:root {
  /* Palette océan sobre */
  --blue-deep: #03314B; /* océan profond */
  --blue: #0F5E7E; /* vague */
  --teal: #19B5C8; /* écume / accent doux */
  --sand: #F3ECE1; /* sable */
  --white: #FFFFFF;
  --ink: #0f172a;
  --muted: #5b6775;
  --accent: #F07C3E; /* accent rare (boutons) */
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--sand);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

.text-center {
  text-align: center;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- Header ---- */
.site-header {
  background: linear-gradient(180deg, var(--blue-deep), #06283d);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid #ffffff22;
}

.nav {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: none;
  gap: 1.6rem;
  opacity: 0.9;
}

@media (min-width: 880px) {
  .nav-links {
    display: flex;
  }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 2.8rem;
  padding: 0 1rem;
  border-radius: 12px;
  border: 0;
  cursor: pointer;
  font-weight: 600;
  line-height: 1;
  transition: 0.18s transform, 0.18s filter;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-secondary {
    background: var(--teal);
    color: var(--white)
}

.btn-ghost {
  background: #ffffff14;
  color: #fff;
}

/* ---- Page layout ---- */
.page {
  display: flex;
  justify-content: center;
}

/* ---- Hero ---- */
.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: linear-gradient(180deg, #0a3b56 0%, #06283d 55%, #041d2c 100%);
  padding: 20px 0 120px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: center;
}

.hero h1 {
  font-family: Poppins, Inter, sans-serif;
  font-size: clamp(2.1rem, 3.6vw, 3.2rem);
  line-height: 1.1;
  margin: 0;
}

.hero p {
  margin: 1rem 0 0;
  opacity: 0.95;
  max-width: 60ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

@media (max-width: 640px) {
  .hero {
    padding-bottom: 50px;
  }

  .hero img {
    display: none;
  }

  .hero-content {
    grid-template-columns: 1fr;
  }
}

/* Vague séparatrice */
.wave {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: auto;
  display: block;
  max-height: 200px;
}

/* ---- Sections ---- */
section {
  padding: 3.6rem 0;
  font-size: 1.05rem;
  color: #2a3440;
}

.section-title {
  font-family: Poppins, Inter, sans-serif;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  margin: 0 0 0.6rem;
  color: #09263a;
}

/* ---- Solution (2 colonnes) ---- */
.solution {
  background: var(--white);
  padding: 5rem 0;
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.solution-media img {
  width: 100%;
  height: auto;
  border-radius: 1rem;
  display: block;
}

@media (max-width: 768px) {
  .solution-grid {
    grid-template-columns: 1fr;
  }

  .solution-media {
    order: -1;
  }
}

.action .button {
  display: flex;
  gap: 20px;
  justify-content: center;
}

/* ---- Footer ---- */
.site-footer {
  background: linear-gradient(180deg, #06283d, #051f31);
  color: #e8f7fb;
  padding: 2.2rem 0;
  border-top: 1px solid #ffffff22;
}