:root { color-scheme: light; --ink: #192b33; --muted: #495c66; --paper: #fff; --canvas: #f4f7f6; --accent: #075d58; --line: #ccd8d4; }
* { box-sizing: border-box; }
html { scroll-padding-top: 1rem; }
body { margin: 0; color: var(--ink); background: var(--canvas); font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif; line-height: 1.9; }
a { color: var(--accent); text-underline-offset: .2em; overflow-wrap: anywhere; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 2px; }
.skip-link { position: absolute; top: -10rem; left: 1rem; padding: .5rem 1rem; background: var(--paper); z-index: 10; }
.skip-link:focus { top: 1rem; }
.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.header-inner { max-width: 72rem; margin: auto; padding: 1rem 2rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 2rem; }
.brand { color: var(--ink); text-decoration: none; font-size: 1.2rem; font-weight: 700; letter-spacing: .06em; }
nav ul { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; list-style: none; margin: 0; padding: 0; }
nav a { display: inline-block; padding: .25rem 0; }
nav a[aria-current="page"] { font-weight: 700; }
main { max-width: 52rem; margin: 3rem auto; padding: 2.5rem 3rem; background: var(--paper); border: 1px solid var(--line); border-radius: 12px; }
.eyebrow { color: var(--muted); margin: 0 0 .5rem; font-size: .875rem; font-weight: 700; letter-spacing: .06em; }
h1 { margin: 0 0 1.5rem; font-size: clamp(1.65rem, 4vw, 2.25rem); line-height: 1.5; letter-spacing: .015em; }
h2 { margin: 3rem 0 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: 1.25rem; line-height: 1.6; }
h3 { margin: 2rem 0 .75rem; font-size: 1.05rem; line-height: 1.7; }
p { margin: 1rem 0; overflow-wrap: anywhere; }
li { margin: .5rem 0; }
.contents { padding: 1rem 1.5rem; margin: 2rem 0; background: var(--canvas); border-radius: 6px; }
.contents p { margin: 0; font-weight: 700; }
.contents ol { margin: .75rem 0 0; padding-left: 1.5rem; }
.site-footer { max-width: 52rem; margin: 0 auto 2rem; padding: 0 1.25rem; color: var(--muted); font-size: .875rem; }
.site-footer a { margin-right: 1.5rem; }
@media (max-width: 640px) { .header-inner { padding: 1rem 1.25rem; } main { margin: 1.25rem .75rem; padding: 1.75rem 1.25rem; border-radius: 8px; } h2 { margin-top: 2rem; } }
@media print { body { background: white; } main { border: 0; padding: 0; margin: 0; max-width: none; } .site-header, .site-footer, .skip-link, .contents { display: none; } a { color: inherit; } }