* {
  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: 4px;
  --transition-speed: 0.2s;
}

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

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--color-secondary);
  text-shadow: 0 1px 2px rgba(13, 148, 136, 0.1);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  border-bottom: 3px solid var(--color-primary);
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 0.4rem;
}

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;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

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

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

strong {
  font-weight: 600;
  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: 1rem 1.5rem;
  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;
}

.site-header {
  background-color: var(--color-secondary);
  color: var(--color-bg);
  padding: 1.5rem 1rem;
  border-bottom: 4px solid var(--color-primary);
  box-shadow: 0 2px 8px rgba(12, 53, 48, 0.15);
}

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

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

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

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

.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-secondary);
  border-bottom: none;
  border-right: 1px solid var(--color-border);
  text-align: center;
  font-weight: 500;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

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

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

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

.breadcrumbs {
  margin-bottom: 1.5rem;
  padding: 0.75rem 1rem;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

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

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

.breadcrumbs li:not(:last-child)::after {
  content: "›";
  margin-left: 0.5rem;
  color: var(--color-text-muted);
}

.breadcrumbs a {
  color: var(--color-primary);
  border-bottom: none;
}

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

.card {
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: box-shadow var(--transition-speed) ease, border-color var(--transition-speed) 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: 1.5rem 0;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
}

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

table th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 3px solid var(--color-primary);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

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

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

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

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

details {
  margin: 1rem 0;
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

summary {
  padding: 1rem 1.5rem;
  background-color: var(--color-surface);
  cursor: pointer;
  font-weight: 600;
  color: var(--color-secondary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background-color var(--transition-speed) ease;
  user-select: none;
}

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

summary::after {
  content: "▼";
  font-size: 0.875rem;
  transition: transform var(--transition-speed) ease;
}

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

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 var(--transition-speed) 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: 2rem 1rem;
  margin-top: 3rem;
  border-top: 4px solid var(--color-primary);
}

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

.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);
}

button, input[type="submit"], input[type="button"] {
  background-color: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

button:hover, input[type="submit"]:hover, input[type="button"]:hover {
  background-color: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 0 2px 8px rgba(13, 148, 136, 0.3);
}

button:focus-visible, input[type="submit"]:focus-visible, input[type="button"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

input[type="text"], input[type="email"], input[type="tel"], input[type="url"], input[type="search"], 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);
  border-radius: var(--radius);
  transition: border-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

input[type="text"]:focus, input[type="email"]:focus, input[type="tel"]:focus, input[type="url"]:focus, input[type="search"]:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

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

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

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);
  border-radius: var(--radius);
}

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header {
    padding: 2rem 1.5rem;
  }

  .site-nav a {
    padding: 1rem 2rem;
  }

  .site-main {
    padding: 3rem 1.5rem;
  }

  .card {
    padding: 2rem;
  }

  table th, table td {
    padding: 1rem 1.5rem;
  }

  .site-footer {
    padding: 3rem 1.5rem;
  }
}

@media (min-width: 1024px) {
  .site-header .container {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
  }

  .site-nav ul {
    justify-content: center;
  }

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

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

@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, .site-footer {
    display: none;
  }

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

  .site-main {
    padding: 1rem 0;
  }

  .container {
    max-width: 100%;
  }

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

  .card {
    border: 1px solid #000;
    page-break-inside: avoid;
  }

  table {
    page-break-inside: avoid;
  }
}