:root {
  --color-primary: #7B2FF7;
  --color-secondary: #1FD1B6;
  --color-accent: #FFB020;
  --color-background: #0B0E14;
  --color-surface: #121827;
  --color-text: #E9EEF7;
  --color-text-muted: #A7B2C6;
  --color-border: #26314A;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --maxw: 1120px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  grid-template-columns: 1fr;
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition), text-decoration-color var(--transition);
  text-decoration: underline;
  text-decoration-color: transparent;
}

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

a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

header {
  background: linear-gradient(135deg, var(--color-surface) 0%, rgba(18, 24, 39, 0.95) 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

header .header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

header .site-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

header .site-name:hover {
  opacity: 0.85;
}

nav {
  width: 100%;
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
}

nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition);
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

nav a:hover {
  color: var(--color-text);
}

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

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1rem;
  width: 100%;
}

.breadcrumbs {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

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

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

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

h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-text), var(--color-text-muted));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 1.75rem;
  line-height: 1.3;
  margin-top: 3rem;
  margin-bottom: 1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.35rem;
  line-height: 1.4;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
  color: var(--color-text);
}

h4 {
  font-size: 1.15rem;
  line-height: 1.4;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--color-text);
}

p {
  margin-bottom: 1.25rem;
}

ul, ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

thead {
  background: linear-gradient(135deg, rgba(123, 47, 247, 0.15), rgba(31, 209, 182, 0.1));
  position: sticky;
  top: 0;
  z-index: 10;
}

th {
  padding: 1rem;
  text-align: left;
  font-weight: 700;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

tbody tr {
  transition: background-color var(--transition);
}

tbody tr:nth-child(even) {
  background: rgba(18, 24, 39, 0.5);
}

tbody tr:hover {
  background: rgba(123, 47, 247, 0.08);
}

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

details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: border-color var(--transition), box-shadow var(--transition);
}

details:hover {
  border-color: var(--color-primary);
  box-shadow: 0 6px 18px rgba(123, 47, 247, 0.2);
}

details[open] {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, var(--color-surface), rgba(18, 24, 39, 0.8));
}

summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: color var(--transition);
  user-select: none;
}

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

summary::before {
  content: '▶';
  color: var(--color-primary);
  font-size: 0.85rem;
  transition: transform var(--transition);
  display: inline-block;
}

details[open] summary::before {
  transform: rotate(90deg);
}

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

summary:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

details[open] summary {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

blockquote {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text-muted);
  font-style: italic;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

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

.card, .panel {
  background: var(--color-surface);
  border: 1px solid transparent;
  background-clip: padding-box;
  position: relative;
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.card::before, .panel::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2rem 1rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

footer .footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

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

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

button, .button {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 12px rgba(123, 47, 247, 0.3);
}

button:hover, .button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(123, 47, 247, 0.5);
}

button:focus-visible, .button:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

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

*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

@media (min-width: 768px) {
  header .header-inner {
    flex-direction: row;
    justify-content: space-between;
  }

  header .site-name {
    font-size: 1.75rem;
  }

  nav {
    width: auto;
  }

  nav ul {
    gap: 2rem;
  }

  h1 {
    font-size: 2.75rem;
  }

  h2 {
    font-size: 2.25rem;
  }

  h3 {
    font-size: 1.65rem;
  }

  main {
    padding: 3rem 2rem;
  }

  thead {
    position: sticky;
  }

  table {
    font-size: 1rem;
  }
}

@media (min-width: 1024px) {
  body {
    font-size: 1.0625rem;
  }

  h1 {
    font-size: 3.25rem;
  }

  h2 {
    font-size: 2.5rem;
  }

  h3 {
    font-size: 1.85rem;
  }

  main {
    padding: 4rem 2rem;
  }

  .grid-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
  }

  aside {
    position: sticky;
    top: 120px;
    align-self: start;
  }
}

@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;
  }

  html {
    scroll-behavior: auto;
  }
}

@media print {
  body {
    background: white;
    color: black;
  }

  header, footer, nav, aside, .breadcrumbs {
    display: none;
  }

  main {
    max-width: 100%;
    padding: 0;
  }

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

  details {
    border: 1px solid #ccc;
  }

  details summary::before {
    content: '';
  }

  details[open] summary {
    border-bottom: 1px solid #ccc;
  }

  table {
    border: 1px solid #000;
  }

  th, td {
    border: 1px solid #000;
  }
}