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

:root {
  --color-primary: #dc2626;
  --color-secondary: #991b1b;
  --color-accent: #fca5a5;
  --color-bg: #ffffff;
  --color-surface: #fef2f2;
  --color-text: #1c1917;
  --color-text-muted: #78716c;
  --color-border: #e7e5e4;
  --font-main: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --max-width: 1100px;
  --radius: 0px;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
}

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

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  border-bottom: 3px solid var(--color-primary);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  position: relative;
  padding-left: 1rem;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background-color: var(--color-primary);
}

h3 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
  color: var(--color-secondary);
}

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

h5 {
  font-size: 1.125rem;
  margin-top: 1rem;
}

h6 {
  font-size: 1rem;
  margin-top: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: 'Courier New', monospace;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

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

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-muted);
}

blockquote {
  margin: 1.5rem 0;
  padding: 1.25rem 1.5rem;
  background: var(--color-surface);
  border-left: 4px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-muted);
  backdrop-filter: blur(10px);
  background: rgba(254, 242, 242, 0.8);
}

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

::selection {
  background-color: var(--color-accent);
  color: var(--color-secondary);
}

.site-header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--color-border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

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

.site-header h1 {
  margin: 0;
  border: none;
  padding: 0;
  font-size: 1.5rem;
  font-family: 'Courier New', monospace;
  letter-spacing: -0.01em;
}

.site-header h1 a {
  color: var(--color-text);
  text-decoration: none;
}

.site-header h1 a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 0;
  align-items: center;
}

.site-nav a {
  padding: 0.75rem 1.25rem;
  color: var(--color-text);
  font-weight: 500;
  border: 2px solid transparent;
  background: transparent;
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover {
  color: var(--color-primary);
  background: var(--color-surface);
  border-color: var(--color-border);
  text-decoration: none;
}

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

.site-main {
  width: 100%;
}

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

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

.breadcrumbs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  font-family: 'Courier New', monospace;
  flex-wrap: wrap;
}

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

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

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

.card {
  background: rgba(254, 242, 242, 0.6);
  backdrop-filter: blur(10px);
  border: 2px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card:hover {
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.15);
  border-color: var(--color-accent);
}

.card h2 {
  margin-top: 0;
}

.card h3 {
  margin-top: 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  font-size: 0.95rem;
}

table thead {
  background: var(--color-secondary);
  color: var(--color-bg);
  font-weight: 600;
}

table th {
  padding: 1rem;
  text-align: left;
  border-bottom: 2px solid var(--color-border);
  font-family: 'Courier New', monospace;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.2s ease;
}

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

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

table tbody tr:hover {
  background: rgba(252, 165, 165, 0.2);
}

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

details {
  margin: 1rem 0;
  border: 2px solid var(--color-border);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  overflow: hidden;
}

summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  background: var(--color-surface);
  transition: background-color 0.2s ease, color 0.2s ease;
  list-style: none;
  user-select: none;
  font-family: 'Courier New', monospace;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-primary);
  font-weight: 700;
  transition: transform 0.2s ease;
}

details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

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

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

details div {
  padding: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.site-footer {
  background: var(--color-text);
  color: var(--color-surface);
  padding: 2.5rem 0 1.5rem;
  margin-top: 3rem;
  border-top: 4px solid var(--color-primary);
}

.site-footer .container {
  display: grid;
  gap: 2rem;
}

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

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

.site-footer h3 {
  color: var(--color-bg);
  font-size: 1.125rem;
  margin-bottom: 1rem;
  font-family: 'Courier New', monospace;
}

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

.site-footer ul {
  list-style: none;
  padding: 0;
}

.site-footer li {
  margin-bottom: 0.5rem;
}

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

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

button,
.button {
  padding: 0.75rem 1.5rem;
  background: var(--color-primary);
  color: var(--color-bg);
  border: 2px solid var(--color-primary);
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
}

button:hover,
.button:hover {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  box-shadow: 0 4px 12px rgba(153, 27, 27, 0.3);
  text-decoration: none;
}

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

button:active,
.button:active {
  transform: translateY(1px);
}

ul {
  margin: 1rem 0 1rem 1.5rem;
}

ol {
  margin: 1rem 0 1rem 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

code {
  font-family: 'Courier New', monospace;
  background: var(--color-surface);
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--color-border);
  font-size: 0.9em;
  color: var(--color-secondary);
}

pre {
  background: var(--color-surface);
  padding: 1rem;
  border: 2px solid var(--color-border);
  overflow-x: auto;
  margin: 1rem 0;
  backdrop-filter: blur(10px);
}

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

hr {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: 2rem 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 2px solid var(--color-border);
}

figure {
  margin: 1.5rem 0;
}

figcaption {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-style: italic;
}

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

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .site-header .container {
    flex-direction: column;
    gap: 1rem;
  }

  .site-nav {
    flex-direction: column;
    width: 100%;
  }

  .site-nav a {
    width: 100%;
    text-align: center;
    border-top: 1px solid var(--color-border);
  }

  table {
    font-size: 0.85rem;
  }

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

  .container {
    padding: 0 1rem;
  }
}

@media (min-width: 768px) {
  .site-footer .container {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 1024px) {
  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 2.25rem;
  }

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

  .site-nav {
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    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 {
    max-width: 100%;
  }

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

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

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

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