/* ──────────────────────────────────────────────────────────
   NEURONES TECHNOLOGIES — Design System
   Inspired by Apple / McKinsey / Tesla editorial aesthetic
   ────────────────────────────────────────────────────────── */

/* ═══ TOKENS ═══ */
:root {
  /* Palette */
  --black:    #000000;
  --ink:      #1D1D1F;
  --gray-900: #1D1D1F;
  --gray-800: #2C2C2E;
  --gray-700: #3A3A3C;
  --gray-600: #6E6E73;
  --gray-400: #AEAEB2;
  --gray-200: #E5E5EA;
  --gray-100: #F5F5F7;
  --white:    #FFFFFF;
  --accent:   #0066CC;
  --accent-light: #1E80E5;

  /* Typography */
  --font-display: "Inter", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
  --font-body: "Inter", "Helvetica Neue", "Helvetica", "Arial", sans-serif;

  /* Type scale (mobile-first, fluid) */
  --fs-xs: clamp(0.75rem, 0.7rem + 0.2vw, 0.8125rem);
  --fs-sm: clamp(0.875rem, 0.85rem + 0.1vw, 0.9375rem);
  --fs-base: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --fs-lg: clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --fs-xl: clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);
  --fs-2xl: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem);
  --fs-3xl: clamp(2.25rem, 1.7rem + 2.5vw, 3.5rem);
  --fs-4xl: clamp(2.75rem, 2rem + 3.5vw, 4.75rem);
  --fs-5xl: clamp(3.5rem, 2.5rem + 4.5vw, 6.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Layout */
  --container: 1280px;
  --container-narrow: 960px;
  --gutter: clamp(1.25rem, 4vw, 3rem);

  /* Borders & radius */
  --hairline: 1px solid var(--gray-200);
  --hairline-dark: 1px solid var(--gray-800);
  --radius: 0;

  /* Transitions */
  --t: 200ms cubic-bezier(0.2, 0, 0.2, 1);
  --t-slow: 600ms cubic-bezier(0.2, 0, 0.2, 1);
}

/* ═══ RESET ═══ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  color: var(--ink);
  background: var(--white);
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t);
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

::selection {
  background: var(--accent);
  color: var(--white);
}

/* ═══ TYPOGRAPHY ═══ */
.eyebrow {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow--muted {
  color: var(--gray-600);
}

.eyebrow--light {
  color: var(--accent-light);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
}

h1 {
  font-size: var(--fs-5xl);
  font-weight: 700;
  letter-spacing: -0.035em;
}

h2 {
  font-size: var(--fs-4xl);
  letter-spacing: -0.03em;
}

h3 {
  font-size: var(--fs-2xl);
  line-height: 1.15;
}

h4 {
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.25;
}

.italic-accent {
  font-style: italic;
  color: var(--accent);
}

p {
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--ink);
}

p.lead {
  font-size: var(--fs-lg);
  line-height: 1.5;
  color: var(--gray-600);
}

p.muted {
  color: var(--gray-600);
}

.hairline-accent {
  display: block;
  width: 2.5rem;
  height: 2px;
  background: var(--accent);
  margin: var(--space-6) 0;
  border: 0;
}

/* ═══ LAYOUT ═══ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section {
  padding: var(--space-24) 0;
}

.section--tight {
  padding: var(--space-16) 0;
}

/* ═══ HEADER ═══ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: var(--hairline);
}

.site-header--dark {
  background: var(--black);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--ink);
}

.site-header--dark .brand {
  color: var(--white);
}

.brand img {
  height: 46px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-600);
  position: relative;
  padding: var(--space-2) 0;
  transition: color var(--t);
}

.site-header--dark .nav a {
  color: var(--gray-400);
}

.nav a:hover,
.nav a.active {
  color: var(--ink);
}

.site-header--dark .nav a:hover,
.site-header--dark .nav a.active {
  color: var(--white);
}

.nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--accent);
}

/* Lang switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--gray-600);
  margin-left: var(--space-4);
}

.site-header--dark .lang-switch {
  color: var(--gray-400);
}

.lang-switch button {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gray-600);
  padding: var(--space-1) var(--space-2);
  transition: color var(--t);
}

.site-header--dark .lang-switch button {
  color: var(--gray-400);
}

.lang-switch button.active {
  color: var(--accent);
}

.lang-switch span {
  color: var(--gray-400);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  width: 32px;
  height: 32px;
  position: relative;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  position: absolute;
  left: 5px;
  transition: transform var(--t), opacity var(--t);
}

