/* ==========================================================================
   AMCONCEPT.PRO — Feuille de styles principale

   Sommaire :
   01. Variables et base
   02. Typographie et composants communs
   03. Navigation desktop / mobile
   04. Heroes
   05. Accueil
   06. Pages métiers
   07. Méthode, moyens et contact
   08. Footer
   09. Animations discrètes
   10. Responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   01. Variables et base
   -------------------------------------------------------------------------- */

:root {
  --page: #f4f2ed;
  --paper: #ffffff;
  --ink: #121212;
  --muted: #66635e;
  --line: rgba(18, 18, 18, 0.14);
  --line-light: rgba(255, 255, 255, 0.18);
  --red: #b72026;
  --red-dark: #8d161b;
  --dark: #151515;
  --dark-soft: #20201e;
  --technical: #d9d9d2;
  --max: 1440px;
  --gutter: clamp(22px, 4vw, 72px);
  --section: clamp(84px, 11vw, 170px);
  --header-height: 92px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

/*
  STABILITÉ HORIZONTALE SUR MOBILE
  Certaines apparitions entrent légèrement depuis la gauche ou la droite.
  Elles restent visuellement intactes, mais ne peuvent plus élargir la page
  ni entraîner le site latéralement pendant un défilement vertical.
*/
html,
body {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
  overscroll-behavior-x: none;
}

@supports not (overflow: clip) {
  html,
  body {
    overflow-x: hidden;
  }
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--page);
  color: var(--ink);
  font-family: "Montserrat", Arial, sans-serif;
  font-size: 16px;
  font-variant: small-caps;
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

/*
  FLÈCHE VECTORIELLE EN CSS
  Elle remplace les glyphes typographiques dont le rendu varie entre
  macOS, iOS et iPadOS. Par défaut, elle pointe vers la droite.
*/
.arrow {
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin-left: 0.18em;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  transform: rotate(45deg);
  vertical-align: 0.05em;
}

.normal-case,
a[href^="mailto:"],
a[href^="tel:"],
.web-address {
  font-variant: normal;
  text-transform: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
}

::selection {
  background: var(--red);
  color: #fff;
}

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

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

.section--paper {
  background: var(--paper);
}

.section--dark {
  background: var(--dark);
  color: #fff;
}

.section--compact {
  padding-block: clamp(64px, 8vw, 112px);
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 14px;
  left: 14px;
  padding: 12px 18px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   02. Typographie et composants communs
   -------------------------------------------------------------------------- */

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  font-weight: 200;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 1060px;
  margin-bottom: clamp(24px, 3vw, 42px);
  font-size: clamp(2.9rem, 7vw, 7.5rem);
}

h2 {
  margin-bottom: clamp(28px, 4vw, 56px);
  font-size: clamp(2.35rem, 5vw, 5rem);
}

h3 {
  margin-bottom: 18px;
  font-size: clamp(1.55rem, 2.4vw, 2.35rem);
}

h4 {
  margin-bottom: 12px;
  font-size: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

.eyebrow,
.mono-label,
.card-index,
.metric-label,
.placeholder-label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.45;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
}

.eyebrow::before {
  width: 28px;
  height: 1px;
  background: currentColor;
  content: "";
  opacity: 0.7;
}

.eyebrow--red {
  color: var(--red);
}

.lead {
  max-width: 790px;
  font-size: clamp(1.12rem, 1.65vw, 1.5rem);
  font-weight: 300;
  line-height: 1.65;
}

.copy {
  max-width: 680px;
  color: var(--muted);
  font-size: clamp(1rem, 1.25vw, 1.14rem);
}

.copy--light {
  color: rgba(255, 255, 255, 0.68);
}

.red-text {
  color: var(--red);
}

.display-line {
  display: block;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 13px;
  padding: 13px 22px;
  border: 1px solid var(--ink);
  border-radius: 100px;
  background: transparent;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background 250ms var(--ease), color 250ms var(--ease), border-color 250ms var(--ease), transform 250ms var(--ease);
}

.button::after {
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  content: "";
  font-size: 1rem;
  line-height: 1;
  transform: rotate(45deg);
}

.button:hover,
.button:focus-visible {
  background: var(--ink);
  color: #fff;
  transform: translateY(-2px);
}

