:root {
  color-scheme: light;
  --ink: oklch(16% 0.025 258);
  --paper: oklch(97% 0.017 116);
  --panel: oklch(94% 0.025 116);
  --muted: oklch(43% 0.03 258);
  --line: oklch(73% 0.035 116);
  --cyan: oklch(76% 0.145 205);
  --coral: oklch(70% 0.18 33);
  --violet: oklch(59% 0.17 303);
  --leaf: oklch(76% 0.16 142);
  --sun: oklch(86% 0.14 86);
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 4%, oklch(76% 0.145 205 / 0.36), transparent 22rem),
    radial-gradient(circle at 88% 22%, oklch(70% 0.18 33 / 0.22), transparent 24rem),
    linear-gradient(180deg, var(--paper), oklch(93% 0.03 116));
  font-family: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 20px;
  line-height: 1.55;
  letter-spacing: 0;
  overflow-x: hidden;
}

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

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

p {
  max-width: 72ch;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 clamp(18px, 3vw, 42px);
  border-bottom: 1px solid var(--ink);
  background: oklch(97% 0.017 116 / 0.91);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
}

.brand span {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  background: conic-gradient(from 90deg, var(--cyan), var(--violet), var(--coral), var(--leaf), var(--cyan));
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-size: 0.82rem;
  box-shadow: inset 0 0 0 8px oklch(97% 0.017 116 / 0.72);
}

nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 800;
}

nav a {
  padding: 8px 10px;
  border: 1px solid transparent;
}

nav a:hover {
  border-color: var(--ink);
  background: var(--sun);
}

.hero {
  width: min(var(--max), calc(100% - 36px));
  min-height: auto;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.78fr);
  grid-template-areas:
    "head form"
    "rest form"
    "board board";
  gap: clamp(24px, 4vw, 52px) clamp(36px, 6vw, 84px);
  align-items: start;
  padding: clamp(48px, 7vw, 88px) 0 clamp(44px, 6vw, 76px);
}

.hero-head {
  grid-area: head;
}

.hero-rest {
  grid-area: rest;
}

.hero-form {
  grid-area: form;
  align-self: start;
}

.signal-board {
  grid-area: board;
  margin-top: clamp(16px, 3vw, 30px);
}

.callout,
.section-kicker {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  margin-bottom: 18px;
  padding: 7px 12px;
  border: 1px solid var(--ink);
  background: var(--sun);
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: clamp(2.6rem, 5vw, 4.4rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

h2 {
  max-width: 940px;
  margin-bottom: 22px;
  font-size: clamp(2.3rem, 4.6vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 10px;
  font-size: clamp(1.35rem, 2vw, 2rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

.lead,
.definition p,
.measure-intro p,
.service-copy p,
.contact-intro p {
  color: var(--muted);
  font-size: clamp(1.05rem, 1.45vw, 1.32rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary,
.secondary {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 13px 18px;
  border: 1px solid var(--ink);
  font-weight: 900;
  text-align: center;
}

.primary {
  background: var(--ink);
  color: var(--paper);
}

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

.primary:hover,
.secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 0 oklch(16% 0.025 258 / 0.16);
}

/* ---- Carte formulaire (hero + section contact) ---- */
.lead-card {
  border: 1px solid var(--ink);
  background: var(--panel);
  box-shadow: 14px 14px 0 oklch(16% 0.025 258 / 0.15);
  padding: clamp(20px, 3vw, 30px);
}

.lead-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.lead-card-head b {
  background: var(--cyan);
  border: 1px solid var(--ink);
  padding: 4px 9px;
}

.lead-card-title {
  margin-bottom: 8px;
  max-width: none;
  font-size: clamp(1.4rem, 2.4vw, 1.95rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.lead-card-sub {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.98rem;
}

.lead-form {
  display: grid;
  gap: 10px;
}

.lead-form input,
.lead-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-family: inherit;
  font-size: 1rem;
}

.lead-form textarea {
  resize: vertical;
  min-height: 84px;
}

.lead-form input:focus,
.lead-form textarea:focus {
  outline: 3px solid var(--cyan);
  outline-offset: 0;
}

.lead-submit {
  min-height: 52px;
  padding: 13px 18px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  font-family: inherit;
  font-weight: 900;
  cursor: pointer;
}

.lead-submit:hover {
  background: var(--sun);
  color: var(--ink);
}

.lead-success {
  margin: 6px 0 0;
  padding: 12px 14px;
  background: var(--leaf);
  border: 1px solid var(--ink);
  font-weight: 900;
}

.signal-board {
  position: relative;
  min-height: 480px;
  display: grid;
  align-content: stretch;
  border: 1px solid var(--ink);
  background:
    repeating-linear-gradient(0deg, transparent 0 38px, oklch(16% 0.025 258 / 0.08) 38px 39px),
    linear-gradient(135deg, oklch(98% 0.012 116), oklch(90% 0.032 116));
  box-shadow: 18px 18px 0 oklch(16% 0.025 258 / 0.15);
  overflow: hidden;
}

