:root {
  --color-bg: #F7F4EE;
  --color-surface: #FFFFFF;
  --color-text: #111827;
  --color-muted: #4B5563;
  --color-border: #D1D5DB;
  --color-primary: #1B3A57;
  --color-secondary: #2E6F6B;
  --color-accent: #D97706;
  --radius: 10px;
  --space: 1rem;
  --maxw: 72rem;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --line-height: 1.6;
  --transition-speed: 0.2s;
}

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

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

/* Typography - Swiss style baseline rhythm */
h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: calc(var(--space) * 0.75);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 {
  font-size: 2rem;
  margin-bottom: var(--space);
  border-bottom: 3px solid var(--color-accent);
  padding-bottom: calc(var(--space) * 0.5);
}

h2 {
  font-size: 1.5rem;
  margin-top: calc(var(--space) * 2);
  color: var(--color-secondary);
}

h3 {
  font-size: 1.25rem;
  color: var(--color-primary);
}

p {
  margin-top: 0;
  margin-bottom: var(--space);
}

a {
  color: var(--color-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-speed) ease;
}

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

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

/* Header */
.site-header {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--space) 0;
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

.site-brand {
  display: flex;
  align-items: center;
}

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-surface);
  letter-spacing: -0.02em;
}

.main-nav {
  width: 100%;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 0.5) var(--space);
}

.nav-list a {
  color: var(--color-surface);
  text-decoration: none;
  padding: calc(var(--space) * 0.25) calc(var(--space) * 0.5);
  border-radius: var(--radius);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.nav-list a:hover {
  background-color: var(--color-secondary);
  color: var(--color-surface);
}

.nav-list a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.nav-list a[aria-current="page"] {
  background-color: var(--color-accent);
  color: var(--color-surface);
}

.mission-statement {
  margin: var(--space) 0 0 0;
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 60ch;
}

/* Main content */
.main-content {
  padding: calc(var(--space) * 2) 0;
}

article {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.content-section {
  margin-bottom: calc(var(--space) * 2);
  padding-bottom: calc(var(--space) * 1.5);
  border-bottom: 1px solid var(--color-border);
}

.content-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

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

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

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

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

.breadcrumbs span[aria-current="page"] {
  color: var(--color-text);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--space) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background-color: var(--color-surface);
}

caption {
  text-align: left;
  font-weight: 600;
  color: var(--color-primary);
  padding: calc(var(--space) * 0.75) 0;
  font-size: 1rem;
  border-bottom: 2px solid var(--color-primary);
}

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

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

tbody tr:nth-child(even) {
  background-color: rgba(247, 244, 238, 0.5);
}

tbody tr {
  transition: background-color var(--transition-speed) ease;
}

tbody tr:hover {
  background-color: rgba(46, 111, 107, 0.08);
}

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

blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--color-text);
}

/* Aside boxes */
.tips-aside,
.glossary-aside {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: var(--space);
  margin: var(--space) 0;
}

.tips-aside h3,
.glossary-aside h3 {
  margin-top: 0;
  font-size: 1.1rem;
  color: var(--color-secondary);
}

.tips-aside ul {
  margin: 0;
  padding-left: calc(var(--space) * 1.25);
}

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

.tips-aside li:last-child {
  margin-bottom: 0;
}

/* Definition lists (glossary) */
dl {
  margin: 0;
}

dt {
  font-weight: 600;
  color: var(--color-primary);
  margin-top: calc(var(--space) * 0.75);
}

dt:first-child {
  margin-top: 0;
}

dd {
  margin-left: 0;
  padding-left: var(--space);
  color: var(--color-muted);
  border-left: 2px solid var(--color-border);
}

/* FAQ Accordions */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 0.75);
}

.faq-item {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item[open] {
  border-color: var(--color-secondary);
}

.faq-item summary {
  padding: var(--space);
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-secondary);
  flex-shrink: 0;
  transition: transform var(--transition-speed) ease;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background-color: var(--color-surface);
  color: var(--color-secondary);
}

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

.faq-answer {
  padding: 0 var(--space) var(--space) var(--space);
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

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

/* Footer */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: calc(var(--space) * 1.5) 0;
  margin-top: calc(var(--space) * 2);
}

.footer-nav {
  margin-bottom: var(--space);
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space);
}

.footer-links a {
  color: var(--color-surface);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

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

.footer-links a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.copyright {
  margin: 0;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
}

/* Responsive - Tablet (768px) */
@media (min-width: 768px) {
  :root {
    --space: 1.25rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .header-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .main-nav {
    width: auto;
  }

  .nav-list {
    gap: calc(var(--space) * 0.5);
  }

  article {
    padding: calc(var(--space) * 2);
  }

  .tips-aside,
  .glossary-aside {
    padding: calc(var(--space) * 1.25);
  }

  th, td {
    padding: var(--space);
  }
}

/* Responsive - Desktop (1024px) */
@media (min-width: 1024px) {
  :root {
    --space: 1.5rem;
  }

  h1 {
    font-size: 2.75rem;
  }

  .container {
    padding-left: calc(var(--space) * 1.5);
    padding-right: calc(var(--space) * 1.5);
  }

  .main-content {
    padding: calc(var(--space) * 3) 0;
  }

  article {
    padding: calc(var(--space) * 2.5);
  }

  .site-name {
    font-size: 1.75rem;
  }

  .nav-list a {
    padding: calc(var(--space) * 0.35) calc(var(--space) * 0.75);
  }

  .faq-item summary {
    padding: calc(var(--space) * 1.1);
  }

  .faq-answer {
    padding: var(--space) calc(var(--space) * 1.5) calc(var(--space) * 1.25);
  }
}