/* Admin Panel Styles */

/* New Root Variables for Modern Theme */
:root {
    --admin-bg: linear-gradient(135deg, hsl(210, 80%, 98%), hsl(200, 80%, 96%));
    --sidebar-bg: rgba(255, 255, 255, 0.6);
    --card-bg: rgba(255, 255, 255, 0.7);
    --border-color-translucent: rgba(0, 0, 0, 0.08);
    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-strong: 0 8px 30px rgba(0, 0, 0, 0.1);
    --backdrop-blur: 12px;
}

/* New Background Element */
.admin-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--admin-bg);
    z-index: -1;
}

/* Layout */
.admin-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    /* Glassmorphism Effect */
    background: var(--sidebar-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-bottom: 1px solid var(--border-color-translucent);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 1rem;
    /* Add padding here */
}

.admin-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 1rem;
    /* Adjust padding */
    max-width: none;
    flex-wrap: nowrap;
    /* Prevent wrapping */
    flex-grow: 1;
    /* Allow content to fill space */
}

.admin-logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.admin-logo .logo-img {
    height: 40px;
    width: auto;
}

.admin-logo h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.admin-user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
    /* Prevent user info from shrinking */
}

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

.user-details {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.user-details span:first-child {
    font-weight: 600;
    color: var(--color-text-primary);
}

.user-details span:last-child {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.logout-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius-hard);
    transition: var(--transition-smooth);
}

.logout-btn:hover {
    background: var(--color-surface-soft);
    color: var(--color-danger);
}

/* Notification System */
.admin-notification-wrapper {
    position: relative;
    margin-right: 1rem;
}

.notification-bell {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    position: relative;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.notification-bell:hover {
    background: var(--color-surface-soft);
    color: var(--color-primary);
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    background-color: var(--color-danger);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 0.7rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    border: 2px solid var(--sidebar-bg);
    /* Match header background */
}

/* Add a subtle pulse animation to the badge when it appears */
@keyframes pulse-badge {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.25);
    }

    100% {
        transform: scale(1);
    }
}

.notification-panel {
    position: absolute;
    top: calc(100% + 15px);
    right: 0;
    width: 360px;
    background: var(--color-surface);
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-strong);
    border: 1px solid var(--color-border);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 1100;
}

.notification-badge.new {
    /* Apply the animation when new notifications arrive */
    animation: pulse-badge 0.5s ease-out;
}

.notification-panel.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.class-card-footer .btn-warning {
    background-color: hsl(39, 100%, 50%);
    /* Orange */
    color: white;
}

.class-card-footer .btn-warning:hover {
    background-color: hsl(39, 100%, 45%);
}

.class-card-footer .btn-small {
    padding: 0.5rem 0.75rem;
    /* Make buttons a bit smaller */
    font-size: 1rem;
    /* Make icons a bit larger */
}

.notification-panel-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border-color-translucent);
    background-color: var(--color-surface-soft);
}

.notification-panel-footer .btn {
    width: 100%;
}

.notification-panel-footer .setting-description {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin: 0;
    text-align: center;
    padding: 0.5rem 0;
}

.btn-clear-all {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-hard);
    transition: var(--transition-smooth);
}

.notification-item .user-avatar-sm {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.btn-clear-all:hover {
    background-color: var(--color-surface-soft);
    color: var(--color-danger);
}

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

.notification-panel-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.admin-layout {
    display: flex;
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

.admin-sidebar {
    width: 280px;
    /* Glassmorphism Effect */
    background: var(--sidebar-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-right: 1px solid var(--border-color-translucent);
    padding: 2rem 0;
    overflow-y: auto;
    position: fixed;
    height: calc(100vh - 70px);
    transition: transform 0.3s ease-in-out;
}

.admin-main {
    flex: 1;
    margin-left: 280px;
    padding: 2rem;
    background: transparent;
    /* Let the new background show through */
    min-height: calc(100vh - 70px);
}

