:root {
  --cp-bg: #F6F2EA;
  --cp-surface: #FFFFFF;
  --cp-text: #1B1E24;
  --cp-muted: #5B6472;
  --cp-border: #D8D1C6;
  --cp-primary: #1F6F5B;
  --cp-secondary: #2B3A67;
  --cp-accent: #D98E2B;
  --cp-radius: 14px;
  --cp-shadow: 0 10px 30px rgba(27, 30, 36, 0.10);
  --cp-max: 1120px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1.6;
  color: var(--cp-text);
  background-color: var(--cp-bg);
  margin: 0;
  padding: 0;
  font-size: clamp(1rem, 2.5vw, 1.125rem);
}

.page-grid {
  display: grid;
  grid-template-areas:
    "header"
    "main"
    "footer";
  min-height: 100vh;
}

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

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--cp-max);
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

.nav-brand h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--cp-primary);
  font-weight: bold;
}

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

.nav-links a {
  color: var(--cp-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

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

main {
  grid-area: main;
  max-width: var(--cp-max);
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.breadcrumbs {
  margin-bottom: 2rem;
  font-size: 0.9rem;
  color: var(--cp-muted);
}

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

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

article {
  background-color: var(--cp-surface);
  border-radius: var(--cp-radius);
  padding: 3rem;
  box-shadow: var(--cp-shadow);
  margin-bottom: 2rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.2;
  margin-bottom: 2rem;
  color: var(--cp-primary);
  max-width: 65ch;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1.3;
  margin: 3rem 0 1.5rem 0;
  color: var(--cp-secondary);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  line-height: 1.4;
  margin: 2rem 0 1rem 0;
  color: var(--cp-text);
}

p {
  max-width: 70ch;
  margin-bottom: 1.5rem;
}

a {
  color: var(--cp-primary);
  transition: color 0.2s ease;
}

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

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

a[rel="external"]::after {
  content: " ↗";
  font-size: 0.8em;
  color: var(--cp-muted);
}

ul, ol {
  max-width: 65ch;
  margin-bottom: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

blockquote {
  border-left: 4px solid var(--cp-accent);
  background-color: var(--cp-bg);
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-radius: 0 var(--cp-radius) var(--cp-radius) 0;
  font-style: italic;
  font-size: 1.1em;
  max-width: 60ch;
}

blockquote p {
  margin: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background-color: var(--cp-surface);
  border-radius: var(--cp-radius);
  overflow: hidden;
  box-shadow: var(--cp-shadow);
}

caption {
  font-weight: bold;
  margin-bottom: 1rem;
  color: var(--cp-secondary);
  text-align: left;
  font-size: 1.1em;
}

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

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

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

tbody tr:hover {
  background-color: rgba(31, 111, 91, 0.05);
}

details {
  margin-bottom: 1rem;
  border: 1px solid var(--cp-border);
  border-radius: var(--cp-radius);
  overflow: hidden;
}

details[open] {
  border-color: var(--cp-accent);
}

summary {
  padding: 1.5rem;
  background-color: var(--cp-surface);
  cursor: pointer;
  font-weight: bold;
  color: var(--cp-secondary);
  transition: background-color 0.2s ease;
  list-style: none;
}

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

summary::before {
  content: "▶";
  margin-right: 0.5rem;
  transition: transform 0.2s ease;
  display: inline-block;
}

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

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

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

.faq-answer {
  padding: 1.5rem;
  background-color: var(--cp-bg);
  border-top: 1px solid var(--cp-border);
}

.faq-answer p {
  margin-bottom: 1rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

footer {
  grid-area: footer;
  background-color: var(--cp-secondary);
  color: var(--cp-surface);
  text-align: center;
  padding: 2rem 1.5rem;
  margin-top: auto;
}

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

@media (min-width: 768px) {
  .page-grid {
    grid-template-areas:
      "header header"
      "main aside"
      "footer footer";
    grid-template-columns: 1fr 300px;
  }
  
  nav {
    padding: 1.5rem 2rem;
  }
  
  .nav-links {
    gap: 3rem;
  }
  
  main {
    padding: 3rem 2rem;
  }
  
  article {
    padding: 4rem;
  }
}

@media (min-width: 1024px) {
  .page-grid {
    grid-template-areas:
      "header header header"
      "aside main sidebar"
      "footer footer footer";
    grid-template-columns: 250px 1fr 250px;
  }
  
  table {
    position: relative;
  }
  
  th {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto !important;
  }
}

@media (max-width: 767px) {
  .nav-links {
    gap: 1rem;
  }
  
  .nav-links a {
    font-size: 0.9rem;
  }
  
  article {
    padding: 2rem 1.5rem;
  }
  
  table {
    font-size: 0.9rem;
  }
  
  th, td {
    padding: 0.75rem 0.5rem;
  }
}

.external-resources {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--cp-border);
}

.faq-table {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--cp-border);
}