/* pdftoegankelijk.nl — whitepaper stylesheet */

:root {
  --paper: #fbfaf7;
  --surface: #f2efe8;
  --ink: #1b1d22;
  --ink-soft: #4a4f59;
  --rule: #d9d4c7;
  --accent: #1f4e8c;
  --accent-ink: #ffffff;
  --mark: #b3401a;
  --focus: #b3401a;

  --serif: Charter, "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --measure: 70ch;
  --gutter: clamp(1rem, 4vw, 2.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16181c;
    --surface: #1f2228;
    --ink: #e9e6df;
    --ink-soft: #b3b0a8;
    --rule: #3a3d44;
    --accent: #8fb5ec;
    --accent-ink: #10131a;
    --mark: #f0a07e;
    --focus: #f0a07e;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 1.5rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.125rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Skip link */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 10;
  padding: .75rem 1rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--sans);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}
main:focus { outline: none; }

/* Masthead */
.masthead {
  border-bottom: 1px solid var(--rule);
  padding: clamp(3rem, 10vw, 6rem) 0 clamp(2rem, 6vw, 3.5rem);
}
.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--sans);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mark);
}
h1 {
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
}
.lede {
  max-width: 38ch;
  margin: 1.25rem 0 0;
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  line-height: 1.4;
  color: var(--ink-soft);
}
.meta {
  margin: 1.5rem 0 0;
  font-family: var(--sans);
  font-size: .875rem;
  color: var(--ink-soft);
}

/* Layout */
.layout {
  display: grid;
  gap: 2rem 4rem;
  grid-template-columns: minmax(0, 1fr);
  padding-top: 2.5rem;
  padding-bottom: 4rem;
}
@media (min-width: 64rem) {
  .layout { grid-template-columns: 15rem minmax(0, 1fr); }
  .toc {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    max-height: calc(100vh - 3rem);
    overflow-y: auto;
  }
}

/* Table of contents */
.toc {
  font-family: var(--sans);
  font-size: .9375rem;
}
.toc h2 {
  margin: 0 0 .75rem;
  font-size: .8125rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
  border-left: 2px solid var(--rule);
}
.toc li { counter-increment: toc; }
.toc a {
  display: block;
  padding: .35rem 0 .35rem 1rem;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--ink);
  text-decoration: none;
}
.toc a::before {
  content: counter(toc) ".";
  display: inline-block;
  min-width: 1.5em;
  color: var(--ink-soft);
}
.toc a:hover {
  border-left-color: var(--accent);
  color: var(--accent);
}

/* Content */
main { max-width: var(--measure); min-width: 0; }

section { padding-top: 1rem; }
section + section {
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
  padding-top: 3rem;
}

h2 {
  margin: 0 0 1.25rem;
  font-size: clamp(1.625rem, 3.5vw, 2.125rem);
  line-height: 1.2;
  letter-spacing: -.01em;
}
h2 .num {
  display: inline-block;
  min-width: 1.6em;
  font-family: var(--sans);
  font-weight: 600;
  color: var(--mark);
}
h3 {
  margin: 2.25rem 0 .75rem;
  font-family: var(--sans);
  font-size: 1.1875rem;
  line-height: 1.3;
}

p, ul, ol, dl { margin: 0 0 1.25rem; }
ul, ol { padding-left: 1.5rem; }
li + li { margin-top: .4rem; }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: .18em;
}
a:hover { text-decoration-thickness: 2px; }

code {
  font-family: var(--mono);
  font-size: .875em;
  padding: .1em .35em;
  background: var(--surface);
  border-radius: 3px;
}
abbr[title] { text-decoration: underline dotted; text-underline-offset: .2em; }

.note {
  font-size: 1rem;
  color: var(--ink-soft);
  font-style: italic;
}

/* Callout */
.callout {
  margin: 2rem 0 0;
  padding: 1.5rem 1.75rem;
  background: var(--surface);
  border-left: 4px solid var(--mark);
}
.callout h3 { margin-top: 0; }
.callout ul { margin-bottom: 0; }

/* Definition list */
.features { display: grid; gap: 1.25rem; }
.features div {
  padding-left: 1rem;
  border-left: 2px solid var(--rule);
}
.features dt {
  font-family: var(--sans);
  font-weight: 600;
}
.features dd { margin: .25rem 0 0; }

/* Cards */
.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
}
.card {
  padding: 1.25rem 1.5rem;
  background: var(--surface);
  border-top: 3px solid var(--accent);
}
.card h3 { margin-top: 0; }
.card p { margin: 0; font-size: 1rem; }

/* Table */
.table-wrap {
  overflow-x: auto;
  margin: 0 0 1.25rem;
  border: 1px solid var(--rule);
}
table {
  width: 100%;
  min-width: 40rem;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: .9375rem;
  line-height: 1.45;
}
caption {
  padding: .75rem 1rem;
  text-align: left;
  font-weight: 600;
  background: var(--surface);
}
th, td {
  padding: .65rem 1rem;
  text-align: left;
  vertical-align: top;
  border-top: 1px solid var(--rule);
}
thead th {
  border-bottom: 2px solid var(--ink);
  font-size: .8125rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
tbody th { font-weight: 600; }

/* Checklist and steps */
.checklist { list-style: none; padding-left: 0; }
.checklist li {
  position: relative;
  padding-left: 2rem;
}
.checklist li::before {
  content: "";
  position: absolute;
  left: .2rem;
  top: .35em;
  width: 1em;
  height: 1em;
  border: 2px solid var(--accent);
  border-radius: 2px;
}

.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  column-gap: 1rem;
  align-items: start;
}
.steps li + li { margin-top: 1rem; }
.steps li::before {
  content: counter(step);
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--sans);
  font-weight: 700;
  font-size: .9375rem;
}
.steps li > span { display: block; }

/* CTA */
.cta {
  padding: 2rem 1.75rem;
  background: var(--surface);
  border-top: 0;
}
section + section.cta { border-top: 0; }
.cta p:last-child { margin-bottom: 0; }
.button {
  display: inline-block;
  padding: .85rem 1.4rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--sans);
  font-weight: 600;
  text-decoration: none;
  border-radius: 3px;
  overflow-wrap: anywhere;
}
.button:hover { text-decoration: underline; }

.sources li { overflow-wrap: anywhere; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: 2rem 0 3rem;
  font-family: var(--sans);
  font-size: .9375rem;
  color: var(--ink-soft);
}
.site-footer p { margin: 0 0 .5rem; }

/* Print: render as a clean whitepaper */
@media print {
  :root {
    --paper: #fff;
    --surface: #fff;
    --ink: #000;
    --ink-soft: #333;
    --accent: #000;
    --mark: #000;
  }
  body { font-size: 11pt; }
  .skip-link, .toc, .button { display: none; }
  .layout { display: block; padding: 0; }
  main { max-width: none; }
  section + section { break-before: auto; }
  h2, h3 { break-after: avoid; }
  table, .callout, .card { break-inside: avoid; }
  .callout, .card, .cta { border: 1px solid #999; }
  .sources a::after { content: " (" attr(href) ")"; font-size: 9pt; }
  .table-wrap { overflow: visible; border: 0; }
  table { min-width: 0; }
}