/* css/pages/dashboard.css */

.dashboard-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    /* Sidebar cố định, nội dung linh hoạt */
    gap: 2rem;
    align-items: start;
}

.dashboard-sidebar {
    position: sticky;
    top: 100px;
    /* Khoảng cách với header */
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.container container--full-width {
    max-width: 100%;
    padding-left: 2rem;
    padding-right: 2rem;
}

.dashboard-card-header {
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    /* Cho phép xuống dòng trên màn hình nhỏ */
    gap: 1rem;
}

.dashboard-card-header-secondary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    /* Cho phép xuống dòng trên màn hình nhỏ */
    gap: 1rem;
}

.dashboard-card-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
}

.dashboard-card-header h3 {
    align-items: center;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.dashboard-card-header .card-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.dashboard-card-header .card-header-actions button {
    background-color: var(--color-surface-soft);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-hard);
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.dashboard-card-header .card-header-actions button:hover {
    background-color: var(--color-primary);
    color: var(--color-text-on-dark);
}

.dashboard-card-header .card-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.card-header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    /* Cho phép xuống dòng trên màn hình nhỏ */
    justify-content: center;
    /* Căn giữa các nút */
    margin-top: 1rem;
    /* Thêm khoảng cách trên cùng */
    margin-bottom: 1.5rem;
    /* Thêm khoảng cách dưới cùng */
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.card-header-actions button {
    background-color: var(--color-surface-soft);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-hard);
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.welcome-title {
    align-items: center;
    text-align: center;
    margin-bottom: 1rem;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.search-input {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    font-size: 0.9rem;
    background-color: var(--color-surface-soft);
    transition: var(--transition-smooth);
    width: 280px;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px hsla(210, 100%, 50%, 0.15);
}

/* Base Grid Container */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 2px));
    gap: 1rem;
    width: 100%;
}

.dashboard-content {
    padding: 1.5rem;
    background-color: var(--color-surface);
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--color-border);
}

/* User Profile Box */
.user-profile-box {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-soft);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--color-border);
}

.avatar-container {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 1rem;
}

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

.avatar-edit-button {
    position: absolute;
    bottom: 0;
    right: 0;
    background-color: var(--color-primary);
    color: var(--color-text-on-dark);
    border: 2px solid var(--color-surface);
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.avatar-edit-button i {
    font-size: 1.2rem;
}

.avatar-edit-button:hover {
    transform: scale(1.1);
}

#profile-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.dashboard-sidebar h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.dashboard-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.dashboard-sidebar li {
    margin-bottom: 1rem;
}

.dashboard-sidebar li a {
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 500;
}

.dashboard-sidebar li a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.dashboard-sidebar .user-profile-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-soft);
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-subtle);
    margin-bottom: 2rem;
}

.avatar-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 1rem auto;
}

#profile-avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid white;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.avatar-container:hover .avatar-edit-button {
    display: flex;
}


.avatar-edit-button {
    position: absolute;
    bottom: 5px;
    right: 5px;
    width: 32px;
    height: 32px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 2px solid white;
    transition: var(--transition-smooth);
}

.avatar-edit-button i {
    font-size: 1.2rem;
}

.avatar-edit-button:hover {
    transform: scale(1.1);
}

#profile-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.profile-role {
    display: inline-block;
    background-color: hsla(210, 100%, 50%, 0.1);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-top: 0.5rem;
    text-transform: capitalize;
}

.profile-email {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
    word-break: break-all;
}

#upload-progress-container {
    margin-top: 1rem;
}

#upload-progress {
    width: 100%;
}

#teacher-actions {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

#teacher-actions .button {
    width: 100%;
    justify-content: flex-start;
    /* Căn icon và chữ về bên trái */
    gap: 0.75rem;
}


/* Main Content */
.dashboard-content .dashboard-header {
    margin-bottom: 2rem;
}

.dashboard-content h1 {
    font-size: 2.2rem;
    font-weight: 800;
}

.dashboard-content .welcome-message {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
}

/* Responsive */
@media (max-width: 1200px) {
    .dashboard-layout {
        grid-template-columns: 280px 1fr;
        /* Giảm chiều rộng sidebar một chút */
    }
}

@media (max-width: 992px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
        /* Chuyển thành 1 cột */
    }

    .dashboard-sidebar {
        position: static;
        /* Bỏ sticky position */
        top: auto;
        grid-row: 1;
        /* Đưa sidebar lên đầu */
    }

