/* =========================================================
   AI Solutions — Section 3: How We Build
   Scoped under .nx-ai-process
   Does not modify Sections 1–2 or homepage.
   ========================================================= */

.nx-ai-process {
    --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(5.5rem, 14vh, 10rem) 0 clamp(5rem, 12vh, 9.5rem);
    border-top: 1px solid var(--nx-border);
    overflow: hidden;
}

.nx-ai-process__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);
}

/* ---------- Header ---------- */
.nx-ai-process__header {
    max-width: 44rem;
    margin-bottom: clamp(2.75rem, 6vw, 4.5rem);
}

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

.nx-ai-page .nx-ai-process h2.nx-ai-process__title {
    margin: 0 0 1.25rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-weight: 700;
    font-size: clamp(2.35rem, 5vw, 5.25rem);
    line-height: 1.02;
    letter-spacing: -0.035em;
    color: var(--nx-text);
    max-width: 14ch;
}

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

.nx-ai-process__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-process__flow-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.65rem;
    align-items: center;
    margin-top: 1.5rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(146, 153, 165, 0.7);
}

.nx-ai-process__flow-meta .sep {
    color: rgba(79, 124, 255, 0.55);
}

/* ---------- Timeline ---------- */
.nx-ai-process__timeline-wrap {
    position: relative;
}

.nx-ai-process__timeline {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
}

.nx-ai-process__track {
    position: absolute;
    top: 1.15rem;
    left: 8%;
    right: 8%;
    height: 1px;
    background: linear-gradient(
        90deg,
        rgba(79, 124, 255, 0.15),
        rgba(79, 124, 255, 0.55),
        rgba(79, 124, 255, 0.15)
    );
    pointer-events: none;
    z-index: 0;
}

.nx-ai-process__step {
    position: relative;
    z-index: 1;
    padding: 0 clamp(0.65rem, 1.2vw, 1.1rem) 0;
    transition: transform 0.3s ease;
}

.nx-ai-process__step:first-child {
    padding-left: 0;
}

.nx-ai-process__step:last-child {
    padding-right: 0;
}

.nx-ai-process__node {
    position: relative;
    width: 1.15rem;
    height: 1.15rem;
    margin-bottom: 1.35rem;
    border-radius: 50%;
    border: 1px solid rgba(79, 124, 255, 0.45);
    background: var(--nx-bg);
    box-shadow: 0 0 0 4px rgba(7, 8, 10, 1);
    transition:
        border-color 0.3s ease,
        background-color 0.3s ease,
        box-shadow 0.3s ease;
}

.nx-ai-process__node::after {
    content: "";
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: rgba(79, 124, 255, 0.35);
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.nx-ai-process__num {
    display: block;
    margin-bottom: 0.55rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: clamp(1.35rem, 1.8vw, 1.75rem);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1;
    color: rgba(245, 247, 250, 0.22);
    transition: color 0.3s ease, transform 0.3s ease;
}

.nx-ai-process__label {
    display: block;
    margin-bottom: 0.55rem;
    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-page .nx-ai-process h3.nx-ai-process__headline {
    margin: 0 0 0.65rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: clamp(1.05rem, 1.35vw, 1.2rem);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--nx-text);
    max-width: 14ch;
}

.nx-ai-process__desc {
    margin: 0;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--nx-text-muted);
    max-width: 22ch;
    transition: color 0.3s ease;
}

.nx-ai-process__accent {
    display: block;
    width: 0;
    height: 1px;
    margin-top: 1rem;
    background: var(--nx-accent);
    transition: width 0.35s ease;
}

@media (hover: hover) and (pointer: fine) {
    .nx-ai-process__step:hover .nx-ai-process__node {
        border-color: var(--nx-accent);
        background: rgba(79, 124, 255, 0.08);
    }

    .nx-ai-process__step:hover .nx-ai-process__node::after {
        background: var(--nx-accent);
        transform: scale(1.05);
    }

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

    .nx-ai-process__step:hover .nx-ai-process__label {
        color: #b7c7ff;
    }

    .nx-ai-process__step:hover .nx-ai-process__desc {
        color: rgba(183, 190, 201, 0.95);
    }