.button--red {
  border-color: var(--red);
  background: var(--red);
  color: #fff;
}

.button--red:hover,
.button--red:focus-visible {
  border-color: var(--red-dark);
  background: var(--red-dark);
}

.button--light {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.button--light:hover,
.button--light:focus-visible {
  border-color: #fff;
  background: #fff;
  color: var(--ink);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 5px;
  border-bottom: 1px solid currentColor;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.text-link::after {
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  flex: 0 0 auto;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  content: "";
  font-size: 1rem;
  transform: rotate(45deg);
  transition: transform 200ms var(--ease);
}

.text-link:hover::after,
.text-link:focus-visible::after {
  transform: translateX(5px) rotate(45deg);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(180px, 0.65fr) minmax(0, 1.6fr);
  gap: clamp(40px, 8vw, 130px);
  align-items: start;
  margin-bottom: clamp(58px, 8vw, 118px);
}

.section-head h2 {
  max-width: 900px;
  margin-bottom: 28px;
}

.rule-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.rule-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 18px;
  padding-block: 18px;
  border-top: 1px solid var(--line);
}

.rule-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.rule-list .card-index {
  color: var(--red);
}

.inline-note {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.inline-note::before {
  color: var(--red);
  content: "●";
  font-size: 0.58rem;
  transform: translateY(8px);
}

.breadcrumb {
  padding: 28px 20px;
  border-top: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.22em;
  line-height: 1.65;
  text-align: center;
  text-transform: uppercase;
}

.breadcrumb a {
  color: var(--ink);
  transition: color 180ms ease;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--red);
}

/* --------------------------------------------------------------------------
   03. Navigation desktop / mobile
   -------------------------------------------------------------------------- */

.site-header {
  position: fixed;
  z-index: 102;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  border-bottom: 0;
  background: linear-gradient(to bottom, rgba(244, 242, 237, 0.94), rgba(244, 242, 237, 0));
  color: var(--ink);
  transition: height 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
}

.site-header.is-scrolled {
  height: 72px;
  background: rgba(244, 242, 237, 0.9);
  box-shadow: 0 10px 35px rgba(20, 20, 20, 0.06);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
}

.site-header--solid {
  background: rgba(244, 242, 237, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
}

.site-header__inner {
  display: flex;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 0 3%;
}

.brand {
  position: relative;
  z-index: 102;
  display: inline-flex;
  align-items: center;
  gap: 13px;
}

.brand__logo {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.brand img {
  width: 200px;
}

.brand__pro {
  padding: 3px 6px;
  border: 1px solid currentColor;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  line-height: 1;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 34px);
}

.desktop-nav a {
  position: relative;
  padding-block: 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  transition: color 0.25s ease;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: 8px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 250ms var(--ease);
}

.desktop-nav a:hover::after,
.desktop-nav a:focus-visible::after,
.desktop-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.desktop-nav .nav-external {
  color: var(--red);
}

.menu-toggle {
  position: relative;
  z-index: 102;
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle__lines {
  position: relative;
  display: block;
  width: 24px;
  height: 18px;
}

.menu-toggle__lines > span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s ease, top 0.3s ease, opacity 0.3s ease;
}

.menu-toggle__lines > span:nth-child(1) { top: 0; }
.menu-toggle__lines > span:nth-child(2) { top: 8px; }
.menu-toggle__lines > span:nth-child(3) { top: 16px; }
.menu-toggle[aria-expanded="true"] .menu-toggle__lines > span:nth-child(1) { top: 8px; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle__lines > span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] .menu-toggle__lines > span:nth-child(3) { top: 8px; transform: rotate(-45deg); }

.mobile-panel {
  position: fixed;
  z-index: 101;
  inset: 0;
  display: grid;
  visibility: hidden;
  grid-template-rows: 1fr auto;
  padding: 112px var(--gutter) 30px;
  background: var(--page);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-16px);
  transition: opacity 260ms ease, transform 350ms var(--ease), visibility 350ms;
}

.mobile-panel.is-open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.mobile-nav a {
  padding-block: 13px;
  border-bottom: 1px solid var(--line);
  font-size: clamp(1.65rem, 7vw, 3rem);
  font-weight: 200;
  line-height: 1.12;
}

.mobile-nav a[aria-current="page"] {
  color: var(--red);
}

.mobile-panel__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  padding-top: 24px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.mobile-panel__foot a:last-child {
  color: var(--red);
}

/* Header posé sur un hero photographique sombre */
.site-header--over-hero:not(.is-scrolled) {
  color: var(--ink);
}

.site-header--over-hero:not(.is-scrolled) .brand img {
  filter: none;
}

.site-header--over-hero.is-scrolled {
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   04. Heroes
   -------------------------------------------------------------------------- */

.home-hero {
  position: relative;
  min-height: min(940px, 100svh);
  overflow: hidden;
  background: #1b1b1a;
  color: #fff;
}

.home-hero__media,
.home-hero__media::after {
  position: absolute;
  inset: 0;
}

.home-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
  filter: saturate(0.62) contrast(1.05);
}

.home-hero__media::after {
  background:
    linear-gradient(90deg, rgba(11, 11, 11, 0.83) 0%, rgba(11, 11, 11, 0.58) 43%, rgba(11, 11, 11, 0.08) 76%),
    linear-gradient(0deg, rgba(11, 11, 11, 0.7) 0%, transparent 35%);
  content: "";
}

.home-hero__content {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: min(940px, 100svh);
  flex-direction: column;
  justify-content: center;
  padding-top: 130px;
  padding-bottom: 96px;
}

.home-hero h1 {
  max-width: 970px;
  font-size: clamp(3.35rem, 8.3vw, 8.8rem);
}

.home-hero__intro {
  max-width: 690px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(1.02rem, 1.4vw, 1.3rem);
}

.home-hero__foot {
  position: absolute;
  right: 0;
  bottom: 38px;
  left: 0;
  z-index: 3;
}

.hero-signals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-left: auto;
  max-width: 620px;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-signal {
  min-height: 82px;
  padding: 17px 18px 0;
  border-left: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-signal:first-child {
  border-left: 0;
}

.hero-signal strong {
  display: block;
  margin-top: 5px;
  font-size: 0.88rem;
  font-weight: 400;
  line-height: 1.4;
}

.hero-signal .mono-label {
  color: rgba(255, 255, 255, 0.52);
  font-size: 0.58rem;
}

.page-hero {
  padding-top: calc(var(--header-height) + clamp(72px, 8vw, 126px));
  padding-bottom: clamp(72px, 9vw, 136px);
}

.page-hero--dark {
  position: relative;
  min-height: 760px;
  overflow: hidden;
  background: var(--dark);
  color: #fff;
}

.page-hero--dark .page-hero__backdrop {
  position: absolute;
  inset: 0;
}

.page-hero--dark .page-hero__backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.38;
  filter: grayscale(0.25) contrast(1.05);
}

.page-hero--dark .page-hero__backdrop::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(16, 16, 15, 0.88) 0%, rgba(16, 16, 15, 0.52) 60%, rgba(16, 16, 15, 0.34) 100%);
  content: "";
}

.page-hero__content {
  position: relative;
  z-index: 2;
}

.page-hero h1 {
  max-width: 1130px;
  font-size: clamp(3rem, 7.5vw, 7.8rem);
}

.page-hero__intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  gap: clamp(38px, 8vw, 120px);
  align-items: end;
}

.page-hero__quick {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-hero__quick li {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 12px;
  padding-block: 12px;
  border-top: 1px solid currentColor;
  font-size: 0.86rem;
  opacity: 0.8;
}

.page-hero__quick li::before {
  color: var(--red);
  content: "✓";
}

.page-hero--dark .page-hero__quick li {
  border-color: rgba(255, 255, 255, 0.22);
}

/* --------------------------------------------------------------------------
   05. Accueil
   -------------------------------------------------------------------------- */

.thesis-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(290px, 0.55fr);
  gap: clamp(70px, 12vw, 190px);
  align-items: start;
}

.thesis-grid h2 {
  max-width: 950px;
}

.thesis-aside {
  padding-top: clamp(30px, 8vw, 100px);
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.expertise-card {
  position: relative;
  display: flex;
  min-height: clamp(370px, 43vw, 620px);
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: clamp(28px, 4vw, 58px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.expertise-card__visual {
  position: absolute;
  inset: 0;
  background: var(--dark-soft);
  opacity: 0;
  transition: opacity 500ms var(--ease), transform 900ms var(--ease);
}

