/* CSS Variables from Color Palette */
:root {
  --color-bg: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-text: #0B1220;
  --color-text-muted: #475569;
  --color-border: #CBD5E1;
  --color-primary: #1E3A8A;
  --color-secondary: #0F766E;
  --color-accent: #C2410C;
  --radius: 4px;
  --shadow: 0 1px 3px rgba(11, 18, 32, 0.1), 0 1px 2px rgba(11, 18, 32, 0.06);
  --space: 1rem;
  --max-width: 72rem;
}

/* Reset and Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Swiss Typography - Strong Grid Rhythm */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

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

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

.site-name {
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.site-name:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

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

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

.main-nav a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

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

.main-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
}

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

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

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

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

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

/* Main Content */
main {
  padding: calc(var(--space) * 2) 0 calc(var(--space) * 4);
}

article {
  display: grid;
  gap: calc(var(--space) * 3);
}

.page-header {
  margin-bottom: var(--space);
}

.page-intro {
  font-size: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  color: var(--color-text-muted);
  max-width: 65ch;
}

/* Headings - Swiss Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  margin-bottom: calc(var(--space) * 1.5);
}

h2 {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  margin-top: calc(var(--space) * 2);
  padding-bottom: calc(var(--space) * 0.5);
  border-bottom: 2px solid var(--color-border);
}

h3 {
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
}

/* Paragraphs and Text */
p {
  margin: 0 0 var(--space);
  max-width: 70ch;
}

section {
  scroll-margin-top: 5rem;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

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

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

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

/* Glossary / Definition Lists */
.glossary-list {
  margin: var(--space) 0 calc(var(--space) * 2);
  padding: 0;
}

.glossary-list dt {
  font-weight: 700;
  color: var(--color-primary);
  margin-top: calc(var(--space) * 1.5);
  margin-bottom: calc(var(--space) * 0.25);
}

.glossary-list dt:first-child {
  margin-top: 0;
}

.glossary-list dd {
  margin-left: 0;
  padding-left: var(--space);
  border-left: 3px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Tables */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: var(--space) 0 calc(var(--space) * 2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

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

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

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

tbody tr:last-child td {
  border-bottom: none;
}

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

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

/* Blockquote */
blockquote {
  margin: calc(var(--space) * 2) 0;
  padding: calc(var(--space) * 1.5);
  padding-left: calc(var(--space) * 2);
  border-left: 4px solid var(--color-accent);
  background-color: rgba(248, 250, 252, 0.8);
  border-radius: 0 var(--radius) var(--radius) 0;
}

blockquote p {
  margin: 0;
  font-style: italic;
  font-size: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  color: var(--color-text);
}

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

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

li::marker {
  color: var(--color-secondary);
}

/* Aside - Trusted References */
.trusted-references {
  margin-top: calc(var(--space) * 2);
  padding: calc(var(--space) * 1.5);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.trusted-references h3 {
  margin-top: 0;
  color: var(--color-secondary);
  font-size: 1.125rem;
}

.trusted-references ul {
  margin-bottom: 0;
}

/* FAQ Accordion Styles */
.faq-section {
  display: grid;
  gap: var(--space);
}

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

.faq-item summary {
  display: flex;
  align-items: center;
  gap: var(--space);
  padding: calc(var(--space) * 1.25);
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s ease;
}

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

.faq-item summary::before {
  content: '+';
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

.faq-item[open] summary::before {
  content: '−';
}

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

.faq-item summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.faq-item summary h2 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  font-weight: 600;
}

.faq-answer {
  padding: 0 calc(var(--space) * 1.25) calc(var(--space) * 1.25);
  padding-left: calc(var(--space) * 1.25 + 1.5rem + var(--space));
  border-top: 1px solid var(--color-border);
}

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

.faq-cost-table {
  margin-top: calc(var(--space) * 2);
}

.faq-cost-table h2 {
  border-bottom: none;
  padding-bottom: 0;
}

/* Footer */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: calc(var(--space) * 2) 0;
  margin-top: auto;
}

.site-footer p {
  margin: 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* Responsive Breakpoints */
@media (min-width: 768px) {
  :root {
    --space: 1.25rem;
  }
  
  .container {
    padding-left: calc(var(--space) * 2);
    padding-right: calc(var(--space) * 2);
  }
  
  article {
    gap: calc(var(--space) * 4);
  }
  
  .glossary-list dd {
    padding-left: calc(var(--space) * 1.5);
  }
}

@media (min-width: 1024px) {
  :root {
    --space: 1.5rem;
  }
  
  /* Sticky table header */
  .table-wrapper {
    max-height: 70vh;
    overflow-y: auto;
  }
  
  thead th {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: var(--color-bg);
    box-shadow: inset 0 -1px 0 var(--color-border);
  }
  
  .trusted-references {
    max-width: 24rem;
    float: right;
    margin-left: calc(var(--space) * 2);
    margin-bottom: var(--space);
  }
}

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

/* Print Styles */
@media print {
  .site-header,
  .breadcrumbs,
  .site-footer {
    display: none;
  }
  
  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }
  
  a {
    color: #000;
    text-decoration: underline;
  }
  
  .table-wrapper {
    overflow: visible;
  }
  
  .faq-item[open] .faq-answer {
    display: block;
  }
}