* {
  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: 'Trebuchet MS', 'Lucida Sans', 'Lucida Grande', sans-serif;
  --max-width: 1100px;
  --radius: 0;
  --spacing-unit: 1rem;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  font-weight: 400;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  color: var(--color-secondary);
}

h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 2.25rem;
  margin-top: 2rem;
  position: relative;
  padding-left: 1.5rem;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0.5rem;
  height: 100%;
  background: var(--color-primary);
  clip-path: polygon(0 0, 100% 10%, 100% 90%, 0 100%);
}

h3 {
  font-size: 1.75rem;
  margin-top: 1.5rem;
}

h4 {
  font-size: 1.5rem;
  margin-top: 1.25rem;
}

h5 {
  font-size: 1.25rem;
  margin-top: 1rem;
}

h6 {
  font-size: 1rem;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

p {
  margin-bottom: 1rem;
  max-width: 75ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, 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: 4px;
}

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

em {
  font-style: italic;
}

blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  background: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 1rem), calc(100% - 1rem) 100%, 0 100%);
}

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

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

.site-header {
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: 0;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2rem), 0 100%);
}

.site-header .container {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.site-header h1 {
  color: var(--color-bg);
  margin: 0;
  font-size: 2.5rem;
}

.site-nav {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 calc(100% - 0.5rem));
}

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

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: block;
  padding: 1rem 1.5rem;
  color: var(--color-bg);
  border-bottom: none;
  background: var(--color-primary);
  transition: background-color 0.2s ease, color 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 0.5rem) 0, 100% 100%, 0.5rem 100%);
  margin-right: 0.25rem;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

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

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

.site-main {
  min-height: 60vh;
  padding: 3rem 0;
}

.site-footer {
  background: var(--color-surface);
  padding: 3rem 0 2rem;
  margin-top: 4rem;
  border-top: 4px solid var(--color-primary);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -2rem;
  left: 0;
  right: 0;
  height: 2rem;
  background: linear-gradient(135deg, transparent 0, transparent 49%, var(--color-surface) 50%, var(--color-surface) 100%);
  background-size: 4rem 4rem;
}

.site-footer p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.breadcrumbs {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 2rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  border-bottom: 1px solid transparent;
}

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

.breadcrumbs::after {
  content: '/';
  margin: 0 0.25rem;
}

.breadcrumbs :last-child::after {
  display: none;
}

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

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

table th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--color-secondary);
}

table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

table tbody tr {
  transition: background-color 0.2s ease;
}

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

table tbody tr:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

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

details {
  margin: 1.5rem 0;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  clip-path: polygon(0 0, calc(100% - 1rem) 0, 100% 1rem, 100% 100%, 0 100%);
}

summary {
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-weight: 700;
  color: var(--color-secondary);
  background: var(--color-surface);
  user-select: none;
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  position: relative;
}

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

summary::after {
  content: '';
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transition: transform 0.2s ease;
}

details[open] summary::after {
  transform: translateY(-50%) rotate(225deg);
}

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

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

details[open] summary {
  border-bottom: 2px solid var(--color-border);
}

details > *:not(summary) {
  padding: 1.5rem;
}

.card {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  padding: 2rem;
  margin: 1.5rem 0;
  position: relative;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 1.5rem) 0, 100% 1.5rem, 100% 100%, 1.5rem 100%, 0 calc(100% - 1.5rem));
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--color-accent);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
}

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

.card h3 {
  margin-top: 0;
}

input[type="text"],
input[type="email"],
input[type="search"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-main);
  font-size: 1rem;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 0.5rem) 0, 100% 0.5rem, 100% 100%, 0 100%);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 4px 4px 0 var(--color-surface);
}

button,
input[type="submit"],
input[type="button"] {
  padding: 0.75rem 2rem;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-bg);
  background: var(--color-primary);
  border: none;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
  clip-path: polygon(0 0, calc(100% - 0.75rem) 0, 100% 0.75rem, 100% 100%, 0.75rem 100%, 0 calc(100% - 0.75rem));
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background: var(--color-secondary);
  box-shadow: 4px 4px 0 var(--color-accent);
}

button:focus-visible,
input[type="submit"]:focus-visible,
input[type="button"]:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

ul, ol {
  margin: 1rem 0 1rem 2rem;
}

li {
  margin-bottom: 0.5rem;
}

hr {
  border: none;
  height: 4px;
  background: var(--color-border);
  margin: 3rem 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 2rem 100%, 0 calc(100% - 2rem));
}

code {
  font-family: 'Courier New', monospace;
  background: var(--color-surface);
  padding: 0.125rem 0.375rem;
  font-size: 0.9em;
  color: var(--color-secondary);
  border: 1px solid var(--color-border);
}

pre {
  background: var(--color-surface);
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  border-left: 4px solid var(--color-primary);
}

pre code {
  background: none;
  border: none;
  padding: 0;
}

@media (max-width: 767px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
    padding-left: 1rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .site-nav ul {
    flex-direction: column;
  }

  .site-nav a {
    clip-path: none;
    margin-right: 0;
    border-bottom: 1px solid var(--color-secondary);
  }

  .container {
    padding: 0 1rem;
  }

  table {
    font-size: 0.875rem;
  }

  table th,
  table td {
    padding: 0.5rem;
  }

  .card {
    padding: 1.5rem;
  }
}

@media (min-width: 768px) {
  body {
    font-size: 17px;
  }

  .site-header .container {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 2rem;
  }

  .site-main {
    padding: 4rem 0;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 18px;
  }

  h1 {
    font-size: 3.5rem;
  }

  .container {
    padding: 0 2rem;
  }

  .site-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
}

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

@media print {
  .site-nav,
  .breadcrumbs,
  button,
  input[type="submit"],
  input[type="button"] {
    display: none;
  }

  .site-header {
    clip-path: none;
    padding-bottom: 1rem;
  }

  .site-main {
    max-width: 100%;
    padding: 1rem 0;
  }

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

  a {
    text-decoration: underline;
  }

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

  table {
    page-break-inside: avoid;
  }
}