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

body {
font-family: "Open Sans", sans-serif;
font-size: 16px;
font-weight: 300;
line-height: 1.8;
color: #757575;
background-color: #f9f9f9;
}

header {
background-color: #336ca6;
padding: 20px 0;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.header-content {
max-width: 1100px;
margin: 0 auto;
padding: 0 20px;
}

.site-title {
font-size: 28px;
font-weight: 900;
color: #fff;
margin: 0;
text-align: center;
}

nav {
max-width: 1100px;
margin: 0 auto;
background-color: rgba(0, 0, 0, 0.2);
}

nav ul {
list-style: none;
display: flex;
justify-content: center;
flex-wrap: wrap;
padding: 0;
margin: 0;
}

nav ul li {
margin: 0;
}

nav ul li a {
display: block;
padding: 12px 20px;
color: #fff;
text-decoration: none;
font-weight: 300;
transition: background-color 0.3s;
}

nav ul li a:hover {
background-color: rgba(255, 255, 255, 0.1);
}

.container {
max-width: 1100px;
margin: 0 auto;
padding: 40px 20px;
background-color: #fff;
min-height: 60vh;
}

h1 {
font-size: 48px;
font-weight: 400;
color: #333;
margin-bottom: 30px;
line-height: 1.2;
}

article {
margin-bottom: 40px;
}

article h2 {
font-size: 21px;
font-weight: 400;
color: #333;
margin: 30px 0 20px;
}

article h3 {
font-size: 18px;
font-weight: 400;
color: #333;
margin: 25px 0 15px;
}

article p {
margin-bottom: 20px;
color: #757575;
}

.transition-section {
margin: 40px 0;
padding: 30px 0;
border-top: 1px solid #ddd;
}

.links-section {
margin-top: 40px;
padding: 40px 30px;
background-color: #f5f5f5;
border-radius: 4px;
}

.links-section h3 {
font-size: 24px;
font-weight: 400;
color: #333;
margin-bottom: 20px;
}

.links-section ul {
list-style: none;
display: grid;
grid-template-columns: repeat(2, 1fr);
gap: 15px 30px;
margin-bottom: 30px;
}

.links-section ul li {
margin: 0;
padding: 0;
}

.links-section ul li a {
color: #199cd8;
text-decoration: none;
transition: color 0.2s;
}

.links-section ul li a:hover {
color: #1581b2;
text-decoration: underline;
}

footer {
background-color: #53a9db;
color: #fff;
text-align: center;
padding: 20px;
margin-top: 40px;
}

footer p {
margin: 0;
font-size: 14px;
}

@media (max-width: 768px) {
h1 {
font-size: 35px;
}

.site-title {
font-size: 24px;
}

nav ul {
flex-direction: column;
text-align: center;
}

nav ul li {
border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav ul li:last-child {
border-bottom: none;
}

.links-section ul {
grid-template-columns: 1fr;
gap: 12px;
}

.container {
padding: 30px 15px;
}

.links-section {
padding: 30px 20px;
}
}

@media (max-width: 480px) {
h1 {
font-size: 28px;
}

article h2 {
font-size: 19px;
}

article h3 {
font-size: 16px;
}

body {
font-size: 15px;
}
}