/* ============================================================
   🌟 Rafeq Master Admin Center - Elite Executive Design System
   Refined for Ultra-Clean Layout, Instant Responsiveness & SaaS Polish
   ============================================================ */

:root {
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-subtle: #f1f5f9;
    --border-color: #e2e8f0;
    --border-focus: #3b82f6;

    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-dim: #94a3b8;

    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-border: #bfdbfe;

    --success: #10b981;
    --success-hover: #059669;
    --success-light: #ecfdf5;

    --warning: #f59e0b;
    --warning-hover: #d97706;
    --warning-light: #fffbeb;

    --danger: #ef4444;
    --danger-hover: #dc2626;
    --danger-light: #fef2f2;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 18px;
    --radius-full: 9999px;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 35px -5px rgba(0, 0, 0, 0.12);
}

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

body {
    font-family: 'Tajawal', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.6;
    direction: rtl;
    text-align: right;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ================= 1. Executive Top Command Header ================= */
.app-header {
    background: linear-gradient(180deg, #0b1329 0%, #0f172a 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

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

.brand-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, #38bdf8 0%, #2563eb 50%, #7c3aed 100%);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

.brand-text h1 {
    font-size: 18px;
    font-weight: 900;
    color: #ffffff;
    margin: 0;
    line-height: 1.2;
}

.brand-text .status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11.5px;
    color: #34d399;
    font-weight: 700;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px #10b981;
    animation: pulseRadar 2s infinite ease-in-out;
}

@keyframes pulseRadar {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.6; }
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.admin-email-badge {
    font-size: 12.5px;
    font-weight: 700;
    color: #cbd5e1;
    background: rgba(255, 255, 255, 0.08);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.12);
    display: inline-flex;
    align-items: center;
    gap: 7px;
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ================= 2. Navigation Tabs Bar ================= */
.tabs-navigation-wrapper {
    background: #ffffff;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-xs);
    position: sticky;
    top: 63px;
    z-index: 90;
}

.tabs-navigation {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 6px;
    padding: 6px 24px;
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 9px 18px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 800;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.tab-btn.active {
    color: var(--primary);
    background: #eff6ff;
    box-shadow: 0 1px 3px rgba(37, 99, 235, 0.1);
    border: 1px solid #dbeafe;
}

.tab-badge {
    background: var(--bg-subtle);
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

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

/* ================= 3. Main Container ================= */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
}

/* ================= 4. Master Grade Switcher Bar ================= */
.grade-switcher-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    padding: 12px 20px;
    margin-bottom: 24px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.2);
    flex-wrap: wrap;
    color: #fff;
}

.grade-switcher-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13.5px;
    font-weight: 800;
    color: #94a3b8;
}

.grade-switcher-title i {
    color: #38bdf8;
    font-size: 16px;
}

.grade-pills {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.grade-pill {
    padding: 7px 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.06);
    color: #cbd5e1;
    font-family: inherit;
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.grade-pill:hover {
    background: rgba(255, 255, 255, 0.14);
    color: #ffffff;
    transform: translateY(-1px);
}

.grade-pill.active {
    background: #2563eb;
    border-color: #60a5fa;
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
}

.grade-pill#pill-grade-2.active {
    background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
    border-color: #38bdf8;
}

.grade-pill#pill-grade-3.active {
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
    border-color: #c084fc;
}

.grade-pill#pill-grade-4.active {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
    border-color: #fbbf24;
}

.grade-pill-tag {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 900;
    background: rgba(255, 255, 255, 0.2);
}

.pill-count {
    padding: 1px 7px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 900;
    background: rgba(0, 0, 0, 0.25);
    margin-right: 4px;
}

.grade-context-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.08);
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    color: #93c5fd;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.indicator-dot {
    width: 6px;
    height: 6px;
    background: #38bdf8;
    border-radius: 50%;
    box-shadow: 0 0 6px #38bdf8;
    display: inline-block;
}

