/* =========================================================================
   Quentin Pignolet — landing services (dev web & automatisation)
   Ambiance inspirée de sunmetalon.com, identité propre.
   ========================================================================= */

:root {
  /* Couleurs */
  --ground: #12100e;          /* fond principal, graphite chaud */
  --ground-raised: #1b1815;   /* panneaux, lignes d'accordéon */
  --ground-deep: #0c0b0a;     /* bandes pleine largeur */
  --bone: #ece7df;            /* texte principal sur fond sombre */
  --bone-2: #e4dfd4;          /* fond de la section claire */
  --ink: #171310;             /* texte sur fond clair */
  --halo: #ff5e33;            /* accent molten — marques structurelles uniquement */
  --halo-ink: #c8471c;        /* variante accent lisible sur fond clair */
  --muted: #9a9186;           /* texte secondaire sur fond sombre */
  --muted-ink: #6a6157;       /* texte secondaire sur fond clair */
  --hairline: rgba(236, 231, 223, 0.14);
  --hairline-ink: rgba(23, 19, 16, 0.16);

  /* Typo */
  --font-display: "Bricolage Grotesque", "Trebuchet MS", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* Mesures */
  --wrap: 1280px;
  --gutter: 3rem;
  --radius-pill: 999px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  background: var(--ground);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: clamp(1.0625rem, 1.01rem + 0.28vw, 1.1875rem);
  font-weight: 400;
  overflow-x: hidden;
}

::selection {
  background: var(--halo);
  color: var(--ground);
}

/* --------------------------------------------------------------------- */
/* Utilitaires de mise en page                                          */
/* --------------------------------------------------------------------- */

.wrap {
  width: min(100% - (var(--gutter) * 2), var(--wrap));
  margin-inline: auto;
}

.section {
  padding-block: clamp(4.5rem, 3.5rem + 7vw, 9.5rem);
  position: relative;
}

.section--light {
  background: var(--bone-2);
  color: var(--ink);
}

.section--deep {
  background: var(--ground-deep);
}

.section-head {
  display: grid;
  gap: 1.25rem;
  margin-bottom: clamp(2.5rem, 1.5rem + 4vw, 5rem);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.eyebrow::before {
  content: "";
  width: 1.75rem;
  height: 2px;
  background: var(--halo);
  flex: none;
}

.section--light .eyebrow {
  color: var(--muted-ink);
}

.section--light .eyebrow::before {
  background: var(--halo-ink);
}

.section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 1.3rem + 3.4vw, 3.9rem);
  letter-spacing: -0.03em;
  line-height: 1.02;
  max-width: 20ch;
}

.lede {
  font-size: clamp(1.15rem, 1rem + 0.8vw, 1.5rem);
  line-height: 1.5;
  color: var(--bone);
  max-width: 46ch;
}

.section--light .lede {
  color: var(--ink);
}

/* Boutons -------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: transform 0.25s var(--ease), background-color 0.25s var(--ease),
    color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.btn--solid {
  background: var(--bone);
  color: var(--ground);
}

.btn--solid:hover {
  background: #fff;
  transform: translateY(-2px);
}

.btn--ghost {
  border: 1px solid var(--hairline);
  color: var(--bone);
}

.btn--ghost:hover {
  border-color: var(--bone);
  transform: translateY(-2px);
}

.section--light .btn--ghost {
  border-color: var(--hairline-ink);
  color: var(--ink);
}

.section--light .btn--ghost:hover {
  border-color: var(--ink);
}

.btn__arrow {
  transition: transform 0.25s var(--ease);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* Lien fléché texte -------------------------------------------------- */

.arrow-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--halo);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.25s var(--ease), gap 0.25s var(--ease);
}

.arrow-link:hover {
  border-color: var(--halo);
  gap: 0.8rem;
}

.section--light .arrow-link {
  color: var(--halo-ink);
}

.section--light .arrow-link:hover {
  border-color: var(--halo-ink);
}

/* Mot fantôme (décor) ---------------------------------------------- */

.ghost-word {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.05em;
  line-height: 0.78;
  font-size: clamp(5rem, 2rem + 26vw, 21rem);
  color: rgba(236, 231, 223, 0.045);
  -webkit-text-stroke: 1px rgba(236, 231, 223, 0.13);
  text-stroke: 1px rgba(236, 231, 223, 0.13);
  text-transform: uppercase;
  user-select: none;
  pointer-events: none;
  white-space: nowrap;
}

