--dark-color);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--light-color);
}

/* Screens */
.screen {
    display: none;
    width: 100%;
    height: 100%;
}

.screen.active {
    display: flex;
}

/* Login Screen */
#login-screen {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #4285f4, #34a853);
}

.login-container {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 40px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: var(--shadow);
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
}

.logo img {
    width: 80px;
    height: 80px;
    margin-bottom: 15px;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 28px;
}

.welcome-text {
    margin-bottom: 30px;
    color: var(--gray-color);
}

.login-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    transition: var(--transition);
}

.login-button i {
    margin-right: 10px;
}

.login-button:hover {
    background-color: #3367d6;
    transform: translateY(-2px);
}

/* Main Screen */
#main-screen {
    flex-direction: row;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 320px;
    height: 100%;
    background-color: white;
    border-right: 1px solid var(--light-gray);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-header {
    padding: 15px;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-profile {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 10px;
    cursor: pointer;
}

.user-info {
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.user-info h3 {
    font-size: 16px;
    font-weight: 500;
}

.user-info p {
    font-size: 12px;
    color: var(--secondary-color);
}

/* CSS cho phần thay đổi ảnh nền và ảnh đại diện */
.chat-settings {
    margin-top: 15px;
    border-top: 1px solid var(--light-gray);
    padding-top: 15px;
}

.color-picker-container {
    margin: 10px 0;
}

.color-picker-container input[type="color"] {
    width: 100%;
    height: 40px;
    border: 1px solid #ddd;
    border-radius: 5px;
    cursor: pointer;
}

.bg-upload-container, .avatar-upload-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 15px 0;
}

.bg-preview, .avatar-preview {
    width: 100%;
    max-width: 300px;
    height: 150px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-bottom: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f5f5f5;
}

.avatar-preview {
    height: 200px;
    width: 200px;
    border-radius: 50%;
}

.bg-preview img, .avatar-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
}

.bg-upload-button, .avatar-upload-button {
    margin-top: 10px;
}

.sidebar-actions {
    display: flex;
}

.sidebar-actions button {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--gray-color);
    margin-left: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.sidebar-actions button:hover {
    color: var(--primary-color);
}

.search-container {
    padding: 15px;
}

.search-box {
    display: flex;
    align-items: center;
    background-color: var(--light-color);
    border-radius: 50px;
    padding: 8px 15px;
}

.search-box i {
    color: var(--gray-color);
    margin-right: 10px;
}

.search-box input {
    border: none;
    background: none;
    outline: none;
    width: 100%;
    font-size: 14px;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--light-gray);
}

.tab-button {
    flex: 1;
    background: none;
    border: none;
    padding: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.tab-button.active {
    color: var(--primary-color);
}

.tab-button.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
}

.tab-content {
    flex: 1;
    overflow-y: auto;
}

.tab-pane {
    display: none;
    height: 100%;
    overflow-y: auto;
}

.tab-pane.active {
    display: block;
}

/* Chat List */
.chat-list, .user-list {
    padding: 10px 0;
}

.chat-item, .user-item {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--light-gray);
    position: relative;
}

/* Đánh dấu người dùng hiện tại */
.user-item.current-user {
    background-color: rgba(66, 133, 244, 0.1);
}

.user-item.current-user::after {
    content: '(Bạn)';
    font-size: 12px;
    color: var(--primary-color);
    margin-left: 5px;
}

.user-actions {
    margin-left: auto;
    display: none;
}

.user-item:hover .user-actions {
    display: flex;
}

.chat-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.chat-button:hover {
    background-color: #3367d6;
}

.chat-item:hover, .user-item:hover {
    background-color: var(--hover-color);
}

.chat-item.active {
    background-color: var(--hover-color);
    border-left: 3px solid var(--primary-color);
}

.chat-avatar, .user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 15px;
    position: relative;
}

.chat-avatar img, .user-avatar img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

/* Điều chỉnh kích thước avatar mặc định trong user-avatar */
.user-avatar img[src*="default-avatar.svg"] {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

/* Điều chỉnh kích thước avatar mặc định trong chat-avatar */
.chat-avatar img[src*="default-avatar.svg"] {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

/* Đặc biệt cho avatar nhóm cộng đồng trong danh sách chat */
.chat-item img[src*="co.png"] {
    object-fit: contain;
    background-color: #f0f2f5;
}

/* Điều chỉnh kích thước biểu tượng nhóm cộng đồng */
.chat-item img[src*="co.png"] {
    width: 30px;
    height: 30px;
    object-fit: contain;
}

