/* Reset and base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Typography */
:root {
    --font-stack: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;
    --text-color: #111;
    --bg-color: #fff;
    --border-color: #e5e5e5;
    --link-color: #0066cc;
    --muted-color: #666;
}

body {
    font-family: var(--font-stack);
    font-size: 15px;
    line-height: 1.65;
    color: var(--text-color);
    background: var(--bg-color);
}

/* Layout */
.wrap {
    max-width: 720px;
    margin: 0 auto;
    padding: 24px;
}

/* Typography scale */
h1 {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 8px;
    position: relative;
}

h2 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 32px;
    margin-bottom: 14px;
    letter-spacing: 0.02em;
}

h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

p {
    margin-bottom: 20px;
}

/* Hero section */
.hero {
    padding: 40px 0 32px;
    border-bottom: 1px solid var(--border-color);
}

.tagline {
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.01em;
    color: var(--muted-color);
    margin-bottom: 0;
}


@media (max-width: 640px) {
    h1 {
        font-size: 28px;
    }
    
    .tagline {
        font-size: 15px;
    }
    
    body {
        font-size: 14px;
    }
}

/* Sections */
section {
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
    border-bottom: none;
}


/* Lists */
ul {
    list-style: none;
}

ul li {
    padding-left: 20px;
    margin-bottom: 8px;
    position: relative;
}

ul li:before {
    content: "•";
    position: absolute;
    left: 0;
}

.link-list li {
    margin-bottom: 12px;
}

/* Links */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: text-decoration 0.2s ease;
}

a:hover {
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}


/* Footer */
footer {
    padding: 32px 0 24px;
    font-size: 14px;
    color: var(--muted-color);
}

footer p {
    margin-bottom: 0;
}

/* Dark mode variant */
.dark {
    --text-color: #e5e5e5;
    --bg-color: #0a0a0a;
    --border-color: #333;
    --link-color: #6db3f2;
    --muted-color: #999;
}

.dark body {
    color: var(--text-color);
    background: var(--bg-color);
}