    .dashboard-content {
        padding: 1rem;
    }
}

/* Add to the end of css/pages/dashboard.css */
#dashboard-schedule-view {
    margin-top: 1rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-soft);
    padding: 1rem;
}

#dashboard-schedule-view h4 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin: 0 0 0.5rem 0;
}

#dashboard-schedule-view ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#dashboard-schedule-view li {
    font-size: 0.9rem;
    padding: 0.5rem 0;
    border-top: 1px solid var(--color-surface-soft);
}

/* Thêm vào cuối file: css/pages/dashboard.css */

#dashboard-schedule-view h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

.day-schedule-group {
    margin-bottom: 1rem;
}

.day-group-header {
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    background-color: var(--color-surface-soft);
    border-radius: var(--border-radius-hard);
}

.day-schedule-group ul {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
}

.day-schedule-group li {
    display: flex;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}

.day-schedule-group li .session-time {
    font-weight: 600;
    color: var(--color-primary);
    margin-right: 1rem;
    width: 50px;
}

/* Thêm vào cuối file css/pages/schedule.css */

.day-filter-tabs {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.day-filter-tabs .button {
    background-color: var(--color-surface-soft);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    font-weight: 600;
}

.day-filter-tabs .button:hover {
    background-color: hsl(220, 33%, 94%);
    border-color: hsl(220, 25%, 88%);
}

.day-filter-tabs .button.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* --- RESPONSIVE CHO THIẾT BỊ DI ĐỘNG --- */

@media(max-width: 768px) {
    .hero-title-apple {
        font-size: 2.5em;
        letter-spacing: -1px;
    }

    .hero-subtitle-apple {
        font-size: 1.1em;
    }

    .section-title-apple {
        font-size: 2em;
    }
}

.feature-icon {
    font-size: 2em;
}

.feature-title {
    font-size: 1.2em;
}

.feature-text {
    font-size: 0.9em;
}

.classes-grid-apple {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.about-us-content {
    flex-direction: column;
    align-items: center;
}

.about-image,
.about-text {
    min-width: 100%;
    text-align: center;
}

@media (max-width: 768px) {
    .dashboard-layout {
        gap: 1.5rem;
        /* Giảm khoảng cách giữa các khối */
    }

    .dashboard-sidebar {
        position: static;
        /* Bỏ thuộc tính "dính" của sidebar trên di động */
    }

    .user-profile-box {
        padding: 1.5rem;
        /* Giảm padding cho gọn hơn */
    }

    .avatar-container {
        width: 100px;
        height: 100px;
    }

    #profile-name,
    .dashboard-content h1 {
        font-size: 1.8rem;
        /* Giảm kích thước các tiêu đề chính */
    }

    .dashboard-card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .card-header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .search-input {
        width: 100%;
    }

    .date-range-picker {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .date-range-picker .form-group {
        width: 100%;
    }
}

#my-classes-grid .card {
    max-width: 450px;
    margin-left: 0;
    margin-right: auto;
}

.report-list-container {
    margin-top: 2rem;
    background-color: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--border-radius-medium);
    box-shadow: var(--shadow-small);
}

.report-list-container h3 {
    color: var(--color-text-primary);
    margin-bottom: 1rem;
}

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

.report-table {
    width: 100%;
    border-collapse: collapse;
    border-spacing: 0;
    font-size: 0.9rem;
}

.report-table th,
.report-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
}

.report-table th {
    font-weight: bold;
    color: var(--color-text-secondary);
}

.report-table tbody tr:nth-child(even) {
    background-color: var(--color-background-alt);
}

.status-badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: var(--border-radius-pill);
    font-size: 0.8rem;
    font-weight: bold;
}

.status-sent {
    background-color: var(--color-success-light);
    color: var(--color-success-dark);
}

.status-pending {
    background-color: var(--color-warning-light);
    color: var(--color-warning-dark);
}

.status-failed {
    background-color: var(--color-danger-light);
    color: var(--color-danger-dark);
}

.action-buttons button {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    margin-left: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.8;
    transition: opacity var(--transition-smooth);
}

.action-buttons button:hover {
    opacity: 1;
}

.action-buttons i {
    margin-right: 0.2rem;
}

.report-exporter-container {
    background-color: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--border-radius-soft);
    margin-top: 2rem;
    box-shadow: var(--shadow-subtle);
    border: 1px solid var(--color-border);
}

