* {
box-sizing: border-box;
}

body {
margin: 0;
font-family: Inter, Arial, sans-serif;
color: #172033;
background: #f6f8fb;
}

.header {
display: flex;
justify-content: space-between;
align-items: center;
padding: 24px 8%;
background: #ffffff;
border-bottom: 1px solid #e8ecf3;
}

.logo {
font-weight: 700;
font-size: 22px;
}

nav a {
margin-left: 24px;
color: #34415e;
text-decoration: none;
}

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

.hero {
padding: 90px 8%;
background: linear-gradient(135deg, #ffffff, #eaf1ff);
}

.hero h1 {
max-width: 720px;
font-size: 48px;
line-height: 1.1;
margin: 0 0 24px;
}

.hero p {
max-width: 620px;
font-size: 18px;
line-height: 1.6;
color: #4d5a73;
}

.button {
display: inline-block;
margin-top: 18px;
padding: 14px 22px;
background: #1f5eff;
color: white;
text-decoration: none;
border-radius: 10px;
}

.cards {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 22px;
padding: 50px 8%;
}

.card {
background: white;
padding: 26px;
border-radius: 16px;
border: 1px solid #e8ecf3;
}

.card h2 {
margin-top: 0;
}

footer {
padding: 28px 8%;
color: #66718a;
}

@media (max-width: 800px) {
.header {
    display: block;
}

nav {
    margin-top: 16px;
}

nav a {
    display: inline-block;
    margin: 0 16px 8px 0;
}

.hero h1 {
    font-size: 34px;
}

.cards {
    grid-template-columns: 1fr;
}
}