/* ukreach.org — regulatory reference design system
   Ground: warm paper. Ink: near-black. Accent: deep regulatory green.
   Headings: Source Serif 4. Body: system sans. Hairline rules throughout. */

:root {
  --paper:      #faf8f5;
  --paper-2:    #f2efe9;
  --paper-3:    #e9e5dd;
  --ink:        #14161a;
  --ink-2:      #3d424b;
  --ink-3:      #6b7280;
  --rule:       #d9d4c9;
  --rule-2:     #c3bcae;
  --green:      #1e4d3d;
  --green-2:    #2d6b56;
  --green-pale: #e8f0ec;
  --amber:      #8a4a12;
  --amber-pale: #fbf1e4;

  --serif: "Source Serif 4", Charter, "Bitstream Charter", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --measure: 68ch;
  --wrap: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 24px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper); padding: 12px 18px; z-index: 100;
}
.skip:focus { left: 0; }

a { color: var(--green); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }

/* ------------------------------------------------------------- masthead */
.masthead {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: saturate(180%) blur(8px);
}
.masthead-in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; min-height: 76px; flex-wrap: wrap;
}
.brand { text-decoration: none; color: inherit; display: block; padding: 12px 0; }
.brand-mark {
  display: block;
  font-family: var(--serif); font-weight: 700; font-size: 25px;
  letter-spacing: -0.015em; line-height: 1.1;
}
.brand-sub {
  display: block; font-size: 11.5px; color: var(--ink-3);
  letter-spacing: 0.045em; text-transform: uppercase; margin-top: 2px;
}
.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; padding-bottom: 4px; }
.nav a {
  text-decoration: none; color: var(--ink-2); font-size: 15px; font-weight: 500;
  padding: 9px 13px; border-radius: 3px;
}
.nav a:hover { background: var(--paper-2); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--green); border-radius: 0; }
.nav-cta {
  background: var(--green); color: #fff !important; margin-left: 8px;
}
.nav-cta:hover { background: var(--ink) !important; }

/* ------------------------------------------------------------- typography */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 700; letter-spacing: -0.018em; color: var(--ink); }
h1 { font-size: clamp(2.15rem, 1.5rem + 2.4vw, 3.5rem); line-height: 1.08; margin: 0 0 22px; }
h2 { font-size: clamp(1.5rem, 1.2rem + 1.1vw, 2.05rem); line-height: 1.2; margin: 2.6em 0 0.6em; }
h3 { font-size: 1.22rem; line-height: 1.3; margin: 2em 0 0.5em; }
h4 { font-size: 1.02rem; margin: 1.6em 0 0.4em; font-weight: 600; }
p { margin: 0 0 1.15em; }
.prose > * { max-width: var(--measure); }
.prose > .full, .prose > table, .prose > .table-scroll, .prose > .grid,
.prose > .callout, .prose > .cards, .prose > .facts { max-width: none; }

.lede { font-size: 1.2rem; line-height: 1.58; color: var(--ink-2); max-width: 62ch; }
.eyebrow {
  font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--green-2); font-weight: 700; margin: 0 0 14px;
}

/* ------------------------------------------------------------- sections */
.section { padding: 74px 0; }
.section + .section { border-top: 1px solid var(--rule); }
.section-tight { padding: 46px 0; }
.band { background: var(--paper-2); }
.band-ink { background: var(--ink); color: var(--paper); }
.band-ink h1, .band-ink h2, .band-ink h3 { color: var(--paper); }
.band-ink a { color: #9fd3bf; }
.band-ink .lede { color: #b9bec7; }

/* ------------------------------------------------------------- hero */
.hero { padding: 84px 0 68px; border-bottom: 1px solid var(--rule); }
.hero h1 { max-width: 17ch; }
.hero .lede { margin-bottom: 34px; }

.page-head { padding: 62px 0 40px; border-bottom: 1px solid var(--rule); }
.page-head h1 { max-width: 20ch; }

.crumb { font-size: 13.5px; color: var(--ink-3); margin: 0 0 18px; }
.crumb a { color: var(--ink-3); text-decoration: none; }
.crumb a:hover { color: var(--green); text-decoration: underline; }

