/* ========================================
   School Management System - Stage 1 Styles
   Modern, Clean, Production-Ready
   ======================================== */

/* CSS Variables */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #e0e7ff;
    --secondary: #64748b;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-800: #334155;
    --gray-700: #475569;
    --gray-600: #64748b;
    --gray-500: #94a3b8;
    --gray-400: #cbd5e1;
    --gray-300: #e2e8f0;
    --gray-200: #f1f5f9;
    --gray-100: #f8fafc;
    --white: #ffffff;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    --sidebar-width: 260px;
    --header-height: 64px;
    --transition: all 0.2s ease-in-out;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --dark: #0f172a;
    --gray-900: #f8fafc;
    --gray-800: #f1f5f9;
    --gray-700: #e2e8f0;
    --gray-600: #cbd5e1;
    --gray-500: #94a3b8;
    --gray-400: #64748b;
    --gray-300: #475569;
    --gray-200: #334155;
    --gray-100: #1e293b;
    --gray-50: #162032;
    --white: #0f172a;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.4), 0 1px 2px -1px rgb(0 0 0 / 0.4);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

[data-theme="dark"] .sidebar,
[data-theme="dark"] .main-header,
[data-theme="dark"] .main-footer,
[data-theme="dark"] .dashboard-card,
[data-theme="dark"] .auth-card,
[data-theme="dark"] .stat-card,
[data-theme="dark"] .form-card,
[data-theme="dark"] .public-nav,
[data-theme="dark"] .public-footer,
[data-theme="dark"] .card,
[data-theme="dark"] .team-card {
    background: var(--gray-100);
    border-color: var(--gray-200);
}

[data-theme="dark"] .nav-item:hover {
    background: var(--gray-200);
}

[data-theme="dark"] .form-control {
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

[data-theme="dark"] .form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3);
}

[data-theme="dark"] .data-table th {
    background: var(--gray-200);
}

[data-theme="dark"] .data-table td {
    border-color: var(--gray-200);
}

[data-theme="dark"] .hero-stats {
    border-color: rgba(255,255,255,0.2);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--gray-100);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ========================================
   AUTHENTICATION PAGES
   ======================================== */
.auth-page {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.auth-wrapper {
    width: 100%;
    max-width: 440px;
}

.auth-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-icon {
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.auth-icon i {
    font-size: 1.75rem;
    color: var(--primary);
}

.auth-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

/* Form Styles */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group label i {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.form-control {
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--gray-800);
    background: var(--white);
    transition: var(--transition);
    width: 100%;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder {
    color: var(--gray-400);
}

.input-group {
    position: relative;
    display: flex;
}

.input-group .form-control {
    padding-right: 2.75rem;
}

.toggle-password {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    padding: 0.25rem;
    transition: var(--transition);
}

.toggle-password:hover {
    color: var(--gray-600);
}

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--gray-600);
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.checkmark::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 10px;
    color: var(--white);
    opacity: 0;
    transition: var(--transition);
}

.checkbox-label input:checked + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-label input:checked + .checkmark::after {
    opacity: 1;
}

.forgot-link {
    color: var(--primary);
    font-weight: 500;
}

.forgot-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-block {
    width: 100%;
}

/* Demo Info */
.auth-demo-info {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-200);
    text-align: center;
}

.auth-demo-info p {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-bottom: 0.75rem;
}

.demo-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.demo-item {
    background: var(--gray-100);
    padding: 0.5rem;
    border-radius: var(--radius);
    font-size: var(--font-size-xs);
}

.demo-role {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.25rem;
}

.demo-item code {
    color: var(--primary);
    font-family: 'Courier New', monospace;
    background: var(--primary-light);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: 1.5rem;
    animation: slideDown 0.3s ease;
}

.alert-success {
    background: var(--success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: var(--danger-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: var(--info-light);
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.alert-close {
    margin-left: auto;
    color: inherit;
    opacity: 0.6;
    transition: var(--transition);
}

.alert-close:hover {
    opacity: 1;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   DASHBOARD LAYOUT
   ======================================== */
.dashboard-page {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--white);
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
}

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

.brand-icon i {
    color: var(--white);
    font-size: var(--font-size-lg);
}

.brand-text {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--gray-900);
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0.75rem;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-label {
    display: block;
    padding: 0 0.75rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
    margin-bottom: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    border-radius: var(--radius);
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition);
    margin-bottom: 0.25rem;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: var(--font-size-sm);
}

.nav-item:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.main-header {
    height: var(--header-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    background: var(--gray-100);
}

.page-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.icon-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    background: var(--gray-100);
    transition: var(--transition);
}

