* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: #263238;
  background: #cae2fa;
}

header {
  background: linear-gradient(135deg, #123a5f, #1f5f8f);
  color: white;
  padding: 3rem 1.5rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.4rem;
  font-weight: 600;
}

header p {
  margin: 0.8rem auto 0;
  max-width: 760px;
  font-size: 1.1rem;
  opacity: 0.95;
}

nav {
  background: #0f2f4d;
  text-align: center;
  padding: 0.8rem;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 0.8rem;
  font-weight: 600;
}

nav a:hover {
  text-decoration: underline;
}

main {
  max-width: 1050px;
  margin: 1.3rem auto 3rem;
  padding: 0 1rem;
}

.card,
.note {
  background: #ffffff;
  border-radius: 16px;
  padding: 1.8rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 24px rgba(18, 58, 95, 0.10);
}

section {
  background: transparent;
  border-radius: 0;
  padding: 0;
  margin-bottom: 2rem;
  box-shadow: none;
}

h2 {
  color: #123a5f;
  margin-top: 0;
  border-bottom: 2px solid #d7e6f2;
  padding-bottom: 0.4rem;
}

h3 {
  color: #1f5f8f;
}

a {
  color: #1f5f8f;
}

a:hover {
  color: #123a5f;
}

.button,
.btn {
  display: inline-block;
  background: #1f5f8f;
  color: white;
  text-decoration: none;
  padding: 0.7rem 1rem;
  border-radius: 8px;
  font-weight: 600;
}

.button:hover,
.btn:hover {
  background: #123a5f;
  color: white;
}

.gallery,
.galerie {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.gallery img,
.galerie img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(18, 58, 95, 0.18);
  background: white;
}

footer {
  background: #0f2f4d;
  color: white;
  text-align: center;
  padding: 1.8rem;
  margin-top: 3rem;
  font-size: 0.95rem;
}

footer a {
  color: white;
}

@media (max-width: 700px) {
  header {
    padding: 2rem 1rem;
  }

  header h1 {
    font-size: 1.9rem;
  }

  nav a {
    display: block;
    margin: 0.4rem 0;
  }

  main {
    margin: 1rem auto;
  }

  .card,
  .note {
    padding: 1.1rem;
  }

  section {
    padding: 0;
  }
}