:root { color-scheme: light; --paper: #fffefb; --ink: #202020; --muted: #646464; --line: #e8e8e8; --red: #b91c1c; --lime: #e2f0bd; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 system-ui, sans-serif; }
main { max-width: 1120px; margin: auto; padding: 32px clamp(20px, 5vw, 64px); }
header { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 750; letter-spacing: -.04em; font-size: 21px; }
.tag, .eyebrow { font-size: 12px; font-weight: 650; letter-spacing: .08em; text-transform: uppercase; }
.tag { color: var(--red); }
.sample { margin: 24px 0; padding: 12px 16px; border: 1px solid var(--line); border-radius: 10px; background: #f9f9f9; color: var(--muted); font-size: 13px; }
.intro { margin: 48px 0 32px; }
.eyebrow { margin: 0 0 12px; color: var(--red); }
h1 { margin: 0; font-size: clamp(36px, 5vw, 56px); line-height: 1.12; letter-spacing: -.055em; }
.lede { margin: 16px 0 0; color: var(--muted); }
.calculator { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 40px; }
.inputs, .estimate { min-width: 0; padding: 32px; border: 1px solid var(--line); border-radius: 16px; background: white; }
h2 { margin: 0 0 24px; font-size: 19px; letter-spacing: -.02em; }
.field { margin-top: 20px; }
label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; }
input { width: 100%; min-height: 48px; padding: 10px 14px; border: 1px solid #bbbbbb; border-radius: 8px; background: white; color: var(--ink); font: inherit; }
:focus-visible { outline: 3px solid var(--red); outline-offset: 4px; }
[aria-invalid="true"] { border-color: var(--red); }
.field p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
.error { min-height: 24px; margin: 20px 0 0; color: var(--red); font-size: 13px; }
.estimate { display: flex; flex-direction: column; background: var(--lime); border-color: var(--lime); }
.estimate h2 { margin: 0 0 16px; font-size: 16px; }
#total { display: block; font-size: clamp(30px, 4.5vw, 48px); line-height: 1.2; font-weight: 750; letter-spacing: -.04em; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
dl { margin: 32px 0; padding: 12px 0; border-top: 1px solid #c2d79b; border-bottom: 1px solid #c2d79b; }
dl div { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; padding: 8px 0; font-size: 14px; }
dd { margin: 0; font-weight: 650; font-variant-numeric: tabular-nums; }
.formula { margin: 0 0 24px; font-size: 14px; }
.note { margin: auto 0 0; color: #3f6212; font-size: 12px; }
footer { padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
footer p { margin: 0; }
@media (max-width: 680px) { .calculator { grid-template-columns: 1fr; gap: 16px; } .inputs, .estimate { padding: 24px; } .intro { margin-top: 32px; } .tag { max-width: 100px; text-align: right; font-size: 10px; } }