.icon-btn:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.icon-btn .badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    background: var(--danger);
    color: var(--white);
    font-size: 10px;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius);
    background: var(--gray-100);
    transition: var(--transition);
}

.user-btn:hover {
    background: var(--gray-200);
}

.user-avatar {
    width: 32px;
    height: 32px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.user-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 200;
}

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

.dropdown-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--gray-200);
}

.dropdown-name {
    font-weight: 600;
    color: var(--gray-900);
    font-size: var(--font-size-sm);
}

.dropdown-role {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    margin-top: 0.25rem;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.dropdown-item i {
    width: 16px;
    color: var(--gray-400);
}

.dropdown-item.text-danger {
    color: var(--danger);
}

.dropdown-item.text-danger i {
    color: var(--danger);
}

.dropdown-divider {
    height: 1px;
    background: var(--gray-200);
    margin: 0.5rem 0;
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 1.5rem;
}

/* Footer */
.main-footer {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.version {
    font-weight: 500;
    color: var(--gray-400);
}

/* ========================================
   DASHBOARD COMPONENTS
   ======================================== */
.dashboard-header {
    margin-bottom: 1.5rem;
}

.dashboard-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.subtitle {
    color: var(--gray-500);
    font-size: var(--font-size-base);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

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

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.stat-blue .stat-icon {
    background: var(--info-light);
    color: var(--info);
}

.stat-green .stat-icon {
    background: var(--success-light);
    color: var(--success);
}

.stat-orange .stat-icon {
    background: var(--warning-light);
    color: var(--warning);
}

.stat-purple .stat-icon {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-info h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
}

.stat-info p {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-weight: 500;
}

.stat-trend {
    margin-top: auto;
}

.trend-up {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--success);
    background: var(--success-light);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius);
}

.trend-up i {
    font-size: 10px;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 1.25rem;
}

.dashboard-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.dashboard-card.full-width {
    grid-column: 1 / -1;
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header h3 i {
    color: var(--primary);
}

.card-link {
    font-size: var(--font-size-sm);
    color: var(--primary);
    font-weight: 500;
}

.card-link:hover {
    text-decoration: underline;
}

.card-body {
    padding: 1.25rem 1.5rem;
}

/* Quick Actions */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    background: var(--gray-100);
    transition: var(--transition);
}

.quick-action-btn:hover {
    background: var(--gray-200);
    transform: translateY(-2px);
}

.action-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
}

.action-blue {
    background: var(--info-light);
    color: var(--info);
}

.action-green {
    background: var(--success-light);
    color: var(--success);
}

.action-orange {
    background: var(--warning-light);
    color: var(--warning);
}

.action-purple {
    background: var(--primary-light);
    color: var(--primary);
}

.quick-action-btn span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
}

/* Activity List */
.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
}

.activity-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    flex-shrink: 0;
}

.activity-details {
    flex: 1;
}

.activity-text {
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    margin-bottom: 0.25rem;
}

.activity-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-role {
    background: var(--gray-200);
    color: var(--gray-600);
}

.badge-administrator {
    background: var(--danger-light);
    color: var(--danger);
}

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

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

.badge-parent {
    background: var(--warning-light);
    color: var(--warning);
}

/* Overview Section */
.overview-grid {
    display: flex;
    align-items: center;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.overview-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.overview-icon {
    width: 48px;
    height: 48px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    font-size: var(--font-size-lg);
}

.overview-info {
    display: flex;
    flex-direction: column;
}

.overview-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
}

.overview-label {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

.overview-divider {
    width: 1px;
    height: 48px;
    background: var(--gray-200);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--gray-400);
}

.empty-state i {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.empty-state p {
    font-size: var(--font-size-sm);
}

/* ========================================
   ADDITIONAL STYLES FOR STAGES 2 & 3
   ======================================== */

/* Page Header */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
}

/* Buttons */
.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}
.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-success {
    background: var(--success);
    color: var(--white);
}
.btn-success:hover {
    background: #059669;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    color: var(--gray-500);
    transition: var(--transition);
}
.btn-icon:hover {
    background: var(--gray-100);
    color: var(--gray-700);
}
.btn-icon.text-danger:hover {
    background: var(--danger-light);
    color: var(--danger);
}
.btn-icon.text-success:hover {
    background: var(--success-light);
    color: var(--success);
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.data-table th {
    text-align: left;
    padding: 0.75rem 1rem;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}

.data-table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    vertical-align: middle;
}

.data-table tr:hover td {
    background: var(--gray-50);
}

.data-table.compact th,
.data-table.compact td {
    padding: 0.5rem 0.75rem;
}

.data-table .actions {
    display: flex;
    gap: 0.25rem;
    white-space: nowrap;
}

