@font-face { font-family: 'DM Sans'; font-style: normal; font-weight: 400; font-display: swap; src: url('/assets/dm-sans-regular.ttf') format('truetype'); }
@font-face { font-family: 'DM Sans'; font-style: normal; font-weight: 500 700; font-display: swap; src: url('/assets/dm-sans-medium.ttf') format('truetype'); }
@font-face { font-family: 'Space Grotesk'; font-style: normal; font-weight: 500; font-display: swap; src: url('/assets/space-grotesk-medium.ttf') format('truetype'); }
:root { --ink: #122b40; --muted: #455e6f; --accent: #087391; --line: #d7e1e7; --paper: #f3f7f9; }
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #fff; font: 400 17px/1.7 'DM Sans', sans-serif; }
a { color: var(--accent); text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.shell { width: min(1180px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: absolute; left: 16px; top: -100px; padding: 12px; background: white; z-index: 10; }
.skip-link:focus { top: 12px; }
.site-header, .site-footer { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-block: 24px; }
.site-header { border-bottom: 1px solid var(--line); }
.site-header nav, .site-footer nav { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; font-size: 14px; }
.site-header nav a, .site-footer nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; }
.wordmark { font: 500 42px/1 'Space Grotesk', sans-serif; letter-spacing: -.065em; color: var(--ink); text-decoration: none; }
.brand-k { position: relative; display: inline-block; color: transparent; }
.brand-k::before, .brand-k::after { content: ''; position: absolute; left: 0; top: 0; width: 1em; height: 1em; }
.brand-k::before { background: #0f1b2e; clip-path: polygon(7.75% 14.5%,17.625% 14.5%,17.625% 60%,23.06% 54.56%,52.875% 84.375%,40.125% 84.375%,17.625% 61.875%,17.625% 84.375%,7.75% 84.375%); }
.brand-k::after { background: #0a8dbf; clip-path: polygon(38.75% 35.25%,52% 35.25%,31.06% 56.19%,24.44% 49.56%); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 16px; min-height: 48px; padding: 12px 20px; background: var(--ink); color: #fff; border: 1px solid var(--ink); border-radius: 6px; text-decoration: none; font-size: 15px; font-weight: 500; text-align: center; }
.button:hover { background: #214761; }
.text-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; font-weight: 500; }
h1, h2, h3 { color: var(--ink); font-weight: 500; line-height: 1.16; letter-spacing: -.035em; text-wrap: balance; }
h1 { font-size: clamp(38px, 4.7vw, 66px); margin: 12px 0 24px; }
h2 { font-size: clamp(28px, 3vw, 38px); margin: 0 0 20px; }
h3 { font-size: 23px; margin: 28px 0 12px; }
p { margin-block: 16px; }
.eyebrow, .meta, .fine-print { font-size: 13px; }
.eyebrow { color: var(--accent); letter-spacing: .07em; font-weight: 500; }
.meta, .fine-print, .dek, .library-intro p { color: var(--muted); }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 14px; padding-block: 24px; font-size: 14px; }
.breadcrumbs a { display: inline-flex; min-height: 36px; align-items: center; }
.guide-intro { max-width: 940px; padding: 20px 0 40px; }
.guide-intro .dek { font-size: clamp(19px, 2.2vw, 23px); line-height: 1.55; max-width: 840px; }
.meta { margin-block: 24px 0; }
.guide-layout { display: grid; grid-template-columns: 225px minmax(0, 1fr); gap: 64px; align-items: start; padding-bottom: 80px; border-top: 1px solid var(--line); }
.contents { padding-top: 32px; }
.contents h2 { font-size: 14px; margin-bottom: 12px; letter-spacing: 0; }
.contents ol { padding: 0; list-style: none; margin: 0; }
.contents a { display: block; padding: 9px 0; font-size: 14px; line-height: 1.45; text-decoration: none; color: var(--muted); }
.contents a:hover { color: var(--accent); text-decoration: underline; }
.contents .download-link { margin-top: 14px; border-top: 1px solid var(--line); padding-top: 20px; color: var(--accent); }
.guide-body { min-width: 0; max-width: 780px; }
.guide-body > section { padding-block: 38px 8px; }
.guide-body > section + section { margin-top: 26px; border-top: 1px solid var(--line); }
.guide-body li { margin-block: 10px; }
.guide-body ul, .guide-body ol { padding-left: 24px; }
.guide-body strong { font-weight: 500; }
.guide-body code { overflow-wrap: anywhere; font-size: .88em; background: var(--paper); padding: 2px 4px; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; margin-block: 24px; }
