/* =========================================================
   AI Solutions — Section 2: What We Build
   Scoped under .nx-ai-solutions
   Does not modify Section 1 or homepage.
   ========================================================= */

.nx-ai-solutions {
    --nx-bg: #07080A;
    --nx-surface: #0D0F12;
    --nx-surface-2: #12151A;
    --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(5rem, 12vh, 9rem) 0;
    border-top: 1px solid var(--nx-border);
    overflow: hidden;
}

.nx-ai-solutions__inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--nx-content);
    margin: 0 auto;
    padding-left: var(--nx-pad);
    padding-right: var(--nx-pad);
}

.nx-ai-solutions__rail {
    position: absolute;
    top: clamp(5rem, 12vh, 9rem);
    right: max(1.25rem, calc((100vw - var(--nx-content)) / 2 + 0.5rem));
    display: none;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.55rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(146, 153, 165, 0.55);
    pointer-events: none;
    z-index: 0;
}

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

.nx-ai-solutions__rail-line {
    width: 1px;
    height: 2.5rem;
    margin: 0.15rem 0.35rem 0.15rem auto;
    background: linear-gradient(
        180deg,
        rgba(79, 124, 255, 0.15),
        rgba(79, 124, 255, 0.55),
        rgba(79, 124, 255, 0.15)
    );
}

@media (min-width: 1200px) {
    .nx-ai-solutions__rail {
        display: flex;
    }
}

/* ---------- Header ---------- */
.nx-ai-solutions__header {
    max-width: 44rem;
    margin-bottom: clamp(2.75rem, 6vw, 4.25rem);
}

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

.nx-ai-page .nx-ai-solutions h2.nx-ai-solutions__title {
    margin: 0 0 1.25rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-weight: 700;
    font-size: clamp(2.4rem, 5vw, 5.25rem);
    line-height: 1.02;
    letter-spacing: -0.035em;
    color: var(--nx-text);
    max-width: 12ch;
}

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

.nx-ai-solutions__lede {
    margin: 0;
    max-width: 38rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: clamp(1rem, 1.3vw, 1.125rem);
    line-height: 1.65;
    color: var(--nx-text-muted);
}

.nx-ai-solutions__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    margin-top: 1.5rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(146, 153, 165, 0.75);
}

.nx-ai-solutions__meta strong {
    color: var(--nx-accent);
    font-weight: 600;
}

/* ---------- Grid ---------- */
.nx-ai-solutions__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--nx-border);
    border-left: 1px solid var(--nx-border);
}

.nx-ai-solutions__item {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100%;
    padding: clamp(1.5rem, 3vw, 2.15rem);
    background: transparent;
    border-right: 1px solid var(--nx-border);
    border-bottom: 1px solid var(--nx-border);
    transition:
        background-color 0.3s ease,
        border-color 0.3s ease,
        transform 0.3s ease;
}

.nx-ai-solutions__item:hover {
    background: rgba(13, 15, 18, 0.85);
    transform: translateY(-2px);
    z-index: 1;
}

.nx-ai-solutions__item:hover {
    box-shadow:
        inset 0 0 0 1px rgba(79, 124, 255, 0.28),
        0 18px 40px rgba(0, 0, 0, 0.25);
}

.nx-ai-solutions__top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.15rem;
}

.nx-ai-solutions__num {
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: clamp(1.75rem, 2.5vw, 2.35rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
    color: rgba(245, 247, 250, 0.18);
    transition: color 0.3s ease, transform 0.3s ease;
}

.nx-ai-solutions__item:hover .nx-ai-solutions__num {
    color: var(--nx-accent);
    transform: translateX(2px);
}

.nx-ai-solutions__arrow {
    opacity: 0;
    transform: translate(-4px, 4px);
    color: var(--nx-accent);
    font-size: 1rem;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.nx-ai-solutions__item:hover .nx-ai-solutions__arrow {
    opacity: 1;
    transform: translate(0, 0);
}

.nx-ai-solutions__category {
    margin: 0 0 0.7rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--nx-text-muted);
    transition: color 0.3s ease;
}

.nx-ai-solutions__item:hover .nx-ai-solutions__category {
    color: #b7c7ff;
}

.nx-ai-page .nx-ai-solutions h3.nx-ai-solutions__headline {
    margin: 0 0 0.85rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: clamp(1.2rem, 1.7vw, 1.45rem);
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.025em;
    color: var(--nx-text);
    max-width: 18ch;
}

.nx-ai-solutions__desc {
    margin: 0 0 1.35rem;
    flex: 1;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--nx-text-muted);
    max-width: 34ch;
}

.nx-ai-solutions__examples {
    margin: 0;
    padding-top: 1rem;
    border-top: 1px solid var(--nx-border);
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.78rem;
    line-height: 1.55;
    color: rgba(146, 153, 165, 0.9);
    letter-spacing: 0.01em;
}

/* ---------- Bridge ---------- */
.nx-ai-solutions__bridge {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem 2rem;
    margin-top: clamp(2.5rem, 5vw, 3.75rem);
    padding-top: clamp(1.75rem, 3vw, 2.25rem);
    border-top: 1px solid var(--nx-border);
}

.nx-ai-solutions__bridge-copy {
    margin: 0;
    max-width: 36rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: clamp(1rem, 1.4vw, 1.15rem);
    line-height: 1.55;
    color: var(--nx-text-muted);
}

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

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

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

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

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

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

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

    .nx-ai-solutions__item,
    .nx-ai-solutions__num,
    .nx-ai-solutions__arrow,
    .nx-ai-solutions__category,
    .nx-ai-solutions__bridge-link span[aria-hidden="true"] {
        transition: none;
    }

    .nx-ai-solutions__item:hover {
        transform: none;
    }

    .nx-ai-solutions__item:hover .nx-ai-solutions__num {
        transform: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .nx-ai-solutions {
        padding: clamp(4.5rem, 10vh, 6.5rem) 0;
    }

    .nx-ai-page .nx-ai-solutions h2.nx-ai-solutions__title {
        max-width: 14ch;
    }
}

@media (max-width: 768px) {
    .nx-ai-solutions__grid {
        grid-template-columns: 1fr;
    }

    .nx-ai-solutions__desc,
    .nx-ai-page .nx-ai-solutions h3.nx-ai-solutions__headline {
        max-width: none;
    }

    .nx-ai-solutions__item:hover {
        transform: none;
    }

    .nx-ai-solutions__arrow {
        display: none;
    }
}

@media (max-width: 480px) {
    .nx-ai-solutions__item {
        padding: 1.35rem 1.15rem;
    }

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