.solver-doc {
  width: min(100%, 64rem);
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2.2rem);
  counter-reset: equation;
}

.doc-nav {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.doc-nav a {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.75rem;
  display: inline-block;
  background: var(--surface);
}

.doc-hero,
.doc-section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  margin-bottom: 1rem;
  padding: clamp(1rem, 2.4vw, 1.5rem);
}

.doc-hero {
  background: var(--surface);
}

.eyebrow {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 750;
  margin: 0 0 0.6rem;
}

.doc-hero h1,
.doc-section h2,
.doc-section h3,
.doc-hero p,
.doc-section p {
  margin-top: 0;
}

.doc-hero h1 {
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 0.95;
  margin-bottom: 1rem;
}

.doc-section h2 {
  font-size: 1.25rem;
}

.doc-section h3 {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 0.55rem;
}

.doc-hero p,
.doc-section p,
.doc-list {
  color: color-mix(in srgb, var(--text), var(--muted) 35%);
  line-height: 1.65;
}

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

.math-card {
  position: relative;
  counter-increment: equation;
  overflow-x: auto;
  border: 1px solid color-mix(in srgb, var(--line), var(--accent) 18%);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface), var(--stage-bg) 44%);
  color: var(--text);
  padding: 1rem 3.4rem 1rem 1.1rem;
  margin: 0.9rem 0;
  scrollbar-width: thin;
}

.math-card::after {
  content: "(" counter(equation) ")";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: color-mix(in srgb, var(--muted), transparent 12%);
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
}

.math-card math {
  display: block;
  min-width: max-content;
  color: var(--text);
  font-size: clamp(1.08rem, 1.65vw, 1.55rem);
  line-height: 1.45;
}

.tex-fallback {
  margin: 0;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
  line-height: 1.55;
}

.inline-tex {
  display: inline;
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
  font-size: 1em;
}

.math-roman {
  font-style: normal;
}

.inline-radicand {
  border-top: 1px solid currentColor;
  padding-left: 0.08em;
}

.formula-grid {
  display: grid;
  gap: 0.62rem;
  min-width: max-content;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1rem, 1.24vw, 1.18rem);
  line-height: 1.6;
}

.formula-grid-wide {
  font-size: clamp(0.98rem, 1.1vw, 1.12rem);
}

.formula-row {
  display: grid;
  grid-template-columns: minmax(7rem, max-content) 1.15rem max-content;
  gap: 0.48rem;
  align-items: center;
}

.formula-symbol,
.formula-expression {
  white-space: nowrap;
}

.formula-symbol {
  justify-self: end;
  color: color-mix(in srgb, var(--text), var(--muted) 8%);
  font-style: italic;
}

.formula-equals {
  color: var(--muted);
  text-align: center;
}

.formula-expression {
  color: var(--text);
}

.orbital-axis {
  font-size: 0.72em;
  margin-left: 0.04em;
  vertical-align: -0.24em;
}

.math-times {
  display: inline-block;
  padding: 0 0.16em;
}

.sqrt {
  display: inline-flex;
  align-items: flex-start;
  vertical-align: middle;
  white-space: nowrap;
}

.sqrt-symbol {
  font-size: 1.15em;
  line-height: 1.04;
  transform: translateY(0.06em);
}

.sqrt-radicand {
  border-top: 1.5px solid currentColor;
  line-height: 1.16;
  margin-left: -0.03em;
  padding: 0.08em 0.08em 0;
}

.frac {
  display: inline-grid;
  grid-template-rows: auto auto;
  align-items: center;
  justify-items: center;
  vertical-align: middle;
  line-height: 1.05;
  margin: 0 0.08em;
}

.frac > span:first-child {
  border-bottom: 1px solid currentColor;
  padding: 0 0.18em 0.08em;
}

.frac > span:last-child {
  padding: 0.08em 0.18em 0;
  font-size: 0.88em;
}

.doc-list {
  padding-left: 1.2rem;
  margin-bottom: 0;
}

.doc-list li + li {
  margin-top: 0.5rem;
}

.code-live {
  max-height: 30rem;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--stage-bg), black 20%);
  color: color-mix(in srgb, var(--text), var(--accent) 26%);
  padding: 1rem;
  margin: 0 0 1.2rem;
  font-size: 0.82rem;
  line-height: 1.55;
}

.code-live code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  white-space: pre;
}