.signal-board::before {
  content: "";
  position: absolute;
  inset: 92px -12% auto;
  height: 230px;
  background:
    radial-gradient(ellipse at 10% 55%, transparent 0 44%, var(--violet) 45% 46%, transparent 47%),
    radial-gradient(ellipse at 36% 52%, transparent 0 43%, var(--coral) 44% 45%, transparent 46%),
    radial-gradient(ellipse at 64% 55%, transparent 0 44%, var(--cyan) 45% 46%, transparent 47%),
    radial-gradient(ellipse at 90% 50%, transparent 0 43%, var(--leaf) 44% 45%, transparent 46%);
  opacity: 0.58;
  transform: rotate(-4deg);
}

.board-head,
.board-foot {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--ink);
  font-size: 0.84rem;
  font-weight: 900;
  text-transform: uppercase;
}

.board-head strong {
  font-size: 1.25rem;
}

.signal-row {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(145px, 0.72fr) minmax(140px, 1fr) minmax(84px, auto);
  gap: 16px;
  align-items: center;
  min-height: 92px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--ink);
}

.signal-row span,
.signal-row b {
  font-weight: 900;
}

.signal-row span {
  font-size: 0.92rem;
}

.signal-row i {
  display: block;
  height: 18px;
  border: 1px solid var(--ink);
  background:
    linear-gradient(90deg, var(--ink) 0 var(--fill), transparent var(--fill) 100%),
    repeating-linear-gradient(90deg, transparent 0 18px, oklch(16% 0.025 258 / 0.2) 18px 19px);
}

.signal-row b {
  text-align: right;
  font-size: 1.2rem;
}

.voice { --fill: 62%; }
.voice i { background-color: var(--cyan); }
.citation { --fill: 38%; }
.citation i { background-color: var(--coral); }
.model { --fill: 82%; }
.model i { background-color: var(--violet); }
.diversity { --fill: 55%; }
.diversity i { background-color: var(--leaf); }

.board-foot {
  margin-top: auto;
  border-top: 1px solid var(--ink);
  border-bottom: 0;
  background: var(--ink);
  color: var(--paper);
}

.definition,
.measure,
.tools,
.service,
.fit,
.faq,
.contact,
.legal {
  width: min(var(--max), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(58px, 8vw, 112px) 0;
}

.definition {
  border-top: 1px solid var(--ink);
}

.definition p:not(.section-kicker) + p {
  margin-top: 18px;
}

.measure {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 78px);
  align-items: start;
  border-top: 1px solid var(--ink);
}

.measure-intro {
  position: sticky;
  top: 100px;
}

.metric-table {
  border-top: 1px solid var(--ink);
}

.metric-table article {
  display: grid;
  grid-template-columns: 74px minmax(180px, 0.64fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  min-height: 146px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ink);
}

.metric-table span {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-weight: 900;
}

.metric-table p {
  margin-bottom: 0;
  color: var(--muted);
}

.tools {
  display: grid;
  grid-template-columns: minmax(280px, 430px) minmax(0, 1fr);
  gap: clamp(30px, 6vw, 82px);
  border-top: 1px solid var(--ink);
}

.tool-ribbon {
  display: grid;
  border: 1px solid var(--ink);
  background: var(--panel);
}

.tool-ribbon div {
  display: grid;
  grid-template-columns: minmax(130px, 0.36fr) minmax(0, 1fr);
  gap: 18px;
  padding: 20px;
  border-bottom: 1px solid var(--ink);
}

.tool-ribbon div:last-child {
  border-bottom: 0;
}

.tool-ribbon b {
  font-size: 1.08rem;
}

.tool-ribbon span {
  color: var(--muted);
}

.service {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(330px, 0.8fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
  border-top: 1px solid var(--ink);
}

.service-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--ink);
  background: oklch(98% 0.012 116);
}

.service-steps li {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  border-bottom: 1px solid var(--ink);
}

.service-steps li:last-child {
  border-bottom: 0;
}

.service-steps span {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid var(--ink);
  background: var(--sun);
  font-weight: 900;
}

.service-steps b {
  font-size: 1.18rem;
}

.service-steps p {
  grid-column: 2;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.fit {
  border-top: 1px solid var(--ink);
}

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

.fit-lines p {
  max-width: none;
  min-height: 160px;
  margin: 0;
  padding: clamp(20px, 3vw, 34px);
  background: var(--paper);
  color: var(--muted);
}

.fit-lines b {
  display: block;
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 1.35rem;
}

.faq {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(0, 1fr);
  gap: clamp(30px, 6vw, 82px);
  border-top: 1px solid var(--ink);
}

