/* General Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Body */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f9f9f9;
  color: #111;
  line-height: 1.6;
}

/* Header */
header {
  background-color: #111827;
  color: #f9fafb;
  padding: 1rem 0;
  text-align: center;
}

header h1 {
  margin-bottom: 0.5rem;
  font-size: 2rem;
}

/* Navigation */
nav a {
  color: #f9fafb;
  text-decoration: none;
  margin: 0 0.5rem;
  font-weight: 500;
}

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

/* Main content */
main {
  padding: 2rem;
  max-width: 900px;
  margin: auto;
}

section {
  margin-bottom: 2rem;
}

h2 {
  margin-bottom: 0.5rem;
  color: #1f2937;
}

/* Forms */
form {
  background-color: #ffffff;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

input, textarea, button {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border-radius: 5px;
  border: 1px solid #ccc;
  font-size: 1rem;
}

input:focus, textarea:focus {
  border-color: #3b82f6;
  outline: none;
}

button {
  background-color: #3b82f6;
  color: white;
  border: none;
  cursor: pointer;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #2563eb;
}

/* Footer */
footer {
  background-color: #111827;
  color: #f9fafb;
  text-align: center;
  padding: 1rem 0;
  margin-top: 2rem;
}

/* Responsive */
@media (max-width: 600px) {
  nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
}