:root {
  --color-primary: #2B2A6E;
  --color-secondary: #0E6F6A;
  --color-accent: #E24B3B;
  --color-background: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #4E5561;
  --color-border: #D7D0C6;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(26, 26, 26, 0.10);
  --maxw: 1100px;
  --space: clamp(14px, 1.6vw, 20px);
}

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

html {
  scroll-behavior: smooth;
  font-size: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.7;
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.75em;
}

h1 {
  font-size: clamp(1.875rem, 1.5rem + 1.5vw, 2.75rem);
  margin-bottom: 1em;
}

h2 {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2.125rem);
  margin-top: 1.5em;
}

h3 {
  font-size: clamp(1.25rem, 1.125rem + 0.5vw, 1.625rem);
  margin-top: 1.25em;
}

p {
  margin-bottom: 1.25em;
  max-width: 70ch;
}

a {
  color: var(--color-secondary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

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

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

body {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
}

header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

header .header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space) calc(var(--space) * 1.5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space);
}

header .site-name {
  font-size: clamp(1.25rem, 1.125rem + 0.5vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

header .site-name:hover {
  color: var(--color-secondary);
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.25);
  align-items: center;
}

nav a {
  text-decoration: none;
  font-weight: 500;
  padding: 0.5em 0.75em;
  border-radius: calc(var(--radius) / 2);
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(var(--space) * 2) calc(var(--space) * 1.5);
  width: 100%;
}

main > section,
main > article,
main > aside {
  margin-bottom: calc(var(--space) * 2.5);
}

article,
section {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

aside {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow);
}

.breadcrumbs {
  background-color: transparent;
  box-shadow: none;
  padding: 0;
  margin-bottom: calc(var(--space) * 1.5);
}

.breadcrumbs ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

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

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

.breadcrumbs a:hover {
  color: var(--color-secondary);
  text-decoration: underline;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--space) * 1.5) 0;
  background-color: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(26, 26, 26, 0.08);
}

caption {
  font-weight: 600;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 1.05rem;
}

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

th {
  padding: calc(var(--space) * 0.875);
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: calc(var(--space) * 0.875);
  border-bottom: 1px solid var(--color-border);
}

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

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

tbody tr:hover {
  background-color: rgba(14, 111, 106, 0.08);
}

@media (min-width: 768px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space);
  margin-bottom: var(--space);
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: 0 4px 12px rgba(26, 26, 26, 0.08);
}

details[open] {
  border-color: var(--color-secondary);
  box-shadow: 0 4px 16px rgba(14, 111, 106, 0.12);
}

summary {
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75em;
  padding: calc(var(--space) * 0.5);
  border-radius: calc(var(--radius) / 2);
  transition: background-color 0.2s ease, color 0.2s ease;
}

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

summary::before {
  content: "▶";
  display: inline-block;
  transition: transform 0.3s ease;
  color: var(--color-accent);
  font-size: 0.875em;
}

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

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

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

details[open] summary {
  margin-bottom: var(--space);
  padding-bottom: var(--space);
  border-bottom: 1px solid var(--color-border);
}

details p {
  padding-left: calc(var(--space) * 0.5);
  color: var(--color-text);
}

blockquote {
  background-color: var(--color-surface);
  border-left: 5px solid var(--color-accent);
  padding: calc(var(--space) * 1.25);
  margin: calc(var(--space) * 1.5) 0;
  font-style: italic;
  color: var(--color-text-muted);
  border-radius: 0 var(--radius) var(--radius) 0;
  box-shadow: 0 2px 8px rgba(26, 26, 26, 0.06);
}

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

footer {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border-top: 3px solid var(--color-secondary);
  margin-top: calc(var(--space) * 3);
}

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(var(--space) * 2) calc(var(--space) * 1.5);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space);
}

footer p {
  margin: 0;
  font-size: 0.9rem;
  max-width: none;
}

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

footer a:hover {
  color: var(--color-background);
}

ul:not(nav ul):not(.breadcrumbs ul) {
  margin-left: 1.5em;
  margin-bottom: 1.25em;
}

ol {
  margin-left: 1.5em;
  margin-bottom: 1.25em;
}

li {
  margin-bottom: 0.5em;
}

strong {
  font-weight: 600;
  color: var(--color-primary);
}

em {
  font-style: italic;
}

@media (min-width: 768px) {
  main {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--space) * 2);
  }
  
  p {
    max-width: 75ch;
  }
}

@media (min-width: 1024px) {
  header .header-inner {
    padding: calc(var(--space) * 1.25) calc(var(--space) * 2);
  }
  
  main {
    padding: calc(var(--space) * 3) calc(var(--space) * 2);
  }
  
  article,
  section,
  aside {
    padding: calc(var(--space) * 2);
  }
}

@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;
  }
  
  html {
    scroll-behavior: auto;
  }
  
  summary::before {
    transition: none;
  }
}

@media print {
  body {
    background-color: white;
    color: black;
  }
  
  header,
  footer,
  nav,
  .breadcrumbs {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
  
  article,
  section,
  aside {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  
  a {
    text-decoration: underline;
    color: black;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
  
  details {
    border: 1px solid #ccc;
  }
  
  summary::before {
    content: "";
  }
  
  details[open] summary {
    border-bottom: 1px solid #ccc;
  }
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

code {
  background-color: var(--color-background);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9em;
  color: var(--color-primary);
}

pre {
  background-color: var(--color-background);
  padding: var(--space);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: calc(var(--space) * 1.5) 0;
}

pre code {
  background-color: transparent;
  padding: 0;
}