/* ================= 5. KPI Cards Deck ================= */
.kpi-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--bg-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.25s ease;
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: #cbd5e1;
}

.kpi-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.kpi-icon.teachers { background: #f5f3ff; color: #7c3aed; }
.kpi-icon.students { background: #eff6ff; color: #2563eb; }
.kpi-icon.licenses { background: #ecfdf5; color: #059669; }
.kpi-icon.revenue { background: #fffbeb; color: #d97706; }

.kpi-content {
    flex: 1;
    margin-right: 14px;
}

.kpi-num {
    font-size: 28px;
    font-weight: 900;
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
    line-height: 1.1;
}

.kpi-title {
    font-size: 13.5px;
    font-weight: 800;
    color: var(--text-muted);
    margin-top: 3px;
}

.kpi-subtitle {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-dim);
    margin-top: 2px;
}

/* ================= 6. Buttons & Inputs ================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 800;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: #ffffff;
    color: var(--text-main);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-subtle);
    border-color: #cbd5e1;
}

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

.btn-success:hover:not(:disabled) {
    background: var(--success-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--danger-hover);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12.5px;
}

.btn-icon {
    width: 34px;
    height: 34px;
    padding: 0;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:has(span) {
    width: auto !important;
    padding: 6px 12px !important;
    gap: 6px !important;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 9px 14px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 13.5px;
    color: var(--text-main);
    background: #ffffff;
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

/* ================= 7. Header Controls (Toolbar) ================= */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    gap: 16px;
    flex-wrap: wrap;
}

.section-title h2 {
    font-size: 20px;
    font-weight: 900;
    color: var(--text-main);
}

.section-title p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Elite Compact Horizontal Controls Toolbar */
.header-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.header-controls .custom-select {
    width: auto !important;
    min-width: 130px;
    max-width: 170px;
    padding: 8px 12px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
    background: #ffffff;
    cursor: pointer;
}

.header-controls .search-input-group {
    position: relative;
    width: auto;
    min-width: 220px;
    max-width: 280px;
}

.header-controls .search-input {
    width: 100%;
    padding: 8px 36px 8px 12px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 13px;
    color: var(--text-main);
    background: #ffffff;
}

.search-input-group i {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dim);
    font-size: 14px;
}

/* ================= 8. Quick Filter Chips ================= */
.quick-filter-chips {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 8px 0 16px 0;
    overflow-x: auto;
    padding-bottom: 4px;
}

.quick-filter-chips .chip {
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: #ffffff;
    font-family: inherit;
    font-size: 12.5px;
    font-weight: 800;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.quick-filter-chips .chip:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--bg-subtle);
}

.quick-filter-chips .chip.active {
    background: #0f172a;
    color: #ffffff;
    border-color: #0f172a;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.2);
}

/* ================= 9. Data Tables & Badges ================= */
.table-card {
    background: #ffffff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: 20px;
}

.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    text-align: right;
}

.data-table thead th {
    background: #f8fafc;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 12px 18px;
    border-bottom: 1px solid #f1f5f9;
    font-size: 13.5px;
    vertical-align: middle;
}

.data-table tbody tr:hover {
    background-color: #f8fafc;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* CRITICAL: Strict thumbnail sizing for student avatars */
.student-avatar-thumb {
    width: 42px !important;
    height: 42px !important;
    min-width: 42px !important;
    min-height: 42px !important;
    max-width: 42px !important;
    max-height: 42px !important;
    border-radius: 50% !important;
    object-fit: cover !important;
    border: 2px solid #e2e8f0 !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06) !important;
    flex-shrink: 0 !important;
    display: inline-block !important;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 800;
    line-height: 1.3;
}

.badge-primary { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.badge-success { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }
.badge-warning { background: #fffbeb; color: #b45309; border: 1px solid #fde68a; }
.badge-danger  { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.badge-info    { background: #f0f9ff; color: #0369a1; border: 1px solid #bae6fd; }

