:root {
    color-scheme: light;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #18202a;
    background: #f5f7fb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at top left, rgba(11,99,223,.09), transparent 34rem),
        radial-gradient(circle at bottom right, rgba(239,68,68,.07), transparent 30rem),
        #f5f7fb;
    min-height: 100vh;
}

header {
    width: min(1040px, calc(100% - 40px));
    margin: 0 auto;
    padding: 28px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.04em;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

a {
    color: #0b63df;
    text-decoration: none;
}

nav a {
    color: #4b5563;
    font-size: 14px;
}

main {
    width: min(900px, calc(100% - 40px));
    margin: 40px auto 80px;
}

.hero {
    padding: 56px;
    background: rgba(255,255,255,.94);
    border: 1px solid #e2e7ee;
    border-radius: 28px;
    box-shadow: 0 22px 60px rgba(31,35,40,.08);
}

h1 {
    margin: 0 0 18px;
    font-size: clamp(36px, 6vw, 64px);
    line-height: 1;
    letter-spacing: -0.055em;
}

h2 {
    margin-top: 36px;
}

p, li {
    color: #5d6675;
    line-height: 1.75;
}

.lead {
    max-width: 720px;
    font-size: 19px;
}

.actions {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 20px;
    color: #fff;
    background: #0b63df;
    border-radius: 12px;
    font-weight: 700;
}

.button.secondary {
    color: #253041;
    background: #eef2f7;
}

.cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0,1fr));
    gap: 16px;
    margin-top: 24px;
}

.card {
    padding: 22px;
    background: #fff;
    border: 1px solid #e2e7ee;
    border-radius: 18px;
}

.card h3 {
    margin-top: 0;
}

footer {
    width: min(900px, calc(100% - 40px));
    margin: 0 auto;
    padding: 0 0 40px;
    color: #89919d;
    font-size: 13px;
}

@media (max-width: 720px) {
    header {
        align-items: flex-start;
        gap: 18px;
        flex-direction: column;
    }

    .hero {
        padding: 30px 24px;
    }

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