:root {
  /* Palette basée sur ton logo Caliko */
  --bg: #1a3a4a;                /* Bleu-gris foncé du logo */
  --bg-deep: #14303d;           /* Plus profond pour sections alt */
  --bg-alt: #0f2833;
  --accent: #4a8fa8;            /* Bleu clair accent */
  --accent-soft: rgba(74, 143, 168, 0.15);
  --accent-hover: #5ea8c4;
  --text: #f0f0f0;              /* Gris clair du logo */
  --muted: #a0b8c4;
  --border: #2a4a5a;
  --radius: 10px;
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.4);
  --max-width: 1100px;
  --transition: 0.2s ease-in-out;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

body {
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
  color: var(--text);
  font-family: var(--font-main);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Layout utilitaire */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4.5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-alt) 100%);
}

/* Topbar / header */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(20, 48, 61, 0.97), rgba(20, 48, 61, 0.85));
  border-bottom: 1px solid rgba(160, 184, 196, 0.15);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  height: 40px;
  width: auto;
}

/* Switch langue */

.lang-switch {
  display: inline-flex;
  gap: 0.4rem;
  padding: 0.2rem;
  background: rgba(15, 40, 51, 0.9);
  border-radius: 999px;
  border: 1px solid rgba(160, 184, 196, 0.3);
}

.lang-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  cursor: pointer;
  border-radius: 999px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}

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

.lang-btn.active {
  background: var(--accent);
  color: var(--bg-alt);
  font-weight: 600;
}

/* Hero */

.hero {
  padding: 5rem 0 3.5rem;
}

.hero-content {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1.6fr);
  gap: 3rem;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.7rem);
  line-height: 1.2;
  margin: 0 0 1rem;
}

.hero-tagline {
  margin: 0 0 1.8rem;
  color: var(--muted);
  max-width: 28rem;
}

.hero-aside {
  justify-self: flex-end;
}

.hero-highlight {
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  background: linear-gradient(135deg, rgba(74, 143, 168, 0.25), rgba(15, 40, 51, 0.9));
  border: 1px solid rgba(74, 143, 168, 0.5);
  box-shadow: var(--shadow-soft);
  font-size: 0.95rem;
}

/* Boutons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.btn.primary {
  background: var(--accent);
  color: var(--bg-alt);
  box-shadow: 0 10px 30px rgba(74, 143, 168, 0.35);
}

.btn.primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(74, 143, 168, 0.45);
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: rgba(160, 184, 196, 0.5);
  margin-left: 0.7rem;
}

.btn.ghost:hover {
  background: rgba(160, 184, 196, 0.12);
  border-color: var(--accent);
}

/* Grilles */

.grid {
  display: grid;
  gap: 2rem;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

/* Cartes / pills */

.cards {
  margin-top: 2rem;
}

.card {
  background: rgba(15, 40, 51, 0.95);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.7rem;
  font-size: 1.05rem;
  color: var(--text);
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 50px rgba(0, 0, 0, 0.5);
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(74, 143, 168, 0.15), rgba(15, 40, 51, 0.95));
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.pill {
  font-size: 0.78rem;
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  border: 1px solid rgba(160, 184, 196, 0.4);
  background: var(--accent-soft);
  color: var(--muted);
}

/* Titres de section */

.section h2 {
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--text);
}

.section h3 {
  font-size: 1.05rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.section p {
  font-size: 0.95rem;
  color: var(--muted);
}

/* Bloc légal */

.legal-box {
  border-radius: var(--radius);
  background: rgba(15, 40, 51, 0.95);
  border: 1px solid var(--border);
  padding: 1.75rem 1.6rem;
  max-width: 500px;
  box-shadow: var(--shadow-soft);
}

.legal-box p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

/* Formulaire de contact */

.contact-form {
  max-width: 540px;
  margin-top: 1.5rem;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: rgba(15, 40, 51, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(160, 184, 196, 0.6);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74, 143, 168, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-status {
  margin-top: 1rem;
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
}

.form-status:empty {
  display: none;
}

.form-status.success {
  display: block;
  background: rgba(74, 168, 100, 0.2);
  border: 1px solid rgba(74, 168, 100, 0.5);
  color: #6fd68c;
}

.form-status.error {
  display: block;
  background: rgba(200, 80, 80, 0.2);
  border: 1px solid rgba(200, 80, 80, 0.5);
  color: #e88;
}

/* Contact list */

.contact-list {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.contact-list li {
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-list a {
  color: var(--accent);
  text-decoration: none;
}

.contact-list a:hover {
  text-decoration: underline;
}

/* Footer */

.footer {
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(160, 184, 196, 0.15);
  background: rgba(15, 40, 51, 0.97);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer-link {
  color: var(--muted);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--accent);
}

/* Responsive */

@media (max-width: 900px) {
  .hero-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-aside {
    justify-self: flex-start;
  }

  .grid.two {
    grid-template-columns: minmax(0, 1fr);
  }

  .grid.three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .btn.ghost {
    margin-left: 0.5rem;
  }
}

@media (max-width: 640px) {
  .topbar-inner {
    padding-inline: 1rem;
  }

  .brand-logo {
    height: 32px;
  }

  .hero {
    padding-top: 3.5rem;
  }

  .hero-content {
    gap: 2rem;
  }

  .grid.three {
    grid-template-columns: minmax(0, 1fr);
  }

  .section {
    padding: 3rem 0;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn.ghost {
    margin-left: 0;
    margin-top: 0.5rem;
  }
}