:root {
  --doc-hero-min-height: 620px;
  --doc-hero-padding-top: clamp(64px, 8vw, 108px);
  --doc-hero-padding-bottom: clamp(70px, 9vw, 120px);
  --doc-hero-gap: clamp(38px, 6vw, 82px);
  --doc-copy-width: 690px;
  --doc-visual-width: 490px;
  --doc-window-min-height: 480px;
  --doc-panel-padding: clamp(24px, 4vw, 38px);
  --doc-message-width: 86%;
  --doc-message-gap: 18px;
  --doc-layout-gap: 34px;
  --doc-intro-space: 58px;
  --doc-reading-width: 860px;
  --doc-chapter-space: clamp(76px, 9vw, 116px);
  --doc-heading-gap: 12px;
  --doc-line-width: 2px;
  --doc-node-size: 12px;
  --doc-index-width: 94px;
  --doc-table-min-width: 720px;
  --doc-ticket-gap: 16px;
  --doc-small-text: 12px;
  --doc-meta-text: 13px;
  --doc-lead-text: clamp(17px, 2vw, 20px);
  --doc-body-text: 16px;
  --doc-letter-wide: 0.08em;
  --doc-shadow-offset: 22px;
}

.doc-page {
  position: relative;
  overflow-x: clip;
}

.doc-hero {
  position: relative;
  min-height: var(--doc-hero-min-height);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-soft);
}

.doc-hero::after {
  position: absolute;
  right: calc(var(--gutter) * -1);
  bottom: calc(var(--doc-shadow-offset) * -1);
  width: min(52vw, 680px);
  aspect-ratio: 1;
  content: "";
  border: 1px dashed var(--color-border-soft);
  border-radius: 50%;
  opacity: 0.48;
  pointer-events: none;
}

.doc-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: var(--doc-hero-min-height);
  padding-top: var(--doc-hero-padding-top);
  padding-bottom: var(--doc-hero-padding-bottom);
  grid-template-columns: minmax(0, var(--doc-copy-width)) minmax(360px, var(--doc-visual-width));
  align-items: center;
  justify-content: space-between;
  gap: var(--doc-hero-gap);
}

.doc-hero-copy {
  position: relative;
  z-index: 2;
}

.doc-hero-copy h1 {
  margin-top: 22px;
}

.doc-lead {
  max-width: 650px;
  color: var(--color-text-muted);
  font-size: var(--doc-lead-text);
  line-height: 1.85;
}

.doc-hero-links {
  display: flex;
  margin-top: 30px;
  flex-wrap: wrap;
  gap: 12px;
}

.diagnostic-window {
  position: relative;
  min-height: var(--doc-window-min-height);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-window);
  background: var(--color-panel);
  box-shadow: var(--shadow-window), inset 0 1px 0 var(--color-white-medium);
}

.diagnostic-window::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    radial-gradient(circle at 92% 12%, var(--color-accent-soft), var(--color-transparent) 30%),
    linear-gradient(145deg, var(--color-white-soft), var(--color-transparent) 38%);
  pointer-events: none;
}

.diagnostic-window-bar {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 78px;
  padding: 16px 22px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-overlay);
}

.diagnostic-window-bar strong {
  display: block;
  color: var(--color-text);
  font-size: 15px;
}

.diagnostic-label {
  display: block;
  margin-bottom: 4px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: var(--doc-letter-wide);
}

.diagnostic-flow {
  position: relative;
  display: grid;
  padding: 30px 26px;
  gap: var(--doc-message-gap);
}

.diagnostic-message {
  position: relative;
  z-index: 2;
  width: var(--doc-message-width);
  margin-left: auto;
  padding: 18px 20px;
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-medium);
  color: var(--color-text);
  background: var(--color-panel-soft);
  box-shadow: var(--shadow-bubble);
}

.diagnostic-message:nth-child(2) {
  margin-right: auto;
  margin-left: 0;
}

.diagnostic-message-light {
  color: var(--color-text-dark);
  background: var(--color-panel-light);
}

.diagnostic-message span {
  display: block;
  margin-bottom: 5px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: var(--doc-letter-wide);
}

.diagnostic-message-light span {
  color: var(--color-accent-dark);
}

.diagnostic-message strong {
  display: block;
  margin-bottom: 7px;
  font-size: 14px;
}

.diagnostic-message p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: var(--doc-small-text);
  line-height: 1.65;
}

.diagnostic-message-light p {
  color: var(--color-text-dark-muted);
}

.diagnostic-route {
  position: absolute;
  top: 68px;
  bottom: 68px;
  left: 50%;
  z-index: 1;
  width: var(--doc-line-width);
  background: linear-gradient(180deg, var(--color-accent), var(--color-border), var(--color-success));
}

