/* HookScan — docs page styles (extends hookscan.css) */

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body.docs-page {
  background:
    /* faint grid lines */
    linear-gradient(transparent 95%, rgba(255, 0, 122, .03) 100%) 0 0 / 100% 32px,
    linear-gradient(90deg, transparent 95%, rgba(255, 0, 122, .03) 100%) 0 0 / 32px 100%,
    /* base color */
    var(--bg);
  position: relative;
  overflow-x: hidden;
}

/* Dotted texture overlay */
body.docs-page::before {
  content: "";
  position: fixed; inset: 0;
  background-image: radial-gradient(rgba(255, 0, 122, .06) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
  opacity: .35;
  mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
}

/* Soft fading scan-line drifts across viewport occasionally */
body.docs-page::after {
  content: "";
  position: fixed; left: 0; right: 0; top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--pink) 50%, transparent);
  filter: drop-shadow(0 0 6px rgba(255, 0, 122, .35));
  opacity: 0;
  z-index: 1; pointer-events: none;
  animation: page-scan 22s ease-in-out infinite;
}
@keyframes page-scan {
  0%, 100% { opacity: 0; transform: translateY(0); }
  5%       { opacity: .8; }
  50%      { opacity: .8; transform: translateY(100vh); }
  50.1%    { opacity: 0; }
}

/* Decorative background — large flowing pink wave bands */
.dbg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  overflow: hidden;
}
.dbg__waves {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  filter: blur(1px);
}
.dbg__wave {
  stroke-dasharray: 3000;
  stroke-dashoffset: 3000;
  animation: wave-draw 3.4s cubic-bezier(.16,.84,.27,1) forwards,
             wave-drift 22s ease-in-out infinite;
  transform-origin: center;
}
.dbg__wave--1 { animation-delay: .1s, 3.5s; }
.dbg__wave--2 { animation-delay: .35s, 3.8s; }
.dbg__wave--3 { animation-delay: .6s, 4.2s; }
.dbg__wave--4 { animation-delay: .85s, 4.6s; }
.dbg__wave--5 { animation-delay: 1.1s, 5s; }

@keyframes wave-draw {
  to { stroke-dashoffset: 0; }
}
@keyframes wave-drift {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(-30px, 12px); }
}

/* Faint hook silhouette anchored on right edge */
.dbg__hook {
  position: fixed;
  right: -120px; top: 20%;
  width: 480px; height: auto;
  opacity: .06;
  z-index: 0; pointer-events: none;
  animation: hook-float 18s ease-in-out infinite;
  filter: blur(.5px);
}
@keyframes hook-float {
  0%, 100% { transform: translate(0, 0) rotate(0); }
  50%      { transform: translate(-20px, -30px) rotate(-3deg); }
}

body.docs-page > * { position: relative; z-index: 2; }
body.docs-page > .dbg { z-index: 0; }

.nav__links .is-active { color: var(--pink); }
.nav__links .is-active::after { transform: scaleX(1); }

/* Hero */
.dhero {
  padding: clamp(70px, 12vh, 130px) clamp(20px, 4vw, 48px) 30px;
  max-width: 1080px; margin: 0 auto;
}
.dhero__back {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  background: var(--panel); border: 1px solid var(--border-strong);
  border-radius: 99px;
  font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: 0.18em;
  color: var(--ink); text-decoration: none;
  margin-bottom: 22px;
  transition: all .25s ease;
}
.dhero__back:hover { background: var(--pink); color: #fff; border-color: var(--pink); transform: translateX(-3px); }
.dhero__back svg { width: 14px; height: 14px; transition: transform .25s ease; }
.dhero__back:hover svg { transform: translateX(-3px); }

.dhero__crumbs {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  color: var(--ink-mute); letter-spacing: 0.2em;
  margin-bottom: 20px;
}
.dhero__crumbs a { color: var(--ink-soft); }
.dhero__crumbs a:hover { color: var(--pink); }
.dhero__crumbs em { color: var(--pink); font-style: normal; }
.dhero__title {
  font-family: var(--sans); font-size: clamp(38px, 6.5vw, 88px);
  font-weight: 800; line-height: 0.95; letter-spacing: -0.04em;
  margin: 0 0 28px;
  display: flex; flex-direction: column; gap: 4px;
}
.dhero__title em {
  font-style: normal;
  background: linear-gradient(95deg, var(--pink) 35%, var(--red));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.dhero__title span {
  opacity: 0; transform: translateY(20px);
  animation: dh-in .8s cubic-bezier(.2,.7,.1,1) forwards;
}
.dhero__title span:nth-child(1) { animation-delay: .2s; }
.dhero__title span:nth-child(2) { animation-delay: .4s; }
.dhero__title span:nth-child(3) { animation-delay: .6s; }
@keyframes dh-in { to { opacity: 1; transform: translateY(0); } }

