/*
 * accueil.css — page d'accueil (index.html). Chargé après base.css.
 *
 * Ne contient que les sections propres à l'accueil : haut de page (.hero, encadré de
 * disponibilité .signal), chiffres (.proof), expertises (.cards), méthode en 5 étapes
 * (.timeline, .step), « Notre vision » (.why, .visual), cas d'usage (.cases), et la
 * variante de bouton .btn.light (bouton clair sur fond sombre).
 *
 * En-tête, menu, pied de page, bandeau d'appel, fenêtre de contact et formulaire
 * viennent de base.css, comme sur les autres pages.
 * Attention : .step désigne ici la frise de l'accueil ; solutions.css a son propre .step
 * (carte d'étape). Les deux feuilles ne sont jamais chargées ensemble.
 */

.btn.light {
  border: 1px solid rgba(255, 255, 255, .5);
  background: transparent;
  color: #fff;
}

.btn.light:hover {
  background: #fff;
  color: var(--navy);
}

.hero {
  min-height: 460px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(100deg, rgba(7, 38, 54, .98) 0%, rgba(9, 45, 62, .94) 48%, rgba(13, 48, 68, .48) 72%, rgba(8, 39, 53, .54) 100%), url('equation-hero.webp') center 43%/cover no-repeat;
  color: #fff;
}

.hero:before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(130, 223, 217, .045) 1px, transparent 1px), linear-gradient(90deg, rgba(130, 223, 217, .045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(90deg, transparent, black);
}

.hero:after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  border: 1px solid rgba(66, 199, 192, .28);
  border-radius: 50%;
  right: -145px;
  top: 16px;
  box-shadow: 0 0 0 62px rgba(66, 199, 192, .035), 0 0 0 124px rgba(66, 199, 192, .022);
}

.hero .wrap {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  min-height: 460px;
  align-items: center;
}

.hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 750;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--turq2);
  margin-top: 0;
}

.hero .eyebrow:before {
  content: "";
  width: 30px;
  height: 2px;
  background: var(--turq);
}

h1 {
  font-size: clamp(3rem, 5vw, 4.65rem);
  line-height: .98;
  letter-spacing: -.06em;
  margin: 16px 0 17px;
  max-width: 720px;
}

h1 em {
  font-style: normal;
  color: var(--turq2);
}

.lead {
  font-size: 1.06rem;
  line-height: 1.55;
  color: #d5e4e7;
  max-width: 600px;
  margin: 0 0 23px;
}

.actions {
  display: flex;
  gap: 11px;
  flex-wrap: wrap;
}

.trust {
  margin-top: 24px;
  display: flex;
  gap: 27px;
  color: #c3d5d8;
  font-size: .78rem;
}

.trust span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(66, 199, 192, .16);
  color: var(--turq2);
  display: grid;
  place-items: center;
  font-size: .68rem;
}

.signal {
  justify-self: end;
  align-self: center;
  margin: 0;
  width: 332px;
  background: rgba(9, 43, 59, .78);
  border: 1px solid rgba(137, 224, 217, .22);
  border-radius: 18px;
  padding: 20px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.signal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #d5e4e7;
  font-size: .75rem;
}

.online {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--turq2);
}

.online i {
  width: 7px;
  height: 7px;
  background: var(--turq);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(66, 199, 192, .1);
}

.uptime {
  font-weight: 850;
  font-size: 2.2rem;
  letter-spacing: -.05em;
  margin: 6px 0 1px;
}

.mini {
  color: #a9bdc3;
  font-size: .74rem;
}

.continuity {
  display: grid;
  grid-template-columns: 66px 1fr;
  align-items: center;
  gap: 15px;
  margin-top: 18px;
  padding-top: 17px;
  border-top: 1px solid rgba(137, 224, 217, .16);
}

.availability-ring {
  position: relative;
  width: 66px;
  height: 66px;
  display: grid;
  place-items: center;
}

.availability-ring svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.availability-ring .cycle {
  fill: none;
  stroke: var(--turq);
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 1px rgba(66, 199, 192, .4));
}

.availability-ring strong {
  font-size: 1rem;
  line-height: 1;
  color: #fff;
}

.continuity-list {
  display: grid;
  gap: 7px;
}

.continuity-list span {
  position: relative;
  padding-left: 16px;
  color: #c9dadd;
  font-size: .7rem;
  font-weight: 650;
}

.continuity-list span:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--turq2);
  font-weight: 900;
}

.proof {
  position: relative;
  z-index: 5;
  margin-top: -1px;
  background: #fff;
}

.proofgrid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-top: 0;
  border-radius: 0 0 18px 18px;
  box-shadow: 0 18px 55px rgba(8, 22, 43, .08);
}

.metric {
  padding: 28px 30px;
  border-right: 1px solid var(--line);
}

.metric:last-child {
  border: 0;
}

.metric strong {
  display: block;
  font-size: 1.65rem;
  letter-spacing: -.04em;
}

.metric span {
  color: var(--muted);
  font-size: .83rem;
}

.section-top {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 44px;
  gap: 30px;
}

.section-top h2 {
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -.055em;
  margin: 12px 0 0;
  max-width: 680px;
}

.section-top p {
  max-width: 380px;
  margin: 0;
  color: var(--muted);
}

.solutions {
  background: var(--mint);
}

.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.card {
  background: #fff;
  border: 1px solid #dfebe9;
  border-radius: 18px;
  padding: 34px;
  min-height: 300px;
  position: relative;
  overflow: hidden;
  transition: .25s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 48px rgba(8, 45, 61, .1);
  border-color: transparent;
}