/* --------------------------------------------------------------------- */
/* En-tête                                                              */
/* --------------------------------------------------------------------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding-block: 1.15rem;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease),
    padding 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(18, 16, 14, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--hairline);
  padding-block: 0.8rem;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  white-space: nowrap;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.brand__name span {
  color: var(--halo);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 520px) {
  .brand__tag {
    display: none;
  }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav__links {
  display: flex;
  gap: 1.75rem;
}

.site-nav__links a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 0.2s var(--ease);
}

.site-nav__links a:hover {
  color: var(--bone);
}

.nav-toggle {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bone);
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
}

/* --------------------------------------------------------------------- */
/* Hero                                                                 */
/* --------------------------------------------------------------------- */

.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 7rem;
  padding-bottom: 3rem;
  position: relative;
  overflow: hidden;
}

.hero__kickers {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: clamp(0.7rem, 0.62rem + 0.3vw, 0.85rem);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: clamp(1.5rem, 5vh, 4rem);
}

.hero__kickers span {
  display: inline-flex;
  flex-direction: column;
  gap: 0.6rem;
}

.hero__kickers span::after {
  content: "";
  height: 2px;
  width: 2.5rem;
  background: var(--halo);
}

.hero__kickers span:last-child {
  text-align: right;
  align-items: flex-end;
}

.hero__stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  isolation: isolate;
  min-height: clamp(22rem, 54vh, 40rem);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.4rem, 1rem + 7.6vw, 6.75rem);
  letter-spacing: -0.035em;
  line-height: 0.98;
  text-align: center;
  position: relative;
  z-index: 2;
  text-wrap: balance;
  text-shadow: 0 0 60px rgba(18, 16, 14, 0.55);
}

.hero__sub {
  position: relative;
  z-index: 3;
  margin-top: clamp(1.5rem, 4vh, 3rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem 2.5rem;
  max-width: 62ch;
}

.hero__sub p {
  font-size: clamp(1rem, 0.92rem + 0.4vw, 1.2rem);
  color: var(--muted);
  max-width: 44ch;
}

.hero__scroll {
  position: absolute;
  left: 0;
  bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.hero__scroll::before {
  content: "";
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(var(--halo), transparent);
  animation: scrollpulse 2.4s var(--ease) infinite;
}

@keyframes scrollpulse {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.6);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
    transform-origin: top;
  }
}

/* L'orbe — élément signature -------------------------------------- */

.orbe {
  position: absolute;
  z-index: 1;
  width: clamp(17rem, 48vw, 37rem);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(236, 231, 223, 0.07);
  background:
    /* reflet spéculaire */
    radial-gradient(
      circle at 35% 28%,
      rgba(255, 255, 255, 0.85),
      rgba(255, 255, 255, 0) 11%
    ),
    /* halo spéculaire diffus */
    radial-gradient(
      circle at 37% 31%,
      rgba(255, 244, 236, 0.28),
      rgba(255, 244, 236, 0) 34%
    ),
    /* corps métallique */
    radial-gradient(
      circle at 47% 42%,
      #514840 0%,
      #2c2622 34%,
      #191512 62%,
      #100d0b 82%,
      #0b0908 100%
    ),
    #0b0908;
  box-shadow: inset -20px -26px 70px rgba(0, 0, 0, 0.72),
    inset 24px 22px 60px rgba(255, 255, 255, 0.05),
    0 0 130px -8px rgba(255, 94, 51, 0.42);
}

/* bandes métalliques en rotation, détourées par le cercle */
.orbe::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    rgba(255, 255, 255, 0) 0deg,
    rgba(255, 255, 255, 0.09) 60deg,
    rgba(255, 255, 255, 0) 130deg,
    rgba(255, 94, 51, 0.14) 190deg,
    rgba(255, 94, 51, 0) 260deg,
    rgba(255, 255, 255, 0.06) 320deg,
    rgba(255, 255, 255, 0) 360deg
  );
  mix-blend-mode: screen;
  animation: spin 42s linear infinite;
  -webkit-mask: radial-gradient(circle, transparent 22%, #000 60%);
  mask: radial-gradient(circle, transparent 22%, #000 60%);
}

/* liseré molten en bas-droite + ceinture d'ombre pour lisibilité du titre */
.orbe::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 50%;
  background: radial-gradient(
      circle at 70% 76%,
      rgba(255, 94, 51, 0.6),
      rgba(255, 94, 51, 0) 26%
    ),
    linear-gradient(
      180deg,
      transparent 24%,
      rgba(11, 9, 8, 0.5) 50%,
      transparent 76%
    );
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --------------------------------------------------------------------- */
/* Constat (paragraphe manifeste)                                       */
/* --------------------------------------------------------------------- */

