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

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f9f9f9;
  color: #222;
  line-height: 1.6;
  padding: 1rem; }

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

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
  background: #fff;
  border-radius: 8px; }

.text-center {
  text-align: center; }

.mt-2 {
  margin-top: 1rem; }

nav a {
  display: inline-block;
  margin: 0 0.5rem;
  padding: 0.5rem 1rem;
  color: #007bff;
  text-decoration: none;
  font-weight: bold;
  border-radius: 4px;
  transition: background-color 0.2s ease; }

nav a:hover {
  background-color: #e6f0ff; }

.mobile-nav {
  display: none; }

.hide-desktop {
  display: none; }

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 1rem; }

@media screen and (max-width: 768px) {
  header {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    max-width: 90%;
    margin: 0 auto;
    border: 2px solid #ddd;
    border-radius: 10px;
    background-color: #fff;
    background: linear-gradient(to bottom right, #f0f0f0, #e0e0e0);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12); }
  header img {
    height: 94px;
    margin-left: 1rem;
    margin-bottom: 0.75rem; }
  .desktop-nav {
    display: none; }
  .mobile-nav {
    display: block;
    width: 100%;
    padding: 0 1rem;
    margin-top: 1rem; }
  .nav-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem; }
  .nav-link {
    flex: 1;
    margin: 0 0.25rem;
    padding: 0.75rem 1rem;
    font-size: 1.1rem;
    font-weight: bold;
    color: #007bff;
    text-decoration: none;
    background-color: #f1f1f1;
    text-align: center;
    border-radius: 6px;
    transition: background-color 0.2s ease; }
  .nav-link:hover {
    background-color: #e6f0ff; }
  .hide-mobile {
    display: none; } }