:root { color-scheme: light; --paper: #f4f1e8; --ink: #19251e; --green: #275f44; --line: #c7cdc2; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 2rem; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 1.08rem/1.65 system-ui, sans-serif; }
a { color: var(--green); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--green); outline-offset: 5px; }
header, main, footer { width: min(900px, calc(100% - 3rem)); margin: auto; }
header { display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid var(--ink); padding: 1.3rem 0; gap: 1rem; }
.brand, .code, .eyebrow, .number, nav, .address, .signoff { font-family: ui-monospace, Consolas, monospace; }
.brand { font-size: 1.15rem; font-weight: 800; text-decoration: none; letter-spacing: .12em; }
.code { background: var(--ink); color: var(--paper); padding: .2rem .6rem; white-space: nowrap; }
.eyebrow { margin: 3.5rem 0 1.1rem; color: var(--green); }
h1 { font-size: clamp(3.8rem, 10vw, 6rem); line-height: 1; letter-spacing: -.055em; margin: 0 0 1.6rem; font-weight: 750; }
.intro { font-size: 1.25rem; }
.opening { border-left: 3px solid var(--green); padding-left: 1rem; margin: 2rem 0; font-size: .95rem; }
nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: .7rem 2rem; padding: 1.5rem 0 2.5rem; }
nav a { font-size: .95rem; }
section { padding: 2.3rem 0 2.8rem; border-top: 1px solid var(--line); }
.number { font-size: .78rem; color: var(--green); letter-spacing: .1em; margin: 0 0 .8rem; }
h2 { font-size: clamp(1.55rem, 4vw, 2rem); line-height: 1.2; letter-spacing: -.025em; margin: 0 0 1.3rem; }
section p { max-width: 66ch; }
.address { display: block; width: fit-content; max-width: 100%; overflow-wrap: anywhere; border: 1px solid var(--line); background: #e5eadd; padding: .75rem 1rem; font-size: 1rem; }
.note { color: #49584d; font-size: .97rem; }
.signoff { font-size: .95rem; padding-top: 1rem; }
footer { border-top: 2px solid var(--ink); display: flex; justify-content: space-between; gap: 1rem; padding: 1.5rem 0 2rem; font-size: .85rem; }
.skip { position: absolute; top: -100px; left: 1rem; background: var(--paper); padding: .5rem; }
.skip:focus { top: .5rem; }
@media (max-width: 480px) { header, main, footer { width: calc(100% - 2rem); } nav { grid-template-columns: 1fr; } .code { font-size: .8rem; } footer { flex-direction: column; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }