:root {
  --color-primary: #2B59FF;
  --color-secondary: #0B1320;
  --color-accent: #FFB703;
  --color-background: #F7F8FB;
  --color-surface: #FFFFFF;
  --color-text: #0E1420;
  --color-text-muted: #4B5565;
  --color-border: #D6DCE8;
  
  --radius: 2px;
  --shadow: 0 1px 3px rgba(11, 19, 32, 0.08);
  --space: 1.5rem;
  --max-width: 1200px;
  
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

*:focus {
  outline: none;
}

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

html {
  font-size: 100%;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-system);
  background-color: var(--color-background);
  color: var(--color-text);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  line-height: 1.6;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "header"
    "main"
    "footer";
  min-height: 100vh;
}

body.has-aside {
  grid-template-areas:
    "header"
    "main"
    "aside"
    "footer";
}

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

header .header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

header .site-name {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--color-secondary);
}

header .site-name a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}

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

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

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

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

aside > * {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  padding: var(--space);
  box-shadow: var(--shadow);
}

footer {
  grid-area: footer;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: calc(var(--space) * 1.5);
  margin-top: calc(var(--space) * 3);
  text-align: left;
}

footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

h1 {
  font-size: clamp(2rem, 1.5rem + 2vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: calc(var(--space) * 1.5);
  color: var(--color-secondary);
}

h2 {
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-top: calc(var(--space) * 2.5);
  margin-bottom: var(--space);
  color: var(--color-secondary);
}

h3 {
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-top: calc(var(--space) * 1.5);
  margin-bottom: calc(var(--space) * 0.75);
  color: var(--color-secondary);
}

h4, h5, h6 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  margin-top: var(--space);
  margin-bottom: calc(var(--space) * 0.5);
  color: var(--color-secondary);
}

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

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-color: var(--color-accent);
}

ul:not(nav ul):not(.breadcrumb),
ol:not(.breadcrumb) {
  margin-bottom: var(--space);
  padding-left: 1.5rem;
  max-width: 70ch;
}

li {
  margin-bottom: 0.5rem;
}

.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin-bottom: calc(var(--space) * 1.5);
  font-size: 0.9rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  margin-bottom: 0;
}

.breadcrumb li::after {
  content: '›';
  margin-left: 0.5rem;
  color: var(--color-text-muted);
}

.breadcrumb li:last-child::after {
  content: '';
}

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

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

.breadcrumb li:last-child {
  color: var(--color-text);
  font-weight: 500;
}

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: 0.95rem;
  overflow: hidden;
}

table caption {
  text-align: left;
  font-weight: 600;
  font-size: 1.1rem;
  padding: var(--space);
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  color: var(--color-secondary);
}

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

th {
  text-align: left;
  padding: 0.875rem 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

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

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

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

tbody tr:hover {
  background-color: rgba(43, 89, 255, 0.05);
}

.table-wrapper {
  overflow-x: auto;
  margin: calc(var(--space) * 1.5) 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.table-wrapper table {
  margin: 0;
  border: none;
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

details[open] {
  border-left: 4px solid var(--color-accent);
}

summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  transition: background-color 0.2s ease, color 0.2s ease;
  color: var(--color-secondary);
}

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

summary::before {
  content: '▸';
  margin-right: 0.75rem;
  font-size: 0.875rem;
  transition: transform 0.3s ease;
  color: var(--color-primary);
}

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

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

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

details > *:not(summary) {
  padding: 1.25rem;
}

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

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

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

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

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

.checklist {
  list-style: none;
  padding-left: 0;
}

.checklist li {
  padding-left: 1.75rem;
  position: relative;
  margin-bottom: 0.75rem;
}

.checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

@media (min-width: 768px) {
  :root {
    --space: 2rem;
  }
  
  header .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  body.has-aside {
    grid-template-columns: 1fr 320px;
    grid-template-areas:
      "header header"
      "main aside"
      "footer footer";
  }
  
  aside {
    padding: calc(var(--space) * 2) calc(var(--space) * 1.5) calc(var(--space) * 2) 0;
  }
  
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

@media (min-width: 1024px) {
  :root {
    --space: 2.5rem;
  }
  
  body.has-aside {
    grid-template-columns: 1fr 360px;
  }
  
  main {
    padding-right: 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;
  }
  
  summary::before {
    transition: none;
  }
  
  nav a::after {
    transition: none;
  }
}

@media print {
  body {
    background-color: white;
    color: black;
    font-size: 12pt;
    line-height: 1.5;
    display: block;
  }
  
  header,
  footer,
  nav,
  aside {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
    margin: 0;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.9em;
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
    page-break-inside: avoid;
  }
  
  table, figure, img {
    page-break-inside: avoid;
  }
  
  details {
    border: 1px solid #ccc;
  }
  
  summary::before {
    content: '';
  }
  
  details > *:not(summary) {
    display: block !important;
  }
  
  thead {
    display: table-header-group;
  }
  
  tr {
    page-break-inside: avoid;
  }
}