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

body {
font-family: Arial, Helvetica, sans-serif;
font-size: 13px;
line-height: 1.6;
color: #45484C;
background: #eaeae6;
}

.wrapper {
max-width: 1200px;
margin: 0 auto;
padding: 0 15px;
}

header {
background: #45484C;
padding: 15px 0;
box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-content {
display: flex;
align-items: center;
justify-content: space-between;
flex-wrap: wrap;
}

.logo {
color: #fff;
font-size: 24px;
font-weight: bold;
text-transform: uppercase;
text-decoration: none;
padding: 10px 0;
}

nav {
background: #fff;
margin: 10px 0;
border-radius: 5px;
box-shadow: inset 0 1px 0 rgba(255,255,255,1.0), 0 1px 2px rgba(0,0,0,0.12);
}

.nav-menu {
list-style: none;
display: flex;
flex-wrap: wrap;
padding: 0;
margin: 0;
}

.nav-menu > li {
position: relative;
margin-right: 10px;
}

.nav-menu > li > a {
display: block;
padding: 15px 12px;
color: #45484C;
text-decoration: none;
font-weight: bold;
text-transform: uppercase;
font-size: 13px;
border-top: 1px solid transparent;
border-bottom: 1px solid transparent;
transition: all 0.3s ease;
}

.nav-menu > li > a:hover {
color: #4cd1d0;
}

main {
background: #fff;
margin: 20px auto;
padding: 30px;
border-radius: 5px;
box-shadow: inset 0 1px 0 rgba(255,255,255,1.0), 0 1px 2px rgba(0,0,0,0.12);
}

h1 {
font-size: 26px;
line-height: 1.3;
color: #45484C;
text-transform: uppercase;
margin-bottom: 25px;
padding-bottom: 15px;
border-bottom: 1px solid #dddedb;
}

h2 {
font-size: 20px;
line-height: 1.4;
color: #ea5353;
text-transform: uppercase;
font-weight: bold;
margin: 25px 0 15px 0;
}

h3 {
font-size: 16px;
line-height: 1.4;
color: #4cd1d0;
text-transform: uppercase;
font-weight: bold;
margin: 20px 0 12px 0;
}

article p {
margin-bottom: 15px;
line-height: 1.8;
}

article strong {
color: #323338;
font-weight: bold;
}

article a {
color: #98999a;
text-decoration: underline;
transition: color 0.15s ease-in-out;
}

article a:hover {
color: #ea5353;
}

.transition-section {
margin: 30px 0;
padding: 25px 0;
border-top: 1px solid #dddedb;
}

.transition-section p {
margin-bottom: 15px;
line-height: 1.8;
}

.links-section {
margin-top: 40px;
padding: 30px;
background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==);
border-radius: 5px;
box-shadow: inset 0 1px 0 rgba(255,255,255,1.0), 0 1px 2px rgba(0,0,0,0.12);
}

.links-section h2 {
color: #ea5353;
margin-top: 30px;
margin-bottom: 15px;
}

.links-section h2:first-child {
margin-top: 0;
}

.links-section h3 {
color: #4cd1d0;
margin-top: 25px;
margin-bottom: 12px;
font-size: 16px;
}

.links-columns {
column-count: 2;
column-gap: 30px;
}

.links-columns ul {
list-style: none;
margin: 0 0 25px 0;
padding: 0;
break-inside: avoid;
}

.links-columns li {
padding: 8px 0 8px 20px;
border-top: 1px solid #dddedb;
background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAPklEQVQYV2NkYGD4z4AEjAxIAhQpZERWiKyQgYGBgQEXYIKpIUsROYpQJZEVYtNEUCGyQlyKCCpEsRCXIgDh8QoLfoTW+AAAAABJRU5ErkJggg==) 0 13px no-repeat;
}

.links-columns li:first-child {
border-top: none;
}

.links-columns li a {
color: #45484C;
text-decoration: none;
transition: color 0.3s ease;
display: block;
}

.links-columns li a:hover {
color: #4cd1d0;
}

footer {
background: #383C3F;
color: #b6babd;
padding: 30px 0;
margin-top: 40px;
text-align: center;
font-size: 12px;
}

footer p {
margin: 5px 0;
}

@media (max-width: 768px) {
.wrapper {
padding: 0 10px;
}

.header-content {
flex-direction: column;
text-align: center;
}

.nav-menu {
flex-direction: column;
}

.nav-menu > li {
margin: 0;
border-bottom: 1px solid #dddedb;
}

.nav-menu > li:last-child {
border-bottom: none;
}

.nav-menu > li > a {
padding: 12px 15px;
}

main {
padding: 20px 15px;
margin: 10px auto;
}

h1 {
font-size: 22px;
}

h2 {
font-size: 18px;
}

h3 {
font-size: 15px;
}

.links-columns {
column-count: 1;
}

.links-section {
padding: 20px 15px;
}
}

@media (max-width: 480px) {
h1 {
font-size: 20px;
}

h2 {
font-size: 16px;
}

main {
padding: 15px 10px;
}

.links-section {
padding: 15px 10px;
}
}