/* CSS Variables */
:root {
    --color-bg: #87d2d3;
    --color-primary-dark: #363636;
    --color-accent: #F66095;
    --color-white: #ffffff;
    --radius-sm: 4px;
    --focus-ring: 2px solid var(--color-primary-dark);
    --transition-fast: 0.2s ease;
}

/* Performance: Use system font stack as fallback while custom font loads */
body {
    padding-top: 56px;
    background-color: var(--color-bg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* Reduce paint complexity */
* {
    -webkit-tap-highlight-color: transparent;
}

/* Remove focus outlines on mouse clicks (keep them for keyboard navigation) */
*:focus:not(:focus-visible) {
    outline: none;
}

/* Optimize rendering */
img {
    max-width: 100%;
    height: auto;
}

/* Skip link for keyboard accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary-dark);
    color: var(--color-white);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus-visible {
    top: 0;
    outline: 3px solid var(--color-accent);
    outline-offset: 2px;
}

nav {
    background-color: var(--color-primary-dark);
}

.navbar-icon {
    border: 1px solid #ffffff;
    border-radius: 50%;
}

.navbar-brand,
.navbar-brand:hover {
    color: var(--color-white);
    text-decoration: none;
    font-family: "Grandstander", cursive;
    font-optical-sizing: auto;
    font-weight: 800;
    font-style: normal;
}

.navbar-toggler {
    border-color: #ffffff;
}

.navbar-toggler:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 32 32' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='rgba(255, 255, 255, 1.0)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 8h24M4 16h24M4 24h24'/%3E%3C/svg%3E");
}

#navbar-collapse-section {
    color: var(--color-white);
}

.nav-profile-link {
    color: var(--color-white);
    opacity: 0.9;
    transition: opacity var(--transition-fast);
}

.nav-profile-link:hover {
    opacity: 1;
}

.nav-profile-link-primary {
    opacity: 1;
    font-weight: 500;
}

.nav-profile-link:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
    border-radius: 2px;
}

.nav-about-heading,
.nav-contact-heading {
    color: var(--color-white);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

/* Collapsible About and Contact button styling */
button[data-bs-toggle="collapse"][data-bs-target="#about-collapse"],
button[data-bs-toggle="collapse"][data-bs-target="#contact-collapse"] {
    color: var(--color-white) !important;
    transition: opacity var(--transition-fast);
}

button[data-bs-toggle="collapse"][data-bs-target="#about-collapse"]:hover,
button[data-bs-toggle="collapse"][data-bs-target="#contact-collapse"]:hover {
    opacity: 0.85;
}

button[data-bs-toggle="collapse"][data-bs-target="#about-collapse"]:focus-visible,
button[data-bs-toggle="collapse"][data-bs-target="#contact-collapse"]:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Rotate chevrons when expanded */
button[data-bs-toggle="collapse"][data-bs-target="#about-collapse"][aria-expanded="true"] .about-chevron,
button[data-bs-toggle="collapse"][data-bs-target="#contact-collapse"][aria-expanded="true"] .contact-chevron {
    transform: rotate(180deg);
}

button[data-bs-toggle="collapse"][data-bs-target="#about-collapse"] .about-chevron,
button[data-bs-toggle="collapse"][data-bs-target="#contact-collapse"] .contact-chevron {
    transition: transform var(--transition-fast);
}

/* Search bar container - unified styling */
.input-group#search-input-group {
    border-radius: 4px;
    border: 1px solid #ced4da;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    overflow: hidden; /* Ensure border radius is applied correctly */
}

/* When input is focused, highlight the entire group */
#search-input-group.input-focused,
#search-input-group:has(#search-bar:focus),
#search-input-group:has(#search-bar:focus-visible) {
    border-color: var(--color-primary-dark);
    box-shadow: 0 0 0 2px rgba(54, 54, 54, 0.1);
}

/* Input styling - no individual border/outline */
#search-bar {
    border: none;
    border-radius: 4px;
}

.form-control#search-bar:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

/* When clear button is visible, adjust input border radius */
#search-bar.clear-visible {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

#clear-button {
    display: none;
    background-color: white;
    border: none;
    border-left: 1px solid #ced4da;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}

#clear-button:hover, #clear-button:active {
    color: currentColor;
    background-color: #f8f9fa;
}

#clear-button:focus-visible {
    outline: 2px solid var(--color-primary-dark);
    outline-offset: -2px;
}

.ingredients-dropdown-list {
    max-height: 200px;
    overflow-y: auto;
    padding-bottom: 0px;
}

/* Better focus indicators for checkboxes */
.dropdown-filter-checkbox:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
}

.dropdown-filter-item label {
    cursor: pointer;
    padding-left: 8px;
    user-select: none;
}

.clear-filter-button-and-divider {
    display: none;
    position: sticky;
    bottom: 0;
    background: white;
    z-index: 1;
    text-align: center;
    padding-bottom: 8px;
}

#results .drink {
    opacity: 1;
    animation-name: fadeInOpacity;
    animation-iteration-count: 1;
    animation-timing-function: ease-in;
    animation-duration: 0.5s;
}

