/* ============================================================================
   Thème partagé par le site principal et le sous-site consulting IA.
   Palette claire ; le moteur (scrub-engine.js) lit ces variables.
   ========================================================================== */

/* ---- thème clair ------------------------------------------------------- */
:root, .sw-root {
  --sw-bg: #F5F2ED;            /* == le fond des scènes générées */
  --sw-ink: #1A1A1E;
  --sw-ink-soft: rgba(26,26,30,.58);
  --sw-accent: #2E6BFF;
  --sw-font-display: 'Space Grotesk', system-ui, sans-serif;
  --sw-font-body: 'Space Grotesk', system-ui, sans-serif;
  --cw-border: rgba(26,26,30,.12);
  --cw-surface: rgba(255,255,255,.62);
}
html, body { margin: 0; background: var(--sw-bg); }
::selection { background: var(--sw-ink); color: var(--sw-bg); }

/* Le glyphe [ø] à la place de la pastille par défaut du moteur. */
.sw-brand__mark {
  width: auto; height: auto; background: none; box-shadow: none;
  border-radius: 0; font-family: var(--sw-font-display); font-weight: 700;
  font-size: 1.1rem; color: var(--sw-ink);
}
.sw-brand__mark::before { content: '[ø]'; }

/* Le scrim du moteur est une colonne à gauche ; les scènes `wide` posent le leur,
   pleine largeur et par le bas, sinon le texte se perd sur les dioramas clairs. */
.sw-copy--wide::before {
  content: ''; position: absolute; z-index: -1; pointer-events: none;
  left: -8vw; right: -8vw; top: -8vh; bottom: -16vh;
  background: linear-gradient(0deg,
    var(--sw-bg) 18%,
    color-mix(in srgb, var(--sw-bg) 72%, transparent) 58%,
    transparent 100%);
}

/* Le parcours IA pose sa copy sur un panneau autonome : le texte reste lisible
   sans voiler toute la moitié gauche du décor. */
.cw-long .sw-copy {
  padding: clamp(22px, 2.4vw, 32px);
  border-radius: 20px;
  background: color-mix(in srgb, var(--sw-bg) 58%, transparent);
  backdrop-filter: blur(22px) saturate(1.1);
  border: 1px solid color-mix(in srgb, #fff 45%, transparent);
  box-shadow: 0 18px 50px rgba(26,26,30,.10);
}
.cw-long .sw-copylayer::before { display: none; }

/* La seconde accroche garde "Ou en employer une." sur une ligne : sa carte
   suit cette largeur au lieu de laisser le titre dépasser du verre. */
@media (min-width: 861px) {
  .cw-long .sw-copy:nth-child(2) {
    width: min(50vw, 540px);
  }
  .cw-long .sw-copy:nth-child(2) .sw-copy__body {
    max-width: 48ch;
  }
}

/* Essai scène 1 : une accroche-manifeste sur une ligne, dans une carte ajustée
   à la largeur du titre plutôt qu'un bandeau plein écran. */
@media (min-width: 980px) {
  .cw-long .sw-copy:first-child {
    left: clamp(18px, 5vw, 64px);
    right: auto;
    top: auto;
    bottom: clamp(100px, 13vh, 130px);
    width: max-content;
    max-width: calc(100vw - clamp(36px, 10vw, 128px));
    transform: translateY(var(--sw-shift, 0px));
    display: grid;
    grid-template-columns: max-content 1fr;
    column-gap: 18px;
    align-items: baseline;
    padding: clamp(22px, 2.2vw, 30px) clamp(24px, 2.8vw, 40px);
    background: color-mix(in srgb, var(--sw-bg) 62%, transparent);
    backdrop-filter: blur(20px) saturate(1.08);
    border: 1px solid color-mix(in srgb, #fff 42%, transparent);
    border-radius: 18px;
    box-shadow: 0 14px 38px rgba(26,26,30,.09);
  }
  .cw-long .sw-copy:first-child .sw-copy__eyebrow {
    margin-top: 0;
  }
  .cw-long .sw-copy:first-child .sw-copy__title {
    grid-column: 1 / -1;
    width: max-content;
    max-width: 100%;
    white-space: nowrap;
    font-size: clamp(2.65rem, 4.35vw, 4rem);
    letter-spacing: -.035em;
  }
  .cw-long .sw-copy:first-child .sw-copy__body {
    grid-column: 1 / -1;
    justify-self: start;
    max-width: 58ch;
    margin-top: 16px;
    text-align: left;
  }
}

