* { box-sizing: border-box; }
html { color-scheme: light; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: #fff; color: #111; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible { outline: 3px solid #111; outline-offset: 5px; }
button { font: inherit; }
.skip_link { position: absolute; top: -100px; left: 1rem; z-index: 10; background: #fff; color: #111; padding: .75rem 1rem; }
.skip_link:focus { top: 1rem; }
.sr_only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: .85rem 1.25rem; border: 1px solid #111; background: #111; color: #fff; text-decoration: none; line-height: 1.25; font-weight: 600; }
.button:hover { background: #333; text-decoration: none; }
.button.secondary { color: #111; background: #fff; }
.button.secondary:hover { background: #f3f3f3; }
button:disabled { cursor: not-allowed; }
.button:disabled { color: #666; background: #f3f3f3; border-color: #aaa; }
.text_connection { border: 0; background: none; padding: .5rem 0; color: #555; font-size: inherit; text-align: left; text-decoration: underline; text-underline-offset: .2em; }
.text_connection:disabled { text-decoration: none; }
.setup_note { color: #555; font-size: .85rem; line-height: 1.5; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; align-items: center; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }
@media print { .skip_link, .setup_note, .site_nav, button:disabled { display: none; } body { font-size: 12pt; } a { color: #000; } }

body { font-family: Arial, Helvetica, sans-serif; font-size: 18px; line-height: 1.6; }
.page { width: min(900px, calc(100% - 80px)); margin-inline: auto; }
.site_header { padding-top: 36px; }
.brand img { width: 100%; }
.site_nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding: 12px 0 20px; border-bottom: 2px solid #111; font-size: .8rem; }
.site_nav a { padding-block: .4rem; }
.hero { padding: 38px 0 35px; }
.eyebrow { font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace; font-size: .77rem; text-transform: uppercase; letter-spacing: .06em; margin: 0 0 .6rem; }
h1 { font-size: clamp(2.7rem, 6.1vw, 4.5rem); line-height: 1.02; letter-spacing: -.055em; margin: 0 0 22px; }
.proposal { font-size: clamp(1.5rem, 3.3vw, 2.2rem); line-height: 1.24; letter-spacing: -.025em; max-width: 810px; font-weight: 700; margin: 0 0 18px; }
.hero_tail { font-size: 1.1rem; margin: 0; }
.boundary { padding: 20px 24px; border: 2px solid #111; }
.boundary h2 { font-size: 1.15rem; margin: 0 0 .5rem; }
.boundary p { font-size: .94rem; margin: 0; line-height: 1.65; }
.section { padding: 38px 0; border-bottom: 1px solid #aaa; }
h2 { font-size: 1.6rem; line-height: 1.2; letter-spacing: -.025em; margin: 0 0 1.3rem; }
h3 { font-size: 1.04rem; margin: 0 0 .5rem; }
p { margin-top: 0; }
.ration_statement { font-size: clamp(1.9rem, 4vw, 2.8rem); line-height: 1.2; letter-spacing: -.035em; font-weight: 700; margin-bottom: 20px; }
.ration_statement span { display: block; }
.two_column { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; }
.two_column p { font-size: 1rem; margin-bottom: 0; }
.math { font-family: ui-monospace, 'SFMono-Regular', Consolas, monospace; padding: 22px 0; border-top: 1px solid #aaa; border-bottom: 1px solid #aaa; }
.math_inputs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 24px; }
.math_inputs dt { font-size: .7rem; color: #555; margin-bottom: .3rem; }
.math_inputs dd { font-size: 2rem; line-height: 1.2; margin: 0; }
.math_result { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 24px; }
.math_result p { margin: 0; }
.math_result strong { font-size: 4.1rem; letter-spacing: -.07em; line-height: 1; }
.small { font-size: .84rem; color: #555; line-height: 1.6; }
.math_note { margin: 15px 0 0; }
.punchline { font-size: 1.25rem; font-weight: 700; margin: 20px 0 0; }
.questions { display: grid; grid-template-columns: 1fr 1fr; gap: 30px 40px; }
.questions p { font-size: .97rem; margin: 0; }
.publication_links { margin: 1.2rem 0 0; padding-left: 1.2rem; }
.publication_links:empty { display: none; }
.publication_links li { margin-block: .8rem; }
.publication_links small { display: block; font-size: .84rem; color: #555; }
.last_line { font-weight: 700; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.1; margin: 36px 0; letter-spacing: -.04em; }
.site_footer { border-top: 2px solid #111; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 25px; padding: 18px 0 28px; font-size: .8rem; align-items: center; }
.footer_links { display: flex; flex-wrap: wrap; gap: 20px; }
@media (max-width: 600px) {
 body { font-size: 17px; }
 .page { width: calc(100% - 36px); }
 .site_header { padding-top: 22px; }
 .site_nav { padding-top: 10px; padding-bottom: 12px; gap: .4rem 1rem; }
 .hero { padding-top: 30px; }
 .boundary { padding: 17px; }
 .two_column, .questions { grid-template-columns: 1fr; gap: 24px; }
 .math_inputs { gap: 10px; }
 .math_inputs dt { min-height: 2.8em; }
 .math_inputs dd { font-size: 1.7rem; }
 .math_result { gap: 8px 20px; }
 .section { padding-block: 30px; }
 .site_footer { align-items: flex-start; flex-direction: column; }
}