* {
  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: 'Courier New', 'Lucida Console', Monaco, monospace;
  --max-width: 1100px;
  --radius: 0;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

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;
  overflow-x: hidden;
}

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

h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

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

h2 {
  font-size: 2.25rem;
  margin-top: var(--spacing-lg);
  position: relative;
  display: inline-block;
}

h2::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -8px;
  right: -8px;
  bottom: -8px;
  background: var(--color-surface);
  z-index: -1;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

h3 {
  font-size: 1.75rem;
  margin-top: var(--spacing-md);
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-sm);
}

h4 {
  font-size: 1.5rem;
  margin-top: var(--spacing-md);
}

h5 {
  font-size: 1.25rem;
  margin-top: var(--spacing-sm);
  color: var(--color-primary);
}

h6 {
  font-size: 1rem;
  margin-top: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

p {
  margin-bottom: var(--spacing-sm);
  max-width: 70ch;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  position: relative;
  transition: color 0.2s ease;
  font-weight: 500;
}

a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.2s ease;
}

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

a:hover::after {
  width: 100%;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
}

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

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

blockquote {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  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, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  position: absolute;
  top: -10px;
  left: 10px;
  color: var(--color-accent);
  opacity: 0.3;
  line-height: 1;
}

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

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

.site-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(135deg, var(--color-primary) 50%, transparent 50%);
  pointer-events: none;
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.site-header h1 {
  color: var(--color-bg);
  font-size: 2rem;
  margin: 0;
  padding: 0;
}

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

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

.site-nav a {
  color: var(--color-bg);
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  padding: var(--spacing-xs) var(--spacing-sm);
  display: block;
  transition: background-color 0.2s ease, color 0.2s ease;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.site-nav a::after {
  display: none;
}

.site-nav a:hover {
  background: var(--color-primary);
  color: var(--color-bg);
}

.site-main {
  min-height: 60vh;
  padding: var(--spacing-xl) 0;
}

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

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

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

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

.breadcrumbs::before {
  content: '';
  width: 20px;
  height: 20px;
  background: var(--color-surface);
  clip-path: polygon(30% 0, 70% 0, 100% 50%, 70% 100%, 30% 100%, 0 50%);
  margin-right: var(--spacing-xs);
}

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

.card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 20px 20px 0;
  border-color: transparent var(--color-surface) transparent transparent;
}

.card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
}

.card h3 {
  margin-top: 0;
  border: none;
  padding: 0;
}

.card h3::before {
  content: '▶';
  color: var(--color-primary);
  margin-right: var(--spacing-xs);
  font-size: 0.7em;
}

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

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

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

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

tbody tr {
  background: var(--color-bg);
  transition: background-color 0.2s ease;
}

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

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

tbody tr:hover td {
  border-color: var(--color-primary);
}

details {
  margin: var(--spacing-md) 0;
  border: 2px solid var(--color-border);
  background: var(--color-bg);
  transition: border-color 0.2s ease;
}

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

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-weight: 700;
  background: var(--color-surface);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

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

summary::before {
  content: '▸';
  margin-right: var(--spacing-sm);
  display: inline-block;
  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: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);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
  position: relative;
  clip-path: polygon(0 30px, 100% 0, 100% 100%, 0 100%);
  padding-top: calc(var(--spacing-lg) + 30px);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(-135deg, var(--color-primary) 50%, transparent 50%);
  pointer-events: none;
}

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

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

button,
input[type="submit"],
input[type="button"] {
  font-family: var(--font-main);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-primary);
  color: var(--color-bg);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background: var(--color-secondary);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.2);
}

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

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

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(51, 65, 85, 0.1);
}

ul:not(.site-nav ul) {
  list-style: none;
  padding-left: var(--spacing-md);
}

ul:not(.site-nav ul) li {
  position: relative;
  margin-bottom: var(--spacing-xs);
  padding-left: var(--spacing-md);
}

ul:not(.site-nav ul) li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

ol {
  padding-left: var(--spacing-md);
  counter-reset: item;
}

ol li {
  margin-bottom: var(--spacing-xs);
  padding-left: var(--spacing-sm);
  counter-increment: item;
}

code {
  font-family: var(--font-main);
  background: var(--color-surface);
  padding: 2px 6px;
  border: 1px solid var(--color-border);
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background: var(--color-secondary);
  color: var(--color-bg);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border-left: 4px solid var(--color-primary);
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-bg);
}

hr {
  border: none;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
  margin: var(--spacing-lg) 0;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 100%, 20px 100%);
}

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

  h2 {
    font-size: 2.5rem;
  }

  .site-header {
    padding: var(--spacing-lg) 0;
    padding-bottom: calc(var(--spacing-lg) + 30px);
  }

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

  .card {
    padding: var(--spacing-lg);
  }

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

@media (min-width: 1024px) {
  h1 {
    font-size: 4rem;
  }

  .site-main {
    padding: calc(var(--spacing-xl) * 1.5) 0;
  }

  table {
    font-size: 1rem;
  }
}

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

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

  .site-main {
    padding: 0;
  }

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

  a::after {
    content: " (" attr(href) ")";
  }

  * {
    box-shadow: none !important;
  }
}