/* ---- blocs `extra` (world.config.js) ---------------------------------- */
.cw-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.cw-card {
  padding: 18px 20px; border-radius: 16px;
  background: var(--cw-surface);
  border: 1px solid var(--cw-border);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 30px rgba(26,26,30,.07);
}
.cw-card__n { font-family: 'JetBrains Mono', monospace; font-size: .72rem; color: var(--sw-accent); letter-spacing: .1em; }
.cw-card__t { font-family: var(--sw-font-display); font-size: 1.02rem; margin: 8px 0 6px; color: var(--sw-ink); }
.cw-card__d { margin: 0; font-size: .86rem; line-height: 1.5; color: var(--sw-ink-soft); }

.cw-marquee { position: relative; display: flex; gap: 28px; margin-top: 16px; overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.cw-marquee ul { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; flex: 0 0 auto;
  animation: cw-slide 30s linear infinite; }
.cw-marquee li { font-family: 'JetBrains Mono', monospace; font-size: .78rem; color: var(--sw-ink-soft); white-space: nowrap; }
@keyframes cw-slide { to { transform: translateX(calc(-100% - 28px)); } }

.cw-projects { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.cw-project { display: block; text-decoration: none; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--cw-border); background: var(--cw-surface);
  backdrop-filter: blur(16px); box-shadow: 0 8px 30px rgba(26,26,30,.07);
  transition: transform .25s, border-color .25s, box-shadow .25s; }
.cw-project:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--sw-accent) 45%, transparent);
  box-shadow: 0 14px 40px rgba(26,26,30,.13); }
.cw-project--off { opacity: .55; }
.cw-project img { display: block; width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.cw-project__lock { display: block; width: 100%; aspect-ratio: 16/10;
  background: repeating-linear-gradient(45deg, rgba(26,26,30,.07) 0 8px, transparent 8px 16px); }
.cw-project__meta { display: block; padding: 10px 12px 12px; }
.cw-project__meta b { display: block; font-size: .84rem; color: var(--sw-ink); }
.cw-project__meta i { display: inline-block; margin-top: 5px; font-style: normal;
  font-family: 'JetBrains Mono', monospace; font-size: .64rem; letter-spacing: .08em; text-transform: uppercase;
  color: var(--sw-accent); border: 1px solid color-mix(in srgb, var(--sw-accent) 35%, transparent);
  padding: 2px 7px; border-radius: 999px; }
.cw-project__meta em { display: block; margin-top: 7px; font-style: normal; font-size: .7rem;
  font-family: 'JetBrains Mono', monospace; color: var(--sw-ink-soft); }

.cw-blocks { display: grid; gap: 14px; }
.sw-copy--wide .cw-blocks { grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cw-block { border-left: 1px solid color-mix(in srgb, var(--sw-accent) 40%, transparent); padding-left: 14px; }
.cw-block h3 { margin: 0 0 5px; font-family: var(--sw-font-display); font-size: .95rem; color: var(--sw-ink); }
.cw-block p { margin: 0; font-size: .84rem; line-height: 1.5; color: var(--sw-ink-soft); }

.cw-faq { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: start; }
.cw-faq details { border: 1px solid var(--cw-border); border-radius: 14px; padding: 14px 16px;
  background: var(--cw-surface); backdrop-filter: blur(16px);
  box-shadow: 0 8px 30px rgba(26,26,30,.07); }
.cw-faq summary { cursor: pointer; list-style: none; font-family: var(--sw-font-display);
  font-size: .9rem; color: var(--sw-ink); }
.cw-faq summary::-webkit-details-marker { display: none; }
.cw-faq summary::after { content: '+'; float: right; color: var(--sw-accent); }
.cw-faq details[open] summary::after { content: '–'; }
.cw-faq p { margin: 10px 0 0; font-size: .82rem; line-height: 1.55; color: var(--sw-ink-soft); }

