/* ===========================
   CSS Variables (Swiss Palette)
   =========================== */
:root {
  --color-primary: #1F4B99;
  --color-secondary: #0E7C86;
  --color-accent: #E24A2A;
  --color-bg: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #121418;
  --color-muted: #4B5563;
  --color-border: #D6D2C8;
  --radius: 2px;
  --space: 1.5rem;
  --maxw: 68rem;
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
}

/* ===========================
   Reset & Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  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 {
  font-family: var(--font-base);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Typography (Swiss Hierarchy)
   =========================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-text);
}

h1 {
  font-size: 2.25rem;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.75rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.375rem;
  margin-top: 2rem;
}

p, ul, ol, table, blockquote, details {
  margin-bottom: 1.5rem;
}

ul, ol {
  padding-left: 1.75rem;
}

li {
  margin-bottom: 0.5rem;
}

strong {
  font-weight: 700;
  color: var(--color-text);
}

/* ===========================
   Links
   =========================== */
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  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: var(--radius);
}

/* ===========================
   Skip Link
   =========================== */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--color-accent);
  color: var(--color-surface);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 700;
  border-radius: var(--radius);
  z-index: 9999;
}

.skip-link:focus {
  top: 1rem;
}

/* ===========================
   Layout: Container & Grid
   =========================== */
.container {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

/* ===========================
   Header & Navigation
   =========================== */
header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.2s ease;
}

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

nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-accent);
}

/* ===========================
   Breadcrumbs
   =========================== */
.breadcrumbs {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
  font-size: 0.9375rem;
}

.breadcrumbs ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.breadcrumbs li:not(:last-child)::after {
  content: '>';
  margin-left: 0.5rem;
  color: var(--color-muted);
}

.breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

/* ===========================
   Main & Article
   =========================== */
main {
  background-color: var(--color-surface);
  padding: 3rem 0;
  min-height: 60vh;
}

article {
  margin-bottom: 3rem;
}

/* ===========================
   Aside (Callout)
   =========================== */
aside {
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-accent);
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: var(--radius);
}

aside h2 {
  font-size: 1.25rem;
  margin-top: 0;
  border-bottom: none;
}

aside p {
  margin-bottom: 0.75rem;
}

aside p:last-child {
  margin-bottom: 0;
}

/* ===========================
   Blockquote
   =========================== */
blockquote {
  background-color: var(--color-bg);
  border-left: 4px solid var(--color-secondary);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--color-text);
  border-radius: var(--radius);
}

blockquote p {
  margin-bottom: 0;
}

blockquote strong {
  font-style: normal;
  color: var(--color-primary);
}

/* ===========================
   Tables (Semantic, Responsive)
   =========================== */
table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  margin: 2rem 0;
  font-size: 1rem;
  overflow-x: auto;
  display: block;
}

@media (min-width: 768px) {
  table {
    display: table;
  }
}

caption {
  font-weight: 700;
  text-align: left;
  padding: 0.75rem 1rem;
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  font-size: 1.125rem;
}

thead {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

@media (min-width: 1024px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

th, td {
  text-align: left;
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 700;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

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

tbody tr:hover {
  background-color: #E8E4DC;
}

/* ===========================
   Details / Summary (Accordion)
   =========================== */
details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  transition: background-color 0.2s ease;
}

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

details[open] {
  background-color: var(--color-bg);
}

summary {
  font-weight: 700;
  cursor: pointer;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s ease;
}

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

summary::before {
  content: '▸';
  display: inline-block;
  transition: transform 0.2s ease;
  color: var(--color-accent);
  font-size: 1.25rem;
}

details[open] summary::before {
  transform: rotate(90deg);
}

summary:hover {
  color: var(--color-secondary);
}

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

details p {
  margin-top: 1rem;
  margin-bottom: 0;
  color: var(--color-text);
}

/* ===========================
   Pre (for JSON-LD display)
   =========================== */
pre {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-muted);
  margin: 2rem 0;
  white-space: pre-wrap;
  word-wrap: break-word;
}

/* ===========================
   Footer
   =========================== */
footer {
  background-color: var(--color-text);
  color: var(--color-surface);
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

footer p {
  margin: 0;
  font-size: 0.9375rem;
}

/* ===========================
   Responsive Breakpoints
   =========================== */
@media (min-width: 768px) {
  body {
    font-size: 1.125rem;
  }
  h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 2rem;
  }
  main {
    padding: 4rem 0;
  }
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.5rem;
  }
  h2 {
    font-size: 2.25rem;
  }
  main {
    padding: 5rem 0;
  }
  article {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* ===========================
   Utility: Focus & Hover States
   =========================== */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===========================
   Print Styles
   =========================== */
@media print {
  header, footer, nav, aside, .breadcrumbs, pre {
    display: none;
  }
  body {
    background-color: white;
    color: black;
  }
  a {
    text-decoration: underline;
    color: black;
  }
}