.card .num {
  position: absolute;
  right: 23px;
  top: 17px;
  font-size: 4.5rem;
  font-weight: 850;
  color: #edf5f4;
  letter-spacing: -.08em;
}

.icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: #e7f7f5;
  color: var(--turq);
  display: grid;
  place-items: center;
  margin-bottom: 35px;
}

.icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.25;
}

.card h3 {
  font-size: 1.55rem;
  letter-spacing: -.035em;
  margin: 0 0 10px;
}

.card p {
  color: var(--muted);
  max-width: 470px;
  margin: 0 0 23px;
}

.discover {
  font-weight: 800;
  font-size: .86rem;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.discover b {
  font-size: 1.1rem;
  color: var(--turq);
}

.method {
  background: var(--navy);
  color: #fff;
  overflow: hidden;
}

.method .section-top p {
  color: #b7c3d2;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  position: relative;
  margin-top: 60px;
}

.timeline:before {
  content: "";
  height: 1px;
  background: rgba(255, 255, 255, .17);
  position: absolute;
  top: 22px;
  left: 4%;
  right: 4%;
}

.step {
  position: relative;
  padding-right: 24px;
}

.dot {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: var(--navy2);
  border: 1px solid rgba(255, 255, 255, .2);
  display: grid;
  place-items: center;
  color: var(--turq2);
  font-weight: 850;
  position: relative;
  z-index: 2;
}

.step h3 {
  margin: 27px 0 8px;
  font-size: 1.12rem;
}

.step p {
  margin: 0;
  color: #aebccd;
  font-size: .88rem;
  max-width: 205px;
}

.whygrid {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 75px;
  align-items: center;
}

.visual {
  height: 520px;
  border-radius: 24px;
  background: linear-gradient(145deg, #17475b, #0d3044);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  align-items: flex-end;
  padding: 38px;
}

.visual:before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 32%, rgba(66, 199, 192, .32), transparent 24%), linear-gradient(125deg, transparent 40%, rgba(255, 255, 255, .05) 40%, rgba(255, 255, 255, .05) 41%, transparent 41%);
  background-size: auto, 45px 45px;
}

.vision-copy {
  position: relative;
  z-index: 1;
  color: #fff;
}

.vision-copy span {
  display: block;
  margin-bottom: 12px;
  color: var(--turq2);
  font-size: .75rem;
  font-weight: 850;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.vision-copy strong {
  display: block;
  font-size: clamp(2.45rem, 4vw, 3.8rem);
  line-height: .95;
  letter-spacing: -.055em;
}

.vision-copy p {
  max-width: 440px;
  margin: 24px 0 0;
  color: #c8dbdf;
  font-size: .94rem;
  line-height: 1.65;
}

.why h2 {
  font-size: clamp(2.4rem, 4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -.055em;
  margin: 12px 0 25px;
}

.founding {
  margin: 0 0 30px;
  padding-left: 20px;
  border-left: 3px solid var(--turq);
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.advantage {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 15px;
  margin: 23px 0;
}

.advantage i {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #e7f7f5;
  color: var(--turq);
  display: grid;
  place-items: center;
  font-style: normal;
  font-weight: 900;
}

.advantage strong {
  display: block;
  margin-bottom: 3px;
}

.advantage span {
  color: var(--muted);
  font-size: .91rem;
}

.cases {
  background: var(--mint);
}

.casegrid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 18px;
}

.case {
  border-radius: 22px;
  padding: 120px 38px 48px;
  color: #fff;
  min-height: 330px;
  background: #0d3044;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.case.secondary {
  background: #dcefed;
  color: var(--navy);
}

.case:before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 15%, rgba(66, 199, 192, .42), transparent 30%);
}

.tag {
  position: absolute;
  left: 30px;
  top: 30px;
  background: rgba(255, 255, 255, .13);
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  padding: 7px 12px;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .1em;
}

.secondary .tag {
  background: #fff;
  border-color: #fff;
}

.case h3,.case p {
  position: relative;
}

.case h3 {
  font-size: 1.8rem;
  line-height: 1.2;
  letter-spacing: -.035em;
  margin: 0 0 12px;
  max-width: 560px;
}

.case p {
  margin: 0;
  opacity: .76;
  max-width: 530px;
}

@media (max-width:900px) {
  .hero .wrap {
    grid-template-columns: 1fr;
    padding: 54px 0 48px;
    min-height: 410px;
  }

  .signal {
    display: none;
  }

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

  .metric:nth-child(2) {
    border-right: 0;
  }

  .metric:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .cards,.whygrid,.casegrid {
    grid-template-columns: 1fr;
  }

  .timeline {
    grid-template-columns: 1fr 1fr;
    gap: 46px;
  }

  .timeline:before {
    display: none;
  }

  .section-top {
    align-items: start;
    flex-direction: column;
  }

  .whygrid {
    gap: 45px;
  }

  .visual {
    height: 420px;
  }
}

@media (max-width:600px) {
  .hero .wrap {
    padding: 42px 0 38px;
    min-height: 390px;
  }

  h1 {
    font-size: 2.85rem;
    margin: 13px 0 16px;
  }

  .lead {
    font-size: 1rem;
    margin-bottom: 20px;
  }

  .actions .btn.light {
    display: none;
  }

  .trust {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-top: 20px;
  }

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

  .metric {
    padding: 20px 18px;
    border-right: 1px solid var(--line) !important;
  }

  .metric:nth-child(2n) {
    border-right: 0 !important;
  }

  .metric strong {
    font-size: 1.35rem;
  }

  .metric span {
    font-size: .76rem;
  }

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

  .card {
    min-height: auto;
  }

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

  .case {
    min-height: 280px;
  }

  .visual {
    height: 360px;
  }
}
.why .btn {
  margin-top: 18px;
}