.expertise-card__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.55) contrast(1.08);
  transform: scale(1.04);
  transition: transform 900ms var(--ease);
}

.expertise-card__visual::after {
  position: absolute;
  inset: 0;
  background: rgba(16, 16, 15, 0.56);
  content: "";
}

.expertise-card__top,
.expertise-card__bottom {
  position: relative;
  z-index: 2;
}

.expertise-card__top {
  display: flex;
  justify-content: space-between;
}

.expertise-card h3 {
  max-width: 490px;
  margin-bottom: 22px;
  font-size: clamp(2rem, 4vw, 4.3rem);
}

.expertise-card p {
  max-width: 440px;
  color: var(--muted);
}

.expertise-card__arrow {
  width: 50px;
  height: 50px;
  border: 1px solid currentColor;
  border-radius: 50%;
  display: grid;
  place-items: center;
  transition: transform 280ms var(--ease), background 280ms ease, color 280ms ease;
}

.expertise-card__arrow::before {
  display: block;
  width: 0.65em;
  height: 0.65em;
  border-top: 1.5px solid currentColor;
  border-right: 1.5px solid currentColor;
  content: "";
}

.flow-arrow {
  margin: 0 0.45em;
  vertical-align: 0.08em;
}

.expertise-card:hover,
.expertise-card:focus-visible {
  color: #fff;
}

.expertise-card:hover .expertise-card__visual,
.expertise-card:focus-visible .expertise-card__visual {
  opacity: 1;
}

.expertise-card:hover .expertise-card__visual img,
.expertise-card:focus-visible .expertise-card__visual img {
  transform: scale(1);
}

.expertise-card:hover p,
.expertise-card:focus-visible p {
  color: rgba(255, 255, 255, 0.72);
}

.expertise-card:hover .expertise-card__arrow,
.expertise-card:focus-visible .expertise-card__arrow {
  background: #fff;
  color: var(--ink);
  transform: rotate(45deg);
}

.integration-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(52px, 9vw, 145px);
  align-items: center;
}

.integration-visual {
  position: relative;
  min-height: clamp(470px, 56vw, 760px);
  overflow: hidden;
  background: #d8d5cd;
}

.integration-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}

.document-stack {
  position: absolute;
  right: clamp(18px, 3vw, 48px);
  bottom: clamp(18px, 3vw, 48px);
  z-index: 2;
  width: min(62%, 330px);
  padding: clamp(20px, 3vw, 34px);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.18);
}

.document-stack__row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-block: 10px;
  border-bottom: 1px solid var(--line);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.document-stack__row:last-child {
  border-bottom: 0;
}

.document-stack__row span:last-child {
  color: var(--red);
}

.flow-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-light);
  border-left: 1px solid var(--line-light);
}

.flow-step {
  min-height: 230px;
  padding: clamp(24px, 3vw, 42px);
  border-right: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.flow-step .card-index {
  display: block;
  margin-bottom: 54px;
  color: #d35a5e;
}

.flow-step h3 {
  margin-bottom: 10px;
  font-size: clamp(1.25rem, 2vw, 1.75rem);
}

.flow-step p {
  margin: 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 0.86rem;
}

.judgement-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.55fr);
  gap: clamp(56px, 10vw, 150px);
  align-items: end;
}

.judgement-layout blockquote {
  max-width: 980px;
  margin: 0;
  font-size: clamp(2.5rem, 5.5vw, 6rem);
  font-weight: 100;
  letter-spacing: -0.045em;
  line-height: 1.06;
}

.judgement-person {
  padding-top: 40px;
  border-top: 1px solid var(--line-light);
}

.judgement-person img {
  width: min(100%, 300px);
  margin-bottom: 28px;
  filter: grayscale(1);
}

/* Une seule touche manuscrite, héritée de la famille .fr / .store. */
.human-signature {
  margin: -8px 0 18px;
  color: #d35a5e;
  font-family: "Pecita", cursive;
  font-size: 2.4rem;
  line-height: 1;
    font-variant: normal;
  text-transform: none;
}

.fit-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.fit-card {
  padding: clamp(34px, 5vw, 72px);
  background: var(--paper);
}