/* Điều chỉnh kích thước avatar mặc định */
.chat-item img[src*="default-avatar.svg"] {
    width: 35px;
    height: 35px;
    object-fit: contain;
}

.online-indicator {
    width: 12px;
    height: 12px;
    background-color: var(--secondary-color);
    border-radius: 50%;
    position: absolute;
    bottom: 0;
    right: 0;
    border: 2px solid white;
}

.chat-details, .user-details {
    flex: 1;
}

.chat-name, .user-name {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 5px;
    display: flex;
    justify-content: space-between;
}

.chat-time {
    font-size: 12px;
    color: var(--gray-color);
}

.chat-last-message, .user-status {
    font-size: 13px;
    color: var(--gray-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.unread-badge {
    background-color: var(--primary-color);
    color: white;
    font-size: 12px;
    font-weight: bold;
    min-width: 20px;
    height: 20px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 6px;
    margin-left: 10px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: #f5f5f5;
    position: relative;
    background-size: cover;
    background-position: center;
}

.empty-chat-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--gray-color);
    text-align: center;
    padding: 20px;
}

.empty-chat-placeholder img {
    width: 150px;
    height: 150px;
    margin-bottom: 20px;
    opacity: 0.7;
}

.chat-container {
    display: none;
    flex-direction: column;
    height: 100%;
}

.chat-header {
    padding: 15px;
    background-color: white;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-info {
    display: flex;
    align-items: center;
}

.chat-info img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

/* Đặc biệt cho avatar nhóm cộng đồng */
.chat-info img[src*="co.png"] {
    object-fit: contain;
    background-color: #f0f2f5;
}

/* Điều chỉnh kích thước biểu tượng nhóm cộng đồng trong chat-header */
.chat-info img[src*="co.png"] {
    width: 30px;
    height: 30px;
    object-fit: contain;
}

/* Điều chỉnh kích thước avatar mặc định trong chat-header */
.chat-info img[src*="default-avatar.svg"] {
    width: 35px;
    height: 35px;
    object-fit: contain;
}

.chat-actions button {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

.chat-actions button:hover {
    color: var(--primary-color);
}

.messages-container {
    flex: 1;
    padding: 15px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.message {
    max-width: 70%;
    margin-bottom: 8px; /* Giảm khoảng cách giữa các tin nhắn */
    display: flex;
    align-items: flex-end;
}

.message-content {
    display: flex;
    flex-direction: column;
}

.message-avatar, .message-avatar-placeholder {
    width: 30px;
    height: 30px;
    margin-right: 8px;
}

.message-avatar {
    cursor: pointer;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

/* Điều chỉnh kích thước avatar mặc định trong tin nhắn */
.message-avatar img[src*="default-avatar.svg"] {
    width: 25px;
    height: 25px;
    object-fit: contain;
}

.message.outgoing {
    align-self: flex-end;
}

.message.incoming {
    align-self: flex-start;
    margin-left: 5px;
}

.message-bubble {
    padding: 10px 15px;
    border-radius: 18px;
    position: relative;
    word-wrap: break-word;
}

.message.outgoing .message-bubble {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 5px;
}

.message.incoming .message-bubble {
    background-color: white;
    border-bottom-left-radius: 5px;
}

.message-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 12px;
    margin-top: 5px;
    cursor: pointer;
}

.message-info {
    display: flex;
    align-items: center;
    margin-top: 5px;
    font-size: 12px;
    color: var(--gray-color);
}

.message.outgoing .message-info {
    justify-content: flex-end;
}

.message-time {
    margin-right: 2px; /* Giảm khoảng cách giữa thời gian và icon tích */
    display: inline-block; /* Hiển thị thời gian tin nhắn */
}

.message-status i {
    font-size: 10px; /* Giảm kích thước icon tích */
    opacity: 0.7; /* Làm mờ icon tích */
    margin-left: -3px; /* Giảm khoảng cách giữa thời gian và icon tích */
}

.message-sender {
    font-size: 12px;
    color: var(--gray-color);
    margin-bottom: 3px;
}

.message-input-container {
    padding: 15px;
    background-color: white;
    border-top: 1px solid var(--light-gray);
    display: flex;
    align-items: center;
}

.message-input-container button {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
    padding: 0 15px;
}

