/*
Intern Validation Application - Main CSS
Basic styling for functionality and improved user experience
*/

/* Custom CSS Variables */
:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #0dcaf0;
    --light-gray: #f8f9fa;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --transition: all 0.2s ease-in-out;
}

/* General Body Styling */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.loading-content {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* Navigation Enhancements */
.navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    transform: translateY(-1px);
}

.navbar-nav .nav-link.active {
    font-weight: 600;
}

/* Card Enhancements */
.card {
    border: none;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.card-header {
    background-color: white;
    border-bottom: 1px solid #dee2e6;
    font-weight: 600;
}

/* Statistics Cards */
.card.border-primary:hover {
    border-color: var(--primary-color) !important;
    transform: translateY(-2px);
}

.card.border-success:hover {
    border-color: var(--success-color) !important;
    transform: translateY(-2px);
}

.card.border-warning:hover {
    border-color: var(--warning-color) !important;
    transform: translateY(-2px);
}

.card.border-info:hover {
    border-color: var(--info-color) !important;
    transform: translateY(-2px);
}

/* Form Enhancements */
.form-control, .form-select {
    border: 1px solid #ced4da;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* File Input Styling */
.form-control[type="file"] {
    padding: 0.375rem 0.75rem;
}

.form-control[type="file"]::-webkit-file-upload-button {
    background-color: var(--light-gray);
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    padding: 0.375rem 0.75rem;
    margin-right: 0.75rem;
    transition: var(--transition);
}

.form-control[type="file"]::-webkit-file-upload-button:hover {
    background-color: #e9ecef;
}

/* Button Enhancements */
.btn {
    font-weight: 500;
    transition: var(--transition);
    border-radius: var(--border-radius);
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

/* Progress Bar Enhancements */
.progress {
    height: 1rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: #e9ecef;
}

.progress-bar {
    transition: width 0.3s ease;
}

/* Table Enhancements */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    border-top: none;
    border-bottom: 2px solid #dee2e6;
    padding: 0.75rem;
}

.table td {
    padding: 0.75rem;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.025);
}

.table-responsive {
    border-radius: var(--border-radius);
}

/* Badge Enhancements */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
    padding: 0.35em 0.65em;
}

/* Status-specific styling */
.badge.bg-success {
    background-color: var(--success-color) !important;
}

.badge.bg-warning {
    background-color: var(--warning-color) !important;
    color: #000 !important;
}

.badge.bg-danger {
    background-color: var(--danger-color) !important;
}

.badge.bg-info {
    background-color: var(--info-color) !important;
    color: #000 !important;
}

/* Alert Enhancements */
.alert {
    border: none;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.alert-dismissible .btn-close {
    padding: 0.75rem 1rem;
}

/* Modal Enhancements */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.2);
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    padding: 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid #dee2e6;
    padding: 1rem 1.5rem;
}

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

.page-link {
    border: 1px solid #dee2e6;
    color: var(--primary-color);
    transition: var(--transition);
}

.page-link:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
    color: var(--primary-color);
}

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

/* Search and Filter Section */
.input-group .btn {
    border-left: none;
}

.form-text {
    font-size: 0.875rem;
    color: #6c757d;
    margin-top: 0.25rem;
}

/* File Information Display */
.file-info-card {
    background-color: var(--light-gray);
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 0.5rem;
}

/* Statistics Display */
.display-4 {
    margin-bottom: 0.5rem;
}

.text-muted {
    color: #6c757d !important;
}

/* Button Groups */
.btn-group-sm .btn {
    margin-right: 0.25rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-group-sm .btn:last-child {
    margin-right: 0;
}

/* Tooltips */
.tooltip {
    font-size: 0.875rem;
}

/* Footer Styling */
footer {
    background-color: var(--light-gray) !important;
    border-top: 1px solid #dee2e6;
    margin-top: auto;
}

/* Responsive Design Enhancements */
@media (max-width: 768px) {
    .container-fluid {
        padding-left: 15px;
        padding-right: 15px;
    }

    .card-body {
        padding: 1rem;
    }

    .table-responsive {
        font-size: 0.875rem;
    }

    .btn-group-sm .btn {
        padding: 0.2rem 0.4rem;
        font-size: 0.8rem;
    }

    .display-4 {
        font-size: 2rem;
    }

    .modal-dialog {
        margin: 0.5rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.1rem;
    }

    .card-header h5 {
        font-size: 1rem;
    }

    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }

    .table th, .table td {
        padding: 0.5rem;
        font-size: 0.8rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

.slide-up {
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Custom Utility Classes */
.cursor-pointer {
    cursor: pointer;
}

.border-dashed {
    border-style: dashed !important;
}

.text-nowrap {
    white-space: nowrap;
}

.overflow-hidden {
    overflow: hidden;
}

/* Focus Styles for Accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

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

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Success States */
.is-valid {
    border-color: var(--success-color);
}

.valid-feedback {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* Search Functionality Styles */
.search-input-container {
    position: relative;
}

.search-suggestions-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border: 1px solid #dee2e6;
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    z-index: 1000;
    max-height: 300px;
    overflow-y: auto;
}

.search-suggestion {
    padding: 0.75rem 1rem;
    cursor: pointer;
    border-bottom: 1px solid #f8f9fa;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.search-suggestion:hover,
.search-suggestion.active {
    background-color: var(--light-gray);
}

.search-suggestion:last-child {
    border-bottom: none;
}

.search-suggestion i {
    color: #6c757d;
    width: 16px;
}

.search-suggestion small {
    font-size: 0.75rem;
    text-transform: uppercase;
}

.search-highlight {
    background-color: #fff3cd;
    padding: 0.1em 0.2em;
    border-radius: 0.2em;
}

/* Search Input Focus States */
.search-input-container input:focus {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.search-input-container input:focus + .search-suggestions-dropdown {
    border-top: 1px solid var(--primary-color);
}

/* Search Loading State */
.search-loading {
    position: relative;
}

.search-loading::after {
    content: '';
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 1rem;
    height: 1rem;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translateY(-50%) rotate(0deg); }
    100% { transform: translateY(-50%) rotate(360deg); }
}

/* Print Styles */
@media print {
    .no-print,
    .navbar,
    .btn,
    footer {
        display: none !important;
    }

    .card {
        border: 1px solid #dee2e6 !important;
        box-shadow: none !important;
    }

    .table {
        border-collapse: collapse;
    }

    .table th,
    .table td {
        border: 1px solid #dee2e6;
    }
}