:root {
  --color-primary: #1B4D8A;
  --color-secondary: #0F766E;
  --color-accent: #D97706;
  --color-bg: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #111827;
  --color-muted: #4B5563;
  --color-border: #D1D5DB;
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 10px;
  --space: clamp(14px, 1.6vw, 18px);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.1vw, 18px);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Swiss Typography: strict grid, generous whitespace, left-aligned rag */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space) 0;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  text-align: left;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: calc(var(--space) * 1.5);
}

h2 {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  margin-top: calc(var(--space) * 2);
  padding-top: var(--space);
  border-top: 2px solid var(--color-border);
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
}

p {
  margin: 0 0 var(--space) 0;
  text-align: left;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

a:hover {
  color: var(--color-secondary);
  text-decoration-color: var(--color-accent);
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Site Header */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 3px solid var(--color-primary);
  padding: var(--space) calc(var(--space) * 1.5);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
}

.site-name {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.site-name:hover {
  color: var(--color-secondary);
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.5);
}

.main-nav a {
  font-weight: 500;
  text-decoration: none;
  padding: 0.25em 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  border-bottom-color: var(--color-accent);
  color: var(--color-secondary);
}

/* Breadcrumbs */
.breadcrumbs {
  padding: var(--space) 0;
  margin-bottom: var(--space);
}

.breadcrumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  font-size: 0.9em;
  color: var(--color-muted);
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5em;
  color: var(--color-border);
}

.breadcrumbs a {
  color: var(--color-muted);
}

.breadcrumbs a:hover {
  color: var(--color-primary);
}

/* Main Content Layout */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: calc(var(--space) * 2) calc(var(--space) * 1.5);
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--space) * 2);
}

@media (min-width: 1024px) {
  .main-content {
    grid-template-columns: 2fr 1fr;
  }
  
  .content-article {
    grid-column: 1;
  }
  
  .content-aside {
    grid-column: 2;
    grid-row: 1 / span 2;
  }
  
  .breadcrumbs {
    grid-column: 1 / -1;
  }
}

/* Article and Sections */
.content-article {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 2);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.article-header {
  margin-bottom: calc(var(--space) * 1.5);
  padding-bottom: var(--space);
  border-bottom: 3px solid var(--color-primary);
}

.content-section {
  margin-bottom: calc(var(--space) * 2);
}

/* Aside */
.content-aside {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  align-self: start;
}

.content-aside h2 {
  font-size: 1.2rem;
  margin-top: 0;
  border-top: none;
  padding-top: 0;
}

/* Blockquote */
blockquote {
  margin: calc(var(--space) * 1.5) 0;
  padding: var(--space) calc(var(--space) * 1.5);
  border-left: 4px solid var(--color-secondary);
  background-color: var(--color-bg);
  border-radius: 0 var(--radius) var(--radius) 0;
}

blockquote p {
  margin-bottom: 0.5em;
  font-style: italic;
  color: var(--color-text);
}

blockquote cite {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85em;
  font-style: normal;
  color: var(--color-muted);
  margin-top: 0.5em;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space) 0 calc(var(--space) * 1.5) 0;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95em;
}

caption {
  padding: var(--space);
  font-weight: 700;
  text-align: left;
  background-color: var(--color-primary);
  color: var(--color-surface);
}

th, td {
  padding: calc(var(--space) * 0.75) var(--space);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background-color: var(--color-bg);
  font-weight: 600;
  color: var(--color-primary);
  position: sticky;
  top: 0;
}

@media (min-width: 768px) {
  th {
    position: sticky;
    top: 0;
  }
}

tbody tr {
  transition: background-color 0.15s ease;
}

tbody tr:nth-child(even) {
  background-color: var(--color-surface);
}

tbody tr:nth-child(odd) {
  background-color: var(--color-bg);
}

tbody tr:hover {
  background-color: #E8E6E1;
}

/* Details/Summary Accordion */
details {
  margin: var(--space) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
}

details[open] {
  border-color: var(--color-accent);
}

summary {
  padding: var(--space);
  font-weight: 600;
  cursor: pointer;
  background-color: var(--color-bg);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5em;
}

summary::-webkit-details-marker {
  display: none;
}

summary::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5em;
  height: 1.5em;
  font-weight: 700;
  color: var(--color-surface);
  background-color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

details[open] summary::before {
  content: "−";
  background-color: var(--color-accent);
}

summary:hover {
  background-color: #E8E6E1;
}

summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: -3px;
}

details > div,
details > p {
  padding: var(--space);
  border-top: 1px solid var(--color-border);
}

.faq-answer {
  padding: var(--space);
  border-top: 1px solid var(--color-border);
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* FAQ Section */
.faq-section {
  margin-top: calc(var(--space) * 1.5);
}

.faq-section details {
  margin-bottom: calc(var(--space) * 0.75);
}

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: calc(var(--space) * 2) calc(var(--space) * 1.5);
  margin-top: calc(var(--space) * 3);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
}

.site-footer p {
  margin: 0;
  font-size: 0.9em;
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.5);
}

.footer-nav a {
  color: var(--color-surface);
  text-decoration: none;
  font-size: 0.9em;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--color-accent);
}

.footer-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Responsive adjustments */
@media (max-width: 767px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .main-nav ul {
    gap: var(--space);
  }
  
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
  
  .content-article {
    padding: var(--space);
  }
  
  th, td {
    padding: calc(var(--space) * 0.5);
    font-size: 0.85em;
  }
}

@media (min-width: 768px) {
  .main-content {
    padding: calc(var(--space) * 3) calc(var(--space) * 2);
  }
}

/* Strong and emphasis */
strong {
  font-weight: 600;
  color: var(--color-text);
}

em {
  font-style: italic;
}

/* Lists within content */
.content-article ul,
.content-article ol {
  margin: 0 0 var(--space) calc(var(--space) * 1.5);
  padding: 0;
}

.content-article li {
  margin-bottom: calc(var(--space) * 0.5);
}

/* Table section heading */
.table-section {
  margin-top: calc(var(--space) * 2);
}