/* ==========================================================================
   RootCoreX — sections.css
   Page-level section layouts. Single-use compositions live here; anything
   reused across two or more pages belongs in components.css.

   Load order: base.css → components.css → sections.css

   Reopens @layer components rather than declaring a new layer, so that
   utilities in base.css keep winning. Section padding declared here
   intentionally outranks .section in the layout layer.

   ---------------------------------------------------------------------------
   JS CONTRACT — additions beyond components.css:

     [data-count-to="1200"]        counter animates on first intersection
     .marquee[data-paused]         pauses on hover / reduced motion
     .docs-nav__link.is-active     scroll-spy on the on-this-page rail
     .terminal[data-typing]        Labs terminal type-out (optional)
   ========================================================================== */

@layer components {
  /* ==========================================================================
     1. HERO — home page
     ========================================================================== */

  .hero {
    position: relative;
    display: flex;
    align-items: center;
    min-block-size: min(100svh, 52rem);
    padding-block: calc(var(--header-height) + var(--space-4xl))
      var(--section-gap);
    overflow: hidden;
  }

  .hero__inner {
    position: relative;
    z-index: var(--z-raised);
    display: grid;
    gap: var(--space-3xl);
    align-items: center;
    grid-template-columns: 1fr;
  }

  .hero__content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-lg);
    max-inline-size: 42rem;
  }

  .hero__title {
    font-size: var(--text-5xl);
    font-weight: var(--weight-medium);
    letter-spacing: var(--tracking-tighter);
    line-height: 1.04;
  }

  /* The mission statement's operative word carries the accent. Once. */
  .hero__title em {
    font-style: normal;
    color: var(--color-accent);
  }

  .hero__lead {
    font-size: var(--text-md);
    line-height: var(--leading-relaxed);
    color: var(--color-text-muted);
    max-inline-size: 34rem;
  }

  .hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding-block-start: var(--space-xs);
  }

  .hero__note {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
  }

  @media (width >= 64rem) {
    .hero__inner {
      grid-template-columns: 1.05fr 0.95fr;
      gap: var(--space-4xl);
    }
  }

  /* --- Ambient background ------------------------------------------------
     Decorative only: aria-hidden, pointer-events none, animation limited to
     transform/opacity so it never triggers layout or paint on the main grid. */

  .hero__backdrop {
    position: absolute;
    inset: 0;
    z-index: var(--z-base);
    pointer-events: none;
    overflow: hidden;
  }

  /* Lattice: a certificate-grid the glows read through. */
  .hero__lattice {
    position: absolute;
    inset: -1px;
    background-image: linear-gradient(
        to right,
        var(--color-border) 1px,
        transparent 1px
      ),
      linear-gradient(to bottom, var(--color-border) 1px, transparent 1px);
    background-size: 5.5rem 5.5rem;
    mask-image: radial-gradient(
      ellipse 80% 60% at 50% 0%,
      #000 20%,
      transparent 78%
    );
    opacity: 0.7;
  }

  .hero__orb {
    position: absolute;
    inline-size: 34rem;
    block-size: 34rem;
    border-radius: var(--radius-full);
    filter: blur(90px);
    will-change: transform;
  }

  .hero__orb--primary {
    inset-block-start: -12rem;
    inset-inline-start: -8rem;
    background: radial-gradient(
      circle,
      rgb(var(--rcx-accent-rgb) / 0.16),
      transparent 65%
    );
    animation: rcx-drift-a 22s var(--ease-in-out) infinite alternate;
  }

  .hero__orb--secondary {
    inset-block-end: -16rem;
    inset-inline-end: -10rem;
    background: radial-gradient(circle, rgb(255 255 255 / 0.05), transparent 62%);
    animation: rcx-drift-b 28s var(--ease-in-out) infinite alternate;
  }

  @keyframes rcx-drift-a {
    to {
      transform: translate3d(6rem, 4rem, 0) scale(1.12);
    }
  }