@media (max-width: 860px) {
  /* Le libellé du hint tombe sur les CTA du héros ; l'icône suffit. */
  .sw-hint span { display: none; }
  .cw-cards, .cw-projects, .cw-faq { grid-template-columns: 1fr; }
  .cw-projects { grid-auto-flow: column; grid-auto-columns: 62vw; grid-template-columns: none;
    overflow-x: auto; padding-bottom: 6px; scroll-snap-type: x mandatory; }
  .cw-project { scroll-snap-align: start; }
  .cw-cards { grid-auto-flow: column; grid-auto-columns: 74vw; overflow-x: auto; padding-bottom: 6px; }
  .cw-faq details:not([open]) p { display: none; }
}
@media (prefers-reduced-motion: reduce) { .cw-marquee ul { animation: none; } }

/* Lien croisé entre le site principal et le sous-site consulting IA. */
.cw-crosslink { margin: 18px 0 0; font-size: .86rem; color: var(--sw-ink-soft); }
.cw-crosslink a { color: var(--sw-accent); text-decoration: none; border-bottom: 1px solid currentColor; }
.cw-crosslink a:hover { opacity: .75; }

/* ---- blocs denses du sous-site consulting IA ------------------------------ */
/* Ces scènes portent beaucoup plus de contenu : le panneau `wide` remonte,
   les cartes se resserrent, et une bande compacte accueille les listes. */
.cw-cards--4 { grid-template-columns: repeat(4, 1fr); gap: 12px; }
.cw-cards--3 { grid-template-columns: repeat(3, 1fr); }
.cw-cards--4 .cw-card { padding: 14px 16px; }
.cw-cards--4 .cw-card__t { font-size: .95rem; margin: 6px 0 5px; }
.cw-cards--4 .cw-card__d { font-size: .8rem; line-height: 1.45; }

/* Bandeau de métiers concernés, au-dessus des cartes. */
.cw-pills { display: flex; flex-wrap: wrap; gap: 7px; list-style: none; margin: 0 0 16px; padding: 0; }
.cw-pills li {
  font-size: .74rem; font-weight: 500; letter-spacing: .01em;
  color: var(--sw-ink-soft); background: var(--cw-surface);
  border: 1px solid var(--cw-border); border-radius: 999px; padding: 5px 12px;
}

/* Liste compacte en une ligne : livrables, cas d'usage, points de conformité. */
.cw-strip {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px;
  margin: 14px 0 0; font-size: .78rem; line-height: 1.5; color: var(--sw-ink-soft);
}
.cw-strip b {
  font-family: 'JetBrains Mono', monospace; font-size: .68rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--sw-accent); font-weight: 500;
}
.cw-strip span { position: relative; padding-left: 14px; }
.cw-strip span::before {
  content: ''; position: absolute; left: 0; top: .55em; width: 5px; height: 5px;
  border-radius: 50%; background: color-mix(in srgb, var(--sw-accent) 55%, transparent);
}

/* Six questions au lieu de trois : deux rangées de trois, plus serrées. */
.cw-faq--dense { grid-template-columns: repeat(3, 1fr); gap: 10px; }
.cw-faq--dense details { padding: 11px 14px; }
.cw-faq--dense summary { font-size: .84rem; }
.cw-faq--dense p { font-size: .78rem; margin-top: 8px; }

/* Les scènes denses ont besoin de plus de titre et moins de vide. */
.sw-copy--wide .sw-copy__title { font-size: clamp(1.6rem, 3vw, 2.5rem); }
.sw-copy--wide .sw-copy__body { font-size: clamp(.92rem, 1.05vw, 1.02rem); margin-top: 12px; }

@media (max-width: 1100px) {
  .cw-cards--4 { grid-template-columns: repeat(2, 1fr); }
  .cw-faq--dense { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .cw-cards--4, .cw-cards--3, .cw-faq--dense { grid-template-columns: none; }
  .cw-pills { gap: 6px; }
  .cw-pills li:nth-child(n+6) { display: none; }
  .cw-strip span:nth-child(n+5) { display: none; }
}