.site-header--dark .menu-toggle span {
  background: var(--white);
}

.menu-toggle span:nth-child(1) { top: 11px; }
.menu-toggle span:nth-child(2) { top: 16px; }
.menu-toggle span:nth-child(3) { top: 21px; }

body.menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
body.menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}
body.menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ═══ HERO (full-bleed photo) ═══ */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: var(--black);
  color: var(--white);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0.95) 0%,
    rgba(0, 0, 0, 0.85) 30%,
    rgba(0, 0, 0, 0.5) 60%,
    rgba(0, 0, 0, 0.2) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: var(--space-32) 0;
}

.hero__eyebrow {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: var(--space-6);
}

.hero h1 {
  color: var(--white);
  max-width: 18ch;
  margin-bottom: var(--space-6);
}

.hero p {
  color: var(--gray-400);
  max-width: 50ch;
  font-size: var(--fs-lg);
  font-style: italic;
}

.hero__meta {
  display: flex;
  gap: var(--space-12);
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-width: 600px;
  flex-wrap: wrap;
}

.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hero__meta-label {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.hero__meta-value {
  font-size: 0.9375rem;
  color: var(--white);
  font-weight: 500;
}

/* ═══ SECTION TITLE BLOCK ═══ */
.section-title {
  margin-bottom: var(--space-16);
  max-width: 60ch;
}

.section-title--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-title h2 {
  margin-bottom: var(--space-4);
}

.section-title p {
  color: var(--gray-600);
  font-size: var(--fs-lg);
  font-style: italic;
  margin-top: var(--space-4);
}

/* ═══ DOMAINS GRID ═══ */
.domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0;
  border-top: var(--hairline);
}

.domain-card {
  padding: var(--space-12) var(--space-6) var(--space-12) 0;
  border-bottom: var(--hairline);
  border-right: var(--hairline);
  transition: background var(--t);
  position: relative;
  cursor: pointer;
}

.domain-card:hover {
  background: var(--gray-100);
}

.domain-card:nth-child(4n) {
  border-right: 0;
}

.domain-card__num {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--gray-400);
  margin-bottom: var(--space-6);
}

.domain-card__icon {
  width: 36px;
  height: 36px;
  margin-bottom: var(--space-6);
  color: var(--accent);
}

.domain-card__icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  stroke-width: 1.5;
  fill: none;
}

.domain-card h3 {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-2);
}

.domain-card p {
  font-size: var(--fs-sm);
  color: var(--gray-600);
}

.domain-card__arrow {
  position: absolute;
  top: var(--space-12);
  right: var(--space-6);
  font-size: 1.25rem;
  color: var(--gray-400);
  transition: transform var(--t), color var(--t);
}

.domain-card:hover .domain-card__arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* ═══ STATS BAND ═══ */
.stats {
  background: var(--ink);
  color: var(--white);
  padding: var(--space-20) 0;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: left;
}

.stats__grid--6 {
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-6);
}

.stat__num {
  font-size: var(--fs-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--white);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stats__grid--6 .stat__num {
  font-size: clamp(2.75rem, 4.5vw, 4rem);
}

.stat__num .italic-accent {
  color: var(--accent-light);
}

.stat__unit {
  font-size: 0.9375rem;
  font-style: italic;
  color: var(--gray-400);
  margin-bottom: var(--space-2);
}

.stat__label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  text-transform: uppercase;
}

/* ═══ MANIFESTO ═══ */
.manifesto {
  background: var(--black);
  color: var(--white);
  padding: var(--space-32) 0;
  position: relative;
}

.manifesto__quote-mark {
  font-size: 6rem;
  line-height: 0.8;
  color: var(--accent);
  font-style: italic;
  font-family: Georgia, serif;
  margin-bottom: var(--space-6);
}

.manifesto h2 {
  color: var(--white);
  font-weight: 400;
  font-style: italic;
  font-size: var(--fs-3xl);
  line-height: 1.25;
  max-width: 22ch;
  margin-bottom: var(--space-8);
}

.manifesto__signature {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--gray-600);
  text-transform: uppercase;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: var(--space-4);
  display: inline-block;
}

/* ═══ PARTNERS ═══ */
.partners {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: var(--hairline);
  border-left: var(--hairline);
}