/* Navigation */
.admin-nav {
    padding: 0 1rem;
}

.nav-section {
    margin-bottom: 2rem;
}

.nav-section h3 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 1rem 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--border-radius-soft);
    margin-bottom: 0.25rem;
    transition: var(--transition-smooth);
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-text-primary);
}

.nav-item.active {
    background: linear-gradient(90deg, var(--color-primary), hsl(210, 100%, 60%));
    color: white;
    box-shadow: 0 4px 15px -5px var(--color-primary);
}

.nav-item.active i {
    transform: scale(1.1);
}

.nav-item i {
    width: 20px;
    text-align: center;
}


/* Sections */
.admin-section {
    display: none;
}

.admin-section.active {
    display: block;
}

.section-header {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-header h2 {
    margin: 0;
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--color-text-primary);
}

.section-header p {
    margin: 0.5rem 0 0 0;
    color: var(--color-text-secondary);
}

.header-actions {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-soft);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-size: 0.875rem;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: white;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-soft);
}

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

.btn-danger:hover {
    background: hsl(0, 79%, 55%);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.5);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover,
.chart-container:hover,
.recent-activities:hover,
.settings-card:hover,
.payroll-main-controls:hover,
.payroll-stats-main-card:hover,
.history-section.card:hover,
.fee-notice-step.card:hover,
.fee-notice-preview.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-strong);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--color-primary), hsl(210, 100%, 65%));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.stat-content h3 {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.stat-content p {
    margin: 0.25rem 0 0 0;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* Charts */
.dashboard-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.chart-container {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color-translucent);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* Đảm bảo các phần tử con không tràn ra ngoài */
}

.payroll-main-controls,
.payroll-stats-main-card,
.history-section.card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color-translucent);
}

.chart-container .chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color-translucent);
    background-color: rgba(255, 255, 255, 0.5);
    /* Nền mờ nhẹ cho header */
}

.chart-container .chart-body {
    padding: 1.5rem;
    flex-grow: 1;
    /* Cho phép canvas co giãn */
}



.chart-container h3 {
    margin: 0 0 1.5rem 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.chart-container canvas {
    max-height: 300px;
    /* Giới hạn chiều cao tối đa của biểu đồ */
    width: 100% !important;
    /* Đảm bảo canvas luôn vừa với container */
    height: auto !important;
}

/* Tables */
.table-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-soft);
    font-size: 0.875rem;
}

.filter-controls {
    display: flex;
    gap: 1rem;
}

.filter-controls select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-soft);
    font-size: 0.875rem;
    background: var(--color-surface);
}

.table-container {
    background: transparent;
    /* Nền của container sẽ trong suốt */
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.admin-table {
    width: 100%;
    border-collapse: separate;
    /* QUAN TRỌNG: Cho phép border-spacing */
    border-spacing: 0 0.75rem;
    /* Chỉ tạo khoảng cách dọc giữa các hàng */
}

.admin-table th,
.admin-table td {
    padding: 1.25rem;
    text-align: left;
    vertical-align: middle;
}

.admin-table th {
    background: transparent;
    font-weight: 500;
    /* Giảm độ đậm một chút */
    color: var(--color-text-secondary);
    /* Màu chữ phụ */
    font-size: 0.875rem;
    text-transform: uppercase;
    /* VIẾT HOA tiêu đề */
    letter-spacing: 0.5px;
}

.admin-table td {
    color: var(--color-text-secondary);
    background: var(--card-bg);
    /* Nền trắng mờ cho mỗi hàng */
    border: 1px solid var(--border-color-translucent);
    /* Viền mờ */
    border-width: 1px 0;
    /* Chỉ có viền trên và dưới */
}

.admin-table tr {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    /* Hiệu ứng mượt mà */
}

.admin-table tr:hover td {
    transform: translateY(-3px);
    /* Nhấc hàng lên một chút */
    box-shadow: var(--shadow-medium);
    /* Đổ bóng rõ hơn */
    background: rgba(255, 255, 255, 0.9);
    /* Nền sáng hơn khi hover */
}


