/* Teacher Minimal Design - Clean and Modern Interface */

/* Custom Variables */
:root {
    --teacher-primary: #4f46e5;
    --teacher-secondary: #64748b;
    --teacher-success: #10b981;
    --teacher-warning: #f59e0b;
    --teacher-danger: #ef4444;
    --teacher-info: #06b6d4;
    --teacher-light: #f8fafc;
    --teacher-dark: #1e293b;
    --teacher-border: #e2e8f0;
    --teacher-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --teacher-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Base Styles */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f8fafc;
    color: var(--teacher-dark);
}

/* Card Enhancements */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: var(--teacher-shadow);
    transition: all 0.2s ease-in-out;
}

.card:hover {
    box-shadow: var(--teacher-shadow-lg);
    transform: translateY(-1px);
}

.card-header {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-bottom: 1px solid var(--teacher-border);
    border-radius: 12px 12px 0 0 !important;
    padding: 1.25rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

/* Button Enhancements */
.btn {
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s ease-in-out;
    border: none;
    padding: 0.5rem 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--teacher-primary) 0%, #6366f1 100%);
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #4338ca 0%, #5b21b6 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(79, 70, 229, 0.3);
}

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

.btn-outline-primary:hover {
    background: var(--teacher-primary);
    color: white;
    transform: translateY(-1px);
}

.btn-outline-secondary {
    border: 1px solid var(--teacher-border);
    color: var(--teacher-secondary);
    background: white;
}

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

/* Form Enhancements */
.form-control, .form-select {
    border: 1px solid var(--teacher-border);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease-in-out;
    background-color: white;
}

.form-control:focus, .form-select:focus {
    border-color: var(--teacher-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    background-color: white;
}

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

/* Table Enhancements */
.table {
    border-collapse: separate;
    border-spacing: 0;
}

.table thead th {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: none;
    font-weight: 600;
    color: var(--teacher-dark);
    padding: 1rem 0.75rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr {
    transition: all 0.2s ease-in-out;
}

.table tbody tr:hover {
    background-color: rgba(79, 70, 229, 0.02);
    transform: scale(1.001);
}

.table tbody td {
    padding: 1rem 0.75rem;
    border: none;
    border-bottom: 1px solid var(--teacher-border);
    vertical-align: middle;
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* Badge Enhancements */
.badge {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--teacher-primary) 0%, #6366f1 100%) !important;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--teacher-success) 0%, #059669 100%) !important;
}

.badge.bg-warning {
    background: linear-gradient(135deg, var(--teacher-warning) 0%, #d97706 100%) !important;
}

.badge.bg-danger {
    background: linear-gradient(135deg, var(--teacher-danger) 0%, #dc2626 100%) !important;
}

.badge.bg-info {
    background: linear-gradient(135deg, var(--teacher-info) 0%, #0891b2 100%) !important;
}

.badge.bg-secondary {
    background: linear-gradient(135deg, var(--teacher-secondary) 0%, #475569 100%) !important;
}

/* Icon Enhancements */
.bi {
    font-size: 1rem;
}

.fs-1 {
    font-size: 2.5rem !important;
}

.fs-6 {
    font-size: 0.875rem !important;
}

/* Text Enhancements */
.text-muted {
    color: #64748b !important;
}

.fw-medium {
    font-weight: 500 !important;
}

.fw-bold {
    font-weight: 600 !important;
}

/* Header Enhancements */
.h4 {
    font-weight: 600;
    color: var(--teacher-dark);
}

.h5 {
    font-weight: 600;
    color: var(--teacher-dark);
}

/* Summary Cards */
.card .card-body.text-center {
    padding: 2rem 1.5rem;
}

.card .card-body.text-center .fs-1 {
    margin-bottom: 0.5rem;
}

.card .card-body.text-center .h4,
.card .card-body.text-center .h3 {
    font-weight: 700;
    margin-bottom: 0;
}

/* Empty State */
.text-center.py-5 {
    padding: 4rem 2rem !important;
}

.text-center.py-5 .fs-1 {
    opacity: 0.5;
}

/* Responsive Enhancements */
@media (max-width: 768px) {
    .card-body {
        padding: 1rem;
    }
    
    .table-responsive {
        border-radius: 8px;
    }
    
    .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
    
    .fs-1 {
        font-size: 2rem !important;
    }
}

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

.card {
    animation: fadeInUp 0.3s ease-out;
}

/* Custom Scrollbar */
.table-responsive::-webkit-scrollbar {
    height: 6px;
}

.table-responsive::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 3px;
}

.table-responsive::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.table-responsive::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Focus States */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Loading States */
.btn.loading {
    position: relative;
    color: transparent !important;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Print Styles */
@media print {
    .btn,
    .card-header,
    .card-footer {
        display: none !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    .table {
        font-size: 12px;
    }
}