/* Badges */
.badge-pending { background: var(--warning-light); color: #92400e; }
.badge-partial { background: var(--info-light); color: #1e40af; }
.badge-paid { background: var(--success-light); color: #065f46; }
.badge-waived { background: var(--gray-200); color: var(--gray-600); }
.badge-success { background: var(--success-light); color: #065f46; }
.badge-failed { background: var(--danger-light); color: #991b1b; }
.badge-entered { background: var(--info-light); color: #1e40af; }
.badge-published { background: var(--success-light); color: #065f46; }
.badge-upcoming { background: var(--warning-light); color: #92400e; }
.badge-ongoing { background: var(--info-light); color: #1e40af; }
.badge-completed { background: var(--gray-200); color: var(--gray-600); }
.badge-active { background: var(--success-light); color: #065f46; }
.badge-inactive { background: var(--gray-200); color: var(--gray-600); }
.badge-suspended { background: var(--danger-light); color: #991b1b; }
.badge-graduated { background: var(--primary-light); color: var(--primary); }
.badge-transferred { background: var(--warning-light); color: #92400e; }
.badge-promoted { background: var(--success-light); color: #065f46; }
.badge-queued { background: var(--warning-light); color: #92400e; }
.badge-sent { background: var(--success-light); color: #065f46; }
.badge-delivered { background: var(--success-light); color: #065f46; }
.badge-read { background: var(--info-light); color: #1e40af; }
.badge-approved { background: var(--success-light); color: #065f46; }
.badge-rejected { background: var(--danger-light); color: #991b1b; }

/* Form Grid */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.form-grid .full-width {
    grid-column: 1 / -1;
}

.form-grid .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-grid .form-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
}

.form-grid .form-control {
    padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--gray-800);
    background: var(--white);
    transition: var(--transition);
    width: 100%;
}

.form-grid .form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.form-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-200);
}

.form-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-section h3 i {
    color: var(--primary);
}

/* Form Inline */
.form-inline {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: flex-end;
}

.form-inline .form-control {
    padding: 0.625rem 0.875rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    min-width: 200px;
}

/* Timetable */
.timetable-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.timetable-day {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 1rem;
}

.timetable-day h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.timetable-slot {
    background: var(--white);
    border-radius: var(--radius);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    position: relative;
    border: 1px solid var(--gray-200);
}

.timetable-slot .time {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
    font-weight: 500;
}

.timetable-slot .subject {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-800);
}

.timetable-slot .teacher {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}

.timetable-slot .btn-icon {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
}

.empty-slot {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    text-align: center;
    padding: 1rem;
}

/* Print layout */
@media print {
    .sidebar, .main-header, .main-footer, .no-print {
        display: none !important;
    }
    .main-content {
        margin-left: 0 !important;
    }
    .dashboard-card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}

/* Subject row for exam form */
.subject-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr 1fr auto;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}

/* Responsive */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }
    .form-inline {
        flex-direction: column;
        align-items: stretch;
    }
    .form-inline .form-control {
        min-width: auto;
    }
    .subject-row {
        grid-template-columns: 1fr;
    }
    .page-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .overview-grid {
        flex-direction: column;
    }
    
    .overview-divider {
        width: 100%;
        height: 1px;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
    
    .user-name {
        display: none;
    }
    
    .main-footer {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: 1.5rem;
    }
    
    .demo-grid {
        grid-template-columns: 1fr;
    }
    
    .content-area {
        padding: 1rem;
    }
}

/* ========================================
   ADMIN UI MODERNIZATION
   Tables, Forms, Cards, Buttons, Spacing
   ======================================== */

/* Improved Data Tables */
.data-table {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.data-table thead tr {
    background: var(--gray-100);
}

.data-table tbody tr:nth-child(even) {
    background: var(--gray-50);
}

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

.data-table tbody tr:hover {
    background: var(--primary-light) !important;
}

.data-table th {
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
    padding: 0.875rem 1rem;
    border-bottom: 2px solid var(--gray-200);
}

.data-table td {
    padding: 1rem;
    color: var(--gray-700);
    font-size: var(--font-size-sm);
    vertical-align: middle;
}

.data-table .actions {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.data-table .badge {
    font-size: 11px;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* Table Responsive Container */
.table-responsive {
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

/* Dashboard Card Improvements */
.dashboard-card {
    border-radius: var(--radius-lg);
    transition: box-shadow 0.3s ease;
}

.dashboard-card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--white);
}

.card-header h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--gray-800);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header h3 i {
    color: var(--primary);
    font-size: var(--font-size-sm);
}

