:root {
  --color-primary: #1F3A5F;
  --color-secondary: #2E6F6D;
  --color-accent: #C06B2B;
  --color-background: #F6F3EE;
  --color-surface: #FFFFFF;
  --color-text: #14161A;
  --color-text-muted: #4B5563;
  --color-border: #D6D0C6;
  
  --radius-1: 2px;
  --shadow-1: 0 1px 3px rgba(20, 22, 26, 0.08), 0 1px 2px rgba(20, 22, 26, 0.06);
  --space-1: 1rem;
  --space-2: 2rem;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
}

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

*:focus {
  outline: none;
}

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

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

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.125rem;
  margin-top: 1.5rem;
}

@media (min-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 1.875rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3rem;
  }
  
  h2 {
    font-size: 2.25rem;
  }
  
  h3 {
    font-size: 1.75rem;
  }
}

p {
  margin-bottom: 1rem;
}

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

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

ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-1) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-1);
}

header .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

@media (min-width: 768px) {
  header .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

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

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

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

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

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

nav a:focus-visible {
  color: var(--color-accent);
}

nav[aria-label="Breadcrumb"] {
  margin-bottom: var(--space-2);
}

nav[aria-label="Breadcrumb"] ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.875rem;
}

nav[aria-label="Breadcrumb"] li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav[aria-label="Breadcrumb"] li:not(:last-child)::after {
  content: "→";
  color: var(--color-text-muted);
}

nav[aria-label="Breadcrumb"] a {
  color: var(--color-text-muted);
  text-decoration: none;
}

nav[aria-label="Breadcrumb"] a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

nav[aria-label="Breadcrumb"] [aria-current="page"] {
  color: var(--color-text);
  font-weight: 500;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-2) var(--space-1);
  width: 100%;
}

@media (min-width: 768px) {
  main {
    padding: 3rem var(--space-2);
  }
}

@media (min-width: 1024px) {
  main {
    padding: 4rem var(--space-2);
  }
}

section {
  margin-bottom: 3rem;
}

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

aside {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-1) var(--space-1) var(--space-1) 1.5rem;
  margin: var(--space-2) 0;
  box-shadow: var(--shadow-1);
}

aside h2,
aside h3,
aside h4 {
  margin-top: 0;
  font-size: 1.125rem;
  color: var(--color-accent);
}

blockquote {
  background-color: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-1) var(--space-1) var(--space-1) 1.5rem;
  margin: var(--space-2) 0;
  font-style: italic;
  color: var(--color-text-muted);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-2) 0;
  background-color: var(--color-surface);
  box-shadow: var(--shadow-1);
  font-size: 0.9375rem;
  overflow: hidden;
  border-radius: var(--radius-1);
}

@media (max-width: 767px) {
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
}

caption {
  font-weight: 700;
  text-align: left;
  padding: var(--space-1);
  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);
}

@media (min-width: 768px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

th {
  text-align: left;
  padding: 0.75rem var(--space-1);
  font-weight: 600;
  border-bottom: 2px solid var(--color-border);
}

td {
  padding: 0.75rem var(--space-1);
  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(31, 58, 95, 0.05);
}

details {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-secondary);
  border-radius: var(--radius-1);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

details:hover {
  border-left-color: var(--color-accent);
}

details[open] {
  border-left-color: var(--color-accent);
  background-color: rgba(192, 107, 43, 0.02);
}

summary {
  padding: var(--space-1);
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  color: var(--color-primary);
}

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

summary::before {
  content: "▶";
  display: inline-block;
  transition: transform 0.2s ease;
  font-size: 0.75rem;
  color: var(--color-accent);
}

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

summary:hover {
  background-color: rgba(31, 58, 95, 0.05);
  color: var(--color-accent);
}

details div {
  padding: 0 var(--space-1) var(--space-1) var(--space-1);
}

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

footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: var(--space-2) var(--space-1);
  margin-top: auto;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

footer .container {
  max-width: 1200px;
  margin: 0 auto;
}

footer p {
  margin-bottom: 0.5rem;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-1);
}

@media print {
  * {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a,
  a:visited {
    text-decoration: underline;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
  }
  
  thead {
    display: table-header-group;
  }
  
  tr,
  img {
    page-break-inside: avoid;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
  
  header,
  footer,
  nav {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
}