:root {
  --ink: #10252d;
  --ink-soft: #25424a;
  --paper: #f4f0e8;
  --paper-light: #fffdf8;
  --paper-dark: #e4ddd1;
  --amber: #efb84d;
  --amber-soft: #f7d995;
  --coral: #d85b48;
  --blue: #5b91ac;
  --line: #b9b0a2;
  --muted: #5b6767;
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --body: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); scroll-behavior: smooth; }
body { margin: 0; max-width: 100%; overflow-x: hidden; background: var(--paper); color: var(--ink); font-family: var(--body); font-size: 16px; line-height: 1.58; text-rendering: optimizeLegibility; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid var(--coral); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 20; top: .75rem; left: .75rem; transform: translateY(-180%); min-height: 44px; padding: .7rem 1rem; background: var(--amber); color: var(--ink); font-weight: 800; text-decoration: none; }
.skip-link:focus { transform: translateY(0); }
.masthead { position: relative; overflow: hidden; background: var(--ink); color: var(--paper-light); }
.masthead::after { position: absolute; right: -10rem; bottom: -20rem; width: 40rem; height: 40rem; border: 1px solid rgba(239,184,77,.28); border-radius: 50%; box-shadow: 0 0 0 3rem rgba(239,184,77,.07), 0 0 0 7rem rgba(239,184,77,.04); content: ""; pointer-events: none; }
.topbar, .hero, .section, .site-footer { width: min(1240px, calc(100% - 3rem)); margin-inline: auto; }
.topbar { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; min-height: 4.5rem; border-bottom: 1px solid rgba(255,253,248,.25); }
.brand { display: inline-flex; align-items: center; min-height: 44px; font-family: var(--mono); font-size: .72rem; font-weight: 700; letter-spacing: .14em; line-height: 1.2; text-decoration: none; }
.brand span { color: var(--amber); }
.language-switch { display: flex; align-items: center; gap: .45rem; font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; }
.language-switch a { display: inline-flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; padding: .75rem .1rem; text-decoration: none; }
.language-switch a:hover, .language-switch .is-current { color: var(--amber); }
.language-switch .is-current { border-bottom: 2px solid var(--amber); }
.hero { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.14fr) minmax(19rem, .86fr); gap: clamp(2rem, 6vw, 7rem); align-items: end; padding-block: clamp(4rem, 7vw, 7rem); }
.hero-copy { min-width: 0; }
.eyebrow, .section-kicker, .answer-label, .trust-line, .mark-heading, .calc-tag, .source-card-kicker, .boundary-card-kicker, .board-head, .card-no { font-family: var(--mono); font-size: .68rem; font-weight: 800; letter-spacing: .13em; line-height: 1.35; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: .65rem; margin: 0 0 1.2rem; color: var(--amber); }
.eyebrow-mark { width: 2.5rem; height: .45rem; border-top: 2px solid var(--amber); border-bottom: 2px solid var(--coral); }
h1, h2, h3, p { max-width: 70ch; }
h1, h2, h3 { margin-top: 0; font-family: var(--display); font-weight: 700; letter-spacing: -.045em; }
h1 { max-width: 13ch; margin-bottom: 1.25rem; font-size: clamp(3rem, 7vw, 6.6rem); line-height: .93; }
h2 { margin-bottom: 1rem; font-size: clamp(2.25rem, 4vw, 4.2rem); line-height: .98; }
h3 { margin-bottom: .55rem; font-size: 1.55rem; line-height: 1.08; }
p { margin: 0 0 1rem; }
.deck { max-width: 62ch; color: #e9e5dc; font-size: clamp(1.05rem, 1.4vw, 1.25rem); line-height: 1.5; }
.trust-line { max-width: 70ch; margin-top: 1.4rem; color: #b9c5c4; letter-spacing: .05em; text-transform: none; }
.trust-line strong { color: var(--amber); }
.answer-strip { max-width: 58rem; margin-top: 2rem; padding: 1rem 1.25rem 1.1rem; border-left: 4px solid var(--amber); background: rgba(255,253,248,.09); }
.answer-label { color: var(--amber); }
.answer-strip p { margin: .35rem 0 0; color: var(--paper-light); }
.text-link { display: inline-flex; min-height: 44px; align-items: center; gap: .45rem; color: var(--ink); font-weight: 800; text-decoration-thickness: 2px; text-underline-offset: .22em; }
.masthead .text-link { color: var(--paper-light); }
.hero-link { margin-top: 1.25rem; }
.hero-mark { position: relative; min-height: 31rem; padding: 1.35rem; border: 1px solid rgba(255,253,248,.38); background: linear-gradient(145deg, rgba(255,253,248,.1), rgba(255,253,248,.02)); }
.hero-mark::before { position: absolute; inset: 2.7rem 2.7rem 3.3rem; border: 1px dashed rgba(239,184,77,.45); content: ""; pointer-events: none; }
.mark-heading { position: relative; z-index: 1; display: flex; justify-content: space-between; color: var(--amber); }
