/* File: style.css (Bản đầy đủ và ổn định) */
/* --- BIẾN MÀU & THIẾT KẾ --- */
:root {
    --primary-color: #0d6efd;
    --primary-color-dark: #0b5ed7;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;

    --light-bg: #f8f9fa;
    --light-bg-card: #ffffff;
    --light-text: #212529;
    --light-text-secondary: #6c757d;
    --light-border: #e9ecef;

    --dark-bg: #1c1c1e;
    --dark-bg-card: #2c2c2e;
    --dark-text: #f2f2f7;
    --dark-text-secondary: #a1a1a6;
    --dark-border: #444446;

    --font-family: 'Public Sans', sans-serif;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --box-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --border-radius: 10px;
    --sidebar-width: 260px;
    --header-height: 70px;
    --transition-speed: 0.3s;
}

/* --- THIẾT LẬP GỐC --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    font-size: 16px;
    background-color: var(--light-bg);
    color: var(--light-text);
    -webkit-font-smoothing: antialiased;
}

body.dark-theme {
    --light-bg: var(--dark-bg);
    --light-bg-card: var(--dark-bg-card);
    --light-text: var(--dark-text);
    --light-text-secondary: var(--dark-text-secondary);
    --light-border: var(--dark-border);
}

/* --- THANH CUỘN & TIỆN ÍCH --- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 3px;
}

body.dark-theme ::-webkit-scrollbar-thumb {
    background: #555;
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}


/* --- GIAO DIỆN ĐĂNG NHẬP --- */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #0d4191 0%, #c3cfe2 100%);
}

.login-container {
    padding: 2.5rem;
    width: 100%;
    max-width: 450px;
    background: var(--light-bg-card);
    box-shadow: var(--box-shadow-lg);
    border-radius: var(--border-radius);
    border: 1px solid var(--light-border);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.login-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--light-text-secondary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group.floating-label {
    position: relative;
}

.floating-label .form-control {
    height: 50px;
    padding-left: 45px;
    background-color: var(--light-bg-card);
}

.floating-label .input-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text-secondary);
    transition: color 0.3s;
    z-index: 2;
}

.floating-label label {
    position: absolute;
    top: 13px;
    left: 45px;
    color: var(--light-text-secondary);
    background-color: var(--light-bg-card);
    padding: 0 5px;
    transition: all 0.2s ease-in-out;
    pointer-events: none;
    z-index: 1;
}

.floating-label .form-control:focus+label,
.floating-label .form-control:not(:placeholder-shown)+label {
    top: -10px;
    font-size: 0.8em;
    color: var(--primary-color);
    z-index: 3;
}

.floating-label .form-control:focus~.input-icon {
    color: var(--primary-color);
}

.form-control {
    font-size: 1rem;
    width: 100%;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-border);
    background-color: var(--light-bg);
    color: var(--light-text);
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.login-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.forgot-password {
    font-size: 0.9em;
}

.btn {
    padding: 10px 18px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-color-dark);
    box-shadow: 0 4px 15px color-mix(in srgb, var(--primary-color) 30%, transparent);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
    padding: 14px;
    font-size: 1.1em;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

/* --- LAYOUT CHÍNH CỦA ỨNG DỤNG --- */
.app-container {
    display: flex;
}

.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--light-bg-card);
    border-right: 1px solid var(--light-border);
    position: fixed;
    top: 0;
    left: 0;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-speed) ease;
    z-index: 1001;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: var(--header-height);
    padding: 0 1rem;
    border-bottom: 1px solid var(--light-border);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.menu {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem 0;
}

.menu-item a {
    display: flex;
    align-items: center;
    padding: 12px 1.5rem;
    margin: 4px 0.75rem;
    color: var(--light-text-secondary);
    transition: all 0.2s;
    border-radius: var(--border-radius);
    font-weight: 500;
}

.menu-item.active a,
.menu-item a:hover {
    color: var(--primary-color);
    background-color: color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.menu-item.active a {
    font-weight: 600;
}

.menu-item a i {
    width: 24px;
    text-align: center;
    margin-right: 12px;
    font-size: 1.1em;
}

.menu-divider {
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--light-text-secondary);
    padding: 1rem 1.5rem;
    margin-top: 1rem;
    opacity: 0.7;
}

.main-wrapper {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    transition: all var(--transition-speed) ease;
}

.main-header {
    height: var(--header-height);
    background: var(--light-bg-card);
    border-bottom: 1px solid var(--light-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    position: sticky;
    top: 0;
    z-index: 999;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#menu-toggle {
    display: none;
}

.search-bar {
    position: relative;
}

.search-bar i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text-secondary);
}

