:root {
  --concept-navy: #1c3144;
  --concept-light: #ebf2f7;
  --concept-gold: #eec13f;
  --concept-gold-dark: #8a6200;
  --concept-text: #23384a;
  --concept-muted: #5f7282;
  --concept-white: #ffffff;
  --concept-border: #d5e0e8;
  --concept-shadow: 0 10px 28px rgba(28, 49, 68, 0.08);
}

* {
  box-sizing: border-box;
}

.concept-page {
  margin: 0;
  background: var(--concept-white);
  color: var(--concept-text);
  font-family: "Lato", sans-serif;
}

.concept-page p {
  line-height: 1.65;
}

.concept-page .concept-section h2,
.concept-page .concept-section h3,
.concept-page .concept-cta h2 {
  color: var(--concept-navy);
  font-family: "Poppins", sans-serif;
}

/* Héros : le composant commun reste la référence. */
.concept-hero {
  overflow: hidden;
  background: var(--color-primary, var(--concept-navy));
}

.concept-hero__inner {
  grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
}

.concept-page .site-hero__title {
  color: var(--color-surface, var(--concept-white));
}

.concept-hero__mascot img {
  width: min(100%, 280px);
  max-height: 330px;
  object-fit: contain;
}

/* Éléments éditoriaux communs. */
.concept-kicker {
  margin: 0 0 10px;
  color: var(--concept-gold-dark);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.concept-section {
  padding-block: clamp(56px, 7vw, 88px);
}

.concept-section--tinted {
  background: var(--concept-light);
}

.concept-section h2,
.concept-cta h2 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  line-height: 1.18;
  text-wrap: balance;
}

.concept-story,
.concept-selection,
.concept-independent {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(36px, 7vw, 88px);
  align-items: start;
}

.concept-story__text p,
.concept-independent p,
.concept-founder__content p {
  margin: 0 0 18px;
  font-size: 1.05rem;
}

.concept-story__text p:last-child,
.concept-independent p:last-child,
.concept-founder__content p:last-child {
  margin-bottom: 0;
}

.concept-section__heading {
  max-width: 760px;
  margin: 0 auto clamp(30px, 5vw, 42px);
  text-align: center;
}

.concept-section__heading > p:last-child {
  margin: 16px auto 0;
  color: var(--concept-muted);
  font-size: 1.05rem;
}

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

.concept-section--tinted > .container > .concept-actions {
  justify-content: center;
}

/* Cartes visiteurs et prestataires. */
.concept-values {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.concept-value {
  height: 100%;
  padding: 26px;
  border: 1px solid var(--concept-border);
  border-radius: 18px;
  background: var(--concept-white);
  box-shadow: var(--concept-shadow);
}

.concept-value__icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(238, 193, 63, 0.22);
  color: var(--concept-navy);
  font-size: 1.2rem;
}

.concept-value h3 {
  margin: 18px 0 8px;
  font-size: 1.1rem;
  line-height: 1.35;
}

.concept-value p {
  margin: 0;
  color: var(--concept-muted);
}

/* Critères de référencement. */
.concept-section--tinted .concept-selection {
  margin-top: clamp(44px, 6vw, 68px);
  padding-top: clamp(36px, 5vw, 52px);
  border-top: 1px solid var(--concept-border);
}

.concept-selection__intro > p:last-child {
  margin: 16px 0 0;
  color: var(--concept-muted);
}

.concept-selection__intro h3 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.25;
}

.concept-checklist {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.concept-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 15px 17px;
  border: 1px solid var(--concept-border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
}

.concept-checklist i {
  width: 25px;
  height: 25px;
  flex: 0 0 25px;
  display: grid;
  place-items: center;
  margin-top: 1px;
  border-radius: 50%;
  background: var(--concept-gold);
  color: var(--concept-navy);
  font-size: 0.72rem;
}
.concept-criteria-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    color: var(--concept-navy);
    font-weight: 700;
    text-decoration: none;
}

.concept-criteria-link i {
    color: var(--concept-gold-dark);
    transition: transform 160ms ease;
}

.concept-criteria-link:hover span {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.concept-criteria-link:hover i {
    transform: translateX(4px);
}

.concept-criteria-link:focus-visible {
    outline: 3px solid var(--concept-gold);
    outline-offset: 4px;
    border-radius: 6px;
}

/* Outil pour les hébergeurs. */
.concept-host {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: center;
  gap: clamp(36px, 6vw, 72px);
}

.concept-host__content,
.concept-host__visual {
  min-width: 0;
}

.concept-host__content > p:not(.concept-kicker) {
  margin: 16px 0 0;
  font-size: 1.03rem;
}

.concept-host__checklist {
  margin-top: 24px;
}

.concept-host__visual {
  margin: 0;
}

.concept-host__visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--concept-border);
  border-radius: 18px;
  box-shadow: var(--concept-shadow);
}

