/**
 * Brand Switcher - Shared styles for ecosystem dropdown
 * Used by: learning-modern.php (homepage.css), hrmeisterteile.php
 * 
 * Theme tokens set per-page via :root or inline style:
 * - Light theme (default): uses standard design-system vars
 * - Dark theme: override tokens with dark values
 */

/* ============================================
   BRAND SWITCHER CORE
   ============================================ */

.brand-switcher {
    position: relative;
}

.brand-switcher .logo,
.brand-switcher .brand-switcher-toggle {
    position: relative;
    background: none;
    border: none;
    padding: 0;
    margin: 0;
    font: inherit;
    color: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
}

.brand-switcher-arrow {
    margin-left: var(--space-xs);
    opacity: 0.4;
    transition: all var(--transition-base);
}

/* ============================================
   DROPDOWN PANEL
   ============================================ */

.brand-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: var(--brand-switcher-offset, calc(var(--space-md) + 10px));
    min-width: 280px;
    background: var(--brand-switcher-bg, rgba(255, 255, 255, 0.9));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    box-shadow: var(--brand-switcher-shadow, 0 10px 40px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05));
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-base);
    z-index: 10000;
    overflow: hidden;
}

/* ============================================
   HOVER (Desktop with mouse)
   ============================================ */

@media (hover: hover) and (pointer: fine) {
    .brand-switcher:hover .brand-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .brand-switcher:hover .brand-switcher-arrow {
        opacity: 1;
        transform: rotate(180deg);
    }
}

/* ============================================
   CLICK/TOUCH OPEN STATE
   ============================================ */

.brand-switcher:focus-within .brand-dropdown,
.brand-switcher.open .brand-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.brand-switcher.open .brand-switcher-arrow {
    transform: rotate(180deg);
}

/* Touch-only blur of page when brand switcher is open */
html.touch-device body.brand-switcher-open > *:not(.site-header):not(.page-header) {
    filter: blur(8px);
    transition: filter var(--transition-base);
}

/* ============================================
   DROPDOWN CONTENT
   ============================================ */

.brand-dropdown-header {
    padding: var(--space-md) var(--space-md);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--brand-switcher-header-color, var(--text-tertiary));
    border-bottom: 1px solid var(--brand-switcher-border, var(--gray-100));
}

.brand-dropdown-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.brand-dropdown-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-sm) var(--space-md);
    text-decoration: none;
    color: var(--brand-switcher-text, var(--text-primary));
    position: relative;
    transition: all var(--transition-fast);
}

.brand-dropdown-item:hover {
    background: var(--brand-switcher-hover-bg, var(--gray-50));
}

/* NOTE: Brand-specific hover/active colors are in brand-colors.css */

.brand-dropdown-item.active .brand-dropdown-name {
    font-weight: var(--font-semibold);
}

.brand-dropdown-name {
    font-size: var(--text-base);
    font-weight: var(--font-medium);
}

.brand-dropdown-desc {
    font-size: var(--text-xs);
    color: var(--brand-switcher-desc-color, var(--text-tertiary));
}

.brand-dropdown-check {
    position: absolute;
    right: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--brand-switcher-check-color, var(--brand-primary));
}

/* ============================================
   PARENT ITEM (OneSolution)
   ============================================ */

.brand-dropdown-parent {
    border-bottom: 1px solid var(--brand-switcher-border, var(--gray-100));
}

.brand-dropdown-item.parent {
    background: linear-gradient(135deg, rgba(94, 106, 210, 0.05) 0%, rgba(110, 86, 207, 0.03) 100%);
}

.brand-dropdown-item.parent .brand-dropdown-name {
    font-weight: var(--font-semibold);
}

.brand-dropdown-item.parent::before {
    content: '★';
    position: absolute;
    right: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    color: var(--brand-primary);
    opacity: 0.6;
}

/* ============================================
   FOOTER (HRSchool external link)
   ============================================ */

.brand-dropdown-footer {
    border-top: 1px solid var(--brand-switcher-border, var(--gray-200));
    margin-top: 0;
    padding-top: 0;
}

/* NOTE: HRSchool brand colors are in brand-colors.css */
.brand-dropdown-hrschool .brand-dropdown-desc {
    color: var(--brand-switcher-desc-color, var(--text-tertiary));
}

.brand-dropdown-hrschool .external-icon {
    position: absolute;
    right: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
}