.bl {
  --bl-tray: #f5f5f7;
  --bl-tray-hi: #efeff2;
  --bl-line: #e6e7eb;
  --bl-soft: #6b7280;
  --bl-grey: #8b8f9a;
  --bl-tint: #f7f7f9;
  --bl-pad: 32px;
}

.bl-frame {
  max-width: var(--container); margin-inline: auto;
  padding-inline: var(--bl-pad);
}

.bl-bar { position: relative; z-index: 1; border-bottom: 1px solid var(--rail); }
.bl-bar__in { display: flex; align-items: center; gap: 24px; height: 52px; }
.bl-bar__links {
  flex: 1; min-width: 0; height: 100%;
  list-style: none; margin: 0; padding: 0;
  display: flex; align-items: stretch; gap: 22px;
  overflow-x: auto; scrollbar-width: none;
}
.bl-bar__links::-webkit-scrollbar { display: none; }
.bl-bar__links li { display: flex; }
.bl-bar__link {
  display: flex; align-items: center; white-space: nowrap;
  font: 500 14px/1 var(--font-ui); letter-spacing: -.006em; color: #5f6571;
  box-shadow: inset 0 -1.5px 0 transparent;
  transition: color .15s ease, box-shadow .15s ease;
}
.bl-bar__link:hover { color: var(--ink-nav); }
.bl-bar__link[aria-current="page"] { color: var(--ink-nav); box-shadow: inset 0 -1.5px 0 var(--brand); }
.bl-bar__link:focus-visible { outline: 2px solid var(--brand); outline-offset: -2px; border-radius: 4px; }

.bl-search { position: relative; flex: none; }
.bl-search__icon {
  position: absolute; left: 10px; top: 50%; translate: 0 -50%;
  width: 15px; height: 15px; color: #9aa0ab; pointer-events: none;
}
.bl-search__icon *, .bl-search__go svg * { stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; }
.bl-search__input {
  width: 232px; height: 34px; padding: 0 12px 0 32px;
  border: 1px solid var(--bl-line); border-radius: 8px;
  background: var(--surface); color: var(--ink-nav);
  font: 400 14px/1 var(--font-ui);
  transition: border-color .15s ease;
}
.bl-search__input::placeholder { color: #9aa0ab; }
.bl-search__input:hover { border-color: #d6d8de; }
.bl-search__input:focus { outline: none; border-color: var(--brand); }
.bl-search__go {
  display: none; place-items: center; flex: none;
  width: 34px; height: 34px; border-radius: 8px;
  border: 1px solid var(--bl-line); background: var(--surface); color: var(--ink-nav);
}
.bl-search__go svg { width: 15px; height: 15px; }

.bl-intro { position: relative; z-index: 1; padding: 64px 0 56px; border-bottom: 1px solid var(--rail); }
.bl-intro__in { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px 48px; }
.bl-intro__text { min-width: 0; }
.bl-intro__title {
  margin: 14px 0 0;
  font: 300 56px/1.04 var(--font-display); letter-spacing: -.026em; color: var(--ink);
  text-wrap: balance;
}
.bl-intro__text > .bl-intro__title:first-child { margin-top: 0; }
.bl-intro__sub {
  margin: 18px 0 0; max-width: 600px;
  font: 400 16.5px/1.6 var(--font-ui); color: var(--ink-soft);
  text-wrap: pretty;
}
.bl-intro__facts {
  margin: 16px 0 0;
  font: 400 14px/1.4 var(--font-ui); color: var(--bl-grey);
  font-variant-numeric: tabular-nums;
}
.bl-intro__aside { flex: none; padding-bottom: 4px; }
/* an author's page: the avatar beside the name, the topics they write in */
.bl-intro__who { display: flex; align-items: center; gap: 20px; margin-top: 18px; }
.bl-intro__who .bl-intro__title { margin: 0; }
.bl-av.bl-av--xl { width: 64px; height: 64px; font-size: 20px; }
.bl-intro__topics { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-top: 22px; }
.bl-intro__label { font: 400 14px/1.4 var(--font-ui); color: var(--bl-grey); }