.concept-host__visual figcaption {
  margin-top: 10px;
  color: var(--concept-muted);
  font-size: 0.88rem;
  line-height: 1.5;
  text-align: center;
}

/* Transparence du financement. */
.concept-section--independent {
  padding-top: 0;
  background: var(--concept-white);
}

.concept-independent {
  padding: clamp(30px, 5vw, 54px);
  border-radius: 22px;
  background: var(--concept-navy);
  box-shadow: var(--concept-shadow);
}

.concept-page .concept-independent h2,
.concept-independent p {
  color: var(--concept-white);
}

.concept-independent .concept-kicker--light {
  color: var(--concept-gold);
}

/* Chronologie. */
.concept-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: clamp(36px, 5vw, 52px);
}

.concept-timeline::before {
  position: absolute;
  top: 19px;
  right: 8%;
  left: 8%;
  height: 2px;
  background: var(--concept-border);
  content: "";
}

.concept-timeline__item {
  position: relative;
  z-index: 1;
  padding: 58px 22px 24px;
  border: 1px solid var(--concept-border);
  border-radius: 16px;
  background: var(--concept-white);
  box-shadow: 0 8px 22px rgba(28, 49, 68, 0.06);
}

.concept-timeline__year {
  position: absolute;
  top: 0;
  left: 22px;
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  padding-inline: 14px;
  border-radius: 0 0 12px 12px;
  background: var(--concept-gold);
  color: var(--concept-navy);
  font-family: "Poppins", sans-serif;
  font-size: 0.88rem;
  font-weight: 800;
}

.concept-timeline__item h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.35;
}

.concept-timeline__item p {
  margin: 0;
  color: var(--concept-muted);
  font-size: 0.95rem;
}
.concept-timeline__item:last-child {
    grid-column: 2 / 4;
    background: var(--concept-light);
    border-color: #c9d8e2;
}

/* Fondateur et appel final. */
.concept-founder {
  max-width: 920px;
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr);
  gap: clamp(24px, 5vw, 48px);
  align-items: start;
}

.concept-founder__mark {
  width: 104px;
  height: 104px;
  display: grid;
  place-items: center;
  border: 7px solid var(--concept-light);
  border-radius: 50%;
  background: var(--concept-gold);
  color: var(--concept-navy);
  font-family: "Poppins", sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
}

.concept-founder h2 {
  margin-bottom: 18px;
}
.concept-founder__linkedin {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    margin-top: 22px;
    color: var(--concept-navy);
    font-weight: 700;
    text-decoration: none;
}

.concept-founder__linkedin i {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 10px;
    background: var(--concept-navy);
    color: var(--concept-white);
}

.concept-founder__linkedin:hover span {
    text-decoration: underline;
    text-underline-offset: 4px;
}

.concept-founder__linkedin:focus-visible {
    outline: 3px solid var(--concept-gold);
    outline-offset: 4px;
    border-radius: 8px;
}

.concept-cta {
  padding-block: clamp(48px, 7vw, 72px);
  background: var(--concept-light);
}

.concept-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.concept-cta p:last-child {
  max-width: 720px;
  margin: 10px 0 0;
  color: var(--concept-muted);
}

.concept-button {
  min-height: 48px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 2px solid transparent;
  border-radius: 12px;
  font-family: "Poppins", sans-serif;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.concept-button--primary {
  background: var(--concept-gold);
  color: var(--concept-navy);
  box-shadow: 0 8px 20px rgba(28, 49, 68, 0.14);
}

.concept-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(28, 49, 68, 0.2);
}

.concept-button:focus-visible {
  outline: 3px solid var(--concept-navy);
  outline-offset: 4px;
}

@media (max-width: 1023px) {
  .concept-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-timeline::before {
    display: none;
  }
}

@media (max-width: 800px) {
  .concept-host {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 767px) {
  .concept-section {
    padding-block: 48px;
  }

  .concept-story,
  .concept-selection,
  .concept-independent,
  .concept-founder {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .concept-values,
  .concept-timeline {
    grid-template-columns: 1fr;
  }
  .concept-timeline__item:last-child {
        grid-column: auto;
    }

  .concept-section__heading {
    margin-bottom: 28px;
    text-align: left;
  }

  .concept-section__heading > p:last-child {
    margin-left: 0;
  }

  .concept-value {
    padding: 22px;
  }

  .concept-independent {
    padding: 26px 22px;
    border-radius: 18px;
  }

  .concept-founder__mark {
    width: 78px;
    height: 78px;
    border-width: 5px;
    font-size: 1.35rem;
  }

  .concept-cta__inner {
    align-items: stretch;
    flex-direction: column;
  }

  .concept-cta .concept-button,
  .concept-actions .btn {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .concept-hero__inner {
    grid-template-columns: 1fr;
  }

  .concept-hero__mascot img {
    width: min(100%, 180px);
    max-height: 200px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .concept-button {
    transition: none;
  }
}