/* Main Styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

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

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 1);
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: box-shadow 0.15s ease-in-out;
}

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

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

/* Buttons */
.btn {
    border-radius: 0.375rem;
    font-weight: 500;
    transition: all 0.15s ease-in-out;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

/* Forms */
.form-control {
    border-radius: 0.375rem;
    border: 1px solid #ced4da;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* Tables */
.table {
    border-radius: 0.375rem;
    overflow: hidden;
}

.table th {
    border-top: none;
    font-weight: 600;
    color: #495057;
    background-color: #f8f9fa;
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 0.375rem 0.75rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.alert-heading {
    font-weight: 600;
}

/* Progress bars */
.progress {
    border-radius: 0.375rem;
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: 0.375rem;
}

/* Dropdowns */
.dropdown-menu {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    border-radius: 0.5rem;
}

.dropdown-item {
    padding: 0.5rem 1rem;
    transition: background-color 0.15s ease-in-out;
}

.dropdown-item:hover {
    background-color: #f8f9fa;
}

/* Modals */
.modal-content {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    border-radius: 0.5rem 0.5rem 0 0;
}

.modal-footer {
    border-top: 1px solid #dee2e6;
    border-radius: 0 0 0.5rem 0.5rem;
}

/* Custom utilities */
.text-primary {
    color: var(--primary-color) !important;
}

.text-success {
    color: var(--success-color) !important;
}

.text-warning {
    color: var(--warning-color) !important;
}

.text-danger {
    color: var(--danger-color) !important;
}

.text-info {
    color: var(--info-color) !important;
}

/* Border utilities */
.border-left-primary {
    border-left: 4px solid var(--primary-color) !important;
}

.border-left-success {
    border-left: 4px solid var(--success-color) !important;
}

.border-left-warning {
    border-left: 4px solid var(--warning-color) !important;
}

.border-left-danger {
    border-left: 4px solid var(--danger-color) !important;
}

.border-left-info {
    border-left: 4px solid var(--info-color) !important;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

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

/* Footer */
footer {
    background-color: var(--dark-color) !important;
    color: #ffffff;
}

footer a {
    color: #ffffff;
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}

footer a:hover {
    color: #e9ecef;
}

/* Responsive utilities */
@media (max-width: 768px) {
    .btn-group-vertical .btn {
        margin-bottom: 0.25rem;
    }
    
    .table-responsive {
        border: none;
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* Print styles */
@media print {
    .navbar,
    .btn,
    .modal,
    footer {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
}

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

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

.slide-in {
    animation: slideIn 0.3s ease-in-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Status indicators */
.status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.status-indicator::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background-color: currentColor;
}

/* File icons */
.file-icon {
    font-size: 1.25rem;
    margin-right: 0.5rem;
}

.file-icon.word {
    color: #2b579a;
}

.file-icon.pdf {
    color: #d32f2f;
}

.file-icon.excel {
    color: #217346;
}

/* Tooltips */
[data-bs-toggle="tooltip"] {
    cursor: help;
}

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

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

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Character counter */
.char-counter {
    text-align: right;
    margin-top: 0.25rem;
}

/* Required field indicator */
.form-label.required::after {
    content: ' *';
    color: var(--danger-color);
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

/* Success states */
.success-state {
    color: var(--success-color);
    background-color: rgba(40, 167, 69, 0.1);
    border: 1px solid rgba(40, 167, 69, 0.2);
    border-radius: 0.375rem;
    padding: 0.75rem;
}

/* Error states */
.error-state {
    color: var(--danger-color);
    background-color: rgba(220, 53, 69, 0.1);
    border: 1px solid rgba(220, 53, 69, 0.2);
    border-radius: 0.375rem;
    padding: 0.75rem;
}

/* Focus styles for accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid transparent;
    outline-offset: 2px;
}

/* Dark mode support (optional) */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #121212;
        color: #ffffff;
    }
    
    .card {
        background-color: #1e1e1e;
        color: #ffffff;
    }
    
    .table {
        --bs-table-bg: #1e1e1e;
        --bs-table-color: #ffffff;
    }
}