/**
 * Public-facing CSS for the Charleston Airport Flights plugin.
 *
 * Based on the original v1.0.0 CSS with surgical additions for:
 * - New HTML structure (contact info outside <button> for WCAG SC 4.1.2)
 * - WCAG 2.1 AA focus indicator fixes (SC 2.4.7)
 * - Fieldset and live-region support
 * - Color contrast fix (SC 1.4.3)
 * - High contrast mode and reduced motion preferences
 *
 * @since      1.1.0
 * @package    CHS_Flights
 */

/* Root variables for consistency */
:root {
    --font-family-primary: 'Brandon Grotesque', sans-serif;
    --color-dark-navy: #1B365D;
    --color-royal-blue: #0088FF;
    --color-white: #ffffff;
    --color-soft-black: #0f0f10;
    --color-light-grey: #f2f2f2;
    --color-very-light-grey: #f8f8f8;
    --color-link-blue: #0066cc; /* Updated from #0076df for 4.9:1 contrast ratio (WCAG AA) */
    --color-focus: #0066cc;
    --border-color: #0f0f10;
    --text-color-primary: var(--color-soft-black);
    --background-color-light: var(--color-very-light-grey);
    --background-color-white: var(--color-white);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --border-radius: 0.25rem;
    --box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

/* Base Styles */
.chs-airlines-container,
.chs-nonstop-wrapper,
.chs-nonstop-container,
.chs-destinations-grid-container,
.chs-destinations-list-container {
    font-family: var(--font-family-primary);
    color: var(--text-color-primary);
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography - Override any theme styles */
body .chs-airline-name,
.chs-airlines-container .chs-airline-name {
    font-family: var(--font-family-primary) !important;
    font-weight: 500 !important;
    font-size: 1.25rem !important;
    line-height: 1.5rem !important;
    color: var(--text-color-primary) !important;
    margin: 0 !important;
    padding: 0 !important;
    text-transform: none !important;
    letter-spacing: normal !important;
}

.chs-state-name {
    font-family: var(--font-family-primary) !important;
    font-weight: 500 !important;
    font-size: 1.25rem !important;
    line-height: 1.5rem !important;
    color: var(--text-color-primary) !important;
    margin: 0 !important;
    padding: 0 !important;
}

.chs-destination-name {
    font-family: var(--font-family-primary) !important;
    font-weight: 500 !important;
    font-size: 1.125rem !important;
    line-height: 1.6875rem !important;
    color: var(--text-color-primary) !important;
    margin: 0 !important;
    padding: 0 !important;
}

.chs-destination-title,
.chs-destination-location,
.chs-airlines-info,
.chs-schedules-info,
.chs-detail-item,
.chs-airline-meta,
.chs-empty-message,
.chs-airlines-list {
    font-family: var(--font-family-primary) !important;
    font-weight: 400 !important;
    font-size: 1.125rem !important;
    line-height: 1.6875rem !important;
    color: var(--text-color-primary) !important;
    margin: 0 !important;
    padding: 0 !important;
}

.chs-destination-airport,
.chs-airport-info {
    font-family: var(--font-family-primary) !important;
    font-weight: 400 !important;
    font-size: 1rem !important;
    line-height: 1.5rem !important;
    color: var(--text-color-primary) !important;
    margin: 0 !important;
    padding: 0 !important;
}

.chs-airline-meta-label,
.chs-airlines-label,
.chs-schedules-label,
.chs-detail-label {
    font-weight: 500 !important;
    margin-right: 5px !important;
}

.chs-airport-code {
    font-weight: 400 !important;
}

/* Link styles */
.chs-link {
    font-family: var(--font-family-primary) !important;
    font-weight: 400 !important;
    font-size: 1.125rem !important;
    line-height: 1.6875rem !important;
    color: var(--color-soft-black) !important;
    text-decoration: underline !important;
    transition: color 0.2s ease !important;
    display: inline-block !important;
}

.chs-link:hover,
.chs-link:active {
    color: var(--color-link-blue) !important;
}

/* [WCAG FIX] Focus always visible for keyboard, suppress for mouse */
.chs-link:focus {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
    color: var(--color-link-blue) !important;
}

.chs-link:focus:not(:focus-visible) {
    outline: none !important;
}

.chs-link:focus-visible {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
}

.chs-link.chs-website-link {
    font-weight: 500 !important;
}

/* =========================================================================
   Accordion Styles
   ========================================================================= */

