:root {
  --color-bg: #FFF9E8;
  --color-surface: #FFF1C9;
  --color-primary: #F2D36B;
  --color-secondary: #8FA6A1;
  --color-accent: #C77D6B;
  --color-text: #1F2328;
  --color-text-muted: #5A6460;
  --color-border: #E6D7A8;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(31, 35, 40, 0.10);
  --space: 1rem;
  --measure: 68ch;
}

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  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: 0.75em;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 1em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-top: 1.5em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 1.25em;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p, ul, ol, dl, table, details {
  margin-bottom: 1.5rem;
}

p {
  max-width: var(--measure);
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

@media (prefers-reduced-motion: no-preference) {
  a {
    transition: color 0.2s ease, text-decoration-color 0.2s ease;
  }
}

@media (prefers-reduced-motion: reduce) {
  a {
    transition: none;
  }
}

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

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

header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  padding: calc(var(--space) * 1.5) var(--space);
  box-shadow: var(--shadow);
}

header .header-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space);
}

header .site-name {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

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

header nav {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--space) * 1.5);
  align-items: center;
}

header nav a {
  font-weight: 500;
  white-space: nowrap;
}

main {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: calc(var(--space) * 2) var(--space);
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--space) * 2);
}

article {
  background-color: white;
  padding: calc(var(--space) * 2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

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

aside {
  background-color: var(--color-surface);
  padding: calc(var(--space) * 1.5);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
  margin: calc(var(--space) * 1.5) 0;
}

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

blockquote {
  background-color: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  padding: calc(var(--space) * 1.5);
  margin: calc(var(--space) * 2) 0;
  font-style: italic;
  border-radius: 0 var(--radius) var(--radius) 0;
}

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

ul, ol {
  padding-left: calc(var(--space) * 2);
  max-width: var(--measure);
}

li {
  margin-bottom: 0.5rem;
}

nav[aria-label="Breadcrumb"] {
  padding: var(--space) 0;
  margin-bottom: calc(var(--space) * 1.5);
}

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

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

nav[aria-label="Breadcrumb"] li:not(:last-child)::after {
  content: "›";
  margin-left: 0.5rem;
  color: var(--color-text-muted);
  font-weight: 700;
}

nav[aria-label="Breadcrumb"] a {
  color: var(--color-secondary);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  margin: calc(var(--space) * 2) 0;
}

table caption {
  font-weight: 700;
  font-size: 1.25rem;
  text-align: left;
  padding: var(--space);
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

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

thead th {
  font-weight: 700;
  text-align: left;
  padding: calc(var(--space) * 0.75) var(--space);
  border-bottom: 2px solid var(--color-border);
}

tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

@media (prefers-reduced-motion: reduce) {
  tbody tr {
    transition: none;
  }
}

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

tbody tr:hover {
  background-color: var(--color-surface);
}

tbody tr:focus-within {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

tbody td {
  padding: calc(var(--space) * 0.75) var(--space);
}

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

@media (min-width: 1024px) {
  thead {
    position: sticky;
    top: 0;
    z-index: 10;
  }
}

details {
  background-color: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space);
  margin-bottom: var(--space);
  box-shadow: 0 2px 8px rgba(31, 35, 40, 0.06);
}

details[open] {
  border-left: 4px solid var(--color-accent);
  padding-left: calc(var(--space) - 3px);
}

summary {
  font-weight: 700;
  font-size: 1.125rem;
  cursor: pointer;
  list-style: none;
  padding: calc(var(--space) * 0.5);
  margin: calc(var(--space) * -0.5);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, color 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

@media (prefers-reduced-motion: reduce) {
  summary {
    transition: none;
  }
}

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

summary::before {
  content: "▸";
  display: inline-block;
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
  summary::before {
    transition: none;
  }
}

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

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

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

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

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

footer {
  background-color: var(--color-surface);
  border-top: 2px solid var(--color-border);
  padding: calc(var(--space) * 2) var(--space);
  margin-top: calc(var(--space) * 3);
  text-align: center;
  color: var(--color-text-muted);
}

footer p {
  max-width: none;
  margin: 0;
}

@media (min-width: 768px) {
  header .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  main {
    grid-template-columns: 1fr;
    padding: calc(var(--space) * 3) calc(var(--space) * 2);
  }
  
  article {
    padding: calc(var(--space) * 3);
  }
}

@media (min-width: 1024px) {
  main {
    grid-template-columns: 3fr 1fr;
    gap: calc(var(--space) * 3);
  }
  
  main > aside {
    grid-column: 2;
    grid-row: 1 / span 10;
    align-self: start;
    position: sticky;
    top: calc(var(--space) * 2);
  }
}

button, input[type="submit"] {
  background-color: var(--color-primary);
  color: var(--color-text);
  border: 2px solid var(--color-border);
  padding: calc(var(--space) * 0.75) calc(var(--space) * 1.5);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.1s ease;
}

@media (prefers-reduced-motion: reduce) {
  button, input[type="submit"] {
    transition: none;
  }
}

button:hover, input[type="submit"]:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
}

button:focus-visible, input[type="submit"]:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

button:active, input[type="submit"]:active {
  transform: scale(0.98);
}

@media print {
  body {
    background-color: white;
    color: black;
  }
  
  header, footer, nav, aside {
    display: none;
  }
  
  main {
    max-width: 100%;
    padding: 0;
  }
  
  article {
    box-shadow: none;
    border: none;
    padding: 0;
  }
  
  a {
    text-decoration: underline;
    color: black;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875rem;
  }
  
  details {
    border: 1px solid black;
  }
  
  details summary::before {
    content: "";
  }
  
  details[open] summary {
    border-bottom: 1px solid black;
  }
  
  table {
    box-shadow: none;
    border: 2px solid black;
  }
  
  thead {
    background-color: #f0f0f0;
  }
  
  tbody tr {
    page-break-inside: avoid;
  }
}

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