:root {
  --color-primary: #1E4D8F;
  --color-secondary: #0F8A7A;
  --color-accent: #E24A3B;
  --color-background: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #121417;
  --color-text-muted: #4C5561;
  --color-border: #D6D2C8;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(18, 20, 23, 0.08);
  --space: clamp(14px, 2.2vw, 22px);
  --transition-speed: 0.2s;
}

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 100%;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--color-surface);
  padding: 0.5rem 1rem;
  text-decoration: none;
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  top: 0;
}

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space) calc(var(--space) * 1.5);
  box-shadow: var(--shadow);
}

header .header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: calc(var(--space) * 0.75);
}

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  text-decoration: none;
  line-height: 1.2;
}

.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 {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 4px;
  border-radius: 2px;
}

.breadcrumbs {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 0.75) calc(var(--space) * 1.5);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs nav {
  max-width: 1400px;
  margin: 0 auto;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.875rem;
}

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

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

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

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

main {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: calc(var(--space) * 2) calc(var(--space) * 1.5);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: calc(var(--space) * 0.75);
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: calc(var(--space) * 1.25);
}

h2 {
  font-size: clamp(1.625rem, 4vw, 2.25rem);
  margin-top: calc(var(--space) * 2.5);
  margin-bottom: var(--space);
}

h3 {
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  margin-top: calc(var(--space) * 2);
  margin-bottom: calc(var(--space) * 0.75);
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  margin-top: calc(var(--space) * 1.5);
}

p {
  margin-bottom: calc(var(--space) * 1.25);
  max-width: 75ch;
}

a {
  color: var(--color-primary);
  transition: color var(--transition-speed) ease;
}

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

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

section {
  margin-bottom: calc(var(--space) * 3);
}

.hero {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 2.5);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: calc(var(--space) * 3);
}

blockquote {
  margin: calc(var(--space) * 2) 0;
  padding: calc(var(--space) * 1.25) calc(var(--space) * 1.5);
  background-color: rgba(15, 138, 122, 0.05);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-text);
}

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

aside {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 2) 0;
  box-shadow: var(--shadow);
}

aside h3, aside h4 {
  margin-top: 0;
}

.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 2) 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-surface);
  font-size: 0.9375rem;
  min-width: 600px;
}

caption {
  font-weight: 700;
  font-size: 1.125rem;
  text-align: left;
  padding: calc(var(--space) * 1.25);
  background-color: var(--color-surface);
  color: var(--color-text);
  letter-spacing: -0.01em;
  border-bottom: 2px solid var(--color-primary);
}

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

th {
  text-align: left;
  padding: calc(var(--space) * 0.875) calc(var(--space) * 1.25);
  font-weight: 600;
  letter-spacing: 0.01em;
  font-size: 0.875rem;
  text-transform: uppercase;
}

td {
  padding: calc(var(--space) * 0.875) calc(var(--space) * 1.25);
  border-bottom: 1px solid var(--color-border);
}

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

tbody tr:nth-child(even) {
  background-color: rgba(246, 244, 239, 0.5);
}

tbody tr:hover {
  background-color: rgba(30, 77, 143, 0.05);
}

@media (min-width: 1024px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: calc(var(--space) * 1.25);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(18, 20, 23, 0.04);
  transition: box-shadow var(--transition-speed) ease;
}

details:hover {
  box-shadow: var(--shadow);
}

details[open] {
  box-shadow: var(--shadow);
}

summary {
  padding: calc(var(--space) * 1.25);
  font-weight: 600;
  font-size: 1.0625rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  user-select: none;
}

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

summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition-speed) ease, color var(--transition-speed) ease;
  flex-shrink: 0;
  margin-left: 1rem;
}

details[open] summary::after {
  transform: rotate(45deg);
  color: var(--color-accent);
}

summary:hover {
  background-color: rgba(30, 77, 143, 0.03);
  color: var(--color-primary);
}

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

details .details-content {
  padding: 0 calc(var(--space) * 1.25) calc(var(--space) * 1.25);
  color: var(--color-text);
}

details[open] .details-content {
  animation: slideDown var(--transition-speed) ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

ul, ol {
  margin-bottom: calc(var(--space) * 1.25);
  padding-left: calc(var(--space) * 1.75);
}

li {
  margin-bottom: calc(var(--space) * 0.5);
}

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: calc(var(--space) * 2) calc(var(--space) * 1.5);
  margin-top: calc(var(--space) * 4);
}

footer .footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: calc(var(--space) * 1.5);
}

footer nav ul {
  padding-left: 0;
  margin-bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.5);
  list-style: none;
}

footer nav li {
  margin-bottom: 0;
}

footer nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

footer nav a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

footer p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

@media (min-width: 768px) {
  header .header-inner {
    flex-wrap: nowrap;
  }

  .hero {
    padding: calc(var(--space) * 3.5);
  }

  footer .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .table-wrapper {
    border-radius: var(--radius);
  }
}

@media (min-width: 1024px) {
  main {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--space) * 2);
  }

  table {
    font-size: 1rem;
  }

  th, td {
    padding: var(--space) calc(var(--space) * 1.5);
  }
}

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

  details[open] .details-content {
    animation: none;
  }
}

@media print {
  body {
    background-color: white;
    color: black;
  }

  header, footer, nav, .breadcrumbs, aside {
    display: none;
  }

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

  a {
    color: black;
    text-decoration: underline;
  }

  details {
    border: 1px solid black;
  }

  details summary::after {
    display: none;
  }

  details .details-content {
    display: block !important;
  }

  table {
    border: 1px solid black;
  }

  th, td {
    border: 1px solid black;
  }
}