.bl-crumbs ol {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font: 400 13.5px/1.2 var(--font-ui); color: var(--bl-grey);
}
.bl-crumbs li + li::before { content: "/"; margin-right: 8px; color: #c4c7ce; }
.bl-crumbs a { color: var(--bl-soft); transition: color .15s ease; }
.bl-crumbs a:hover { color: var(--ink-nav); }

.bl-more {
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 14.5px/1 var(--font-ui); color: var(--brand);
  white-space: nowrap;
}
.bl-more svg { width: 15px; height: 15px; transition: translate .2s cubic-bezier(.2, .8, .3, 1); }
.bl-more path, .bl-go path, .bl-pager__link path, .bl-share__btn path { stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.bl-more:hover svg { translate: 3px 0; }

.bl-row { position: relative; z-index: 1; border-bottom: 1px solid var(--rail); }
.bl-cells {
  max-width: var(--container); margin: 0 auto; padding: 0;
  list-style: none;
  display: grid; grid-template-columns: minmax(0, 1fr);
}
.bl-cells > * + * { border-left: 1px solid var(--rail); }
.bl-cell { position: relative; min-width: 0; margin: 0; padding: var(--bl-pad); }
.bl-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.bl-band { position: relative; z-index: 1; height: 112px; border-bottom: 1px solid var(--rail); }

.bl-head { position: relative; z-index: 1; padding: 56px 0 44px; border-bottom: 1px solid var(--rail); }
.bl-head__in { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px 48px; }
.bl-head__text { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; min-width: 0; }
.bl-head__title {
  margin: 0; max-width: 24ch;
  font: 300 44px/1.1 var(--font-display); letter-spacing: -.014em; color: var(--ink);
  text-wrap: balance;
}
.bl-head__sub { margin: 0; max-width: 600px; font: 400 16px/1.6 var(--font-ui); color: var(--ink-soft); text-wrap: pretty; }
.bl-head__aside { flex: none; padding-bottom: 6px; }

.bl-tray {
  position: relative; overflow: hidden;
  border-radius: 16px; background: var(--bl-tray);
  container-type: inline-size;
  transition: background-color .2s ease;
}
.bl-tray--card { height: 212px; }
.bl-tray--lead { height: 360px; }
.bl-tray--hero { height: 100%; min-height: 400px; }
.bl-tray--img img { display: block; width: 100%; height: 100%; object-fit: cover; }

.bl-tray.bl-art, .bl-post:hover .bl-tray.bl-art { background: none; }
.bl-art__in { position: absolute; inset: 0; }
.bl-art :is(.sk-frame, .sk-frame__in) { transition: border-color .2s ease; }
.bl-post:hover .bl-art :is(.sk-frame, .sk-frame__in) { border-color: #e2e3e8; }
:is(.bl-tray--lead, .bl-tray--hero) .fi-sk__art { zoom: 1.3; }
.bl-tray--lead.bl-art--quiz .fi-sk__art { zoom: 1; }
.bl-tray--hero.bl-art--quiz .fi-sk__art { zoom: 1.1; }

.bl-post { display: flex; flex-direction: column; }
.bl-meta {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin: 22px 0 0; min-height: 22px;
}
.bl-tag {
  position: relative; z-index: 2;
  display: inline-flex; align-items: center;
  padding: 4px 8px; border-radius: 6px;
  background: rgb(35 71 255 / .07); color: var(--brand);
  font: 500 12px/1.2 var(--font-ui); letter-spacing: -.002em; white-space: nowrap;
  transition: background-color .15s ease;
}
a.bl-tag:hover { background: rgb(35 71 255 / .13); }
.bl-date {
  margin-left: auto;
  font: 400 13px/1 var(--font-ui); color: var(--bl-grey);
  font-variant-numeric: tabular-nums; white-space: nowrap;
}