.dhero__sub {
  font-size: 18px; color: var(--ink-soft);
  max-width: 660px; margin: 0 0 32px;
  opacity: 0; transform: translateY(12px);
  animation: dh-in .8s ease .8s forwards;
}
.dhero__sub code {
  font-family: var(--mono); font-size: 14px;
  background: var(--bg-soft); padding: 2px 6px; border-radius: 4px; color: var(--pink-deep);
}

.dhero__meta {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  max-width: 720px;
  opacity: 0; transform: translateY(12px);
  animation: dh-in .8s ease 1s forwards;
}
.dhero__meta > div {
  padding: 14px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px;
  display: flex; flex-direction: column; gap: 4px;
}
.dhero__meta span {
  font-family: var(--mono); font-size: 9px; font-weight: 600;
  color: var(--ink-mute); letter-spacing: 0.2em;
}
.dhero__meta em {
  font-family: var(--mono); font-style: normal; font-size: 13px; font-weight: 600;
  color: var(--ink);
}

/* TOC sidebar — pinned glass card on the very left */
.dtoc {
  position: fixed; left: 16px; top: 50%;
  transform: translateY(-50%);
  width: 230px; max-height: calc(100vh - 100px);
  overflow-y: auto;
  z-index: 5;
  display: none;
  background: rgba(255, 255, 255, .82);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 18px 38px -22px rgba(255, 0, 122, .25);
}
.dtoc .kicker {
  display: block; margin-bottom: 10px; font-size: 9px;
  letter-spacing: 0.2em;
}
.dtoc ol {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 4px;
}
.dtoc a {
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-mute);
  display: block;
  padding: 5px 8px; border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  transition: all .25s ease;
  white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.dtoc a:hover { color: var(--ink); border-color: var(--border-strong); background: var(--bg-soft); }
.dtoc a.is-active { color: var(--pink); border-color: var(--pink); background: var(--bg-soft); }

@media (min-width: 1280px) { .dtoc { display: block; } }

/* Body — leave space for TOC on wide viewports */
.dbody {
  max-width: 880px; margin: 0 auto;
  padding: 40px clamp(20px, 4vw, 48px) 100px;
  position: relative; z-index: 1;
}
@media (min-width: 1280px) {
  .dbody { padding-left: 280px; max-width: 1160px; }
  .dhero { padding-left: 280px; max-width: 1160px; margin: 0 auto; }
}

.dsec {
  margin-bottom: 80px;
  transition: opacity 1.1s cubic-bezier(.16,.84,.27,1), transform 1.1s cubic-bezier(.16,.84,.27,1);
}
/* Hidden initial state applies ONLY after JS marks the element as ready to animate. */
.dsec[data-reveal-pending] { opacity: 0; transform: translateY(40px); }
.dsec.is-in { opacity: 1; transform: translateY(0); }

