:root {
  --ink: #102233;
  --muted: #536879;
  --paper: #f6f8fa;
  --paper-strong: #fbfcfd;
  --blue-deep: #123a63;
  --blue: #1e7fb8;
  --blue-soft: #dcecf5;
  --blue-pale: #eef6fa;
  --ochre: #c9873a;
  --line: rgba(16, 34, 51, 0.14);
  --shadow: 0 24px 70px rgba(16, 34, 51, 0.12);
  --header-height: 3.8rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  scroll-snap-type: y mandatory;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(30, 127, 184, 0.16), transparent 34rem),
    radial-gradient(circle at 80% 20%, rgba(18, 58, 99, 0.1), transparent 26rem),
    linear-gradient(180deg, var(--paper-strong), var(--paper));
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-height);
  padding: 0.55rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 248, 250, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 2.35rem;
  height: 2.35rem;
  place-items: center;
  border-radius: 999px;
  color: var(--paper-strong);
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}

.brand-name {
  font-size: 1.02rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--blue-deep);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.85rem;
  color: var(--blue-deep);
  background: transparent;
  font: inherit;
}

.section-shell {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: min(1280px, calc(100% - 2rem));
  margin: 0 auto;
  height: 100svh;
  padding: clamp(1.4rem, 3vw, 2.6rem) 0;
  overflow: hidden;
  scroll-margin-top: 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.approach {
  overflow-y: auto;
}

.hero {
  position: relative;
  min-height: 100svh;
}

.hero-bg {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 75vh;
  height: 75vh;
  transform: translate(-50%, -50%);
  background: url("pile-livres.png") center/contain no-repeat;
  opacity: 0.28;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
  gap: clamp(1.5rem, 4vw, 3.8rem);
  align-items: start;
  width: 100%;
  height: 100%;
  padding: clamp(1.4rem, 3vw, 2.6rem) 0;
}

.hero-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - var(--header-height) - 5rem);
}

.hero-right {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.hero-right .three-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  margin-top: 0.5rem;
}

.hero-right .card-grid article {
  border-radius: 50%;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0.4rem;
  overflow: visible;
  min-width: 0;
  width: auto;
}

.hero-right .card-grid article h3 {
  font-size: 0.82rem;
  margin-bottom: 0.2rem;
  line-height: 1.15;
}

.hero-right .card-grid article p {
  font-size: 0.72rem;
  margin-bottom: 0;
  line-height: 1.25;
}

.hero-right .card-grid article p {
  font-size: 0.65rem;
  margin-bottom: 0;
  line-height: 1.2;
}

.hero-right .three-columns article:last-child:nth-child(odd) {
  grid-column: auto;
  max-width: none;
  justify-self: auto;
}

.hero-right .card-grid article:nth-child(3) {
  background: rgba(220, 236, 245, 0.45);
}

.hero-right .card-grid article:nth-child(4) {
  background: rgba(251, 252, 253, 0.68);
}

.frontier-intro {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 22ch;
  margin-bottom: 1.3rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.85rem, 3.6vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.05em;
}

h2 {
  margin-bottom: 1rem;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.55rem, 2.7vw, 2.35rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 0.45rem;
  font-size: 1rem;
}

p,
li {
  color: var(--muted);
  line-height: 1.5;
}

ul {
  margin-top: 0;
  padding-left: 1.15rem;
}

.hero-text {
  max-width: 44rem;
  color: var(--ink);
  font-size: clamp(1rem, 1.45vw, 1.16rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.35rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.15rem;
  border: 1px solid var(--blue-deep);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 850;
}

.button.primary {
  color: var(--paper-strong);
  background: var(--blue-deep);
}

.button.secondary {
  color: var(--blue-deep);
  background: transparent;
}

.hero-card,
.plain-card,
.contact-card,
.manifesto-panel,
.note-box {
  border: 1px solid var(--line);
  border-radius: 2rem;
  background: rgba(251, 252, 253, 0.78);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: clamp(1.25rem, 3vw, 1.8rem);
  transform: rotate(1.1deg);
}