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

/* Rounded corners for first and last cells in a row */
.admin-table td:first-child {
    border-left: 1px solid var(--border-color-translucent);
    /* Thêm lại viền trái */
    border-radius: var(--border-radius-soft) 0 0 var(--border-radius-soft);
}

.admin-table td:last-child {
    border-right: 1px solid var(--border-color-translucent);
    /* Thêm lại viền phải */
    border-radius: 0 var(--border-radius-soft) var(--border-radius-soft) 0;
}



/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
}

.pagination-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text-primary);
    border-radius: var(--border-radius-hard);
    cursor: pointer;
    transition: var(--transition-smooth);
    font-weight: 600;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--color-surface-soft);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

#users-page-info {
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 0 0.5rem;
}

/* --- NEW: Finance Section Redesign --- */

#finance-section .section-header {
    border-bottom: 1px solid var(--border-color-translucent);
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
}

.finance-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.summary-card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color-translucent);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.summary-card.income {
    border-left: 4px solid var(--color-success);
}

.summary-card.expense {
    border-left: 4px solid var(--color-danger);
}

.summary-card.profit {
    border-left: 4px solid var(--color-primary);
}

.summary-card h3 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-card p {
    margin: 0;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

/* Filters */
.reports-filters,
.finance-filters,
.payroll-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem 2rem;
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color-translucent);
}

.payroll-card-v2 {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color-translucent);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.payroll-card-v2:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-strong);
}

.payroll-card-v2.sent {
    opacity: 0.85;
    background: rgba(230, 240, 250, 0.4);
    border-color: rgba(0, 123, 255, 0.2);
}

.payroll-card-v2-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5;
    border-bottom: 1px solid var(--border-color-translucent);
}

.payroll-card-v2-left .user-avatar-sm {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.payroll-card-v2-header .user-avatar-sm {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}


.payroll-summary {
    margin-top: 2rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-surface);
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-subtle);
    text-align: right;
}

.payroll-card-v2-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.payroll-card-v2-total p {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.payroll-card-v2-footer {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color-translucent);
    background: rgba(0, 0, 0, 0.02);
}

.payroll-card-v2-left .teacher-info {
    display: flex;
    flex-direction: column;
}

.payroll-card-v2-left .teacher-name {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.payroll-card-v2-header .teacher-name {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.payroll-card-v2-left .status-badge {
    margin-top: 0.25rem;
    font-size: 0.75rem;
    align-self: flex-start;
    /* Align badge to the left */
}

.payroll-card-v2-right .total-amount {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    white-space: nowrap;
}

/* Details section */
.payroll-card-v2-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    padding: 0 1rem 1rem 1rem;
    font-size: 0.85rem;
}

.payroll-card-v2-details .detail-item {
    background-color: var(--color-surface-soft);
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius-hard);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.payroll-card-v2-details .detail-item i {
    color: var(--color-text-secondary);
    width: 16px;
    text-align: center;
}

.payroll-card-v2-details .detail-item span {
    color: var(--color-text-secondary);
}

.payroll-card-v2-details .detail-item strong {
    margin-left: auto;
    color: var(--color-text-primary);
    font-weight: 600;
}

.payroll-card-v2-details .detail-item.bonus i,
.payroll-card-v2-details .detail-item.bonus strong {
    color: var(--color-success);
}

.payroll-card-v2-details .detail-item.deduction i,
.payroll-card-v2-details .detail-item.deduction strong {
    color: var(--color-danger);
}

.payroll-card-v2-footer .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
}

/* Footer */
.payroll-card-v2-footer {
    padding: 0.75rem 1rem;
    background-color: rgba(0, 0, 0, 0.02);
    border-top: 1px solid var(--border-color-translucent);
    margin-top: auto;
    display: flex;
    gap: 0.75rem;
}

.payroll-card-v2-footer .btn {
    flex: 1;
}

/* Payroll Cards Container */
.payroll-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Individual Payroll Card */
.payroll-card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.5);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    border-bottom: 1px solid var(--border-color-translucent);
}

