* {
  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: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
  --radius: 0;
  --shadow-sm: 0 1px 2px rgba(13, 148, 136, 0.1);
  --shadow-md: 0 4px 6px rgba(13, 148, 136, 0.15);
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: Georgia, 'Times New Roman', serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-secondary);
  margin-bottom: 1rem;
  text-shadow: 1px 1px 2px rgba(13, 148, 136, 0.08);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--color-primary);
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

h3 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

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

h5 {
  font-size: 1.1rem;
  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;
  transition: color 0.2s ease, border-color 0.2s ease;
  border-bottom: 1px solid transparent;
}

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

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

strong {
  font-weight: 700;
  color: var(--color-secondary);
}

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

blockquote {
  margin: 2rem 0;
  padding: 1.5rem 1.5rem 1.5rem 2rem;
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-muted);
}

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

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

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: 1.5rem 0;
  border-bottom: 4px solid var(--color-primary);
  box-shadow: var(--shadow-md);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.site-header h1 {
  color: var(--color-bg);
  border-bottom: none;
  margin: 0;
  font-size: 2rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.site-nav {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: 0.75rem 0;
}

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

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: block;
  padding: 0.75rem 1.5rem;
  color: var(--color-text);
  font-weight: 600;
  border-bottom: 3px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
  border-bottom-color: var(--color-secondary);
}

.site-nav a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.site-main {
  min-height: 60vh;
  padding: 2rem 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

.breadcrumbs {
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 2rem;
}

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

.breadcrumbs li::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--color-border);
}

.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);
  border-bottom-color: var(--color-primary);
}

.card {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.card h2,
.card h3 {
  margin-top: 0;
  text-shadow: 1px 1px 2px rgba(13, 148, 136, 0.1);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
}

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

th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  border: 1px solid var(--color-primary);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

td {
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

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

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

details {
  margin: 1.5rem 0;
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
  transition: border-color 0.2s ease;
}

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

summary {
  padding: 1rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  background-color: var(--color-surface);
  color: var(--color-secondary);
  border-bottom: 2px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  user-select: none;
}

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

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

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

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

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

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);
  }
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  border-top: 4px solid var(--color-primary);
}

.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 {
  color: rgba(255, 255, 255, 0.8);
}

button,
.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

button:hover,
.button:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

button:focus-visible,
.button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

input,
textarea,
select {
  width: 100%;
  padding: 0.75rem;
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--color-secondary);
}

ul:not(.site-nav ul):not(.breadcrumbs ul) {
  margin: 1rem 0 1rem 2rem;
  list-style-type: square;
}

ol {
  margin: 1rem 0 1rem 2rem;
}

li {
  margin-bottom: 0.5rem;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 2px solid var(--color-border);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.flex-row {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.surface-section {
  background-color: var(--color-surface);
  padding: 2rem;
  border: 2px solid var(--color-border);
  margin: 2rem 0;
}

.highlight-box {
  background-color: var(--color-accent);
  color: var(--color-secondary);
  padding: 1.5rem;
  border-left: 4px solid var(--color-primary);
  margin: 1.5rem 0;
  font-weight: 600;
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header h1 {
    font-size: 2.5rem;
  }

  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .flex-row {
    flex-direction: row;
    align-items: center;
  }

  .site-main {
    padding: 3rem 0;
  }

  .site-footer {
    padding: 4rem 0 2rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.5rem;
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-nav ul {
    justify-content: flex-start;
  }

  .container {
    padding: 0 2rem;
  }
}

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

@media print {
  .site-header,
  .site-nav,
  .site-footer,
  .breadcrumbs {
    display: none;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  .site-main {
    padding: 0;
  }

  a {
    color: var(--color-text);
    text-decoration: underline;
  }

  .card {
    border: 1px solid var(--color-text);
    box-shadow: none;
    page-break-inside: avoid;
  }

  table {
    page-break-inside: avoid;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }
}