.search-bar input {
    background-color: var(--light-bg);
    border: none;
    border-radius: var(--border-radius);
    padding: 10px 15px 10px 40px;
    width: 300px;
    color: var(--light-text);
}

.search-bar input:focus {
    outline: 1px solid var(--primary-color);
}

.btn-icon {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    color: var(--light-text-secondary);
    padding: 8px;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
}

.btn-icon:hover {
    background-color: var(--light-bg);
    color: var(--light-text);
}

.user-menu {
    position: relative;
}

.user-menu-button {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: transparent;
    border: none;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s;
}

.user-menu-button:hover {
    background-color: var(--light-bg);
}

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

.user-info {
    text-align: left;
    color: var(--light-text);
}

.username {
    font-weight: 600;
    display: block;
}

.user-role {
    font-size: 0.85em;
    color: var(--light-text-secondary);
}

body.dark-theme .user-info {
    color: var(--dark-text);
}

body.dark-theme .user-role {
    color: var(--dark-text-secondary);
}

.user-menu-button i {
    transition: transform 0.2s;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background-color: var(--light-bg-card);
    border: 1px solid var(--light-border);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 220px;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
}

.dropdown-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    color: var(--light-text);
    font-size: 0.95rem;
}

.dropdown-item:hover {
    background-color: var(--light-bg);
}

.dropdown-item.logout {
    color: var(--danger-color);
}

.dropdown-divider {
    height: 1px;
    background-color: var(--light-border);
    margin: 8px 0;
}

.dropdown-item i {
    width: 20px;
    text-align: center;
    color: var(--light-text-secondary);
}

.page-content {
    padding: 2rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.page-header p {
    color: var(--light-text-secondary);
}

/* --- CÁC THÀNH PHẦN GIAO DIỆN --- */
.card {
    background-color: var(--light-bg-card);
    border: 1px solid var(--light-border);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--light-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h4 {
    font-size: 1.2rem;
    margin: 0;
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--light-border);
    background-color: var(--light-bg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: var(--light-bg-card);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}

.card-content {
    min-width: 0;
}

.card-content p {
    color: var(--light-text-secondary);
    margin-bottom: 0.25rem;
}

.card-content h3 {
    font-size: 2rem;
    overflow-wrap: break-word;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.activity-list li {
    border-bottom: 1px solid var(--light-border);
    padding-bottom: 1rem;
}

.activity-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.table-wrapper {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--light-border);
}

.table th {
    background-color: var(--light-bg);
    font-weight: 600;
}

.table tbody tr:hover {
    background-color: var(--light-bg);
}

/* --- NÂNG CẤP GIAO DIỆN --- */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.table-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.badge {
    padding: 4px 10px;
    border-radius: 15px;
    font-size: 0.8em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table .badge {
    color: white;
}

.badge-success {
    background-color: var(--success-color);
}

.badge-warning {
    background-color: var(--warning-color);
    color: #111;
}

.badge-danger {
    background-color: var(--danger-color);
}

.lesson-plan {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.week-card {
    background-color: var(--light-bg-card);
    border: 1px solid var(--light-border);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.week-card-header {
    padding: 1.5rem 1.5rem 0 1.5rem;
}

.week-card-header h4 {
    font-size: 1.3rem;
}

.lesson-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    border-top: 1px solid var(--light-border);
    transition: background-color 0.2s, box-shadow 0.2s;
}

.lesson-item:hover {
    background-color: var(--light-bg);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.lesson-info {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.lesson-icon {
    font-size: 2rem;
    color: var(--primary-color);
    width: 45px;
    text-align: center;
}

.lesson-info h5 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.lesson-info p {
    color: var(--light-text-secondary);
    font-size: 0.9em;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    text-align: center;
    background-color: var(--light-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.tool-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tool-card h5 {
    margin-bottom: 0.5rem;
}

.tool-card p {
    font-size: 0.9em;
    color: var(--light-text-secondary);
    margin-bottom: 1rem;
}

.tool-card .btn {
    background-color: var(--light-bg-card);
    border: 1px solid var(--light-border);
    color: var(--light-text);
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.pagination a {
    color: var(--light-text-secondary);
    padding: 8px 12px;
    border-radius: var(--border-radius);
}

.pagination a:hover {
    background-color: var(--light-bg);
}

.pagination a.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.settings-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 2rem;
}

.settings-sidebar .menu-item a {
    margin: 2px 0;
}

.swal-form {
    text-align: left;
}

.swal-form .form-group {
    margin-bottom: 1rem;
}

.swal-form .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.swal-form textarea.form-control {
    min-height: 80px;
}

/* --- MOBILE & OVERLAY --- */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.mobile-overlay.active {
    display: block;
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
        z-index: 1002;
    }

