body {
  margin: 0;
  background-color: lightblue;
  font-family: Arial, sans-serif;
  text-align: center;
}

h1, h2, h3, p {
  color: black;
  max-width: 700px;
  margin: 1em auto;
  line-height: 1.5;
}

.navbar {
  background-color: #333;
  padding: 20px;
  display: flex;
  justify-content: center;
  gap: 40px;
  position: sticky;
  top: 0;
}

.navbar a {
  color: white;
  text-decoration: none;
  font-size: 18px;
}

.navbar a:hover {
  color: lightblue;
}

.box {
  background-color: white;
  width: 500px;
  height: 300px;
  margin: 40px auto;
  overflow: hidden;
}

.box iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.box img {
  max-width: 100%;
  max-height: 100%;
  display: block;
  margin: auto;
}

ol, ul {
  text-align: left;
  margin: 1em auto;
  padding-left: 40px;
  max-width: 700px;
}

.form-blok {
  background-color: white;
  width: 90%;
  max-width: 500px;
  margin: 40px auto;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 2px 2px 12px rgba(0,0,0,0.2);
  text-align: left;
}

.form-blok h2 {
  text-align: center;
  margin-bottom: 20px;
}

label {
  display: block;
  margin-top: 15px;
  font-weight: bold;
}

input, select, textarea {
  width: 100%;
  padding: 8px 10px;
  margin-top: 5px;
  border-radius: 5px;
  border: 1px solid #aaa;
  box-sizing: border-box;
}

fieldset {
  margin-top: 20px;
  border: 1px solid #aaa;
  border-radius: 5px;
  padding: 10px;
}

legend {
  font-weight: bold;
}

button {
  width: 100%;
  margin-top: 20px;
  padding: 10px;
  border: none;
  border-radius: 5px;
  background-color: #333;
  color: white;
  font-size: 16px;
}

button:hover {
  background-color: lightblue;
  color: #333;
}

table {
  width: 90%;
  max-width: 700px;
  margin: 40px auto;
  border-collapse: collapse;
  font-family: Calibri, sans-serif;
  box-shadow: 2px 2px 12px rgba(0,0,0,0.2);
}

table caption {
  font-size: 1.5em;
  font-weight: bold;
  margin-bottom: 15px;
}

table thead th {
  background-color: #333;
  color: white;
  padding: 10px;
}

table tbody td {
  border: 1px solid #aaa;
  padding: 10px;
}

table tbody tr:nth-child(even) {
  background-color: #f2f2f2;
}

.row {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 40px auto;
  max-width: 1000px;
}

.column {
  flex: 1;
  max-width: 300px;
}

.column img {
  width: 100%;
  border-radius: 8px;
}

footer {
  background-color: black;
  color: white;
  text-align: center;
  padding: 20px;
  width: 100%;
}