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

details {
  border-bottom: 1px solid var(--ink);
  padding: 22px 0;
}

summary {
  cursor: pointer;
  font-size: 1.18rem;
  font-weight: 900;
}

details p {
  margin: 16px 0 0;
  color: var(--muted);
}

/* ---- Section contact (formulaire on-page) ---- */
.contact {
  display: grid;
  grid-template-columns: minmax(280px, 0.85fr) minmax(330px, 1fr);
  gap: clamp(30px, 6vw, 72px);
  align-items: start;
  border-top: 1px solid var(--ink);
  margin-bottom: clamp(34px, 6vw, 58px);
}

footer {
  width: min(var(--max), calc(100% - 36px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-size: 0.95rem;
}

footer a {
  color: var(--ink);
  font-weight: 900;
}

/* ---- Pages legales (mentions / confidentialite) ---- */
.legal {
  width: min(820px, calc(100% - 36px));
  min-height: calc(100vh - 150px);
}

.legal h1 {
  max-width: none;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
}

.legal h2 {
  margin-top: 38px;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
}

.legal p,
.legal li {
  color: var(--muted);
  max-width: none;
}

.legal ul {
  margin: 0 0 16px 22px;
}

.legal a.inline {
  font-weight: 900;
  text-decoration: underline;
}

/* ---- Menu hamburger (≤ 860px) ---- */
.nav-toggle {
  display: none;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    margin-left: auto;
    padding: 0;
    border: 1px solid var(--ink);
    background: transparent;
    cursor: pointer;
    flex-shrink: 0;
  }

  .nav-toggle:hover {
    background: var(--sun);
  }

  /* Icône 3 barres → croix via CSS */
  .nav-toggle-icon {
    position: relative;
    width: 22px;
    height: 2px;
    background: var(--ink);
    transition: background 0.15s;
  }

  .nav-toggle-icon::before,
  .nav-toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
    width: 22px;
    height: 2px;
    background: var(--ink);
    transition: transform 0.2s, top 0.2s, bottom 0.2s;
  }

  .nav-toggle-icon::before { top: -7px; }
  .nav-toggle-icon::after  { bottom: -7px; }

  /* État ouvert → croix */
  .nav-toggle[aria-expanded="true"] .nav-toggle-icon {
    background: transparent;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    top: 0;
    transform: rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    bottom: 0;
    transform: rotate(-45deg);
  }

  /* Nav masquée par défaut en mobile */
  .topbar nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: oklch(97% 0.017 116 / 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--ink);
    z-index: 29;
    padding: 8px 0;
  }

  .topbar nav[data-open] {
    display: flex;
  }

  .topbar nav a {
    padding: 14px clamp(18px, 3vw, 42px);
    border: 0;
    border-bottom: 1px solid var(--line);
    font-size: 1.05rem;
    font-weight: 800;
  }

  .topbar nav a:last-child {
    border-bottom: 0;
  }

  .topbar nav a:hover {
    background: var(--sun);
    border-color: var(--line);
  }

  /* Topbar en flex pour aligner brand + hamburger */
  .topbar {
    position: sticky;
    display: flex;
    justify-content: space-between;
    flex-wrap: nowrap;
  }
}

@media (max-width: 980px) {
  .hero,
  .measure,
  .tools,
  .service,
  .faq,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    grid-template-areas:
      "head"
      "form"
      "rest"
      "board";
  }

  .measure-intro {
    position: static;
  }

  .signal-board {
    min-height: 480px;
  }

  .metric-table article {
    grid-template-columns: 62px minmax(0, 1fr);
  }

  .metric-table p {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 18px;
  }

  /* Le topbar reste en flex avec hamburger (géré par ≤ 860px) */
  .topbar {
    padding: 12px 16px;
  }

  .hero,
  .definition,
  .measure,
  .tools,
  .service,
  .fit,
  .faq,
  .contact,
  .legal,
  footer {
    width: min(100% - 22px, 520px);
  }

  /* Mobile form-first : H1 puis formulaire juste en dessous. */
  .hero {
    min-height: auto;
    padding: 32px 0 56px;
    grid-template-areas:
      "head"
      "form"
      "rest"
      "board";
  }

  h1 {
    font-size: clamp(2.2rem, 11vw, 2.6rem);
    line-height: 0.98;
    letter-spacing: -0.035em;
  }

  h2 {
    font-size: clamp(2.1rem, 10vw, 3.4rem);
  }

  .primary,
  .secondary,
  .lead-submit {
    width: 100%;
  }

  .signal-row,
  .tool-ribbon div,
  .service-steps li,
  .fit-lines,
  .faq {
    grid-template-columns: 1fr;
  }

  .signal-row b {
    text-align: left;
  }

  .service-steps p {
    grid-column: auto;
  }

  .fit-lines p {
    min-height: auto;
  }
}