.bl-post__title {
  margin: 12px 0 0;
  font: 500 18px/1.35 var(--font-ui); letter-spacing: -.014em; color: var(--ink-nav);
  text-wrap: pretty;
}
.bl-post__title a, .bl-row-item__title a { color: inherit; outline: none; }
.bl-post__title a::after, .bl-row-item__title a::after { content: ""; position: absolute; inset: 0; }
.bl-post__title a:focus-visible::after, .bl-row-item__title a:focus-visible::after { outline: 2px solid var(--brand); outline-offset: -4px; border-radius: 4px; }
.bl-post__excerpt {
  margin: 8px 0 0;
  font: 400 14.5px/1.55 var(--font-ui); color: var(--bl-soft);
  display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; overflow: hidden;
  text-wrap: pretty;
}
.bl-post__read { margin: 14px 0 0; font: 400 13px/1.3 var(--font-ui); color: var(--bl-grey); }
.bl-post__foot {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: auto; padding-top: 20px;
}
.bl-post__info { font: 400 13px/1.3 var(--font-ui); color: var(--bl-grey); }
.bl-go {
  flex: none; width: 16px; height: 16px; color: #a1a6b0;
  transition: translate .2s cubic-bezier(.2, .8, .3, 1), color .15s ease;
}
.bl-post:hover .bl-tray { background: var(--bl-tray-hi); }
.bl-post:hover .bl-go, .bl-row-item:hover .bl-go { translate: 3px 0; color: var(--ink-nav); }

.bl-post--lead .bl-meta { margin-top: 26px; }
.bl-post--lead .bl-post__title {
  margin-top: 16px;
  font: 300 34px/1.14 var(--font-display); letter-spacing: -.018em; color: var(--ink);
  text-wrap: balance;
}
.bl-post--lead .bl-post__excerpt { margin-top: 12px; font-size: 16px; line-height: 1.6; color: var(--ink-soft); }
.bl-post--lead .bl-post__foot { padding-top: 24px; }

.bl-by { display: inline-flex; align-items: center; gap: 10px; min-width: 0; }
.bl-av {
  flex: none; display: grid; place-items: center; overflow: hidden;
  width: 32px; height: 32px; border-radius: 50%;
  background: #0f1115; color: #fff;
  font: 500 12px/1 var(--font-ui); letter-spacing: .02em;
}
.bl-av img { width: 100%; height: 100%; object-fit: cover; }
.bl-by__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.bl-by__name { font: 500 14px/1.25 var(--font-ui); color: var(--ink-nav); }
.bl-by__role { font: 400 13px/1.3 var(--font-ui); color: var(--bl-grey); }
.bl-by--md .bl-av { width: 36px; height: 36px; font-size: 13px; }
.bl-by--lg .bl-av { width: 48px; height: 48px; font-size: 15px; }
.bl-by--lg .bl-by__name { font-size: 16px; }
.bl-by--lg .bl-by__role { font-size: 14px; }
.bl-by--link .bl-by__name { transition: color .15s ease; }
.bl-by--link:hover .bl-by__name { color: var(--brand); }

.bl-top { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.bl-next {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-auto-rows: 1fr;
}
.bl-next > * + * { border-top: 1px solid var(--rail); }

.bl-row-item {
  position: relative;
  display: flex; flex-direction: column; justify-content: center;
  padding: 24px var(--bl-pad);
  transition: background-color .15s ease;
}
.bl-row-item:hover { background: var(--bl-tint); }
.bl-row-item .bl-meta { margin: 0; }
.bl-row-item__main { display: flex; align-items: flex-start; gap: 20px; margin-top: 12px; }
.bl-row-item__title {
  flex: 1; min-width: 0; margin: 0;
  font: 500 16.5px/1.4 var(--font-ui); letter-spacing: -.012em; color: var(--ink-nav);
  text-wrap: pretty;
}
.bl-row-item__main .bl-go { margin-top: 3px; }
.bl-row-item__snip {
  margin: 8px 0 0; max-width: 760px;
  font: 400 14.5px/1.55 var(--font-ui); color: var(--bl-soft);
}
.bl-list .bl-row-item__snip { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden; }
.bl-row-item__snip mark { padding: 0 2px; border-radius: 3px; background: rgb(35 71 255 / .1); color: var(--ink-nav); }

.bl-list { list-style: none; margin: 0 auto; padding: 0; }
.bl-list > * + * { border-left: 0; border-top: 1px solid var(--rail); }
.bl-list .bl-row-item { padding-block: 28px; }
.bl-list .bl-row-item__title { font-size: 18px; }

.bl-empty { padding: 56px var(--bl-pad) 64px; }
.bl-empty__title { margin: 0; font: 300 30px/1.2 var(--font-display); letter-spacing: -.012em; color: var(--ink); }
.bl-empty__text { margin: 12px 0 0; max-width: 520px; font: 400 15.5px/1.6 var(--font-ui); color: var(--bl-soft); }
.bl-empty .bl-more { margin-top: 20px; }