.partner {
  padding: var(--space-12) var(--space-6);
  text-align: center;
  border-right: var(--hairline);
  border-bottom: var(--hairline);
  transition: background var(--t);
}

.partner:hover {
  background: var(--gray-100);
}

.partner__name {
  font-size: var(--fs-lg);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--ink);
  margin-bottom: var(--space-2);
}

.partner__hairline {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  margin: var(--space-3) auto;
}

.partner__domain {
  font-size: var(--fs-sm);
  color: var(--gray-600);
}

/* ═══ SECTION DIVIDER (full-bleed photo) ═══ */
.divider-photo {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  background: var(--black);
  color: var(--white);
  overflow: hidden;
}

.divider-photo__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.divider-photo__bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(0, 0, 0, 0.92) 0%,
    rgba(0, 0, 0, 0.80) 30%,
    rgba(0, 0, 0, 0.45) 60%,
    rgba(0, 0, 0, 0.15) 100%
  );
}

.divider-photo__content {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: var(--space-24) 0;
}

.divider-photo__num {
  font-size: clamp(5rem, 12vw, 10rem);
  font-style: italic;
  font-weight: 600;
  color: var(--accent);
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin-bottom: var(--space-6);
}

.divider-photo h2 {
  color: var(--white);
  margin-bottom: var(--space-6);
}

.divider-photo p {
  color: var(--gray-400);
  max-width: 50ch;
  font-style: italic;
}

/* ═══ APPROACH (4 columns) ═══ */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
}

.approach-item {
  position: relative;
}

.approach-item__num {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}

.approach-item__rule {
  display: block;
  width: 2px;
  height: 32px;
  background: var(--ink);
  margin: var(--space-4) 0;
}

.approach-item h3 {
  font-size: var(--fs-xl);
  margin-bottom: var(--space-3);
}

.approach-item p {
  font-size: var(--fs-sm);
  color: var(--gray-600);
}

/* ═══ TIMELINE (Histoire) ═══ */
.timeline {
  position: relative;
  padding-top: var(--space-8);
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gray-200);
}

.timeline__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-4);
}

.timeline__step {
  position: relative;
  padding-top: var(--space-6);
}

.timeline__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 2px;
  height: 12px;
  background: var(--ink);
}

.timeline__year {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--space-2);
}

.timeline__label {
  font-size: var(--fs-sm);
  color: var(--gray-600);
}

/* ═══ REFERENCES TABLE ═══ */
.references {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
}

.reference-col__head {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.reference-col__head + hr {
  border: 0;
  height: 2px;
  background: var(--ink);
  margin-bottom: var(--space-6);
}

.reference-col ul {
  list-style: none;
}

.reference-col li {
  padding: var(--space-2) 0;
  font-size: var(--fs-sm);
  color: var(--ink);
  border-bottom: var(--hairline);
}

.reference-col li.muted {
  color: var(--gray-600);
  font-style: italic;
}

/* ═══ CONTACT (form + info) ═══ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-16);
  align-items: start;
}

.contact-info {
  border-top: 2px solid var(--ink);
  padding-top: var(--space-8);
}

.contact-info__block {
  margin-bottom: var(--space-8);
}

.contact-info__label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.contact-info__value {
  font-size: var(--fs-base);
  color: var(--ink);
  line-height: 1.7;
}

.contact-info__value a:hover {
  color: var(--accent);
}

/* Form */
.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.form__field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form__field--full {
  grid-column: 1 / -1;
}

.form__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gray-600);
  text-transform: uppercase;
}

.form__input,
.form__textarea {
  padding: var(--space-3) 0;
  border: 0;
  border-bottom: var(--hairline-dark);
  background: transparent;
  color: var(--ink);
  font-size: var(--fs-base);
  transition: border-color var(--t);
}

.form__input:focus,
.form__textarea:focus {
  outline: none;
  border-bottom-color: var(--accent);
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
}

.form__submit {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  background: var(--ink);
  color: var(--white);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background var(--t), transform var(--t);
  margin-top: var(--space-4);
  width: fit-content;
}

.form__submit:hover {
  background: var(--accent);
  transform: translateY(-1px);
}

.form__submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form__status {
  grid-column: 1 / -1;
  margin-top: var(--space-4);
  font-size: var(--fs-sm);
  padding: var(--space-3) 0;
  display: none;
}

.form__status.success {
  display: block;
  color: #0a7d32;
  border-top: 2px solid #0a7d32;
  padding-top: var(--space-3);
}

