/* =========================================================
   AI Solutions — Section 6: FAQ
   Scoped under .nx-ai-faq
   Does not modify Sections 1–5 or homepage.
   ========================================================= */

.nx-ai-faq {
    --nx-bg: #07080A;
    --nx-surface: #0D0F12;
    --nx-text: #F5F7FA;
    --nx-text-muted: #9299A5;
    --nx-border: rgba(255, 255, 255, 0.08);
    --nx-accent: #4F7CFF;
    --nx-accent-hover: #6B8FFF;
    --nx-content: 1320px;
    --nx-pad: clamp(1.25rem, 4vw, 4rem);

    position: relative;
    background: var(--nx-bg);
    color: var(--nx-text);
    padding: clamp(5.5rem, 14vh, 10rem) 0;
    border-top: 1px solid var(--nx-border);
    overflow: hidden;
}

.nx-ai-faq__inner {
    width: 100%;
    max-width: var(--nx-content);
    margin: 0 auto;
    padding-left: var(--nx-pad);
    padding-right: var(--nx-pad);
}

.nx-ai-faq__layout {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.2fr);
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: start;
}

/* ---------- Intro ---------- */
.nx-ai-faq__intro {
    position: sticky;
    top: 6.5rem;
}

.nx-ai-faq__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    margin: 0 0 1.25rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--nx-text-muted);
}

.nx-ai-faq__eyebrow-accent {
    color: var(--nx-accent);
}

.nx-ai-page .nx-ai-faq h2.nx-ai-faq__title {
    margin: 0 0 1.25rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-weight: 700;
    font-size: clamp(2.35rem, 5vw, 5rem);
    line-height: 1.02;
    letter-spacing: -0.035em;
    color: var(--nx-text);
    max-width: 12ch;
}

.nx-ai-faq__title span {
    display: block;
}

.nx-ai-faq__lede {
    margin: 0 0 1.5rem;
    max-width: 30rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: clamp(1rem, 1.25vw, 1.1rem);
    line-height: 1.65;
    color: var(--nx-text-muted);
}

.nx-ai-faq__note {
    margin: 0;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(146, 153, 165, 0.75);
}

/* ---------- List ---------- */
.nx-ai-faq__list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--nx-border);
}

.nx-ai-faq__item {
    border-bottom: 1px solid var(--nx-border);
}

.nx-ai-faq__item.is-open {
    border-bottom-color: rgba(79, 124, 255, 0.28);
}

.nx-ai-faq__question {
    width: 100%;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 1rem 1.15rem;
    align-items: center;
    min-height: 4.25rem;
    padding: 1.15rem 0;
    margin: 0;
    border: 0;
    background: transparent;
    color: inherit;
    text-align: left;
    cursor: pointer;
    font: inherit;
}

.nx-ai-faq__question:focus-visible {
    outline: 2px solid var(--nx-accent);
    outline-offset: 4px;
    border-radius: 4px;
}

.nx-ai-faq__num {
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: rgba(245, 247, 250, 0.28);
    transition: color 0.25s ease;
}

.nx-ai-faq__item.is-open .nx-ai-faq__num {
    color: var(--nx-accent);
}

.nx-ai-faq__q-text {
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: clamp(1rem, 1.4vw, 1.2rem);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--nx-text);
    text-transform: uppercase;
}

.nx-ai-faq__icon {
    position: relative;
    width: 1.35rem;
    height: 1.35rem;
    flex-shrink: 0;
    color: var(--nx-text-muted);
}

.nx-ai-faq__icon::before,
.nx-ai-faq__icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    background: currentColor;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.nx-ai-faq__icon::before {
    width: 12px;
    height: 1.5px;
    transform: translate(-50%, -50%);
}

.nx-ai-faq__icon::after {
    width: 1.5px;
    height: 12px;
    transform: translate(-50%, -50%);
}

.nx-ai-faq__item.is-open .nx-ai-faq__icon {
    color: var(--nx-accent);
}

.nx-ai-faq__item.is-open .nx-ai-faq__icon::after {
    opacity: 0;
    transform: translate(-50%, -50%) scaleY(0);
}

.nx-ai-faq__answer {
    overflow: hidden;
    max-height: 0;
    opacity: 0;
    transition:
        max-height 0.35s ease,
        opacity 0.3s ease,
        padding 0.3s ease;
}

.nx-ai-faq__item.is-open .nx-ai-faq__answer {
    max-height: 28rem;
    opacity: 1;
    padding-bottom: 1.35rem;
}

.nx-ai-faq__answer-inner {
    max-width: 40rem;
    padding-left: calc(0.95rem + 1.15rem);
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.98rem;
    line-height: 1.65;
    color: var(--nx-text-muted);
}

.nx-ai-faq__answer-inner p {
    margin: 0 0 0.75rem;
}

.nx-ai-faq__answer-inner p:last-child {
    margin-bottom: 0;
}

/* ---------- Close CTA ---------- */
.nx-ai-faq__cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 1.75rem;
    margin-top: clamp(2.25rem, 4vw, 3rem);
    padding-top: clamp(1.5rem, 3vw, 2rem);
    border-top: 1px solid var(--nx-border);
}

.nx-ai-faq__cta-copy {
    margin: 0;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: clamp(1rem, 1.35vw, 1.15rem);
    color: var(--nx-text-muted);
}

.nx-ai-faq__cta-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--nx-text);
    text-decoration: none;
    border-bottom: 1px solid rgba(245, 247, 250, 0.25);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.nx-ai-faq__cta-link:hover {
    color: #fff;
    border-bottom-color: rgba(245, 247, 250, 0.55);
}

.nx-ai-faq__cta-link:focus-visible {
    outline: 2px solid var(--nx-accent);
    outline-offset: 3px;
}

.nx-ai-faq__cta-link span[aria-hidden="true"] {
    transition: transform 0.2s ease;
}

.nx-ai-faq__cta-link:hover span[aria-hidden="true"] {
    transform: translateX(3px);
}

/* ---------- Reveal ---------- */
.nx-ai-faq .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition:
        opacity 0.7s ease,
        transform 0.7s ease;
}

.nx-ai-faq .reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .nx-ai-faq .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .nx-ai-faq__answer,
    .nx-ai-faq__icon::before,
    .nx-ai-faq__icon::after,
    .nx-ai-faq__num,
    .nx-ai-faq__cta-link span[aria-hidden="true"] {
        transition: none;
    }

    .nx-ai-faq__item.is-open .nx-ai-faq__answer {
        max-height: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
    .nx-ai-faq__layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .nx-ai-faq__intro {
        position: static;
    }

    .nx-ai-page .nx-ai-faq h2.nx-ai-faq__title {
        max-width: 14ch;
    }
}

@media (max-width: 640px) {
    .nx-ai-faq__question {
        min-height: 3.5rem;
        gap: 0.85rem;
        padding: 1rem 0;
    }

    .nx-ai-faq__q-text {
        text-transform: none;
        font-size: 1.02rem;
    }

    .nx-ai-faq__answer-inner {
        padding-left: 0;
    }

    .nx-ai-faq__cta {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .nx-ai-page .nx-ai-faq h2.nx-ai-faq__title {
        max-width: none;
    }
}