.bl-topics__cells { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.bl-topics__copy { padding-block: 48px; }
.bl-topics__title {
  margin: 14px 0 0;
  font: 300 32px/1.15 var(--font-display); letter-spacing: -.014em; color: var(--ink);
}
.bl-topics__sub { margin: 12px 0 0; max-width: 380px; font: 400 15px/1.6 var(--font-ui); color: var(--bl-soft); text-wrap: pretty; }
.bl-topics__list { display: flex; flex-direction: column; justify-content: center; align-items: flex-start; gap: 22px; padding-block: 48px; }

.bl-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.bl-chip {
  display: inline-flex; align-items: center; gap: 8px;
  height: 36px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--bl-line); background: var(--surface);
  font: 500 14px/1 var(--font-ui); letter-spacing: -.006em; color: var(--ink-nav);
  white-space: nowrap;
  transition: background-color .15s ease, border-color .15s ease;
}
.bl-chip:hover { background: var(--bl-tint); border-color: #dcdee3; }
.bl-chip__n { font: 400 13px/1 var(--font-ui); color: #9aa0ab; font-variant-numeric: tabular-nums; }
.bl-chip[aria-current="page"] { background: var(--ink-nav); border-color: var(--ink-nav); color: #fff; }
.bl-chip[aria-current="page"] .bl-chip__n { color: rgb(255 255 255 / .6); }

.bl-tabs { position: relative; z-index: 1; border-bottom: 1px solid var(--rail); }
.bl-tabs__list {
  list-style: none; margin: 0; padding: 14px 0;
  display: flex; gap: 6px;
  overflow-x: auto; scrollbar-width: none;
}
.bl-tabs__list::-webkit-scrollbar { display: none; }
.bl-tab {
  display: inline-flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 14px; border-radius: 999px;
  background: var(--bl-tray);
  font: 500 14px/1 var(--font-ui); letter-spacing: -.006em; color: #5f6571;
  white-space: nowrap;
  transition: background-color .15s ease, color .15s ease;
}
.bl-tab:hover { background: var(--bl-tray-hi); color: var(--ink-nav); }
.bl-tab:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.bl-tab__n { font: 400 12.5px/1 var(--font-ui); color: #a1a6b0; font-variant-numeric: tabular-nums; }
.bl-tabbed .bl-tab[aria-selected="true"] { background: var(--ink-nav); color: #fff; }
.bl-tabbed .bl-tab[aria-selected="true"] .bl-tab__n { color: rgb(255 255 255 / .6); }

.bl-panel__head { position: relative; z-index: 1; padding: 36px 0 28px; border-bottom: 1px solid var(--rail); }
.bl-panel__name { margin: 0; font: 300 28px/1.2 var(--font-display); letter-spacing: -.012em; color: var(--ink); }
.bl-panel__more { position: relative; z-index: 1; padding: 22px 0; border-bottom: 1px solid var(--rail); }
.bl-js .bl-panel__head { display: none; }
.bl-js .bl-tabbed .bl-panel:not(.is-active) { display: none; }