.form__status.error {
  display: block;
  color: #c0392b;
  border-top: 2px solid #c0392b;
  padding-top: var(--space-3);
}

/* ═══ CTA (closing dark) ═══ */
.cta {
  background: var(--black);
  color: var(--white);
  padding: var(--space-32) 0;
}

.cta__eyebrow {
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  font-weight: 600;
  color: var(--accent-light);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
}

.cta h2 {
  color: var(--white);
  font-size: var(--fs-4xl);
  margin-bottom: var(--space-2);
}

.cta h2 .italic-accent {
  font-style: italic;
  color: var(--accent);
}

.cta p {
  color: var(--gray-400);
  max-width: 50ch;
  margin-top: var(--space-6);
  font-size: var(--fs-lg);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-8);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all var(--t);
}

.btn--primary {
  background: var(--accent);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--white);
}

.btn--ghost-dark {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}

.btn--ghost-dark:hover {
  background: var(--ink);
  color: var(--white);
}

/* ═══ FOOTER ═══ */
.footer {
  background: var(--ink);
  color: var(--gray-400);
  padding: var(--space-16) 0 var(--space-8);
  font-size: var(--fs-sm);
}

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: var(--space-8);
}

.footer__brand h3 {
  color: var(--white);
  font-size: var(--fs-lg);
  margin-bottom: var(--space-3);
}

.footer__brand p {
  color: var(--gray-400);
  font-size: var(--fs-sm);
  max-width: 30ch;
}

.footer__col h4 {
  color: var(--white);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.footer__col ul {
  list-style: none;
}

.footer__col li {
  margin-bottom: var(--space-2);
}

.footer__col a {
  color: var(--gray-400);
  font-size: var(--fs-sm);
  transition: color var(--t);
}

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

.footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-top: var(--space-4);
  font-size: var(--fs-xs);
  color: var(--gray-600);
}

.footer__bottom a {
  color: var(--gray-600);
  margin-left: var(--space-4);
}

.footer__bottom a:hover {
  color: var(--gray-400);
}

/* ═══ ANIMATIONS ═══ */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 600ms cubic-bezier(0.2, 0, 0.2, 1),
                transform 600ms cubic-bezier(0.2, 0, 0.2, 1);
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* Fallback: if JS doesn't run, content remains visible */
  .no-js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1024px) {
  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12);
  }

  .stats__grid--6 {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }

  .approach-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-12);
  }

  .partners {
    grid-template-columns: repeat(2, 1fr);
  }

  .partner:nth-child(4n) {
    border-right: var(--hairline);
  }

  .domain-card:nth-child(4n) {
    border-right: var(--hairline);
  }

  .domains-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .domain-card:nth-child(2n) {
    border-right: 0;
  }

  .timeline__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }

  .timeline::before {
    display: none;
  }

  .timeline__step::before {
    width: 12px;
    height: 2px;
    top: 0;
  }

  .references {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

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

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: var(--space-12) var(--gutter);
    gap: var(--space-6);
    transform: translateX(100%);
    transition: transform 300ms ease;
    border-top: var(--hairline);
  }

  .site-header--dark .nav {
    background: var(--black);
  }

  body.menu-open .nav {
    transform: translateX(0);
  }

  .nav a {
    font-size: var(--fs-2xl);
    font-weight: 600;
  }

  .lang-switch {
    margin-left: 0;
    margin-top: var(--space-8);
  }

  .stats__grid,
  .partners,
  .approach-grid,
  .domains-grid {
    grid-template-columns: 1fr;
  }

  .partner,
  .domain-card {
    border-right: 0 !important;
  }

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

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

  .footer__top {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .hero {
    min-height: 80vh;
  }

  .hero__meta {
    gap: var(--space-6);
  }
}

/* ═══ UTILITIES ═══ */
.text-accent { color: var(--accent); }
.text-muted { color: var(--gray-600); }
.text-white { color: var(--white); }
.italic { font-style: italic; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ═══════════════════════════════════════════
   MOTION — Page d'accueil animée (v2)
   ═══════════════════════════════════════════ */

/* Canvas particules (réseau "neurones") */
.hero__particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* Indicateur de scroll */
.hero__scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 1px;
  height: 56px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
}
.hero__scroll span {
  position: absolute;
  top: -40%;
  left: 0;
  width: 100%;
  height: 40%;
  background: var(--accent-light);
}

