/* 
 * SmartEdu Suite - Main Styles
 * Dynamic responsive design for all devices
 */

/* Global Styles */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --border-radius: 15px;
    --box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
    --chart-bg-color: #ffffff;
    --chart-grid-color: rgba(148, 163, 184, 0.4);
    --chart-text-color: #111827;
    --chart-axis-color: #4b5563;
    --chart-primary-color: var(--primary-color);
    --chart-secondary-color: var(--success-color);
    --chart-compare-color: var(--danger-color);
    --chart-fill-primary-color: rgba(102, 126, 234, 0.15);
    --chart-fill-secondary-color: rgba(40, 167, 69, 0.1);
    --sheet-header-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --sheet-header-border: #e2e8f0;
    --sheet-thead-bg: #1a1a1a;
    --sheet-thead-text: #ffffff;
    --sheet-row-bg: #ffffff;
    --sheet-row-alt-bg: #f9fafb;
    --sheet-row-hover-bg: #e0f2fe;
    --sheet-row-border: #d1d5db;
    --sheet-student-col-bg: #f8fafc;
    --sheet-calc-col-bg: #f0f9ff;
    --sheet-result-col-bg: #fefce8;
    --sheet-total-bg: #f3f4f6;
    --sheet-total-text: #1f2937;
    --sheet-scrollbar-track: #f1f5f9;
    --sheet-scrollbar-thumb: #cbd5e1;
    --sheet-scrollbar-thumb-hover: #94a3b8;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    box-shadow: var(--box-shadow);
    border-bottom: 3px solid rgba(255,255,255,0.1);
}

.navbar-brand, 
.nav-link {
    color: white !important;
    font-weight: 500;
    transition: var(--transition);
}

/* Navbar links on gradient background: transparent by default */
.navbar .nav-link {
    background-color: transparent;
    border-radius: 0.75rem;
    padding: 0.45rem 1.05rem;
}

.navbar-brand:hover,
.nav-link:hover {
    color: rgba(255,255,255,0.9) !important;
    transform: none;
}

/* Hover/focus: subtle translucent highlight, no solid white box */
.navbar .nav-link:hover,
.navbar .nav-link:focus {
    background-color: rgba(255,255,255,0.10);
}

/* Active/current page: slightly stronger highlight */
.navbar .nav-link.active,
.navbar .nav-link.show {
    background-color: rgba(255,255,255,0.22) !important;
    color: #ffffff !important;
}

.dropdown-menu {
    border: none;
    box-shadow: var(--box-shadow);
    border-radius: 10px;
    margin-top: 10px;
    background: #ffffff;
}

.dropdown-item {
    transition: var(--transition);
    border-radius: 5px;
    margin: 2px 5px;
    color: #212529;
}

.dropdown-item:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #ffffff;
    transform: none;
}

/* Cards and Containers */
.card {
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: none;
    transition: var(--transition);
    background: white;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.card-header {
    background: linear-gradient(135deg, var(--light-color), #e9ecef);
    border-bottom: 2px solid var(--primary-color);
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
    font-weight: 600;
}

/* Buttons */
.btn {
    border-radius: 10px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    padding: 8px 20px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #20c997);
    box-shadow: 0 2px 10px rgba(40, 167, 69, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(40, 167, 69, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #e74c3c);
    box-shadow: 0 2px 10px rgba(220, 53, 69, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(220, 53, 69, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #f39c12);
    color: #212529;
    box-shadow: 0 2px 10px rgba(255, 193, 7, 0.3);
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(255, 193, 7, 0.4);
    color: #212529;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #3498db);
    box-shadow: 0 2px 10px rgba(23, 162, 184, 0.3);
}

.btn-info:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(23, 162, 184, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.btn-outline-secondary {
    border: 2px solid var(--dark-color);
    color: var(--dark-color);
}

.btn-outline-secondary:hover {
    background: var(--dark-color);
    border-color: var(--dark-color);
    transform: translateY(-2px);
}

/* Forms */
.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 10px 15px;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    transform: translateY(-1px);
}

.form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 10px 15px;
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 8px;
}

/* Tables */
.table {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    background: white;
}

.table thead th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    font-weight: 600;
    padding: 15px;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(102, 126, 234, 0.05);
    transform: scale(1.01);
}

