/* Common styles for header and footer components */

/* 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;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: 0 0 4px 0;
    z-index: 2000;
}

.skip-link:focus {
    top: 0;
}

/* Global focus-visible for better accessibility */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
    border-radius: 4px;
}

/* CSS Variables */
:root {
    /* Core Brand Palette */
    --primary: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #A5D6A7;
    --accent: #009688;
    --warning: #FFB300;
    --error: #E53935;
    --info: #2196F3;
    --success: #66BB6A;
    
    /* Neutrals */
    --bg-light: #FAFAFA;
    --text-primary: #212121;
    --text-secondary: #B3B3B3; /* Improved contrast from #A8A8A8 */
    --border: #E0E0E0;
    
    /* Dark Mode */
    --bg-dark: #121212;
    --bg-dark-elevated: #1E1E1E;
    --bg-dark-card: #2C2C2C;
    --text-primary-dark: #EDEDED;
    --text-secondary-dark: #A8A8A8;
    --border-dark: rgba(255, 255, 255, 0.12);
}

/* Navigation Header */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(18, 18, 18, 0.95);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-dark);
    transition: all 0.3s ease;
    
    /* iOS Safe Area Support */
    padding-top: env(safe-area-inset-top);
    padding-top: constant(safe-area-inset-top); /* iOS 11.0-11.2 */
}

/* Standalone PWA mode adjustments */
@supports (display-mode: standalone) {
    @media (display-mode: standalone) {
        nav {
            padding-top: calc(16px + env(safe-area-inset-top));
            padding-top: calc(16px + constant(safe-area-inset-top));
        }
        
        /* Adjust mobile menu in standalone mode */
        @media (max-width: 768px) {
            .nav-menu {
                top: calc(81px + env(safe-area-inset-top));
                top: calc(81px + constant(safe-area-inset-top));
            }
            
            .nav-menu a {
                font-size: 18px;
            }
        }
    }
}

/* iOS PWA specific - detected via JavaScript */
.pwa-standalone nav {
    padding-top: calc(16px + env(safe-area-inset-top));
    padding-top: calc(16px + constant(safe-area-inset-top));
}

.pwa-standalone .nav-menu {
    top: calc(81px + env(safe-area-inset-top)) !important;
    top: calc(81px + constant(safe-area-inset-top)) !important;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Adjust container padding in standalone mode */
@supports (display-mode: standalone) {
    @media (display-mode: standalone) {
        .nav-container {
            padding-top: 16px;
            padding-bottom: 16px;
        }
    }
}

.logo {
    height: 32px;
    width: auto;
    display: block;
    transition: opacity 0.2s ease;
}

.nav-container > a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-container > a:hover .logo {
    opacity: 0.8;
}

.nav-container > a:focus {
    outline: 2px solid var(--info);
    outline-offset: 4px;
    border-radius: 4px;
}

.nav-menu {
    display: flex;
    gap: 32px;
    list-style: none;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-menu a:hover {
    color: var(--text-primary-dark);
}

.nav-menu a:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Search Container */
.nav-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 200px;
    padding: 6px 32px 6px 12px;
    border: 1px solid var(--border-dark);
    border-radius: 20px;
    background: var(--bg-dark-elevated);
    color: var(--text-primary-dark);
    font-size: 14px;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    width: 250px;
    background: var(--bg-dark-card);
}

.search-input:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.search-btn {
    position: absolute;
    right: 8px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    transition: color 0.2s ease;
}

.search-btn:hover {
    color: var(--primary);
}

.search-btn:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Standardized Button System */
.btn-primary,
.nav-cta {
    background: var(--primary);
    color: white;
    padding: 8px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.nav-cta:hover,
.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
    transform: translateY(-2px);
}

.nav-cta:focus-visible,
.btn-primary:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}

/* Secondary Button */
.btn-secondary {
    background: transparent;
    color: var(--primary);
    padding: 8px 24px;
    border: 2px solid var(--primary);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s ease;
    display: inline-block;
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.btn-secondary:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}

