/* Landing Page Improvements CSS */
/* Enhanced styling for better user experience and security */

/* Loading States */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn .fa-spinner {
    animation: spin 1s linear infinite;
}

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

/* Form Validation Enhancements */
.form-control.is-invalid {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.form-control.is-valid {
    border-color: #28a745;
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

.invalid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #dc3545;
}

.valid-feedback {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875rem;
    color: #28a745;
}

/* Auto-save Indicator */
.toast {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* Security Enhancements */
.file-upload-security {
    position: relative;
}

.file-upload-security::before {
    content: "🔒";
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 1.2rem;
    z-index: 1;
}

/* Accessibility Improvements */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus indicators */
.form-control:focus,
.form-select:focus,
.btn:focus {
    outline: 2px solid #0d6efd;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .form-control {
        border-width: 2px;
    }
    
    .btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .btn .fa-spinner {
        animation: none;
    }
    
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Responsive Improvements */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
    }
    
    .form-floating > label {
        font-size: 0.9rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .btn-group .btn {
        width: auto;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .form-control,
    .form-select {
        font-size: 16px; /* Prevent zoom on iOS */
    }
}

/* Touch Improvements */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px; /* Minimum touch target size */
        min-width: 44px;
    }
    
    .form-control,
    .form-select {
        min-height: 44px;
    }
    
    .card:hover {
        transform: none; /* Disable hover effects on touch devices */
    }
}

/* Touch Active State */
.touch-active {
    transform: scale(0.98);
    transition: transform 0.1s ease;
}

/* Table Responsive */
.table-responsive {
    border-radius: 0.375rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.table-responsive::-webkit-scrollbar {
    height: 8px;
}

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

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

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

/* Notification Styles */
.alert {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.1);
    border-left: 4px solid #28a745;
    color: #155724;
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    border-left: 4px solid #dc3545;
    color: #721c24;
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 4px solid #ffc107;
    color: #856404;
}

.alert-info {
    background-color: rgba(13, 202, 240, 0.1);
    border-left: 4px solid #0dcaf0;
    color: #055160;
}

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

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 0.25rem solid #f3f3f3;
    border-top: 0.25rem solid #0d6efd;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Form Enhancements */
.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
    opacity: 0.65;
    transform: scale(0.85) translateY(-0.5rem) translateX(0.15rem);
}

.form-floating > .form-control:focus {
    padding-top: 1.625rem;
    padding-bottom: 0.625rem;
}

/* Card Hover Effects */
.card {
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.125);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

/* Button Enhancements */
.btn {
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover:before {
    left: 100%;
}

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

.badge-pending {
    background-color: #ffc107;
    color: #000;
}

.badge-approved {
    background-color: #28a745;
    color: #fff;
}

.badge-rejected {
    background-color: #dc3545;
    color: #fff;
}

/* Print Styles */
@media print {
    .btn,
    .alert,
    .toast {
        display: none !important;
    }
    
    .card {
        border: 1px solid #000 !important;
        box-shadow: none !important;
    }
    
    .table {
        border-collapse: collapse !important;
    }
    
    .table th,
    .table td {
        border: 1px solid #000 !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .card {
        background-color: #2d3748;
        border-color: #4a5568;
        color: #e2e8f0;
    }
    
    .form-control,
    .form-select {
        background-color: #4a5568;
        border-color: #718096;
        color: #e2e8f0;
    }
    
    .form-control:focus,
    .form-select:focus {
        background-color: #4a5568;
        border-color: #63b3ed;
        color: #e2e8f0;
        box-shadow: 0 0 0 0.2rem rgba(99, 179, 237, 0.25);
    }
    
    .table {
        color: #e2e8f0;
    }
    
    .table-striped > tbody > tr:nth-of-type(odd) > td {
        background-color: rgba(255, 255, 255, 0.05);
    }
}

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

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

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

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

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

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

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

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

.text-truncate-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.shadow-sm {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075) !important;
}

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

.shadow-lg {
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
}