:root {
    --accent: #0064d2;
    --text: #1c1c1e;
    --secondary: #6c6c70;
    --background: #ffffff;
    --surface: #f2f2f7;
    --border: #d1d1d6;
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --accent: #4c9bff;
        --text: #f2f2f7;
        --secondary: #a1a1a6;
        --background: #000000;
        --surface: #1c1c1e;
        --border: #38383a;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-text-size-adjust: 100%;
}

main,
header,
footer {
    max-width: 680px;
    margin: 0 auto;
    padding: 0 16px;
}

header {
    padding-top: 24px;
}

header a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-weight: 600;
    text-decoration: none;
}

header img {
    width: 32px;
    height: 32px;
    border-radius: 7px;
}

a {
    color: var(--accent);
}

h1 {
    font-size: 34px;
    line-height: 1.15;
    margin: 32px 0 8px;
}

h2 {
    font-size: 22px;
    margin: 36px 0 8px;
}

h3 {
    font-size: 17px;
    margin: 24px 0 4px;
}

p,
ul {
    margin: 0 0 14px;
}

.lead {
    font-size: 20px;
    color: var(--secondary);
}

.meta {
    color: var(--secondary);
    font-size: 15px;
}

.hero {
    text-align: center;
    padding: 32px 0 8px;
}

.hero img {
    width: 128px;
    height: 128px;
    border-radius: 28px;
    box-shadow: 0 6px 20px rgb(0 0 0 / 0.18);
}

.hero h1 {
    margin-top: 20px;
}

.card {
    background: var(--surface);
    border-radius: 14px;
    padding: 4px 20px 6px;
    margin: 20px 0;
}

.contact {
    font-size: 20px;
    font-weight: 600;
}

footer {
    margin-top: 56px;
    padding-top: 20px;
    padding-bottom: 40px;
    border-top: 1px solid var(--border);
    color: var(--secondary);
    font-size: 15px;
}

footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 20px;
    margin-bottom: 8px;
}

.card h2 {
    margin-top: 16px;
}