:root {
  --fond: #ffffff;
  --texte: #1b1f24;
  --carte: #f1f3f5;
  --accent: #e8590c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--fond);
  color: var(--texte);
  line-height: 1.5;
}

section {
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 20px;
}

.entete {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: #111418;
}

.logo {
  color: #ffffff;
  font-weight: bold;
  font-size: 22px;
  text-decoration: none;
}

.menu {
  display: flex;
  align-items: center;
  gap: 20px;
}

.menu a {
  color: #ffffff;
  text-decoration: none;
}

.burger {
  display: none;
}

body.sombre {
  --fond: #16191d;
  --texte: #e9ecef;
  --carte: #23272d;
}

.theme {
  background: none;
  color: #ffffff;
  border: 1px solid #ffffff;
  padding: 6px 12px;
  cursor: pointer;
}

.hero {
  max-width: none;
  text-align: center;
  background: #111418;
  color: #ffffff;
  padding: 80px 20px;
}

.hero h1 {
  font-size: 56px;
  margin: 0 0 10px;
}

.compteur {
  font-size: 32px;
  font-weight: bold;
  color: var(--accent);
}

.bouton {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  border: none;
  padding: 12px 24px;
  font-size: 18px;
  text-decoration: none;
  cursor: pointer;
}

.cartes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.carte {
  background: var(--carte);
  padding: 16px;
}

.carte h3 {
  margin-top: 0;
}

.heure {
  color: var(--accent);
  font-weight: bold;
}

form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 360px;
}

input,
select {
  padding: 10px;
  font-size: 16px;
}

.erreur {
  color: #c92a2a;
  font-weight: bold;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 14px;
  background: var(--carte);
}

@media (max-width: 700px) {
  .hero h1 {
    font-size: 36px;
  }

  .compteur {
    font-size: 22px;
  }

  .burger {
    display: block;
    background: none;
    color: #ffffff;
    border: 1px solid #ffffff;
    padding: 6px 12px;
  }

  .menu {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #23272d;
    padding: 16px;
  }

  .menu.ouvert {
    display: flex;
  }
}