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

:root {
  --color-primary: #475569;
  --color-secondary: #1e293b;
  --color-accent: #38bdf8;
  --color-bg: #ffffff;
  --color-surface: #f8fafc;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --font-main: 'Trebuchet MS', 'Lucida Sans', 'Lucida Grande', sans-serif;
  --max-width: 1100px;
  --radius: 0px;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  background-image: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 100%);
  min-height: 100vh;
}

h1 {
  font-size: 3rem;
  line-height: 1.1;
  font-weight: 900;
  color: var(--color-secondary);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  border: 6px solid var(--color-secondary);
  padding: 1.5rem;
  background: var(--color-surface);
  box-shadow: 8px 8px 0 var(--color-accent);
}

h2 {
  font-size: 2.25rem;
  line-height: 1.2;
  font-weight: 800;
  color: var(--color-secondary);
  margin-bottom: 1.25rem;
  margin-top: 2.5rem;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  border-left: 8px solid var(--color-accent);
  padding-left: 1rem;
  background: linear-gradient(90deg, var(--color-surface) 0%, transparent 100%);
}

h3 {
  font-size: 1.75rem;
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
  margin-top: 2rem;
  border-bottom: 4px solid var(--color-border);
  padding-bottom: 0.5rem;
}

h4 {
  font-size: 1.5rem;
  line-height: 1.4;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.875rem;
  margin-top: 1.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h5 {
  font-size: 1.25rem;
  line-height: 1.5;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  margin-top: 1.5rem;
}

h6 {
  font-size: 1.125rem;
  line-height: 1.5;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: 0.625rem;
  margin-top: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

p {
  margin-bottom: 1.25rem;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 700;
  border-bottom: 3px solid var(--color-accent);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

a:hover {
  color: var(--color-secondary);
  background-color: var(--color-accent);
  border-bottom-color: var(--color-secondary);
  box-shadow: inset 0 -3px 0 var(--color-secondary);
}

a:focus-visible {
  outline: 4px solid var(--color-accent);
  outline-offset: 4px;
  background-color: var(--color-surface);
}

strong {
  font-weight: 800;
  color: var(--color-secondary);
}

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

blockquote {
  margin: 2rem 0;
  padding: 1.5rem 2rem;
  border-left: 8px solid var(--color-accent);
  background: var(--color-surface);
  background-image: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg) 100%);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-primary);
  box-shadow: inset 4px 4px 8px rgba(0, 0, 0, 0.05);
  border: 3px solid var(--color-border);
  border-left: 8px solid var(--color-accent);
}

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

.site-header {
  background: var(--color-secondary);
  background-image: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  border-bottom: 6px solid var(--color-accent);
  padding: 2rem 0;
  box-shadow: 0 8px 0 rgba(56, 189, 248, 0.3);
  position: relative;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--color-accent);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.4);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
}

.site-nav a {
  color: var(--color-bg);
  border: 3px solid var(--color-bg);
  padding: 0.75rem 1.5rem;
  background: transparent;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.95rem;
  border-bottom: 3px solid var(--color-bg);
  transition: all 0.2s ease;
  display: inline-block;
}

.site-nav a:hover {
  background: var(--color-accent);
  color: var(--color-secondary);
  border-color: var(--color-accent);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.2);
  transform: translate(-2px, -2px);
}

.site-nav a:focus-visible {
  outline: 4px solid var(--color-accent);
  outline-offset: 4px;
}

.site-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: 3rem 0;
  min-height: 60vh;
}

.site-footer {
  background: var(--color-secondary);
  color: var(--color-surface);
  border-top: 6px solid var(--color-accent);
  padding: 2.5rem 0 2rem;
  margin-top: 4rem;
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.2);
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.875rem;
  margin-bottom: 2rem;
  padding: 1rem 1.5rem;
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.05);
}

.breadcrumbs a {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  font-weight: 600;
  padding: 0.25rem 0.5rem;
}

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

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  border: 4px solid var(--color-secondary);
  background: var(--color-bg);
  box-shadow: 6px 6px 0 var(--color-border);
}

table thead {
  background: var(--color-secondary);
  background-image: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
}

table th {
  padding: 1rem 1.25rem;
  text-align: left;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 4px solid var(--color-accent);
  font-size: 0.95rem;
}

table td {
  padding: 1rem 1.25rem;
  border-bottom: 2px solid var(--color-border);
}