  @keyframes rcx-drift-b {
    to {
      transform: translate3d(-5rem, -3rem, 0) scale(1.08);
    }
  }

  /* Scan beam — one slow pass, reads as a signing sweep. */
  .hero__beam {
    position: absolute;
    inset-block: 0;
    inline-size: 1px;
    inset-inline-start: 18%;
    background: linear-gradient(
      to bottom,
      transparent,
      var(--color-accent) 45%,
      transparent
    );
    opacity: 0.35;
    animation: rcx-scan 11s var(--ease-in-out) infinite;
  }

  @keyframes rcx-scan {
    0%,
    100% {
      transform: translateX(0);
      opacity: 0;
    }
    12% {
      opacity: 0.35;
    }
    88% {
      opacity: 0.35;
    }
    100% {
      transform: translateX(58vw);
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .hero__orb,
    .hero__beam {
      animation: none;
    }
    .hero__beam {
      opacity: 0.2;
    }
  }

  /* ==========================================================================
     2. TRUST CHAIN — hero visual
     Root CA → Issuing CA → End-entity certificate. The one diagram that
     explains what the company does without a paragraph of copy.
     ========================================================================== */

  .trust-chain {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background-color: rgb(17 17 17 / 0.6);
    box-shadow: var(--shadow-lg);
  }

  @supports (backdrop-filter: blur(1px)) {
    .trust-chain {
      backdrop-filter: blur(12px);
    }
  }

  .trust-chain__label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--color-text-faint);
  }

  .trust-chain__node {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-card);
  }

  /* Connector between links in the chain. */
  .trust-chain__node + .trust-chain__node::before {
    content: "";
    position: absolute;
    inset-block-start: calc(var(--space-md) * -1);
    inset-inline-start: calc(var(--space-md) + 1.25rem);
    inline-size: 1px;
    block-size: var(--space-md);
    background-color: var(--color-border-strong);
  }

  .trust-chain__node--active {
    border-color: var(--color-border-accent);
    box-shadow: var(--shadow-glow);
  }

  .trust-chain__icon {
    display: grid;
    place-items: center;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    background-color: var(--color-bg-surface);
    color: var(--color-text-muted);
  }

  .trust-chain__node--active .trust-chain__icon {
    color: var(--color-accent);
    background-color: var(--color-accent-faint);
  }

  .trust-chain__icon svg {
    inline-size: 1.15rem;
    block-size: 1.15rem;
  }

  .trust-chain__name {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
  }

  .trust-chain__meta {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
  }

  .trust-chain__status {
    margin-inline-start: auto;
    flex-shrink: 0;
  }

  /* ==========================================================================
     3. PAGE HEADER — every interior page
     ========================================================================== */

  .page-header {
    position: relative;
    padding-block: calc(var(--header-height) + var(--space-3xl))
      var(--section-gap-sm);
    border-block-end: 1px solid var(--color-border);
    overflow: hidden;
  }

  .page-header::before {
    content: "";
    position: absolute;
    inset-block-start: -18rem;
    inset-inline-start: 50%;
    inline-size: 42rem;
    block-size: 30rem;
    translate: -50% 0;
    background: radial-gradient(
      ellipse,
      rgb(var(--rcx-accent-rgb) / 0.09),
      transparent 66%
    );
    filter: blur(70px);
    pointer-events: none;
  }

  .page-header__inner {
    position: relative;
    z-index: var(--z-raised);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-inline-size: 46rem;
  }

  .page-header__title {
    font-size: var(--text-4xl);
  }

  /* ==========================================================================
     4. SECTION HEADING — shared block above content grids
     ========================================================================== */

  .section-head {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    max-inline-size: 44rem;
    margin-block-end: var(--space-3xl);
  }

  .section-head--split {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    max-inline-size: none;
    gap: var(--space-xl);
  }

