/* ========================================
   CSS Variables — Chinook Prairie Ink
   ======================================== */
:root {
  --color-primary: #1F3A5F;
  --color-secondary: #8C2F39;
  --color-accent: #C9A227;
  --color-bg: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #14161A;
  --color-muted: #4B5563;
  --color-border: #D7D0C6;
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  --font-serif: ui-serif, Georgia, "Times New Roman", Times, serif;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 22, 26, 0.10);
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
}

/* ========================================
   Base & Reset
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

/* ========================================
   Typography — Editorial Pairing
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.25rem;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 1.875rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-secondary);
  text-decoration: underline;
  transition: color 0.2s ease;
}

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

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

strong {
  font-weight: 600;
}

/* ========================================
   Layout — CSS Grid Page Shell
   ======================================== */
body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-sm);
  padding-right: var(--spacing-sm);
}

@media (min-width: 768px) {
  .container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
}

/* ========================================
   Header — Flexbox Cluster
   ======================================== */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: var(--spacing-sm) 0;
  box-shadow: var(--shadow);
}

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

.site-branding .site-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-primary);
  text-decoration: none;
}

.main-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  list-style: none;
}

.main-nav a {
  font-weight: 500;
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.main-nav a:hover {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

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

/* ========================================
   Main Content
   ======================================== */
main {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-2xl);
}

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

.content-section {
  margin-bottom: var(--spacing-xl);
}

/* ========================================
   Breadcrumbs
   ======================================== */
.breadcrumb {
  margin-bottom: var(--spacing-md);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  list-style: none;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: var(--spacing-xs);
  color: var(--color-border);
}

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

.breadcrumb a:hover {
  color: var(--color-secondary);
  text-decoration: underline;
}

/* ========================================
   Tables — Zebra Rows, Sticky Header
   ======================================== */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

caption {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  padding: var(--spacing-sm);
  background-color: var(--color-bg);
}

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

@media (min-width: 768px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

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

th {
  font-weight: 600;
  font-size: 0.9375rem;
}

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

tbody tr:hover {
  background-color: #F0EBE0;
}

@media (max-width: 767px) {
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

/* ========================================
   Blockquote — Accent Border & Surface Tint
   ======================================== */
blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-surface);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-primary);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}

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

/* ========================================
   Details/Summary Accordion — Marker Control
   ======================================== */
details {
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: var(--shadow);
}

details[open] {
  box-shadow: var(--shadow);
}

summary {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
}

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

summary::marker {
  display: none;
}

summary::before {
  content: "▸";
  display: inline-block;
  margin-right: var(--spacing-xs);
  transition: transform 0.2s ease;
  color: var(--color-accent);
}

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

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

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

details p {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-md);
}

.faq-group {
  margin-bottom: var(--spacing-lg);
}

.faq-group h3 {
  font-size: 1.25rem;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

.faq-group > p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-muted);
}

/* ========================================
   Link Lists
   ======================================== */
.link-list {
  list-style: none;
  margin-top: var(--spacing-md);
}

.link-list li {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  position: relative;
}

.link-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

/* ========================================
   Footer — Flexbox Cluster
   ======================================== */
.site-footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  padding: var(--spacing-md) 0;
  text-align: center;
  border-top: 2px solid var(--color-secondary);
}

.site-footer p {
  margin: 0;
  font-size: 0.875rem;
}

/* ========================================
   Transitions — Gated by prefers-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;
  }
}

/* ========================================
   Responsive Typography
   ======================================== */
@media (min-width: 768px) {
  h1 {
    font-size: 2.75rem;
  }
  h2 {
    font-size: 2.125rem;
  }
  h3 {
    font-size: 1.625rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3rem;
  }
  h2 {
    font-size: 2.25rem;
  }
  h3 {
    font-size: 1.75rem;
  }
}

/* ========================================
   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;
}

/* ========================================
   Focus Styles — Accessible Outlines
   ======================================== */
*:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

/* ========================================
   Print Styles
   ======================================== */
@media print {
  body {
    background-color: white;
    color: black;
  }
  .site-header,
  .site-footer,
  .main-nav {
    display: none;
  }
  a {
    text-decoration: underline;
    color: black;
  }
  a[href^="http"]::after {
    content: " (" attr(href) ")";
  }
}