body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: #f2f2f2;
  color: #222;
}

header {
  background: #1f2b3b;
  color: #fff;
  padding: 30px 15px;
  text-align: center;
}

.header-container {
  max-width: 800px;
  margin: auto;
  border: 2px solid #fff;
  border-radius: 15px;
  padding: 20px;
  background: #2a3e54;
}

h1 {
  margin-bottom: 10px;
}

.clignote {
  color: #ffcc00;
  font-weight: bold;
  animation: clignoter 1s infinite alternate;
}

@keyframes clignoter {
  from { opacity: 1; }
  to { opacity: 0.5; }
}

nav {
  background: #ffcc00;
  padding: 10px;
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  color: #1f2b3b;
  font-weight: bold;
  background: #fff;
  padding: 10px 20px;
  border-radius: 20px;
  transition: 0.3s;
}

nav a:hover {
  background-color: #ffe66d;
}

main {
  max-width: 1000px;
  margin: auto;
  padding: 30px 20px;
}

h2 {
  color: #1f2b3b;
}

ul {
  list-style: none;
  padding-left: 0;
}

ul li {
  margin: 10px 0;
  padding-left: 20px;
}

.photo {
  text-align: center;
  margin: 30px 0;
}

.photo img {
  max-width: 90%;
  border-radius: 15px;
  box-shadow: 0 0 10px rgba(0,0,0,0.15);
}

footer {
  background: #1f2b3b;
  color: white;
  text-align: center;
  padding: 20px;
  font-size: 0.9em;
}