/* Header : fond renforcé au scroll */
.site-header {
  transition: background 300ms ease, border-color 300ms ease;
}
.site-header--dark.scrolled {
  background: var(--black);
}
.site-header.scrolled:not(.site-header--dark) {
  background: rgba(255, 255, 255, 0.95);
}

@media (prefers-reduced-motion: no-preference) {
  /* Ken Burns lent sur la photo hero */
  html.js .hero__bg {
    animation: kenburns 26s ease-out both;
  }
  @keyframes kenburns {
    from { transform: scale(1.07); }
    to   { transform: scale(1); }
  }

  /* Séquence d'entrée du hero */
  html.js .hero__eyebrow,
  html.js .hero h1,
  html.js .hero__sub,
  html.js .hero__meta {
    opacity: 0;
    transform: translateY(26px);
    animation: riseIn 900ms cubic-bezier(0.2, 0, 0.2, 1) forwards;
  }
  html.js .hero__eyebrow { animation-delay: 0.15s; }
  html.js .hero h1       { animation-delay: 0.30s; }
  html.js .hero__sub     { animation-delay: 0.52s; }
  html.js .hero__meta    { animation-delay: 0.72s; }
  @keyframes riseIn {
    to { opacity: 1; transform: translateY(0); }
  }

  /* Pulsation de l'indicateur de scroll */
  .hero__scroll span {
    animation: scrollHint 2.2s cubic-bezier(0.65, 0, 0.35, 1) infinite;
    animation-delay: 1.6s;
  }
  @keyframes scrollHint {
    0%        { top: -40%; }
    60%, 100% { top: 110%; }
  }

  /* Stagger : cartes domaines */
  html.js .domains-grid .domain-card {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 650ms cubic-bezier(0.2, 0, 0.2, 1),
                transform 650ms cubic-bezier(0.2, 0, 0.2, 1),
                background 200ms ease;
  }
  html.js .domains-grid.visible .domain-card {
    opacity: 1;
    transform: none;
  }
  html.js .domains-grid.visible .domain-card:hover {
    transform: translateY(-3px);
  }
  html.js .domains-grid.visible .domain-card:nth-child(1) { transition-delay: 0s; }
  html.js .domains-grid.visible .domain-card:nth-child(2) { transition-delay: 0.07s; }
  html.js .domains-grid.visible .domain-card:nth-child(3) { transition-delay: 0.14s; }
  html.js .domains-grid.visible .domain-card:nth-child(4) { transition-delay: 0.21s; }
  html.js .domains-grid.visible .domain-card:nth-child(5) { transition-delay: 0.28s; }
  html.js .domains-grid.visible .domain-card:nth-child(6) { transition-delay: 0.35s; }
  html.js .domains-grid.visible .domain-card:nth-child(7) { transition-delay: 0.42s; }

  /* Stagger : partenaires */
  html.js .partners .partner {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 600ms cubic-bezier(0.2, 0, 0.2, 1),
                transform 600ms cubic-bezier(0.2, 0, 0.2, 1),
                background 200ms ease;
  }
  html.js .partners.visible .partner {
    opacity: 1;
    transform: none;
  }
  html.js .partners.visible .partner:nth-child(1) { transition-delay: 0s; }
  html.js .partners.visible .partner:nth-child(2) { transition-delay: 0.06s; }
  html.js .partners.visible .partner:nth-child(3) { transition-delay: 0.12s; }
  html.js .partners.visible .partner:nth-child(4) { transition-delay: 0.18s; }
  html.js .partners.visible .partner:nth-child(5) { transition-delay: 0.24s; }
  html.js .partners.visible .partner:nth-child(6) { transition-delay: 0.30s; }
  html.js .partners.visible .partner:nth-child(7) { transition-delay: 0.36s; }
  html.js .partners.visible .partner:nth-child(8) { transition-delay: 0.42s; }

  /* Stagger : bande stats */
  html.js .stats__grid--6 .stat:nth-child(2) { transition-delay: 0.08s; }
  html.js .stats__grid--6 .stat:nth-child(3) { transition-delay: 0.16s; }
  html.js .stats__grid--6 .stat:nth-child(4) { transition-delay: 0.24s; }
  html.js .stats__grid--6 .stat:nth-child(5) { transition-delay: 0.32s; }
  html.js .stats__grid--6 .stat:nth-child(6) { transition-delay: 0.40s; }
}

@media (prefers-reduced-motion: reduce) {
  .hero__scroll { display: none; }
}