.statement .eyebrow {
  margin-bottom: clamp(2rem, 1rem + 3vw, 3.5rem);
}

.statement__grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(2rem, 1rem + 5vw, 6rem);
  align-items: start;
}

.statement__text {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.55rem, 0.9rem + 2.8vw, 3.15rem);
  letter-spacing: -0.02em;
  line-height: 1.16;
}

.statement__aside {
  padding-top: 0.75rem;
}

.statement__body {
  color: var(--muted);
}

.statement__foot {
  margin-top: 2.5rem;
}

@media (max-width: 860px) {
  .statement__grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------- */
/* Services (grille 3)                                                  */
/* --------------------------------------------------------------------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border-block: 1px solid var(--hairline);
}

.service {
  background: var(--ground);
  padding: clamp(1.75rem, 1rem + 2.5vw, 3rem) clamp(1.5rem, 1rem + 1.5vw, 2.25rem);
  display: grid;
  gap: 1.1rem;
  align-content: start;
  transition: background-color 0.3s var(--ease);
}

.service:hover {
  background: var(--ground-raised);
}

.service__icon {
  width: 3.25rem;
  height: 3.25rem;
  color: var(--halo);
  margin-bottom: 0.25rem;
}

.service__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--hairline);
}

.service h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.85rem);
  letter-spacing: -0.02em;
}

.service p {
  color: var(--muted);
  font-size: 0.98rem;
}

.services__after {
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.services__after::before {
  content: "+ ";
  color: var(--halo);
}

/* --------------------------------------------------------------------- */
/* Cas d'usage (accordéon) + panneau                                    */
/* --------------------------------------------------------------------- */

.usecases {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: start;
}

.accordion {
  border-top: 1px solid var(--hairline);
}

.accordion__item {
  border-bottom: 1px solid var(--hairline);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: clamp(1.1rem, 0.8rem + 1vw, 1.8rem) 0;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.5rem, 1rem + 2vw, 2.6rem);
  letter-spacing: -0.03em;
  color: var(--muted);
  position: relative;
  transition: color 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.accordion__trigger:hover {
  color: var(--bone);
}

.accordion__item.is-open .accordion__trigger {
  color: var(--bone);
  padding-left: 1.25rem;
}

.accordion__item.is-open .accordion__trigger::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--halo);
}

.accordion__sign {
  flex: none;
  width: 1.5rem;
  height: 1.5rem;
  position: relative;
}

.accordion__sign::before,
.accordion__sign::after {
  content: "";
  position: absolute;
  inset: 50% 0 auto 0;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.accordion__sign::after {
  transform: rotate(90deg);
}

.accordion__item.is-open .accordion__sign::after {
  transform: rotate(0);
  opacity: 0;
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s var(--ease);
}

.accordion__panel-inner {
  overflow: hidden;
}

.accordion__item.is-open .accordion__panel {
  grid-template-rows: 1fr;
}

.accordion__panel p {
  color: var(--muted);
  padding-bottom: 1.6rem;
  padding-left: 1.25rem;
  max-width: 44ch;
}

.usecases__aside {
  position: sticky;
  top: 7rem;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 1.75rem;
  background: linear-gradient(160deg, var(--ground-raised), var(--ground));
}

.usecases__aside .flux {
  width: 100%;
  height: auto;
  color: var(--halo);
}

.usecases__aside figcaption {
  margin-top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* --------------------------------------------------------------------- */
/* Bande pleine largeur (visuel flux)                                   */
/* --------------------------------------------------------------------- */

.band {
  background: var(--ground-deep);
  min-height: 54vh;
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
  padding-block: clamp(4rem, 3rem + 6vw, 8rem);
}

.band::before {
  content: "";
  position: absolute;
  width: min(80vw, 46rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(255, 94, 51, 0.16),
    rgba(255, 94, 51, 0) 62%
  );
  pointer-events: none;
}

.band__ring {
  position: relative;
  width: clamp(19rem, 52vw, 38rem);
  color: var(--bone);
}

.band__arc {
  transform-origin: 150px 150px;
  animation: spin 30s linear infinite;
  color: var(--halo);
}

.band__core {
  fill: var(--halo);
}

.band__caption {
  position: absolute;
  left: max(1.5rem, (100% - var(--wrap)) / 2);
  bottom: 2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.band__caption::before {
  content: "— ";
  color: var(--halo);
}