.gate { position: relative; z-index: 1; display: grid; grid-template-columns: 3rem 1fr; gap: .65rem; align-items: center; margin-top: 2.3rem; padding: .8rem 1rem; border: 1px solid rgba(255,253,248,.3); background: var(--paper-light); color: var(--ink); }
.gate::after { position: absolute; right: 1rem; bottom: -.95rem; width: 1px; height: 1rem; background: var(--amber); content: ""; }
.gate:last-of-type::after { display: none; }
.gate--allocation { margin-left: 2rem; background: var(--amber-soft); }
.gate--authorisation { margin-left: 4rem; background: #f4c4b8; }
.gate-number { display: grid; width: 2.3rem; height: 2.3rem; place-items: center; border: 1px solid var(--ink); border-radius: 50%; font-family: var(--mono); font-size: .75rem; font-weight: 800; }
.gate strong { display: block; font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; }
.gate small { grid-column: 2; margin-top: -.55rem; color: var(--muted); }
.hero-mark-note { position: absolute; right: 1.35rem; bottom: 1rem; max-width: 15rem; margin: 0; color: #dbe4e0; font-family: var(--mono); font-size: .72rem; text-align: right; }
.hero-mark-note strong { color: var(--amber); }
.section { padding-block: clamp(4rem, 8vw, 8rem); }
.section + .section { border-top: 1px solid var(--line); }
.section-kicker { display: flex; gap: .7rem; align-items: center; margin-bottom: 2.3rem; color: var(--coral); }
.section-kicker span { color: var(--muted); }
.section-grid { display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: clamp(2rem, 7vw, 8rem); }
.section-grid--wide { grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); }
.section-grid--answer { align-items: start; }
.lead { font-size: clamp(1.08rem, 1.5vw, 1.28rem); line-height: 1.5; }
.mechanism-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.mechanism-list li { display: grid; grid-template-columns: 3.3rem 1fr; gap: 1rem; padding: 1.1rem 0; border-top: 1px solid var(--line); }
.mechanism-list li:last-child { border-bottom: 1px solid var(--line); }
.mechanism-list p { margin: .25rem 0 0; color: var(--muted); }
.step-number { display: grid; width: 2.55rem; height: 2.55rem; place-items: center; border: 2px solid var(--coral); border-radius: 50%; color: var(--coral); font-family: var(--mono); font-size: .72rem; font-weight: 800; }
.gate-board { margin: 0; padding: 1.1rem; background: var(--ink); color: var(--paper-light); }
.board-head { display: flex; justify-content: space-between; padding: .55rem .65rem 1rem; border-bottom: 1px solid rgba(255,253,248,.3); color: var(--amber); }
.board-head strong { font-family: var(--body); font-size: .95rem; letter-spacing: 0; text-transform: none; }
.board-row { display: grid; grid-template-columns: 2.4rem 1fr auto; gap: 1rem; align-items: center; padding: 1.05rem .65rem; border-bottom: 1px solid rgba(255,253,248,.2); }
.board-index { color: var(--amber); font-family: var(--mono); font-size: .76rem; }
.board-row strong { display: block; font-family: var(--display); font-size: 1.35rem; }
.board-row small { display: block; color: #b9c5c4; }
.board-row b { color: var(--amber-soft); font-family: var(--mono); font-size: clamp(.78rem, 1.5vw, 1rem); white-space: nowrap; }
.gate-board figcaption { padding: 1rem .65rem .2rem; color: #cbd5d1; font-size: .9rem; }
.next-question { margin: 3rem 0 0; padding-top: 1rem; border-top: 2px solid var(--coral); font-size: 1.06rem; }
.next-question span { display: block; margin-bottom: .35rem; color: var(--coral); }
.range-label { display: flex; justify-content: space-between; gap: 1rem; margin: 2rem 0 .75rem; font-family: var(--mono); font-size: .8rem; font-weight: 800; text-transform: uppercase; }
.range-label output { color: var(--coral); }
input[type="range"] { width: 100%; min-height: 44px; accent-color: var(--coral); cursor: pointer; }
.small-note { color: var(--muted); font-size: .9rem; }
.calculator-card { padding: 1rem; border: 2px solid var(--ink); background: var(--paper-light); box-shadow: .55rem .55rem 0 var(--amber); }
.calc-card-head { display: flex; justify-content: space-between; gap: 1rem; padding: .7rem; background: var(--ink); color: var(--amber); font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; }
.calc-card-head strong { color: var(--paper-light); font-size: .9rem; }
.calc-line { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 1.1rem .7rem; border-bottom: 1px solid var(--line); }
.calc-line > div { min-width: 0; }
.calc-line strong { display: block; font-family: var(--display); font-size: 1.4rem; }
.calc-line small { color: var(--muted); }
