/**
 * Lista Recurring Events - Add to Calendar Button
 *
 * Custom dropdown button for adding events to calendars.
 * No external dependencies.
 *
 * @package Listapage\RecurringEvents
 * @since 1.5.0
 */

/* ============================================
   CSS VARIABLES
   ============================================ */

.lre-atc-wrapper {
    --lre-atc-bg: #ffffff;
    --lre-atc-text: #374151;
    --lre-atc-border: #d1d5db;
    --lre-atc-accent: var(--lre-primary-color, #3788d8);
    --lre-atc-accent-hover: var(--lre-primary-hover, #2563eb);
    --lre-atc-radius: 8px;
    --lre-atc-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --lre-atc-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --lre-atc-transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    
    position: relative;
    display: inline-block;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
}

/* ============================================
   MAIN BUTTON
   ============================================ */

.lre-atc-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--lre-atc-bg);
    color: var(--lre-atc-text);
    border: 1px solid var(--lre-atc-border);
    border-radius: var(--lre-atc-radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--lre-atc-transition);
    box-shadow: var(--lre-atc-shadow);
    white-space: nowrap;
}

.lre-atc-button:hover {
    background: var(--lre-atc-accent);
    color: #ffffff;
    border-color: var(--lre-atc-accent);
    box-shadow: var(--lre-atc-shadow-lg);
}

.lre-atc-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(55, 136, 216, 0.3);
}

.lre-atc-button:active {
    transform: scale(0.98);
}

/* Button icon */
.lre-atc-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.lre-atc-icon svg {
    width: 18px;
    height: 18px;
}

/* Button label */
.lre-atc-label {
    flex-grow: 1;
}

/* Chevron icon */
.lre-atc-chevron {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--lre-atc-transition);
}

.lre-atc-chevron svg {
    width: 14px;
    height: 14px;
}

/* Rotate chevron when open */
.lre-atc-wrapper.is-open .lre-atc-chevron {
    transform: rotate(180deg);
}

/* ============================================
   DROPDOWN MENU
   ============================================ */

.lre-atc-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 200px;
    background: var(--lre-atc-bg);
    border: 1px solid var(--lre-atc-border);
    border-radius: var(--lre-atc-radius);
    box-shadow: var(--lre-atc-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--lre-atc-transition);
    z-index: 1000;
    overflow: hidden;
}

.lre-atc-wrapper.is-open .lre-atc-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Dropdown positioning variant - right aligned */
.lre-atc-wrapper.align-right .lre-atc-dropdown {
    left: auto;
    right: 0;
}

/* Dropdown positioning variant - top */
.lre-atc-wrapper.position-top .lre-atc-dropdown {
    top: auto;
    bottom: calc(100% + 4px);
    transform: translateY(8px);
}

.lre-atc-wrapper.position-top.is-open .lre-atc-dropdown {
    transform: translateY(0);
}

/* ============================================
   DROPDOWN OPTIONS
   ============================================ */

.lre-atc-option {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    color: var(--lre-atc-text);
    text-decoration: none;
    border: none;
    border-bottom: 1px solid #f3f4f6;
    font-size: 14px;
    font-weight: 400;
    text-align: left;
    cursor: pointer;
    transition: background var(--lre-atc-transition);
}

.lre-atc-option:last-child {
    border-bottom: none;
}

.lre-atc-option:hover {
    background: #f9fafb;
    color: var(--lre-atc-text);
    text-decoration: none;
}

.lre-atc-option:focus {
    outline: none;
    background: #f3f4f6;
}

/* Option icon */
.lre-atc-option-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.lre-atc-option-icon svg {
    width: 16px;
    height: 16px;
}

/* ============================================
   TREEVIEW (RECURRING EVENTS SERIES)
   ============================================ */

.lre-atc-treeview {
    position: relative;
}

.lre-atc-treeview-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: var(--lre-atc-text, #1e293b);
    font-size: 0.9em;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease;
    text-align: left;
}

.lre-atc-treeview-toggle:hover {
    background: var(--lre-atc-hover, rgba(0, 0, 0, 0.04));
}

.lre-atc-treeview-toggle .lre-atc-option-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.lre-atc-treeview-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.lre-atc-treeview-arrow .lre-treeview-arrow-icon {
    width: 12px;
    height: 12px;
}

