:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #475569;
  --accent: #4f46e5;
  --card: #ffffff;
  --border: #e2e8f0;
  font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --text: #e2e8f0;
    --muted: #cbd5f5;
    --card: #111c44;
    --border: #1e293b;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
a {
  color: var(--accent);
}
.top-nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 18px clamp(16px, 4vw, 28px);
  position: relative;
}
.top-nav__inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 3vw, 28px);
}
.top-nav__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}
.top-nav__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.top-nav__brand img {
  width: 64px;
  height: 64px;
  border-radius: 12px;
}
.top-nav__title {
  font-weight: 700;
  font-size: clamp(1.4rem, 1.15rem + 0.8vw, 1.9rem);
  color: var(--text);
}
.top-nav__actions {
  display: flex;
  align-items: center;
}
.language-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
  margin: 0;
}
.language-toggle button {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.language-toggle button.active {
  background: var(--accent);
  color: #ffffff;
}
.breadcrumbs {
  margin: 12px 0 12px;
}
.breadcrumb-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: none;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.4;
}
.breadcrumb-list.lang-block.active {
  display: flex;
}
.breadcrumb-list li {
  display: inline-flex;
  align-items: baseline;
  line-height: inherit;
}
.breadcrumb-list li + li::before {
  content: "/";
  margin: 0 6px;
  color: var(--border);
}
.breadcrumb-list a {
  color: var(--accent);
  text-decoration: none;
}
.breadcrumb-list a:hover,
.breadcrumb-list a:focus-visible {
  text-decoration: underline;
}
@media (max-width: 720px) {
  .top-nav__inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .top-nav__actions {
    width: 100%;
    justify-content: center;
  }
  .language-toggle {
    width: 100%;
    justify-content: center;
  }
  .jump-nav.jump-nav--segments {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
  }
}

@media (max-width: 540px) {
  .language-toggle {
    gap: 6px;
    padding: 6px;
  }
  .language-toggle button {
    flex: 1 1 0;
    padding: 10px 0;
  }
  .jump-nav.jump-nav--segments {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
  }
  .jump-nav {
    flex-direction: column;
    align-items: stretch;
  }
  .jump-nav a {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .top-nav {
    padding: 16px;
  }
}
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 36px 20px 80px;
}
section {
  margin-bottom: 40px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px clamp(20px, 4vw, 40px);
  box-shadow: 0 18px 36px -28px rgba(15, 23, 42, 0.4);
}
section#jump-to-en,
section#jump-to-nl {
  padding-bottom: 24px;
}
section h2 {
  margin-top: 0;
  font-size: 1.8rem;
}
.jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}
.jump-nav.jump-nav--segments {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}
.jump-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(79, 70, 229, 0.08);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.jump-nav.jump-nav--segments a {
  padding: 12px 20px;
  min-height: 46px;
  border-radius: 18px;
  background: rgba(79, 70, 229, 0.12);
  border-color: rgba(79, 70, 229, 0.25);
  box-shadow: 0 12px 24px -20px rgba(15, 23, 42, 0.32);
  justify-content: center;
  white-space: nowrap;
}
.jump-nav a:hover,
.jump-nav a:focus-visible {
  background: rgba(79, 70, 229, 0.18);
  border-color: rgba(79, 70, 229, 0.4);
  color: var(--accent);
  outline: none;
}
.jump-section {
  position: relative;
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  border-radius: 0;
  margin-bottom: 28px;
}
.jump-heading {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
}
.jump-heading h2 {
  margin: 0;
}
.jump-footer .jump-heading {
  justify-content: flex-start;
}
.jump-footer .jump-heading h2 {
  font-size: 1.4rem;
}
.jump-footer .jump-nav {
  margin-top: 18px;
}
@media (max-width: 720px) {
  .jump-nav.jump-nav--segments {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
  }
  .jump-nav.jump-nav--segments a {
    width: 100%;
    justify-content: center;
  }
}
.revert-hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.grid {
  display: grid;
  gap: 18px;
}
@media (min-width: 680px) {
  .grid.two {
    grid-template-columns: 1fr 1fr;
  }
}
.card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  background: rgba(79, 70, 229, 0.05);
}
.card.secondary {
  background: rgba(79, 70, 229, 0.02);
  border-style: dashed;
}
.card h3 {
  margin-top: 0;
  font-size: 1.2rem;
}
.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  color: #ffffff;
  background: var(--accent);
  min-width: 200px;
  text-align: center;
}
.cta.secondary {
  color: var(--accent);
  background: rgba(79, 70, 229, 0.15);
  border: 1px solid rgba(79, 70, 229, 0.3);
}
ol {
  margin: 0;
  padding-left: 22px;
}
ol.spaced {
  margin-top: 12px;
}
li + li {
  margin-top: 6px;
}
.note {
  margin-top: 16px;
  padding: 14px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  background: rgba(79, 70, 229, 0.12);
  color: var(--muted);
}
.download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
}
details {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  background: rgba(148, 163, 184, 0.08);
}
details + details {
  margin-top: 16px;
}
summary {
  cursor: pointer;
  font-weight: 600;
}
code {
  background: rgba(79, 70, 229, 0.12);
  padding: 2px 5px;
  border-radius: 5px;
  font-size: 0.95rem;
}
pre {
  background: rgba(15, 23, 42, 0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  overflow: auto;
  font-size: 0.95rem;
  line-height: 1.5;
}
pre code {
  background: transparent;
  padding: 0;
}
footer {
  text-align: center;
  color: var(--muted);
  padding: 32px 12px 40px;
  font-size: 0.95rem;
}
.lang-block {
  display: none;
}
.lang-block.active {
  display: block;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(79, 70, 229, 0.4);
  border-radius: 50%;
  background: rgba(79, 70, 229, 0.15);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 12px 32px -24px rgba(15, 23, 42, 0.55);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 20;
}
.back-to-top:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.guide-list {
  list-style: disc;
  padding-left: 22px;
}
.guide-list li + li {
  margin-top: 8px;
}
.guide-link {
  color: var(--accent);
  text-decoration: none;
}
.guide-link:hover,
.guide-link:focus-visible {
  text-decoration: underline;
}
.guide-list strong {
  color: var(--text);
}