/* ==========================================================================
   Modern CSS Enhancements for AlphaEssays Theme
   ========================================================================== */

/* Modern Card Components */
.card {
    background: white;
    border-radius: var(--border-radius, 4px);
    box-shadow: var(--shadow-light, 0 2px 4px rgba(0, 0, 0, 0.1));
    padding: 1.5rem;
    transition: all var(--transition-base, 0.3s ease);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium, 0 4px 8px rgba(0, 0, 0, 0.15));
}

.card-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color, #efefef);
}

.card-title {
    margin: 0;
    color: var(--secondary-color, #001f3f);
}

.card-body {
    flex: 1;
}

.card-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color, #efefef);
}

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

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color, #efefef);
    border-top: 2px solid var(--primary-color, #0074D9);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Modern Form Enhancements */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--secondary-color, #001f3f);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius, 4px);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-base, 0.3s ease);
}

.form-control:focus {
    border-color: var(--primary-color, #0074D9);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 116, 217, 0.1);
}

.form-control.error {
    border-color: #dc3545;
}

.form-control.success {
    border-color: #28a745;
}

.form-feedback {
    margin-top: 0.25rem;
    font-size: 0.875rem;
}

.form-feedback.error {
    color: #dc3545;
}

.form-feedback.success {
    color: #28a745;
}

/* Modern Alert Components */
.alert {
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: var(--border-radius, 4px);
    position: relative;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: #bee5eb;
    color: #0c5460;
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeaa7;
    color: #856404;
}

.alert-error {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.alert-dismissible {
    padding-right: 4rem;
}

.alert-close {
    position: absolute;
    top: 0;
    right: 0;
    padding: 1rem 1.5rem;
    background: none;
    border: none;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
    color: inherit;
    opacity: 0.5;
    cursor: pointer;
    transition: opacity var(--transition-base, 0.3s ease);
}

.alert-close:hover {
    opacity: 0.75;
}

/* Modern Progress Indicators */
.progress {
    display: flex;
    height: 1rem;
    overflow: hidden;
    background-color: #e9ecef;
    border-radius: var(--border-radius, 4px);
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: white;
    text-align: center;
    white-space: nowrap;
    background-color: var(--primary-color, #0074D9);
    transition: width var(--transition-base, 0.3s ease);
}

/* Modern Badge Component */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 0.25rem;
    background-color: var(--primary-color, #0074D9);
    color: white;
}

.badge-secondary {
    background-color: var(--secondary-color, #001f3f);
}

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

.badge-warning {
    background-color: #ffc107;
    color: #212529;
}

.badge-error {
    background-color: #dc3545;
}

/* Modern Responsive Images */
.img-responsive {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius, 4px);
}

.img-circle {
    border-radius: 50%;
}

.img-thumbnail {
    padding: 0.25rem;
    background-color: white;
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius, 4px);
    max-width: 100%;
    height: auto;
}

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

/* Focus indicators for better accessibility */
.focus-visible {
    outline: 2px solid var(--primary-color, #0074D9);
    outline-offset: 2px;
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-color: #000000;
        --primary-color: #0000FF;
        --secondary-color: #000000;
    }
}

/* Dark mode preferences */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #1a1a1a;
        --text-color: #e0e0e0;
        --footer-background: #2a2a2a;
        --border-color: #404040;
    }
    
    .card,
    .form-control,
    header {
        background-color: #2a2a2a;
        color: var(--text-color);
        border-color: var(--border-color);
    }
}