.chs-accordion-item {
    border: none !important;
    margin-bottom: var(--spacing-sm) !important;
    padding: 0 !important;
    background-color: var(--background-color-white) !important;
    overflow: visible !important;
    border-radius: var(--border-radius) !important;
    transition: background-color 0.2s ease, box-shadow 0.2s ease !important;
}

/* Expanded state — subtle background + shadow so you can tell which row is open */
.chs-accordion-item:has(.chs-accordion-trigger[aria-expanded="true"]) {
    background-color: var(--color-light-grey) !important;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06) !important;
}

/*
 * [STRUCTURAL CHANGE] .chs-accordion-header is now the visual "row".
 * It contains: h2 > button (logo + name + icon), then .chs-airline-meta
 * as a sibling. The header handles hover/expanded background so that
 * the meta area is visually included in the hover zone.
 */
.chs-accordion-header {
    cursor: pointer !important;
    transition: background-color 0.2s ease !important;
}

.chs-accordion-header:hover {
    background-color: var(--color-light-grey) !important;
}

/* Reset the h2 wrapper — prevent theme overrides from affecting children */
.chs-accordion-heading {
    margin: 0 !important;
    padding: 0 !important;
    font-size: unset !important;
    font-weight: unset !important;
    line-height: unset !important;
    border: none !important;
    background: none !important;
}

.chs-accordion-trigger {
    display: flex !important;
    width: 100% !important;
    padding: var(--spacing-md) !important;
    background: none !important;
    border: none !important;
    cursor: pointer !important;
    text-align: left !important;
    align-items: center !important;
    justify-content: space-between !important;
    transition: background-color 0.2s ease !important;
    font-family: inherit !important;
    font-size: inherit !important;
}

/* Remove bottom padding when meta follows the button */
.chs-accordion-header:has(.chs-airline-meta) .chs-accordion-trigger {
    padding-bottom: 0 !important;
}

/* Don't put hover on trigger itself — let the parent .chs-accordion-header handle it */

.chs-accordion-trigger[aria-expanded="true"] {
    /* Handled by parent .chs-accordion-header instead */
}

.chs-accordion-header:has(.chs-accordion-trigger[aria-expanded="true"]) {
    background-color: transparent !important;
}

/* [WCAG FIX] Focus ring shows around the entire header row when the
   accordion BUTTON has keyboard focus. Uses :has() so link focus in the
   meta area doesn't trigger the header outline. */
.chs-accordion-trigger:focus {
    outline: none !important;
}

.chs-accordion-trigger:focus-visible {
    outline: none !important;
}

.chs-accordion-header:has(.chs-accordion-trigger:focus-visible) {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
}

/* Nonstop flights accordions — focus handled by the shared
   .chs-accordion-header:has() rule above, no extra rules needed */

.chs-accordion-trigger-content {
    display: flex !important;
    align-items: center !important;
    flex-grow: 1 !important;
}

.chs-airline-logo-wrapper {
    margin-right: var(--spacing-lg) !important;
    width: 80px !important;
    flex-shrink: 0 !important;
    display: flex !important;
    align-items: center !important;
}

.chs-airline-logo {
    width: 100% !important;
    height: auto !important;
    display: block !important;
}

.chs-airline-info {
    flex-grow: 1 !important;
    display: flex !important;
    flex-direction: column !important;
}

/*
 * [STRUCTURAL CHANGE] .chs-airline-meta is now OUTSIDE the button.
 * It's a sibling of the h2, sitting inside .chs-accordion-header.
 * Left padding matches: button-padding + logo-width + logo-margin-right
 * = 1.5rem + 80px + 2rem
 */
.chs-airline-meta {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    margin-top: 0 !important;
    padding: 0 0 var(--spacing-md) calc(var(--spacing-md) + 80px + var(--spacing-lg)) !important;
    position: relative !important;
    z-index: 1 !important;
}

.chs-airline-phone {
    margin-right: var(--spacing-md) !important;
    margin-bottom: var(--spacing-xs) !important;
}