.fit-card--muted {
  background: #eae8e2;
}

.fit-card h3 {
  max-width: 500px;
  margin-bottom: 44px;
}

.fit-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.fit-card li {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  padding-block: 13px;
  border-top: 1px solid var(--line);
}

.fit-card li::before {
  content: "+";
  color: var(--red);
  font-family: "IBM Plex Mono", monospace;
}

.fit-card--muted li::before {
  color: var(--muted);
  content: "–";
}

/* --------------------------------------------------------------------------
   06. Pages métiers
   -------------------------------------------------------------------------- */

.answer-strip {
  position: relative;
  z-index: 4;
  margin-top: -44px;
}

.answer-strip__inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background: var(--paper);
  box-shadow: 0 20px 60px rgba(14, 14, 13, 0.09);
}

.answer-card {
  min-height: 185px;
  padding: clamp(26px, 3.3vw, 48px);
  border-right: 1px solid var(--line);
}

.answer-card:last-child {
  border-right: 0;
}

.answer-card .card-index {
  display: block;
  margin-bottom: 32px;
  color: var(--red);
}

.answer-card strong {
  display: block;
  max-width: 330px;
  font-size: clamp(1.05rem, 1.45vw, 1.28rem);
  font-weight: 400;
  line-height: 1.5;
}

.content-split {
  display: grid;
  grid-template-columns: minmax(250px, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(48px, 10vw, 160px);
  align-items: start;
}

.content-split__aside {
  position: sticky;
  top: 120px;
}

.content-split__aside h2 {
  font-size: clamp(2.3rem, 4.3vw, 4.5rem);
}

.spec-list {
  border-top: 1px solid var(--line);
}

.spec-row {
  display: grid;
  grid-template-columns: minmax(120px, 0.42fr) minmax(0, 1fr);
  gap: clamp(20px, 5vw, 70px);
  padding-block: clamp(25px, 3.5vw, 46px);
  border-bottom: 1px solid var(--line);
}

.spec-row h3 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
}

.spec-row p {
  max-width: 610px;
  margin: 0;
  color: var(--muted);
}

.visual-placeholder {
  position: relative;
  display: grid;
  min-height: clamp(390px, 51vw, 690px);
  place-items: center;
  overflow: hidden;
  padding: var(--gutter);
  border: 1px solid var(--line);
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    #e9e7e1;
  background-size: 42px 42px;
}

.visual-placeholder::before,
.visual-placeholder::after {
  position: absolute;
  background: var(--line);
  content: "";
}

.visual-placeholder::before {
  width: 140%;
  height: 1px;
  transform: rotate(32deg);
}

.visual-placeholder::after {
  width: 140%;
  height: 1px;
  transform: rotate(-32deg);
}

.visual-placeholder__note {
  position: relative;
  z-index: 2;
  max-width: 540px;
  padding: clamp(26px, 4vw, 48px);
  background: rgba(244, 242, 237, 0.94);
  text-align: center;
}

.visual-placeholder__note p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.placeholder-label {
  display: block;
  margin-bottom: 15px;
  color: var(--red);
}

.timeline {
  counter-reset: timeline;
}

.timeline-row {
  position: relative;
  display: grid;
  grid-template-columns: 90px minmax(180px, 0.55fr) minmax(0, 1fr);
  gap: clamp(18px, 4vw, 62px);
  padding-block: clamp(30px, 4vw, 56px);
  border-top: 1px solid var(--line);
  counter-increment: timeline;
}

.timeline-row:last-child {
  border-bottom: 1px solid var(--line);
}

.timeline-row::before {
  color: var(--red);
  content: counter(timeline, decimal-leading-zero);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.timeline-row h3 {
  margin: 0;
  font-size: clamp(1.25rem, 2vw, 1.8rem);
}

.timeline-row p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
}

.question-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(290px, 0.65fr);
  gap: clamp(50px, 10vw, 160px);
  padding: clamp(40px, 7vw, 100px);
  background: var(--dark);
  color: #fff;
}

.question-panel h2 {
  max-width: 800px;
}

.question-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.question-panel li {
  padding-block: 13px;
  border-top: 1px solid var(--line-light);
  color: rgba(255, 255, 255, 0.72);
}

.question-panel li:last-child {
  border-bottom: 1px solid var(--line-light);
}

.next-expertise {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: end;
  padding-block: clamp(48px, 7vw, 90px);
  border-top: 1px solid var(--line);
}