/* Internal stagger — kicker, h2, paragraph, then children */
.dsec[data-reveal-pending] .kicker,
.dsec[data-reveal-pending] h2,
.dsec[data-reveal-pending] p,
.dsec[data-reveal-pending] .bitmap,
.dsec[data-reveal-pending] .diagram,
.dsec[data-reveal-pending] .dgrid,
.dsec[data-reveal-pending] .code,
.dsec[data-reveal-pending] .formula,
.dsec[data-reveal-pending] .checklist,
.dsec[data-reveal-pending] .dquote {
  opacity: 0; transform: translateY(20px);
}
.dsec .kicker,
.dsec h2,
.dsec p,
.dsec .bitmap,
.dsec .diagram,
.dsec .dgrid,
.dsec .code,
.dsec .formula,
.dsec .checklist,
.dsec .dquote {
  transition: opacity 1s cubic-bezier(.16,.84,.27,1), transform 1s cubic-bezier(.16,.84,.27,1);
}
.dsec.is-in .kicker  { transition-delay: .05s; opacity: 1; transform: translateY(0); }
.dsec.is-in h2       { transition-delay: .15s; opacity: 1; transform: translateY(0); }
.dsec.is-in p        { transition-delay: .25s; opacity: 1; transform: translateY(0); }
.dsec.is-in .bitmap,
.dsec.is-in .diagram,
.dsec.is-in .dgrid,
.dsec.is-in .code,
.dsec.is-in .formula,
.dsec.is-in .checklist,
.dsec.is-in .dquote  { transition-delay: .35s; opacity: 1; transform: translateY(0); }
.dsec .kicker { display: block; margin-bottom: 16px; }
.dsec h2 {
  font-family: var(--sans); font-size: clamp(26px, 4vw, 44px);
  font-weight: 800; letter-spacing: -0.03em; line-height: 1.05;
  margin: 0 0 18px;
}
.dsec p {
  font-size: 16px; color: var(--ink-soft); line-height: 1.7;
  margin: 0 0 16px; max-width: 700px;
}
.dsec p code, .dsec li code {
  font-family: var(--mono); font-size: 13px;
  background: var(--bg-soft); padding: 2px 6px; border-radius: 4px; color: var(--pink-deep);
}
.dsec p em { color: var(--pink); font-style: normal; font-weight: 600; }
.dsec p b { color: var(--ink); font-weight: 700; }

/* Quote */
.dquote {
  margin: 32px 0; padding: 24px 28px;
  background: linear-gradient(135deg, #fff 0%, #FFEAF0 100%);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--pink);
  border-radius: 14px;
  font-family: var(--mono); font-size: 14px; color: var(--ink); line-height: 1.6;
  font-style: italic;
}
.dquote p { margin: 0; color: var(--ink); max-width: none; }

/* Bitmap visualizer */
.bitmap {
  margin: 32px 0;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px;
  box-shadow: var(--shadow);
}
.bitmap__head {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 18px; flex-wrap: wrap;
}
.bitmap__addr-lbl {
  font-family: var(--mono); font-size: 10px; font-weight: 600;
  color: var(--ink-mute); letter-spacing: 0.2em;
}
.bitmap__addr {
  flex: 1; min-width: 0;
  font-family: var(--mono); font-size: 12px; color: var(--ink);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.bitmap__shuffle {
  background: var(--pink); color: #fff; border: none;
  font-family: var(--mono); font-size: 10px; font-weight: 600; letter-spacing: 0.16em;
  padding: 6px 12px; border-radius: 99px;
  transition: background .2s ease, transform .15s ease;
}
.bitmap__shuffle:hover { background: var(--pink-deep); transform: translateY(-1px); }

.bitmap__bits {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 8px;
  margin-bottom: 16px;
}
.bit {
  position: relative;
  padding: 12px 30px 12px 12px;     /* room for the value pill on the right */
  background: var(--panel-soft); border: 1px solid var(--border);
  border-radius: 10px;
  display: flex; flex-direction: column; gap: 6px; align-items: flex-start;
  font-family: var(--mono); transition: all .35s ease;
  cursor: default;
  min-width: 0; overflow: hidden;
  animation: bit-in .35s cubic-bezier(.2,.7,.1,1) both;
}
.bit__name {
  overflow: hidden; text-overflow: ellipsis;
  max-width: 100%;
}
.bit:nth-child(1)  { animation-delay: .02s; }
.bit:nth-child(2)  { animation-delay: .04s; }
.bit:nth-child(3)  { animation-delay: .06s; }
.bit:nth-child(4)  { animation-delay: .08s; }
.bit:nth-child(5)  { animation-delay: .1s; }
.bit:nth-child(6)  { animation-delay: .12s; }
.bit:nth-child(7)  { animation-delay: .14s; }
.bit:nth-child(8)  { animation-delay: .16s; }
.bit:nth-child(9)  { animation-delay: .18s; }
.bit:nth-child(10) { animation-delay: .2s; }
.bit:nth-child(11) { animation-delay: .22s; }
.bit:nth-child(12) { animation-delay: .24s; }
.bit:nth-child(13) { animation-delay: .26s; }
.bit:nth-child(14) { animation-delay: .28s; }
@keyframes bit-in {
  from { opacity: 0; transform: translateY(8px) scale(.85); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.bit__idx { font-size: 9px; font-weight: 700; color: var(--ink-mute); letter-spacing: 0.14em; }
.bit__name { font-size: 10px; font-weight: 600; color: var(--ink); line-height: 1.2; }
.bit__val {
  position: absolute; top: 8px; right: 8px;
  width: 18px; height: 18px; border-radius: 4px;
  display: grid; place-items: center;
  font-size: 10px; font-weight: 700; color: var(--ink-mute);
  background: var(--bg-soft);
  transition: all .3s ease;
}
.bit.is-on { border-color: var(--pink); background: linear-gradient(135deg, #FFF 0%, #FFEAF0 100%); }
.bit.is-on .bit__name { color: var(--pink-deep); }
.bit.is-on .bit__val { background: var(--pink); color: #fff; }

