/**
 * Pre-School CRM - Main Stylesheet
 */

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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-bg: #f8f9fa;
    --dark-text: #333;
    --light-text: #666;
    --border-color: #e0e0e0;
    --sidebar-width: 260px;
    --header-height: 70px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f7fa;
    color: var(--dark-text);
    line-height: 1.6;
}

/* Header */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
    }
    to {
        transform: translateY(0);
    }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    height: 100%;
    position: relative;
}

.logo-section h2 {
    color: var(--primary-color);
    font-size: 24px;
}

.user-section {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.user-info i {
    font-size: 24px;
    color: var(--primary-color);
}

.badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

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

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

.logout-btn {
    padding: 10px 20px;
    background: var(--danger-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    font-size: 14px;
}

.logout-btn:hover {
    background: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(220, 53, 69, 0.3);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--header-height);
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: white;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    animation: slideInLeft 0.3s ease-out;
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

.sidebar-nav {
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    color: var(--light-text);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item i {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.nav-item:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    transform: translateX(5px);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, transparent 100%);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.nav-item.sub-nav {
    font-size: 14px;
    padding: 12px 25px 12px 50px;
}

.nav-item.sub-nav.active {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.15) 0%, transparent 100%);
    font-weight: 600;
}

.nav-divider {
    height: 1px;
    background: var(--border-color);
    margin: 15px 0;
}

/* Main Container */
.main-container {
    margin-top: var(--header-height);
    margin-left: var(--sidebar-width);
    min-height: calc(100vh - var(--header-height));
    padding: 20px;
}

.content {
    max-width: 1400px;
    margin: 0 auto;
}

/* Page Header */
.page-header {
    margin-bottom: 20px;
    animation: fadeIn 0.5s ease-out;
}

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

.page-header h1 {
    font-size: 24px;
    color: var(--dark-text);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.page-header h1 i {
    font-size: 22px;
}

.page-header p {
    color: var(--light-text);
    font-size: 14px;
    margin: 0;
}

/* Cards */
.card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out;
}

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

.card-header {
    padding: 16px 22px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

.card-header h2 {
    font-size: 20px;
    color: var(--dark-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-body {
    padding: 20px;
}

/* Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 18px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s;
    cursor: pointer;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    width: 55px;
    height: 55px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-content h3 {
    font-size: 22px;
    color: var(--dark-text);
    margin-bottom: 4px;
    font-weight: 700;
    line-height: 1.2;
}

.stat-content p {
    color: var(--light-text);
    font-size: 12px;
    margin: 0;
    line-height: 1.3;
}

/* Forms */
.form-group {
    margin-bottom: 10px;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    color: var(--dark-text);
    font-weight: 600;
    font-size: 14px;
}

.form-group label .required {
    color: var(--danger-color);
}

.form-control {
    width: 100%;
    padding: 6px 10px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    resize: vertical;
    min-height: 70px;
}

/* Buttons */
.btn {
    padding: 12px 25px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

/* Small buttons for filters */
.filter-bar .btn {
    padding: 6px 12px;
    font-size: 13px;
    border-radius: 6px;
    gap: 6px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

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

.btn-success:hover {
    background: #218838;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: #c82333;
    transform: translateY(-2px);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

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

/* Tables */
.table-container {
    overflow-x: auto;
    padding: 12px;
}

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

.table thead {
    background: #6f42c1;
    color: #ffffff;
}

.table th {
    padding: 10px 8px;
    text-align: left;
    font-weight: 600;
    color: #ffffff;
    border-bottom: none;
    font-size: 13px;
}

.table td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
}

.table tbody tr {
    transition: background 0.2s ease;
}

.table tbody tr:nth-child(even) {
    background: #f8f5ff;
}

.table tbody tr:hover {
    background: #efe7ff;
}

/* Sticky Filter Bar */
.filter-bar {
    position: sticky;
    top: calc(var(--header-height) + 8px);
    z-index: 900;
    background: #f8f9fb;
    border-radius: 10px;
    padding: 8px 12px;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.05);
    margin-bottom: 10px;
}

.filter-bar form {
    margin: 0;
}

.filter-bar .form-group {
    margin-bottom: 8px;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: var(--success-color);
}

.alert-danger {
    background: #f8d7da;
    color: #721c24;
    border-color: var(--danger-color);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: var(--warning-color);
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: var(--info-color);
}

/* Activity List */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    transition: all 0.3s;
}

.activity-item:hover {
    background: #e9ecef;
    transform: translateX(5px);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
}

.activity-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.activity-content strong {
    color: var(--dark-text);
}

.activity-content span {
    color: var(--light-text);
    font-size: 14px;
}

.activity-content small {
    color: var(--light-text);
    font-size: 12px;
}

.activity-time {
    color: var(--light-text);
    font-size: 12px;
}

/* Utilities */
.text-muted {
    color: var(--light-text);
}

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 20px;
    transition: all 0.3s;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    background: var(--secondary-color);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

