* {
  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;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

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;
  -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;
  margin-bottom: var(--spacing-md);
  color: var(--color-secondary);
  text-shadow: 1px 1px 2px rgba(13, 148, 136, 0.1);
}

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

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

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

a:hover {
  color: var(--color-secondary);
  text-decoration-thickness: 3px;
}

a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

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

blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md);
  background-color: var(--color-surface);
  border-left: 5px 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);
}

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

.site-header {
  background-color: var(--color-surface);
  border-bottom: 3px solid var(--color-primary);
  padding: var(--spacing-md) 0;
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.1);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.site-header h1 {
  margin: 0;
  padding: 0;
  border: none;
  font-size: 1.75rem;
  text-shadow: 2px 2px 4px rgba(13, 148, 136, 0.15);
}

.site-nav {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  align-items: center;
}

.site-nav a {
  color: var(--color-secondary);
  text-decoration: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  font-weight: 500;
}

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

.site-nav a:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

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

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.site-main {
  min-height: 60vh;
  padding: var(--spacing-xl) 0;
}

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-surface);
  padding: var(--spacing-lg) 0;
  margin-top: var(--spacing-xl);
  border-top: 4px solid var(--color-primary);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

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

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

.site-footer .container {
  display: grid;
  gap: var(--spacing-md);
}

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

.card:hover {
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.15);
  border-color: var(--color-primary);
}

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

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

table thead {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: 700;
  border: 1px solid var(--color-primary);
}

table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-border);
}

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

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

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

details {
  margin: var(--spacing-md) 0;
  border: 2px solid var(--color-border);
  background-color: var(--color-surface);
  transition: border-color 0.2s ease;
}

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

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  background-color: var(--color-bg);
  border-bottom: 2px solid var(--color-border);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: transform 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

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

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

details > *:not(summary) {
  padding: var(--spacing-md);
}

button,
input[type="submit"],
input[type="button"] {
  font-family: var(--font-main);
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  font-weight: 600;
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 0 4px 8px rgba(13, 148, 136, 0.2);
}

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="password"],
input[type="search"],
input[type="url"],
input[type="tel"],
input[type="number"],
textarea,
select {
  font-family: var(--font-main);
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
input[type="search"]:hover,
input[type="url"]:hover,
input[type="tel"]:hover,
input[type="number"]:hover,
textarea:hover,
select:hover {
  border-color: var(--color-primary);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="search"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.2);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

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

ul,
ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

li {
  margin-bottom: var(--spacing-xs);
}

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

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

code {
  font-family: 'Courier New', Courier, monospace;
  background-color: var(--color-surface);
  color: var(--color-secondary);
  padding: 0.125rem 0.375rem;
  border: 1px solid var(--color-border);
  font-size: 0.9em;
}

pre {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

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

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header h1 {
    font-size: 2rem;
  }

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

  .container {
    padding: 0 var(--spacing-lg);
  }
}

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

  h2 {
    font-size: 2.5rem;
  }

  h3 {
    font-size: 2rem;
  }

  .site-header h1 {
    font-size: 2.25rem;
  }

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

  .site-main {
    padding: var(--spacing-xl) 0;
  }
}

@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;
  }
}

@media print {
  .site-nav,
  .breadcrumbs,
  button,
  input[type="submit"],
  input[type="button"] {
    display: none;
  }

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

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

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

  .card {
    border: 1px solid #000;
    box-shadow: none;
    page-break-inside: avoid;
  }

  table {
    page-break-inside: avoid;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    page-break-after: avoid;
    text-shadow: none;
  }

  img {
    max-width: 100%;
    page-break-inside: avoid;
  }
}