/* --------------------------------------------------------------------- */
/* Offre phare (halo)                                                   */
/* --------------------------------------------------------------------- */

.flagship {
  position: relative;
  text-align: center;
  overflow: hidden;
}

.flagship::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      ellipse 42% 40% at 50% 52%,
      rgba(255, 94, 51, 0.34),
      transparent 70%
    ),
    radial-gradient(
      ellipse 78% 70% at 50% 55%,
      rgba(255, 94, 51, 0.12),
      transparent 72%
    );
  pointer-events: none;
}

.flagship > * {
  position: relative;
}

.flagship .eyebrow {
  justify-content: center;
}

.flagship__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 1.2rem + 3.6vw, 4.25rem);
  letter-spacing: -0.03em;
  margin-block: 1.5rem 1.5rem;
}

.flagship__body {
  margin-inline: auto;
  max-width: 48ch;
  color: var(--bone);
}

.flagship__specs {
  margin: 2.5rem auto 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1rem;
  max-width: 44rem;
}

.flagship__specs li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  padding: 0.5rem 1rem;
}

.flagship__cta {
  margin-top: 2.5rem;
}

.flagship__note {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

/* --------------------------------------------------------------------- */
/* Méthode (split sombre / clair)                                       */
/* --------------------------------------------------------------------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.split__panel {
  padding: clamp(2rem, 1rem + 4vw, 4.5rem);
  display: grid;
  gap: 1.5rem;
  align-content: start;
}

.split__panel--dark {
  background: var(--ground-raised);
}

.split__panel--bone {
  background: var(--bone-2);
  color: var(--ink);
}

.split__panel h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem);
  letter-spacing: -0.03em;
}

.step-list {
  display: grid;
  gap: 1.1rem;
}

.step-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: baseline;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--hairline);
}

.split__panel--bone .step-list li {
  border-bottom-color: var(--hairline-ink);
}

.step-list li::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  background: var(--halo);
  transform: translateY(-0.15rem);
}

.split__panel--bone .step-list li::before {
  background: var(--halo-ink);
}

.step-list b {
  font-weight: 600;
}

.step-list span {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  margin-top: 0.15rem;
}

.split__panel--bone .step-list span {
  color: var(--muted-ink);
}

/* --------------------------------------------------------------------- */
/* Formules (section claire, 3)                                         */
/* --------------------------------------------------------------------- */

.formulas {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1.75rem, 1rem + 2.5vw, 3rem);
}

@media (max-width: 1040px) {
  .formulas {
    grid-template-columns: repeat(2, 1fr);
  }
}

.formula {
  display: grid;
  gap: 1rem;
  align-content: start;
  text-align: center;
}

.formula__chip {
  width: 6rem;
  height: 6rem;
  border-radius: 50%;
  margin-inline: auto;
  margin-bottom: 0.5rem;
  background: radial-gradient(circle at 36% 30%, #fff 0%, #cfc7b9 42%, transparent 43%),
    radial-gradient(circle at 50% 50%, #d9d2c4, #a79e8d);
  box-shadow: inset 0 2px 12px rgba(255, 255, 255, 0.6),
    inset 0 -8px 18px rgba(23, 19, 16, 0.18), 0 12px 30px -12px rgba(23, 19, 16, 0.3);
}

.formula:nth-child(2) .formula__chip {
  background: radial-gradient(circle at 36% 30%, #fff, #d7c6b0 40%),
    radial-gradient(circle at 50% 50%, #e6cdad, #b98f5e);
}

.formula:nth-child(3) .formula__chip {
  background: radial-gradient(circle at 36% 30%, #fff, #c9cdd0 40%),
    radial-gradient(circle at 50% 50%, #cfd3d6, #9aa0a4);
}

.formula:nth-child(4) .formula__chip {
  background: radial-gradient(circle at 36% 30%, #fff, #e7cbbe 40%),
    radial-gradient(circle at 50% 50%, #e3c4b4, #b98a72);
}

.formula h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.9rem);
  letter-spacing: -0.02em;
}

.formula p {
  color: var(--muted-ink);
  font-size: 0.98rem;
  max-width: 32ch;
  margin-inline: auto;
}

.formulas__note {
  margin-top: clamp(2.5rem, 1.5rem + 3vw, 4rem);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--muted-ink);
}

/* --------------------------------------------------------------------- */
/* Bande CTA                                                            */
/* --------------------------------------------------------------------- */

