/* Madrasa Result Management System - Main Stylesheet */

/* iOS-style San Francisco Font System */
:root {
    --font-family-sf: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', system-ui, -system-ui, sans-serif;
    --font-family-sf-display: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', system-ui, -system-ui, sans-serif;
    --font-family-sf-text: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'SF Pro Display', system-ui, -system-ui, sans-serif;
    
    /* Font weights for San Francisco system */
    --font-weight-ultralight: 100;
    --font-weight-thin: 200;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-heavy: 800;
    --font-weight-black: 900;
}

/* CSS Variables for theming */
:root {
    --primary-color: #1a5f3f;
    --primary-dark: #124a30;
    --primary-light: #2d8b5f;
    --secondary-color: #1e3a5f;
    --accent-color: #c9a227;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-bg: #f8f9fa;
    --dark-bg: #343a40;
    --text-dark: #212529;
    --text-light: #6c757d;
    --white: #ffffff;
    --border-color: #dee2e6;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

/* Reset and Base Styles with iOS Fonts */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* Typography with iOS San Francisco System */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-sf-display);
    font-weight: var(--font-weight-semibold);
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1 { 
    font-size: 2rem; 
    font-weight: var(--font-weight-bold);
}

h2 { 
    font-size: 1.75rem; 
    font-weight: var(--font-weight-semibold);
}

h3 { 
    font-size: 1.5rem; 
    font-weight: var(--font-weight-semibold);
}

h4 { 
    font-size: 1.25rem; 
    font-weight: var(--font-weight-medium);
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    font-family: var(--font-family-sf-text);
}

a:hover {
    color: var(--primary-dark);
}

/* Layout */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-fluid {
    width: 100%;
    padding: 0 1rem;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-text span {
    display: block;
    font-size: 0.75rem;
    font-weight: 400;
    opacity: 0.9;
}

/* Navigation */
.nav {
    display: flex;
    gap: 0.5rem;
}

/* Navigation with iOS Typography */
.nav-link {
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-medium);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Sidebar Menu with iOS Typography */
.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-light);
    transition: var(--transition);
    border-left: 3px solid transparent;
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: var(--light-bg);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

/* Modal and Card Headers with iOS Typography */
.modal-header h2,
.card-header h3,
.card-header h4 {
    font-family: var(--font-family-sf-display);
    font-weight: var(--font-weight-semibold);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Table Headers with iOS Typography */
.table th {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-semibold);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Toast Messages with iOS Typography */
.toast {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.toast-header {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-medium);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--white);
    min-height: calc(100vh - 70px);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 0;
    position: fixed;
    left: 0;
    top: 70px;
    overflow-y: auto;
    transition: var(--transition);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 0.25rem;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.5rem;
    color: var(--text-light);
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: var(--light-bg);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
}

.sidebar-menu a i {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    padding: 2rem;
    min-height: calc(100vh - 70px);
}

/* Cards */
.card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

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

.card-header h3 {
    margin: 0;
    font-size: 1.125rem;
    color: var(--text-dark);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: var(--light-bg);
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

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

.stat-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-card.primary { border-left-color: var(--primary-color); }
.stat-card.success { border-left-color: var(--success-color); }
.stat-card.warning { border-left-color: var(--warning-color); }
.stat-card.info { border-left-color: var(--info-color); }

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

.stat-card.primary .stat-icon { background-color: rgba(26, 95, 63, 0.1); color: var(--primary-color); }
.stat-card.success .stat-icon { background-color: rgba(40, 167, 69, 0.1); color: var(--success-color); }
.stat-card.warning .stat-icon { background-color: rgba(255, 193, 7, 0.1); color: var(--warning-color); }
.stat-card.info .stat-icon { background-color: rgba(23, 162, 184, 0.1); color: var(--info-color); }

.stat-info h4 {
    font-size: 1.75rem;
    margin: 0;
    color: var(--text-dark);
}

.stat-info p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
    font-weight: var(--font-weight-medium);
    line-height: 1.5;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-family: var(--font-family-sf-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(26, 95, 63, 0.25);
}

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

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

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

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

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

.btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: var(--text-dark);
}

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

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

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

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

.form-label.required::after {
    content: ' *';
    color: var(--danger-color);
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 95, 63, 0.1);
}

.form-control:disabled {
    background-color: var(--light-bg);
    cursor: not-allowed;
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.invalid-feedback {
    display: none;
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-control.is-invalid ~ .invalid-feedback {
    display: block;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.form-text {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