.hero-card h2 {
  font-size: clamp(1.55rem, 2.4vw, 2.1rem);
}

.card-label {
  color: var(--blue-deep);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-card ul,
.principle-list {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.hero-card li,
.principle-list li {
  position: relative;
  padding-left: 1.6rem;
}

.hero-card li::before,
.principle-list li::before {
  position: absolute;
  left: 0;
  color: var(--blue);
  content: "•";
}

.problem,
.frontiers,
.offer,
.founder,
.audience {
  border-top: 1px solid var(--line);
}

.audience {
  position: relative;
}

.audience::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 75vh;
  height: 75vh;
  transform: translate(-50%, -50%);
  background: url("ronde-bg.jpg") center/contain no-repeat;
  opacity: 0.1;
  pointer-events: none;
  z-index: 0;
}

.audience > * {
  position: relative;
  z-index: 1;
}

.frontiers {
  position: relative;
}

.frontiers::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60vh;
  height: 60vh;
  transform: translate(-50%, -50%);
  background: url("main-de-dieu.jpg") center/contain no-repeat;
  opacity: 0.12;
  pointer-events: none;
  z-index: 0;
}

.frontiers > * {
  position: relative;
  z-index: 1;
}

.offer {
  position: relative;
}

.offer::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 62vh;
  height: 62vh;
  transform: translate(-50%, -50%);
  background: url("main-de-dieu.jpg") center/contain no-repeat;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

.offer > * {
  position: relative;
  z-index: 1;
}

.problem {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-content: center;
  align-items: center;
  position: relative;
}

.problem::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 72vh;
  height: 72vh;
  transform: translate(-50%, -50%);
  background: url("hiker-bg.svg") center/contain no-repeat;
  pointer-events: none;
  z-index: 0;
}

.problem > * {
  position: relative;
  z-index: 1;
}

.text-stack {
  display: grid;
  gap: 0.45rem;
}

.text-stack p {
  margin-bottom: 0;
}

.standout {
  color: var(--ink);
  font-size: 1rem;
}

.section-heading {
  max-width: 50rem;
  margin-bottom: 1.2rem;
}

.section-heading.narrow {
  max-width: 58rem;
  text-align: center;
  margin-right: auto;
  margin-left: auto;
}

.card-grid {
  display: grid;
  gap: 0.75rem;
}

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

.card-grid article,
.audience-grid div,
.persona-card {
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  padding: 0.85rem;
  background: rgba(251, 252, 253, 0.68);
}

.card-grid article:nth-child(even) {
  background: rgba(220, 236, 245, 0.45);
}

.persona-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  max-width: 44rem;
  margin: 0.5rem auto 1.5rem;
}

.persona-card {
  text-align: center;
  padding: 1rem;
  background: var(--blue-soft);
}

.persona-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  color: var(--paper-strong);
  background: var(--blue-deep);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.persona-card p {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 0.95rem;
}

.offer-heading {
  max-width: 90rem;
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.card-grid {
  display: grid;
  gap: 0.5rem;
}

.card-grid article,
.audience-grid div {
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  padding: 0.65rem;
  background: rgba(251, 252, 253, 0.68);
}

.closing-line {
  max-width: 52rem;
  margin: 1.2rem auto 0;
  color: var(--ink);
  font-size: 1rem;
  text-align: center;
}

.split {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 1.5rem;
}

.plain-card {
  padding: clamp(1.5rem, 4vw, 2rem);
}

.approach-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: start;
}

.approach {
  overflow-y: auto;
  padding-top: clamp(0.8rem, 2vw, 1.6rem);
  position: relative;
}

.approach::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50vh;
  height: 50vh;
  transform: translate(-50%, -50%);
  background: url("gear-bg.svg") center/contain no-repeat;
  pointer-events: none;
  z-index: 0;
}

.approach > * {
  position: relative;
  z-index: 1;
}

.approach .section-heading {
  margin-bottom: 0.5rem;
}

.prism-title {
  color: var(--blue-deep);
  font-size: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.approach-org {
  background: none;
}

.approach-org > h3 {
  color: var(--blue-deep);
  font-size: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
}

.approach-org > div {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  align-items: start;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line);
}

