html, body {
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    font-size: 18px;
    color: #333333;
}

body {
    max-width: 680px;
    margin: 60px auto;
    padding: 0 24px;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 2em;
    margin-bottom: 0.8em;
    line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p { 
    margin-bottom: 1em;
}

ul, ol {
    margin-bottom: 1em;
    padding-left: 1.5em;
}

a { 
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: all 0.2s ease;
}

a:hover { 
    text-decoration: underline;
    text-decoration-thickness: 2px;
}