/*
  Digital Impulse — Feuille de styles principale
  L’identité (couleurs, tailles et espacements) se pilote depuis les variables ci-dessous.
*/

:root {
  --color-paper: #f4f2eb;
  --color-surface: #fffef9;
  --color-ink: #0a3534;
  --color-ink-deep: #062827;
  --color-accent: #0b7478;
  --color-accent-hover: #075e62;
  --color-soft: #e5f0ee;
  --color-line: #ccd9d5;
  --color-muted: #5f706d;
  --color-white: #ffffff;

  --font-display: "Helvetica Neue", "Avenir Next", Avenir, Helvetica, Arial, sans-serif;
  --font-body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 7rem;
  --space-9: 9rem;

  --container: 76rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --header-height: 5.25rem;
  --transition: 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-paper);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1.02;
}

h1 {
  max-width: 11ch;
  margin-bottom: var(--space-5);
  font-size: clamp(4rem, 9vw, 8.5rem);
  letter-spacing: -0.065em;
}

h2 {
  max-width: 14ch;
  margin-bottom: 0;
  font-size: clamp(2.5rem, 5vw, 5rem);
}

h3 {
  font-size: clamp(1.4rem, 2vw, 1.75rem);
}

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

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

.container {
  width: min(calc(100% - 3rem), var(--container));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-9);
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--color-white);
  background: var(--color-ink);
  transform: translateY(-180%);
  transition: transform var(--transition);
}

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

.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;
}

.eyebrow {
  margin-bottom: var(--space-5);
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow-light {
  color: #77d1cf;
}

/* Navigation */
.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  height: var(--header-height);
  background: rgba(244, 242, 235, 0.96);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition);
}

.site-header.is-scrolled {
  border-color: var(--color-line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 650;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  color: var(--color-white);
  background: var(--color-ink);
  border-radius: 50%;
  font-size: 0.57rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(1.3rem, 2.5vw, 2.5rem);
}

.main-nav > a:not(.button) {
  position: relative;
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
}

.main-nav > a:not(.button)::after {
  position: absolute;
  right: 0;
  bottom: -0.35rem;
  left: 0;
  height: 1px;
  background: var(--color-accent);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition);
}

.main-nav > a:not(.button):hover::after,
.main-nav > a:not(.button):focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0.75rem;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  cursor: pointer;
}

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 1px;
  margin-block: 0.3rem;
  background: currentColor;
  transition: transform var(--transition);
}

/* Boutons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1.8rem;
  min-height: 3.6rem;
  padding: 0.95rem 1.2rem 0.95rem 1.5rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transition: color var(--transition), background var(--transition), border-color var(--transition), transform var(--transition);
}

.button:hover {
  transform: translateY(-2px);
}

.button-small {
  min-height: 2.75rem;
  padding: 0.7rem 1.05rem;
  color: var(--color-white);
  background: var(--color-ink);
}

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

.button-primary:hover {
  background: var(--color-accent-hover);
}

.button-light {
  color: var(--color-ink);
  background: var(--color-white);
}

.button-light:hover {
  background: var(--color-soft);
}

.button-arrow {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 0.9rem;
}

/* Hero */
.hero {
  min-height: calc(100svh - var(--header-height));
  padding-block: clamp(4rem, 9vh, 7rem) 2rem;
  background-color: var(--color-paper);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(16rem, 0.56fr);
  gap: clamp(3rem, 7vw, 8rem);
  align-items: end;
}

.hero-content {
  position: relative;
}

.hero-lead {
  max-width: 35rem;
  margin-bottom: var(--space-5);
  color: #294d4a;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.1vw, 1.65rem);
  letter-spacing: -0.025em;
  line-height: 1.45;
}

.hero-principle {
  min-height: 22rem;
  padding: 1.5rem;
  color: var(--color-white);
  background: var(--color-ink);
  border-radius: var(--radius-md);
}