  .section-head--center {
    align-items: center;
    text-align: center;
    margin-inline: auto;
  }

  .section-head__title {
    font-size: var(--text-3xl);
  }

  /* ==========================================================================
     5. FEATURE GRID — "Why RootCoreX"
     ========================================================================== */

  .feature {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .feature__title {
    font-size: var(--text-md);
    font-weight: var(--weight-medium);
  }

  .feature__text {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-muted);
  }

  /* Bordered variant: hairline rules instead of boxes, so a dense grid of
     capabilities doesn't turn into a wall of cards. */
  .feature-grid--ruled {
    --grid-gap: 0;
    border-block-start: 1px solid var(--color-border);
  }

  .feature-grid--ruled .feature {
    padding: var(--space-xl) var(--space-lg);
    border-block-end: 1px solid var(--color-border);
  }

  @media (width >= 48rem) {
    .feature-grid--ruled .feature {
      border-inline-end: 1px solid var(--color-border);
    }
    .feature-grid--ruled .feature:nth-child(3n) {
      border-inline-end: 0;
    }
  }

  /* ==========================================================================
     6. PRODUCT SECTIONS
     ========================================================================== */

  .product-grid {
    --grid-min: 21rem;
  }

  .product-card {
    --card-pad: var(--space-xl);
    gap: var(--space-lg);
  }

  .product-card__head {
    display: flex;
    align-items: center;
    gap: var(--space-md);
  }

  .product-card__name {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: var(--weight-medium);
  }

  .product-card__kicker {
    display: block;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--color-text-faint);
  }

  .product-card__benefits {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
  }

  .product-card__benefits li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .product-card__benefits li::before {
    content: "";
    inline-size: 0.85rem;
    block-size: 0.85rem;
    flex-shrink: 0;
    margin-block-start: 0.3rem;
    background-color: var(--color-accent);
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2.5 6.2 4.8 8.5 9.5 3.8'/%3E%3C/svg%3E");
    mask-repeat: no-repeat;
    mask-size: contain;
  }

  .product-card__roadmap {
    padding-block-start: var(--space-md);
    border-block-start: 1px solid var(--color-border);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    line-height: var(--leading-snug);
  }

  .product-card__roadmap dt {
    font-family: var(--font-mono);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    margin-block-end: 0.35rem;
  }

  .product-card__roadmap dd {
    margin: 0;
    color: var(--color-text-muted);
  }

  /* --- Alternating product detail rows (products.html) ------------------- */
  .product-detail {
    display: grid;
    gap: var(--space-2xl);
    align-items: center;
    grid-template-columns: 1fr;
    padding-block: var(--section-gap-sm);
    border-block-end: 1px solid var(--color-border);
  }

  .product-detail:last-child {
    border-block-end: 0;
  }

  .product-detail__visual {
    display: grid;
    place-items: center;
    min-block-size: 16rem;
    padding: var(--space-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: radial-gradient(
        ellipse at 50% 0%,
        var(--color-accent-faint),
        transparent 60%
      ),
      var(--color-bg-surface);
  }

  @media (width >= 62rem) {
    .product-detail {
      grid-template-columns: 1fr 1fr;
      gap: var(--space-4xl);
    }

    .product-detail:nth-child(even) .product-detail__visual {
      order: -1;
    }
  }

  /* ==========================================================================
     7. STATS BAND
     ========================================================================== */

  .stats-band {
    display: grid;
    gap: var(--space-xl);
    grid-template-columns: repeat(2, 1fr);
    padding-block: var(--space-2xl);
    border-block: 1px solid var(--color-border);
  }

  @media (width >= 62rem) {
    .stats-band {
      grid-template-columns: repeat(4, 1fr);
    }
  }

  /* ==========================================================================
     8. TECHNOLOGY MARQUEE
     ========================================================================== */

