/* Performance and Accessibility Enhancements */

/* Accessibility improvements */
@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 {
        --color-primary: #000000;
        --color-secondary: #ffffff;
        --color-accent: #ffff00;
        --color-text: #000000;
        --color-text-light: #333333;
        --color-background: #ffffff;
        --color-surface: #f0f0f0;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
    
    .card {
        border: 2px solid currentColor;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        border: 2px solid currentColor;
    }
}

/* Focus management for better keyboard navigation */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px;
    text-decoration: none;
    border-radius: 4px;
    z-index: 1000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 6px;
}

/* Enhanced focus styles */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Screen reader only content */
.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;
}

/* Loading states for better UX */
.loading {
    pointer-events: none;
    position: relative;
}

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

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Form validation enhancements */
.form-group.has-error .form-input,
.form-group.has-error .form-select,
.form-group.has-error .form-textarea {
    border-color: #dc3545;
    background-color: #fff5f5;
}

.form-group.has-success .form-input,
.form-group.has-success .form-select,
.form-group.has-success .form-textarea {
    border-color: #28a745;
    background-color: #f8fff8;
}

/* Better button states */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

/* Improved modal accessibility */
.modal[aria-hidden="true"] {
    display: none;
}

.modal[aria-hidden="false"] {
    display: flex;
}

/* Print styles for better accessibility */
@media print {
    .nav-toggle,
    .footer-social,
    .btn,
    .modal,
    .scan-lines,
    .grid-overlay {
        display: none !important;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .section {
        page-break-inside: avoid;
        margin-bottom: 20px;
    }
    
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
    
    .hero-title,
    .section-title {
        color: #000 !important;
    }
}

/* Performance optimizations */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy-load.loaded {
    opacity: 1;
}

/* Responsive images */
img {
    max-width: 100%;
    height: auto;
}

/* Content layout improvements */
.text-content {
    max-width: 65ch;
    line-height: 1.6;
}

/* Better table accessibility */
.table-wrapper {
    overflow-x: auto;
    max-width: 100%;
}

table {
    border-collapse: collapse;
    width: 100%;
}

th,
td {
    text-align: left;
    padding: 12px;
    border-bottom: 1px solid var(--color-border);
}

th {
    background-color: var(--color-surface);
    font-weight: 600;
}

/* Improved list accessibility */
ul[role="list"],
ol[role="list"] {
    list-style: none;
    padding: 0;
}

/* Color contrast improvements */
.text-muted {
    color: #6c757d;
}

@media (prefers-color-scheme: dark) {
    .text-muted {
        color: #adb5bd;
    }
}

/* Better error messages */
.form-error {
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

.form-error:empty {
    display: none;
}

/* Improved button loading states */
.btn-loading {
    display: none;
}

.btn.loading .btn-text {
    visibility: hidden;
}

.btn.loading .btn-loading {
    display: inline;
}

/* Better checkbox/radio styles */
.checkbox-input:focus + .checkbox-checkmark {
    box-shadow: 0 0 0 2px var(--color-accent);
}

/* Improved navigation for mobile */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-background);
        transition: left 0.3s ease;
        z-index: 999;
        padding-top: 80px;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-item {
        margin: 1rem 0;
    }
    
    .nav-link {
        font-size: 1.2rem;
        padding: 1rem;
    }
}

/* Content spacing improvements */
.section + .section {
    margin-top: var(--spacing-section);
}

/* Better form spacing */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* Improved animations performance */
.animate-fade-up {
    transform: translateY(30px);
    opacity: 0;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-fade-up.visible {
    transform: translateY(0);
    opacity: 1;
}

/* Better modal animations */
.modal {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    opacity: 1;
}

.modal-content {
    transform: scale(0.9) translateY(-20px);
    transition: transform 0.3s ease;
}

.modal.show .modal-content {
    transform: scale(1) translateY(0);
}

/* Improved card hover effects */
.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* Better button animations */
.btn {
    transition: all 0.3s 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 ease;
}

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