.report-exporter-container h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
}

.report-exporter-container h3 .fa-file-export {
    color: var(--color-primary);
}

.date-range-picker {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
}

.date-range-picker .form-group {
    flex-grow: 1;
    margin: 0;
}

.date-range-picker .form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
}

.date-range-picker input[type="date"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    font-size: 0.95rem;
    background-color: var(--color-surface-soft);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.date-range-picker input[type="date"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px hsla(210, 100%, 50%, 0.15);
}

.date-range-picker button {
    flex-shrink: 0;
    margin-bottom: 0;
    gap: 0.5rem;
}

#export-status {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    min-height: 1.2em;
    font-style: italic;
}

.container--full-width {
    max-width: 100%;
    padding-left: 2rem;
    padding-right: 2rem;
}

.report-pagination-container {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin: 20px 0;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    cursor: pointer;
}

.pagination button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

#report-pagination-container {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
}

#report-pagination-container .pagination {
    display: flex;
    gap: 5px;
}

#report-pagination-container .pagination button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    cursor: pointer;
}

#report-pagination-container .pagination button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

#report-pagination-container .pagination button.disabled {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    /* =========================================
       DASHBOARD MOBILE OPTIMIZATION
       ========================================= */

    /* 1. Global Layout Stacking */
    .dashboard-layout {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .container--full-width {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* 2. Sidebar & Profile */
    .dashboard-sidebar {
        position: static;
        width: 100%;
        order: -1;
        /* Keep at top */
    }

    .user-profile-box {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 1.5rem 1rem;
    }

    .avatar-container {
        width: 80px;
        height: 80px;
        margin-bottom: 0.5rem;
    }

    #profile-name {
        font-size: 1.25rem;
    }

    .profile-email {
        font-size: 0.85rem;
    }

    /* 3. Main Content & Grid */
    .dashboard-content {
        padding: 1rem;
        border: none;
        box-shadow: none;
        background: transparent;
    }

    .dashboard-content .dashboard-header {
        text-align: center;
        margin-bottom: 1.5rem;
    }

    .dashboard-content h1 {
        font-size: 1.5rem;
    }

    /* My Classes Grid - Stack vertically */
    .grid-container#my-classes-grid {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .grid-container#my-classes-grid .glass-card,
    .grid-container#my-classes-grid .card {
        width: 100%;
        max-width: none;
        margin: 0;
    }

    /* 4. Widgets: Stats & Reports */
    .dashboard-card {
        padding: 1rem;
        border-radius: 12px;
    }

    .chart-container {
        height: 250px;
        /* Limit height for mobile */
        position: relative;
    }

    .dashboard-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .dashboard-card-header h2 {
        font-size: 1.2rem;
    }

    .card-header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .card-header-actions input,
    .search-input {
        width: 100%;
    }

    /* 5. Report List - Horizontal Scroll or stacked */
    .report-list-container {
        padding: 1rem;
        margin-top: 1.5rem;
    }

    /* Scrollable table wrapper */
    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 -1rem;
        /* Negative margin to let it bleed to edges */
        padding: 0 1rem;
    }

    .report-table {
        min-width: 600px;
        /* Ensure table has width to scroll */
    }

    /* 6. Teacher Tools (If visible) */
    .report-exporter-container {
        padding: 1rem;
    }

    .date-range-picker {
        flex-direction: column;
    }

    .date-range-picker button {
        width: 100%;
        justify-content: center;
    }
}

#report-pagination-container .pagination button.disabled:hover {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

#report-pagination-container .pagination button:hover:not(.disabled) {
    background: #e0e0e0;
}

#report-pagination-container .pagination button:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

#report-pagination-container .pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#report-pagination-container .pagination button:disabled:hover {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

#report-pagination-container .pagination button:disabled:focus {
    box-shadow: none;
}

#report-pagination-container .pagination button:disabled:active {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

.pagination-button {
    padding: 8px 12px;
    border: 1px solid #ddd;
    background: white;
    cursor: pointer;
}

.pagination-button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pagination-button.disabled {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

.pagination-button.disabled:hover {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

.pagination-button:hover:not(.disabled) {
    background: #e0e0e0;
}

.pagination-button:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.pagination-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-button:disabled:hover {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