.cta-band {
  position: relative;
  text-align: center;
  overflow: hidden;
  padding-block: clamp(5rem, 3rem + 10vw, 10rem);
}

.cta-band__ghost {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.cta-band__title {
  position: relative;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2rem, 1.2rem + 4vw, 4.5rem);
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}

.cta-band .btn {
  position: relative;
}

/* --------------------------------------------------------------------- */
/* Contact + FAQ                                                        */
/* --------------------------------------------------------------------- */

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 1rem + 5vw, 6rem);
  align-items: start;
}

.contact__form {
  display: grid;
  gap: 1.25rem;
}

.field {
  display: grid;
  gap: 0.5rem;
}

.field label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.field input,
.field textarea {
  background: rgba(236, 231, 223, 0.04);
  border: 1px solid rgba(236, 231, 223, 0.22);
  border-radius: 3px;
  padding: 0.85rem 1rem;
  color: var(--bone);
  font-family: var(--font-body);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.field input:hover,
.field textarea:hover {
  border-color: rgba(236, 231, 223, 0.4);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--halo);
}

.field textarea {
  resize: vertical;
  min-height: 7rem;
}

.contact__form .btn {
  justify-self: start;
  margin-top: 0.5rem;
}

.form-status {
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.4em;
}

.form-status.is-active {
  color: var(--bone);
}

.form-status a {
  color: var(--halo);
  border-bottom: 1px solid var(--halo);
}

.contact__direct {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact__direct a {
  color: var(--bone);
  border-bottom: 1px solid var(--hairline);
}

.faq {
  border-top: 1px solid var(--hairline);
}

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

.faq__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  text-align: left;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--bone);
}

.faq__trigger .accordion__sign {
  width: 1.1rem;
  height: 1.1rem;
  color: var(--halo);
}

.faq__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s var(--ease);
}

.faq__panel > div {
  overflow: hidden;
}

.faq__item.is-open .faq__panel {
  grid-template-rows: 1fr;
}

.faq__panel p {
  color: var(--muted);
  padding-bottom: 1.25rem;
  max-width: 50ch;
}

/* --------------------------------------------------------------------- */
/* Pied de page                                                         */
/* --------------------------------------------------------------------- */

.site-footer {
  position: relative;
  border-top: 1px solid var(--hairline);
  padding-top: clamp(3.5rem, 2rem + 5vw, 6.5rem);
  padding-bottom: 2.5rem;
  overflow: hidden;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.site-footer__col--wide {
  display: grid;
  gap: 1.25rem;
  justify-items: start;
  max-width: 34ch;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

.site-footer__tag {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}

.site-footer__col ul {
  display: grid;
  gap: 0.65rem;
}

.site-footer__col a {
  color: var(--bone);
  font-size: 0.95rem;
}

.site-footer__col a:hover {
  color: var(--halo);
}

.site-footer__ghost {
  display: flex;
  justify-content: center;
  overflow: hidden;
  margin-block: clamp(1.5rem, 4vw, 3rem) 0;
}

.site-footer__legal {
  width: 100%;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.site-footer__legal a:hover {
  color: var(--bone);
}

@media (max-width: 720px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
  .site-footer__col--wide {
    grid-column: 1 / -1;
  }
}

/* --------------------------------------------------------------------- */
/* Révélation au scroll                                                 */
/* --------------------------------------------------------------------- */

/* Sans JS : tout reste visible. Avec JS : masqué puis révélé au défilement. */
html.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

html.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html.js .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .orbe::before,
  .band__arc,
  .hero__scroll::before {
    animation: none !important;
  }
}

/* --------------------------------------------------------------------- */
/* Skip link                                                            */
/* --------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 200;
  background: var(--bone);
  color: var(--ground);
  padding: 0.6rem 1rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 1rem;
}

/* --------------------------------------------------------------------- */
/* Responsive                                                           */
/* --------------------------------------------------------------------- */

@media (max-width: 960px) {
  :root {
    --gutter: 1.5rem;
  }

  .site-nav__links {
    display: none;
  }

  .site-nav .btn {
    display: none;
  }

  .nav-toggle {
    display: inline-block;
  }

  .usecases {
    grid-template-columns: 1fr;
  }

  .usecases__aside {
    position: static;
  }

  .contact {
    grid-template-columns: 1fr;
  }

  .split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .formulas {
    grid-template-columns: 1fr;
  }

  .hero__sub {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__scroll {
    display: none;
  }

  .band__caption {
    left: 1.5rem;
  }
}