.card-body {
    padding: 1.5rem;
}

/* Stat Cards - Enhanced */
.stat-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, transparent 50%, rgba(255,255,255,0.1) 50%);
    border-radius: 0 0 0 var(--radius-lg);
    pointer-events: none;
}

.stat-icon {
    transition: transform 0.3s ease;
}

.stat-card:hover .stat-icon {
    transform: scale(1.1);
}

.stat-info h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

/* Page Header Improvements */
.page-header {
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
}

.page-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

/* Button Improvements */
.btn {
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.btn:active::after {
    width: 200px;
    height: 200px;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
    border-radius: var(--radius);
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-lg);
    border-radius: var(--radius-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-300);
    color: var(--gray-800);
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--primary);
    color: var(--primary);
}

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

/* Icon Button Improvements */
.btn-icon {
    border-radius: var(--radius);
    transition: all 0.2s ease;
    width: 36px;
    height: 36px;
}

.btn-icon:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: scale(1.05);
}

.btn-icon.text-danger:hover {
    background: var(--danger-light);
    color: var(--danger);
}

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

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
    display: block;
}

.form-control {
    transition: all 0.2s ease;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--gray-300);
    border-radius: var(--radius-md);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
}

select.form-control {
    appearance: auto;
    cursor: pointer;
}

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

/* Form Grid Improvements */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.form-grid .form-group {
    margin-bottom: 0;
}

/* Dashboard Content Area */
.content-area {
    padding: 2rem;
    max-width: 1400px;
}

/* Quick Actions - Improved */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    padding: 1.5rem 1rem;
    border-radius: var(--radius-md);
    background: var(--gray-100);
    transition: all 0.3s ease;
    border: 1px solid transparent;
    text-align: center;
}

.quick-action-btn:hover {
    background: var(--white);
    border-color: var(--gray-200);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.quick-action-btn .action-icon {
    transition: transform 0.3s ease;
}

.quick-action-btn:hover .action-icon {
    transform: scale(1.15);
}

.quick-action-btn span {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--gray-700);
}

/* Activity List - Improved */
.activity-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
    transition: background 0.2s ease;
    border-radius: var(--radius);
    padding-left: 0.5rem;
    padding-right: 0.5rem;
}

.activity-item:hover {
    background: var(--gray-50);
}

.activity-item:last-child {
    border-bottom: none;
}

/* Overview Grid - Improved */
.overview-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 1rem;
    transition: transform 0.2s ease;
}

.overview-item:hover {
    transform: translateX(4px);
}

.overview-icon {
    transition: transform 0.2s ease, background 0.2s ease;
}

.overview-item:hover .overview-icon {
    background: var(--primary-light);
    color: var(--primary);
    transform: scale(1.1);
}

/* Alert Improvements */
.alert {
    border-radius: var(--radius-lg);
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-left: 4px solid transparent;
}

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

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

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

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

/* Badge Improvements */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    line-height: 1.4;
}

/* Empty State - Improved */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--gray-400);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--gray-200);
    margin: 1rem 0;
}

.empty-state i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--gray-300);
}

.empty-state p {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    font-weight: 500;
}

/* Sidebar Improvements */
.sidebar-brand {
    padding: 1.25rem 1.5rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
}

.nav-section {
    margin-bottom: 1rem;
}

.nav-label {
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-400);
    padding: 0.5rem 0.75rem;
    margin-bottom: 0.25rem;
}

.nav-item {
    margin-bottom: 0.125rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--primary);
    border-radius: 0 2px 2px 0;
    transition: height 0.2s ease;
}

.nav-item.active::before {
    height: 60%;
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

/* Header Improvements */
.main-header {
    background: var(--white);
    backdrop-filter: blur(10px);
}

.page-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
    letter-spacing: -0.02em;
}

/* User Dropdown Improvements */
.user-btn {
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    transition: all 0.2s ease;
}

.user-avatar {
    width: 36px;
    height: 36px;
    font-size: var(--font-size-sm);
    transition: transform 0.2s ease;
}

.user-btn:hover .user-avatar {
    transform: scale(1.05);
}

/* Footer Improvements */
.main-footer {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 1.25rem 2rem;
}

/* Responsive Admin */
@media (max-width: 1024px) {
    .content-area {
        padding: 1.5rem;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .content-area {
        padding: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
        font-size: var(--font-size-xs);
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .card-header {
        padding: 1rem;
    }
    
    .overview-grid {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .overview-divider {
        display: none;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .table-responsive {
        border-radius: 0;
        border: none;
    }
}