    .sidebar.active {
        transform: translateX(0);
        box-shadow: 0 0 30px rgba(0, 0, 0, 0.2);
    }

    .main-wrapper {
        margin-left: 0;
        width: 100%;
    }

    #menu-toggle {
        display: block;
    }

    .search-bar {
        display: none;
    }

    .settings-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-content {
        padding: 1.5rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .user-info {
        display: none;
    }

    .main-header {
        padding: 0 1.5rem;
    }

    .lesson-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

/* --- SỬA LỖI HIỂN THỊ AUTOFILL CỦA TRÌNH DUYỆT --- */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active {
    box-shadow: 0 0 0 1000px var(--light-bg-card) inset !important;
    -webkit-text-fill-color: var(--light-text) !important;
    transition: background-color 5000s ease-in-out 0s;
}

body.dark-theme input:-webkit-autofill,
body.dark-theme input:-webkit-autofill:hover,
body.dark-theme input:-webkit-autofill:focus,
body.dark-theme input:-webkit-autofill:active {
    box-shadow: 0 0 0 1000px var(--dark-bg-card) inset !important;
    -webkit-text-fill-color: var(--dark-text) !important;
}

/* --- STYLE CHO BIỂU ĐỒ CỘT --- */
.chart-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-end;
    height: 250px;
    padding: 1rem;
    border-bottom: 1px solid var(--light-border);
}

.chart-bar {
    position: relative;
    width: 12%;
    background-color: var(--color, var(--primary-color));
    border-radius: 5px 5px 0 0;
    height: var(--height, 0%);
    animation: grow-bar 1s ease-out forwards;
    transition: filter 0.2s;
}

.chart-bar:hover {
    filter: brightness(1.1);
}

.bar-tooltip {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--light-text);
    color: var(--light-bg-card);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
}

.chart-bar:hover .bar-tooltip {
    opacity: 1;
}

body.dark-theme .bar-tooltip {
    background-color: var(--dark-text);
    color: var(--dark-bg-card);
}

.chart-labels {
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 1rem;
    font-size: 0.9em;
    color: var(--light-text-secondary);
}

@keyframes grow-bar {
    from {
        height: 0%;
    }

    to {
        height: var(--height, 0%);
    }
}

/* --- STYLE CHO TRANG CHI TIẾT CHƯƠNG TRÌNH --- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-size: 0.9em;
    color: var(--light-text-secondary);
}

.breadcrumb a {
    color: var(--primary-color);
}

.breadcrumb .separator {
    color: var(--light-text-secondary);
}

.lesson-item .lesson-actions {
    display: flex;
    gap: 0.5rem;
}

/* --- STYLE CHO PHÂN TRANG & GIAO DIỆN MỚI --- */
.pagination-wrapper {
    display: flex;
    justify-content: center;
    padding: 1.5rem;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary.btn-sm {
    padding: 6px 12px;
    font-size: 0.9em;
}

/* --- STYLE CHO TRANG THƯ VIỆN TRÒ CHƠI --- */
.content-grid-half {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.games-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.game-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    background-color: var(--light-bg);
    border: 1px solid var(--light-border);
    cursor: pointer;
}

.game-icon {
    font-size: 2rem;
    color: var(--primary-color);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: color-mix(in srgb, var(--primary-color) 15%, transparent);
    flex-shrink: 0;
}

.game-info h5 {
    margin-bottom: 0.25rem;
}

.game-info p {
    font-size: 0.9em;
    color: var(--light-text-secondary);
}

.game-actions {
    margin-left: auto;
}

.game-card.active,
.game-card:hover {
    border-color: var(--primary-color);
    background-color: color-mix(in srgb, var(--primary-color) 5%, transparent);
    box-shadow: var(--box-shadow);
}

fieldset {
    border: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

legend {
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    width: 100%;
    border-bottom: 1px solid var(--light-border);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

.code-editor {
    font-family: monospace;
    background-color: var(--light-bg);
    color: var(--light-text);
    border: 1px solid var(--light-border);
    border-radius: var(--border-radius);
    padding: 1rem;
}

body.dark-theme .code-editor {
    background-color: var(--dark-bg);
    color: var(--dark-text);
}

/* --- STYLE CHO DUAL LISTBOX (PHÂN BỔ) --- */
.dual-listbox-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.dual-listbox {
    width: 45%;
}

.dual-listbox label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.dual-listbox select {
    width: 100%;
    height: 250px;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-border);
    padding: 0.5rem;
    margin-top: 10px;
}

.dual-listbox select option {
    padding: 8px;
    cursor: pointer;
}

.dual-listbox select option:hover {
    background-color: color-mix(in srgb, var(--primary-color) 10%, transparent);
}