  .marquee {
    position: relative;
    overflow: hidden;
    mask-image: linear-gradient(
      90deg,
      transparent,
      #000 12%,
      #000 88%,
      transparent
    );
  }

  .marquee__track {
    display: flex;
    inline-size: max-content;
    gap: var(--space-3xl);
    animation: rcx-marquee 42s linear infinite;
  }

  .marquee:hover .marquee__track,
  .marquee[data-paused="true"] .marquee__track {
    animation-play-state: paused;
  }

  @keyframes rcx-marquee {
    to {
      transform: translateX(-50%);
    }
  }

  .marquee__item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-faint);
    white-space: nowrap;
  }

  @media (prefers-reduced-motion: reduce) {
    .marquee__track {
      animation: none;
      flex-wrap: wrap;
      inline-size: 100%;
      justify-content: center;
      gap: var(--space-lg) var(--space-xl);
    }
  }

  /* ==========================================================================
     9. BLOG & MEDIA
     ========================================================================== */

  .post-grid {
    --grid-min: 20rem;
  }

  .post-card {
    --card-pad: var(--space-lg);
  }

  .post-card__title {
    font-family: var(--font-display);
    font-size: var(--text-md);
    font-weight: var(--weight-medium);
    line-height: var(--leading-snug);
  }

  .post-card__excerpt {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: var(--leading-relaxed);
    /* Two-line clamp keeps a mixed-length feed on a consistent baseline. */
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    overflow: hidden;
  }

  /* Featured post: wide left, feed on the right. */
  .post-feature {
    display: grid;
    gap: var(--space-xl);
    grid-template-columns: 1fr;
  }

  @media (width >= 62rem) {
    .post-feature {
      grid-template-columns: 1.25fr 1fr;
      gap: var(--space-2xl);
    }
  }

  /* --- Video card -------------------------------------------------------- */
  .video-card__thumb {
    position: relative;
  }

  .video-card__thumb::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
      to top,
      rgb(5 5 5 / 0.7),
      transparent 55%
    );
  }

  .video-card__play {
    position: absolute;
    inset-block-end: var(--space-md);
    inset-inline-start: var(--space-md);
    z-index: var(--z-raised);
    display: grid;
    place-items: center;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    border-radius: var(--radius-full);
    background-color: var(--color-accent);
    color: var(--color-text-inverse);
    transition: transform var(--duration-base) var(--ease-spring);
  }

  .card--interactive:hover .video-card__play {
    transform: scale(1.08);
  }

  .video-card__duration {
    position: absolute;
    inset-block-end: var(--space-md);
    inset-inline-end: var(--space-md);
    z-index: var(--z-raised);
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-xs);
    background-color: rgb(5 5 5 / 0.8);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
  }

  /* ==========================================================================
     10. ROADMAP TIMELINE
     ========================================================================== */

  .roadmap {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
    padding-inline-start: var(--space-xl);
  }

  /* Spine. */
  .roadmap::before {
    content: "";
    position: absolute;
    inset-block: 0.5rem 0;
    inset-inline-start: 0;
    inline-size: 1px;
    background: linear-gradient(
      to bottom,
      var(--color-accent),
      var(--color-border) 30%,
      var(--color-border)
    );
  }

  .roadmap__item {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
  }

  .roadmap__item::before {
    content: "";
    position: absolute;
    inset-block-start: 0.45rem;
    inset-inline-start: calc(var(--space-xl) * -1);
    inline-size: 0.55rem;
    block-size: 0.55rem;
    translate: -50% 0;
    border-radius: var(--radius-full);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border-strong);
  }

  .roadmap__item--shipped::before {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px var(--color-accent-faint);
  }

  .roadmap__period {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--color-accent);
  }

  .roadmap__title {
    font-size: var(--text-md);
    font-weight: var(--weight-medium);
  }

  .roadmap__text {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    max-inline-size: var(--measure);
  }