.pagination-button:disabled:focus {
    box-shadow: none;
}

.pagination-button:disabled:active {
    background: #f0f0f0;
    color: #ccc;
    cursor: not-allowed;
}

.pagination-button i {
    margin-right: 0.25rem;
}

.question-block:hover {
    box-shadow: var(--shadow-medium);
}

.question-block:active {
    box-shadow: var(--shadow-subtle);
}

.question-block {
    background-color: var(--color-surface-soft);
    padding: 1.5rem;
    border-radius: var(--border-radius-hard);
    margin-bottom: 1.5rem;
    border: 1px solid var(--color-border);
    transition: box-shadow 0.2s ease;
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.question-header h4 {
    margin: 0;
    font-size: 1.1rem;
}

.delete-question-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 1.5rem;
    line-height: 1;
    padding: 2px 8px;
    transition: color 0.2s ease;
}

.delete-question-btn:hover {
    color: var(--color-danger);
}

.delete-question-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(255, 0, 0, 0.25);
}

.delete-question-btn:active {
    color: var(--color-danger-dark);
}

.question-content {
    margin-bottom: 1rem;
    font-size: 1rem;
    color: var(--color-text-primary);
}

.question-content p {
    margin: 0.5rem 0;
}

.question-content ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.question-content ul li {
    margin-bottom: 0.5rem;
}

.question-content ol {
    list-style: decimal;
    padding-left: 1.5rem;
}

.question-content ol li {
    margin-bottom: 0.5rem;
}

.question-content blockquote {
    margin: 1rem 0;
    padding-left: 1rem;
    border-left: 4px solid var(--color-primary);
    color: var(--color-text-secondary);
}

.question-content blockquote p {
    margin: 0;
}

.question-content blockquote ul,
.question-content blockquote ol {
    margin-top: 0.5rem;
}

.question-content blockquote ul li,
.question-content blockquote ol li {
    margin-bottom: 0.25rem;
}

.question-content blockquote ul li::marker,
.question-content blockquote ol li::marker {
    color: var(--color-primary);
}

/* --- RESPONSIVE CHO THIẾT BỊ DI ĐỘNG --- */
@media (max-width: 480px) {

    .container,
    .container--full-width {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .user-profile-box {
        padding: 1rem;
    }

    #profile-name,
    .dashboard-content h1 {
        font-size: 1.5rem;
    }

    .dashboard-card-header h2 {
        font-size: 1.25rem;
    }

    #teacher-actions {
        gap: 0.5rem;
    }

    .button {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

.question-content blockquote ul li::marker {
    font-weight: bold;
}

.question-content blockquote ol li::marker {
    font-weight: bold;
}

.question-content blockquote p {
    margin-bottom: 0.5rem;
}

.question-content blockquote p:last-child {
    margin-bottom: 0;
}

.question-content blockquote ul li:last-child,
.question-content blockquote ol li:last-child {
    margin-bottom: 0;
}

.question-content blockquote ul li::marker,
.question-content blockquote ol li::marker {
    color: var(--color-primary);
}

/* Lớp tiện ích để ẩn phần tử */
.hidden {
    display: none !important;
}

/* === Action Buttons Customization === */
.data-table .btn-delete {
    background-color: var(--color-danger);
    border-color: var(--color-danger);
    color: var(--color-text-on-dark);
}

.data-table .btn-delete:hover {
    background-color: hsl(0, 79%, 55%);
    /* A darker red */
    border-color: hsl(0, 79%, 55%);
    color: var(--color-text-on-dark);
}


/* === MODAL STYLES === */
.modal-overlay {
    display: none;
    /* Ẩn mặc định */
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--color-surface);
    margin: auto;
    padding: 2rem;
    border: 1px solid var(--color-border);
    width: 90%;
    max-width: 700px;
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

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

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-text-primary);
}

.close-modal-btn {
    color: var(--color-text-secondary);
    font-size: 2rem;
    font-weight: bold;
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
    padding: 0;
}

.close-modal-btn:hover,
.close-modal-btn:focus {
    color: var(--color-danger);
    text-decoration: none;
}

.modal-body {
    overflow-y: auto;
    /* Cho phép cuộn khi nội dung dài */
    flex-grow: 1;
    padding-right: 1rem;
    /* Thêm khoảng trống cho thanh cuộn */
}

.modal-body h4 {
    color: var(--color-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-surface-soft);
    padding-bottom: 0.5rem;
}

