/**
 * Base Styles
 * Global application styles and utilities
 */

/* Typography & Body */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
}

/* Navigation */
.navbar-brand {
    font-weight: 600;
    font-size: 1.2rem;
}

/* Form Enhancements */
.form-control,
.form-select {
    border-radius: 0.375rem;
    border: 2px solid #e9ecef;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.1);
    transform: translateY(-1px);
}

.form-label {
    font-weight: 600;
    color: #495057;
    margin-bottom: 0.75rem;
}

/* Form Validation */
.is-invalid {
    border-color: var(--danger-color);
}

.invalid-feedback {
    display: block;
    color: var(--danger-color);
    font-size: 0.875rem;
}

.field-error {
    border-color: var(--danger-color) !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25) !important;
}

/* Utility Classes */
.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.border-start-primary {
    border-left: 4px solid var(--primary-color);
}

.bg-gradient-primary {
    background: linear-gradient(45deg, var(--primary-color), #0056b3);
}

.min-touch-target {
    min-height: 44px;
    min-width: 44px;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: "";
    position: absolute;
    top: 50%;\n    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    color: var(--secondary-color);
}

.loading-indicator i {
    margin-right: var(--spacing-sm);
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

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

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

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.5; }
}

/* Alert Enhancements */
.alert {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* Pagination */
.pagination {
    margin-bottom: 0;
}

.page-link {
    border-color: #dee2e6;
    color: var(--primary-color);
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 1050;
}

.toast {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Print Optimizations */
@media print {
    .navbar,
    .breadcrumb,
    .btn,
    .alert,
    .modal,
    .session-actions,
    .save-status {
        display: none !important;
    }
    
    .card {
        border: 1px solid #ccc;
        box-shadow: none;
        page-break-inside: avoid;
    }
    
    .lesson-row {
        border: 1px solid #ccc;
        background: white !important;
        page-break-inside: avoid;
    }
    
    .status-badge {
        background: white !important;
        color: black !important;
        border: 1px solid #ccc;
    }
    
    .lesson-entry-table {
        page-break-inside: avoid;
    }
    
    .session-header {
        background: white !important;
        border: 1px solid #ccc;
        page-break-after: avoid;
    }
}