.next-expertise h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 4.4rem);
}

/* --------------------------------------------------------------------------
   07. Méthode, moyens et contact
   -------------------------------------------------------------------------- */

.method-principle {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(52px, 10vw, 150px);
  align-items: center;
}

.method-principle__image {
  position: relative;
  min-height: clamp(430px, 55vw, 730px);
  overflow: hidden;
}

.method-principle__image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.principle-statement {
  padding-left: clamp(24px, 5vw, 76px);
  border-left: 1px solid var(--red);
}

.principle-statement p {
  font-size: clamp(1.55rem, 3vw, 3rem);
  font-weight: 200;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.documents-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.document-card {
  min-height: 280px;
  padding: clamp(26px, 3.5vw, 48px);
  background: var(--paper);
  color: var(--ink);
}

.document-card .mono-label {
  display: block;
  margin-bottom: 70px;
  color: var(--red);
}

.document-card h3 {
  font-size: 1.45rem;
}

.document-card p {
  color: var(--muted);
  font-size: 0.92rem;
}

.equipment-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.5fr);
  gap: clamp(48px, 10vw, 160px);
  align-items: end;
}

.equipment-table {
  width: 100%;
  border-collapse: collapse;
}

.equipment-table th,
.equipment-table td {
  padding: 25px 18px;
  border-top: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.equipment-table th {
  width: 10%;
  padding-left: 0;
  font-size: 1rem;
  font-weight: 500;
}

.equipment-table td b {
  font-weight: 800;
}

.equipment-table td {
  color: var(--muted);
}

.equipment-table td:last-child {
  width: 60%;
  padding-right: 0;
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.equipment-edit-note {
  margin-top: 30px;
  padding: 22px;
  border: 1px dashed var(--red);
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
}

.contact-hero {
  min-height: 770px;
  display: flex;
  align-items: center;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(310px, 0.55fr);
  gap: clamp(70px, 12vw, 180px);
  align-items: end;
}

.phone-link {
  display: inline-block;
  margin: 10px 0 28px;
  color: var(--red);
  font-size: clamp(2.8rem, 7.3vw, 7.8rem);
  font-weight: 100;
  letter-spacing: -0.055em;
  line-height: 1;
}

.phone-link:hover,
.phone-link:focus-visible {
  color: var(--red-dark);
}

.contact-card {
  padding: clamp(30px, 4vw, 50px);
  background: var(--paper);
}

.contact-card dl {
  margin: 0;
}

.contact-card dt {
  margin-top: 24px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-card dt:first-child {
  margin-top: 0;
}

.contact-card dd {
  margin: 7px 0 0;
  color: var(--muted);
}

.prep-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.prep-card {
  min-height: 260px;
  padding: clamp(24px, 3vw, 40px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.prep-card .card-index {
  display: block;
  margin-bottom: 54px;
  color: var(--red);
}

.prep-card h3 {
  font-size: 1.35rem;
}

.legal-content {
  max-width: 900px;
}

.legal-content section {
  padding-block: 42px;
  border-top: 1px solid var(--line);
}

.legal-content h2 {
  margin-bottom: 24px;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.legal-content h3 {
  margin-top: 30px;
  font-size: 1.3rem;
}

.legal-content p,
.legal-content li {
  color: var(--muted);
}

/* --------------------------------------------------------------------------
   08. Footer et appel final
   -------------------------------------------------------------------------- */

.contact-band {
  position: relative;
  overflow: hidden;
  padding-block: clamp(75px, 10vw, 145px);
  background: var(--red);
  color: #fff;
}

.contact-band__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) auto;
  gap: 50px;
  align-items: end;
}

.contact-band h2 {
  max-width: 1050px;
  margin: 0;
}

.contact-band__phone {
  display: inline-block;
  white-space: nowrap;
  padding-bottom: 7px;
  border-bottom: 1px solid currentColor;
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(1rem, 1.7vw, 1.4rem);
}

.contact-band__phone:hover,
.contact-band__phone:focus-visible {
  opacity: 0.75;
}