.bitmap__legend {
  display: flex; flex-wrap: wrap; gap: 16px;
  font-family: var(--mono); font-size: 11px; color: var(--ink-mute);
}
.bitmap__legend .dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  margin-right: 4px; vertical-align: middle;
}
.dot--on  { background: var(--pink); }
.dot--off { background: var(--border-strong); }

/* Pipeline diagram */
.diagram {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin: 32px 0;
  flex-wrap: wrap;
}
.node {
  flex: 1; min-width: 140px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 16px;
  position: relative;
  transition: all .3s ease;
  animation: node-in .6s cubic-bezier(.2,.7,.1,1) both;
}
.node:nth-child(1) { animation-delay: .1s; }
.node:nth-child(3) { animation-delay: .25s; }
.node:nth-child(5) { animation-delay: .4s; }
.node:nth-child(7) { animation-delay: .55s; }
@keyframes node-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.node::before {
  content: attr(data-step);
  position: absolute; top: -10px; left: 12px;
  background: var(--pink); color: #fff;
  font-family: var(--mono); font-size: 9px; font-weight: 700; letter-spacing: 0.16em;
  padding: 3px 7px; border-radius: 99px;
}
.node__lbl { font-family: var(--mono); font-size: 9px; font-weight: 700; color: var(--pink); letter-spacing: 0.2em; }
.node__val { font-family: var(--sans); font-size: 15px; font-weight: 700; color: var(--ink); margin: 6px 0 4px; }
.node__hint { font-family: var(--mono); font-size: 10px; color: var(--ink-mute); letter-spacing: 0.06em; }
.arrow {
  flex: 0 0 28px; height: 2px; background: var(--border-strong);
  position: relative; align-self: center;
}
.arrow::after {
  content: ""; position: absolute; right: -1px; top: -3px;
  border: 4px solid transparent; border-left-color: var(--border-strong);
}
.arrow span {
  position: absolute; left: 0; top: -1px; bottom: -1px;
  background: linear-gradient(90deg, var(--pink), var(--red));
  animation: arrow-flow 2s ease-in-out infinite;
  border-radius: 2px;
}
@keyframes arrow-flow {
  0%   { width: 0%; left: 0; }
  50%  { width: 100%; left: 0; }
  100% { width: 0%; left: 100%; }
}

/* Stat grid */
.dgrid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  margin: 32px 0;
}
.dstat {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px;
  transition: all .3s ease;
}
.dstat:hover { transform: translateY(-2px); border-color: var(--pink); }
.dstat__num {
  font-family: var(--mono); font-weight: 800; font-size: 28px;
  color: var(--ink); letter-spacing: -0.02em; line-height: 1;
}
.dstat__lbl {
  font-family: var(--mono); font-size: 10px; font-weight: 500;
  color: var(--ink-mute); letter-spacing: 0.18em; margin-top: 8px;
}

/* Code blocks — light card on white with subtle pink accents */
.code {
  margin: 24px 0;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--panel-soft) 100%);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  font-family: var(--mono);
  position: relative;
  box-shadow: 0 10px 30px -22px rgba(255, 0, 122, .3);
}
.code::before {
  content: attr(data-lang);
  position: absolute; top: 12px; right: 16px;
  font-size: 9px; font-weight: 700; letter-spacing: 0.18em;
  color: var(--pink); opacity: .8;
  background: var(--bg-soft);
  padding: 3px 8px; border-radius: 99px;
  border: 1px solid var(--border);
}
.code pre { margin: 0; padding: 24px 22px; overflow-x: auto; font-size: 13px; line-height: 1.7; color: var(--ink); }
.code .kw  { color: var(--pink); font-weight: 700; }
.code .ty  { color: var(--pink-deep); }
.code .fn  { color: var(--ink); font-weight: 700; }
.code .str { color: #00805C; }
.code .cmt { color: var(--ink-mute); font-style: italic; }

