/* CSS Variables - Oviduct Slate Spectrum */
:root {
  --color-primary: #2E3A59;
  --color-secondary: #3F6B7A;
  --color-accent: #C86B4A;
  --color-bg: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #1B1F2A;
  --color-muted: #5B6473;
  --color-border: #D7D2C9;
  --radius: 10px;
  --space: 1rem;
  --measure: 68ch;
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --font-mono: 'Courier New', Courier, monospace;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

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

h1 {
  font-size: clamp(1.75rem, 1.5rem + 1.25vw, 2.5rem);
  margin-bottom: var(--space);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  margin-top: calc(var(--space) * 2);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: calc(var(--space) * 0.5);
}

h3 {
  font-size: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  margin-top: calc(var(--space) * 1.5);
  color: var(--color-secondary);
}

p, li {
  max-width: var(--measure);
  margin-bottom: var(--space);
}

ul, ol {
  padding-left: calc(var(--space) * 1.5);
  margin-bottom: var(--space);
}

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

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

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

/* Container and layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

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

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space);
}

.site-name {
  font-size: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

nav {
  display: flex;
  gap: calc(var(--space) * 1.5);
  flex-wrap: wrap;
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

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

/* Breadcrumbs */
.breadcrumbs {
  padding-top: var(--space);
  padding-bottom: var(--space);
  font-size: 0.9rem;
  color: var(--color-muted);
}

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

.breadcrumbs a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

/* Main content */
main {
  padding-top: calc(var(--space) * 2);
  padding-bottom: calc(var(--space) * 3);
}

article {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 2);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

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

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

aside h3 {
  margin-top: 0;
  font-size: 1.1rem;
  color: var(--color-accent);
}

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

blockquote p {
  margin-bottom: 0;
}

/* Tables - Swiss typography with sticky header */
table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--space) * 1.5) 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

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

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

th {
  text-align: left;
  padding: calc(var(--space) * 0.75);
  font-weight: 600;
}

td {
  padding: calc(var(--space) * 0.75);
  border-top: 1px solid var(--color-border);
}

tbody tr {
  transition: background-color 0.2s ease;
}

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

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

/* Details/Summary accordions - Swiss style */
details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  margin-bottom: var(--space);
  padding: var(--space);
  transition: border-color 0.2s ease;
}

details:hover {
  border-left-color: var(--color-secondary);
}

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

summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--color-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s ease;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: rotate(0deg);
}

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

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

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

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

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

/* Footer */
footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: calc(var(--space) * 1.5) 0;
  text-align: center;
  margin-top: auto;
}

footer p {
  margin: 0;
  max-width: none;
}

/* Responsive breakpoints */
@media (min-width: 768px) {
  article {
    padding: calc(var(--space) * 3);
  }
  
  nav {
    gap: calc(var(--space) * 2);
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 1.125rem;
  }
  
  .container {
    padding-left: calc(var(--space) * 2);
    padding-right: calc(var(--space) * 2);
  }
  
  main {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--space) * 2);
  }
}

/* Utility classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Print styles */
@media print {
  body {
    background-color: white;
    color: black;
  }
  
  header, footer, nav, .breadcrumbs {
    display: none;
  }
  
  a {
    text-decoration: none;
    color: black;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
}