  /* Horizontal on wide screens: quarters read left to right. */
  @media (width >= 62rem) {
    .roadmap--horizontal {
      flex-direction: row;
      padding-inline-start: 0;
      padding-block-start: var(--space-xl);
      gap: var(--space-xl);
    }

    .roadmap--horizontal::before {
      inset-block: 0 auto;
      inset-inline: 0;
      inline-size: 100%;
      block-size: 1px;
      background: linear-gradient(
        90deg,
        var(--color-accent),
        var(--color-border) 30%,
        var(--color-border)
      );
    }

    .roadmap--horizontal .roadmap__item {
      flex: 1;
    }

    .roadmap--horizontal .roadmap__item::before {
      inset-block-start: calc(var(--space-xl) * -1);
      inset-inline-start: 0;
      translate: 0 -50%;
    }
  }

  /* ==========================================================================
     11. CTA BAND & NEWSLETTER
     ========================================================================== */

  .cta-band {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-4xl) var(--space-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: radial-gradient(
        ellipse 60% 100% at 50% 100%,
        var(--color-accent-faint),
        transparent 70%
      ),
      var(--color-bg-surface);
    text-align: center;
    overflow: hidden;
  }

  .cta-band__title {
    font-size: var(--text-3xl);
    max-inline-size: 22ch;
  }

  .cta-band__text {
    color: var(--color-text-muted);
    max-inline-size: 48ch;
  }

  .newsletter {
    inline-size: min(100%, 28rem);
  }

  .newsletter__consent {
    margin-block-start: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    text-align: start;
  }

  /* ==========================================================================
     12. DOCUMENTATION LAYOUT
     ========================================================================== */

  .docs-layout {
    display: grid;
    gap: var(--space-2xl);
    grid-template-columns: 1fr;
    padding-block: var(--section-gap-sm);
  }

  .docs-sidebar,
  .docs-aside {
    display: none;
  }

  .docs-nav__group + .docs-nav__group {
    margin-block-start: var(--space-lg);
  }

  .docs-nav__title {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-widest);
    text-transform: uppercase;
    color: var(--color-text-faint);
    margin-block-end: var(--space-sm);
  }

  .docs-nav__list {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    list-style: none;
    margin: 0;
    padding: 0;
    border-inline-start: 1px solid var(--color-border);
  }

  .docs-nav__link {
    display: block;
    padding: 0.35rem var(--space-md);
    margin-inline-start: -1px;
    border-inline-start: 1px solid transparent;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out),
      border-color var(--duration-fast) var(--ease-out);
  }

  .docs-nav__link:hover {
    color: var(--color-text);
  }

  .docs-nav__link.is-active,
  .docs-nav__link[aria-current="page"] {
    color: var(--color-accent);
    border-inline-start-color: var(--color-accent);
  }

  .docs-content {
    min-inline-size: 0;
  }

  @media (width >= 64rem) {
    .docs-layout {
      grid-template-columns: 15rem minmax(0, 1fr);
      gap: var(--space-3xl);
    }

    .docs-sidebar {
      display: block;
      position: sticky;
      inset-block-start: calc(var(--header-height) + var(--space-lg));
      align-self: start;
      max-block-size: calc(100svh - var(--header-height) - var(--space-2xl));
      overflow-y: auto;
      scrollbar-width: thin;
    }
  }

  @media (width >= 82rem) {
    .docs-layout {
      grid-template-columns: 15rem minmax(0, 1fr) 13rem;
    }

    .docs-aside {
      display: block;
      position: sticky;
      inset-block-start: calc(var(--header-height) + var(--space-lg));
      align-self: start;
    }
  }

  /* ==========================================================================
     13. LABS — terminal aesthetic
     ========================================================================== */

  .terminal {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: #0a0a0a;
    overflow: hidden;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
  }

  .terminal__bar {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-block-end: 1px solid var(--color-border);
    background-color: var(--color-bg-surface);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
  }

