* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #2d6a4f;
  --color-secondary: #1b4332;
  --color-accent: #d8f3dc;
  --color-bg: #ffffff;
  --color-surface: #f0faf4;
  --color-text: #1b3a2a;
  --color-text-muted: #5c7a6b;
  --color-border: #c8ddd0;
  --font-main: 'Courier New', 'Lucida Console', Monaco, monospace;
  --max-width: 1100px;
  --radius: 16px;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface) 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1 {
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-secondary);
  text-shadow: 2px 2px 0 var(--color-accent);
  font-weight: bold;
}

h2 {
  font-size: 2rem;
  line-height: 1.3;
  margin-bottom: 1.25rem;
  margin-top: 2rem;
  color: var(--color-primary);
  text-shadow: 1px 1px 0 var(--color-accent);
  font-weight: bold;
}

h3 {
  font-size: 1.5rem;
  line-height: 1.4;
  margin-bottom: 1rem;
  margin-top: 1.5rem;
  color: var(--color-primary);
  font-weight: bold;
}

h4 {
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  margin-top: 1.25rem;
  color: var(--color-text);
  font-weight: bold;
}

h5 {
  font-size: 1.1rem;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  margin-top: 1rem;
  color: var(--color-text);
  font-weight: bold;
}

h6 {
  font-size: 1rem;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  margin-top: 1rem;
  color: var(--color-text-muted);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: 1.25rem;
}

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

a:hover {
  color: var(--color-secondary);
  text-shadow: 1px 1px 0 var(--color-accent);
}

a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

strong {
  font-weight: bold;
  color: var(--color-secondary);
}

em {
  font-style: italic;
  color: var(--color-text-muted);
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.site-header {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  padding: 2rem 1.5rem;
  border-bottom: 4px solid var(--color-accent);
  box-shadow: 0 4px 12px rgba(27, 67, 50, 0.15);
}

.site-header h1 {
  color: var(--color-bg);
  text-shadow: 3px 3px 0 rgba(0, 0, 0, 0.2);
  margin: 0;
}

.site-header p {
  color: var(--color-accent);
  margin: 0.5rem 0 0 0;
  font-size: 1.1rem;
}

.site-nav {
  background: var(--color-surface);
  padding: 0;
  border-bottom: 2px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(27, 67, 50, 0.1);
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-nav li {
  flex: 1 1 auto;
}

.site-nav a {
  display: block;
  padding: 1rem 1.5rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: bold;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  text-align: center;
}

.site-nav a:hover {
  background-color: var(--color-accent);
  border-bottom-color: var(--color-primary);
  text-shadow: 1px 1px 0 rgba(45, 106, 79, 0.1);
}

.site-nav a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: -3px;
  border-radius: 0;
}

.site-main {
  flex: 1;
  padding: 2rem 1.5rem;
  width: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-footer {
  background: var(--color-secondary);
  color: var(--color-accent);
  padding: 2.5rem 1.5rem;
  margin-top: 4rem;
  border-top: 4px solid var(--color-primary);
}

.site-footer p {
  text-align: center;
  margin: 0.5rem 0;
}

.site-footer a {
  color: var(--color-accent);
  text-decoration: underline;
}

.site-footer a:hover {
  color: var(--color-bg);
  text-shadow: none;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

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

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

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

.card {
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px rgba(27, 67, 50, 0.08);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  box-shadow: 0 6px 20px rgba(27, 67, 50, 0.15);
  border-color: var(--color-primary);
}

.card h2:first-child,
.card h3:first-child {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg);
}

thead {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
}

th {
  padding: 1rem;
  text-align: left;
  font-weight: bold;
  border-bottom: 3px solid var(--color-accent);
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.2);
}

td {
  padding: 1rem;
  border-bottom: 2px solid var(--color-border);
}

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

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

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

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

blockquote {
  background: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  padding: 1.5rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-text-muted);
  box-shadow: 0 2px 8px rgba(27, 67, 50, 0.08);
}

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

details {
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0;
  margin: 1.5rem 0;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

details:hover {
  border-color: var(--color-primary);
}

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

summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: bold;
  color: var(--color-primary);
  background: linear-gradient(90deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border-bottom: 2px solid transparent;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  user-select: none;
  outline: none;
}

summary:hover {
  background: var(--color-accent);
  text-shadow: 1px 1px 0 rgba(45, 106, 79, 0.1);
}

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

details[open] summary {
  border-bottom-color: var(--color-border);
  background: var(--color-accent);
}

details > *:not(summary) {
  padding: 1.5rem;
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

ul:not(.site-nav ul) {
  list-style: none;
  margin: 1.5rem 0;
  padding-left: 0;
}

ul:not(.site-nav ul) li {
  padding-left: 2rem;
  margin-bottom: 0.75rem;
  position: relative;
}

ul:not(.site-nav ul) li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

ol {
  list-style: decimal;
  margin: 1.5rem 0;
  padding-left: 2rem;
}

ol li {
  margin-bottom: 0.75rem;
  padding-left: 0.5rem;
}

@media (min-width: 768px) {
  body {
    font-size: 17px;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header {
    padding: 3rem 2rem;
  }

  .site-nav a {
    padding: 1.25rem 2rem;
  }

  .site-main {
    padding: 3rem 2rem;
  }

  .site-footer {
    padding: 3rem 2rem;
  }

  .card {
    padding: 2.5rem;
  }

  table {
    font-size: 0.95rem;
  }

  th,
  td {
    padding: 1.25rem;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 18px;
  }

  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  .site-header {
    padding: 3.5rem 2rem;
  }

  .site-main {
    padding: 4rem 2rem;
  }

  .card {
    padding: 3rem;
  }
}

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

  details > *:not(summary) {
    animation: none;
  }
}

@media print {
  body {
    background: white;
  }

  .site-nav {
    display: none;
  }

  .site-header {
    background: white;
    color: black;
    border-bottom: 2px solid black;
    box-shadow: none;
  }

  .site-header h1 {
    color: black;
    text-shadow: none;
  }

  .site-footer {
    background: white;
    color: black;
    border-top: 2px solid black;
  }

  .site-main {
    max-width: 100%;
    padding: 1rem;
  }

  .card {
    border: 2px solid black;
    box-shadow: none;
    page-break-inside: avoid;
  }

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }

  table {
    border: 2px solid black;
    page-break-inside: avoid;
  }

  thead {
    background: #e0e0e0;
    color: black;
  }

  th {
    text-shadow: none;
    border-bottom: 2px solid black;
  }

  tbody tr:nth-child(even) {
    background: #f5f5f5;
  }

  blockquote {
    border-left: 4px solid black;
    background: #f5f5f5;
    box-shadow: none;
  }
}