.badge-grade-2 { background: #fffbeb !important; color: #b45309 !important; border: 1px solid #fde68a !important; font-weight: 800; }
.badge-grade-3 { background: #eff6ff !important; color: #1d4ed8 !important; border: 1px solid #bfdbfe !important; font-weight: 800; }
.badge-grade-4 { background: #faf5ff !important; color: #7e22ce !important; border: 1px solid #e9d5ff !important; font-weight: 800; }
.badge-universal { background: #f0fdf4 !important; color: #15803d !important; border: 1px solid #bbf7d0 !important; font-weight: 800; }

/* Table Pagination Toolbar */
.table-pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: #f8fafc;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 12px;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 14px;
}

.page-size-selector select {
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: #ffffff;
    font-weight: 800;
    color: var(--text-main);
    cursor: pointer;
}

.page-indicator {
    padding: 5px 12px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-weight: 800;
    color: var(--primary);
    font-size: 12.5px;
    min-width: 80px;
    text-align: center;
}

/* ================= 10. Teachers Directory & Profile ================= */
.teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 18px;
    margin-top: 16px;
}

.teacher-card {
    background: #ffffff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.25s ease;
}

.teacher-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
    transform: translateY(-2px);
}

.teacher-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.teacher-avatar-box {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-lg);
    background: #f5f3ff;
    color: #7c3aed;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    border: 1px solid #ddd6fe;
    flex-shrink: 0;
}

.teacher-card h3 {
    font-size: 15.5px;
    font-weight: 900;
    color: var(--text-main);
    margin: 0 0 3px 0;
}

.teacher-meta {
    display: flex;
    gap: 10px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

.teacher-stats-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    background: var(--bg-subtle);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    margin-bottom: 14px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    font-size: 11px;
    color: var(--text-dim);
    font-weight: 700;
    display: block;
    margin-bottom: 2px;
}

.stat-value {
    font-size: 17px;
    font-weight: 900;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.teacher-card-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Teacher Profile View (Hidden unless active) */
.teacher-profile-view {
    display: none;
}

.teacher-profile-view.active {
    display: block;
    animation: fadeIn 0.25s ease;
}

.profile-top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 16px 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    flex-wrap: wrap;
    gap: 14px;
}

.profile-top-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.profile-action-buttons {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* ================= 11. CMS & Content Styles ================= */
.cms-subnav-bar {
    display: flex;
    gap: 8px;
    background: #ffffff;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    flex-wrap: wrap;
    box-shadow: var(--shadow-xs);
}

.cms-subnav-btn {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: 13.5px;
    font-weight: 800;
    color: var(--text-muted);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.cms-subnav-btn:hover {
    color: var(--primary);
    background: var(--bg-subtle);
}

.cms-subnav-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.cms-subpane {
    display: none;
}

.cms-subpane.active {
    display: block;
    animation: fadeIn 0.2s ease;
}

/* ================= 12. Settings Cards Grid ================= */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    margin-top: 16px;
}

.setting-card {
    background: #ffffff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.25s ease;
}

.setting-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.setting-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.setting-card-title {
    font-size: 16px;
    font-weight: 900;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-card-desc {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
    flex-shrink: 0;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0; left: 0; right: 0; bottom: 0;
    background-color: #cbd5e1;
    transition: .3s;
    border-radius: 999px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

input:checked + .slider {
    background-color: #10b981;
}

input:checked + .slider.danger {
    background-color: #ef4444;
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* ================= 13. Modals ================= */
.modal-overlay.open,
.modal-overlay.active {
    display: flex !important;
}

.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-box {
    background: #ffffff;
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 540px;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255, 255, 255, 0.8);
    animation: modalZoomIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

@keyframes modalZoomIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    padding: 16px 22px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8fafc;
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 900;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 22px;
    color: var(--text-dim);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-main);
}

.modal-body {
    padding: 20px 22px;
    max-height: 75vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 14px 22px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    background: #f8fafc;
}