.modal-body .detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.modal-body .detail-item {
    background-color: var(--color-surface-soft);
    padding: 0.75rem;
    border-radius: var(--border-radius-hard);
    font-size: 0.95rem;
}

.modal-body .detail-item strong {
    display: block;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
}

.modal-body .detail-item.full-span {
    grid-column: 1 / -1;
}

.modal-actions {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }

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

@keyframes slideOut {
    from {
        transform: translateY(0);
        opacity: 1;
    }

    to {
        transform: translateY(-50px);
        opacity: 0;
    }
}

/* Lớp điều khiển animation */
.modal-overlay.is-visible {
    display: flex;
    animation: fadeIn 0.3s ease forwards;
}

.modal-overlay.is-hiding {
    animation: fadeOut 0.3s ease forwards;
}

.modal-overlay.is-visible .modal-content {
    animation: slideIn 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.modal-overlay.is-hiding .modal-content {
    animation: slideOut 0.4s cubic-bezier(0.55, 0.085, 0.68, 0.53) forwards;
}

/* --- TỐI ƯU HÓA MODAL CHO DI ĐỘNG --- */
@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        /* Chiếm nhiều không gian hơn trên màn hình nhỏ */
        padding: 1.5rem;
        /* Giảm padding */
        max-height: 95vh;
        /* Cho phép modal cao hơn */
    }

    .modal-header h2 {
        font-size: 1.25rem;
        /* Giảm kích thước tiêu đề */
    }

    .modal-body {
        padding-right: 0.5rem;
        /* Giảm padding cho thanh cuộn */
    }

    .modal-body .detail-grid {
        grid-template-columns: 1fr;
        /* Chuyển thành 1 cột */
        gap: 0.75rem;
    }

    .modal-actions {
        flex-direction: column;
        /* Xếp chồng các nút */
        gap: 0.75rem;
    }

    .modal-actions .button {
        width: 100%;
        /* Các nút chiếm toàn bộ chiều rộng */
    }
}

.form-control-small {
    padding: 0.4rem 0.6rem;
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    background-color: var(--color-surface-soft);
}

.form-control-small:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--color-primary-light);
}

.form-control-small::placeholder {
    color: var(--color-text-secondary);
    opacity: 0.8;
}

.form-control-small:disabled {
    background-color: var(--color-surface-soft);
    color: var(--color-text-secondary);
    cursor: not-allowed;
}

.form-control-small:disabled:focus {
    outline: none;
    border-color: var(--color-border);
    box-shadow: none;
}

.chart-container {
    position: relative;
    height: 350px;
    /* Chiều cao mặc định cho biểu đồ */
    width: 100%;
}

.chart-container .chartjs-render-monitor {
    width: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều rộng */
    height: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều cao */
}

.chart-container.no-data {
    position: relative;
    height: 350px;
    /* Chiều cao mặc định cho biểu đồ khi không có dữ liệu */
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--color-surface-soft);
}

.chart-container.no-data .chartjs-render-monitor {
    display: none;
    /* Ẩn biểu đồ khi không có dữ liệu */
}

.chart-container.no-data .chart-no-data-message {
    display: block;
    /* Hiển thị thông báo khi không có dữ liệu */
}

.chart-container.no-data .chart-no-data-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-text-secondary);
    font-style: italic;
    font-size: 1.2rem;
    text-align: center;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-small);
}

.chart-container.no-data .chart-no-data-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-text-secondary);
    font-style: italic;
    font-size: 1.2rem;
    text-align: center;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-small);
}

.chart-container canvas {
    cursor: pointer;
    /* Thêm con trỏ tay khi di chuột qua biểu đồ */
}

.chart-month-filter {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.chart-month-filter select {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    font-size: 0.9rem;
    background-color: var(--color-surface-soft);
    transition: var(--transition-smooth);
}

.chart-month-filter select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px hsla(210, 100%, 50%, 0.15);
}

.chart-month-filter select option {
    padding: 0.5rem;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
}

.chart-no-data-message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-text-secondary);
    font-style: italic;
}

.chart-container .chart-no-data-message {
    display: none;
    /* Ẩn mặc định */
}

.chart-container.no-data .chart-no-data-message {
    display: block;
    /* Hiển thị khi không có dữ liệu */
}

.chart-container canvas {
    width: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều rộng */
    height: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều cao */
}