.site-footer {
  padding-top: clamp(72px, 10vw, 140px);
  padding-bottom: 28px;
  background: #111;
  color: #fff;
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) repeat(3, minmax(150px, 0.6fr));
  gap: clamp(42px, 7vw, 100px);
  padding-bottom: clamp(72px, 9vw, 120px);
}

.site-footer__brand img {
  width: 190px;
  margin-bottom: 30px;
  filter: brightness(0) invert(1);
}

.site-footer__brand p {
  max-width: 350px;
  color: rgba(255, 255, 255, 0.55);
  font-size: clamp(0.95rem, 0.9vw, 1.05rem);
}

.footer-col h2 {
  margin-bottom: 28px;
  color: #fff;
  font-family: "Montserrat", Arial, sans-serif;
  font-size: clamp(0.76rem, 0.7vw, 0.82rem);
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.footer-col a,
.footer-col span {
  display: block;
  width: fit-content;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.62);
  font-size: clamp(0.95rem, 0.85vw, 1rem);
  transition: color 180ms ease;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: #fff;
}

.footer-col a .footer-link-arrow {
  display: inline-block;
  width: 0.55em;
  height: 0.55em;
  margin: 0 0 0 0.35em;
  color: inherit;
  font-size: inherit;
  vertical-align: 0.05em;
}

.footer-col a.footer-red {
  color: #d75b60;
}

.footer-univers ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-univers li {
  margin-bottom: 17px;
}

.footer-univers li > a,
.footer-univers li > a span {
  margin-bottom: 0;
}

.footer-univers small {
  display: block;
  max-width: 220px;
  color: rgba(255, 255, 255, 0.48);
  font-size: clamp(0.78rem, 0.72vw, 0.86rem);
  line-height: 1.5;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.4);
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(0.72rem, 0.68vw, 0.78rem);
  letter-spacing: 0.07em;
  line-height: 1.7;
}

.site-footer__bottom p {
  margin: 0;
}

.site-footer__bottom p:last-child {
  text-align: right;
}

/* --------------------------------------------------------------------------
   10. Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .desktop-nav {
    display: none;
  }

  .menu-toggle {
    position: absolute;
    left: 8px;
    display: flex;
  }

  .site-header,
  .site-header.is-scrolled,
  .site-header--solid {
    top: 8px;
    right: 15px;
    left: 15px;
    width: auto;
    height: 54px;
    border: 1px solid rgba(255, 255, 255, 0.62);
    border-radius: 28px;
    background: rgba(248, 248, 248, 0.68);
    color: var(--ink);
    box-shadow:
      inset 0 1px 0 rgba(255, 255, 255, 0.72),
      0 10px 28px rgba(20, 20, 20, 0.11);
    opacity: 1;
    visibility: visible;
    will-change: opacity;
    -webkit-backdrop-filter: blur(22px) saturate(180%);
    backdrop-filter: blur(22px) saturate(180%);
    transition:
      opacity 0.35s ease,
      visibility 0s linear 0s;
  }

  /*
    NAVIGATION MOBILE — DISPARITION SANS DÉPLACEMENT
    La barre reste physiquement en place et s’efface par fondu afin de ne pas
    perturber la zone située sous la Dynamic Island.
  */
  .site-header.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      opacity 0.35s ease,
      visibility 0s linear 0.35s;
  }

  .site-header__inner {
    position: relative;
    width: 100%;
    justify-content: center;
    padding-inline: 18px;
  }

  .site-header--over-hero:not(.is-scrolled) {
    color: var(--ink);
  }

  .site-header--over-hero:not(.is-scrolled) .brand img {
    filter: none;
  }

  .brand img {
    width: 166px;
  }

  /*
    REPÈRE DE LA PAGE D’ACCUEIL
    La fine ellipse reste attachée au seul logo AM CONCEPT, sans englober
    le cartouche PRO.
  */
  body[data-page="home"] .brand__logo::after {
    position: absolute;
    bottom: -8px;
    left: 50%;
    width: 70%;
    height: 6px;
    background: radial-gradient(
      ellipse at center,
      rgba(18, 18, 18, 0.75) 0%,
      rgba(18, 18, 18, 0.25) 35%,
      transparent 70%
    );
    content: "";
    pointer-events: none;
    transform: translateX(-50%);
  }

