/* CSS Variables - Inkberry Ledger palette */
:root {
  --color-bg: #FBF7F1;
  --color-surface: #FFFFFF;
  --color-text: #14161A;
  --color-muted: #4B5563;
  --color-border: #D7D2C8;
  --color-primary: #2A2F6B;
  --color-secondary: #0F6B5B;
  --color-accent: #C24A3A;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 22, 26, 0.08);
  --maxw: 1120px;
  --space: clamp(14px, 1.6vw, 20px);
}

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

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

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

/* Typography scale with clamp() */
h1 {
  font-size: clamp(1.875rem, 1.5rem + 1.875vw, 3rem);
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: clamp(1rem, 0.75rem + 1.25vw, 1.5rem);
}

h2 {
  font-size: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
  line-height: 1.3;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: clamp(1.5rem, 1rem + 2.5vw, 2.5rem);
  margin-bottom: clamp(0.75rem, 0.5rem + 1.25vw, 1.25rem);
}

h3 {
  font-size: clamp(1.25rem, 1.125rem + 0.625vw, 1.625rem);
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-secondary);
  margin-top: clamp(1.25rem, 0.875rem + 1.875vw, 2rem);
  margin-bottom: clamp(0.625rem, 0.5rem + 0.625vw, 1rem);
}

p {
  margin-bottom: clamp(1rem, 0.875rem + 0.625vw, 1.25rem);
}

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;
}

strong {
  font-weight: 600;
  color: var(--color-text);
}

/* Layout - Editorial grid using CSS Grid */
body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

.container {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

/* Header */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-top: clamp(1rem, 0.75rem + 1.25vw, 1.5rem);
  padding-bottom: clamp(1rem, 0.75rem + 1.25vw, 1.5rem);
  box-shadow: var(--shadow);
}

.site-header .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(1rem, 0.75rem + 1.25vw, 1.5rem);
}

.site-branding .site-name {
  font-size: clamp(1.25rem, 1.125rem + 0.625vw, 1.625rem);
  font-weight: 700;
  color: var(--color-primary);
}

/* Main navigation - Flexbox for nav items */
.main-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 0.75rem + 1.25vw, 1.5rem);
}

.main-nav a {
  text-decoration: none;
  font-weight: 500;
  color: var(--color-text);
  padding: 0.5rem 0.75rem;
  border-radius: calc(var(--radius) / 2);
  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-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Main content */
.main-content {
  padding-top: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  padding-bottom: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
}

/* Breadcrumbs */
.breadcrumbs {
  margin-bottom: clamp(1.25rem, 1rem + 1.25vw, 2rem);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.9375rem;
  color: var(--color-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;
}

/* Page header */
.page-header {
  margin-bottom: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem);
}

/* Content sections */
.content-section {
  margin-bottom: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
}

/* Production navigation list */
.production-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: clamp(0.75rem, 0.625rem + 0.625vw, 1.125rem);
  margin-top: clamp(1rem, 0.875rem + 0.625vw, 1.25rem);
}

.production-nav li {
  padding: clamp(0.875rem, 0.75rem + 0.625vw, 1.25rem);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Aside note box */
.note-box {
  margin-top: clamp(1.25rem, 1rem + 1.25vw, 2rem);
  padding: clamp(1rem, 0.875rem + 0.625vw, 1.5rem);
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.note-box p {
  margin-bottom: 0;
}

/* Blockquote styling with left border accent */
blockquote {
  margin: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem) 0;
  padding: clamp(1rem, 0.875rem + 0.625vw, 1.5rem);
  background-color: rgba(42, 47, 107, 0.04);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  font-style: italic;
  color: var(--color-text);
}

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

/* Table styling with zebra rows and sticky header */
table {
  width: 100%;
  border-collapse: collapse;
  margin: clamp(1.5rem, 1.25rem + 1.25vw, 2.25rem) 0;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

caption {
  font-weight: 600;
  font-size: clamp(1.0625rem, 1rem + 0.3125vw, 1.25rem);
  color: var(--color-primary);
  text-align: left;
  padding: clamp(0.875rem, 0.75rem + 0.625vw, 1.25rem);
  background-color: var(--color-bg);
}

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

thead th {
  padding: clamp(0.75rem, 0.625rem + 0.625vw, 1.125rem);
  text-align: left;
  font-weight: 600;
  font-size: 0.9375rem;
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

tbody tr:nth-child(even) {
  background-color: rgba(42, 47, 107, 0.02);
}

tbody tr:hover {
  background-color: rgba(15, 107, 91, 0.06);
}

tbody td {
  padding: clamp(0.75rem, 0.625rem + 0.625vw, 1.125rem);
  color: var(--color-text);
}

/* Sticky header at larger screens */
@media (min-width: 1024px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

/* Details/summary accordions with focus-visible and hover */
details {
  margin-bottom: clamp(1rem, 0.875rem + 0.625vw, 1.5rem);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

summary {
  padding: clamp(1rem, 0.875rem + 0.625vw, 1.5rem);
  font-weight: 600;
  font-size: clamp(1.0625rem, 1rem + 0.3125vw, 1.25rem);
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

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

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

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

.details-content {
  padding: 0 clamp(1rem, 0.875rem + 0.625vw, 1.5rem) clamp(1rem, 0.875rem + 0.625vw, 1.5rem);
}

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

/* Footer */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: clamp(1.25rem, 1rem + 1.25vw, 2rem);
  padding-bottom: clamp(1.25rem, 1rem + 1.25vw, 2rem);
  margin-top: auto;
}

.site-footer p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  text-align: center;
}

/* Responsive breakpoints - mobile-first */
@media (min-width: 768px) {
  .site-header .container {
    flex-wrap: nowrap;
  }

  .production-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1rem, 0.875rem + 0.625vw, 1.5rem);
  }
}

@media (min-width: 1024px) {
  .main-nav ul {
    gap: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  }
}

/* Reduced motion support */
@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;
  }

  summary::after {
    transition: none;
  }

  a,
  .main-nav a,
  tbody tr,
  summary {
    transition: none;
  }
}

/* Accessible focus-visible ring */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* Print styles */
@media print {
  .site-header,
  .site-footer,
  .breadcrumbs,
  .main-nav {
    display: none;
  }

  body {
    background-color: white;
    color: black;
  }

  a {
    text-decoration: underline;
    color: black;
  }

  details {
    border: 1px solid #ccc;
  }

  summary::after {
    display: none;
  }

  details[open] .details-content {
    display: block;
  }
}