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

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

table tbody tr:hover {
  background: var(--color-accent);
  color: var(--color-secondary);
  box-shadow: inset 0 0 0 2px var(--color-secondary);
}

table tbody tr:hover td {
  border-bottom-color: var(--color-secondary);
}

details {
  margin: 1.5rem 0;
  border: 4px solid var(--color-secondary);
  background: var(--color-surface);
  box-shadow: 6px 6px 0 var(--color-border);
}

summary {
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--color-secondary);
  background: var(--color-bg);
  background-image: linear-gradient(90deg, var(--color-surface) 0%, var(--color-bg) 100%);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  user-select: none;
  border-bottom: 3px solid var(--color-border);
}

summary:hover {
  background: var(--color-accent);
  color: var(--color-secondary);
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.1);
}

summary:focus-visible {
  outline: 4px solid var(--color-accent);
  outline-offset: 4px;
}

details[open] summary {
  background: var(--color-secondary);
  color: var(--color-bg);
  border-bottom-color: var(--color-accent);
}

details > *:not(summary) {
  padding: 1.5rem;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  background: var(--color-surface);
  background-image: linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface) 100%);
  border: 5px solid var(--color-secondary);
  padding: 2rem;
  margin: 1.5rem 0;
  box-shadow: 8px 8px 0 var(--color-accent), inset 3px 3px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translate(-4px, -4px);
  box-shadow: 12px 12px 0 var(--color-accent), inset 3px 3px 6px rgba(0, 0, 0, 0.08);
}

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

input[type="text"],
input[type="email"],
input[type="search"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: 0.875rem 1.25rem;
  border: 4px solid var(--color-secondary);
  background: var(--color-bg);
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  box-shadow: inset 3px 3px 6px rgba(0, 0, 0, 0.08);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
  box-shadow: inset 3px 3px 6px rgba(0, 0, 0, 0.08), 0 0 0 4px var(--color-accent);
}

button,
input[type="submit"],
input[type="button"] {
  padding: 0.875rem 2rem;
  background: var(--color-accent);
  color: var(--color-secondary);
  border: 4px solid var(--color-secondary);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 4px 4px 0 var(--color-secondary);
}

button:hover,
input[type="submit"]:hover,
input[type="button"]:hover {
  background: var(--color-secondary);
  color: var(--color-accent);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--color-accent);
}

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

button:active,
input[type="submit"]:active,
input[type="button"]:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--color-secondary);
}

ul,
ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

ul li::marker {
  color: var(--color-accent);
  font-weight: 800;
}

ol li::marker {
  color: var(--color-accent);
  font-weight: 800;
}

hr {
  border: none;
  border-top: 5px solid var(--color-secondary);
  margin: 3rem 0;
  box-shadow: 0 3px 0 var(--color-accent);
}

code {
  background: var(--color-surface);
  padding: 0.25rem 0.5rem;
  border: 2px solid var(--color-border);
  font-family: 'Courier New', monospace;
  font-size: 0.9em;
  color: var(--color-secondary);
  box-shadow: inset 2px 2px 4px rgba(0, 0, 0, 0.05);
}

pre {
  background: var(--color-surface);
  padding: 1.5rem;
  border: 4px solid var(--color-secondary);
  overflow-x: auto;
  margin: 1.5rem 0;
  box-shadow: 6px 6px 0 var(--color-border), inset 3px 3px 6px rgba(0, 0, 0, 0.05);
}

pre code {
  background: none;
  padding: 0;
  border: none;
  box-shadow: none;
}

@media (min-width: 768px) {
  h1 {
    font-size: 3.75rem;
    padding: 2rem;
    box-shadow: 12px 12px 0 var(--color-accent);
  }

  h2 {
    font-size: 2.75rem;
    border-left-width: 12px;
    padding-left: 1.5rem;
  }

  h3 {
    font-size: 2rem;
    border-bottom-width: 5px;
  }

  .site-nav {
    gap: 1rem;
  }

  .site-nav a {
    padding: 1rem 2rem;
  }

  .site-main {
    grid-template-columns: 1fr;
    gap: 3rem;
    padding: 4rem 0;
  }

  .card {
    padding: 2.5rem;
  }

  table th,
  table td {
    padding: 1.25rem 1.5rem;
  }
}

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

  h1 {
    font-size: 4.5rem;
    padding: 2.5rem;
    margin-bottom: 2rem;
  }

  h2 {
    font-size: 3rem;
  }

  .site-header {
    padding: 2.5rem 0;
  }

  .site-main {
    padding: 5rem 0;
  }

  .container {
    padding: 0 2rem;
  }

  .card {
    padding: 3rem;
  }
}

@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,
  .site-footer,
  .breadcrumbs,
  button {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .site-header {
    border-bottom: 2px solid black;
    box-shadow: none;
    background: white;
  }

  .site-main {
    padding: 1rem 0;
  }

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

  .card,
  table,
  details,
  blockquote {
    box-shadow: none;
    page-break-inside: avoid;
  }

  a {
    color: black;
    text-decoration: underline;
  }

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