* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: #f9f9f9;
  color: #333;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode {
  background-color: #121212;
  color: #e0e0e0;
}

header {
  background: #fff;
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

body.dark-mode header {
  background: #1f1f1f;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: inherit;
  font-weight: bold;
  transition: color 0.3s;
}

nav a:hover {
  color: #007bff;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: inherit;
}

main {
  padding: 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.hero {
  text-align: center;
  padding: 2rem;
}

.hero img {
  max-width: 100%;
  height: auto;
  margin-top: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

input, textarea {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 1rem;
}

button[type="submit"] {
  padding: 0.75rem;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
}

button[type="submit"]:hover {
  background-color: #0056b3;
}

/* Dark mode for form elements */
body.dark-mode input,
body.dark-mode textarea {
  background-color: #1e1e1e;
  color: #e0e0e0;
  border: 1px solid #555;
}

body.dark-mode button[type="submit"] {
  background-color: #0d6efd;
}

footer {
  margin-top: 2rem;
  padding: 1rem;
  text-align: center;
  border-top: 1px solid #ccc;
  background-color: #f1f1f1;
}

body.dark-mode footer {
  background-color: #1a1a1a;
  border-top: 1px solid #333;
}

footer a {
  margin-left: 0.5rem;
  display: inline-block;
}

footer img {
  width: 24px;
  height: 24px;
  vertical-align: middle;
}