.calc-line output { color: var(--coral); font-family: var(--mono); font-size: clamp(.9rem, 2vw, 1.2rem); font-weight: 800; text-align: right; white-space: nowrap; }
.calc-tag { display: block; margin-bottom: .2rem; color: var(--blue); }
.calc-line--open output { color: var(--ink-soft); }
.calc-warning { margin-top: 1rem; padding: .85rem; border-left: 4px solid var(--coral); background: #f4c4b8; }
.exception-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.exception-card { min-height: 14rem; padding: 1.25rem; border: 1px solid var(--line); background: var(--paper-light); }
.exception-card--warm { background: var(--amber-soft); }
.exception-card--blue { background: #c5dce4; }
.card-no { display: inline-grid; width: 2rem; height: 2rem; place-items: center; margin-bottom: 1rem; border: 1px solid var(--ink); border-radius: 50%; }
.exception-card p { margin-bottom: .8rem; }
.exception-card small { color: var(--muted); }
.boundary-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(18rem, .75fr); gap: clamp(2rem, 7vw, 8rem); align-items: start; }
.boundary-card { padding: 1rem; border: 1px solid var(--ink); background: var(--paper-light); }
.boundary-card-kicker { margin: .3rem .5rem 1rem; color: var(--coral); }
.boundary-line { display: grid; grid-template-columns: 2.2rem 1fr; gap: .65rem; align-items: center; padding: .75rem .5rem; border-top: 1px solid var(--line); }
.boundary-line strong, .boundary-line small { display: block; }
.boundary-line small { color: var(--muted); }
.boundary-check, .boundary-question { display: grid; width: 1.7rem; height: 1.7rem; place-items: center; border-radius: 50%; font-family: var(--mono); font-weight: 800; }
.boundary-check { background: var(--amber); }
.boundary-question { border: 2px solid var(--coral); color: var(--coral); }
.non-goal { margin-top: 2.5rem; padding: 1rem 1.25rem; border-left: 4px solid var(--amber); background: var(--paper-dark); }
.source-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(16rem, .62fr); gap: clamp(2rem, 7vw, 8rem); }
.source-list { display: grid; gap: 1rem; margin: 2rem 0 0; padding: 0; list-style: none; }
.source-list li { padding-top: 1rem; border-top: 1px solid var(--line); }
.source-list strong, .source-list small { display: block; }
.source-list a { text-decoration-thickness: 2px; text-underline-offset: .2em; }
.source-list small { margin-top: .3rem; color: var(--muted); }
.source-card { align-self: start; padding: 1.25rem; background: var(--ink); color: var(--paper-light); }
.source-card-kicker { color: var(--amber); }
.source-card dl { margin: 1.3rem 0 0; }
.source-card dl div { display: grid; grid-template-columns: 5.5rem 1fr; gap: .8rem; padding: .75rem 0; border-top: 1px solid rgba(255,253,248,.25); }
.source-card dt { color: #b9c5c4; }
.source-card dd { margin: 0; }
.source-disclaimer { margin-top: 2rem; color: var(--muted); font-size: .9rem; }
.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding-block: 3rem 4rem; }
.site-footer p { max-width: 34rem; color: var(--muted); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 1rem 1.4rem; align-content: start; }
.footer-links a { min-height: 44px; padding-top: .55rem; font-weight: 700; }
.not-found { width: min(760px, calc(100% - 3rem)); margin: 12vh auto; }
.not-found h1 { max-width: 15ch; color: var(--ink); }
.button-link { display: inline-flex; min-height: 44px; align-items: center; padding: .7rem 1rem; background: var(--ink); color: var(--paper-light); font-weight: 800; text-decoration: none; }
.not-found .text-link { margin-left: 1rem; }
@media (max-width: 800px) { .hero, .section-grid, .section-grid--wide, .boundary-grid, .source-grid { grid-template-columns: 1fr; gap: 2rem; } .hero { padding-block: 3.5rem 4rem; } .hero-mark { min-height: 25rem; } .exception-grid { grid-template-columns: 1fr; } .site-footer { display: block; } .footer-links { justify-content: flex-start; margin-top: 1rem; } }
@media (max-width: 520px) { .topbar, .hero, .section, .site-footer { width: min(100% - 2rem, 1240px); } h1 { font-size: clamp(2.8rem, 14vw, 4.8rem); } h2 { font-size: 2.45rem; } .hero-mark { min-height: 24rem; padding: .9rem; } .hero-mark::before { inset: 2.4rem 1.3rem 3rem; } .gate { grid-template-columns: 2.45rem 1fr; margin-top: 1.45rem; padding: .7rem; } .gate--allocation { margin-left: .7rem; } .gate--authorisation { margin-left: 1.4rem; } .board-row { grid-template-columns: 1.8rem 1fr; gap: .65rem; } .board-row b { grid-column: 2; } .calc-line { align-items: start; } .calc-line output { max-width: 8rem; white-space: normal; } .source-card dl div { grid-template-columns: 5rem 1fr; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }