:root {
  --color-bg: #F7F4EF;
  --color-surface: #FFFFFF;
  --color-text: #14121A;
  --color-muted: #4B4656;
  --color-border: #1F1B2A;
  --color-primary: #2F2A7A;
  --color-secondary: #0E6B5C;
  --color-accent: #FF4D2E;
  --radius: 10px;
  --shadow-hard: 6px 6px 0 #1F1B2A;
  --maxw: 72rem;
  --space: 1rem;
}

*,
*::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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-surface);
  padding: 0.75rem 1.5rem;
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  border: 3px solid var(--color-border);
}

.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
}

/* Header */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 4px solid var(--color-border);
  padding: var(--space) 0;
}

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

.site-name {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
}

.nav-list a {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  transition: background-color 0.15s ease, box-shadow 0.15s ease;
}

.nav-list a:hover {
  background-color: var(--color-accent);
  color: var(--color-surface);
  box-shadow: var(--shadow-hard);
}

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

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

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

/* Breadcrumb */
.breadcrumb {
  padding: var(--space) 0;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.9rem;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.breadcrumb a:hover {
  color: var(--color-accent);
  text-decoration-thickness: 3px;
}

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

/* Main */
main {
  flex: 1;
  padding: calc(var(--space) * 2) 0;
}

article {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
}

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

.page-header h1 {
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.content-section {
  margin-bottom: calc(var(--space) * 3);
}

.content-section h2 {
  font-size: clamp(1.35rem, 4vw, 2rem);
  font-weight: 700;
  margin-bottom: var(--space);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.content-section h3 {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-secondary);
}

.content-section p {
  margin-bottom: var(--space);
  color: var(--color-text);
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
  transition: color 0.15s ease, text-decoration-thickness 0.15s ease, background-color 0.15s ease;
}

a:hover {
  color: var(--color-accent);
  text-decoration-thickness: 3px;
  background-color: rgba(255, 77, 46, 0.1);
}

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

/* Blockquote */
blockquote {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  border-left: 6px solid var(--color-primary);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 1.5) 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

blockquote p {
  font-size: 1.1rem;
  font-style: italic;
  margin-bottom: 0.75rem;
}

blockquote cite {
  display: block;
  font-size: 0.9rem;
  color: var(--color-muted);
  font-style: normal;
}

/* Definition Box / Aside */
.definition-box {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 1.5) 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

.definition-box h3 {
  margin-bottom: var(--space);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.definition-box dl {
  display: grid;
  gap: 0.75rem;
}

.definition-box dt {
  font-weight: 700;
  color: var(--color-primary);
}

.definition-box dd {
  margin-left: 0;
  padding-left: var(--space);
  border-left: 3px solid var(--color-secondary);
  color: var(--color-text);
}

/* Brief Cards Grid */
.brief-grid {
  display: grid;
  gap: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 1.5) 0;
}

@media (min-width: 768px) {
  .brief-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .brief-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.brief-card {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  padding: calc(var(--space) * 1.25);
  box-shadow: var(--shadow-hard);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.brief-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--color-border);
}

.brief-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.brief-card ul {
  list-style: none;
  margin-bottom: var(--space);
}

.brief-card li {
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--color-muted);
}

.brief-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.brief-card p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 1.5) 0;
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
}

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);
}

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

th {
  padding: 0.85rem var(--space);
  text-align: left;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 3px solid var(--color-border);
}

td {
  padding: 0.85rem var(--space);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

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

tbody tr:hover {
  background-color: rgba(47, 42, 122, 0.05);
}

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

/* Details/Summary Accordion */
details {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: var(--space);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

summary {
  padding: var(--space) calc(var(--space) * 1.25);
  font-weight: 700;
  font-size: 1.05rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color 0.15s ease;
}

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

summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: transform 0.15s ease;
}

details[open] summary::after {
  content: "−";
}

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

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

details[open] {
  border-left: 6px solid var(--color-accent);
}

.details-content {
  padding: var(--space) calc(var(--space) * 1.25);
  padding-top: 0;
  border-top: 2px solid var(--color-border);
}

.details-content p {
  margin-top: var(--space);
}

.details-content p:last-child {
  margin-bottom: 0;
}

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

li {
  margin-bottom: 0.5rem;
}

.checklist {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  padding: calc(var(--space) * 1.25);
  padding-left: calc(var(--space) * 2.5);
  box-shadow: var(--shadow-hard);
}

.checklist li {
  padding: 0.5rem 0;
}

.checklist li::marker {
  color: var(--color-accent);
  font-weight: 700;
}

/* Footer */
.site-footer {
  background-color: var(--color-surface);
  border-top: 4px solid var(--color-border);
  padding: calc(var(--space) * 2) 0;
  margin-top: auto;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space);
  list-style: none;
  margin-bottom: var(--space);
}

.footer-nav a {
  color: var(--color-text);
  font-weight: 600;
}

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

.copyright {
  font-size: 0.9rem;
  color: var(--color-muted);
}

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

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

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