:root { --bg: #F4F0E8; --ink: #1C1A16; --muted: #625A4D; --accent: #A84620; --accent-hover: #833A20; --on-accent: #fff; --line: #D8D0BF; --paper: #EDE8DC; --field-bg: #FAF7F0; --formula-bg: #FFF8ED; background: var(--bg); }
:root[data-theme="dark"] { --bg: #11100E; --ink: #F5F0E6; --muted: #B6AA9B; --accent: #F08A55; --accent-hover: #FFAB7A; --on-accent: #20150F; --line: #494036; --paper: #1B1916; --field-bg: #26221D; --formula-bg: #26221D; }
* { box-sizing: border-box; }
body { max-width: 940px; margin: 0 auto; padding: 26px clamp(18px,4vw,38px) 36px; font-family: system-ui, sans-serif; background: var(--bg); color: var(--ink); line-height: 1.75; }
[hidden] { display: none !important; }
a { color: var(--accent); text-underline-offset: 4px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, main:focus-visible, .table-scroll:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip-link { position: fixed; top: 8px; left: 12px; z-index: 10; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; background: var(--ink); color: var(--bg); }
.skip-link:focus { width: auto; height: auto; clip-path: none; padding: 12px 18px; }
.header-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.theme-toggle { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px 13px; border: 1px solid var(--line); border-radius: 4px; background: var(--paper); color: var(--ink); font: 500 12px system-ui, sans-serif; cursor: pointer; }
.theme-toggle:hover { border-color: var(--accent); }
.theme-icon { display: flex; }
.theme-icon svg { width: 16px; height: 16px; }
.service-page { max-width: 940px; }
main { min-width: 0; }
h1, h2 { font-family: Georgia, serif; line-height: 1.15; font-weight: 500; text-wrap: balance; }
h1 { max-width: 22ch; font-size: clamp(34px,5vw,54px); letter-spacing: -.035em; margin: 28px 0 22px; }
h2 { font-size: clamp(25px,3vw,32px); letter-spacing: -.02em; margin: 40px 0 14px; }
h3 { font-size: 18px; margin-top: 24px; }
p, li, dd { max-width: 68ch; }
p { margin: 0 0 18px; }
header, footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
header { border-bottom: 1px solid var(--line); padding-bottom: 22px; margin-bottom: 24px; }
header > a { color: var(--ink); text-decoration: none; }
header strong { font-family: Georgia, serif; font-size: 26px; letter-spacing: -.04em; }
header strong span { color: var(--accent); }
footer { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 44px; color: var(--muted); font-size: 13px; }
.nav-links { display: flex; flex-wrap: wrap; gap: 12px 20px; }
.nav-links a { font-size: 13px; color: var(--ink); text-decoration: none; }
.nav-links a:hover { color: var(--accent); text-decoration: underline; }
.muted { color: var(--muted); font-size: 13px; }
.box, .note { padding: 18px 20px; border-left: 3px solid var(--accent); background: var(--paper); line-height: 1.7; }
.formula { font-family: ui-monospace, Consolas, monospace; padding: 16px 18px; border: 1px solid var(--line); background: var(--formula-bg); overflow-wrap: anywhere; font-size: 14px; }
.table-scroll { overflow-x: auto; margin: 22px 0; }
table { width: 100%; min-width: 500px; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
td, th { border: 1px solid var(--line); padding: 12px 14px; text-align: left; vertical-align: top; }
th { background: var(--paper); font-weight: 600; }
.cta { display: inline-block; margin: 12px 0 24px; padding: 13px 20px; background: var(--accent); color: var(--on-accent); text-decoration: none; font-size: 14px; font-weight: 600; }
.cta:hover { background: var(--accent-hover); }
.link-grid { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0 24px; }
.link-grid a { padding: 10px 14px; border: 1px solid var(--line); background: var(--paper); text-decoration: none; font-size: 14px; }
.links, .footer-links { display: flex; flex-wrap: wrap; gap: 12px 18px; margin-top: 28px; }
.links { padding-top: 18px; border-top: 1px solid var(--line); }
.faq dt { font-weight: 600; margin-top: 22px; }
.faq dd { margin: 6px 0 0; color: var(--muted); }
.related-links { display: flex; flex-wrap: wrap; gap: 12px 22px; margin: 18px 0 30px; }
.related-links a { text-decoration: none; border-bottom: 1px solid var(--line); padding: 4px 0; font-size: 14px; }
.related-links a:hover { border-color: var(--accent); }
.guide-summary { font-size: 17px; line-height: 1.8; color: var(--muted); }
.guide-entry { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 24px; padding: 24px 0; margin: 26px 0 36px; border-block: 1px solid var(--line); }
.guide-entry .entry-eyebrow { color: var(--accent); font: 600 11px ui-monospace, monospace; letter-spacing: .06em; margin: 0 0 10px; }
.guide-entry h2 { font-size: 25px; margin: 0 0 12px; }
.guide-entry p { font-size: 13px; margin: 0 0 6px; }
.guide-entry small { color: var(--muted); font-size: 12px; }
.guide-entry .cta { margin: 0; max-width: 100%; transition: background .2s, transform .2s; }
.guide-entry .cta:active { transform: translateY(1px); }
.source-note { padding-top: 22px; border-top: 1px solid var(--line); margin-top: 35px; font-size: 12px; color: var(--muted); line-height: 1.8; }
@media(max-width:760px) { .guide-entry { grid-template-columns: minmax(0, 1fr); gap: 18px; } .guide-entry .cta { justify-self: start; } }
@media(prefers-reduced-motion:reduce) { .guide-entry .cta { transition: none; } }
@media(max-width:560px) { header { align-items: flex-start; flex-direction: column; } h1 { margin-top: 24px; } .box, .note { padding: 14px 16px; } }
@media(max-width:560px) { .header-tools { width: 100%; } .header-tools .nav-links { flex: 1; } }
@media print { :root[data-theme], :root { --bg: #fff; --ink: #000; --muted: #333; --accent: #000; --paper: #fff; --formula-bg: #fff; --field-bg: #fff; --line: #aaa; } .skip-link, .theme-toggle { display: none !important; } }