/* Minimalist, plain style for refreshed index.html */

:root {
    --bg: #ffffff;
    --fg: #111111;
    --muted: #666666;
    --border: #e5e7eb;
    --link: #2563eb;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    color: var(--fg);
    background: var(--bg);
    line-height: 1.6;
}

header {
    border-bottom: 1px solid var(--border);
    background: #fff;
    position: sticky;
    top: 0;
}

nav {
    max-width: 960px;
    margin: 0 auto;
    padding: 12px 16px;
    display: flex;
    gap: 16px;
}

nav a {
    color: var(--fg);
    text-decoration: none;
    padding: 6px 10px;
    border-radius: 6px;
}

nav a:hover {
    background: #f7f7f7;
}

main {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px 64px;
}

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

section:last-child {
    border-bottom: none;
}

h1, h2 {
    margin: 0 0 12px;
    font-weight: 600;
}

h1 { font-size: 28px; }
h2 { font-size: 20px; color: var(--muted); }

p { margin: 0 0 12px; }

ul { margin: 0; padding-left: 18px; }

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

footer {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px 64px;
    color: var(--muted);
}