  .terminal__dot {
    inline-size: 0.6rem;
    block-size: 0.6rem;
    border-radius: var(--radius-full);
    background-color: var(--color-border-strong);
  }

  .terminal__body {
    padding: var(--space-lg);
    line-height: var(--leading-relaxed);
    overflow-x: auto;
  }

  .terminal__line {
    display: block;
    white-space: pre;
    color: var(--color-text-muted);
  }

  .terminal__line--cmd {
    color: var(--color-text);
  }

  .terminal__line--cmd::before {
    content: "$ ";
    color: var(--color-accent);
  }

  .terminal__line--ok {
    color: var(--color-success);
  }

  .terminal__cursor {
    display: inline-block;
    inline-size: 0.5rem;
    block-size: 1em;
    translate: 0 0.15em;
    background-color: var(--color-accent);
    animation: rcx-blink 1.1s steps(2, start) infinite;
  }

  @keyframes rcx-blink {
    50% {
      opacity: 0;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .terminal__cursor {
      animation: none;
    }
  }

  /* ==========================================================================
     14. CAREERS
     ========================================================================== */

  .openings {
    border-block-start: 1px solid var(--color-border);
  }

  .opening {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding-block: var(--space-lg);
    border-block-end: 1px solid var(--color-border);
    transition: padding-inline var(--duration-base) var(--ease-out);
  }

  .opening:hover {
    padding-inline: var(--space-sm);
  }

  .opening__title {
    font-family: var(--font-display);
    font-size: var(--text-md);
    font-weight: var(--weight-medium);
  }

  .opening__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
  }

  .opening__link::after {
    content: "";
    position: absolute;
    inset: 0;
  }

  /* ==========================================================================
     15. CONTACT
     ========================================================================== */

  .contact-layout {
    display: grid;
    gap: var(--space-3xl);
    grid-template-columns: 1fr;
    align-items: start;
  }

  @media (width >= 62rem) {
    .contact-layout {
      grid-template-columns: 1fr 1.15fr;
      gap: var(--space-4xl);
    }
  }

  .contact-channel {
    display: flex;
    gap: var(--space-md);
    padding-block: var(--space-lg);
    border-block-end: 1px solid var(--color-border);
  }

  .contact-channel:last-child {
    border-block-end: 0;
  }

  .contact-channel__title {
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    margin-block-end: 0.15rem;
  }

  .contact-channel__text {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
  }

  /* ==========================================================================
     16. ACADEMY
     ========================================================================== */

  .course-card__level {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--color-accent);
  }

  .course-card__modules {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
  }

  .progress {
    inline-size: 100%;
    block-size: 3px;
    border-radius: var(--radius-full);
    background-color: var(--color-border);
    overflow: hidden;
  }

  .progress__bar {
    display: block;
    block-size: 100%;
    border-radius: inherit;
    background-color: var(--color-accent);
    inline-size: var(--progress, 0%);
    transition: inline-size var(--duration-slower) var(--ease-out);
  }

  /* ==========================================================================
     17. LEGAL & 404
     ========================================================================== */

  .legal {
    padding-block: var(--section-gap-sm) var(--section-gap);
  }

  .legal__updated {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-faint);
    margin-block-end: var(--space-2xl);
  }

  .error-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    min-block-size: 100svh;
    padding-block: calc(var(--header-height) + var(--space-3xl));
    text-align: center;
  }

  .error-page__code {
    font-family: var(--font-mono);
    font-size: clamp(4rem, 2rem + 9vw, 9rem);
    font-weight: var(--weight-bold);
    line-height: var(--leading-none);
    letter-spacing: var(--tracking-tighter);
    color: transparent;
    -webkit-text-stroke: 1px var(--color-border-strong);
  }

  .error-page__title {
    font-size: var(--text-2xl);
  }

  .error-page__text {
    color: var(--color-text-muted);
    max-inline-size: 40ch;
  }
}