.table tbody td {
    padding: 12px 15px;
    border-color: #e9ecef;
    vertical-align: middle;
}
 
/* Super Admin Dashboard Enhancements */
.super-admin-dashboard {
    padding-bottom: 1.5rem;
}

/* Ensure super admin tables never look disabled/greyed */
.super-admin-dashboard .card-body .table-responsive {
    filter: none;
    opacity: 1;
    background: transparent;
}

.super-admin-dashboard .table {
    background: #ffffff;
    box-shadow: var(--box-shadow);
}

.super-admin-dashboard .table thead th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.super-admin-dashboard .table tbody tr {
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.super-admin-dashboard .table tbody tr:hover {
    background-color: rgba(102, 126, 234, 0.06);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

/* Super admin nav tabs as clear buttons with hover */
.super-admin-dashboard .nav-tabs {
    border-bottom: none;
    gap: 0.5rem;
}

.super-admin-dashboard .nav-tabs .nav-link {
    border: none;
    border-radius: 999px;
    background-color: rgba(15, 23, 42, 0.04);
    color: #1f2937 !important; /* override global .nav-link { color: white !important; } */
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.9rem;
}

.super-admin-dashboard .nav-tabs .nav-link i {
    color: inherit !important;
    opacity: 0.9;
}

.super-admin-dashboard .nav-tabs .nav-link .badge {
    pointer-events: none;
}

.super-admin-dashboard .nav-tabs .nav-link.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #ffffff;
}

.super-admin-dashboard .nav-tabs .nav-link:hover:not(.active) {
    background-color: rgba(102, 126, 234, 0.16);
}

/* Stronger, more visible action buttons */
.super-admin-dashboard .btn-outline-primary {
    border-width: 1.5px;
    color: var(--primary-color);
}

.super-admin-dashboard .btn-outline-primary:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}

.super-admin-dashboard .card-header h5 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.super-admin-dashboard .card-header h5 .bi {
    font-size: 1.1rem;
}

/* Badges */
.badge {
    border-radius: 8px;
    font-weight: 500;
    padding: 6px 12px;
}

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--box-shadow);
    padding: 15px 20px;
}

.alert-success {
    background: linear-gradient(135deg, rgba(40, 167, 69, 0.1), rgba(32, 201, 151, 0.1));
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1), rgba(231, 76, 60, 0.1));
    color: var(--danger-color);
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.1), rgba(243, 156, 18, 0.1));
    color: #856404;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, rgba(23, 162, 184, 0.1), rgba(52, 152, 219, 0.1));
    color: var(--info-color);
    border-left: 4px solid var(--info-color);
}

/* Animations */
.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
}

.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container-fluid {
        padding: 15px;
    }
    
    .card {
        margin-bottom: 20px;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .btn-group .btn {
        width: auto;
        margin-bottom: 0;
    }
    
    .table-responsive {
        font-size: 14px;
    }
    
    .navbar-nav {
        text-align: center;
    }
    
    .dropdown-menu {
        position: static !important;
        transform: none !important;
        border: none;
        box-shadow: none;
        background: #ffffff;
        margin: 10px 0;
    }
    
    .dropdown-item {
        color: #212529 !important;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding: 10px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .btn {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    .table {
        font-size: 12px;
    }
    
    .form-control,
    .form-select {
        padding: 8px 12px;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --light-color: #2c3e50;
        --dark-color: #ecf0f1;
        --chart-bg-color: #111827;
        --chart-grid-color: rgba(55, 65, 81, 0.7);
        --chart-text-color: #e5e7eb;
        --chart-axis-color: #d1d5db;
        --chart-primary-color: #60a5fa;
        --chart-secondary-color: #34d399;
        --chart-compare-color: #f87171;
        --chart-fill-primary-color: rgba(96, 165, 250, 0.25);
        --chart-fill-secondary-color: rgba(52, 211, 153, 0.18);
        --sheet-header-bg: linear-gradient(135deg, #020617 0%, #0f172a 100%);
        --sheet-header-border: #0f172a;
        --sheet-thead-bg: #020617;
        --sheet-thead-text: #e5e7eb;
        --sheet-row-bg: #020617;
        --sheet-row-alt-bg: #0f172a;
        --sheet-row-hover-bg: #1e293b;
        --sheet-row-border: #1f2937;
        --sheet-student-col-bg: #020617;
        --sheet-calc-col-bg: #0b1120;
        --sheet-result-col-bg: #111827;
        --sheet-total-bg: #020617;
        --sheet-total-text: #e5e7eb;
        --sheet-scrollbar-track: #020617;
        --sheet-scrollbar-thumb: #374151;
        --sheet-scrollbar-thumb-hover: #4b5563;
    }
    
    body {
        background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
        color: #ecf0f1;
    }
    
