:root {
  --color-primary: #1E3A8A;
  --color-secondary: #0F766E;
  --color-accent: #E11D48;
  --color-background: #F7F7FB;
  --color-surface: #FFFFFF;
  --color-text: #0B1220;
  --color-text-muted: #4B5563;
  --color-border: #D6DAE6;
  --radius: 2px;
  --shadow: 0 1px 3px rgba(11, 18, 32, 0.08);
  --space: 1rem;
  --maxw: 1200px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

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

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow);
}

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

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

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

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.5);
  align-items: center;
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

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

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

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

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: calc(var(--space) * 3);
}

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(var(--space) * 1.5) var(--space);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  text-align: center;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: calc(var(--space) * 1.5);
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-top: calc(var(--space) * 2.5);
  margin-bottom: var(--space);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-top: calc(var(--space) * 2);
  margin-bottom: calc(var(--space) * 0.75);
}

p {
  margin-bottom: var(--space);
}

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

a {
  color: var(--color-primary);
  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-secondary);
  text-decoration-thickness: 2px;
}

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

.breadcrumbs {
  font-size: 0.875rem;
  margin-bottom: calc(var(--space) * 1.5);
  color: var(--color-text-muted);
}

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

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

.breadcrumbs span {
  margin: 0 0.5em;
}

blockquote {
  margin: calc(var(--space) * 1.5) 0;
  padding: var(--space) calc(var(--space) * 1.5);
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-surface);
  font-style: italic;
  color: var(--color-text);
  box-shadow: var(--shadow);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--space) * 1.5) 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  font-size: 0.9375rem;
  overflow: hidden;
}

caption {
  font-weight: 600;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-primary);
  caption-side: top;
  color: var(--color-text);
  font-size: 1rem;
}

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

th {
  padding: calc(var(--space) * 0.75) var(--space);
  text-align: left;
  font-weight: 600;
  letter-spacing: 0.01em;
}

td {
  padding: calc(var(--space) * 0.75) var(--space);
  border-top: 1px solid var(--color-border);
}

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

tbody tr:hover {
  background-color: rgba(30, 58, 138, 0.04);
  transition: background-color 0.2s ease;
}

.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 1.5) 0;
  box-shadow: var(--shadow);
}

details {
  margin: var(--space) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
}

summary {
  padding: var(--space) calc(var(--space) * 1.25);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: calc(var(--space) * 0.5);
  transition: background-color 0.2s ease;
  color: var(--color-text);
}

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

summary::before {
  content: "▸";
  display: inline-block;
  font-size: 0.875rem;
  transition: transform 0.2s ease;
  color: var(--color-primary);
  flex-shrink: 0;
}

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

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

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

details .details-content {
  padding: 0 calc(var(--space) * 1.25) var(--space) calc(var(--space) * 1.25);
  border-top: 1px solid var(--color-border);
}

details[open] .details-content {
  animation: slideDown 0.3s ease;
}

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

ul, ol {
  margin: var(--space) 0;
  padding-left: calc(var(--space) * 1.5);
}

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

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

section:last-child {
  margin-bottom: 0;
}

.aside-box {
  margin: calc(var(--space) * 1.5) 0;
  padding: var(--space) calc(var(--space) * 1.25);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  box-shadow: var(--shadow);
}

.aside-box h3 {
  margin-top: 0;
  font-size: 1rem;
}

@media (min-width: 768px) {
  html {
    font-size: 106.25%;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.375rem;
  }

  main {
    padding: calc(var(--space) * 3) var(--space);
  }

  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }

  .table-wrapper {
    overflow-x: visible;
  }
}

@media (min-width: 1024px) {
  html {
    font-size: 112.5%;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2rem;
  }

  main {
    padding: calc(var(--space) * 4) var(--space);
  }
}

@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;
  }

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

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

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

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

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875em;
  }

  details {
    border: 1px solid #ccc;
  }

  summary::before {
    content: "";
  }

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

  table {
    border: 1px solid black;
  }

  thead {
    background-color: #eee;
    color: black;
  }

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