table { border-collapse: collapse; width: 100%; min-width: 580px; font-size: 15px; line-height: 1.5; }
th, td { padding: 15px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); overflow-wrap: anywhere; }
th { font-weight: 500; background: var(--paper); }
tr:last-child td { border-bottom: 0; }
.worksheet { margin-top: 36px; padding: 28px; border: 1px solid #c7dce5; border-left: 3px solid var(--accent); background: linear-gradient(115deg, #f1f8fa, #fff); border-radius: 4px; }
.worksheet h2 { font-size: 25px; }
.worksheet .fine-print { margin-bottom: 0; }
.sources a { overflow-wrap: anywhere; }
.guide-cta { margin-top: 44px; padding: clamp(24px, 4vw, 40px); border-radius: 8px; background: var(--ink); color: #fff; }
.guide-cta h2 { color: #fff; font-size: clamp(28px, 3vw, 36px); }
.guide-cta p { color: #d9e5ec; }
.guide-cta .button { color: var(--ink); background: #fff; border-color: #fff; }
.guide-cta .button:hover { background: #e5f1f6; }
.related-links { display: grid; gap: 12px; padding-bottom: 20px; }
.related-links a { min-height: 44px; display: flex; align-items: center; border-bottom: 1px solid var(--line); padding-block: 12px; }
.library-intro { padding: 72px 0 48px; max-width: 930px; }
.library-intro .dek { font-size: clamp(20px, 2.2vw, 25px); max-width: 800px; }
.start-here { padding-block: 36px 64px; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.feature { display: flex; flex-direction: column; padding: 32px; border: 1px solid var(--line); border-radius: 8px; background: linear-gradient(155deg, #f0f7fa, #fff 70%); }
.feature .number { font: 500 18px/1 'Space Grotesk', sans-serif; color: var(--accent); margin-bottom: 24px; }
.feature h3 { font-size: clamp(26px, 3vw, 33px); margin: 0; }
.feature p { color: var(--muted); }
.feature .feature-action { margin-top: auto; padding-top: 12px; }
.feature .fine-print { margin-bottom: 0; }
.library-map { padding: 42px 0 64px; border-top: 1px solid var(--line); }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-block: 32px 44px; }
.principles h3 { font-size: 21px; margin: 0 0 12px; }
.principles p { color: var(--muted); }
.topic-group { display: grid; grid-template-columns: 1fr 2fr; gap: 64px; padding-block: 32px; border-top: 1px solid var(--line); }
.topic-group h3 { font-size: 24px; margin: 12px 0; }
.topic-group ul { list-style: none; padding: 0; margin: 0; }
.topic-group a { display: flex; justify-content: space-between; gap: 24px; align-items: center; min-height: 52px; padding: 12px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.topic-group li:last-child a { border-bottom: 0; }
.topic-group a:hover { text-decoration: underline; }
.library-cta { margin: 0 0 64px; max-width: 880px; }
.site-footer { border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.site-footer p { margin: 0; }
@media (max-width: 1000px) {
  .shell { width: calc(100% - 56px); }
  .guide-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 32px; }
  .topic-group { gap: 32px; }
}
@media (max-width: 760px) {
  .shell { width: calc(100% - 40px); }
  .site-header, .site-footer { flex-wrap: wrap; }
  .site-header nav { gap: 18px; }
  .guide-intro { padding-top: 4px; }
  .guide-layout { display: block; }
  .contents { padding-block: 24px; border-bottom: 1px solid var(--line); }
  .contents ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
  .guide-body > section { padding-top: 28px; }
  .worksheet { padding: 24px; }
  .feature-grid, .principles, .topic-group { grid-template-columns: 1fr; }
  .feature { padding: 26px; }
  .library-intro { padding-top: 40px; }
  .topic-group { gap: 4px; }
  .principles { gap: 14px; }
  .principles p { margin-top: 8px; }
}
@media (max-width: 480px) {
  .site-header { gap: 16px; padding-top: 20px; }
  .site-header nav { width: 100%; justify-content: space-between; gap: 10px; font-size: 13px; }
  .site-header .button { padding-inline: 12px; font-size: 12px; }
  .contents ol { display: block; }
  .guide-body { font-size: 16px; }
  .site-footer nav { gap: 20px; }
}
@media print {
  .site-header nav, .site-footer, .contents, .guide-cta, .skip-link { display: none; }
  .shell { width: 100%; }
  .guide-layout { display: block; }
  .guide-body { max-width: none; }
  .table-scroll { overflow: visible; }
  table { min-width: 0; }
  .worksheet, .guide-body section { break-inside: avoid; }
}