/* Formula */
.formula {
  margin: 24px 0;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px;
}
.formula__row {
  display: grid; grid-template-columns: 200px 1fr auto; gap: 14px;
  align-items: center; padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}
.formula__row:last-of-type { border-bottom: 1px solid var(--border-strong); }
.formula__row span {
  font-family: var(--mono); font-size: 11px; font-weight: 600;
  color: var(--ink-mute); letter-spacing: 0.16em;
}
.formula__row i {
  display: block; height: 8px; border-radius: 99px;
  background: linear-gradient(90deg, var(--pink), var(--red));
  width: var(--w, 50%);
  position: relative; overflow: hidden;
}
.formula__row i::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 40%, rgba(255,255,255,.5), transparent 60%);
  animation: shimmer 2.4s ease-in-out infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }
.formula__row em {
  font-family: var(--mono); font-style: normal; font-size: 13px; font-weight: 700;
  color: var(--ink);
}
.formula__total {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 14px;
  font-family: var(--mono); font-size: 15px; font-weight: 800;
  color: var(--pink);
}

/* Checklist */
.checklist {
  list-style: none; margin: 24px 0; padding: 0;
  display: grid; gap: 12px;
}
.checklist li {
  display: grid; grid-template-columns: 30px 1fr; gap: 14px;
  padding: 16px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color .25s ease, transform .25s ease;
}
.checklist li:hover { border-color: var(--pink); transform: translateX(4px); }
.checklist li span {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--good); color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: 13px;
}
.checklist li div { font-size: 14px; color: var(--ink-soft); }
.checklist li b { color: var(--ink); font-weight: 700; }
.checklist li code { font-family: var(--mono); font-size: 12px; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; color: var(--pink-deep); }

.dfoot-cta {
  display: flex; gap: 12px; margin-top: 32px; flex-wrap: wrap;
}

/* Return-to-dashboard card at the bottom */
.dreturn {
  margin-top: 60px;
  transition: opacity .8s cubic-bezier(.2,.7,.1,1), transform .8s cubic-bezier(.2,.7,.1,1);
}
.dreturn[data-reveal-pending] { opacity: 0; transform: translateY(28px); }
.dreturn.is-in { opacity: 1; transform: translateY(0); }
.dreturn__card {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
  padding: 36px clamp(24px, 4vw, 48px);
  background: linear-gradient(135deg, #FFFFFF 0%, #FFEAF0 100%);
  color: var(--ink);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  text-decoration: none;
  position: relative; overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  box-shadow: 0 30px 60px -28px rgba(255,0,122,.4);
}
.dreturn__card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 35%, rgba(255,0,122,.18) 50%, transparent 65%);
  transform: translateX(-120%);
  transition: transform .9s ease;
  pointer-events: none;
}
.dreturn__card:hover { transform: translateY(-4px); border-color: var(--pink); }
.dreturn__card:hover::before { transform: translateX(120%); }
.dreturn__card .kicker { color: var(--pink); }
.dreturn__card h3 {
  font-family: var(--sans);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 800; letter-spacing: -0.03em;
  margin: 12px 0 8px;
  color: var(--ink);
}
.dreturn__card h3 .serif { color: var(--pink-deep); }
.dreturn__card p {
  color: var(--ink-soft); margin: 0; font-size: 14px;
  max-width: 480px;
}
.dreturn__cta {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--pink); color: #fff;
  padding: 14px 22px; border-radius: 99px;
  font-family: var(--mono); font-size: 12px; font-weight: 700; letter-spacing: 0.2em;
  transition: background .2s ease, transform .25s ease;
}
.dreturn__cta svg { width: 14px; height: 14px; transition: transform .25s ease; }
.dreturn__card:hover .dreturn__cta { background: var(--pink-deep); }
.dreturn__card:hover .dreturn__cta svg { transform: translateX(-3px); }

@media (max-width: 720px) {
  .dgrid { grid-template-columns: repeat(2, 1fr); }
  .dhero__meta { grid-template-columns: repeat(2, 1fr); }
  .diagram { flex-direction: column; }
  .arrow { width: 2px; height: 28px; }
  .formula__row { grid-template-columns: 100px 1fr auto; gap: 10px; }
}