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

:root {
  --color-primary: #0d9488;
  --color-secondary: #134e4a;
  --color-accent: #99f6e4;
  --color-bg: #ffffff;
  --color-surface: #f0fdfa;
  --color-text: #0c3530;
  --color-text-muted: #5b8a83;
  --color-border: #b8ddd6;
  --font-main: 'Verdana', 'Geneva', 'Tahoma', sans-serif;
  --max-width: 1100px;
  --radius: 0;
  --transition: 0.2s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: bold;
  margin-bottom: 0.75rem;
  color: var(--color-secondary);
  text-shadow: 1px 1px 0 rgba(153, 246, 228, 0.3);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  border-bottom: 4px solid var(--color-primary);
  padding-bottom: 0.5rem;
  display: inline-block;
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  border-left: 6px solid var(--color-primary);
  padding-left: 1rem;
}

h3 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
  color: var(--color-primary);
}

h4 {
  font-size: 1.25rem;
  margin-top: 1.25rem;
}

h5 {
  font-size: 1.125rem;
  margin-top: 1rem;
}

h6 {
  font-size: 1rem;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background-color var(--transition);
  font-weight: 600;
}

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

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  background-color: var(--color-surface);
}

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

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

::selection {
  background-color: var(--color-accent);
  color: var(--color-secondary);
}

blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-muted);
  box-shadow: 3px 3px 0 rgba(13, 148, 136, 0.15);
}

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

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: 1.5rem 1rem;
  border-bottom: 5px solid var(--color-accent);
  box-shadow: 0 4px 0 rgba(13, 148, 136, 0.2);
}

.site-header h1 {
  color: var(--color-bg);
  border-bottom: none;
  text-shadow: 2px 2px 0 rgba(153, 246, 228, 0.4);
  margin: 0;
}

.site-nav {
  background-color: var(--color-primary);
  padding: 0;
  border-bottom: 3px solid var(--color-secondary);
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

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

.site-nav a {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--color-bg);
  border-bottom: none;
  border-right: 2px solid var(--color-secondary);
  text-align: center;
  font-weight: bold;
  transition: background-color var(--transition), box-shadow var(--transition);
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.3);
}

.site-nav a:hover {
  background-color: var(--color-secondary);
  color: var(--color-accent);
  box-shadow: inset 0 -4px 0 var(--color-accent);
}

.site-nav a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: -3px;
  background-color: var(--color-secondary);
}

.site-nav li:last-child a {
  border-right: none;
}

.site-main {
  padding: 2rem 1rem;
}

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

.breadcrumbs {
  padding: 0.75rem 0;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  border-bottom: 2px solid var(--color-border);
}

.breadcrumbs ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs li::after {
  content: '→';
  color: var(--color-text-muted);
  font-weight: bold;
}

.breadcrumbs li:last-child::after {
  content: '';
}

.breadcrumbs a {
  color: var(--color-text-muted);
  border-bottom: 1px solid transparent;
}

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

.breadcrumbs li:last-child a {
  color: var(--color-text);
  pointer-events: none;
}

.card {
  background-color: var(--color-surface);
  border: 3px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 5px 5px 0 rgba(13, 148, 136, 0.1);
  transition: box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: 8px 8px 0 rgba(13, 148, 136, 0.2);
  border-color: var(--color-primary);
}

.card h2,
.card h3,
.card h4 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5rem 0;
  background-color: var(--color-bg);
  border: 3px solid var(--color-border);
  box-shadow: 4px 4px 0 rgba(13, 148, 136, 0.1);
}

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

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

td {
  padding: 0.875rem 1rem;
  border-bottom: 2px solid var(--color-border);
}

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

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

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

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

details {
  margin: 1.5rem 0;
  border: 3px solid var(--color-border);
  background-color: var(--color-surface);
  box-shadow: 4px 4px 0 rgba(13, 148, 136, 0.1);
}

summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: bold;
  color: var(--color-secondary);
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  transition: background-color var(--transition), color var(--transition);
  user-select: none;
  list-style: none;
  position: relative;
}

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

summary::before {
  content: '▶';
  display: inline-block;
  margin-right: 0.75rem;
  transition: transform var(--transition);
  color: var(--color-primary);
}