/* Input Groups */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group-append {
    display: flex;
}

.input-group-append .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

/* Select */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
    padding-right: 2.5rem;
}

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

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--white);
}

.table th,
.table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: var(--light-bg);
    font-weight: 600;
    color: var(--text-dark);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.table tbody tr:hover {
    background-color: rgba(26, 95, 63, 0.02);
}

.table td {
    color: var(--text-light);
    font-size: 0.9375rem;
}

.table .actions {
    display: flex;
    gap: 0.5rem;
}

.table .btn-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.8125rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
}

.badge-success {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
}

.badge-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #856404;
}

.badge-danger {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.badge-info {
    background-color: rgba(23, 162, 184, 0.1);
    color: var(--info-color);
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 2rem;
}

.login-container {
    width: 100%;
    max-width: 450px;
}

.login-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.login-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 2rem;
    text-align: center;
}

.login-header h1 {
    color: var(--white);
    margin: 0;
    font-size: 1.5rem;
}

.login-header p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0.5rem 0 0;
}

.login-body {
    padding: 2rem;
}

.login-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.login-tab {
    flex: 1;
    padding: 0.75rem;
    text-align: center;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-weight: 500;
    color: var(--text-light);
    transition: var(--transition);
}

.login-tab:hover {
    color: var(--primary-color);
}

.login-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.modal {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(-20px);
    transition: var(--transition);
}

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

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

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

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

.modal-body {
    padding: 1.5rem;
}

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

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 300px;
    max-width: 400px;
    animation: slideIn 0.3s ease;
    border-left: 4px solid;
}

.toast.success {
    border-left-color: var(--success-color);
}

.toast.error {
    border-left-color: var(--danger-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast.info {
    border-left-color: var(--info-color);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast.success .toast-icon { color: var(--success-color); }
.toast.error .toast-icon { color: var(--danger-color); }
.toast.warning .toast-icon { color: var(--warning-color); }
.toast.info .toast-icon { color: var(--info-color); }

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--text-light);
    margin: 0;
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-light);
    font-size: 1.125rem;
}

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

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

.toast.hiding {
    animation: slideOut 0.3s ease forwards;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner.spinner-primary {
    border-color: rgba(26, 95, 63, 0.2);
    border-top-color: var(--primary-color);
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2500;
}

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

.loading-content .spinner {
    width: 3rem;
    height: 3rem;
    border-width: 4px;
}

.loading-content p {
    margin-top: 1rem;
    color: var(--text-light);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--border-color);
    margin-bottom: 1rem;
}

.empty-state h4 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Search and Filter */
.search-filter-bar {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 250px;
}

.filter-box {
    min-width: 200px;
}

/* Form Elements with iOS Typography */
.form-control {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
    font-size: 1rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--white);
    color: var(--text-dark);
    transition: var(--transition);
    width: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 95, 63, 0.1);
}

.form-label {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-medium);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    display: block;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.form-label.required::after {
    content: " *";
    color: var(--danger-color);
}

/* iOS-style select elements */
select.form-control {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

/* iOS-style input elements */
input.form-control,
textarea.form-control {
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-regular);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Pagination with iOS Typography */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    margin-top: 1.5rem;
}

.pagination button {
    padding: 0.5rem 0.875rem;
    border: 1px solid var(--border-color);
    background-color: var(--white);
    color: var(--text-dark);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-family: var(--font-family-sf-text);
    font-weight: var(--font-weight-medium);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.pagination button:hover:not(:disabled) {
    background-color: var(--light-bg);
}

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

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

/* Responsive Design */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .nav {
        display: flex !important;
        gap: 0.25rem;
        flex: 1;
        justify-content: flex-end;
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .nav-link i {
        margin-right: 0.25rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .search-filter-bar {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .search-box,
    .filter-box {
        min-width: 100%;
        width: 100%;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .table-container {
        font-size: 0.85rem;
        -webkit-overflow-scrolling: touch;
        overflow-x: auto;
    }
    
    .table {
        min-width: 600px;
    }
    
    .table th,
    .table td {
        padding: 0.625rem 0.5rem;
        font-size: 0.8rem;
    }
    
    .table .actions {
        gap: 0.25rem;
        white-space: nowrap;
    }
    
    .table .btn-sm {
        padding: 0.25rem 0.4rem;
        font-size: 0.75rem;
    }
    