.chs-airline-website {
    margin-bottom: var(--spacing-xs) !important;
}

/* Accordion icon — circular +/- */
.chs-accordion-icon {
    position: relative !important;
    width: 28px !important;
    height: 28px !important;
    margin-left: var(--spacing-md) !important;
    flex-shrink: 0 !important;
    border-radius: 50% !important;
    border: 1px solid var(--border-color) !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background-color: var(--color-white) !important;
}

.chs-accordion-icon:before,
.chs-accordion-icon:after {
    content: "" !important;
    position: absolute !important;
    background-color: var(--color-soft-black) !important;
    transition: transform 0.3s ease !important;
    top: 50% !important;
    left: 50% !important;
}

.chs-accordion-icon:before {
    width: 14px !important;
    height: 2px !important;
    margin-top: -1px !important;
    margin-left: -7px !important;
}

.chs-accordion-icon:after {
    width: 2px !important;
    height: 14px !important;
    margin-top: -7px !important;
    margin-left: -1px !important;
}

.chs-accordion-trigger[aria-expanded="true"] .chs-accordion-icon:after {
    transform: rotate(90deg) !important;
}

/* Accordion panel */
.chs-accordion-panel {
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) + 80px) !important;
    border-top: none !important;
}

/* States accordion in nonstop flights — spacing instead of borders */
.chs-destinations-accordion .chs-accordion-item {
    margin-bottom: var(--spacing-sm) !important;
    border: none !important;
}

.chs-destinations-accordion .chs-accordion-trigger {
    padding: var(--spacing-md) !important;
}

.chs-destinations-accordion .chs-accordion-trigger:hover {
    background-color: var(--color-light-grey) !important;
}

.chs-destinations-accordion .chs-accordion-trigger[aria-expanded="true"] {
    background-color: transparent !important;
}

.chs-destinations-accordion .chs-accordion-panel {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-md) !important;
    border-top: none !important;
}

/* =========================================================================
   Schedule Groups
   ========================================================================= */

.chs-schedule-group {
    margin-top: var(--spacing-md) !important;
}

.chs-schedule-group:first-child {
    margin-top: 0 !important;
}

.chs-schedule-heading {
    font-family: var(--font-family-primary) !important;
    font-weight: 500 !important;
    font-size: 1.25rem !important;
    margin-bottom: var(--spacing-sm) !important;
    color: var(--text-color-primary) !important;
    border-bottom: 1px solid #cccccc !important;
    padding-bottom: var(--spacing-xs) !important;
    display: flex !important;
    align-items: center !important;
}

.chs-schedule-heading::before {
    content: '' !important;
    width: 32px !important;
    height: 32px !important;
    margin-right: var(--spacing-sm) !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%230f0f10'%3E%3Cpath d='M17.8 19.2 16 11l3.5-3.5C21 6 21.5 4 21 3c-1-.5-3 0-4.5 1.5L13 8 4.8 6.2c-.5-.1-.9.1-1.1.5l-.3.5c-.2.5-.1 1 .3 1.3L9 12l-2 3H4l-1 1 3 2 2 3 1-1v-3l3-2 3.5 5.3c.3.4.8.5 1.3.3l.5-.2c.4-.3.6-.7.5-1.2z'/%3E%3C/svg%3E") !important;
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    flex-shrink: 0 !important;
}

/* =========================================================================
   Destinations List
   ========================================================================= */

.chs-destinations-list {
    list-style: none !important;
    padding: 0 !important;
    margin: 0 !important;
    display: grid !important;
    grid-template-columns: repeat(3, 1fr) !important;
    gap: var(--spacing-sm) !important;
}

.chs-destination-item {
    padding: var(--spacing-xs) 0 !important;
}

.chs-destination-item:last-child {
    border-bottom: none !important;
}

.chs-destination-main {
    display: flex !important;
    flex-direction: column !important;
}

.chs-destination-title {
    font-weight: 500 !important;
    margin-right: var(--spacing-sm) !important;
    color: var(--text-color-primary) !important;
}

.chs-destination-airport {
    color: var(--text-color-primary) !important;
}

.chs-destination-schedule {
    color: var(--text-color-primary) !important;
    font-style: italic !important;
}

/* =========================================================================
   Route Details
   ========================================================================= */

.chs-details-toggle {
    background: none !important;
    border: none !important;
    padding: 0 !important;
    font-family: var(--font-family-primary) !important;
    font-weight: 500 !important;
    font-size: 1.125rem !important;
    color: var(--color-soft-black) !important;
    text-decoration: underline !important;
    cursor: pointer !important;
    margin-top: var(--spacing-xs) !important;
    align-self: flex-start !important;
    transition: color 0.2s ease !important;
}