  .page-hero {
    padding-top: 118px;
  }

  .flow-track,
  .prep-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 800px) {
  :root {
    --section: 88px;
  }

  h1,
  .page-hero h1,
  .home-hero h1 {
    letter-spacing: -0.045em;
  }

  .section-head,
  .thesis-grid,
  .integration-layout,
  .judgement-layout,
  .page-hero__intro,
  .content-split,
  .method-principle,
  .equipment-intro,
  .contact-layout,
  .question-panel {
    grid-template-columns: 1fr;
  }

  .section-head,
  .thesis-grid,
  .integration-layout,
  .judgement-layout,
  .content-split,
  .method-principle,
  .equipment-intro,
  .contact-layout,
  .question-panel {
    gap: 50px;
  }

  .section-head {
    margin-bottom: 58px;
  }

  .thesis-aside {
    padding-top: 0;
  }

  .home-hero,
  .home-hero__content {
    min-height: 780px;
  }

  .home-hero__content {
    justify-content: flex-end;
    padding-bottom: 160px;
  }

  .home-hero__media img {
    object-position: 67% center;
  }

  .home-hero__media::after {
    background: linear-gradient(0deg, rgba(11, 11, 11, 0.9) 0%, rgba(11, 11, 11, 0.48) 72%, rgba(11, 11, 11, 0.28) 100%);
  }

  .hero-signals {
    max-width: none;
  }

  .expertise-grid,
  .fit-grid {
    grid-template-columns: 1fr;
  }

  .expertise-card {
    min-height: 440px;
  }

  .content-split__aside {
    position: static;
  }

  .answer-strip {
    margin-top: 0;
  }

  .answer-strip__inner {
    grid-template-columns: 1fr;
  }

  .answer-card {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .answer-card:last-child {
    border-bottom: 0;
  }

  .timeline-row {
    grid-template-columns: 55px 1fr;
  }

  .timeline-row p {
    grid-column: 2;
  }

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

  .contact-hero {
    min-height: 0;
  }

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

@media (max-width: 560px) {
  :root {
    --gutter: 18px;
  }

  body {
    font-size: 15px;
  }

  .brand__pro {
    display: none;
  }

  .home-hero,
  .home-hero__content {
    min-height: 720px;
  }

  .home-hero__content {
    padding-top: 100px;
    padding-bottom: 180px;
  }

  .home-hero__foot {
    bottom: 22px;
  }

  .hero-signals {
    grid-template-columns: 1fr;
  }

  .hero-signal {
    display: flex;
    min-height: 0;
    justify-content: space-between;
    gap: 18px;
    padding: 11px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    border-left: 0;
  }

  .hero-signal strong {
    margin-top: 0;
    font-size: 0.74rem;
    text-align: right;
  }

  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .expertise-card {
    min-height: 390px;
  }

  .integration-visual {
    min-height: 480px;
  }

  .document-stack {
    right: 12px;
    bottom: 12px;
    width: calc(100% - 24px);
  }

  .flow-track,
  .prep-grid {
    grid-template-columns: 1fr;
  }

  .flow-step,
  .prep-card {
    min-height: 0;
  }

  .flow-step .card-index,
  .prep-card .card-index,
  .document-card .mono-label {
    margin-bottom: 34px;
  }

  .spec-row {
    grid-template-columns: 1fr;
  }

  .timeline-row {
    grid-template-columns: 38px 1fr;
  }

  .next-expertise {
    grid-template-columns: 1fr;
  }

  .equipment-table,
  .equipment-table tbody,
  .equipment-table tr,
  .equipment-table th,
  .equipment-table td {
    display: block;
    width: 100%;
  }

  .equipment-table tr {
    padding-block: 22px;
    border-top: 1px solid var(--line);
  }

  .equipment-table th,
  .equipment-table td {
    padding: 5px 0;
    border: 0;
  }

  .equipment-table td:last-child {
    width: 100%;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
  }

  .site-footer__brand,
  .site-footer__brand p,
  .footer-col,
  .footer-col h2 {
    text-align: center;
  }

  .site-footer__brand img,
  .site-footer__brand p,
  .footer-col a,
  .footer-col span,
  .footer-univers small {
    margin-right: auto;
    margin-left: auto;
  }

  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .site-footer__bottom p:last-child {
    text-align: center;
  }
}

/* Respect du réglage d’accessibilité de l’utilisateur */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

}