    .modal {
        width: 95%;
        margin: 1rem;
        max-width: calc(100vw - 2rem);
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .modal-footer {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .modal-footer .btn {
        width: 100%;
    }
    
    .toast-container {
        left: 0.5rem;
        right: 0.5rem;
        top: auto;
        bottom: 1rem;
        width: calc(100% - 1rem);
    }
    
    .toast {
        max-width: 100%;
        min-width: auto;
        font-size: 0.9rem;
    }
    
    .card {
        border-radius: 0.375rem;
    }
    
    .card-header h3 {
        font-size: 1.1rem;
    }
    
    .login-tabs {
        flex-wrap: wrap;
    }
    
    .login-tab {
        font-size: 0.85rem;
        padding: 0.5rem;
    }
    
    .badge {
        font-size: 0.65rem;
        padding: 0.2rem 0.4rem;
    }
}

@media (max-width: 480px) {
    .login-header {
        padding: 1.5rem;
    }
    
    .login-body {
        padding: 1.5rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .card-header,
    .card-body,
    .card-footer {
        padding: 1rem;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }
}

/* Print Styles */
@media print {
    .header,
    .sidebar,
    .btn,
    .actions,
    .search-filter-bar {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.hidden { display: none !important; }
.visible { display: block !important; }

/* Subject Marks Grid */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.subject-field {
    background-color: var(--light-bg);
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    position: relative;
}

.subject-field label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.subject-field input {
    width: 100%;
}

/* Subject Controls */
.subject-controls {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* Result Summary */
.result-summary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
}

/* Class-based Student Results */
.class-section {
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.class-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.class-header h4 {
    margin: 0;
    color: var(--white);
    font-size: 1.25rem;
}

.class-student-count {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
}

.class-students-table {
    width: 100%;
    border-collapse: collapse;
}

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

.class-students-table th {
    background-color: var(--light-bg);
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.class-students-table tbody tr:hover {
    background-color: rgba(26, 95, 63, 0.02);
}

.subject-marks-input {
    width: 80px;
    padding: 0.375rem 0.5rem;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.subject-marks-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 95, 63, 0.1);
}

/* Validation Styles */
.subject-marks-input.invalid-input {
    border-color: #ef4444 !important;
    background-color: #fef2f2;
    animation: shake 0.3s ease-in-out;
}

.subject-marks-input.valid-input {
    border-color: #10b981 !important;
    background-color: #f0fdf4;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Toast message positioning for validation errors */
.toast.validation-toast {
    border-left: 4px solid #ef4444;
}

.result-cell {
    position: relative;
}

/* Save Status Indicator */
.save-status-indicator {
    position: absolute;
    right: 8px;
    bottom: 8px;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.save-status-indicator.save-saving {
    opacity: 1;
    color: #3b82f6;
}

.save-status-indicator.save-success {
    opacity: 1;
    color: #10b981;
}

.save-status-indicator.save-error {
    opacity: 1;
    color: #ef4444;
}

.result-actions {
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.class-students-table tbody tr:hover .result-actions {
    opacity: 1;
}

.result-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
}

.result-badge.a-plus { background-color: rgba(40, 167, 69, 0.1); color: var(--success-color); }
.result-badge.a { background-color: rgba(40, 167, 69, 0.1); color: var(--success-color); }
.result-badge.b-plus { background-color: rgba(23, 162, 184, 0.1); color: var(--info-color); }
.result-badge.b { background-color: rgba(23, 162, 184, 0.1); color: var(--info-color); }
.result-badge.c { background-color: rgba(255, 193, 7, 0.1); color: #856404; }
.result-badge.d { background-color: rgba(255, 193, 7, 0.1); color: #856404; }
.result-badge.f { background-color: rgba(220, 53, 69, 0.1); color: var(--danger-color); }

/* Subject Management Styles */
.subject-management-container {
    max-height: 70vh;
    overflow-y: auto;
}

.subject-controls {
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--light-bg);
    border-radius: var(--border-radius);
}

.subject-field {
    margin-bottom: 1rem;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: white;
}

.subject-field label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.subject-actions {
    display: flex;
    gap: 0.5rem;
}

/* Improve table styling for subject management */
#subjectsTable th:nth-child(3) {
    width: 120px;
}

#subjectsTable td:nth-child(3) {
    text-align: center;
}

/* Responsive adjustments for subject management form */
@media (max-width: 768px) {
    .subject-controls .form-row {
        flex-direction: column;
        gap: 1rem;
    }
    
