/* Comprehensive Website Improvements - CSS Enhancements */

/* 1. Dark Mode Support */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --accent-color: #ff6b35;
    --secondary-color: #f7931e;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --accent-color: #ff8c42;
    --secondary-color: #ffa726;
    --border-color: #333333;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

/* 2. Performance Optimizations */
img {
    transition: opacity 0.3s ease;
}

img[data-src] {
    opacity: 0;
}

img[data-src].loaded {
    opacity: 1;
}

/* 3. 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;
}

/* 4. Modern UX Features */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 20px var(--shadow-color);
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
    transform: translateY(100px);
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 5. Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 6. Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--accent-color);
    z-index: 1001;
    transition: width 0.1s ease;
}

/* 7. Enhanced Animations */
.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 0.5s ease-out;
}

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

/* 8. Responsive Improvements */
@media (max-width: 768px) {
    .theme-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
    
    .back-to-top {
        bottom: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
}

/* 9. Form Enhancements */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
}

.error-message {
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.success-message {
    color: #27ae60;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* 10. Toast Notifications */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 4px;
    box-shadow: 0 4px 12px var(--shadow-color);
    z-index: 1002;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.toast.show {
    transform: translateX(0);
}

/* 11. Enhanced Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    padding: 1rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--shadow-color);
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

/* 12. Enhanced Navigation */
.main-nav {
    transition: transform 0.3s ease;
}

.main-nav.open {
    transform: translateX(0);
}

/* 13. Performance Optimizations */
.prefetch {
    display: none;
}

/* 14. Accessibility Focus Styles */
*:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* 15. Print Styles */
@media print {
    .theme-toggle,
    .back-to-top,
    .scroll-progress {
        display: none;
    }
}