.dual-listbox-controls {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.dual-listbox-controls .btn {
    min-width: 50px;
}

/* --- COMPONENT INPUT FILE TÙY CHỈNH --- */
.file-input-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 8px;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-border);
    background-color: var(--light-bg);
    transition: all 0.2s;
}

.file-input-container:hover {
    border-color: var(--primary-color);
}

.file-input-hidden {
    display: none;
}

.file-input-label {
    flex-shrink: 0;
}

.file-name-display {
    color: var(--light-text);
    font-size: 0.9em;
    font-style: normal;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-name-display.placeholder {
    color: var(--light-text-secondary);
    font-style: italic;
}

/* --- STYLE BỔ SUNG CHO FORM --- */
.form-group-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.swal-form fieldset legend {
    font-size: 1.1em;
}

.swal-form label i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

/* --- STYLE CHO MODAL PHÂN BỔ NÂNG CAO --- */
.swal-tabs {
    display: flex;
    border-bottom: 2px solid var(--light-border);
    margin-bottom: 1.5rem;
}

.swal-tab-item {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-weight: 500;
    color: var(--light-text-secondary);
}

.swal-tab-item.active {
    border-bottom-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.swal-tab-content {
    display: none;
}

.swal-tab-content.active {
    display: block;
}

/* --- STYLE BỔ SUNG CHO MODAL CHI TIẾT --- */
.swal-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 1.5rem;
    text-align: left;
    margin-bottom: 1rem;
}

.swal-details-grid .detail-item {
    padding: 5px 0;
}

.swal-form hr {
    border: none;
    border-top: 1px solid var(--light-border);
    margin: 1.5rem 0;
}

body.dark-theme .swal2-popup {
    background-color: var(--dark-bg-card);
    color: var(--dark-text);
}

body.dark-theme .swal2-title {
    color: var(--dark-text);
}

body.dark-theme .swal2-html-container {
    color: var(--dark-text-secondary);
}

body.dark-theme .swal2-input,
body.dark-theme .swal2-select,
body.dark-theme .swal2-textarea {
    background-color: var(--dark-bg);
    border-color: var(--dark-border);
    color: var(--dark-text);
}

body.dark-theme .swal2-close-button:hover {
    color: var(--primary-color);
}

body.dark-theme .swal2-header {
    border-bottom: 1px solid var(--dark-border);
}

/* --- DARK THEME OVERRIDES FOR SELECT2 --- */
body.dark-theme .select2-container--default .select2-selection--single {
    background-color: var(--dark-bg);
    border-color: var(--dark-border);
}

/* Màu chữ của lựa chọn đã chọn */
body.dark-theme .select2-container--default .select2-selection--single .select2-selection__rendered {
    color: var(--dark-text);
}

/* Màu của mũi tên dropdown */
body.dark-theme .select2-container--default .select2-selection--single .select2-selection__arrow b {
    border-color: var(--dark-text-secondary) transparent transparent transparent;
}

/* Nền của dropdown khi được mở ra */
body.dark-theme .select2-dropdown {
    background-color: var(--dark-bg-card);
    border-color: var(--dark-border);
}

/* Ô tìm kiếm bên trong dropdown */
body.dark-theme .select2-container--default .select2-search--dropdown .select2-search__field {
    background-color: var(--dark-bg);
    border-color: var(--dark-border);
    color: var(--dark-text);
}

/* Màu chữ của các lựa chọn trong danh sách */
body.dark-theme .select2-container--default .select2-results__option {
    color: var(--dark-text-secondary);
}

/* Lựa chọn khi được hover hoặc focus (highlight) */
body.dark-theme .select2-container--default .select2-results__option--highlighted[aria-selected] {
    background-color: var(--primary-color);
    color: white;
}

/* Lựa chọn đã được chọn (trong trường hợp multi-select) */
body.dark-theme .select2-container--default .select2-results__option[aria-selected=true] {
    background-color: color-mix(in srgb, var(--primary-color) 20%, transparent);
}

/* --- STYLE NÂNG CẤP CHO GIAO DIỆN HỌC SINH --- */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-card {
    background-color: var(--light-bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-lg);
}

.course-card .course-image {
    height: 180px;
    background-size: cover;
    background-position: center;
}

.course-info {
    padding: 1.5rem;
}

.course-tag {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.8em;
    font-weight: 600;
    border-radius: 15px;
    background-color: color-mix(in srgb, var(--primary-color) 15%, transparent);
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.course-info h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.course-progress p {
    font-size: 0.9em;
    color: var(--light-text-secondary);
    margin-bottom: 0.5rem;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: var(--light-bg);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background-color: var(--success-color);
    border-radius: 4px;
    transition: width 0.5s ease;
}