    .nx-ai-process__step:hover .nx-ai-process__accent {
        width: 2.5rem;
    }
}

/* ---------- Human in the loop ---------- */
.nx-ai-process__human {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: end;
    margin-top: clamp(3.25rem, 7vw, 5rem);
    padding-top: clamp(2rem, 4vw, 2.75rem);
    border-top: 1px solid var(--nx-border);
}

.nx-ai-page .nx-ai-process h3.nx-ai-process__human-title {
    margin: 0 0 0.9rem;
    font-family: var(--font-display, 'Syne', sans-serif);
    font-size: clamp(1.35rem, 2.4vw, 2rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    color: var(--nx-text);
    max-width: 16ch;
}

.nx-ai-process__human-title span {
    display: block;
    color: var(--nx-text-muted);
}

.nx-ai-process__human-copy {
    margin: 0;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.98rem;
    line-height: 1.65;
    color: var(--nx-text-muted);
    max-width: 34rem;
}

.nx-ai-process__workflow {
    justify-self: end;
    width: 100%;
    max-width: 22rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--nx-border);
    border-radius: 12px;
    background: rgba(13, 15, 18, 0.65);
}

.nx-ai-process__workflow-label {
    display: block;
    margin-bottom: 0.75rem;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(146, 153, 165, 0.75);
}

.nx-ai-process__workflow-flow {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.45rem;
    margin: 0;
    padding: 0;
    list-style: none;
    font-family: var(--font-body, 'DM Sans', sans-serif);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--nx-text-muted);
}

.nx-ai-process__workflow-flow li.arrow {
    color: rgba(79, 124, 255, 0.7);
    font-weight: 500;
    letter-spacing: 0;
}

.nx-ai-process__workflow-flow li.hand {
    color: #b7c7ff;
}

/* ---------- CTA ---------- */
.nx-ai-process__cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem 1.75rem;
    margin-top: clamp(2.5rem, 5vw, 3.5rem);
    padding-top: clamp(1.5rem, 3vw, 2rem);
    border-top: 1px solid var(--nx-border);
}

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

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

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

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

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

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

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

    .nx-ai-process__step,
    .nx-ai-process__node,
    .nx-ai-process__node::after,
    .nx-ai-process__num,
    .nx-ai-process__label,
    .nx-ai-process__desc,
    .nx-ai-process__accent,
    .nx-ai-process__cta-link span[aria-hidden="true"] {
        transition: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .nx-ai-process__timeline {
        grid-template-columns: repeat(5, minmax(0, 1fr));
        gap: 0.35rem;
    }

    .nx-ai-process__desc {
        max-width: none;
        font-size: 0.85rem;
    }

    .nx-ai-page .nx-ai-process h3.nx-ai-process__headline {
        max-width: none;
    }
}

@media (max-width: 900px) {
    .nx-ai-process {
        padding: clamp(4.75rem, 10vh, 6.5rem) 0 clamp(4.25rem, 9vh, 5.5rem);
    }

    .nx-ai-process__human {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .nx-ai-process__workflow {
        justify-self: start;
        max-width: none;
    }

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

    .nx-ai-process__timeline {
        grid-template-columns: 1fr;
        gap: 0;
        padding-left: 1.35rem;
        border-left: 1px solid rgba(79, 124, 255, 0.28);
    }

    .nx-ai-process__step {
        padding: 0 0 1.75rem 1.15rem;
        position: relative;
    }

    .nx-ai-process__step:last-child {
        padding-bottom: 0;
    }

    .nx-ai-process__node {
        position: absolute;
        left: -1.72rem;
        top: 0.15rem;
        margin: 0;
        box-shadow: 0 0 0 4px var(--nx-bg);
    }

    .nx-ai-process__num {
        margin-bottom: 0.4rem;
    }

    .nx-ai-process__desc {
        max-width: 42ch;
    }
}

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

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

    .nx-ai-process__flow-meta {
        letter-spacing: 0.1em;
    }
}