/* Toast Container */
.toast-container {
    position: fixed;
    bottom: 24px;
    left: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: #0f172a;
    color: #ffffff;
    padding: 12px 20px;
    border-radius: var(--radius-lg);
    font-size: 13.5px;
    font-weight: 800;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    animation: toastSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

@keyframes toastSlideIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Login Overlay */
#admin-login-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 50% 25%, #1e293b 0%, #0f172a 100%);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-box {
    background: #ffffff;
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 440px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-xl);
}

.login-box h2 {
    font-size: 24px;
    font-weight: 900;
    color: var(--text-main);
    margin-bottom: 8px;
}

.login-box p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   CRITICAL VIEW VISIBILITY & TAB ROUTING RULES
   ============================================================ */

/* Main Tab Panes - Only ACTIVE pane must be visible */
.tab-pane {
    display: none !important;
}

.tab-pane.active {
    display: block !important;
    animation: tabFadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

@keyframes tabFadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* CMS Subpanes - Only ACTIVE subpane must be visible */
.cms-subpane {
    display: none !important;
}

.cms-subpane.active {
    display: block !important;
    animation: tabFadeIn 0.2s ease !important;
}

/* Teacher Directory vs Single Teacher Profile Views */
#teachers-list-view {
    display: block;
}

.teacher-profile-view {
    display: none !important;
}

.teacher-profile-view.active {
    display: block !important;
    animation: tabFadeIn 0.25s ease !important;
}

/* Header Controls & Filter Dropdowns: Force Compact Inline Layout */
.header-controls {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex-wrap: wrap !important;
}

.header-controls .custom-select {
    width: auto !important;
    min-width: 130px !important;
    max-width: 175px !important;
    flex: 0 0 auto !important;
    padding: 8px 12px !important;
    border: 1.5px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    color: var(--text-main) !important;
    background: #ffffff !important;
    cursor: pointer !important;
}

.header-controls .search-input-group {
    width: auto !important;
    min-width: 220px !important;
    max-width: 280px !important;
    flex: 0 0 auto !important;
}

.header-controls .search-input {
    width: 100% !important;
    padding: 8px 36px 8px 12px !important;
    border: 1.5px solid var(--border-color) !important;
    border-radius: var(--radius-md) !important;
    font-size: 13px !important;
}

/* Prevent Top Header Button Clipping */
.header-container {
    max-width: 1400px !important;
    margin: 0 auto !important;
    padding: 10px 20px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 12px !important;
    flex-wrap: nowrap !important;
}

.user-actions {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex-shrink: 0 !important;
}

.user-actions .btn {
    flex-shrink: 0 !important;
}

.admin-email-badge {
    max-width: 180px !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    white-space: nowrap !important;
    flex-shrink: 1 !important;
}

/* Master Grade Switcher Refinements */
.grade-switcher-bar {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 12px !important;
    flex-wrap: wrap !important;
}

.grade-context-indicator {
    margin: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    background: rgba(255, 255, 255, 0.08) !important;
    padding: 6px 14px !important;
    border-radius: 999px !important;
    font-size: 12.5px !important;
    color: #93c5fd !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
}

/* Strict Student Avatar Thumbnail */
.student-avatar-thumb {
    width: 42px !important;
    height: 42px !important;
    min-width: 42px !important;
    min-height: 42px !important;
    max-width: 42px !important;
    max-height: 42px !important;
    border-radius: 50% !important;
    object-fit: cover !important;
    border: 2px solid #e2e8f0 !important;
    box-shadow: 0 2px 6px rgba(0,0,0,0.06) !important;
    flex-shrink: 0 !important;
    display: inline-block !important;
}


/* ============================================================
   🌟 Universal Executive Form Controls, Dropdowns & Filter Strips
   ============================================================ */