.payroll-card-teacher-name {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.payroll-card-body {
    padding: 1.25rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.payroll-card-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.payroll-card-details p {
    display: flex;
    justify-content: space-between;
    margin: 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.payroll-card-details p span:last-child {
    font-weight: 500;
    color: var(--color-text-primary);
}

.payroll-card-total {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color-translucent);
    text-align: right;
}

.payroll-card-total p {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.payroll-card-footer {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color-translucent);
    background: rgba(0, 0, 0, 0.02);
}

/* Payroll Summary Footer */
.payroll-summary {
    margin-top: 2.5rem;
    padding: 2rem;
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.5);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.payroll-summary h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.payroll-summary span {
    color: var(--color-primary);
    font-weight: 700;
}

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

.payroll-summary .btn-success:hover {
    background-color: hsl(145, 63%, 35%);
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.3);
}

.payroll-class-details {
    list-style-type: none;
    padding-left: 0;
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.payroll-class-details li {
    padding: 4px 0;
    border-bottom: 1px solid var(--color-border);
}

.payroll-class-details li:last-child {
    border-bottom: none;
}

.filter-group,
.date-filter,
.teacher-filter {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label,
.date-filter label,
.teacher-filter label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.filter-group input,
.filter-group select,
.date-filter input,
.teacher-filter select {
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    font-size: 0.875rem;
    background: var(--color-surface);
}

.form-control-small {
    padding: 0.5rem;
    font-size: 0.875rem;
    width: 120px;
    /* Adjust width as needed */
    text-align: right;
}

.payroll-modal-summary {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: right;
}

.payroll-modal-summary h4 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
}

.payroll-modal-summary span {
    color: var(--color-primary);
}

/* Schedule */
.schedule-controls {
    display: flex;
    align-items: end;
    gap: 2rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.schedule-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1rem;
    overflow: hidden;
}

.schedule-day {
    background: var(--card-bg);
    padding: 1rem;
    min-height: 200px;
    border-radius: 16px;
}

.schedule-day-header {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    text-align: center;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color-translucent);
}

.view-switcher {
    display: flex;
    gap: 0.5rem;
    background-color: var(--color-surface-soft);
    padding: 0.5rem;
    border-radius: var(--border-radius-hard);
}

.view-switcher .btn {
    background-color: transparent;
    border: none;
    box-shadow: none;
}

.view-switcher .btn.active {
    background-color: var(--color-surface);
    box-shadow: var(--shadow-subtle);
    color: var(--color-primary);
}

/* Monthly Calendar Styles */
.schedule-grid-month {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
    border: 1px solid var(--border-color-translucent);
    padding: 0.5rem;
    background-color: var(--card-bg);
    border-radius: 16px;
}

.month-day-header {
    text-align: center;
    font-weight: 600;
    padding: 0.75rem 0;
    color: var(--color-text-secondary);
}

.month-day-cell {
    border: 1px solid var(--border-color-translucent);
    border-radius: var(--border-radius-hard);
    min-height: 120px;
    padding: 0.5rem;
    background-color: var(--color-surface);
    transition: background-color 0.2s ease;
}

.month-day-cell.other-month {
    background-color: var(--color-surface-soft);
    opacity: 0.6;
}

.month-day-number {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Day Details Modal */
.day-details-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Ensure schedule cards inside the modal look good */
.day-details-list .schedule-card {
    margin-bottom: 0;
    /* Remove bottom margin as we use gap */
    border-left-width: 5px;
    /* Make the left border more prominent */
}


.schedule-card {
    background: white;
    border-radius: var(--border-radius-soft);
    padding: 1rem;
    margin-bottom: 0.75rem;
    /* Spacing between cards */
    box-shadow: var(--shadow-subtle);
    border-left: 5px solid var(--color-primary);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* Styles for cancelled schedules */
.schedule-card.cancelled {
    background-color: #f8f9fa;
    /* Lighter background */
    opacity: 0.6;
}

.schedule-card.cancelled .schedule-card-info h4,
.schedule-card.cancelled .schedule-card-info p {
    text-decoration: line-through;
    color: var(--color-text-secondary);
}