/* ---- tableau « avant / après » (sous-site IA, scène de la bascule) --------- */
.cw-compare { border: 1px solid var(--cw-border); border-radius: 14px; overflow: hidden;
  background: var(--cw-surface); backdrop-filter: blur(16px);
  box-shadow: 0 8px 30px rgba(26,26,30,.07); }
.cw-compare__head, .cw-compare__row { display: grid; grid-template-columns: 1fr 1fr; }
.cw-compare__head { font-family: 'JetBrains Mono', monospace; font-size: .66rem;
  letter-spacing: .1em; text-transform: uppercase; }
.cw-compare__head span { padding: 9px 16px; }
.cw-compare__head span:first-child { color: var(--sw-ink-soft); }
.cw-compare__head span:last-child { color: var(--sw-accent);
  background: color-mix(in srgb, var(--sw-accent) 8%, transparent); }
.cw-compare__row { border-top: 1px solid var(--cw-border); font-size: .82rem; line-height: 1.45; }
.cw-compare__row span { padding: 9px 16px; }
.cw-compare__row span:first-child { color: var(--sw-ink-soft); }
.cw-compare__row span:last-child { color: var(--sw-ink);
  background: color-mix(in srgb, var(--sw-accent) 5%, transparent);
  border-left: 1px solid var(--cw-border); }

/* ---- encart de règle citée ------------------------------------------------- */
.cw-rule { margin: 14px 0 0; padding: 11px 16px; font-size: .81rem; line-height: 1.5;
  color: var(--sw-ink-soft); background: color-mix(in srgb, var(--sw-accent) 6%, transparent);
  border-left: 2px solid var(--sw-accent); border-radius: 0 10px 10px 0; }
.cw-rule b { color: var(--sw-ink); font-weight: 600; }
.cw-rule em { font-style: italic; color: var(--sw-ink); }

/* Les scènes qui empilent deux grilles de cartes respirent moins. */
.sw-copy--wide .cw-cards + .cw-cards { margin-top: 12px; }

@media (max-width: 860px) {
  .cw-compare__head, .cw-compare__row { grid-template-columns: 1fr; }
  .cw-compare__row span:last-child { border-left: 0; border-top: 1px solid var(--cw-border); }
}

/* ---- scènes denses : deux grilles empilées dans une seule hauteur d'écran --- */
.sw-copy--dense .sw-copy__title { font-size: clamp(1.4rem, 2.4vw, 2rem); }
.sw-copy--dense .sw-copy__body { font-size: .88rem; margin-top: 10px; max-width: 90ch; }
.sw-copy--dense .cw-card { padding: 11px 13px; }
.sw-copy--dense .cw-card__t { font-size: .88rem; margin: 5px 0 4px; }
.sw-copy--dense .cw-card__d { font-size: .75rem; line-height: 1.4; }
.sw-copy--dense .cw-cards { gap: 9px; }
.sw-copy--dense .cw-cards + .cw-cards { margin-top: 9px; }
.sw-copy--dense .cw-rule { margin-top: 9px; padding: 8px 13px; font-size: .75rem; }
.sw-copy--dense .cw-strip { margin-top: 9px; font-size: .73rem; }
.sw-copy--dense .cw-copy__extra, .sw-copy--dense .cw-faq--dense { gap: 8px; }
.sw-copy--dense .cw-faq--dense details { padding: 9px 12px; }
.sw-copy--dense .cw-faq--dense summary { font-size: .8rem; }
.sw-copy--dense .cw-faq--dense p { font-size: .74rem; margin-top: 6px; }

/* ---- chrome : beaucoup de sections, le nav doit rester sur une ligne -------
   Scopé à `.cw-long` (posé sur le conteneur du sous-site IA, 10 sections) :
   le site principal n'a que 6 entrées et garde le nav par défaut. */
.cw-long .sw-brand__name { white-space: nowrap; font-size: 1rem; }
.cw-long .sw-nav { padding: 4px; gap: 2px; }
.cw-long .sw-nav__item { font-size: .74rem; padding: 6px 9px; white-space: nowrap; }
@media (max-width: 1500px) { .cw-long .sw-nav__item { font-size: .7rem; padding: 6px 7px; } }
@media (max-width: 1280px) { .cw-long .sw-nav { display: none; } }  /* le rail suffit */