/* Universal Custom Select Dropdown with RTL SVG Arrow */
select, .custom-select {
    appearance: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    background-color: #ffffff !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: left 12px center !important;
    background-size: 15px 15px !important;
    padding: 8px 14px 8px 34px !important;
    border: 1.5px solid #cbd5e1 !important;
    border-radius: var(--radius-md) !important;
    font-family: inherit !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    color: var(--text-main) !important;
    cursor: pointer !important;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
    outline: none !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04) !important;
}

select:hover, .custom-select:hover {
    border-color: #94a3b8 !important;
    background-color: #f8fafc !important;
}

select:focus, .custom-select:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
    background-color: #ffffff !important;
}

/* Universal Textarea and Inputs */
textarea.form-control {
    width: 100% !important;
    padding: 10px 14px !important;
    border: 1.5px solid #cbd5e1 !important;
    border-radius: var(--radius-md) !important;
    font-family: inherit !important;
    font-size: 13px !important;
    color: var(--text-main) !important;
    background: #ffffff !important;
    resize: vertical !important;
    min-height: 72px !important;
    line-height: 1.6 !important;
    transition: all 0.2s ease !important;
}

textarea.form-control:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
    outline: none !important;
}

/* Integrated Toolbar Filter Strip */
.toolbar-filter-strip {
    display: flex !important;
    align-items: center !important;
    gap: 10px !important;
    margin-bottom: 16px !important;
    flex-wrap: wrap !important;
    background: #ffffff !important;
    padding: 12px 18px !important;
    border-radius: var(--radius-xl) !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-xs) !important;
}

.toolbar-filter-strip .search-input-group {
    position: relative !important;
    margin: 0 !important;
}

.toolbar-filter-strip .search-input {
    width: 100% !important;
    padding: 8px 36px 8px 14px !important;
    border: 1.5px solid #cbd5e1 !important;
    border-radius: var(--radius-md) !important;
    font-size: 13px !important;
    color: var(--text-main) !important;
    background: #ffffff !important;
}

.toolbar-filter-strip .search-input:focus {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15) !important;
    outline: none !important;
}

/* Store Presets Grid & Pill Buttons */
.store-presets-grid {
    display: flex !important;
    gap: 8px !important;
    margin-top: 8px !important;
    flex-wrap: wrap !important;
}

.btn-store-preset {
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    padding: 6px 14px !important;
    background: #f8fafc !important;
    border: 1.5px solid #cbd5e1 !important;
    border-radius: 999px !important;
    font-family: inherit !important;
    font-size: 12px !important;
    font-weight: 800 !important;
    color: #334155 !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
}

.btn-store-preset:hover {
    background: #eff6ff !important;
    border-color: #3b82f6 !important;
    color: #1d4ed8 !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.15) !important;
}

/* Table pagination page-size selector */
.page-size-selector select {
    appearance: none !important;
    -webkit-appearance: none !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23475569' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: left 6px center !important;
    background-size: 12px 12px !important;
    padding: 4px 8px 4px 22px !important;
    border: 1.5px solid #cbd5e1 !important;
    border-radius: var(--radius-sm) !important;
    font-size: 12px !important;
    font-weight: 800 !important;
}

/* ============================================================
   📱 Viewport Overflow Protection & Responsive Navigation
   ============================================================ */

html, body {
    max-width: 100vw;
    overflow-x: hidden;
}

.table-card {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    min-width: 820px;
}

@media (max-width: 1024px) {
    .header-container {
        padding: 8px 16px !important;
        gap: 8px !important;
    }
    .brand-text h1 {
        font-size: 16px !important;
    }
    .brand-text .status-badge {
        font-size: 10.5px !important;
    }
    .admin-email-badge {
        max-width: 120px !important;
        font-size: 11px !important;
        padding: 4px 8px !important;
    }
    #btn-top-refresh span {
        display: none !important;
    }
    #btn-top-refresh {
        padding: 6px 10px !important;
    }
}

@media (max-width: 768px) {
    .main-container {
        padding: 14px 12px !important;
    }
    .toolbar-filter-strip {
        padding: 10px 12px !important;
    }
    .grade-switcher-bar {
        padding: 10px 14px !important;
    }
}