.schedule-card .btn-reactivate-schedule {
    overflow: hidden;
}

.schedule-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.schedule-card h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.schedule-card-info h4 .confirmed-icon {
    color: var(--color-success);
    font-size: 0.8em;
    margin-left: 0.5rem;
    vertical-align: middle;
    opacity: 0.9;
}

.schedule-tc-badge {
    display: inline-block;
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 0.4rem;
    vertical-align: middle;
    letter-spacing: 0.5px;
    line-height: 1.2;
    text-transform: uppercase;
    box-shadow: 0 1px 3px rgba(255, 107, 53, 0.3);
}

.schedule-card p {
    margin: 0.25rem 0;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.schedule-card-actions {
    margin-top: 1rem;
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* Classes Grid */
.classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.class-card {
    background: var(--card-bg);
    /* Re-unified */
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: var(--border-radius-soft);
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
}

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

.class-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color-translucent);
}

.class-card-icon-wrapper {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), hsl(210, 100%, 65%));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.class-card-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.class-card-body {
    padding: 1.5rem;
    flex-grow: 1;
}

.class-card-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.class-card-info:last-child {
    margin-bottom: 0;
}

.class-card-info i {
    color: var(--color-primary);
    width: 16px;
    text-align: center;
}

.class-card-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color-translucent);
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.grade-group {
    margin-bottom: 3rem;
}

.grade-group h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}

.subject-group {
    margin-bottom: 2rem;
}

.subject-group h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding-left: 1rem;
    border-left: 3px solid var(--color-primary);
}

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.settings-card {
    background: var(--card-bg);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.settings-card h3 {
    margin: 0 0 1.5rem 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.setting-item {
    margin-bottom: 1.5rem;
}

.setting-item label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.875rem;
}

.setting-item input[type="text"],
.setting-item input[type="email"],
.setting-item input[type="tel"],
.setting-item input[type="number"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    font-size: 0.875rem;
}

.setting-item input[type="checkbox"] {
    margin-right: 0.5rem;
}

/* Activities */
/* Visitor Tracking Dashboard Widget */
.visitor-dashboard-widget {
    background: var(--card-bg);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.visitor-dashboard-widget:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-strong);
}

.visitor-dashboard-widget h3 {
    margin: 0 0 1.5rem 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
}

.visitor-stats-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .visitor-stats-container {
        grid-template-columns: 1fr;
    }
}

.admin-stat-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    border-radius: 16px;
    background: var(--color-surface-soft);
    border: 1px solid var(--border-color-translucent);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.admin-stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0.1;
    z-index: 0;
}

.admin-stat-card.live {
    background: linear-gradient(135deg, #f0fdf4, #ffffff);
    border: 1px solid #bbf7d0;
    box-shadow: 0 4px 20px -4px rgba(34, 197, 94, 0.15);
}

.admin-stat-card.live::before {
    background: radial-gradient(circle at top right, rgba(34, 197, 94, 0.4) 0%, transparent 60%);
}

.admin-stat-card.total {
    background: linear-gradient(135deg, #eef2ff, #ffffff);
    border: 1px solid #c7d2fe;
    box-shadow: 0 4px 20px -4px rgba(99, 102, 241, 0.15);
}

.admin-stat-card.total::before {
    background: radial-gradient(circle at bottom left, rgba(99, 102, 241, 0.4) 0%, transparent 60%);
}

.admin-stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    position: relative;
    z-index: 1;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
}

.admin-stat-card.live .admin-stat-icon {
    color: #10b981;
    border: 1px solid #d1fae5;
    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.1);
}

.admin-stat-card.total .admin-stat-icon {
    color: #6366f1;
    border: 1px solid #e0e7ff;
    box-shadow: 0 4px 10px rgba(99, 102, 241, 0.1);
}

.admin-stat-info {
    position: relative;
    z-index: 1;
}

.admin-stat-info span {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.admin-stat-info h4 {
    margin: 0.25rem 0 0 0;
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-text-primary);
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.admin-stat-info h4.fetching {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.visitor-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 10px;
}