.hero-principle-label,
.hero-principle-note {
  color: #a9c3bf;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  line-height: 1.6;
  text-transform: uppercase;
}

.hero-principle-text {
  margin-block: 3.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.hero-path {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  justify-items: center;
  margin-bottom: 1.25rem;
}

.hero-path::before {
  position: absolute;
  top: 50%;
  right: 12.5%;
  left: 12.5%;
  height: 1px;
  background: rgba(119, 209, 207, 0.45);
  content: "";
}

.hero-path span {
  position: relative;
  z-index: 1;
  display: block;
  width: 0.6rem;
  height: 0.6rem;
  background: #77d1cf;
  border: 2px solid var(--color-ink);
  border-radius: 50%;
  outline: 1px solid #77d1cf;
}

.hero-bottom {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: clamp(3rem, 8vh, 6rem);
  color: var(--color-muted);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-bottom-line {
  flex: 1;
  height: 1px;
  background: var(--color-line);
}

/* En-têtes de section */
.section-intro {
  margin-bottom: var(--space-7);
}

.section-heading-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(16rem, 0.65fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: end;
}

.section-copy {
  max-width: 36rem;
  margin-bottom: 0.6rem;
  color: var(--color-muted);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

/* Vision */
.vision {
  background: var(--color-surface);
}

.business-goals {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-line);
  list-style: none;
}

.business-goals li {
  display: flex;
  min-height: 11rem;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.25rem;
  border-right: 1px solid var(--color-line);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 550;
  letter-spacing: -0.025em;
}

.business-goals li:first-child {
  border-left: 1px solid var(--color-line);
}

.goal-number,
.card-number,
.solution-step {
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.1em;
}

/* Méthode */
.method {
  color: var(--color-white);
  background: var(--color-ink-deep);
}

.method h2 {
  max-width: 13ch;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: method;
}

.method-card {
  position: relative;
  display: flex;
  min-height: 25rem;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.5rem;
  border: 1px solid #315451;
  border-right: 0;
}

.method-card:last-child {
  border-right: 1px solid #315451;
}

.method-card:not(:last-child)::after {
  position: absolute;
  z-index: 2;
  top: 2.1rem;
  right: -0.62rem;
  display: grid;
  width: 1.2rem;
  height: 1.2rem;
  place-items: center;
  color: var(--color-ink-deep);
  background: #77d1cf;
  border-radius: 50%;
  content: "→";
  font-size: 0.65rem;
}

.method-card h3 {
  margin-bottom: 1rem;
  color: var(--color-white);
}

.method-card p {
  margin-bottom: 0;
  color: #aec1be;
  font-size: 0.95rem;
}

.method-card .card-number {
  color: #77d1cf;
}

/* Solutions */
.solutions {
  background: var(--color-paper);
}

.solution-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.8rem;
  align-items: stretch;
}

.solution-card {
  min-height: 22rem;
  padding: 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), transform var(--transition);
}

.solution-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.solution-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  margin-bottom: 6rem;
  border-bottom: 1px solid var(--color-line);
}

.solution-keyword {
  color: var(--color-accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.solution-card h3 {
  margin-bottom: 1rem;
}

.solution-card p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.flow-arrow {
  display: grid;
  width: 2rem;
  place-items: center;
  color: var(--color-accent);
  font-size: 1.15rem;
}

/* Audit */
.audit {
  color: var(--color-white);
  background: var(--color-ink);
}

.audit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.7fr);
  gap: clamp(4rem, 10vw, 10rem);
}

.audit h2 {
  max-width: 13ch;
  margin-bottom: var(--space-5);
}

.audit-content > p:not(.eyebrow) {
  max-width: 35rem;
  margin-bottom: var(--space-5);
  color: #bed0cd;
  font-size: 1.05rem;
}

.audit-checkpoints {
  align-self: center;
}

.audit-question {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1rem;
  align-items: center;
  padding-block: 1.3rem;
  border-bottom: 1px solid #41625f;
}

