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

: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: 'Trebuchet MS', 'Lucida Sans', 'Lucida Grande', sans-serif;
  --max-width: 1100px;
  --radius: 0;
  --spacing-unit: 1rem;
  --transition-speed: 0.2s;
}

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: calc(var(--spacing-unit) * 0.75);
  color: var(--color-secondary);
}

h1 {
  font-size: 2.5rem;
  text-transform: uppercase;
  letter-spacing: -0.03em;
  position: relative;
  padding-bottom: calc(var(--spacing-unit) * 0.5);
}

h1::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--color-primary);
  clip-path: polygon(0 0, 100% 0, 85% 100%, 0% 100%);
}

h2 {
  font-size: 2rem;
  border-left: 5px solid var(--color-primary);
  padding-left: calc(var(--spacing-unit) * 0.75);
  margin-top: calc(var(--spacing-unit) * 2);
}

h3 {
  font-size: 1.5rem;
  position: relative;
  padding-left: calc(var(--spacing-unit) * 1.5);
}

h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 0;
  border-left: 12px solid var(--color-accent);
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
}

h4 {
  font-size: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h5 {
  font-size: 1.125rem;
  color: var(--color-primary);
}

h6 {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-unit);
  max-width: 75ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  position: relative;
  transition: color var(--transition-speed) ease;
}

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

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

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

em {
  font-style: italic;
  color: var(--color-text);
}

blockquote {
  margin: calc(var(--spacing-unit) * 1.5) 0;
  padding: calc(var(--spacing-unit) * 1.25);
  background: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  position: relative;
  font-style: italic;
  color: var(--color-text-muted);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  position: absolute;
  top: -10px;
  left: 10px;
  color: var(--color-accent);
  opacity: 0.3;
  font-family: Georgia, serif;
}

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

.site-header {
  background: var(--color-secondary);
  color: var(--color-bg);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
  padding-bottom: 40px;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30px;
  background: linear-gradient(135deg, var(--color-primary) 50%, transparent 50%);
}

.site-nav {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.1);
}

.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
}

.site-nav li {
  flex: 1 1 auto;
  min-width: 120px;
  position: relative;
}

.site-nav li::after {
  content: '';
  position: absolute;
  right: 0;
  top: 25%;
  width: 1px;
  height: 50%;
  background: var(--color-secondary);
  transform: skewX(-15deg);
}

.site-nav li:last-child::after {
  display: none;
}

.site-nav a {
  display: block;
  padding: calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
  color: var(--color-bg);
  text-align: center;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  background: var(--color-primary);
}

.site-nav a:hover {
  background-color: var(--color-accent);
  color: var(--color-secondary);
}

.site-main {
  flex: 1;
  padding: calc(var(--spacing-unit) * 2) 0;
}

.site-footer {
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: calc(var(--spacing-unit) * 3) 0 calc(var(--spacing-unit) * 2);
  margin-top: calc(var(--spacing-unit) * 4);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -30px;
  left: 0;
  right: 0;
  height: 30px;
  background: linear-gradient(-135deg, var(--color-secondary) 50%, transparent 50%);
}

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

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

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--spacing-unit) * 0.5);
  align-items: center;
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  padding: calc(var(--spacing-unit) * 0.75);
  background: var(--color-surface);
  font-size: 0.875rem;
  clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 50%, calc(100% - 15px) 100%, 0 100%);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  transition: color var(--transition-speed) ease;
}

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

.breadcrumbs span {
  color: var(--color-text-muted);
}

.breadcrumbs span::before {
  content: '▸';
  margin-right: calc(var(--spacing-unit) * 0.5);
  color: var(--color-accent);
}

.breadcrumbs span:first-child::before {
  display: none;
}

.card {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  padding: calc(var(--spacing-unit) * 1.5);
  margin-bottom: calc(var(--spacing-unit) * 1.5);
  transition: box-shadow var(--transition-speed) ease, border-color var(--transition-speed) ease;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 0;
  border-top: 20px solid var(--color-primary);
  border-right: 20px solid transparent;
  transition: border-top-color var(--transition-speed) ease;
}

.card:hover {
  box-shadow: 8px 8px 0 var(--color-surface);
  border-color: var(--color-primary);
}

.card:hover::before {
  border-top-color: var(--color-accent);
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: calc(var(--spacing-unit) * 1.5) 0;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  overflow: hidden;
}

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

table th {
  padding: calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.875rem;
  border-right: 1px solid var(--color-secondary);
}

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

table td {
  padding: calc(var(--spacing-unit) * 0.75) var(--spacing-unit);
  border-bottom: 1px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  transition: background-color var(--transition-speed) ease;
}

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

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

table tbody tr:hover {
  background: #e2e8f0;
}

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

details {
  margin: calc(var(--spacing-unit) * 1.5) 0;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  position: relative;
}

details::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 25px solid var(--color-accent);
  border-left: 25px solid transparent;
  transition: border-top-color var(--transition-speed) ease;
}

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

summary {
  padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 1.25);
  cursor: pointer;
  font-weight: 700;
  background: var(--color-surface);
  color: var(--color-secondary);
  user-select: none;
  list-style: none;
  position: relative;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

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

summary::before {
  content: '▸';
  display: inline-block;
  margin-right: calc(var(--spacing-unit) * 0.5);
  transition: transform var(--transition-speed) ease;
  color: var(--color-primary);
  font-size: 1.2em;
}

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

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

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

details > *:not(summary) {
  padding: calc(var(--spacing-unit) * 1.25);
  animation: slideDown var(--transition-speed) ease;
}

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

@media (min-width: 768px) {
  h1 {
    font-size: 3.5rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  h3 {
    font-size: 1.875rem;
  }

  .site-header {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 50px), 0 100%);
    padding-bottom: 60px;
  }

  .site-header::after {
    height: 50px;
  }

  .site-nav ul {
    flex-wrap: nowrap;
  }

  .site-nav a {
    font-size: 1rem;
  }

  .site-main {
    padding: calc(var(--spacing-unit) * 3) 0;
  }

  .container {
    padding: 0 calc(var(--spacing-unit) * 2);
  }

  .card {
    padding: calc(var(--spacing-unit) * 2);
  }

  table th,
  table td {
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.25);
  }
}

@media (min-width: 1024px) {
  :root {
    --spacing-unit: 1.25rem;
  }

  h1 {
    font-size: 4rem;
  }

  h2 {
    font-size: 3rem;
  }

  h3 {
    font-size: 2.25rem;
  }

  .site-header {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 70px), 0 100%);
    padding-bottom: 80px;
  }

  .site-header::after {
    height: 70px;
  }

  .site-nav a {
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 1.5);
  }

  .card:hover {
    box-shadow: 12px 12px 0 var(--color-surface);
  }
}

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

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

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

  .site-header,
  .site-footer {
    clip-path: none;
  }

  .site-header::after,
  .site-footer::before {
    display: none;
  }

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

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

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

  details[open] summary {
    display: none;
  }

  details > *:not(summary) {
    padding: 0;
  }
}