.visitor-table th {
    background: var(--color-surface-soft);
    color: var(--color-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    padding: 14px 16px;
    border-bottom: 2px solid var(--border-color-translucent);
}

.visitor-table td {
    padding: 16px;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-color-translucent);
}

.visitor-table tr:hover td {
    background: var(--color-surface-soft);
}

.pulse-icon {
    animation: icon-pulse 2s infinite;
}

@keyframes icon-pulse {
    0% { transform: scale(0.9); opacity: 0.8; }
    50% { transform: scale(1.15); opacity: 1; filter: drop-shadow(0 0 5px currentColor); }
    100% { transform: scale(0.9); opacity: 0.8; }
}

.admin-stat-info span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.admin-stat-info h4 {
    margin: 0.25rem 0 0 0;
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-text-primary);
}

.admin-stat-info h4.fetching {
    font-size: 1.25rem;
    color: var(--color-text-muted);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    overflow: auto;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.active {
    display: flex;
    /* This is correct */
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: rgba(255, 255, 255, 0.75);
    /* Giảm độ trong suốt một chút để dễ đọc hơn */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius-soft);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, 0.2);
    /* Thêm viền trắng mờ */
    /* Thêm hiệu ứng chuyển động cho hộp thoại */
    transform: scale(0.95) translateY(10px);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
    opacity: 1;
}

.modal-content.large {
    max-width: 1500px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    /* Giảm padding một chút */
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--border-radius-hard);
    transition: var(--transition-smooth);
}

.modal-close:hover {
    background: var(--color-surface-soft);
    color: var(--color-text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-body form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    /* Replace margin-bottom on form-group */
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color-translucent);
}

.form-group {
    margin-bottom: 0;
    /* Replaced by gap in form */
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea,
.form-control {
    /* Add a general form control class */
    width: 100%;
    /* This is fine */
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-hard);
    font-size: 0.9rem;
    /* Slightly larger font */
    background: var(--color-surface-soft);
    /* Subtle background color */
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary-dark);
    box-shadow: 0 0 0 3px hsla(210, 100%, 50%, 0.2);
    outline: none;
    background-color: var(--color-surface);
}

/* --- NEW: Sample Reasons in Modal --- */
.sample-reasons-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.sample-reason-btn {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
}

/* --- NEW: Inline Add Student Form in Modal --- */
.add-student-to-class-inline-form {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color-translucent);
}

.add-student-to-class-inline-form h4 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 1rem 0;
    color: var(--color-text-primary);
}

.form-status {
    font-size: 0.875rem;
    margin-top: 1rem;
    min-height: 1.2rem;
}

/* New: Grid layout for forms */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
    /* Make this group span all columns */
}

/* New: Inline form groups */
.form-group-inline {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

/* --- NEW: General Notification Modal --- */
.modal-content.small {
    max-width: 450px;
}

#notification-modal-body {
    text-align: center;
    padding: 2rem 1.5rem;
}

.notification-modal-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1;
}

.notification-modal-icon .fa-check-circle {
    color: var(--color-success);
}

.notification-modal-icon .fa-times-circle {
    color: var(--color-danger);
}

.notification-modal-icon .fa-exclamation-triangle {
    color: var(--color-warning);
}

.notification-modal-icon .fa-info-circle {
    color: var(--color-primary);
}

#notification-modal-message {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
}

#notification-modal-header.success {
    background-color: hsla(145, 63%, 42%, 0.1);
}

#notification-modal-header.error {
    background-color: hsla(0, 79%, 63%, 0.1);
}

#notification-modal-header.warning {
    background-color: hsla(45, 100%, 51%, 0.1);
}

#notification-modal-header.info {
    background-color: hsla(210, 100%, 50%, 0.1);
}

/* --- END: General Notification Modal --- */



/* Status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
}

.status-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

/* Positive statuses: Active, Approved, Completed, Sent */
.status-active,
.status-approved,
.status-completed,
.status-sent {
    color: hsl(145, 63%, 35%);
    background-color: hsla(145, 63%, 42%, 0.1);
}

