/* CSS Variables from Tête Jaune Editorial palette */
:root {
  --c-bg: #F6F3EE;
  --c-surface: #FFFFFF;
  --c-text: #1E1F22;
  --c-muted: #5A616B;
  --c-border: #D7D0C6;
  --c-primary: #2B5D4A;
  --c-secondary: #6A4C93;
  --c-accent: #D9A441;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(30, 31, 34, 0.10);
  --maxw: 1100px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
}

/* Base and reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-serif);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

/* Typography scale using clamp() for editorial feel */
h1 {
  font-size: clamp(1.875rem, 1.5rem + 1.5vw, 2.75rem);
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--c-primary);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--c-primary);
  font-weight: 600;
}

h3 {
  font-size: clamp(1.25rem, 1.125rem + 0.5vw, 1.5rem);
  line-height: 1.4;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--c-secondary);
  font-weight: 600;
}

p {
  margin-bottom: 1rem;
  max-width: 70ch;
}

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

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

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

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

/* Header and navigation */
header {
  background: var(--c-surface);
  border-bottom: 2px solid var(--c-border);
  padding: 1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-name {
  font-size: clamp(1.25rem, 1.125rem + 0.5vw, 1.5rem);
  font-weight: 700;
  color: var(--c-primary);
  font-family: var(--font-sans);
}

nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

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

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

nav a:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

/* Breadcrumbs */
.breadcrumbs {
  background: var(--c-surface);
  padding: 0.75rem 1.5rem;
  border-bottom: 1px solid var(--c-border);
  font-size: 0.9rem;
  font-family: var(--font-sans);
}

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

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

.breadcrumbs span {
  color: var(--c-muted);
}

/* Main layout: mobile-first CSS Grid */
main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 2rem 1.5rem;
  max-width: var(--maxw);
  margin: 0 auto;
  width: 100%;
}

@media (min-width: 768px) {
  main {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1024px) {
  main {
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
  }
}

article {
  background: var(--c-surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

aside {
  background: var(--c-surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  align-self: start;
  position: sticky;
  top: 1rem;
}

@media (max-width: 1023px) {
  aside {
    position: static;
  }
}

aside h2 {
  font-size: 1.125rem;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--c-secondary);
}

aside ul {
  list-style: none;
  padding-left: 0;
}

aside li {
  margin-bottom: 0.5rem;
}

/* Blockquote styling */
blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--c-bg);
  border-left: 4px solid var(--c-accent);
  border-radius: var(--radius);
  font-style: italic;
  color: var(--c-muted);
}

blockquote p {
  margin-bottom: 0;
}

/* Table styling with sticky header and horizontal scroll */
.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--c-surface);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

caption {
  font-weight: 600;
  text-align: left;
  padding: 1rem;
  background: var(--c-primary);
  color: var(--c-surface);
  border-radius: var(--radius) var(--radius) 0 0;
}

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

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

th {
  padding: 0.875rem 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--c-border);
}

td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--c-border);
}

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

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

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

/* Details/summary accordion with animated open state */
details {
  margin-bottom: 1rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  overflow: hidden;
}

summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  background: var(--c-bg);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

summary::before {
  content: '▸';
  display: inline-block;
  transition: transform 0.3s ease;
  color: var(--c-primary);
  font-size: 1.125rem;
}

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

summary:hover {
  background: var(--c-primary);
  color: var(--c-surface);
}

summary:hover::before {
  color: var(--c-surface);
}

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

details p {
  padding: 1rem 1.25rem;
  margin-bottom: 0;
}

/* Disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  summary::before {
    transition: none;
  }
  details[open] summary::before {
    transform: none;
  }
}

/* Footer */
footer {
  background: var(--c-surface);
  border-top: 2px solid var(--c-border);
  padding: 1.5rem;
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--c-muted);
}

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

/* Section spacing */
section {
  margin-bottom: 2rem;
}

section:last-child {
  margin-bottom: 0;
}

/* Ensure comfortable measure for readability */
article > p,
article > section > p {
  max-width: 70ch;
}

/* Focus-visible for all interactive elements */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

/* Responsive images (if ever added, though plan forbids them) */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utility: visually hidden but accessible to screen readers */
.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;
}