.lre-atc-treeview.is-expanded .lre-atc-treeview-arrow {
    transform: rotate(90deg);
}

.lre-atc-treeview-children {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease;
    background: var(--lre-atc-hover, rgba(0, 0, 0, 0.02));
}

.lre-atc-treeview-children[aria-hidden="false"] {
    max-height: 200px;
}

.lre-atc-treeview-child {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px 10px 28px;
    background: transparent;
    border: none;
    color: var(--lre-atc-text, #1e293b);
    font-size: 0.85em;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease;
    text-align: left;
}

.lre-atc-treeview-child:hover {
    background: var(--lre-atc-hover, rgba(0, 0, 0, 0.06));
}

.lre-atc-treeview-child:not(:last-child) {
    border-bottom: 1px solid var(--lre-atc-border, rgba(0, 0, 0, 0.04));
}

.lre-atc-treeview-branch {
    color: var(--lre-atc-muted, #94a3b8);
    font-family: monospace;
    font-size: 0.9em;
    line-height: 1;
}

/* Disabled series download option */
.lre-atc-download-series-disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.lre-atc-download-series-disabled:hover {
    background: transparent !important;
}

/* Dark mode treeview */
.lre-atc-wrapper.dark-mode .lre-atc-treeview-toggle {
    color: var(--lre-atc-text, #e2e8f0);
}

.lre-atc-wrapper.dark-mode .lre-atc-treeview-toggle:hover {
    background: var(--lre-atc-hover, rgba(255, 255, 255, 0.08));
}

.lre-atc-wrapper.dark-mode .lre-atc-treeview-children {
    background: var(--lre-atc-hover, rgba(255, 255, 255, 0.03));
}

.lre-atc-wrapper.dark-mode .lre-atc-treeview-child {
    color: var(--lre-atc-text, #e2e8f0);
}

.lre-atc-wrapper.dark-mode .lre-atc-treeview-child:hover {
    background: var(--lre-atc-hover, rgba(255, 255, 255, 0.1));
}

.lre-atc-wrapper.dark-mode .lre-atc-treeview-branch {
    color: var(--lre-atc-muted, #64748b);
}

/* ============================================
   OFFCANVAS INTEGRATION
   ============================================ */

.lre-offcanvas-add-to-calendar {
    margin: 0 25px 25px;
}

.lre-offcanvas-add-to-calendar .lre-atc-wrapper {
    width: 100%;
}

.lre-offcanvas-add-to-calendar .lre-atc-button {
    width: 100%;
    justify-content: center;
    background: transparent;
    color: var(--lre-panel-accent, var(--lre-atc-accent));
    border-color: var(--lre-panel-accent, var(--lre-atc-accent));
}

.lre-offcanvas-add-to-calendar .lre-atc-button:hover {
    background: var(--lre-panel-accent, var(--lre-atc-accent));
    color: #ffffff;
}

.lre-offcanvas-add-to-calendar .lre-atc-dropdown {
    width: 100%;
}

/* ============================================
   SHORTCODE WRAPPER
   ============================================ */

.lre-add-to-calendar-shortcode {
    display: inline-block;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 600px) {
    .lre-atc-dropdown {
        min-width: 180px;
    }
    
    .lre-atc-button {
        padding: 8px 14px;
        font-size: 13px;
    }
    
    .lre-atc-option {
        padding: 10px 14px;
        font-size: 13px;
    }
    
    .lre-offcanvas-add-to-calendar {
        margin: 0 20px 20px;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    .lre-atc-wrapper,
    .lre-atc-button,
    .lre-atc-dropdown,
    .lre-atc-option,
    .lre-atc-chevron {
        transition: none;
    }
}

/* Focus visible for keyboard navigation */
.lre-atc-button:focus-visible,
.lre-atc-option:focus-visible {
    outline: 2px solid var(--lre-atc-accent);
    outline-offset: 2px;
}

/* ============================================
   DARK MODE SUPPORT (via CSS variables)
   ============================================ */

.lre-atc-wrapper.dark-mode {
    --lre-atc-bg: #1f2937;
    --lre-atc-text: #f9fafb;
    --lre-atc-border: #374151;
}

.lre-atc-wrapper.dark-mode .lre-atc-option:hover {
    background: #374151;
}

.lre-atc-wrapper.dark-mode .lre-atc-option {
    border-bottom-color: #374151;
}