/* Basic reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
}
:root {
  --primary: #3070b3;
  --bg-color: #ffffff;
  --text-color: #333333;
  --alt-bg: #f7f9fc;
  --nav-height: 60px;
}
.dark {
  --bg-color: #0d1b2a;
  --text-color: #e0e1dd;
  --alt-bg: #1b263b;
}

header {
  background-color: var(--primary);
  color: #ffffff;
}
header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--nav-height);
}
header nav ul {
  list-style: none;
  display: flex;
  gap: 1rem;
}
header nav a {
  color: #ffffff;
  text-decoration: none;
  font-weight: bold;
}
header nav a:hover {
  text-decoration: underline;
}
header button {
  margin-left: 0.5rem;
  background: transparent;
  border: 2px solid #ffffff;
  color: #ffffff;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
}

.container {
  width: 90%;
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 0;
}

section {
  padding: 2rem 0;
  background-color: var(--bg-color);
}
section.alt {
  background-color: var(--alt-bg);
}

h1 {
  font-size: 2rem;
}
h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

form {
  margin-top: 1rem;
}
.form-group {
  margin-bottom: 1rem;
}
label {
  display: block;
  margin-bottom: 0.5rem;
}
input,
textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}
button[type="submit"] {
  background-color: var(--primary);
  color: #ffffff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  cursor: pointer;
}
button[type="submit"]:hover {
  opacity: 0.9;
}

/* Link-styled button for call to action */
.btn {
  display: inline-block;
  background-color: var(--primary);
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
}
.btn:hover {
  opacity: 0.9;
}

/* Responsive navigation on small screens */
@media (max-width: 600px) {
  header nav {
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }
  header nav ul {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }
  header nav ul li {
    margin: 0.5rem 0;
  }
}

footer {
  background-color: var(--primary);
  color: #ffffff;
  text-align: center;
  padding: 1rem 0;
}