.audit-question:first-child {
  border-top: 1px solid #41625f;
}

.audit-question span {
  color: #77d1cf;
  font-size: 0.67rem;
  font-weight: 800;
}

.audit-question p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  letter-spacing: -0.035em;
}

.audit-conclusion {
  margin: 2rem 0 0;
  color: #bed0cd;
  font-size: 0.9rem;
}

/* Contact */
.contact {
  background: var(--color-soft);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(18rem, 0.6fr);
  gap: clamp(3rem, 9vw, 10rem);
  align-items: end;
}

.contact-action p {
  margin-bottom: var(--space-5);
  color: var(--color-muted);
  font-size: 1.1rem;
}

/* Footer */
.site-footer {
  padding-top: var(--space-7);
  color: var(--color-white);
  background: var(--color-ink-deep);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1.2fr 1fr;
  gap: 2rem;
  padding-bottom: var(--space-7);
}

.brand-footer .brand-mark {
  color: var(--color-ink);
  background: #77d1cf;
}

.footer-brand p {
  margin: 1.5rem 0 0;
  color: #94aaa7;
  font-size: 0.86rem;
}

.footer-label {
  margin-bottom: 0.8rem;
  color: #77d1cf;
  font-size: 0.65rem;
  font-style: normal;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-item,
.footer-item a {
  color: #d5e1df;
  font-size: 0.88rem;
  font-style: normal;
  text-decoration: none;
}

.footer-item a:hover {
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.4rem;
  color: #94aaa7;
  border-top: 1px solid #315451;
  font-size: 0.72rem;
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  color: inherit;
  text-decoration: none;
}

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

/* Page Mentions légales */
.legal-main {
  min-height: 70vh;
  padding-block: var(--space-8) var(--space-9);
  background: var(--color-surface);
}

.legal-header {
  padding-bottom: var(--space-7);
  border-bottom: 1px solid var(--color-line);
}

.legal-header h1 {
  max-width: none;
  margin-bottom: 1.5rem;
  font-size: clamp(3.5rem, 8vw, 7.5rem);
}

.legal-header > p:not(.eyebrow) {
  max-width: 40rem;
  margin-bottom: 0;
  color: var(--color-muted);
}

.legal-grid {
  display: grid;
  grid-template-columns: 13rem minmax(0, 42rem);
  gap: clamp(2rem, 8vw, 8rem);
  padding-top: var(--space-7);
}

.legal-nav {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  align-self: start;
}

.legal-nav p {
  margin-bottom: 1rem;
  color: var(--color-accent);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.legal-nav a {
  display: block;
  padding-block: 0.35rem;
  color: var(--color-muted);
  font-size: 0.82rem;
  text-decoration: none;
}

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

.legal-content section {
  padding-bottom: var(--space-6);
  margin-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-line);
  scroll-margin-top: calc(var(--header-height) + 2rem);
}

.legal-content section:last-child {
  margin-bottom: 0;
}

.legal-content h2 {
  max-width: none;
  margin-bottom: 1.5rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.legal-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.legal-content p,
.legal-content li {
  color: #465c59;
  font-size: 0.95rem;
}

.legal-content a {
  color: var(--color-accent);
}

.placeholder {
  display: inline;
  padding: 0.12rem 0.35rem;
  color: #693f16;
  background: #f4e4c9;
  border-radius: 0.2rem;
  font-size: 0.83em;
  font-weight: 750;
  letter-spacing: 0.02em;
}

/* Apparition progressive : l’information reste visible sans JavaScript. */
.js .reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* Tablette */
@media (max-width: 62rem) {
  :root {
    --space-9: 7rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(14rem, 0.65fr);
    gap: 3rem;
  }