.chs-details-toggle:hover,
.chs-details-toggle:active {
    color: var(--color-link-blue) !important;
}

/* [WCAG FIX] Focus always visible for keyboard, suppress for mouse */
.chs-details-toggle:focus {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
    color: var(--color-link-blue) !important;
}

.chs-details-toggle:focus:not(:focus-visible) {
    outline: none !important;
}

.chs-details-toggle:focus-visible {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
}

.chs-details-toggle-icon {
    display: inline-block !important;
    width: 12px !important;
    height: 12px !important;
    margin-left: 5px !important;
    position: relative !important;
}

.chs-details-toggle-icon:before,
.chs-details-toggle-icon:after {
    content: "" !important;
    position: absolute !important;
    background-color: currentColor !important;
    transition: transform 0.3s ease !important;
}

.chs-details-toggle-icon:before {
    top: 5px !important;
    left: 0 !important;
    width: 12px !important;
    height: 2px !important;
}

.chs-details-toggle-icon:after {
    top: 0 !important;
    left: 5px !important;
    width: 2px !important;
    height: 12px !important;
}

.chs-details-toggle[aria-expanded="true"] .chs-details-toggle-icon:after {
    transform: rotate(90deg) !important;
}

.chs-route-details {
    background-color: var(--background-color-light) !important;
    padding: var(--spacing-sm) !important;
    margin-top: var(--spacing-xs) !important;
    border-radius: var(--border-radius) !important;
}

.chs-detail-item {
    margin-bottom: var(--spacing-xs) !important;
}

.chs-detail-item:last-child {
    margin-bottom: 0 !important;
}

.chs-detail-label {
    font-weight: 500 !important;
    margin-right: var(--spacing-xs) !important;
}

/* =========================================================================
   Filter Controls
   ========================================================================= */

.chs-filter-controls {
    margin-bottom: var(--spacing-md) !important;
}

/* [WCAG FIX] Fieldset reset for radio group */
.chs-radio-fieldset {
    border: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

.chs-radio-group {
    display: flex !important;
    align-items: center !important;
}

.chs-radio-label {
    display: inline-flex !important;
    align-items: center !important;
    margin-right: var(--spacing-md) !important;
    cursor: pointer !important;
}

.chs-radio-input {
    margin-right: var(--spacing-xs) !important;
}

/* [WCAG FIX] Focus always visible for keyboard */
.chs-radio-input:focus {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
}

.chs-radio-input:focus:not(:focus-visible) {
    outline: none !important;
}

.chs-radio-input:focus-visible {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 2px !important;
}

.chs-radio-text {
    font-family: var(--font-family-primary) !important;
    font-weight: 500 !important;
    font-size: 1.125rem !important;
}

/* =========================================================================
   Destination Grid
   ========================================================================= */

.chs-destination-grid {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: var(--spacing-md) !important;
    padding: 0 !important;
    margin: 0 !important;
}

.chs-destination-card {
    display: flex !important;
    flex-direction: row !important;
    border: none !important;
    border-radius: 0.5rem !important;
    overflow: hidden !important;
    background-color: var(--background-color-white) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important;
    height: auto !important;
    min-height: 160px !important;
}

.chs-destination-image-wrapper,
.chs-destination-image-link {
    display: block !important;
    width: 40% !important;
    min-width: 40% !important;
    overflow: hidden !important;
    position: relative !important;
    height: auto !important;
}

.chs-destination-image {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    transition: transform 0.3s ease !important;
    image-rendering: -webkit-optimize-contrast !important;
    image-rendering: crisp-edges !important;
}

.chs-destination-image-link:hover .chs-destination-image {
    transform: scale(1.05) !important;
}

/* [WCAG FIX] Focus always visible for keyboard */
.chs-destination-image-link:focus {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 0 !important;
}

.chs-destination-image-link:focus:not(:focus-visible) {
    outline: none !important;
}

.chs-destination-image-link:focus-visible {
    outline: 2px solid var(--color-focus) !important;
    outline-offset: 0 !important;
}

.chs-destination-info {
    width: 60% !important;
    padding: var(--spacing-sm) !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
}