.status-active::before,
.status-approved::before,
.status-completed::before,
.status-sent::before {
    background-color: hsl(145, 63%, 42%);
}

/* Negative statuses: Inactive, Rejected, Failed */
.status-inactive,
.status-rejected,
.status-failed {
    color: hsl(0, 79%, 55%);
    background-color: hsla(0, 79%, 63%, 0.1);
}

.status-inactive::before,
.status-rejected::before,
.status-failed::before {
    background-color: hsl(0, 79%, 63%);
}

/* Neutral/Warning status: Pending */
.status-pending {
    color: hsl(45, 100%, 40%);
    background-color: hsla(45, 100%, 51%, 0.1);
}

.status-pending::before {
    background-color: hsl(45, 100%, 51%);
}

/* Button to view rejection reason, placed inside the badge */
.btn-view-rejection {
    background: none;
    border: none;
    color: inherit;
    /* Inherit color from the badge (e.g., red for rejected) */
    cursor: pointer;
    padding: 0;
    margin: 0 0 0 0.5rem;
    /* Add some space to the left */
    line-height: 1;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.btn-view-rejection:hover {
    opacity: 1;
}

.rejection-reason-display {
    background-color: var(--color-surface-soft);
    padding: 1rem;
    border-radius: var(--border-radius-hard);
    min-height: 80px;
    white-space: pre-wrap;
    /* Respect newlines and spaces */
    line-height: 1.6;
    color: var(--color-text-primary);
}

/* Transaction Types in table */
.admin-table td.income {
    color: var(--color-success);
    font-weight: 600;
}

.admin-table td.expense {
    color: var(--color-danger);
    font-weight: 600;
}


/* Sidebar Toggle & Overlay */
.sidebar-toggle-btn {
    display: none;
    /* Hide on desktop by default */
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-primary);
    cursor: pointer;
    z-index: 1001;
    padding: 0.5rem;
    border-radius: var(--border-radius-hard);
}

.sidebar-toggle-btn:hover {
    background: var(--color-surface-soft);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 998;
    /* Below sidebar, above content */
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Responsive */
@media (max-width: 1024px) {
    .admin-sidebar {
        width: 250px;
    }
}

/* ========================================================================= */
/* ===== 13. EVENT MANAGEMENT (NEW) ===== */
/* ========================================================================= */

.event-management-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.event-form-container,
.event-preview-container {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-color-translucent);
    overflow: hidden;
}

.event-form-container {
    max-height: 80vh;
    overflow-y: auto;
}

.event-preview-container {
    position: sticky;
    top: 20px;
}

.event-form-container .card-body,
.event-preview-container .card-body {
    padding: 1.5rem;
}

.event-form-container .card-header,
.event-preview-container .card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color-translucent);
    background-color: rgba(255, 255, 255, 0.5);
}

.event-form-container h3,
.event-preview-container h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}

#event-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

#event-status {
    font-weight: 600;
    padding: 0.75rem;
    border-radius: var(--border-radius-hard);
    text-align: center;
}

#event-status:not(:empty) {
    margin-top: 1rem;
}

#event-status[style*="color: green"] {
    background-color: hsla(145, 63%, 42%, 0.1);
    color: hsl(145, 63%, 35%);
}

#event-status[style*="color: red"] {
    background-color: hsla(0, 79%, 63%, 0.1);
    color: hsl(0, 79%, 55%);
}

#event-status[style*="color: orange"] {
    background-color: hsla(45, 100%, 51%, 0.1);
    color: hsl(45, 100%, 40%);
}


@media (max-width: 768px) {
    .event-management-layout {
        grid-template-columns: 1fr;
    }

    .event-preview-container {
        position: static;
    }

    .event-form-container {
        max-height: none;
    }
}

/* ========================================================================= */
/* ===== 14. SOẠN THẢO VĂN BẢN HÀNH CHÍNH (NGHỊ ĐỊNH 30) ===== */
/* ========================================================================= */

