/* ============================================
   U.S. FAQ — Native <details> disclosure list
   Adapts Summit "FAQ accordion" pattern.
   No JS — keyboard, screen-reader and touch
   behavior are inherited from <details>/<summary>.
   ============================================ */

.usa-faq {
    background: var(--color-pure-white);
    border-top: 1px solid var(--color-border);
    padding: var(--section-padding) 0;
}

.usa-faq__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: minmax(0, 380px) 1fr;
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: start;
}

.usa-faq__eyebrow {
    display: inline-block;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    letter-spacing: var(--tracking-widest);
    text-transform: uppercase;
    color: var(--color-text-primary);
    margin: 0 0 var(--space-4);
}

.usa-faq__title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3.75vw, 3.25rem);
    font-weight: var(--font-semibold);
    line-height: var(--leading-tight);
    letter-spacing: -0.6px;
    color: var(--color-text-primary);
    margin: 0 0 var(--space-5);
}

.usa-faq__intro {
    font-family: var(--font-body);
    font-size: var(--text-lg);
    line-height: var(--leading-normal);
    color: var(--color-text-secondary);
    margin: 0;
}

.usa-faq__list {
    display: flex;
    flex-direction: column;
}

.usa-faq__item {
    border-top: 1px solid var(--color-border);
    transition: border-color var(--duration-base) var(--ease-out);
}

.usa-faq__item:last-child {
    border-bottom: 1px solid var(--color-border);
}

.usa-faq__item.is-open {
    border-color: var(--color-text-primary);
}

.usa-faq__item.is-open + .usa-faq__item {
    border-top-color: var(--color-text-primary);
}

.usa-faq__q {
    appearance: none;
    border: 0;
    width: 100%;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    padding: var(--space-6) 0;
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    line-height: var(--leading-snug);
    letter-spacing: -0.3px;
    color: var(--color-text-primary);
    text-align: left;
    transition: color var(--duration-base) var(--ease-out);
}

.usa-faq__q:hover {
    color: var(--color-navy);
}

.usa-faq__q:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 4px;
    border-radius: 2px;
}

.usa-faq__q-text {
    flex: 1 1 auto;
    min-width: 0;
}

.usa-faq__q-icon {
    flex: 0 0 auto;
    width: 28px;
    height: 28px;
    position: relative;
    transition: transform var(--duration-base) var(--ease-out);
}

.usa-faq__q-icon::before,
.usa-faq__q-icon::after {
    content: '';
    position: absolute;
    inset: 50% 0 auto 0;
    height: 1.5px;
    background: var(--color-text-primary);
    transform-origin: center;
    transition: transform var(--duration-base) var(--ease-out);
}

.usa-faq__q-icon::after {
    transform: rotate(90deg);
}

.usa-faq__item.is-open .usa-faq__q-icon::after {
    transform: rotate(0deg);
}

/* Smooth grid-rows expand — same technique as the homepage FAQ.
   Wrapper goes from 0fr to 1fr; inner clips overflow during the
   transition so the answer eases in instead of jumping. */
.usa-faq__a-wrap {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.usa-faq__a-inner {
    overflow: hidden;
}

.usa-faq__item.is-open .usa-faq__a-wrap {
    grid-template-rows: 1fr;
}

.usa-faq__a {
    max-width: 64ch;
    padding: 0 0 var(--space-7);
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-secondary);
    margin: 0;
}

@media (max-width: 900px) {
    .usa-faq__inner {
        grid-template-columns: 1fr;
        gap: clamp(2rem, 4vw, 3rem);
    }

    .usa-faq__header {
        position: static;
    }
}

@media (max-width: 480px) {
    .usa-faq__q {
        font-size: var(--text-base);
        padding: var(--space-5) 0;
    }
}