.diagnostic-route span {
  position: absolute;
  left: 50%;
  width: var(--doc-node-size);
  height: var(--doc-node-size);
  border: 3px solid var(--color-panel);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px var(--color-accent-soft);
  transform: translateX(-50%);
}

.diagnostic-route span:first-child {
  top: 0;
}

.diagnostic-route span:nth-child(2) {
  top: 50%;
}

.diagnostic-route span:last-child {
  bottom: 0;
  background: var(--color-success);
}

.doc-layout {
  padding-top: var(--doc-intro-space);
  padding-bottom: var(--section-space);
}

.doc-intro {
  width: min(100%, var(--doc-reading-width));
  margin-inline: auto;
}

.doc-intro-panel {
  padding: var(--doc-panel-padding);
}

.doc-intro-title {
  font-size: clamp(26px, 4vw, 36px);
}

.doc-intro-panel p:last-child {
  margin-bottom: 0;
}

.doc-intro-panel a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-glow);
  text-underline-offset: 0.18em;
}

.doc-article {
  width: min(100%, var(--doc-reading-width));
  margin-inline: auto;
  font-size: var(--doc-body-text);
}

.doc-chapter {
  position: relative;
  padding-top: var(--doc-chapter-space);
}

.doc-chapter::before {
  position: absolute;
  top: calc(var(--doc-chapter-space) + 8px);
  bottom: 0;
  left: calc(var(--doc-index-width) / 2);
  z-index: -1;
  width: var(--doc-line-width);
  content: "";
  background: linear-gradient(180deg, var(--color-accent-glow), var(--color-border-soft), var(--color-transparent));
}

.chapter-heading {
  position: relative;
  display: grid;
  margin-bottom: 34px;
  grid-template-columns: var(--doc-index-width) minmax(0, 1fr);
  align-items: start;
  gap: var(--doc-heading-gap);
}

.chapter-heading h2 {
  margin-bottom: 0;
  padding-top: 0;
}

.chapter-index {
  display: inline-flex;
  min-height: 34px;
  padding: 0 12px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent-glow);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  background: var(--color-panel);
  box-shadow: 0 8px 20px var(--color-shadow-soft);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 780;
  letter-spacing: var(--doc-letter-wide);
}

.doc-chapter h3 {
  margin-top: 42px;
  font-size: clamp(21px, 3vw, 27px);
}

.doc-chapter p,
.doc-chapter li {
  line-height: 1.9;
}

.doc-chapter p {
  color: var(--color-text-muted);
}

.doc-chapter strong {
  color: var(--color-text);
}

.doc-chapter .table-scroll {
  margin-top: 34px;
  margin-bottom: 34px;
}

.doc-chapter .data-table,
.doc-chapter .comparison-table {
  min-width: var(--doc-table-min-width);
}

.decision-strip {
  display: grid;
  margin-top: 34px;
  padding: 22px 24px;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  border: 1px solid var(--color-success);
  border-radius: var(--radius-medium);
  color: var(--color-text-muted);
  background: var(--color-success-soft);
}

.decision-strip strong {
  color: var(--color-success);
}

.ticket-template {
  display: grid;
  margin-top: 34px;
  margin-bottom: 34px;
  gap: var(--doc-ticket-gap);
}

.ticket-template > strong {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--doc-meta-text);
  letter-spacing: var(--doc-letter-wide);
}

.ticket-template pre {
  margin-bottom: 0;
}

@media (max-width: 980px) {
  .doc-hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .diagnostic-window {
    width: min(100%, 620px);
    min-height: 460px;
  }

  .doc-hero::after {
    width: 82vw;
  }
}

@media (max-width: 640px) {
  :root {
    --doc-hero-min-height: auto;
    --doc-hero-padding-top: 52px;
    --doc-hero-padding-bottom: 68px;
    --doc-window-min-height: 430px;
    --doc-message-width: 92%;
    --doc-index-width: 72px;
    --doc-chapter-space: 76px;
    --doc-body-text: 15px;
  }

  .doc-hero-links,
  .doc-hero-links .button {
    width: 100%;
  }

  .diagnostic-window {
    min-height: var(--doc-window-min-height);
    border-radius: var(--radius-large);
  }

  .diagnostic-window-bar {
    padding-inline: 17px;
  }

  .diagnostic-flow {
    padding-inline: 14px;
  }

  .diagnostic-message {
    padding: 15px 16px;
  }

  .doc-layout {
    padding-top: 42px;
  }

  .chapter-heading {
    grid-template-columns: 1fr;
  }

  .chapter-index {
    width: fit-content;
  }

  .doc-chapter::before {
    display: none;
  }

  .decision-strip {
    grid-template-columns: 1fr;
    padding: 19px;
  }

  .doc-chapter h3 {
    margin-top: 34px;
  }
}