  .business-goals {
    grid-template-columns: repeat(3, 1fr);
  }

  .business-goals li:nth-child(4),
  .business-goals li:nth-child(5) {
    border-top: 1px solid var(--color-line);
  }

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

  .method-card {
    min-height: 19rem;
  }

  .method-card:nth-child(2) {
    border-right: 1px solid #315451;
  }

  .method-card:nth-child(3),
  .method-card:nth-child(4) {
    border-top: 0;
  }

  .method-card:nth-child(2)::after {
    display: none;
  }

  .solution-flow {
    grid-template-columns: 1fr;
  }

  .solution-card {
    min-height: auto;
  }

  .solution-topline {
    margin-bottom: 3rem;
  }

  .flow-arrow {
    width: auto;
    height: 2rem;
    transform: rotate(90deg);
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
  }
}

/* Mobile */
@media (max-width: 46rem) {
  :root {
    --header-height: 4.5rem;
    --space-7: 3.5rem;
    --space-8: 5rem;
    --space-9: 5.5rem;
  }

  .container {
    width: min(calc(100% - 2rem), var(--container));
  }

  h1 {
    font-size: clamp(3.45rem, 18vw, 5.5rem);
  }

  h2 {
    font-size: clamp(2.35rem, 11vw, 3.6rem);
  }

  .nav-toggle {
    display: block;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:first-of-type {
    transform: translateY(0.22rem) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-line:last-of-type {
    transform: translateY(-0.22rem) rotate(-45deg);
  }

  .main-nav {
    position: fixed;
    z-index: 90;
    inset: var(--header-height) 0 0;
    display: flex;
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
    padding: 2rem 1rem;
    background: var(--color-paper);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-0.75rem);
    transition: opacity var(--transition), transform var(--transition);
  }

  .main-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .main-nav > a:not(.button) {
    width: 100%;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--color-line);
    font-family: var(--font-display);
    font-size: 1.7rem;
    font-weight: 500;
    letter-spacing: -0.04em;
  }

  .main-nav .button {
    width: 100%;
    margin-top: 2rem;
  }

  .hero {
    min-height: auto;
    padding-block: 4rem 1.5rem;
  }

  .hero-grid,
  .section-heading-grid,
  .audit-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 3.5rem;
  }

  .hero-principle {
    min-height: auto;
  }

  .hero-principle-text {
    margin-block: 2.5rem;
  }

  .hero-bottom {
    gap: 0.55rem;
    margin-top: 3rem;
    font-size: 0.58rem;
    letter-spacing: 0.09em;
  }

  .section-heading-grid {
    gap: 2rem;
  }

  .business-goals {
    grid-template-columns: 1fr;
  }

  .business-goals li,
  .business-goals li:first-child {
    min-height: auto;
    flex-direction: row;
    justify-content: flex-start;
    padding: 1.25rem 0;
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
    border-left: 0;
  }

  .business-goals li:nth-child(4),
  .business-goals li:nth-child(5) {
    border-top: 0;
  }

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

  .method-card,
  .method-card:nth-child(2),
  .method-card:nth-child(3),
  .method-card:nth-child(4) {
    min-height: auto;
    gap: 3rem;
    padding: 1.4rem;
    border: 1px solid #315451;
    border-bottom: 0;
  }

  .method-card:last-child {
    border-bottom: 1px solid #315451;
  }

  .method-card:not(:last-child)::after {
    top: auto;
    right: 1.35rem;
    bottom: -0.62rem;
    display: grid;
    content: "↓";
  }

  .solution-card {
    padding: 1.4rem;
  }

  .solution-topline {
    margin-bottom: 2.5rem;
  }

  .audit-grid,
  .contact-grid {
    gap: 3.5rem;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .legal-main {
    padding-top: var(--space-7);
  }

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

  .legal-nav {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 1rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-line);
  }

  .legal-nav p {
    grid-column: 1 / -1;
  }
}

/* Les animations sont désactivées pour les personnes qui le demandent. */
@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;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}