.chs-airport-info,
.chs-destination-location {
    margin-bottom: var(--spacing-xs) !important;
}

.chs-airlines-info,
.chs-schedules-info {
    margin-top: var(--spacing-xs) !important;
}

.chs-airlines-list {
    margin-top: var(--spacing-xs) !important;
    color: var(--text-color-primary) !important;
}

/* =========================================================================
   Accessibility
   ========================================================================= */

.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

/* [WCAG FIX] High contrast mode */
@media (forced-colors: active) {
    .chs-accordion-icon {
        border-color: ButtonText !important;
    }

    .chs-accordion-icon:before,
    .chs-accordion-icon:after {
        background-color: ButtonText !important;
    }

    .chs-accordion-trigger:focus,
    .chs-details-toggle:focus,
    .chs-link:focus,
    .chs-radio-input:focus {
        outline-color: Highlight !important;
    }
}

/* [WCAG FIX] Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .chs-accordion-icon:before,
    .chs-accordion-icon:after,
    .chs-details-toggle-icon:before,
    .chs-details-toggle-icon:after,
    .chs-destination-image,
    .chs-link,
    .chs-accordion-trigger,
    .chs-accordion-header,
    .chs-details-toggle {
        transition: none !important;
    }
}

/* =========================================================================
   Responsive — Mobile
   ========================================================================= */

@media screen and (max-width: 767px) {
    .chs-destinations-list {
        grid-template-columns: 1fr !important;
    }

    .chs-destination-grid {
        grid-template-columns: 1fr !important;
    }

    .chs-accordion-trigger-content {
        flex-direction: column !important;
        align-items: flex-start !important;
    }

    .chs-airline-logo-wrapper {
        margin-right: 0 !important;
        margin-bottom: var(--spacing-xs) !important;
    }

    .chs-accordion-panel {
        padding: var(--spacing-sm) !important;
    }

    .chs-airline-meta {
        flex-direction: column !important;
        padding-left: var(--spacing-md) !important;
    }

    .chs-airline-phone {
        margin-right: 0 !important;
    }

    .chs-destination-card {
        flex-direction: column !important;
        min-height: auto !important;
    }

    .chs-destination-image-wrapper,
    .chs-destination-image-link {
        width: 100% !important;
        min-width: 100% !important;
        height: 0 !important;
        padding-top: 56.25% !important;
        position: relative !important;
    }

    .chs-destination-info {
        width: 100% !important;
    }

    /* [WCAG FIX] 44x44 minimum touch targets */
    .chs-accordion-trigger {
        min-height: 44px !important;
        padding: var(--spacing-md) !important;
    }

    .chs-accordion-header:has(.chs-airline-meta) .chs-accordion-trigger {
        padding-bottom: 0 !important;
    }

    .chs-details-toggle {
        min-height: 44px !important;
        display: inline-flex !important;
        align-items: center !important;
    }

    .chs-radio-label {
        min-height: 44px !important;
        padding: 8px 0 !important;
    }
}

/* =========================================================================
   Responsive — Tablet
   ========================================================================= */

@media screen and (min-width: 768px) and (max-width: 1023px) {
    .chs-destinations-list {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .chs-destination-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .chs-accordion-trigger-content {
        align-items: center !important;
    }

    .chs-airline-info {
        flex-direction: column !important;
    }

    .chs-destination-card {
        min-height: 140px !important;
    }
}

/* =========================================================================
   Responsive — Desktop
   ========================================================================= */

@media screen and (min-width: 1024px) {
    .chs-destinations-list {
        grid-template-columns: repeat(3, 1fr) !important;
    }

    .chs-destination-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .chs-accordion-trigger-content {
        align-items: center !important;
    }

    .chs-airline-logo-wrapper {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .chs-destination-card {
        min-height: 160px !important;
    }
}

/* =========================================================================
   Print
   ========================================================================= */

@media print {
    .chs-accordion-panel[hidden] {
        display: block !important;
        visibility: visible !important;
        height: auto !important;
    }

    .chs-accordion-panel {
        display: block !important;
        height: auto !important;
    }

    .chs-accordion-icon {
        display: none !important;
    }

    .chs-nonstop-panel[hidden] {
        display: block !important;
        visibility: visible !important;
    }

    .chs-destination-image {
        print-color-adjust: exact !important;
    }
}