/* ------------------------------------------------------------- buttons */
.btn {
  display: inline-block; padding: 13px 24px; border-radius: 3px;
  font-size: 15.5px; font-weight: 600; text-decoration: none;
  border: 1px solid transparent; transition: background .15s, color .15s;
}
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--ink); color: #fff; }
.btn-ghost { border-color: var(--rule-2); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--paper-2); color: var(--ink); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* ------------------------------------------------------------- alert / callout */
.callout {
  border-left: 3px solid var(--amber);
  background: var(--amber-pale);
  padding: 20px 24px; margin: 30px 0; border-radius: 0 3px 3px 0;
}
.callout h3 { margin-top: 0; font-size: 1.05rem; }
.callout > :last-child { margin-bottom: 0; }
.callout-green { border-left-color: var(--green); background: var(--green-pale); }

/* ------------------------------------------------------------- key facts */
.facts {
  border: 1px solid var(--rule); border-radius: 4px; background: #fff;
  padding: 4px 26px; margin: 34px 0;
}
.facts dl { margin: 0; display: grid; grid-template-columns: minmax(150px, 220px) 1fr; }
.facts dt {
  font-size: 12.5px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 700; padding: 15px 20px 15px 0;
  border-bottom: 1px solid var(--paper-3);
}
.facts dd {
  margin: 0; padding: 15px 0; border-bottom: 1px solid var(--paper-3);
  font-size: 15.5px;
}
.facts dl > dt:last-of-type, .facts dl > dd:last-of-type { border-bottom: 0; }

/* ------------------------------------------------------------- tables */
.table-scroll { overflow-x: auto; margin: 30px 0; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: #fff; }
th, td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--rule); vertical-align: top; }
thead th {
  background: var(--paper-2); font-size: 12px; letter-spacing: 0.07em;
  text-transform: uppercase; color: var(--ink-2); border-bottom: 1.5px solid var(--rule-2);
  white-space: nowrap;
}
tbody tr:last-child td { border-bottom: 0; }
td code, .mono { font-family: var(--mono); font-size: 0.9em; }
.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ------------------------------------------------------------- grids */
.grid { display: grid; gap: 26px; margin: 34px 0; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }

.card {
  border: 1px solid var(--rule); background: #fff; border-radius: 4px;
  padding: 26px; display: flex; flex-direction: column;
}
.card h3 { margin: 0 0 10px; font-size: 1.14rem; }
.card p { color: var(--ink-2); font-size: 15.5px; margin-bottom: 14px; }
.card > :last-child { margin-bottom: 0; margin-top: auto; }
.card-link { font-size: 14.5px; font-weight: 600; text-decoration: none; }
.card-link::after { content: " →"; }
a.card { text-decoration: none; color: inherit; transition: border-color .15s, box-shadow .15s; }
a.card:hover { border-color: var(--green); box-shadow: 0 2px 14px rgba(30,77,61,.09); }

.card-num {
  font-family: var(--serif); font-size: 13px; font-weight: 700; color: var(--green-2);
  letter-spacing: .1em; margin-bottom: 12px; display: block;
}

/* ------------------------------------------------------------- stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); margin: 34px 0; }
.stat { background: var(--paper); padding: 26px 22px; }
.stat b { display: block; font-family: var(--serif); font-size: 2.1rem; line-height: 1; letter-spacing: -0.02em; }
.stat span { display: block; font-size: 13.5px; color: var(--ink-3); margin-top: 8px; }

/* ------------------------------------------------------------- lists */
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.35em; }
.prose li { margin-bottom: 0.5em; }
.prose li::marker { color: var(--ink-3); }

ul.checks { list-style: none; padding-left: 0; }
ul.checks li { padding-left: 30px; position: relative; margin-bottom: 0.72em; }
ul.checks li::before {
  content: ""; position: absolute; left: 6px; top: 0.66em;
  width: 9px; height: 9px; border-radius: 50%; background: var(--green-2);
}

/* ------------------------------------------------------------- next / prev */
.pager { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; margin-top: 12px; }
.pager a {
  border: 1px solid var(--rule); border-radius: 4px; padding: 20px 22px;
  text-decoration: none; color: inherit; background: #fff;
}
.pager a:hover { border-color: var(--green); }
.pager span { display: block; font-size: 11.5px; letter-spacing: .11em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 6px; }
.pager b { font-family: var(--serif); font-size: 1.05rem; }