.tabs-container {
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--light-border);
    margin-bottom: 1.5rem;
}

.tab-item {
    padding: 10px 20px;
    cursor: pointer;
    font-weight: 500;
    color: var(--light-text-secondary);
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.tab-item.active,
.tab-item:hover {
    color: var(--primary-color);
}

.tab-item.active {
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.homework-card {
    background-color: var(--light-bg-card);
    border: 1px solid var(--light-border);
    border-left: 5px solid var(--primary-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.homework-card.status-done {
    border-left-color: var(--success-color);
}

.homework-card.status-pending {
    border-left-color: var(--warning-color);
}

.homework-details h5 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.homework-details p {
    color: var(--light-text-secondary);
}

.homework-score {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--success-color);
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: var(--light-bg-card);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
}

.profile-header .avatar {
    width: 80px;
    height: 80px;
}

.profile-stats {
    flex-grow: 1;
}

.profile-stats h3 {
    font-size: 1.8rem;
}

.xp-bar-container {
    width: 100%;
    height: 12px;
    background-color: var(--light-bg);
    border-radius: 6px;
    margin-top: 0.5rem;
}

.xp-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--warning-color), #ffeb3b);
    border-radius: 6px;
    position: relative;
}

.xp-bar::after {
    content: 'XP';
    position: absolute;
    right: 5px;
    top: -2px;
    font-size: 0.7em;
    font-weight: bold;
    color: #fff;
}

.achievement-badge {
    position: relative;
}

.achievement-badge.locked::after {
    content: '\f023';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2rem;
    color: rgba(0, 0, 0, 0.5);
}

.achievement-badge .badge-tooltip {
    visibility: hidden;
    width: 160px;
    background-color: var(--light-text);
    color: var(--light-bg-card);
    text-align: center;
    border-radius: 6px;
    padding: 5px 10px;
    position: absolute;
    z-index: 1;
    bottom: 105%;
    left: 50%;
    margin-left: -80px;
    opacity: 0;
    transition: opacity 0.3s;
}

.achievement-badge:hover .badge-tooltip {
    visibility: visible;
    opacity: 1;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- BỔ SUNG VÀ NÂNG CẤP GIAO DIỆN --- */
.presentation-modal {
    max-width: 95vw !important;
}

.presentation-layout {
    display: flex;
    gap: 1rem;
    height: 75vh;
}

.presentation-main {
    flex-grow: 1;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: center;
    align-items: center;
}

.presentation-content-placeholder {
    text-align: center;
    color: var(--light-text-secondary);
}

.presentation-content-placeholder i {
    font-size: 4rem;
}

.presentation-sidebar {
    width: 280px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.student-list {
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1rem;
    flex-grow: 1;
    overflow-y: auto;
}

.student-list li {
    padding: 8px 12px;
    border-radius: 5px;
    cursor: pointer;
}

.student-list li.active,
.student-list li:hover {
    background-color: color-mix(in srgb, var(--primary-color) 15%, transparent);
    color: var(--primary-color);
    font-weight: 500;
}

.interactive-tools {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    background: var(--light-bg);
    border: 1px solid var(--light-border);
    padding: 1rem 0.5rem;
    border-radius: 5px;
    cursor: pointer;
}

.tool-btn:hover {
    background-color: var(--light-border);
}

.tool-btn i {
    font-size: 1.5rem;
}

.feedback-details-container {
    text-align: left;
}

.feedback-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.feedback-header h4 {
    margin: 0;
    font-size: 1.5rem;
}

.achievement-badge-v2 {
    position: relative;
    padding: 1.5rem;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    text-align: center;
    overflow: hidden;
    border: 1px solid var(--light-border);
}

.achievement-badge-v2 img {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem auto;
    transition: transform 0.3s ease;
}

.achievement-badge-v2:hover img {
    transform: scale(1.1);
}

.achievement-badge-v2 h5 {
    font-size: 1em;
}

.achievement-badge-v2.locked {
    background-color: var(--light-bg);
}

.achievement-badge-v2.locked::before {
    content: '\f023';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--light-text-secondary);
    background-color: rgba(255, 255, 255, 0.7);
    z-index: 1;
}

body.dark-theme .achievement-badge-v2.locked::before {
    background-color: rgba(0, 0, 0, 0.7);
}

.achievement-badge-v2.locked img,
.achievement-badge-v2.locked h5 {
    filter: grayscale(100%);
    opacity: 0.4;
}

.badge-shine {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(to right, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.5) 50%, rgba(255, 255, 255, 0) 100%);
    transform: rotate(30deg);
    animation: shine 5s infinite linear;
    pointer-events: none;
}