/* Tertiary Button */
.btn-tertiary {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
    border: none;
    text-decoration: underline;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-tertiary:hover {
    color: var(--primary);
}

.btn-tertiary:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary-dark);
    transition: all 0.3s ease;
}

/* Hide mobile-only items by default */
.mobile-search-item,
.mobile-cta-item {
    display: none;
}

/* Footer */
footer {
    background: var(--bg-dark);
    padding: 48px 32px 32px;
    border-top: 1px solid var(--border-dark);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary-dark);
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.footer-column h4 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary-dark);
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-column a:focus {
    outline: 2px solid var(--info);
    outline-offset: 2px;
    border-radius: 4px;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 32px;
    border-top: 1px solid var(--border-dark);
    text-align: center;
    color: var(--text-secondary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-container {
        padding: 16px 20px;
    }
    
    .nav-actions {
        display: none;
    }
    
    .search-container {
        width: 100%;
        margin-bottom: 16px;
    }
    
    .search-input {
        width: 100%;
    }

    .nav-menu {
        position: fixed;
        /* Calculate top position with safe area */
        top: calc(65px + env(safe-area-inset-top));
        top: calc(65px + constant(safe-area-inset-top)); /* iOS 11.0-11.2 */
        left: 0;
        right: 0;
        background: rgba(18, 18, 18, 0.98);
        flex-direction: column;
        padding: 24px 32px;
        gap: 12px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        border-bottom: 1px solid var(--border-dark);
        backdrop-filter: blur(20px);
    }
    
    .nav-menu li {
        padding: 4px 0;
    }
    
    .nav-menu a {
        font-size: 18px;
        font-weight: 500;
        display: block;
        padding: 8px 0;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-cta {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }
    
    /* Show mobile search and CTA only in mobile menu when active */
    .nav-menu .mobile-search-item {
        display: block !important;
        width: 100%;
        padding: 0 !important;
        margin-bottom: 16px;
    }
    
    .mobile-search-container {
        position: relative;
        display: flex;
        width: 100%;
    }
    
    .mobile-search-input {
        flex: 1;
        padding: 10px 40px 10px 16px;
        border: 1px solid var(--border-dark);
        border-radius: 8px;
        background: var(--bg-dark-elevated);
        color: var(--text-primary-dark);
        font-size: 16px;
        -webkit-appearance: none;
        appearance: none;
    }

    .mobile-search-input::placeholder {
        color: var(--text-secondary);
    }

    .mobile-search-input:focus {
        outline: none;
        border-color: var(--primary);
        background: var(--bg-dark-card);
    }
    
    .mobile-search-btn {
        position: absolute;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        background: none;
        border: none;
        color: var(--text-secondary);
        padding: 8px;
        cursor: pointer;
    }
    
    .nav-menu .mobile-cta-item {
        display: block !important;
        margin-top: 16px;
        padding-top: 16px;
        border-top: 1px solid var(--border-dark);
    }
    
    .mobile-nav-cta {
        background: var(--primary) !important;
        color: white !important;
        padding: 10px 24px !important;
        border-radius: 8px !important;
        text-align: center !important;
        display: block !important;
        font-weight: 600 !important;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        padding-top: 24px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 16px;
    }

    footer {
        padding: 32px 16px 24px;
    }
}

/* CSS Grid Fallback */
@supports not (display: grid) {
    .footer-content {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }
    
    .footer-brand {
        flex: 1 1 100%;
        margin-bottom: 32px;
    }
    
    .footer-column {
        flex: 1 1 30%;
        min-width: 150px;
        margin-bottom: 32px;
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.4);
}

.back-to-top:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* Scroll Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Card Hover Effects */
.card-hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    nav {
        border-bottom: 2px solid var(--border-dark);
    }
    
    .nav-cta {
        border: 2px solid transparent;
    }
    
    .nav-cta:hover {
        border-color: var(--primary-dark);
    }
    
    footer {
        border-top: 2px solid var(--border-dark);
    }
}