:root {
  --color-bg: #F7F7FB;
  --color-surface: #FFFFFF;
  --color-text: #111827;
  --color-muted: #4B5563;
  --color-border: #D6D9E6;
  --color-primary: #2B3A67;
  --color-secondary: #1F7A8C;
  --color-accent: #F4D35E;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.10);
  --space: 1rem;
  --maxw: 72rem;
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: calc(var(--space) * 0.75);
  color: var(--color-primary);
}

h1 {
  font-size: 2.25rem;
  letter-spacing: -0.02em;
  margin-bottom: var(--space);
}

h2 {
  font-size: 1.875rem;
  letter-spacing: -0.015em;
  margin-top: calc(var(--space) * 2);
}

h3 {
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin-top: calc(var(--space) * 1.5);
}

h4 {
  font-size: 1.25rem;
}

h5 {
  font-size: 1.125rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--space);
  max-width: 65ch;
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

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

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

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

.container {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
}

header {
  grid-column: 1;
  padding: calc(var(--space) * 1.5) 0;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-surface);
  margin: 0 calc(var(--space) * -1);
  padding-left: var(--space);
  padding-right: var(--space);
}

header .header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

header .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

header .site-name a {
  color: inherit;
}

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

nav li {
  margin: 0;
}

nav a {
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

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

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

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

.breadcrumbs nav {
  display: flex;
  align-items: center;
  gap: calc(var(--space) * 0.5);
}

.breadcrumbs ul {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 0.5);
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumbs li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: calc(var(--space) * 0.5);
}

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

.breadcrumbs a {
  color: var(--color-muted);
}

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

main {
  grid-column: 1;
  padding: calc(var(--space) * 2) 0;
}

article,
section,
aside {
  margin-bottom: calc(var(--space) * 2);
}

section section {
  margin-top: calc(var(--space) * 1.5);
  margin-bottom: calc(var(--space) * 1.5);
}

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

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-muted);
}

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-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 0.9375rem;
}

table caption {
  font-weight: 700;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 1rem;
  letter-spacing: -0.01em;
}

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

th {
  text-align: left;
  padding: calc(var(--space) * 0.75) var(--space);
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

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

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

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

tbody tr:hover {
  background-color: rgba(31, 122, 140, 0.05);
}

tbody tr:last-child td {
  border-bottom: none;
}

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

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

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

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

summary::before {
  content: "▸";
  display: inline-block;
  transition: transform 0.2s ease;
  font-size: 0.875rem;
}

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

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

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

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

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

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

footer {
  grid-column: 1;
  padding: calc(var(--space) * 1.5) 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  margin: 0 calc(var(--space) * -1);
  padding-left: var(--space);
  padding-right: var(--space);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-muted);
}

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space);
  align-items: center;
}

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

footer nav li {
  margin: 0;
}

footer a {
  color: var(--color-muted);
}

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

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

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

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

  nav ul {
    gap: calc(var(--space) * 2);
  }

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

  .container {
    padding: 0 calc(var(--space) * 2);
  }

  header {
    padding-left: calc(var(--space) * 2);
    padding-right: calc(var(--space) * 2);
    margin: 0 calc(var(--space) * -2);
  }

  footer {
    padding-left: calc(var(--space) * 2);
    padding-right: calc(var(--space) * 2);
    margin: 0 calc(var(--space) * -2);
  }
}

@media (min-width: 1024px) {
  table {
    font-size: 1rem;
  }

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

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

@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%;
  }

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

  details {
    border: 1px solid black;
  }

  details[open] summary {
    border-bottom: 1px solid black;
  }

  table {
    box-shadow: none;
    border: 1px solid black;
  }

  thead {
    background-color: #f0f0f0;
    color: black;
  }

  tbody tr:nth-child(even) {
    background-color: #f9f9f9;
  }
}