.subpage-main {
  padding: 72px 0 0;
}

.subpage-hero {
  padding: 24px 0 52px;
  border-bottom: 1px solid var(--line);
}

.subpage-hero h1 {
  max-width: 12ch;
  margin: 0 0 18px;
  font-size: clamp(3rem, 6vw, 4.8rem);
  line-height: 0.94;
}

.subpage-hero p {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.66;
}

.subpage-body {
  width: min(100%, 860px);
  padding: 42px 0 56px;
}

.subpage-body section + section {
  margin-top: 34px;
}

.subpage-body h2 {
  max-width: none;
  margin: 0 0 14px;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  line-height: 1.06;
}

.subpage-body h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  line-height: 1.15;
}

.subpage-body p,
.subpage-body li {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.72;
}

.subpage-body p {
  margin: 0 0 14px;
}

.subpage-body ul {
  margin: 0;
  padding-left: 20px;
}

.subpage-body li + li {
  margin-top: 8px;
}

.diagram-caption {
  margin-bottom: 12px;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.55;
}

.diagram-render {
  margin-bottom: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0d0d0d;
}

.diagram-render .mermaid {
  margin: 0;
  text-align: center;
}

.diagram-source {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.diagram-source summary {
  cursor: pointer;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.4;
}

.diagram-source[open] summary {
  margin-bottom: 12px;
}

.diagram-code {
  overflow-x: auto;
  margin: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #0d0d0d;
}

.diagram-code code {
  display: block;
  color: #f1d56a;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.58;
  white-space: pre;
}

.diagram-download {
  display: inline-flex;
  margin-top: 12px;
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.subpage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 34px;
}

.subpage-card {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.subpage-callout {
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.subpage-callout strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 1rem;
}

.benchmark-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 26px;
}

.benchmark-panel {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.benchmark-panel h3 {
  margin-bottom: 14px;
}

.benchmark-row + .benchmark-row {
  margin-top: 16px;
}

.benchmark-label {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.4;
}

.benchmark-label span {
  color: var(--muted);
  white-space: nowrap;
}

.benchmark-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.benchmark-bar-fill {
  display: block;
  height: 100%;
  min-width: 10px;
  border-radius: inherit;
}

.benchmark-bar-fill-accent {
  background: linear-gradient(90deg, #3fc7ff 0%, #1989ff 100%);
}

.benchmark-bar-fill-warm {
  background: linear-gradient(90deg, #ffcb5c 0%, #ff8b2b 100%);
}

.subpage-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  margin-top: 18px;
}

.subpage-inline-links a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

@media (max-width: 900px) {
  .subpage-grid {
    grid-template-columns: 1fr;
  }

  .benchmark-compare {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .subpage-main {
    padding-top: 88px;
  }

  .subpage-hero {
    padding: 8px 0 28px;
  }

  .subpage-hero h1 {
    max-width: none;
    margin-bottom: 14px;
    font-size: clamp(2.2rem, 9.6vw, 3.2rem);
  }

  .subpage-hero p,
  .subpage-body p,
  .subpage-body li {
    font-size: 0.94rem;
    line-height: 1.52;
  }

  .subpage-body {
    width: 100%;
    padding: 28px 0 34px;
  }

  .subpage-body h2 {
    font-size: clamp(1.45rem, 6vw, 1.95rem);
  }

  .diagram-code {
    padding: 14px 16px;
  }

  .diagram-code code {
    font-size: 0.84rem;
    line-height: 1.5;
  }

  .diagram-render {
    padding: 14px 16px;
  }
}