.message-input-container button:hover {
    color: var(--primary-color);
}

.message-input {
    flex: 1;
    background-color: var(--light-color);
    border-radius: 50px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    margin: 0 10px;
}

.message-input input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: 14px;
}

/* Info Sidebar */
.info-sidebar {
    width: 0;
    height: 100%;
    background-color: white;
    border-left: 1px solid var(--light-gray);
    transition: var(--transition);
    overflow: hidden;
}

.info-sidebar.active {
    width: 300px;
}

.info-header {
    padding: 15px;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.info-header button {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

.info-header button:hover {
    color: var(--primary-color);
}

.info-content {
    padding: 15px;
    overflow-y: auto;
    height: calc(100% - 56px);
}

.info-section {
    margin-bottom: 20px;
}

.info-section h4 {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 10px;
    text-transform: uppercase;
}

/* Điều chỉnh kích thước avatar mặc định trong info-item */
.info-item img[src*="default-avatar.svg"] {
    width: 60px !important;
    height: 60px !important;
    object-fit: contain !important;
}

.member-item {
    display: flex;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--light-gray);
}

.member-item img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

.member-info h4 {
    font-size: 14px;
    margin-bottom: 3px;
    text-transform: none;
}

.member-info p {
    font-size: 12px;
    color: var(--gray-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

/* User Profile */
.user-profile {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.user-profile-avatar {
    width: 120px;
    height: 120px;
    margin-bottom: 20px;
    position: relative;
}

.user-profile-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

/* Điều chỉnh kích thước avatar mặc định trong user-profile */
.user-profile-avatar img[src*="default-avatar.svg"] {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

.user-profile-info {
    text-align: center;
    width: 100%;
}

.user-profile-info h2 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

.user-profile-info p {
    margin-bottom: 10px;
    font-size: 14px;
}

/* Avatar container và nút đổi avatar */
.avatar-container {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 10px auto;
}

.change-avatar-button {
    position: absolute;
    bottom: 0;
    right: 0;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.change-avatar-button:hover {
    background-color: #3367d6;
    transform: scale(1.1);
}

.change-avatar-button i {
    font-size: 14px;
}

.change-avatar-button span {
    display: none;
}

/* Nút quản lý nhóm */
.group-admin-buttons {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 15px;
}

.group-admin-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px 12px;
    border-radius: 5px;
    border: none;
    background-color: var(--primary-color);
    color: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.group-admin-button:hover {
    background-color: #3367d6;
}

.group-admin-button.danger {
    background-color: #e53935;
}

.group-admin-button.danger:hover {
    background-color: #c62828;
}

.group-admin-button i {
    font-size: 14px;
}

.online-status {
    color: var(--online-color);
    font-weight: bold;
}

.offline-status {
    color: var(--text-light);
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: white;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

.modal-header {
    padding: 15px;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header button {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
}

.modal-header button:hover {

/* Chọn icon nhóm */
.group-icon-selection {
    display: flex;
    flex-wrap: wrap; /* Cho phép các icon xuống dòng khi không đủ không gian */
    gap: 15px;
    margin-top: 10px;
}

.group-icon-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    width: calc(25% - 15px); /* Đảm bảo mỗi hàng có 4 icon, trừ đi khoảng cách */
    min-width: 80px; /* Đảm bảo kích thước tối thiểu */
    box-sizing: border-box; /* Đảm bảo padding và border nằm trong width */
}

.group-icon-option.selected {
    border-color: var(--primary-color);
    background-color: rgba(66, 133, 244, 0.1);
}

.group-icon-option img {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 5px;
    background-color: #f5f5f5; /* Thêm màu nền cho icon */
    padding: 3px; /* Thêm padding cho icon */
}

.upload-placeholder {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 5px;
    padding: 3px;
}

.upload-placeholder i {
    font-size: 20px;
    color: var(--primary-color);
}

.custom-upload {
    position: relative;
    cursor: pointer;
}

.custom-upload:hover .upload-placeholder {
    background-color: #e0e0e0;
}

.group-icon-option span {
    font-size: 12px;
    text-align: center;
}
    color: var(--primary-color);
}

.modal-body {
    padding: 15px;
}

.modal-footer {
    padding: 15px;
    border-top: 1px solid var(--light-gray);
    display: flex;
    justify-content: flex-end;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--light-gray);
    border-radius: 5px;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus {
    border-color: var(--primary-color);
}

.user-selection, .user-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--light-gray);
    border-radius: 5px;
}

.user-checkbox {
    display: flex;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--light-gray);
    cursor: pointer;
}