.approach-org > div:last-child {
  border-bottom: none;
}

.approach-org span {
  color: var(--blue);
  font-weight: 900;
  font-size: 0.96rem;
}

.approach-org p {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 0.96rem;
}

.approach-org strong {
  color: var(--blue-deep);
}

.principles {
  display: grid;
  gap: 1rem;
}

.five-steps {
  max-width: 58rem;
}

.principles div {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem;
  align-items: start;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line);
}

.principles span {
  color: var(--blue);
  font-weight: 900;
}

.principles p {
  margin-bottom: 0;
  color: var(--ink);
  font-size: 0.96rem;
}

.principles strong {
  color: var(--blue-deep);
}

.note-box {
  max-width: 58rem;
  margin: 1.2rem auto 0;
  padding: 0.95rem 1.1rem;
  color: var(--muted);
  box-shadow: none;
}

.manifesto {
  width: min(1280px, calc(100% - 2rem));
}

.manifesto-panel {
  max-height: calc(100svh - 2.8rem);
  overflow: hidden;
  padding: clamp(1.1rem, 2.4vw, 1.8rem);
  background:
    linear-gradient(135deg, rgba(18, 58, 99, 0.96), rgba(30, 127, 184, 0.9)),
    var(--blue-deep);
}

.manifesto-panel h2,
.manifesto-panel p,
.manifesto-panel li {
  color: var(--paper-strong);
}

.manifesto-panel .eyebrow {
  color: var(--blue-soft);
}

.manifesto-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.4rem;
  align-items: start;
  margin-top: 0.6rem;
}

.manifesto-text {
  display: grid;
  gap: 0.45rem;
}

.manifesto-text p {
  break-inside: avoid;
}

.manifesto-final {
  margin: 0.8rem 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.55rem, 2.4vw, 2.1rem);
  line-height: 1.05;
  text-align: center;
}

.principle-list {
  grid-template-columns: 1fr;
  margin-top: 0;
  padding-top: 0;
  border-top: none;
  gap: 1.1rem;
  font-weight: 800;
}

.principle-list li::before {
  color: var(--blue-soft);
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.audience-grid ul {
  margin-bottom: 0;
}

.contact-card {
  max-width: 52rem;
  margin: 0 auto;
  padding: clamp(1.35rem, 4vw, 2.4rem);
  text-align: center;
}

.contact-questions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.55rem 1rem;
  margin: 1rem 0 1.25rem;
  padding: 0;
  list-style: none;
  counter-reset: question;
  text-align: left;
}

.contact-questions li {
  position: relative;
  min-height: 2.5rem;
  padding-left: 2.1rem;
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.35;
}

.contact-questions li::before {
  position: absolute;
  top: 0.05rem;
  left: 0;
  display: grid;
  width: 1.45rem;
  height: 1.45rem;
  place-items: center;
  border-radius: 999px;
  color: var(--paper-strong);
  background: var(--blue-deep);
  content: counter(question);
  counter-increment: question;
  font-size: 0.75rem;
  font-weight: 850;
}

.small-note {
  margin: 1rem 0 0;
  font-size: 0.9rem;
}

.site-footer {
  padding: 2rem clamp(1rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
}

.site-footer p {
  max-width: 58rem;
  margin: 0;
  font-size: 0.95rem;
}

@media (max-width: 900px) {
  .three-columns {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 1.2rem;
    background: var(--paper-strong);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .hero-inner,
  .problem,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-left {
    min-height: auto;
    padding-top: 1rem;
  }

  .hero-right .three-columns {
    grid-template-columns: 1fr;

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

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

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

  .hero-card {
    transform: none;
  }

  .three-columns,
  .audience-grid,
  .persona-grid,
  .principle-list,
  .contact-questions {
    grid-template-columns: 1fr;
  }
}

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

  .section-shell,
  .manifesto {
    width: min(100% - 1.1rem, 1120px);
  }

  h1 {
    font-size: clamp(2.45rem, 13vw, 3.35rem);
  }

  .button {
    width: 100%;
  }

  .principles div {
    grid-template-columns: 1fr;
  }
}