:root {
  --color-primary: #1F6F78;
  --color-secondary: #2B2F3A;
  --color-accent: #D18B2C;
  --color-background: #F6F2EA;
  --color-surface: #FFFFFF;
  --color-text: #1B1E24;
  --color-text-muted: #5A6472;
  --color-border: #D7D0C4;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(43, 47, 58, 0.12);
  --maxw: 1120px;
  --transition-duration: 0.25s;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-duration: 0s;
  }
}

*, *::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: 1.75;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75em;
  color: var(--color-secondary);
}

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(1.375rem, 3vw, 1.875rem);
  margin-top: 1.25em;
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: 1.25em;
}

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

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

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

ul, ol {
  margin-bottom: 1.25em;
  padding-left: 1.75em;
}

li {
  margin-bottom: 0.5em;
}

header {
  background-color: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
  box-shadow: var(--shadow);
  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-direction: column;
  gap: 1rem;
}

.site-name {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 700;
  color: var(--color-secondary);
  text-decoration: none;
}

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

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

nav a {
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text);
  padding: 0.5rem 0;
  border-bottom: 3px solid transparent;
  transition: color var(--transition-duration) ease, border-color var(--transition-duration) ease;
}

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

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

.breadcrumbs {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  padding: 0.75rem 0;
}

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

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

.breadcrumbs span {
  margin: 0 0.5rem;
}

main {
  flex: 1;
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.page-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

article {
  background-color: var(--color-surface);
  padding: 2.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

section {
  margin-bottom: 3rem;
}

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

aside {
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: var(--radius);
  border-left: 5px solid var(--color-accent);
  box-shadow: var(--shadow);
}

aside h3, aside h4 {
  color: var(--color-accent);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

blockquote {
  background-color: rgba(209, 139, 44, 0.08);
  border-left: 6px solid var(--color-accent);
  padding: 1.75rem 2rem;
  margin: 2rem 0;
  font-size: 1.25rem;
  font-style: italic;
  line-height: 1.6;
  color: var(--color-secondary);
  border-radius: var(--radius);
}

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

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

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

table th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  position: sticky;
  top: 0;
  z-index: 10;
}

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

table tbody tr:nth-child(even) {
  background-color: rgba(31, 111, 120, 0.04);
}

table tbody tr:hover {
  background-color: rgba(31, 111, 120, 0.08);
  transition: background-color var(--transition-duration) ease;
}

.table-wrapper {
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius);
}

details {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  transition: border-color var(--transition-duration) ease;
}

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

details[open] {
  border-color: var(--color-primary);
  box-shadow: var(--shadow);
}

summary {
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-secondary);
  cursor: pointer;
  list-style: none;
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: color var(--transition-duration) ease;
}

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

summary::before {
  content: "▶";
  color: var(--color-primary);
  font-size: 0.875rem;
  transition: transform var(--transition-duration) ease;
  display: inline-block;
}

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

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

summary:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 5px;
}

details p {
  margin-top: 1rem;
  padding-left: 1.5rem;
}

.cta-section {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-surface);
  padding: 3rem 2.5rem;
  border-radius: var(--radius);
  margin: 3rem 0;
  box-shadow: var(--shadow);
}

.cta-section h2, .cta-section h3 {
  color: var(--color-surface);
}

.cta-section a {
  color: var(--color-accent);
  font-weight: 700;
  text-decoration-color: var(--color-accent);
}

.cta-section a:hover {
  color: var(--color-surface);
  text-decoration-color: var(--color-surface);
}

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

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

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

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

  .page-grid {
    grid-template-columns: 1fr 320px;
    gap: 3rem;
  }

  .page-grid.full-width {
    grid-template-columns: 1fr;
  }

  article {
    padding: 3rem;
  }

  table {
    font-size: 1.0625rem;
  }

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

@media (min-width: 1024px) {
  main {
    padding: 3.5rem 2rem;
  }

  .page-grid {
    grid-template-columns: 1fr 360px;
    gap: 4rem;
  }

  article {
    padding: 3.5rem;
  }

  aside {
    padding: 2.5rem;
  }

  section {
    margin-bottom: 4rem;
  }

  .multi-column {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }

  .multi-column-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.card {
  background-color: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: transform var(--transition-duration) ease, box-shadow var(--transition-duration) ease, border-color var(--transition-duration) ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--color-primary);
}

.card h3 {
  color: var(--color-primary);
  margin-top: 0;
}

button, .button {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border: none;
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
  font-weight: 700;
  border-radius: var(--radius);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: background-color var(--transition-duration) ease, transform var(--transition-duration) ease;
}

button:hover, .button:hover {
  background-color: var(--color-accent);
  transform: translateY(-2px);
}

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

button:active, .button:active {
  transform: translateY(0);
}

@media print {
  body {
    background-color: white;
    color: black;
    font-size: 12pt;
    line-height: 1.5;
  }

  header, footer, nav, aside, .cta-section {
    display: none;
  }

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

  article {
    box-shadow: none;
    padding: 0;
  }

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

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

  table {
    page-break-inside: avoid;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  img {
    max-width: 100%;
    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;
  }
}