:root {
  --color-primary: #1F3A5F;
  --color-secondary: #2E6F6D;
  --color-accent: #D96C2C;
  --color-background: #F6F4EF;
  --color-surface: #FFFFFF;
  --color-text: #121417;
  --color-text-muted: #4B5563;
  --color-border: #D7D2C7;
  --cp-radius: 14px;
  --cp-shadow: 0 10px 30px rgba(18, 20, 23, 0.08);
  --cp-max: 72rem;
  --spacing-unit: 1.5rem;
  --transition-speed: 0.2s;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-background);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.shell {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  max-width: var(--cp-max);
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
  gap: calc(var(--spacing-unit) * 2);
}

header {
  padding-top: calc(var(--spacing-unit) * 1.5);
  padding-bottom: var(--spacing-unit);
  border-bottom: 1px solid var(--color-border);
}

header h1,
header .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-bottom: calc(var(--spacing-unit) * 0.5);
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 0.75);
  list-style: none;
  margin-top: calc(var(--spacing-unit) * 0.5);
}

.topnav a {
  display: inline-block;
  padding: 0.5rem 1rem;
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  border-radius: calc(var(--cp-radius) * 0.5);
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.topnav a:hover {
  background-color: var(--color-surface);
  color: var(--color-primary);
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-unit);
  padding: calc(var(--spacing-unit) * 0.5) 0;
}

.breadcrumbs li::after {
  content: "›";
  margin-left: 0.5rem;
  color: var(--color-border);
}

.breadcrumbs li:last-child::after {
  content: "";
}

.breadcrumbs a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

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

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

main {
  padding: calc(var(--spacing-unit) * 1.5) 0;
}

h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
}

h2 {
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  margin-top: calc(var(--spacing-unit) * 2);
  margin-bottom: var(--spacing-unit);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-top: calc(var(--spacing-unit) * 1.5);
  margin-bottom: calc(var(--spacing-unit) * 0.75);
}

p {
  margin-bottom: var(--spacing-unit);
  max-width: 70ch;
}

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

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

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

.card,
section,
article,
aside {
  background-color: var(--color-surface);
  padding: calc(var(--spacing-unit) * 1.5);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  border-radius: var(--cp-radius);
  box-shadow: var(--cp-shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--spacing-unit) * 1.5) 0;
  background-color: var(--color-surface);
  border-radius: var(--cp-radius);
  overflow: hidden;
  box-shadow: var(--cp-shadow);
  font-size: 0.9375rem;
}

caption {
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-unit);
  background-color: var(--color-primary);
  color: var(--color-surface);
  font-size: 1rem;
}

thead {
  background-color: var(--color-primary);
  color: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  letter-spacing: 0.01em;
}

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

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

tbody tr:nth-child(even) {
  background-color: rgba(31, 58, 95, 0.03);
}

tbody tr:hover {
  background-color: rgba(46, 111, 109, 0.08);
}

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

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--cp-radius);
  padding: var(--spacing-unit);
  margin-bottom: var(--spacing-unit);
  box-shadow: 0 2px 8px rgba(18, 20, 23, 0.04);
}

summary {
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  padding: 0.5rem 0;
  position: relative;
  padding-left: 1.75rem;
  transition: color var(--transition-speed) ease;
  user-select: none;
}

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

summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  width: 0;
  height: 0;
  border-left: 6px solid var(--color-accent);
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  transition: transform 0.3s ease;
}

details[open] summary::before {
  transform: translateY(-50%) rotate(90deg);
}

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

summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

details[open] {
  padding-bottom: calc(var(--spacing-unit) * 1.25);
}

details p {
  margin-top: var(--spacing-unit);
  padding-left: 1.75rem;
  color: var(--color-text);
}

blockquote {
  margin: calc(var(--spacing-unit) * 1.5) 0;
  padding: var(--spacing-unit) var(--spacing-unit) var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
  background-color: rgba(31, 58, 95, 0.04);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--cp-radius) var(--cp-radius) 0;
  font-style: italic;
  color: var(--color-text);
  position: relative;
}

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

footer {
  padding: calc(var(--spacing-unit) * 1.5) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: calc(var(--spacing-unit) * 2);
}

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

li {
  margin-bottom: 0.5rem;
}

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

em {
  font-style: italic;
}

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

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

  .shell {
    padding: 0 calc(var(--spacing-unit) * 2);
    gap: calc(var(--spacing-unit) * 2.5);
  }

  header h1,
  header .site-name {
    font-size: 1.75rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  h2 {
    font-size: 1.875rem;
  }

  h3 {
    font-size: 1.375rem;
  }

  .topnav {
    gap: var(--spacing-unit);
  }

  main {
    display: grid;
    grid-template-columns: 1fr;
    gap: calc(var(--spacing-unit) * 2);
  }

  table {
    font-size: 1rem;
  }

  th,
  td {
    padding: 1.125rem;
  }
}

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

  .shell {
    padding: 0 calc(var(--spacing-unit) * 3);
  }

  header {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  header h1,
  header .site-name {
    margin-bottom: 0;
  }

  .topnav {
    margin-top: 0;
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.125rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  main {
    grid-template-columns: 1fr;
  }
}

@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 {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  a {
    text-decoration: underline;
  }

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

  header,
  footer {
    border: none;
  }

  .topnav {
    display: none;
  }

  h1 {
    font-size: 24pt;
  }

  h2 {
    font-size: 18pt;
    page-break-after: avoid;
  }

  h3 {
    font-size: 14pt;
    page-break-after: avoid;
  }

  table {
    border-collapse: collapse;
    border: 1px solid black;
  }

  th,
  td {
    border: 1px solid black;
    padding: 8pt;
  }

  thead {
    display: table-header-group;
  }

  tr {
    page-break-inside: avoid;
  }

  details summary::before {
    display: none;
  }

  details[open] summary ~ * {
    display: block;
  }
}