.deepdoc-hero {
  position: relative;
  padding-top: 74px;
  padding-bottom: 54px;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-hero::before {
  position: absolute;
  top: -220px;
  right: -180px;
  width: 660px;
  height: 660px;
  content: "";
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-accent-glow), transparent 70%);
  pointer-events: none;
}

.deepdoc-hero::after {
  position: absolute;
  bottom: -280px;
  left: -250px;
  width: 620px;
  height: 620px;
  content: "";
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-teal-glow), transparent 70%);
  pointer-events: none;
}

.deepdoc-hero__layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(380px, .92fr);
  align-items: center;
  gap: 54px;
}

.deepdoc-hero__copy {
  max-width: 700px;
}

.deepdoc-hero__eyebrow {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 760;
}

.deepdoc-hero h1 {
  max-width: 690px;
}

.deepdoc-hero h1 .no-break {
  background: linear-gradient(98deg, var(--color-accent-light), var(--color-accent-dark));
  background-clip: text;
  color: transparent;
  -webkit-background-clip: text;
}

.deepdoc-hero__lead {
  max-width: 680px;
  margin: 22px 0 0;
  color: var(--color-text-muted);
  font-size: 19px;
  line-height: 1.75;
}

.deepdoc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 28px;
}

.deepdoc-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.deepdoc-diagram {
  position: relative;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-mid);
}

.deepdoc-diagram svg {
  width: 100%;
  height: auto;
}

.deepdoc-diagram__under {
  fill: none;
  stroke: var(--color-white);
  stroke-linecap: round;
  stroke-width: 9;
}

.deepdoc-diagram__line {
  fill: none;
  stroke-linecap: round;
  stroke-width: 3;
}

.deepdoc-diagram__line--direct {
  stroke: var(--color-direct);
}

.deepdoc-diagram__line--relay {
  stroke: var(--color-relay);
}

.deepdoc-diagram__line--dedicated {
  stroke: var(--color-dedicated);
}

.deepdoc-diagram__hub-glow {
  fill: var(--color-accent-soft);
}

.deepdoc-diagram__hub,
.deepdoc-diagram__node {
  fill: var(--color-white);
  stroke: var(--color-border);
  stroke-width: 1;
}

.deepdoc-diagram__hub {
  filter: drop-shadow(0 12px 16px var(--color-accent-glow));
}

.deepdoc-diagram__node {
  filter: drop-shadow(0 7px 9px var(--color-shadow-soft));
}

.deepdoc-diagram__bolt {
  fill: var(--color-accent);
}

.deepdoc-diagram__dot--direct {
  fill: var(--color-direct);
}

.deepdoc-diagram__dot--relay {
  fill: var(--color-relay);
}

.deepdoc-diagram__dot--dedicated {
  fill: var(--color-dedicated);
}

.deepdoc-diagram__text {
  fill: var(--color-text);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 760;
}

.deepdoc-diagram__legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 4px;
  color: var(--color-text-muted);
  font-size: 12px;
  font-weight: 700;
}

.deepdoc-diagram__legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.deepdoc-diagram__legend i {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  border-radius: var(--radius-pill);
}

.deepdoc-shell {
  padding-top: 52px;
}

.deepdoc-intro {
  max-width: var(--prose-width);
  margin-inline: auto;
  padding: 24px 27px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-low);
  color: var(--color-text-muted);
  font-size: 17px;
}

.deepdoc-intro strong {
  color: var(--color-text);
}

.deepdoc-intro a {
  color: var(--color-accent-dark);
  font-weight: 760;
  text-decoration: underline;
  text-underline-offset: .2em;
}

.deepdoc-shell > .toc-tabs {
  margin-inline: auto;
}

.deepdoc-article {
  width: 100%;
  max-width: var(--prose-width);
  margin-inline: auto;
}

.deepdoc-section {
  padding-top: 68px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: var(--toc-offset);
}

.deepdoc-section:last-child {
  border-bottom: 0;
}

.deepdoc-section h2 {
  margin-bottom: 30px;
}

.deepdoc-section h3 {
  margin-top: 38px;
  margin-bottom: 14px;
  font-size: 24px;
}

.deepdoc-section p,
.deepdoc-section li {
  color: var(--color-text-muted);
}

.deepdoc-section p {
  margin-bottom: 20px;
  font-size: 17px;
  line-height: 1.9;
}

.deepdoc-section a:not(.btn-primary):not(.btn-secondary) {
  color: var(--color-accent-dark);
  font-weight: 760;
  text-decoration: underline;
  text-decoration-thickness: .08em;
  text-underline-offset: .2em;
}

.deepdoc-section .table-scroll {
  margin-top: 28px;
  margin-bottom: 30px;
}

.deepdoc-section pre {
  margin-top: 22px;
  margin-bottom: 22px;
}

.deepdoc-section .callout {
  font-size: 16px;
  line-height: 1.8;
}

.deepdoc-section .callout strong {
  color: var(--color-text);
}

@media (max-width: 980px) {
  .deepdoc-hero__layout {
    grid-template-columns: 1fr;
  }

  .deepdoc-hero__copy {
    max-width: 760px;
  }

  .deepdoc-diagram {
    max-width: 680px;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 54px;
    padding-bottom: 42px;
  }

  .deepdoc-hero::before,
  .deepdoc-hero::after {
    display: none;
  }

  .deepdoc-hero__layout {
    gap: 38px;
  }

  .deepdoc-hero__lead {
    font-size: 17px;
  }

  .deepdoc-diagram {
    padding: 14px;
  }

  .deepdoc-section {
    padding-top: 58px;
  }

  .deepdoc-section h3 {
    font-size: 22px;
  }

  .deepdoc-section p {
    font-size: 16px;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 42px;
  }

  .deepdoc-hero__layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .deepdoc-hero__actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .deepdoc-hero__actions .btn-primary,
  .deepdoc-hero__actions .btn-secondary {
    width: 100%;
  }

  .deepdoc-diagram {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .deepdoc-diagram svg {
    width: 500px;
    max-width: none;
  }

  .deepdoc-diagram__legend {
    justify-content: flex-start;
  }

  .deepdoc-shell {
    padding-top: 38px;
  }

  .deepdoc-intro {
    padding: 21px;
    font-size: 15px;
  }

  .deepdoc-section {
    padding-top: 48px;
  }

  .deepdoc-section h2 {
    margin-bottom: 24px;
  }

  .deepdoc-section h3 {
    margin-top: 32px;
    font-size: 20px;
  }

  .deepdoc-section p {
    font-size: 15px;
    line-height: 1.85;
  }
}