:root {
  --color-bg: #FBFAF7;
  --color-surface: #FFFFFF;
  --color-text: #14131A;
  --color-muted: #5E5A6B;
  --color-border: #D9D5E2;
  --color-primary: #2B2A6E;
  --color-secondary: #0F6B6A;
  --color-accent: #D14B7A;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 19, 26, 0.10);
  --maxw: 1120px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
}

/* Typography Scale with clamp() */
h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin: 0 0 1.5rem 0;
  color: var(--color-primary);
}

h2 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  line-height: 1.3;
  margin: 2rem 0 1rem 0;
  color: var(--color-primary);
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.25rem);
  line-height: 1.4;
  margin: 1.5rem 0 0.75rem 0;
  color: var(--color-secondary);
}

p {
  margin: 0 0 1rem 0;
}

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

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1rem;
}

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1rem;
  text-align: center;
  color: var(--color-muted);
}

/* Navigation with Flexbox */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem;
}

.nav-brand a {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Breadcrumbs */
.breadcrumbs {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

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

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

/* Links */
a {
  color: var(--color-secondary);
  transition: color 0.2s ease;
}

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

/* Focus-visible with accent color */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Blockquotes */
blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  margin: 2rem 0;
  padding: 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

blockquote p {
  margin: 0;
  font-style: italic;
  color: var(--color-text);
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
}

caption {
  padding: 1rem;
  font-weight: bold;
  color: var(--color-primary);
  text-align: left;
  background-color: var(--color-bg);
}

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

th {
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-weight: bold;
}

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

/* Table row hover */
tbody tr {
  transition: background-color 0.2s ease;
}

tbody tr:hover {
  background-color: var(--color-border);
}

/* Details/Summary Accordion */
details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin: 1rem 0;
  transition: all 0.2s ease;
}

details[open] {
  background-color: var(--color-bg);
  border-color: var(--color-accent);
  box-shadow: var(--shadow);
}

summary {
  padding: 1rem;
  cursor: pointer;
  font-weight: bold;
  color: var(--color-primary);
  transition: color 0.2s ease;
}

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

details[open] summary {
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1rem;
}

details p {
  padding: 0 1rem 1rem 1rem;
  margin: 0;
}

/* Aside styling */
aside {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--shadow);
}

aside h3 {
  margin-top: 0;
  color: var(--color-accent);
}

/* Lists */
ul,
ol {
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Sections */
section {
  margin: 3rem 0;
}

/* Mobile-first responsive design */
@media (max-width: 767px) {
  .nav-links {
    gap: 1rem;
  }
  
  main {
    padding: 1rem;
  }
  
  th,
  td {
    padding: 0.75rem 0.5rem;
  }
}

@media (min-width: 768px) {
  main {
    padding: 3rem 2rem;
  }
}

@media (min-width: 1024px) {
  main {
    padding: 4rem 2rem;
  }
}

/* Reduced motion preferences */
@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;
  }
}

/* Smooth scrolling for users who don't prefer reduced motion */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}