* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, sans-serif;
  background: #f4f6f8;
  color: #1e1e1e;
}

/* HEADER */
.site-header {
  background: #1f3c4a;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  max-width: 1100px;
  margin: auto;
  padding: 15px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: Poppins;
  font-weight: 700;
  font-size: 1.4rem;
  color: white;
}

.menu-desktop a {
  color: white;
  margin-left: 20px;
  font-weight: 600;
  text-decoration: none;
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: white;
  margin: 4px 0;
}

.menu-mobile {
  display: none;
  flex-direction: column;
  background: #1f3c4a;
}

.menu-mobile a {
  text-decoration: none;
  padding: 15px;
  color: white;
  border-top: 1px solid #2b4c5b;
}

.menu-mobile.open {
  display: flex;
}

/* FOOTER */
.site-footer {
  background: #142a34;
  color: white;
  text-align: center;
  padding: 25px 15px;
  margin-top: 60px;
}

.site-footer a {
  color: #3a6f7d;
  text-decoration: none;
}

/* FORMS (centrés et symétriques) */
.form-box {
  max-width: 600px;
  margin: 50px auto;
  background: white;
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 25px 50px rgba(0,0,0,.08);
}

.form-box input,
.form-box textarea,
.form-box select {
  width: 100%;
  padding: 16px;
  margin-bottom: 15px;
  border-radius: 14px;
  border: 1px solid #ddd;
  font-size: 1rem;
}

.form-box button {
  width: 100%;
  padding: 16px;
  background: #3a6f7d;
  color: white;
  font-weight: 600;
  border: none;
  border-radius: 14px;
  cursor: pointer;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .menu-desktop { display: none; }
  .hamburger { display: flex; }
}