    .subject-controls .form-group {
        width: 100%;
    }
}

/* Subject Management Modal */
.subject-management-container .card {
    margin-bottom: 1rem;
}

.subject-management-container .card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subject-management-container .card-header h4 {
    margin: 0;
    font-size: 1.125rem;
}

.subject-actions {
    display: flex;
    gap: 0.5rem;
}

.result-summary h4 {
    color: var(--white);
    margin-bottom: 1rem;
}

.result-summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.result-summary-item {
    text-align: center;
}

.result-summary-item .value {
    font-size: 1.5rem;
    font-weight: 700;
    display: block;
}

.result-summary-item .label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Profile Image Upload Styles */
.profile-image-upload {
    text-align: center;
    margin-bottom: 1.5rem;
}

.image-preview-container {
    position: relative;
    display: inline-block;
    margin-bottom: 1rem;
}

.image-preview {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border-color);
    box-shadow: var(--shadow);
}

.image-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--light-bg);
    border: 2px dashed var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.image-placeholder:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(26, 95, 63, 0.05);
}

.image-placeholder i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.image-placeholder p {
    font-size: 0.875rem;
    margin: 0;
}

.image-upload-overlay {
    position: absolute;
    bottom: 5px;
    right: 5px;
    width: 30px;
    height: 30px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.875rem;
    box-shadow: var(--shadow);
    opacity: 0;
    transition: var(--transition);
}

.image-preview-container:hover .image-upload-overlay {
    opacity: 1;
}

.image-upload-controls {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.file-info {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Student Avatar in Table */
.student-avatar {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-image {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--border-color);
}

.profile-placeholder {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    border: 2px solid var(--border-color);
}

/* Import/Export Controls */
.import-export-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-left: auto;
}

@media (max-width: 768px) {
    .import-export-controls {
        margin-left: 0;
        margin-top: 0.5rem;
        width: 100%;
        justify-content: flex-start;
    }
    
    .image-preview,
    .image-placeholder {
        width: 100px;
        height: 100px;
    }
    
    .profile-image,
    .profile-placeholder {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    .image-upload-controls {
        flex-direction: column;
        align-items: center;
    }
    
    .image-upload-controls .btn {
        width: 100%;
        max-width: 200px;
    }
    
    /* Adjust view result modal for mobile */
    #viewResultModal .modal {
        max-width: 95vw;
        margin: 1rem auto;
    }
    
    #viewResultModal .modal-body {
        padding: 1rem;
    }
    
    /* Adjust public result view for mobile */
    .result-public-view .student-avatar {
        width: 60px !important;
        height: 60px !important;
    }
    
    .result-public-view .student-avatar img,
    .result-public-view .student-avatar .fa-user {
        width: 60px !important;
        height: 60px !important;
        font-size: 1.5rem !important;
    }
    
    .result-public-view h3 {
        font-size: 1.25rem;
    }
}

/* Dashboard Charts */
.dashboard-charts {
    margin: 2rem 0;
}

.chart-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.chart-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.chart-card .card-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--light-bg);
}

.chart-card .card-header h3 {
    margin: 0;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.chart-card .card-body {
    padding: 1.5rem;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-card canvas {
    max-width: 100%;
    max-height: 250px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .chart-row {
        grid-template-columns: 1fr;
    }
    
    .chart-card .card-body {
        min-height: 250px;
        padding: 1rem;
    }
}

/* Header Search */
.header-search {
    flex: 1;
    max-width: 400px;
    margin: 0 1rem;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 0.5rem 1rem;
    padding-right: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-family: var(--font-family-sf);
    font-size: 0.875rem;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.15);
}

.search-button {
    position: absolute;
    right: 0.5rem;
    background: transparent;
    border: none;
    color: var(--white);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.search-button:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Responsive adjustments for search */
@media (max-width: 768px) {
    .header-search {
        max-width: 200px;
        margin: 0 0.5rem;
    }
    
    .search-input {
        padding: 0.4rem 0.75rem;
        padding-right: 2rem;
        font-size: 0.75rem;
    }
}

/* Search Results Modal */
.search-results-list {
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    background: var(--card-bg);
}

.search-result-item:hover {
    background: var(--light-bg);
    border-color: var(--primary-color);
}

.search-result-title {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.search-result-desc {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.search-result-type {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 12px;
    font-size: 0.75rem;
    text-transform: uppercase;
}