.bl-posthero { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); }
.bl-posthero__copy { display: flex; flex-direction: column; padding: 48px 48px 48px var(--bl-pad); }
.bl-posthero__copy .bl-meta { justify-content: flex-start; margin-top: 28px; }
.bl-posthero__copy .bl-date { margin-left: 4px; }
.bl-posthero__title {
  margin: 18px 0 0;
  font: 300 46px/1.08 var(--font-display); letter-spacing: -.024em; color: var(--ink);
  text-wrap: balance;
}
.bl-posthero__excerpt { margin: 18px 0 0; max-width: 560px; font: 400 17px/1.6 var(--font-ui); color: var(--ink-soft); text-wrap: pretty; }
.bl-posthero__facts { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 20px; margin-top: auto; padding-top: 32px; }
.bl-posthero__read { margin-left: auto; font: 400 14px/1.3 var(--font-ui); color: var(--bl-grey); }
.bl-posthero__art { padding: var(--bl-pad); }
/* a featured image, most of them wide (after blog.hubspot.com's posts):
   the copy left, the image right, whole, centred on a tray of white and
   grey glass (glass.js look daySlate, quiet; a gradient until it draws),
   so the two cells share a height whatever the image's shape */
.bl-posthero--img { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.bl-posthero--img .bl-posthero__art { position: relative; isolation: isolate; }
.bl-posthero--img .bl-posthero__art::before {
  content: ""; position: absolute; z-index: -2; inset: var(--bl-pad);
  border-radius: 16px;
  background: radial-gradient(60% 60% at 50% 50%, #e3e7ee 0%, rgb(227 231 238 / 0) 75%), #f7f8fa;
}
.bl-posthero__glass {
  inset: var(--bl-pad) auto auto var(--bl-pad);
  width: calc(100% - var(--bl-pad) * 2); height: calc(100% - var(--bl-pad) * 2);
  border-radius: 16px;
}
.bl-posthero--img .bl-tray--hero {
  display: grid; place-items: center; padding: 28px;
  background: none; box-shadow: inset 0 0 0 1px rgb(11 13 18 / .06);
}
.bl-posthero--img .bl-tray--img img {
  width: auto; height: auto; max-width: 100%; max-height: 100%;
  border-radius: 10px;
  box-shadow: 0 0 0 1px rgb(255 255 255 / .7), 0 24px 48px -26px rgb(11 13 18 / .4);
}
.bl-preview {
  align-self: flex-start; margin-bottom: 14px; padding: 4px 8px; border-radius: 6px;
  background: #fff4e5; color: #b45309; font: 500 12px/1.2 var(--font-ui);
}

.bl-article { grid-template-columns: 296px minmax(0, 1fr); }
.bl-aside { padding: 48px 28px 48px var(--bl-pad); }
/* a column of a fixed size: the list takes what the share row and the
   promo leave, and scrolls inside its own window */
.bl-aside__in {
  position: sticky; top: 96px;
  display: flex; flex-direction: column;
  max-height: calc(100vh - 120px);
}

/* "On this page": the h2s and h3s on a dotted path (blog.js draws it), a
   paper plane flying down it as the post is read, solid behind, dotted
   ahead. One line a title, cut with a fade; the window fades at an edge
   with more past it. Without JS, the list with a dot a title. */
@property --bl-fade-top { syntax: "<length>"; inherits: false; initial-value: 0px; }
@property --bl-fade-end { syntax: "<length>"; inherits: false; initial-value: 0px; }
@property --bl-cut-l { syntax: "<length>"; inherits: false; initial-value: 0px; }
@property --bl-cut-r { syntax: "<length>"; inherits: false; initial-value: 0px; }

.bl-toc--wide { display: flex; flex-direction: column; flex: 0 1 auto; min-height: 0; }
.bl-toc--wide > .eyebrow { flex: none; }
.bl-toc__view {
  position: relative; flex: 0 1 auto; min-height: 96px; max-height: 432px;
  margin: 10px -4px 0 -6px; padding: 4px 4px 4px 6px;
  overflow-y: auto; overscroll-behavior: contain; scrollbar-width: none;
  -webkit-mask-image: linear-gradient(transparent, #000 var(--bl-fade-top), #000 calc(100% - var(--bl-fade-end)), transparent);
  mask-image: linear-gradient(transparent, #000 var(--bl-fade-top), #000 calc(100% - var(--bl-fade-end)), transparent);
  transition: --bl-fade-top .25s ease, --bl-fade-end .25s ease;
}
.bl-toc__view::-webkit-scrollbar { display: none; }
.bl-toc__view.is-more-up { --bl-fade-top: 36px; }
.bl-toc__view.is-more-down { --bl-fade-end: 36px; }
.bl-toc--wide ol { list-style: none; margin: 0; padding: 0; }
.bl-toc--wide a {
  position: relative; display: block; padding: 5px 0 5px 22px; border-radius: 6px;
  font: 400 14px/20px var(--font-ui); letter-spacing: -.003em; color: #7d818c;
  transition: color .2s ease;
}
.bl-toc--wide .is-h3 a { padding-left: 34px; font-size: 13.5px; }
.bl-toc--wide a:hover, .bl-toc--wide a[aria-current] { color: var(--ink-nav); }
.bl-toc--wide a:focus-visible { outline: 2px solid var(--brand); outline-offset: -2px; }
.bl-toc--wide a::before {
  content: ""; position: absolute; top: 50%; left: 1px;
  width: 6px; height: 6px; margin-top: -3px; box-sizing: border-box;
  border: 1.25px solid #c6c9d0; border-radius: 50%; background: var(--surface);
}
.bl-toc--wide .is-h3 a::before { left: 13px; }
.bl-toc--wide.is-live a::before { content: none; }