.chart-container .chartjs-render-monitor {
    width: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều rộng */
    height: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều cao */
}

.chart-container .chartjs-render-monitor {
    width: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều rộng */
    height: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều cao */
}

.chart-container .chartjs-render-monitor {
    width: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều rộng */
    height: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều cao */
}

.chart-container .chartjs-render-monitor {
    width: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều rộng */
    height: 100% !important;
    /* Đảm bảo biểu đồ chiếm toàn bộ chiều cao */
}

/* --- MOBILE DASHBOARD OPTIMIZATION --- */
@media (max-width: 600px) {
    .dashboard-layout {
        display: block;
        padding: 0;
        gap: 0;
    }

    .dashboard-sidebar {
        width: 100%;
        min-width: 0;
        max-width: 100vw;
        padding: 0.5rem 0.5rem 0 0.5rem;
        box-shadow: none;
        border-radius: 0;
        position: static;
        top: unset;
        z-index: 10;
    }

    .user-profile-box {
        padding: 1rem 0.5rem;
        margin-bottom: 1rem;
        border-radius: var(--border-radius-soft);
        box-shadow: var(--shadow-small);
    }

    .dashboard-content {
        padding: 0.5rem 0.25rem;
        border-radius: 0;
        box-shadow: none;
        border: none;
    }

    .dashboard-header h1,
    #profile-name {
        font-size: 1.2rem;
    }

    .dashboard-header h2 {
        font-size: 1rem;
    }

    .dashboard-card,
    .report-list-container,
    .report-exporter-container {
        padding: 0.75rem 0.25rem;
        border-radius: var(--border-radius-soft);
        box-shadow: var(--shadow-small);
    }

    .table-wrapper {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .data-table,
    .report-table {
        font-size: 0.85rem;
        min-width: 600px;
    }

    .search-input,
    .form-control-small {
        width: 100%;
        font-size: 1rem;
    }

    .card-header-actions {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        width: 100%;
    }

    .dashboard-card-header,
    .dashboard-card-header-secondary {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .avatar-container {
        width: 70px;
        height: 70px;
    }

    .dashboard-sidebar .user-profile-box {
        padding: 1rem 0.5rem;
    }

    .dashboard-sidebar h2 {
        font-size: 1.1rem;
    }

    .dashboard-sidebar li {
        margin-bottom: 0.5rem;
    }

    .dashboard-sidebar li a {
        font-size: 1rem;
    }

    .dashboard-card-header h2,
    .dashboard-card-header h3 {
        font-size: 1.1rem;
    }

    .pagination,
    #report-pagination-container .pagination {
        gap: 2px;
    }

    .pagination button,
    #report-pagination-container .pagination button {
        padding: 6px 8px;
        font-size: 0.9rem;
    }

    .scroll-buttons {
        right: 10px;
        bottom: 10px;
    }
}

/* =========================================================================
   PREMIUM DASHBOARD UI ADDITIONS 
   ========================================================================= */

/* Premium Card with Glassmorphism Effect */
.premium-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05), inset 0 0 0 1px rgba(255, 255, 255, 0.5);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
}

.premium-card::before {
    content: "";
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.8), transparent);
    transform: skewX(-20deg);
    transition: left 0.7s ease;
    z-index: 1;
    pointer-events: none;
}

.premium-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--color-primary-light, #7681d4);
}

.premium-card:hover::before {
    left: 200%;
}

/* Specific styling for Mock Exam Status */
#mock-exam-status-card {
    border-left: 6px solid var(--color-primary);
    background: linear-gradient(135deg, rgba(255, 255, 255, 1) 0%, rgba(240, 247, 255, 0.9) 100%);
}

.dashboard-card-info {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--color-text-primary);
}

/* Gradient Text for Headings */
.gradient-text {
    background: linear-gradient(45deg, var(--color-primary), #00bcd4);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    font-weight: 800;
}

/* Reports container structure */
.reports-premium-layout {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

/* Modern inputs */
.modern-input {
    border: 2px solid #e0e6ed;
    border-radius: 8px;
    padding: 0.6rem 1rem;
    transition: all 0.3s ease;
    background: #f8fafc;
    font-family: inherit;
}

.modern-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(50, 61, 151, 0.1);
    background: #ffffff;
    outline: none;
}

/* Modern clean modal */
.premium-modal {
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}