/**
 * Geese Project Design System — Accordion Component
 * Phase 2a-1: Bootstrap 5 Accordion Styling
 * 
 * Adapts Bootstrap 5's accordion structure to match hard-rule design system §16
 * Preserves all Bootstrap JS behavior (data-bs-toggle, data-bs-target, collapse plugin)
 */

/* ---------- Accordion Items ---------- */
.gp-ds .accordion-item {
    border: 1px solid var(--gp-border);
    border-radius: 12px;
    margin-bottom: 10px;
    overflow: hidden;
    background: var(--gp-surface);
}

.gp-ds .accordion-item:last-child {
    margin-bottom: 0;
}

/* ---------- Accordion Header ---------- */
.gp-ds .accordion-header {
    margin-bottom: 0; /* Reset Bootstrap default */
}

/* ---------- Accordion Button ---------- */
.gp-ds .accordion-button {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 18px;
    cursor: pointer;
    font-family: var(--gp-font-head);
    font-weight: 700;
    font-size: 14px;
    background-color: transparent; /* Override Bootstrap default */
    color: var(--gp-fg);
    border: none;
    border-radius: 0; /* Override Bootstrap radius */
    width: 100%;
    text-align: left;
    box-shadow: none; /* Remove Bootstrap focus shadow */
    transition: none; /* Remove Bootstrap transitions */
}

.gp-ds .accordion-button:hover {
    background-color: transparent;
}

.gp-ds .accordion-button:not(.collapsed) {
    background-color: transparent;
    color: var(--gp-fg);
    box-shadow: none;
}

.gp-ds .accordion-button:focus {
    outline: 2px solid var(--gp-gold-deep);
    outline-offset: -2px;
    box-shadow: none;
    border-color: transparent;
    z-index: 1;
}

/* ---------- Chevron Icon (Bootstrap ::after) ---------- */
.gp-ds .accordion-button::after {
    /* Bootstrap adds chevron via ::after pseudo-element */
    transition: transform var(--gp-dur-base) var(--gp-ease-out);
    color: var(--gp-fg-faint);
    flex-shrink: 0;
    background-image: none; /* Remove Bootstrap SVG */
    content: '⌄'; /* Use simple text chevron */
    font-size: 18px;
    line-height: 1;
    width: auto;
    height: auto;
}

.gp-ds .accordion-button:not(.collapsed)::after {
    transform: rotate(180deg);
}

/* ---------- Accordion Collapse ---------- */
.gp-ds .accordion-collapse {
    border: none; /* Remove Bootstrap border */
}

/* ---------- Accordion Body ---------- */
.gp-ds .accordion-body {
    padding: 0 18px 18px;
    color: var(--gp-fg-muted);
    font-size: 13.5px;
    line-height: 1.7;
}

/* ---------- Dark Mode ---------- */
/* Dark mode colors handled automatically via CSS variables (--gp-fg, --gp-border, etc.) */
/* No explicit @media (prefers-color-scheme: dark) needed */