:root {
  --color-primary: #1E3A8A;
  --color-secondary: #0F766E;
  --color-accent: #D97706;
  --color-bg: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-text: #0B1220;
  --color-muted: #475569;
  --color-border: #CBD5E1;
  --radius: 10px;
  --space: clamp(12px, 1.6vw, 18px);
  --maxw: 72rem;
  --shadow: 0 10px 30px rgba(11,18,32,0.08);
}

*,
*::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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: clamp(1rem, 1vw + 0.75rem, 1.125rem);
  line-height: 1.7;
  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 */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  margin-top: 2em;
  margin-bottom: 0.5em;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3rem);
  margin-top: 0;
  border-bottom: 4px solid var(--color-primary);
  padding-bottom: 0.5em;
}

h2 {
  font-size: clamp(1.5rem, 2vw + 0.75rem, 2rem);
  color: var(--color-primary);
}

h3 {
  font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.5rem);
  color: var(--color-secondary);
}

p {
  margin-top: 0;
  margin-bottom: 1.5em;
  max-width: 70ch;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  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: 3px;
  border-radius: 2px;
}

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

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

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.03em;
}

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

.site-header nav a {
  text-decoration: none;
  font-weight: 600;
  padding: 0.5em 0;
  position: relative;
}

.site-header nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--color-accent);
  transition: width 0.2s ease;
}

.site-header nav a:hover::after,
.site-header nav a[aria-current="page"]::after {
  width: 100%;
}

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

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

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

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

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

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

article,
section {
  margin-bottom: calc(var(--space) * 3);
}

article header {
  margin-bottom: calc(var(--space) * 2);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 2) 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

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

caption {
  padding: var(--space);
  font-weight: 700;
  font-size: 1.1rem;
  text-align: left;
  background-color: var(--color-primary);
  color: var(--color-surface);
  border-radius: var(--radius) var(--radius) 0 0;
}

thead {
  background-color: var(--color-bg);
}

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

th {
  font-weight: 700;
  color: var(--color-primary);
  position: sticky;
  top: 0;
  background-color: var(--color-bg);
}

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

tbody tr:hover {
  background-color: rgba(30, 58, 138, 0.05);
  transition: background-color 0.2s ease;
}

/* Details/Summary Accordions */
details {
  margin-bottom: var(--space);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
}

summary {
  padding: var(--space);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space);
  transition: background-color 0.2s ease;
}

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;
  font-size: 1.2rem;
  color: var(--color-surface);
  background-color: var(--color-primary);
  border-radius: 50%;
  flex-shrink: 0;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

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

summary:hover {
  background-color: var(--color-bg);
}

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

.details-content {
  padding: 0 var(--space) var(--space) var(--space);
  border-top: 1px solid var(--color-border);
}

/* Blockquotes */
blockquote {
  margin: calc(var(--space) * 2) 0;
  padding: var(--space) calc(var(--space) * 1.5);
  border-left: 5px solid var(--color-accent);
  background-color: var(--color-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: var(--shadow);
}

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

/* Aside */
aside {
  background-color: var(--color-surface);
  border: 2px solid var(--color-secondary);
  border-radius: var(--radius);
  padding: var(--space);
  margin: calc(var(--space) * 2) 0;
}

aside h2 {
  font-size: 1.25rem;
  margin-top: 0;
  color: var(--color-secondary);
}

aside ul {
  margin: 0;
  padding-left: 1.5em;
}

aside li {
  margin-bottom: 0.5em;
}

.schema-aside {
  border-color: var(--color-muted);
  background-color: var(--color-bg);
}

.schema-aside h2 {
  color: var(--color-muted);
}

pre {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: var(--space);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.5;
}

code {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
  background-color: var(--color-bg);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* FAQ Section */
.faq-section {
  margin-top: calc(var(--space) * 2);
}

/* Footer */
.site-footer {
  background-color: var(--color-text);
  color: var(--color-bg);
  padding: calc(var(--space) * 2) 0;
  margin-top: calc(var(--space) * 3);
}

.site-footer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.site-footer p + p {
  margin-top: 0.5em;
}

/* Lists */
ul, ol {
  margin-top: 0;
  margin-bottom: 1.5em;
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.5em;
}

/* Responsive - Tablet */
@media (min-width: 768px) {
  .site-header .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

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

  th {
    position: sticky;
    top: 0;
  }
}

/* Responsive - Desktop */
@media (min-width: 1024px) {
  body {
    display: grid;
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
  }

  .site-header nav ul {
    gap: calc(var(--space) * 2);
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2rem;
  }

  table {
    font-size: 1rem;
  }

  th,
  td {
    padding: calc(var(--space) * 1.25);
  }
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer {
    position: static;
  }

  details {
    border: 1px solid #000;
  }

  details[open] summary::before {
    content: '−';
  }

  a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: #666;
  }

  a[href^="/"]::after {
    content: none;
  }
}