.achievement-badge-v2.locked .badge-shine {
    display: none;
}

@keyframes shine {
    from {
        left: -100%;
    }

    to {
        left: 100%;
    }
}

/* --- CẬP NHẬT STYLE CHO AVATAR --- */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    display: flex;
    /* Thêm để căn giữa chữ */
    align-items: center;
    /* Thêm để căn giữa chữ */
    justify-content: center;
    /* Thêm để căn giữa chữ */
    font-size: 1.2rem;
    /* Cỡ chữ cho avatar text */
    font-weight: 600;
    color: white;
    text-transform: uppercase;
}

/* Style cho ảnh bên trong container avatar */
.avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

/* --- RESPONSIVE TABLE STYLES --- */
@media (max-width: 992px) {
    .table-responsive-stack thead {
        display: none;
        /* Ẩn header của bảng trên mobile */
    }

    .table-responsive-stack tr {
        display: block;
        border: 1px solid var(--light-border);
        border-radius: var(--border-radius);
        margin-bottom: 1.5rem;
        box-shadow: var(--box-shadow);
    }

    .table-responsive-stack td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--light-border);
        text-align: right;
        /* Căn phải cho dữ liệu */
    }

    .table-responsive-stack td:before {
        content: attr(data-label);
        font-weight: 600;
        text-align: left;
        /* Căn trái cho tiêu đề */
        margin-right: 1rem;
        flex-shrink: 0;
    }

    .table-responsive-stack tr td:last-child {
        border-bottom: none;
    }

    /* Chỉnh lại nút bấm trên mobile */
    .table-responsive-stack td[data-label="Hành động"] {
        justify-content: flex-end;
        /* Đẩy nút về cuối */
        gap: 0.5rem;
    }

}

/* --- SCHOOLS PAGE: FILTER & RESPONSIVE FIXES --- */

/* Bố cục cho cụm điều khiển bộ lọc */
.table-controls {
    display: flex;
    flex-wrap: wrap;
    /* Cho phép các item xuống dòng trên màn hình nhỏ */
    gap: 1rem;
    /* Tạo khoảng cách giữa các item */
    align-items: center;
    margin-bottom: 1.5rem;
}

/* Cho phép ô tìm kiếm co giãn linh hoạt */
.table-controls .search-bar {
    flex-grow: 1;
    /* Chiếm hết không gian còn thừa */
    min-width: 250px;
    /* Độ rộng tối thiểu */
}

/* Thiết lập độ rộng cho các ô select */
.table-controls .form-control {
    width: auto;
    /* Bỏ width cố định */
    min-width: 200px;
    /* Đặt độ rộng tối thiểu */
    flex-shrink: 0;
    /* Không cho phép bị co lại */
}

input#import-file-input {
    margin: 10px 0;
}

/* Sửa lỗi responsive trên mobile */
@media (min-width: 1000px) {
    .table-wrapper {
        height: calc(100vh - 380px);
        overflow-y: auto;
    }
}

@media (max-width: 992px) {

    /* Ghi đè lại quy tắc display: none; của search-bar chung */
    /* Quy tắc này sẽ ưu tiên hơn vì nó cụ thể hơn */
    .table-controls .search-bar {
        display: block;
        width: 100% !important;
        /* Chiếm toàn bộ chiều rộng trên mobile */
    }

    /* Các ô lọc cũng chiếm toàn bộ chiều rộng */
    .table-controls .form-control {
        width: 100% !important;
    }
}

/* --- SELECT2 HEIGHT FIX --- */
.select2-container--default .select2-selection--single {
    height: calc(1.5em + .75rem + 2px);
    /* Tính toán chiều cao giống .form-control */
    padding: .375rem .75rem;
    display: flex;
    align-items: center;
}

body.dark-theme .select2-container--default .select2-selection--single {
    height: calc(1.5em + .75rem + 2px);
}

body.dark-theme .fas.fa-chevron-down {
    display: none;
}

/* --- STICKY HEADER/FOOTER CHO MODAL DÀI (SWEETALERT2) --- */

/* Biến modal thành một flex container theo chiều dọc */
.swal2-popup {
    display: flex !important;
    /* Ghi đè style mặc định của thư viện */
    flex-direction: column;
    max-height: 90vh;
    /* Giới hạn chiều cao tối đa của modal là 90% chiều cao màn hình */
}

/* Header (chứa title) sẽ không bị co lại */
.swal2-header {
    flex-shrink: 0;
}

