* {
  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);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h2 {
  font-size: 2.25rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  position: relative;
  padding-bottom: var(--spacing-sm);
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0% 100%);
}

h3 {
  font-size: 1.75rem;
  margin-top: var(--spacing-md);
}

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

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

h6 {
  font-size: 1.125rem;
  margin-top: var(--spacing-sm);
}

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

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

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

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: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background: var(--color-surface);
  border-left: 6px solid var(--color-primary);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%);
}

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

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

.site-header {
  background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
  color: var(--color-bg);
  padding: var(--spacing-md) 0;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
  margin-bottom: var(--spacing-lg);
}

.site-header::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: rgba(255, 255, 255, 0.03);
  clip-path: polygon(30% 0, 100% 0, 70% 100%, 0% 100%);
  pointer-events: none;
}

.site-header .container {
  position: relative;
  z-index: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

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

.site-nav a {
  color: var(--color-bg);
  font-weight: 700;
  padding: var(--spacing-xs) var(--spacing-sm);
  display: block;
  position: relative;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.2s ease;
}

.site-nav a:hover::before {
  width: 100%;
}

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

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

.site-footer {
  background-color: var(--color-secondary);
  color: var(--color-surface);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
  position: relative;
  clip-path: polygon(0 40px, 100% 0, 100% 100%, 0 100%);
}

.site-footer::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-primary) 100%);
}

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

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

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

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

.breadcrumbs a {
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

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

.breadcrumbs span {
  user-select: none;
}

.card {
  background-color: 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%, 0 100%);
}

.card::before {
  content: '';
  position: absolute;
  top: -2px;
  right: -2px;
  width: 40px;
  height: 40px;
  background-color: var(--color-surface);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  transition: background-color 0.2s ease;
}

.card:hover {
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.12);
  border-color: var(--color-primary);
}

.card:hover::before {
  background-color: var(--color-primary);
}

.card h3 {
  margin-top: 0;
}

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

table thead {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
}

table th,
table td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

table th {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  position: relative;
}

table th::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent) 50%, transparent 100%);
}

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

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

table tbody tr:hover {
  background-color: rgba(148, 163, 184, 0.15);
}

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

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

details::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
  transition: width 0.2s ease;
}

details[open]::before {
  width: 8px;
}

summary {
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 700;
  cursor: pointer;
  user-select: none;
  list-style: none;
  position: relative;
  transition: background-color 0.2s ease, color 0.2s ease;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

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

summary::after {
  content: '▼';
  position: absolute;
  right: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%) rotate(-90deg);
  transition: transform 0.2s ease;
  font-size: 0.75rem;
  color: var(--color-primary);
}

details[open] summary::after {
  transform: translateY(-50%) rotate(0deg);
}

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

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

details > *:not(summary) {
  padding: var(--spacing-md);
  animation: fadeIn 0.2s ease;
}

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

ul,
ol {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-xs);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button,
input,
textarea,
select {
  font-family: var(--font-main);
  font-size: 1rem;
}

button {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-bg);
  border: none;
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-weight: 700;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

button:hover {
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.3);
  transform: translateY(-2px);
}

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

button:active {
  transform: translateY(0);
}

input,
textarea,
select {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 2px solid var(--color-border);
  background-color: var(--color-bg);
  color: var(--color-text);
  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(51, 65, 85, 0.1);
}

hr {
  border: none;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, var(--color-border) 20%, var(--color-border) 80%, transparent 100%);
  margin: var(--spacing-lg) 0;
  position: relative;
}

hr::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  background-color: var(--color-bg);
  border: 3px solid var(--color-border);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

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

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .site-nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav ul {
    flex-direction: column;
    width: 100%;
    gap: var(--spacing-xs);
  }

  table {
    font-size: 0.875rem;
  }

  table th,
  table td {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

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

  .site-nav {
    flex-direction: row;
  }

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

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

@media (min-width: 1024px) {
  body {
    font-size: 1.125rem;
  }

  h1 {
    font-size: 4rem;
  }

  h2 {
    font-size: 2.5rem;
  }

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

  .site-main {
    display: grid;
    gap: var(--spacing-lg);
  }
}

@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,
  .breadcrumbs {
    display: none;
  }

  .site-main {
    min-height: auto;
  }

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

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

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

  table {
    break-inside: avoid;
  }
}