.user-checkbox:last-child {
    border-bottom: none;
}

.user-checkbox input {
    margin-right: 10px;
}

.user-item {
    padding: 10px;
    border-bottom: 1px solid var(--light-gray);
}

.user-item:last-child {
    border-bottom: none;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-info img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.user-info h4 {
    margin: 0;
    font-size: 14px;
}

.user-info p {
    margin: 5px 0 0;
    font-size: 12px;
    color: var(--text-light);
}

.text-danger {
    color: #e53935;
}

.user-checkbox img {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 10px;
}

/* Điều chỉnh kích thước avatar mặc định trong user-checkbox */
.user-checkbox img[src*="default-avatar.svg"] {
    width: 25px;
    height: 25px;
    object-fit: contain;
}

.primary-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.primary-button:hover {
    background-color: #3367d6;
}

/* Switch Toggle */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    margin-right: 10px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Checkbox Group */
.checkbox-group {
    margin-bottom: 10px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    font-weight: normal;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-right: 10px;
}

/* Note */
.note {
    background-color: #f8f9fa;
    border-left: 4px solid var(--primary-color);
    padding: 10px;
    margin-top: 15px;
    border-radius: 4px;
}

.note p {
    margin: 0;
    font-size: 13px;
    color: #666;
}

.note i {
    color: var(--primary-color);
    margin-right: 5px;
}

/* Emoji Picker */
.emoji-picker {
    display: none;
    position: absolute;
    bottom: 80px;
    right: 20px;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    width: 300px;
    height: 200px;
    overflow-y: auto;
    z-index: 100;
}

.emoji-picker.active {
    display: block;
}

.emoji-container {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    padding: 10px;
}

.emoji-item {
    font-size: 20px;
    padding: 5px;
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
}

.emoji-item:hover {
    background-color: var(--hover-color);
    border-radius: 5px;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.empty-messages, .empty-user-list {
    text-align: center;
    color: var(--gray-color);
    padding: 20px;
    font-style: italic;
}

.toast {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 15px;
    margin-top: 10px;
    display: flex;
    align-items: center;
    min-width: 300px;
    max-width: 400px;
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
}

.toast.success {
    border-left: 4px solid var(--secondary-color);
}

.toast.error {
    border-left: 4px solid var(--accent-color);
}

.toast.info {
    border-left: 4px solid var(--primary-color);
}

.toast-icon {
    margin-right: 15px;
    font-size: 20px;
}

.toast.success .toast-icon {
    color: var(--secondary-color);
}

.toast.error .toast-icon {
    color: var(--accent-color);
}

.toast.info .toast-icon {
    color: var(--primary-color);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 500;
    margin-bottom: 5px;
}

.toast-message {
    font-size: 14px;
    color: var(--gray-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        position: absolute;
        left: -320px;
        z-index: 10;
        height: 100%;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .chat-area {
        width: 100%;
    }
    
    .info-sidebar.active {
        position: absolute;
        right: 0;
        z-index: 10;
        height: 100%;
    }
    
    .chat-header {
        padding: 10px;
    }
    
    .chat-header .menu-toggle {
        display: block;
    }
    
    .message {
        max-width: 85%;
    }
    
    .modal-content {
        width: 95%;
    }
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--gray-color);
    cursor: pointer;
    margin-right: 10px;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .chat-header .chat-info {
        margin-left: 10px;
    }
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 30px;
    height: 30px;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

/* Image Preview */
.image-preview {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.image-preview.active {
    display: flex;
}

.image-preview img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.image-preview-close {
    position: absolute;
    top: 20px;
    right: 20px;
    color: white;
    font-size: 30px;
    cursor: pointer;
    background: none;
    border: none;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: var(--gray-color);
    font-size: 12px;
}

.typing-dots {
    display: flex;
    margin-left: 5px;
}

.typing-dot {
    width: 6px;
    height: 6px;
    background-color: var(--gray-color);
    border-radius: 50%;
    margin: 0 2px;
    animation: typingAnimation 1.5s infinite ease-in-out;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}
.message-bubble[data-linkified="true"] {
  word-break: break-all;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

@keyframes typingAnimation {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
    100% {
        transform: translateY(0);
    }
}

/* Date Divider */
.date-divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    color: var(--gray-color);
    font-size: 12px;
}

.date-divider::before,
.date-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--light-gray);
}

