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

:root {
  --color-primary: #334155;
  --color-secondary: #0f172a;
  --color-accent: #94a3b8;
  --color-bg: #ffffff;
  --color-surface: #f1f5f9;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #cbd5e1;
  --font-main: 'Georgia', 'Times New Roman', 'Palatino', serif;
  --max-width: 1100px;
  --radius: 0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-secondary);
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  position: relative;
  padding-bottom: var(--spacing-sm);
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 4px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0% 100%);
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-lg);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-md);
}

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

h5 {
  font-size: 1.1rem;
  margin-top: var(--spacing-sm);
}

h6 {
  font-size: 1rem;
  margin-top: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
  position: relative;
}

a:hover {
  color: var(--color-secondary);
  border-bottom-color: var(--color-accent);
}

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

strong {
  font-weight: 700;
  color: var(--color-secondary);
}

em {
  font-style: italic;
}

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%);
}

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

::selection {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.site-header {
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--spacing-md) var(--spacing-sm);
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -30px;
  left: 0;
  width: 100%;
  height: 30px;
  background: var(--color-secondary);
  clip-path: polygon(0 0, 100% 0, 100% 0, 0 100%);
  z-index: 1;
}

.site-header .container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  align-items: flex-start;
}

.site-header h1 {
  color: var(--color-bg);
  font-size: 1.8rem;
  margin: 0;
  padding: 0;
}

.site-header h1::after {
  display: none;
}

.site-nav {
  width: 100%;
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.site-nav a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-bg);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 2px solid transparent;
  clip-path: polygon(5px 0, 100% 0, calc(100% - 5px) 100%, 0 100%);
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  color: var(--color-bg);
}

.site-nav a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.site-main {
  flex: 1;
  padding: calc(var(--spacing-xl) + 30px) var(--spacing-sm) var(--spacing-xl);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.breadcrumbs {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background: var(--color-surface);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.breadcrumbs ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  align-items: center;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.breadcrumbs li:not(:last-child)::after {
  content: '›';
  color: var(--color-text-muted);
  font-size: 1.2rem;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

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

.breadcrumbs li:last-child a {
  color: var(--color-text);
  font-weight: 700;
  pointer-events: none;
}

.card {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  box-shadow: 0 4px 16px rgba(51, 65, 85, 0.15);
  border-color: var(--color-primary);
}

.card h2,
.card h3,
.card h4 {
  margin-top: 0;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 60px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), 50% 100%, 0 calc(100% - 8px));
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--spacing-md) 0;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
}

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

table th {
  padding: var(--spacing-sm);
  text-align: left;
  font-weight: 700;
  border-right: 2px solid rgba(255, 255, 255, 0.1);
}

table th:last-child {
  border-right: none;
}

table td {
  padding: var(--spacing-sm);
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

table td:last-child {
  border-right: none;
}

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

table tbody tr:hover {
  background: rgba(148, 163, 184, 0.1);
}

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

details {
  margin: var(--spacing-md) 0;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
  transition: border-color 0.2s ease;
}

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

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-surface);
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
  position: relative;
}

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

summary::before {
  content: '▶';
  display: inline-block;
  font-size: 0.8rem;
  transition: transform 0.2s ease;
  color: var(--color-primary);
}

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

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

summary:hover::before {
  color: var(--color-bg);
}

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

details > *:not(summary) {
  padding: var(--spacing-md);
  animation: slideDown 0.2s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.site-footer {
  background: var(--color-surface);
  color: var(--color-text);
  padding: var(--spacing-lg) var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-xl);
  border-top: 4px solid var(--color-primary);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -34px;
  left: 0;
  width: 100%;
  height: 30px;
  background: var(--color-surface);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.site-footer .container {
  display: grid;
  gap: var(--spacing-md);
}

.site-footer a {
  color: var(--color-primary);
}

.site-footer a:hover {
  color: var(--color-secondary);
}

.site-footer p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.75rem;
  }

  .site-header .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .site-header h1 {
    font-size: 2.25rem;
  }

  .site-nav {
    width: auto;
  }

  .site-nav ul {
    gap: var(--spacing-sm);
  }

  .site-main {
    padding: calc(var(--spacing-xl) + 30px) var(--spacing-md) var(--spacing-xl);
  }

  .site-footer .container {
    grid-template-columns: repeat(2, 1fr);
  }

  .card {
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
  }
}

@media (min-width: 1024px) {
  h1 {
    font-size: 3.5rem;
  }

  .site-header h1 {
    font-size: 2.5rem;
  }

  .site-main {
    padding: calc(var(--spacing-xl) + 30px) var(--spacing-lg) var(--spacing-xl);
  }

  .site-footer .container {
    grid-template-columns: repeat(3, 1fr);
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  table {
    font-size: 1rem;
  }

  details {
    clip-path: polygon(15px 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%, 0 15px);
  }

  blockquote {
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  }

  .breadcrumbs {
    clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 0 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    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;
  }

  details > *:not(summary) {
    animation: none;
  }
}

@media print {
  .site-header,
  .site-nav,
  .site-footer,
  .breadcrumbs {
    display: none;
  }

  .site-main {
    padding: 0;
  }

  .container {
    max-width: 100%;
    padding: 0;
  }

  a {
    color: var(--color-text);
    border-bottom: none;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8rem;
    color: var(--color-text-muted);
  }

  .card {
    border: 1px solid var(--color-border);
    box-shadow: none;
    page-break-inside: avoid;
  }

  details {
    border: 1px solid var(--color-border);
  }

  summary {
    background: transparent;
  }

  details[open] summary ~ * {
    display: block;
  }

  table {
    page-break-inside: avoid;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }
}