/* ------------------------------------------------------------- faq */
.qa { border-top: 1px solid var(--rule); }
.qa details { border-bottom: 1px solid var(--rule); }
.qa summary {
  cursor: pointer; padding: 22px 40px 22px 0; position: relative;
  font-family: var(--serif); font-size: 1.14rem; font-weight: 600; list-style: none;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: "+"; position: absolute; right: 8px; top: 20px;
  font-size: 1.5rem; color: var(--green-2); font-family: var(--sans); line-height: 1;
}
.qa details[open] summary::after { content: "−"; }
.qa summary:hover { color: var(--green); }
.qa .qa-body { padding: 0 40px 24px 0; max-width: var(--measure); color: var(--ink-2); }
.qa .qa-body > :last-child { margin-bottom: 0; }

/* ------------------------------------------------------------- form */
.form { max-width: 640px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.field .hint { font-weight: 400; color: var(--ink-3); }
.field input, .field select, .field textarea {
  width: 100%; padding: 12px 14px; font: inherit; font-size: 15.5px;
  border: 1px solid var(--rule-2); border-radius: 3px; background: #fff; color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--green-2); outline-offset: 1px; border-color: var(--green-2);
}
.field textarea { min-height: 150px; resize: vertical; }
.hp { position: absolute; left: -9999px; }

/* ------------------------------------------------------------- pricing */
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(270px, 1fr)); gap: 24px; margin: 36px 0; }
.tier { border: 1px solid var(--rule); border-radius: 4px; background: #fff; padding: 30px 28px; display: flex; flex-direction: column; }
.tier-featured { border: 1.5px solid var(--green); box-shadow: 0 3px 20px rgba(30,77,61,.08); }
.tier h3 { margin: 0 0 4px; }
.tier .who { font-size: 13.5px; color: var(--ink-3); margin-bottom: 20px; }
.tier .amount { font-family: var(--serif); font-size: 2.2rem; font-weight: 700; letter-spacing: -0.025em; line-height: 1; }
.tier .unit { font-size: 13.5px; color: var(--ink-3); margin: 8px 0 22px; }
.tier ul { list-style: none; padding: 0; margin: 0 0 24px; font-size: 15px; }
.tier ul li { padding: 9px 0; border-top: 1px solid var(--paper-3); color: var(--ink-2); }
.tier .btn { margin-top: auto; text-align: center; }

/* ------------------------------------------------------------- footer */
.foot { border-top: 1px solid var(--rule); background: var(--paper-2); margin-top: 0; padding: 58px 0 0; }
.foot-in { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 40px; padding-bottom: 44px; }
.foot-col h2 {
  font-family: var(--sans); font-size: 11.5px; letter-spacing: .13em; text-transform: uppercase;
  color: var(--ink-3); margin: 0 0 16px; font-weight: 700;
}
.foot-col a { display: block; color: var(--ink-2); text-decoration: none; font-size: 15px; padding: 4px 0; }
.foot-col a:hover { color: var(--green); text-decoration: underline; }
.foot-org address { font-style: normal; font-size: 15px; color: var(--ink-2); margin-bottom: 14px; }
.foot-org p { font-size: 15px; color: var(--ink-2); margin-bottom: 12px; }
.foot-reg { font-size: 13px !important; color: var(--ink-3) !important; }
.foot-legal {
  border-top: 1px solid var(--rule); padding: 22px 24px; display: flex;
  justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.foot-legal p { font-size: 13px; color: var(--ink-3); margin: 0; max-width: 74ch; }
.foot-legal a { color: var(--ink-3); }

/* ------------------------------------------------------------- misc */
.tag {
  display: inline-block; font-size: 11.5px; font-weight: 700; letter-spacing: .07em;
  text-transform: uppercase; padding: 4px 9px; border-radius: 3px;
  background: var(--green-pale); color: var(--green); margin-right: 6px;
}
.tag-amber { background: var(--amber-pale); color: var(--amber); }
hr { border: 0; border-top: 1px solid var(--rule); margin: 44px 0; }
.updated { font-size: 13px; color: var(--ink-3); margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--rule); }

@media (max-width: 700px) {
  body { font-size: 16.5px; }
  .masthead { position: static; }
  .masthead-in { min-height: 0; padding-block: 12px; gap: 10px; }
  .nav { margin-left: -13px; }
  .section { padding: 52px 0; }
  .hero { padding: 52px 0 44px; }
  .facts dl { grid-template-columns: 1fr; }
  .facts dt { padding-bottom: 2px; border-bottom: 0; }
  .facts dd { padding-top: 0; }
}