/* Basic resets and global styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: sans-serif;
  background-color: #f9f9f9;
  color: #333;
  padding: 1rem;
  line-height: 1.6;
}

/* Navigation links at top of each page */
.nav {
  margin-bottom: 1rem;
}

.nav a {
  margin-right: 1rem;
  color: #0066cc;
  text-decoration: none;
}

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

/* Container for page content */
.container {
  max-width: 800px;
  margin: 0 auto;
  background: #fff;
  padding: 2rem;
  border-radius: 8px;
}

/* Heading styles */
h1, h2, h3 {
  margin-bottom: 1rem;
  color: #333;
}

h1 {
  font-size: 2rem;
  margin-top: 1rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

h3 {
  font-size: 1.2rem;
  margin-top: 1rem;
}

/* Form styles for calculators */
form {
  margin-top: 1rem;
}

label {
  display: block;
  margin: 0.5rem 0 0.25rem;
  font-weight: bold;
}

input, button {
  padding: 0.5rem;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

button {
  cursor: pointer;
  background-color: #0066cc;
  color: #fff;
  border: none;
  border-radius: 4px;
}

button:hover {
  background-color: #004999;
}

/* Card-like links on the homepage */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.card {
  background-color: #fff;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.1);
}

.card a {
  text-decoration: none;
  color: #0066cc;
  font-weight: bold;
}