.mobile-menu-toggle:focus {
    outline: 2px solid rgba(102, 126, 234, 0.5);
    outline-offset: 2px;
}

/* Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s;
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-container {
        padding: 16px;
    }
    
    .card-body {
        padding: 16px;
    }
    
    .card-header {
        padding: 14px 18px;
    }
}

@media (max-width: 768px) {
    /* Header */
    .header-content {
        padding: 0 40px;
        justify-content: center;
    }
    
    .logo-section h2 {
        font-size: 18px;
    }
    
    .mobile-menu-toggle {
        display: block;
        position: absolute;
        left: 10px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .user-section {
        gap: 10px;
        position: absolute;
        right: 10px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .user-info {
        display: none;
    }
    
    .user-info .user-name-text {
        display: none;
    }
    
    .logout-btn {
        padding: 8px 15px;
        font-size: 12px;
    }
    
    .logout-btn i {
        margin-right: 0;
    }
    
    .logout-btn span {
        display: none;
    }
    
    /* Sidebar */
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease-in-out;
        z-index: 1000;
        width: 280px;
        box-shadow: 2px 0 20px rgba(0, 0, 0, 0.3);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    /* Main Container */
    .main-container {
        margin-left: 0;
        padding: 15px;
        margin-top: var(--header-height);
    }
    
    .content {
        max-width: 100%;
    }
    
    /* Page Header */
    .page-header {
        margin-bottom: 15px;
    }
    
    .page-header h1 {
        font-size: 20px;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .page-header h1 i {
        font-size: 18px;
    }
    
    .page-header p {
        font-size: 13px;
    }
    
    /* Cards */
    .card {
        margin-bottom: 20px;
        border-radius: 10px;
    }
    
    .card-header {
        padding: 15px;
    }
    
    .card-header h2 {
        font-size: 18px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    /* Statistics Grid */
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 15px;
        margin-bottom: 20px;
    }
    
    .stat-card {
        padding: 15px;
        gap: 12px;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .stat-content h3 {
        font-size: 20px;
    }
    
    .stat-content p {
        font-size: 11px;
    }
    
    /* Forms */
    .form-group {
        margin-bottom: 20px;
    }
    
    /* Buttons */
    .btn {
        padding: 12px 20px;
        font-size: 14px;
        width: 100%;
        justify-content: center;
    }
    
    /* Tables */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        margin: -15px;
        padding: 15px;
    }
    
    .table {
        min-width: 600px;
        font-size: 14px;
    }
    
    .table th,
    .table td {
        padding: 10px 8px;
        font-size: 13px;
    }
    
    .table th {
        font-size: 12px;
        white-space: nowrap;
    }
    
    /* Activity List */
    .activity-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 12px;
    }
    
    .activity-content {
        width: 100%;
    }
    
    .activity-time {
        align-self: flex-end;
        font-size: 11px;
    }
    
    /* Alerts */
    .alert {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    /* Badges */
    .badge {
        padding: 3px 8px;
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    /* Header */
    .header-content {
        padding: 0 10px;
    }
    
    .logo-section h2 {
        font-size: 16px;
    }
    
    .main-container {
        padding: 10px;
    }
    
    /* Page Header */
    .page-header {
        margin-bottom: 12px;
    }
    
    .page-header h1 {
        font-size: 18px;
        gap: 8px;
    }
    
    .page-header h1 i {
        font-size: 16px;
    }
    
    .page-header p {
        font-size: 12px;
    }
    
    /* Cards */
    .card-header {
        padding: 12px;
    }
    
    .card-header h2 {
        font-size: 16px;
    }
    
    .card-body {
        padding: 12px;
    }
    
    /* Statistics */
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .stat-card {
        padding: 15px;
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .stat-icon {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    .stat-content h3 {
        font-size: 18px;
    }
    
    .stat-content p {
        font-size: 11px;
    }
    
    /* Forms */
    .form-group label {
        font-size: 13px;
    }
    
    .form-control {
        padding: 10px 12px;
        font-size: 14px;
    }
    
    /* Buttons */
    .btn {
        padding: 10px 15px;
        font-size: 13px;
    }
    
    /* Tables */
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 8px 5px;
        font-size: 11px;
    }
    
    /* Login Page */
    .login-container {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .logo h1 {
        font-size: 28px;
    }
    
    .info {
        padding: 15px;
        font-size: 12px;
    }
    
    /* Modals */
    #editModal > div {
        width: 95% !important;
        max-width: 95% !important;
        padding: 20px !important;
        margin: 10px;
    }
    
    /* Form Grids */
    div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
    
    /* Button Groups */
    div[style*="display: flex"][style*="gap"] {
        flex-direction: column;
    }
    
    div[style*="display: flex"][style*="gap"] .btn {
        width: 100%;
        margin-bottom: 10px;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}