/* Phần thân (chứa form) sẽ co giãn và có thanh cuộn riêng */
.swal2-html-container {
    flex-grow: 1;
    /* Cho phép co giãn để lấp đầy không gian còn lại */
    overflow-y: auto;
    /* Tự động hiển thị thanh cuộn dọc khi nội dung dài hơn */
    padding-left: 1em;
    /* Thêm một chút đệm để nội dung không bị dính sát vào lề */
    padding-right: 1em;
}

/* Footer (chứa các nút lệnh) sẽ không bị co lại */
.swal2-actions {
    flex-shrink: 0;
}

/* --- DARK THEME FIX FOR SWAL2 VALIDATION MESSAGE --- */
body.dark-theme .swal2-validation-message {
    background: color-mix(in srgb, var(--danger-color) 20%, transparent) !important;
    color: var(--dark-text) !important;
}

/* --- WEEK CARD HEADER PADDING FIX --- */
.week-card-header {
    padding: 1rem;
}

.resource-icons {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.resource-icons i {
    font-size: 1.2rem;
    color: var(--primary-color);
    cursor: pointer;
    transition: color 0.2s;
}

.resource-icons i:hover {
    color: var(--primary-color-dark);
}

/* --- FULLSCREEN BUTTON FOR SWAL2 IFRAME --- */
.swal2-html-container {
    position: relative;
    /* Cần thiết để định vị nút fullscreen */
}

.swal2-fullscreen-button {
    position: absolute;
    top: 5px;
    right: 25px;
    z-index: 10;
    border: none;
    background: rgba(0, 0, 0, 0.2);
    color: white;
    width: 32px;
    height: 32px;
    line-height: 32px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.2s;
}

.swal2-fullscreen-button:hover {
    background: rgba(0, 0, 0, 0.4);
}

/* --- SELECT2 WIDTH & MULTI-SELECT FIXES --- */

/* Đảm bảo tất cả select2 trong form đều rộng 100% */
.swal-form .select2-container {
    width: 100% !important;
    max-width: 100%;
}

/* Style chung cho ô đa lựa chọn, giúp nó giống các .form-control khác */
.select2-container--default .select2-selection--multiple {
    background-color: var(--light-bg);
    border: 1px solid var(--light-border);
    border-radius: var(--border-radius);
    padding: 0.2rem;
    min-height: calc(1.5em + .75rem + 2px);
    /* Chiều cao tối thiểu bằng ô input */
}

.select2-container--default .select2-selection--multiple .select2-selection__choice {
    background-color: var(--primary-color);
    border: none;
    color: white;
    border-radius: 5px;
    padding: 3px 8px;
    min-width: 80px;
    text-align: center;
}

.select2-container--default .select2-selection--multiple .select2-selection__choice__remove {
    color: rgba(255, 255, 255, 0.7);
    margin-right: 5px;
}

.select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover {
    color: white;
}


/* --- DARK THEME OVERRIDES FOR SELECT2 (MULTI-SELECT) --- */

body.dark-theme .select2-container--default .select2-selection--multiple {
    background-color: var(--dark-bg);
    border-color: var(--dark-border);
}

/* Màu chữ placeholder (ví dụ: '-- Chọn các khối lớp --') */
body.dark-theme .select2-container--default .select2-selection--multiple .select2-selection__placeholder {
    color: var(--dark-text-secondary);
}

/* Các "viên thuốc" lựa chọn trong giao diện tối */
body.dark-theme .select2-container--default .select2-selection--multiple .select2-selection__choice {
    background-color: var(--primary-color);
    color: white;
}

body.dark-theme .select2-container--default .select2-selection--multiple .select2-selection__choice__remove {
    color: rgba(255, 255, 255, 0.7);
}

body.dark-theme .select2-container--default .select2-selection--multiple .select2-selection__choice__remove:hover {
    color: white;
}

/* --- TEACHING MODAL UI/UX IMPROVEMENTS --- */

/* 1. Style cho khu vực "Tải xuống tài nguyên" */
.presentation-download-placeholder {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    gap: 1.5rem;
    color: var(--light-text-secondary);
    padding: 2rem;
    text-align: center;
}

.presentation-download-placeholder i {
    font-size: 4rem;
    color: var(--secondary-color);
}

/* 2. Style lại danh sách tài nguyên bài giảng */
.resource-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.resource-list-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    background-color: var(--light-bg);
    border: 1px solid var(--light-border);
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.resource-list-item:hover {
    border-color: var(--primary-color);
    background-color: color-mix(in srgb, var(--primary-color) 10%, transparent);
    color: var(--primary-color);
}

.resource-list-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    font-weight: 600;
}

.resource-list-item i {
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

/* 3. Nút Fullscreen và di chuyển nút Close */
.presentation-main {
    position: relative;
    /* Cần thiết để định vị nút fullscreen */
}