@keyframes fadeInOpacity {
    0% {
        opacity: 0;
    }

    100% {
        opacity: 1;
    }
}

.card {
    border-radius: 0%;
    border: 0;
}

.card-img-top {
    border-radius: 0%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    /* Optimize image rendering */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.card {
    opacity: 1;
    transition: opacity 0.3s;
}

#drinks .card:hover {
    opacity: 0.9;
}

/* Focus indicator for card links */
.card a:focus-visible {
    outline: 3px solid var(--color-primary-dark);
    outline-offset: 3px;
}

.card a:focus-visible img {
    opacity: 0.9;
}

.no-match-text-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 20px;
    min-height: 40vh;
}

.no-match-content {
    text-align: center;
    max-width: 500px;
    opacity: 0;
    animation-name: fadeInOpacity;
    animation-iteration-count: 1;
    animation-timing-function: ease-in;
    animation-duration: 0.6s;
    animation-fill-mode: forwards;
}

.no-match-icon {
    color: var(--color-primary-dark);
    opacity: 0.6;
    margin-bottom: 24px;
    display: block;
    margin-left: auto;
    margin-right: auto;
    overflow: visible;
}

.no-match-heading {
    color: var(--color-primary-dark);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
}

.no-match-suggestion {
    color: var(--color-primary-dark);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 0;
    opacity: 0.85;
}

.no-match-accent {
    color: var(--color-accent);
    font-weight: 500;
}

footer {
    background-color: var(--color-primary-dark);
}

.footer-icon {
    border: 1px solid #ffffff;
    border-radius: 50%;
}

.footer-text {
    color: var(--color-white);
}

.nav-link,
.nav-link:hover {
    color: var(--color-primary-dark);
    text-decoration: none;
}

.nav-link:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
}

.svg-icon-link {
    text-decoration: none;
    padding-right: 10px;
}

.svg-icon-link:hover .svg-icon {
    transform: scale(1.2);
}

.svg-icon-link:focus-visible {
    outline: 2px solid currentColor;
    outline-offset: 2px;
    border-radius: 4px;
}

.svg-icon-link-dark {
    color: var(--color-primary-dark);
}

.svg-icon-link-light {
    color: var(--color-white);
}

.svg-icon {
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.similar-drinks-heading {
    color: var(--color-primary-dark);
    font-size: 20px;
}

.drink-name-highlight {
    color: var(--color-accent);
}

#filter-button {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

#filter-button:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
}

#sort-button {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
}

#sort-button:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
}

.hidden {
    display: none;
}

/* Visually hidden class for screen readers */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Ensure dropdown menu items have proper focus */
.dropdown-item:focus-visible {
    outline: var(--focus-ring);
    outline-offset: -2px;
}

/* Improve carousel button focus */
.carousel-control-prev:focus-visible,
.carousel-control-next:focus-visible {
    outline: 3px solid var(--color-primary-dark);
    outline-offset: 2px;
}

/* Custom Scrollbar (non-intrusive) */
/* Applies where overflow appears, e.g., ingredients list */
.ingredients-dropdown-list::-webkit-scrollbar {
    width: 10px;
}

.ingredients-dropdown-list::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
}

.ingredients-dropdown-list::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
}

.ingredients-dropdown-list::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.3);
}

/* Print styles */
@media print {
    nav, footer, .navbar, .nav, .dropdown-menu { display: none !important; }
    body { background: #ffffff !important; }
    .card { box-shadow: none !important; border: 0 !important; }
    img { max-width: 100% !important; height: auto !important; }
}

/* Performance optimizations */
@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;
    }
}

/* GPU acceleration for animations */
.card,
.svg-icon,
#results .drink {
    will-change: auto;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Optimize font rendering */
body,
.navbar-brand {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Contain layout shifts */
.card {
    contain: layout;
}

.card-img-top {
    contain: paint;
}

/* UX: Global HTMX indicator */
.htmx-request .htmx-indicator { display: inline-block; }
.htmx-indicator {
    display: none;
    position: fixed;
    top: 70px;
    right: 20px;
    z-index: 1000;
    background: rgba(54, 54, 54, 0.95);
    color: var(--color-white);
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    font-size: 14px;
}

/* UX: Loading state for results (does not change grid) */
#results.htmx-swapping {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

#results.htmx-swapping::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid var(--color-primary-dark);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* UX: Infinite scroll loading indicator */
#infinite-scroll-container.htmx-request::after {
    content: '';
    display: block;
    width: 30px;
    height: 30px;
    margin: 20px auto;
    border: 3px solid var(--color-primary-dark);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* UX: Image error states */
.card-img-top {
    background: linear-gradient(135deg, #e0e0e0 25%, #f5f5f5 25%, #f5f5f5 50%, #e0e0e0 50%, #e0e0e0 75%, #f5f5f5 75%, #f5f5f5);
    background-size: 20px 20px;
}

.card-img-top.error {
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
    text-align: center;
    padding: 20px;
}

/* UX: Button micro-feedback */
.btn { transition: transform var(--transition-fast); }
.btn:active { transform: scale(0.98); }