body {
  font-family: "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
}

header {
  background: #000;
  color: #fff;
  text-align: center;
  padding: 20px;
}

header h1 {
  margin: 0;
}

.main-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  padding: 20px;
}

.box {
  background: #fff;
  padding: 20px;
  margin: 10px;
  border-radius: 8px;
  width: 300px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

input, select, button {
  display: block;
  margin: 10px 0;
  padding: 10px;
  width: 100%;
}

button {
  background-color: #000;
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background-color: #444;
}

.hidden {
  display: none;
}

.admin-block {
  margin-top: 15px;
}

footer {
  background: #000;
  color: white;
  text-align: center;
  padding: 15px;
  margin-top: 30px;
}