/* Sur une scène dense, le scrim par défaut monte si haut qu'il efface le
   diorama. On le raccourcit et on l'allège : le texte reste lisible grâce
   aux cartes, qui portent déjà leur propre fond. */
.sw-copy--dense::before {
  top: 0; bottom: -12vh;
  background: linear-gradient(0deg,
    color-mix(in srgb, var(--sw-bg) 62%, transparent) 18%,
    color-mix(in srgb, var(--sw-bg) 22%, transparent) 55%,
    transparent 88%);
}
/* Sur une scène dense, le titre et le chapô n'ont plus de scrim sous eux :
   ils portent leur propre halo pour rester lisibles sur le diorama. */
.sw-copy--dense .sw-copy__title,
.sw-copy--dense .sw-copy__eyebrow,
.sw-copy--dense .sw-copy__num {
  text-shadow: 0 1px 14px var(--sw-bg), 0 0 28px var(--sw-bg);
}
.sw-copy--dense .sw-copy__body {
  text-shadow: 0 1px 10px var(--sw-bg), 0 0 20px var(--sw-bg);
}
/* Les cartes d'une grille dense doivent contenir leur texte, quelle que soit
   la longueur de la plus bavarde. */
.cw-cards { align-items: stretch; }
.cw-card { display: flex; flex-direction: column; overflow: hidden; }
.cw-card__d { overflow-wrap: anywhere; }

/* ============================================================================
   Pages classiques — la suite du parcours immersif.
   Le scroll world s'arrête, ces sections prennent le relais : fond neutre,
   pleine largeur, contenu dense assumé. Utilisées par ia/index.html.
   ========================================================================== */
.cw-pages { position: relative; z-index: 30; background: var(--sw-bg);
  font-family: var(--sw-font-body); color: var(--sw-ink); }
.cw-page { max-width: 1180px; margin: 0 auto; padding: clamp(64px, 9vw, 130px) clamp(20px, 5vw, 56px); }
.cw-page--alt { max-width: none; background: color-mix(in srgb, var(--sw-ink) 4%, var(--sw-bg)); }
.cw-page--alt > * { max-width: 1180px; margin-left: auto; margin-right: auto; }

.cw-page__head { max-width: 780px; margin-bottom: clamp(32px, 4vw, 52px); }
.cw-page__eyebrow { font-family: 'JetBrains Mono', monospace; font-size: .72rem;
  letter-spacing: .14em; text-transform: uppercase; color: var(--sw-accent); }
.cw-page__title { font-family: var(--sw-font-display); font-weight: 700;
  font-size: clamp(1.8rem, 3.6vw, 2.9rem); line-height: 1.1; letter-spacing: -.015em;
  margin: 14px 0 0; }
.cw-page__lead { font-size: clamp(1rem, 1.2vw, 1.1rem); line-height: 1.6;
  color: var(--sw-ink-soft); margin: 16px 0 0; max-width: 68ch; }
.cw-sub { font-family: var(--sw-font-display); font-size: 1.15rem; margin: clamp(40px,5vw,64px) 0 4px; }

.cw-grid { display: grid; gap: 18px; margin-top: 22px; }
.cw-grid--4 { grid-template-columns: repeat(4, 1fr); }
.cw-grid--3 { grid-template-columns: repeat(3, 1fr); }
.cw-grid--2 { grid-template-columns: repeat(2, 1fr); }

.cw-block { padding: 22px 24px; border: 1px solid var(--cw-border); border-radius: 16px;
  background: color-mix(in srgb, #fff 55%, transparent); }
.cw-block__n { font-family: 'JetBrains Mono', monospace; font-size: .7rem;
  letter-spacing: .1em; color: var(--sw-accent); text-transform: uppercase; }
.cw-block h3 { font-family: var(--sw-font-display); font-size: 1rem; margin: 8px 0 7px; }
.cw-block p { margin: 0; font-size: .88rem; line-height: 1.55; color: var(--sw-ink-soft); }

