/**
 * @file
 * Card Accordion Component
 * 
 * A responsive two-column accordion grid for displaying expandable content cards.
 * 
 * USAGE:
 * ------
 * Wrap cards in .card-accordion-grid container.
 * Each card uses .card-accordion with .card-accordion-header and .card-accordion-content.
 * 
 * GRADIENT COLORS:
 * ----------------
 * Add any gradient class from gradients.css to the .card-accordion-header element.
 * Example: <div class="card-accordion-header gradient-smaragd-aquamarin">
 * 
 * Available gradients include:
 *   - gradient-smaragd-aquamarin (teal tones)
 *   - gradient-aprikose-preussen (warm to cool)
 *   - gradient-himmel-kornblume (sky to blue)
 *   - gradient-flieder-rubin (lavender to ruby)
 *   - gradient-licht-amethyst (yellow to purple)
 *   - gradient-meer-smaragd (seafoam to emerald)
 *   ... and more in gradients.css
 */

/* ==========================================================================
   CARD ACCORDION - Grid Container
   ========================================================================== */

.card-accordion-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    width: 100%;
    box-sizing: border-box;
    align-items: start;
}

@media (max-width: 768px) {
    .card-accordion-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   CARD ACCORDION - Individual Card
   ========================================================================== */

.card-accordion {
    box-sizing: border-box;
    overflow: hidden;
    border-radius: 6px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.card-accordion:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.card-accordion.active {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   CARD ACCORDION - Header (clickable area)
   ========================================================================== */

.card-accordion-header {
    /* Default gradient - can be overridden by adding a gradient-* class */
    background: linear-gradient(135deg, rgba(11, 111, 114, 0.95) 0%, rgba(20, 140, 145, 0.9) 100%);
    color: white;
    padding: 0.9rem 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 60px;
    transition: all 0.3s ease;
}

.card-accordion-title {
    font-family: Figtree, sans-serif;
    font-weight: 600;
    line-height: 1.3;
    margin: 0;
    text-align: left;
    flex: 1;
    padding-right: 1rem;
    color: white;
    letter-spacing: normal;
    text-transform: none;
}

/* ==========================================================================
   CARD ACCORDION - Icon (plus/minus indicator)
   ========================================================================== */

.card-accordion-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.card-accordion-icon::before,
.card-accordion-icon::after {
    content: '';
    position: absolute;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.card-accordion-icon::before {
    width: 12px;
    height: 2px;
}

.card-accordion-icon::after {
    width: 2px;
    height: 12px;
}

/* Active state - transforms plus to minus */
.card-accordion.active .card-accordion-icon {
    transform: rotate(180deg);
    background: rgba(255, 255, 255, 0.35);
}

.card-accordion.active .card-accordion-icon::after {
    height: 0;
    opacity: 0;
}

/* ==========================================================================
   CARD ACCORDION - Content (expandable area)
   ========================================================================== */

.card-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s linear 0.4s;
    background: white;
    visibility: hidden;
}

.card-accordion-content-inner {
    padding: 1.25rem;
    color: #374151;
    line-height: 1.6;
    font-family: Figtree, sans-serif;
    letter-spacing: normal;
    text-transform: none;
}

.card-accordion.active .card-accordion-content {
    max-height: 300px;
    overflow-y: auto;
    visibility: visible;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s linear 0s;
}

/* Lightweight scrollbar styling */
.card-accordion-content::-webkit-scrollbar {
    width: 5px;
}

.card-accordion-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 3px;
}

.card-accordion-content::-webkit-scrollbar-thumb {
    background: #c0c0c0;
    border-radius: 3px;
}

.card-accordion-content::-webkit-scrollbar-thumb:hover {
    background: #a0a0a0;
}

/* ==========================================================================
   CARD ACCORDION - Header Overlay Options
   ========================================================================== */

/**
 * Transparent white center overlay
 * Usage: Add class "card-accordion-overlay-white" to .card-accordion-header
 * Example: <div class="card-accordion-header gradient-smaragd-aquamarin card-accordion-overlay-white">
 */
.card-accordion-header.card-accordion-overlay-white {
    position: relative;
    overflow: hidden;
}

.card-accordion-header.card-accordion-overlay-white::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.25);
    pointer-events: none;
    z-index: 1;
}

/* Ensure title stays readable above overlay */
.card-accordion-header.card-accordion-overlay-white .card-accordion-title {
    position: relative;
    z-index: 2;
}

/* Ensure icon stays on top of all layers */
.card-accordion-header.card-accordion-overlay-white .card-accordion-icon {
    position: relative;
    z-index: 3;
}

/* ==========================================================================
   CARD ACCORDION - Title Text Shadow Options
   ========================================================================== */

/**
 * Light text shadow for title
 * Usage: Add class "card-accordion-title-shadow" to .card-accordion-title
 * Example: <h4 class="card-accordion-title card-accordion-title-shadow">
 */
.card-accordion-title.card-accordion-title-shadow {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

/* Stronger shadow variant */
.card-accordion-title.card-accordion-title-shadow-strong {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}