    .card {
        background: #34495e;
        color: #ecf0f1;
    }

    .card-header {
        background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
        border-bottom-color: #4b5563;
    }
    
    .card-text,
    .text-muted {
        color: rgba(236, 240, 241, 0.78) !important;
    }

    .text-success {
        color: #4ade80 !important;
    }

    .text-info {
        color: #38bdf8 !important;
    }

    .text-warning {
        color: #facc15 !important;
    }

    .text-danger {
        color: #fb7185 !important;
    }
    
    .table {
        background: #34495e;
        color: #ecf0f1;
    }
    
    .table thead th {
        background: #2c3e50;
        color: #ecf0f1;
    }

    .table tbody tr:hover {
        background-color: #1e293b;
    }

    .table tbody td {
        border-color: #1f2937;
    }

    .table-light th {
        background-color: #111827;
        color: #ecf0f1;
    }
    
    .form-label,
    label,
    .form-text {
        color: #ecf0f1;
    }
    
    .form-control,
    .form-select {
        background: #2c3e50;
        border-color: #34495e;
        color: #ecf0f1;
    }
    
    .form-control:focus,
    .form-select:focus {
        background: #2c3e50;
        color: #ecf0f1;
    }
    
    .modal-content {
        background-color: #34495e;
        color: #ecf0f1;
    }
    
    .modal-header,
    .modal-footer {
        background-color: #2c3e50;
        border-color: #1f2933;
    }
    
    .navbar {
        background: linear-gradient(135deg, #111827 0%, #1f2937 100%);
    }
    
    .navbar .nav-link,
    .navbar-brand {
        color: #ecf0f1 !important;
    }

    .badge.bg-primary {
        background-color: #3b82f6;
    }

    .badge.bg-success {
        background-color: #22c55e;
    }

    .badge.bg-info {
        background-color: #0ea5e9;
    }

    .badge.bg-warning {
        background-color: #facc15;
        color: #111827;
    }

    .badge.bg-danger {
        background-color: #ef4444;
    }
    
    body.auth-login-page .login-card {
        background-color: rgba(15, 23, 42, 0.96);
        color: #ecf0f1;
    }

    body.auth-login-page .login-title {
        color: #ecf0f1;
    }

    body.auth-login-page .login-subtitle,
    body.auth-login-page .login-card .text-muted {
        color: rgba(236, 240, 241, 0.78);
    }

    body.auth-login-page .login-card .form-control {
        background-color: #111827;
        border-color: #1f2937;
        color: #ecf0f1;
    }

    body.auth-login-page .login-card .form-control::placeholder {
        color: rgba(156, 163, 175, 0.9);
    }

    body.auth-signup-page .card {
        background-color: rgba(15, 23, 42, 0.96);
        color: #ecf0f1;
    }

    body.auth-signup-page .card .text-muted {
        color: rgba(236, 240, 241, 0.78);
    }

    body.auth-signup-page .card .form-control {
        background-color: #111827;
        border-color: #1f2937;
        color: #ecf0f1;
    }

    body.auth-signup-page .card .form-control::placeholder {
        color: rgba(156, 163, 175, 0.9);
    }

    /* Teacher dashboard tweaks */
    .score-progress-card .card-body {
        background-color: #1f2937;
        color: #ecf0f1;
    }

    .score-progress-card .card-body .small,
    .score-progress-card .card-body .text-muted {
        color: rgba(236, 240, 241, 0.78) !important;
    }

    .score-progress-card .progress {
        background-color: #111827;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
}

.shadow-lg {
    box-shadow: 0 10px 30px rgba(0,0,0,0.15) !important;
}

.rounded-lg {
    border-radius: var(--border-radius) !important;
}

.border-primary {
    border-color: var(--primary-color) !important;
}

.border-2 {
    border-width: 2px !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}