.cw-callout { margin: 26px 0 0; padding: 20px 24px; border-radius: 16px;
  background: color-mix(in srgb, var(--sw-accent) 7%, transparent);
  border-left: 3px solid var(--sw-accent);
  font-size: .95rem; line-height: 1.6; color: var(--sw-ink); }
.cw-callout b { display: block; font-family: var(--sw-font-display); margin-bottom: 5px; }
.cw-callout em { font-style: italic; font-weight: 600; }

.cw-note { margin: 26px 0 0; font-size: .82rem; line-height: 1.6;
  color: var(--sw-ink-soft); max-width: 82ch; padding-top: 18px;
  border-top: 1px solid var(--cw-border); }

.cw-steps { list-style: none; margin: 26px 0 0; padding: 0; display: grid; gap: 2px; }
.cw-steps li { display: grid; grid-template-columns: 84px 1fr; gap: 20px; align-items: start;
  padding: 22px 0; border-top: 1px solid var(--cw-border); }
.cw-steps li:last-child { border-bottom: 1px solid var(--cw-border); }
.cw-steps__n { font-family: 'JetBrains Mono', monospace; font-size: 1.5rem;
  color: color-mix(in srgb, var(--sw-accent) 40%, transparent); line-height: 1; }
.cw-steps h3 { font-family: var(--sw-font-display); font-size: 1.05rem; margin: 0 0 6px; }
.cw-steps p { margin: 0; font-size: .9rem; line-height: 1.6; color: var(--sw-ink-soft); max-width: 72ch; }

.cw-grid--2 details { padding: 18px 22px; border: 1px solid var(--cw-border);
  border-radius: 16px; background: color-mix(in srgb, #fff 55%, transparent); align-self: start; }
.cw-grid--2 summary { cursor: pointer; list-style: none; font-family: var(--sw-font-display);
  font-size: .98rem; }
.cw-grid--2 summary::-webkit-details-marker { display: none; }
.cw-grid--2 summary::after { content: '+'; float: right; color: var(--sw-accent); font-weight: 700; }
.cw-grid--2 details[open] summary::after { content: '–'; }
.cw-grid--2 details p { margin: 12px 0 0; font-size: .88rem; line-height: 1.6; color: var(--sw-ink-soft); }

.cw-final { margin-top: clamp(48px, 6vw, 80px); padding-top: clamp(40px, 5vw, 60px);
  border-top: 1px solid var(--cw-border); text-align: center; }
.cw-final__line { font-family: var(--sw-font-display);
  font-size: clamp(1.2rem, 2.2vw, 1.7rem); line-height: 1.35; margin: 0 auto; max-width: 26ch; }
.cw-final__cta { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.cw-btn { text-decoration: none; font-weight: 600; font-size: .95rem; padding: 14px 26px;
  border-radius: 999px; border: 1.5px solid color-mix(in srgb, var(--sw-ink) 22%, transparent);
  color: var(--sw-ink); transition: transform .2s; }
.cw-btn--primary { background: var(--sw-ink); color: var(--sw-bg); border-color: var(--sw-ink); }
.cw-btn:hover { transform: translateY(-2px); }
.cw-final__alt { margin-top: 26px; font-size: .85rem; color: var(--sw-ink-soft); }
.cw-final__alt a { color: var(--sw-accent); text-decoration: none; border-bottom: 1px solid currentColor; }

@media (max-width: 1000px) {
  .cw-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .cw-grid--4, .cw-grid--3, .cw-grid--2 { grid-template-columns: 1fr; }
  .cw-steps li { grid-template-columns: 1fr; gap: 8px; }
  .cw-steps__n { font-size: 1.1rem; }
}

/* La barre du haut est fixe et sans fond : sur les pages classiques, le texte
   défilait dessous. Un dégradé depuis le fond suffit — invisible sur le
   parcours immersif, lisible sur les sections. */
.sw-topbar::before {
  content: ''; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(180deg, var(--sw-bg) 45%,
              color-mix(in srgb, var(--sw-bg) 70%, transparent) 75%, transparent 100%);
}