.date-divider::before {
    margin-right: 10px;
}

.date-divider::after {
    margin-left: 10px;
}

/* Mobile Optimizations */
@media (max-width: 480px) {
    .login-container {
        padding: 30px 20px;
    }
    
    .message-input-container {
        padding: 10px;
        padding-bottom: 60px; /* Tăng padding-bottom để tránh bị thanh điều hướng của điện thoại che khuất */
    }
    
    .message-input {
        margin: 0 5px;
    }
    
    .message-input-container button {
        padding: 0 10px;
    }
    
    .chat-header {
        padding: 10px;
    }
    
    .chat-info img {
        width: 35px;
        height: 35px;
        margin-right: 10px;
    }
    
    .messages-container {
        padding: 10px;
        padding-bottom: 30px; /* Tăng padding-bottom để cân bằng với padding-bottom của message-input-container */
    }
    
    .message {
        max-width: 90%;
    }
    
    /* Hiển thị nút quay lại */
    .back-button {
        display: block;
        position: absolute;
        top: 10px;
        left: 10px;
        z-index: 100;
        background-color: var(--primary-color);
        color: white;
        border: none;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        font-size: 18px;
        cursor: pointer;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    }
    
    /* Ẩn nút quay lại khi không có chat được chọn */
    .back-button.hidden {
        display: none;
    }
    
    /* Điều chỉnh hiển thị sidebar và chat-area */
    .app-container {
        position: relative;
        overflow: hidden;
    }
    
    .sidebar {
        position: absolute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
        z-index: 10;
        transition: transform 0.3s ease;
    }
    
    .chat-area {
        position: absolute;
        width: 100%;
        height: 100%;
        left: 0;
        top: 0;
        z-index: 5;
    }
    
    /* Khi chat được chọn, ẩn sidebar */
    .chat-selected .sidebar {
        transform: translateX(-100%);
    }
    
    /* Đảm bảo empty-chat-placeholder không che mất danh sách chat */
    .empty-chat-placeholder {
        z-index: 1;
    }
}
.chat-link {
  color: #00c3ff;
  text-decoration: underline;
  word-break: break-word;
}
.chat-link:hover {
  text-decoration: none;
}
.chat-area {
  background-color: #f7f7f7; /* fallback khi chưa có ảnh */
  background-repeat: no-repeat;
}
.predefined-bg-list {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.predefined-bg-list img {
  width: 100%;
  height: 60px;
  object-fit: cover;
  cursor: pointer;
  border-radius: 6px;
  transition: 0.2s ease;
}
.chat-area {
  --incoming-bubble-color: #f1f1f1;
  --outgoing-bubble-color: #0084ff;
}

.chat-area .message.incoming .message-bubble {
  background-color: var(--incoming-bubble-color);
  color: #000;
}

.chat-area .message.outgoing .message-bubble {
  background-color: var(--outgoing-bubble-color);
  color: #fff;
}

/* header + input mặc định */
.chat-header {
  background-color: #ffffff;
  color: rgb(0, 0, 0);
  transition: background 0.3s ease;
}

.message-input-container {
  background-color: #f1f1f1;
  transition: background 0.3s ease;
}

.message-options {
  display: none;
  position: absolute;
  top: -5px;
  right: -5px;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 12px;
  white-space: nowrap;
  cursor: pointer;
}
.message-content:hover .message-options {
  display: flex;
  gap: 8px;
}
.message-time-inline {
  margin-left: 6px;
  font-size: 11px;
  opacity: 0.7;
}


@media (max-width: 480px) {
  /* Chữ trong bong bóng nhỏ hơn */
  .message-bubble {
    font-size: 14px;
  }

  /* Avatar trong tin nhắn nhỏ hơn */
  .message-avatar img {
    width: 28px;
    height: 28px;
  }

  /* Avatar trong danh sách chat nhỏ hơn */
  .chat-avatar img {
    width: 36px;
    height: 36px;
  }

  /* Ảnh trong tin nhắn nhỏ hơn */
  .message-image {
    max-width: 180px !important;
    max-height: 180px !important;
    border-radius: 10px;
  }

  
}
/* Khung video YouTube mặc định */
.youtube-video iframe {
  width: 300px;
  height: 180px;
  border-radius: 10px;
  max-width: 100%;
}

/* Responsive cho màn hình nhỏ */
@media (max-width: 480px) {
  .youtube-video iframe {
    width: 100%;
    height: 160px !important; /* hoặc 150px nếu muốn nhỏ hơn nữa */
  }
}