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

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

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

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

details[open] summary {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

details[open] summary::before {
  color: var(--color-accent);
}

details > *:not(summary) {
  padding: 1.25rem;
  animation: slideDown var(--transition);
}

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

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: 2rem 1rem;
  margin-top: 3rem;
  border-top: 5px solid var(--color-accent);
}

.site-footer a {
  color: var(--color-accent);
  border-bottom-color: transparent;
}

.site-footer a:hover {
  color: var(--color-bg);
  border-bottom-color: var(--color-bg);
}

.site-footer p {
  margin-bottom: 0.5rem;
}

button,
input[type="submit"],
input[type="button"] {
  font-family: var(--font-main);
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 3px solid var(--color-secondary);
  font-weight: bold;
  cursor: pointer;
  box-shadow: 4px 4px 0 rgba(19, 78, 74, 0.3);
  transition: background-color var(--transition), box-shadow var(--transition), transform var(--transition);
  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.2);
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background-color: var(--color-secondary);
  box-shadow: 6px 6px 0 rgba(19, 78, 74, 0.4);
  transform: translate(-2px, -2px);
}

button:active,
input[type="submit"]:active,
input[type="button"]:active {
  box-shadow: 2px 2px 0 rgba(19, 78, 74, 0.3);
  transform: translate(2px, 2px);
}

button:focus-visible,
input[type="submit"]:focus-visible,
input[type="button"]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

input[type="text"],
input[type="email"],
input[type="search"],
input[type="tel"],
input[type="url"],
input[type="number"],
textarea,
select {
  font-family: var(--font-main);
  padding: 0.75rem;
  border: 3px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  width: 100%;
  max-width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="search"]:focus,
input[type="tel"]:focus,
input[type="url"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(153, 246, 228, 0.4);
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
  color: var(--color-secondary);
}

form {
  margin: 1.5rem 0;
}

fieldset {
  border: 3px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  background-color: var(--color-surface);
}

legend {
  padding: 0 0.75rem;
  font-weight: bold;
  color: var(--color-secondary);
  background-color: var(--color-bg);
}

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

li {
  margin-bottom: 0.5rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 3px solid var(--color-border);
  box-shadow: 5px 5px 0 rgba(13, 148, 136, 0.1);
}

hr {
  border: none;
  border-top: 3px solid var(--color-border);
  margin: 2rem 0;
}

code {
  background-color: var(--color-surface);
  padding: 0.25rem 0.5rem;
  border: 2px solid var(--color-border);
  font-family: 'Courier New', monospace;
  color: var(--color-secondary);
}

pre {
  background-color: var(--color-surface);
  padding: 1rem;
  border: 3px solid var(--color-border);
  overflow-x: auto;
  margin: 1.5rem 0;
  box-shadow: 4px 4px 0 rgba(13, 148, 136, 0.1);
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

@media (min-width: 768px) {
  .site-header {
    padding: 2rem 2rem;
  }

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

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

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .card {
    padding: 2rem;
  }

  table {
    font-size: 1rem;
  }

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

@media (min-width: 1024px) {
  .site-nav ul {
    justify-content: center;
    gap: 0;
  }

  .site-nav li {
    flex: 0 1 auto;
  }

  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  .card {
    padding: 2.5rem;
  }

  details > *:not(summary) {
    padding: 1.5rem 2rem;
  }
}

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

  summary::before {
    transition: none;
  }

  details[open] summary::before {
    transform: none;
  }
}

@media print {
  .site-header {
    border-bottom: 2px solid #000;
    box-shadow: none;
  }

  .site-nav {
    display: none;
  }

  .site-footer {
    border-top: 2px solid #000;
    margin-top: 2rem;
    padding: 1rem;
  }

  .breadcrumbs {
    display: none;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .card {
    border: 2px solid #000;
    box-shadow: none;
    page-break-inside: avoid;
  }

  table {
    border: 2px solid #000;
    box-shadow: none;
  }

  img {
    border: 1px solid #000;
    box-shadow: none;
  }

  details {
    border: 2px solid #000;
    box-shadow: none;
  }

  details summary {
    display: block;
  }

  details[open] summary ~ * {
    display: block;
  }

  * {
    box-shadow: none !important;
    text-shadow: none !important;
  }
}