@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;&display=swap');

:root {
    --primary: #4F46E5;
    --primary-light: #818CF8;
    --primary-dark: #3730A3;
    --secondary: #EC4899;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --background: #F8FAFC;
    --surface: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border: #E2E8F0;
    --sidebar-width: 260px;
    --sidebar-collapsed: 80px;
    --header-height: 70px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.025);
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface);
    border-right: 1px solid var(--border);
    transition: var(--transition);
    position: fixed;
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
    opacity: 1;
    transition: var(--transition);
    margin-left: 10px;
}

.sidebar.collapsed .logo-text {
    opacity: 0;
    display: none;
}

.sidebar-menu {
    padding: 1.5rem 0;
    flex: 1;
    overflow-y: auto;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    margin: 0.2rem 1rem;
    border-radius: var(--radius-md);
    cursor: pointer;
}

.menu-item i {
    font-size: 1.25rem;
    min-width: 24px;
    text-align: center;
}

.menu-item span {
    white-space: nowrap;
    transition: var(--transition);
}

.sidebar.collapsed .menu-item span {
    display: none;
}

.menu-item:hover, .menu-item.active {
    background-color: var(--primary-light);
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.main-content.expanded {
    margin-left: var(--sidebar-collapsed);
}

/* Header */
.top-header {
    height: var(--header-height);
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 90;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.toggle-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.toggle-btn:hover {
    color: var(--primary);
}

.search-bar {
    position: relative;
    width: 300px;
}

.search-bar input {
    width: 100%;
    padding: 0.6rem 1rem 0.6rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 20px;
    background-color: var(--background);
    outline: none;
    color: var(--text-primary);
    transition: var(--transition);
}

.search-bar input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-bar i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.icon-btn {
    position: relative;
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--primary);
}

.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background-color: var(--danger);
    color: white;
    font-size: 0.6rem;
    padding: 2px 5px;
    border-radius: 10px;
    font-weight: bold;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
}

.user-profile img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

.user-info p {
    font-size: 0.9rem;
    font-weight: 600;
}

.user-info span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Page Content */
.page-content {
    padding: 2rem;
    flex: 1;
}

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

.page-title h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.page-title span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Cards */
.kpi-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.kpi-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.kpi-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.kpi-icon.blue { background: rgba(79, 70, 229, 0.1); color: var(--primary); }
.kpi-icon.green { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.kpi-icon.orange { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.kpi-icon.pink { background: rgba(236, 72, 153, 0.1); color: var(--secondary); }

.kpi-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.kpi-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.chart-card, .list-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

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

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Activity List */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.activity-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--background);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    flex-shrink: 0;
}

.activity-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
}

.activity-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-left: auto;
}

/* Buttons */
.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

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

.btn-outline:hover {
    background: var(--background);
    border-color: var(--text-secondary);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* Table */
.table-container {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    overflow: hidden;
    margin-top: 1.5rem;
}

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

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

th, td {
    padding: 1rem 1.5rem;
    text-align: left;
}

th {
    background: rgba(248, 250, 252, 0.8);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

tbody tr:hover {
    background-color: var(--background);
}

.avatar-cell {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.avatar-cell img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.status-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-active { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.status-inactive { background: rgba(239, 68, 68, 0.1); color: var(--danger); }

/* Forms & Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--surface);
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: var(--transition);
}

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

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

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

.close-modal {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-body {
    padding: 1.5rem;
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.6rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    transition: var(--transition);
    background: var(--background);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    background: var(--surface);
}

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

/* Toast Notification */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--surface);
    border-left: 4px solid var(--success);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 1rem;
    transform: translateX(120%);
    transition: var(--transition);
}

.toast.show {
    transform: translateX(0);
}

/* RTL Support for Arabic */
[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .sidebar {
    left: 0;
    right: auto;
    border-right: 1px solid var(--border);
    border-left: none;
}

[dir="rtl"] .main-content {
    margin-left: var(--sidebar-width);
    margin-right: 0;
}

[dir="rtl"] .main-content.expanded {
    margin-left: var(--sidebar-collapsed);
    margin-right: 0;
}

[dir="rtl"] .search-bar input {
    padding: 0.6rem 2.5rem 0.6rem 1rem;
}

[dir="rtl"] .search-bar i {
    left: auto;
    right: 12px;
}

[dir="rtl"] .header-right {
    margin-right: auto;
    margin-left: 0;
}

[dir="rtl"] .badge {
    right: auto;
    left: -5px;
}

[dir="rtl"] .activity-item {
    gap: 1rem;
}

[dir="rtl"] .activity-time {
    margin-left: 0;
    margin-right: auto;
}

[dir="rtl"] th, [dir="rtl"] td {
    text-align: right;
}

[dir="rtl"] .toast {
    border-left: none;
    border-right: 4px solid var(--success);
}

[dir="rtl"] .modal-header .close-modal {
    margin-left: 0;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.4s ease forwards;
}

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

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(100%); /* RTL assumed, adjust in JS */
        z-index: 1000;
    }
    
    body:not([dir="rtl"]) .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.mobile-open {
        transform: translateX(0) !important;
    }

    .main-content {
        margin: 0 !important;
    }
    
    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 999;
        display: none;
    }
    
    .overlay.active {
        display: block;
    }

    .header-left .search-bar {
        display: none;
    }
}

/* --- Mobile Dimension Forcing Classes --- */
body.mobile-simulator {
    display: flex;
    justify-content: center;
    background: #333;
    align-items: center;
    min-height: 100vh;
}

body.mobile-simulator .app-container {
    width: 390px;
    height: 844px;
    max-height: 90vh;
    background: var(--background);
    position: relative;
    overflow: hidden;
    border-radius: 40px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 8px solid #111;
}

body.mobile-simulator .sidebar {
    position: absolute;
    height: 100%;
}

body.mobile-simulator .main-content {
    margin: 0 !important;
    height: 100%;
    overflow-y: auto;
}

body.mobile-simulator .top-header {
    top: 0;
    position: sticky;
}

body.mobile-simulator .kpi-cards, 
body.mobile-simulator .dashboard-grid, 
body.mobile-simulator .classes-grid, 
body.mobile-simulator .teachers-grid, 
body.mobile-simulator .finance-summary {
    grid-template-columns: 1fr;
}

body.mobile-simulator .search-bar.mobile-hide {
    display: none;
}

body.mobile-simulator .table-container {
    zoom: 0.8;
}

body.mobile-simulator .chat-container {
    flex-direction: column;
}

body.mobile-simulator .chat-sidebar {
    width: 100%;
    height: 35%;
    border-left: none;
    border-bottom: 1px solid var(--border);
}

body.mobile-simulator .chat-window {
    height: 65%;
}