.presentation-fullscreen-button {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    border: none;
    background: rgba(0, 0, 0, 0.3);
    color: white;
    width: 36px;
    height: 36px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.presentation-fullscreen-button:hover {
    background: rgba(0, 0, 0, 0.5);
}

/* Di chuyển nút close của modal */
.swal2-popup.presentation-modal .swal2-close {
    top: 1.1rem;
    right: 1.5rem;
    width: 30px;
    height: 30px;
    font-size: 1.5rem;
}

/* --- GLOBAL SWEETALERT2 CLOSE BUTTON FIX --- */

/* Áp dụng cho tất cả các modal để đảm bảo tính nhất quán */
.swal2-popup .swal2-close {
    position: absolute;
    top: 1rem;
    /* Căn lề trên */
    right: 1.25rem;
    /* Căn lề phải, đưa nút sang bên phải */
    width: 40px;
    /* Tăng chiều rộng */
    height: 40px;
    /* Tăng chiều cao */
    font-size: 2rem;
    /* Tăng kích thước icon (dấu X) */
    color: var(--secondary-color);
    border: none;
    outline: none;
    transition: color 0.2s;
}

.swal2-popup .swal2-close:hover {
    color: var(--primary-color);
    transform: none;
    /* Bỏ hiệu ứng xoay mặc định */
}

/* Chỉnh lại title để không bị nút Close đè lên */
.swal2-title {
    padding-right: 2.5rem;
    /* Tạo khoảng trống bên phải cho nút close */
}

/* --- FORM GROUP SPACING FIX --- */

/* Áp dụng cho tất cả các label bên trong .form-group và .swal-form */
.form-group label,
.swal-form .form-group label {
    display: block;
    /* Đảm bảo label chiếm một dòng riêng và nhận margin bottom */
    margin-bottom: 0.5rem;
    /* Tạo khoảng cách 8px (mặc định) phía dưới label */
    font-weight: 500;
    /* Làm chữ đậm hơn một chút cho rõ ràng */
}

/* --- FEEDBACK CHAT STYLE --- */
.feedback-chat-container {
    max-height: 250px;
    overflow-y: auto;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: 5px;
    border: 1px solid var(--light-border);
}

.chat-entry {
    margin-bottom: 1rem;
}

.chat-header {
    font-size: 0.8em;
    font-weight: 600;
    color: var(--light-text-secondary);
    margin-bottom: 0.25rem;
}

.chat-content {
    background-color: var(--light-bg-card);
    padding: 0.75rem;
    border-radius: 5px;
    white-space: pre-wrap;
    /* Giữ lại các dấu xuống dòng */
}

/* --- REPORTS PAGE UI FIXES --- */

/* Thêm khoảng cách cho tiêu đề báo cáo */
.tab-content h4 {
    margin-top: 1.5rem;
}

/* Sửa lỗi hiển thị input date trong Dark Mode */
body.dark-theme input[type="date"] {
    background-color: var(--dark-bg);
    color: var(--dark-text);
    border-color: var(--dark-border);
    color-scheme: dark;
    /* Báo cho trình duyệt dùng bộ icon sáng màu */
}

/* --- REPORTS PAGE BUTTON ALIGNMENT FIX --- */
.table-controls .btn {
    margin-left: auto;
    /* Tự động đẩy nút về phía cuối bên phải */
}

/* --- REPORTS PAGE FILTER ALIGNMENT FIX --- */

.table-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
    /* Căn tất cả các item thẳng hàng theo đáy */
}

/* Cho phép các ô lọc co giãn */
.table-controls .form-group {
    flex-grow: 1;
    min-width: 200px;
    /* Đảm bảo các ô không bị quá hẹp */
}

/* Cho ô tìm kiếm chiếm nhiều không gian hơn nếu có */
.table-controls .search-bar {
    flex-grow: 2;
}

/* Nút bấm sẽ không co giãn và nằm cùng hàng */
.table-controls .btn {
    flex-shrink: 0;
    margin-left: auto;
    /* Tự động đẩy nút về phía cuối bên phải */
}

.lesson-item.false {
    color: red;
}

div#pagination-container {
    margin: auto;
    text-align: center;
}

div#pagination-container {
    margin: auto;
    text-align: center;
}

div#pagination-container button {
    margin: 0 5px;
}

div#pagination-container button.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}
span.badge.badge-info {
    background-color: #03A9F4;
    margin: 5px;
    display: inline-block;
    font-size: 80%;
}
/* style.css */

.offline-indicator {
    color: #ffc107; /* Màu vàng cảnh báo */
    font-size: 0.8em;
    font-style: italic;
}
table .badge,th,td[data-label="Hành động"]{white-space: nowrap;}