:root {
  --color-primary: #2A2F6B;
  --color-secondary: #2E7D6B;
  --color-accent: #F26A4B;
  --color-background: #FBF7F2;
  --color-surface: #FFFFFF;
  --color-text: #1B1E24;
  --color-text-muted: #5B6472;
  --color-border: #D8D0C6;
  --radius: 14px;
  --shadow: 0 10px 28px rgba(27, 30, 36, 0.10);
  --maxw: 1120px;
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font-system);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-background);
  background-image: 
    linear-gradient(135deg, rgba(42, 47, 107, 0.015) 0%, transparent 50%),
    linear-gradient(225deg, rgba(242, 106, 75, 0.012) 0%, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 100%;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

h1 {
  font-size: clamp(1.875rem, 4vw + 1rem, 3rem);
  line-height: 1.15;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw + 0.75rem, 2.25rem);
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.015em;
}

h3 {
  font-size: clamp(1.25rem, 2vw + 0.5rem, 1.75rem);
  line-height: 1.35;
  font-weight: 600;
  color: var(--color-secondary);
  margin-top: 2rem;
  margin-bottom: 0.875rem;
}

h4 {
  font-size: clamp(1.125rem, 1.5vw + 0.5rem, 1.375rem);
  line-height: 1.4;
  font-weight: 600;
  color: var(--color-secondary);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

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

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(242, 106, 75, 0.15);
  border-radius: 2px;
}

header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(27, 30, 36, 0.04);
  position: sticky;
  top: 0;
  z-index: 100;
}

header .header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

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

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
}

nav a {
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: calc(var(--radius) / 2);
  transition: background-color 0.2s ease, color 0.2s ease;
}

nav a:hover {
  background-color: rgba(42, 47, 107, 0.08);
  color: var(--color-primary);
}

nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(242, 106, 75, 0.15);
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
  width: 100%;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  list-style: none;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

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

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

section {
  margin-bottom: 3.5rem;
  background: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

section:first-of-type {
  margin-top: 1rem;
}

ul:not(.breadcrumbs):not(nav ul), ol {
  margin-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li {
  margin-bottom: 0.5rem;
}

blockquote {
  margin: 2rem 0;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(135deg, rgba(46, 125, 107, 0.06) 0%, rgba(42, 47, 107, 0.04) 100%);
  border-left: 4px solid var(--color-secondary);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-text);
  font-size: 1.0625rem;
  line-height: 1.65;
}

blockquote::before {
  content: """;
  font-size: 2.5rem;
  line-height: 0;
  vertical-align: -0.4em;
  color: var(--color-secondary);
  margin-right: 0.25rem;
  font-style: normal;
}

.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(27, 30, 36, 0.06);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  font-size: 0.9375rem;
}

caption {
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-primary);
  text-align: left;
  padding: 1rem 1.25rem;
  background: rgba(42, 47, 107, 0.04);
  border-bottom: 2px solid var(--color-border);
}

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

th {
  text-align: left;
  padding: 1rem 1.25rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

tbody tr:nth-child(odd) {
  background: rgba(42, 47, 107, 0.02);
}

tbody tr:hover {
  background: rgba(242, 106, 75, 0.06);
  transition: background-color 0.2s ease;
}

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

details {
  margin: 1.5rem 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(27, 30, 36, 0.04);
  transition: box-shadow 0.2s ease;
}

details:hover {
  box-shadow: 0 4px 16px rgba(27, 30, 36, 0.08);
}

details[open] {
  border-color: var(--color-secondary);
}

summary {
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: background-color 0.2s ease, color 0.2s ease;
  user-select: none;
}

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

summary::before {
  content: "▸";
  font-size: 1.25rem;
  color: var(--color-accent);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

summary:hover {
  background: rgba(42, 47, 107, 0.04);
  color: var(--color-accent);
}

summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  box-shadow: inset 0 0 0 3px rgba(242, 106, 75, 0.15);
}

details .details-content {
  padding: 0 1.5rem 1.5rem 3rem;
  color: var(--color-text);
  line-height: 1.7;
}

aside {
  margin: 2rem 0;
  padding: 1.5rem;
  background: rgba(242, 106, 75, 0.06);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

aside h3, aside h4 {
  margin-top: 0;
  color: var(--color-accent);
}

footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: auto;
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

@media (min-width: 768px) {
  main {
    padding: 3.5rem 2rem;
  }

  section {
    padding: 2.5rem;
  }

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

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

  details .details-content {
    padding-left: 3.25rem;
  }
}

@media (min-width: 1024px) {
  main {
    padding: 4rem 2.5rem;
  }

  section {
    padding: 3rem;
  }

  header .header-inner {
    padding: 1.5rem 2.5rem;
  }
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(242, 106, 75, 0.15);
}

@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: white;
    color: black;
  }

  header, footer, nav, .breadcrumbs {
    display: none;
  }

  main {
    max-width: 100%;
    padding: 0;
  }

  section {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }

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

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.875rem;
  }

  details {
    border: 1px solid #ccc;
  }

  details summary::before {
    content: "";
  }

  details .details-content {
    display: block;
  }

  table {
    border: 1px solid #000;
  }

  th, td {
    border: 1px solid #000;
  }
}