:root {
    color-scheme: dark;
    --bg: #000;
    --fg: #fff;
    --fg-dim: rgba(255, 255, 255, 0.65);
    --fg-muted: rgba(255, 255, 255, 0.45);
    --accent: rgba(255, 255, 255, 0.08);
    --border: rgba(255, 255, 255, 0.12);
    --max-width: 720px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 96px 32px 96px;
}

aside.rename-banner {
    background: rgba(74, 110, 255, 0.08);
    border: 1px solid rgba(74, 110, 255, 0.25);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 56px;
    color: var(--fg-dim);
    font-size: 14px;
    line-height: 1.55;
}

aside.rename-banner strong {
    color: var(--fg);
    display: block;
    margin-bottom: 4px;
}

header {
    text-align: center;
    margin-bottom: 64px;
}

header img {
    width: 96px;
    height: 96px;
    margin-bottom: 24px;
}

header h1 {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 8px;
}

header p.tagline {
    color: var(--fg-dim);
    font-size: 18px;
    margin: 0;
}

nav {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

nav a {
    color: var(--fg-dim);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 999px;
    border: 1px solid var(--border);
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s, color 0.2s;
}

nav a:hover, nav a.active {
    background: var(--accent);
    color: var(--fg);
}

h2 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 56px 0 16px;
}

h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 32px 0 8px;
    color: var(--fg);
}

h2:first-of-type {
    margin-top: 0;
}

p {
    margin: 0 0 16px;
    color: var(--fg-dim);
}

p strong {
    color: var(--fg);
    font-weight: 600;
}

ul {
    color: var(--fg-dim);
    padding-left: 20px;
    margin: 0 0 16px;
}

ul li {
    margin-bottom: 8px;
}

a {
    color: var(--fg);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: var(--fg-muted);
}

a:hover {
    text-decoration-color: var(--fg);
}

.lang-switch {
    text-align: right;
    margin-bottom: 24px;
    color: var(--fg-muted);
    font-size: 13px;
}

.lang-switch a {
    color: var(--fg-dim);
    margin-left: 8px;
}

.muted {
    color: var(--fg-muted);
    font-size: 14px;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 80px 0;
}

footer {
    text-align: center;
    color: var(--fg-muted);
    font-size: 13px;
    margin-top: 80px;
}

footer a {
    color: var(--fg-dim);
}