.doc-split-layout {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.doc-control-panel {
    flex: 0 0 450px;
    position: sticky;
    top: 90px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
}

.ai-draft-group {
    background: linear-gradient(to right, rgba(132, 94, 194, 0.05), rgba(214, 93, 177, 0.05));
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px dashed #845ec2;
}

.ai-draft-group label {
    color: #845ec2;
    font-weight: 600;
}

.doc-preview-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    background: rgba(0, 0, 0, 0.05);
    padding: 2rem;
    border-radius: 16px;
    overflow-x: auto;
}

/* A4 Paper Simulation */
.a4-paper {
    width: 210mm;
    min-height: 297mm;
    padding: 20mm 20mm 20mm 30mm; /* Top: 2cm, Right: 2cm, Bottom: 2cm, Left: 3cm */
    background: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    font-family: "Times New Roman", Times, serif;
    font-size: 14pt; /* ~13-14pt theo NĐ30 */
    line-height: 1.5;
    color: black;
    box-sizing: border-box;
}

.a4-paper p {
    margin: 0 0 6pt 0;
}

.doc-header-table {
    width: 100%;
    margin-bottom: 20px;
}

.doc-header-table td {
    vertical-align: top;
    text-align: center;
    border: none;
    background: transparent;
    padding: 0;
}

.doc-header-left {
    width: 40%;
}
.doc-header-right {
    width: 60%;
}

.doc-co-quan {
    text-transform: uppercase;
    font-size: 13pt;
}
.doc-trung-tam {
    text-transform: uppercase;
    font-weight: bold;
    font-size: 13pt;
}
.doc-line-left {
    width: 40%;
    border-top: 1px solid black;
    margin: 5px auto;
}
.doc-so-ky-hieu {
    font-size: 13pt;
}

.doc-quoc-hieu {
    font-weight: bold;
    font-size: 13pt;
}
.doc-tieu-ngu {
    font-weight: bold;
    font-size: 14pt;
}
.doc-line-right {
    width: 60%;
    border-top: 1px solid black;
    margin: 5px auto 10px auto;
}
.doc-dia-danh {
    font-size: 14pt;
    font-style: italic;
    text-align: right;
    margin-right: 15px;
}

.doc-title-type {
    text-align: center;
    font-weight: bold;
    font-size: 14pt;
    text-transform: uppercase;
    margin-top: 20px;
    margin-bottom: 5px;
}
.doc-title-content {
    text-align: center;
    font-size: 14pt;
    margin-bottom: 20px;
}

.doc-bases {
    font-size: 14pt;
    margin-bottom: 15px;
}
.doc-bases p {
    text-indent: 1cm;
    font-style: italic;
    margin-bottom: 0;
}

.doc-body-content {
    font-size: 14pt;
    text-align: justify;
}
.doc-body-content p {
    text-indent: 1cm;
    margin-bottom: 10px;
}

.doc-footer-table {
    width: 100%;
    margin-top: 30px;
}
.doc-footer-table td {
    vertical-align: top;
    border: none;
    background: transparent;
    padding: 0;
}
.doc-footer-left {
    width: 50%;
}
.doc-footer-right {
    width: 50%;
    text-align: center;
}
.doc-noi-nhan-title {
    font-style: italic;
    font-weight: bold;
    font-size: 12pt;
    margin-bottom: 5px;
}
.doc-noi-nhan-content {
    font-size: 11pt;
}
.doc-signer-title {
    font-weight: bold;
    text-transform: uppercase;
    font-size: 13pt;
    margin-bottom: 80px; /* Space for signature */
}
.doc-signer-name {
    font-weight: bold;
    font-size: 14pt;
}

/* Print Styles for A4 */
@media print {
    body * {
        visibility: hidden !important;
    }
    #a4-document-preview, #a4-document-preview * {
        visibility: visible !important;
    }
    #a4-document-preview {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        margin: 0;
        padding: 20mm 20mm 20mm 30mm;
        box-shadow: none;
    }
    @page {
        size: auto;
        margin: 0mm; /* Let padding handle it */
    }
}