.bl-toc__t { display: block; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.is-live .bl-toc__t { text-overflow: clip; }
.is-live .bl-toc__t > span { display: inline-block; vertical-align: top; transition: translate .35s cubic-bezier(.3, .7, .4, 1); }
.is-live .bl-toc__t.is-cut {
  --bl-cut-r: 32px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 var(--bl-cut-l), #000 calc(100% - var(--bl-cut-r)), transparent);
  mask-image: linear-gradient(90deg, transparent, #000 var(--bl-cut-l), #000 calc(100% - var(--bl-cut-r)), transparent);
  transition: --bl-cut-l .3s ease, --bl-cut-r .3s ease;
}
/* a cut title slides to show its end while pointed at */
.is-live a:is(:hover, :focus-visible) .bl-toc__t.is-cut { --bl-cut-l: 20px; --bl-cut-r: 0px; }
.is-live a:is(:hover, :focus-visible) .bl-toc__t.is-cut > span {
  translate: calc(var(--bl-cut, 0px) * -1) 0;
  transition: translate var(--bl-slide, 1s) cubic-bezier(.45, 0, .55, 1) .2s;
}

.bl-toc__svg { position: absolute; top: 0; left: 0; overflow: visible; pointer-events: none; }
.bl-toc__track { fill: none; stroke: #c3c7cf; stroke-width: 1.5; stroke-linecap: round; stroke-dasharray: 0 4.5; }
/* the path flown and the titles passed in a light blue; the strong blue is
   the plane's and the dot of the title it's on */
.bl-toc__trail { fill: none; stroke: #9aadff; stroke-width: 1.5; stroke-linecap: round; stroke-dasharray: 0 100000; }
.bl-toc__dot { fill: var(--surface); stroke: #c3c7cf; stroke-width: 1.25; transition: fill .25s ease, stroke .25s ease; }
.bl-toc__dot.is-on { fill: #9aadff; stroke: #9aadff; }
.bl-toc__dot.is-at { fill: var(--brand); stroke: var(--brand); }
.bl-toc__plane .is-near { fill: var(--brand); }
.bl-toc__plane .is-far { fill: #1530c4; }

.bl-toc--narrow { display: none; }
.bl-toc__summary {
  display: flex; align-items: center; gap: 10px;
  height: 44px; padding: 0 14px; border-radius: 10px;
  background: var(--bl-tray); cursor: pointer; list-style: none;
  font: 500 14.5px/1 var(--font-ui); color: var(--ink-nav);
}
.bl-toc__summary::-webkit-details-marker { display: none; }
.bl-toc__summary::after {
  content: ""; width: 7px; height: 7px; margin: -3px 2px 0 auto;
  border-right: 1.5px solid #8b8f9a; border-bottom: 1.5px solid #8b8f9a;
  rotate: 45deg; transition: rotate .2s ease, margin .2s ease;
}
.bl-toc--narrow[open] .bl-toc__summary::after { rotate: 225deg; margin-top: 3px; }
.bl-toc__n { font: 400 13px/1 var(--font-ui); color: var(--bl-grey); }
.bl-toc--narrow ol { list-style: none; display: grid; gap: 1px; margin: 8px 0 0; padding-left: 14px; }
.bl-toc--narrow a {
  display: block; margin-left: -10px; padding: 7px 10px; border-radius: 8px;
  font: 400 14px/1.4 var(--font-ui); color: #5f6571;
  transition: background-color .15s ease, color .15s ease;
}
.bl-toc--narrow a:hover { background: var(--bl-tint); color: var(--ink-nav); }
.bl-share { flex: none; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--bl-line); }
.bl-toc + .bl-share:first-child, .bl-aside__in > .bl-share:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.bl-share__list { list-style: none; margin: 14px 0 0; padding: 0; display: flex; gap: 6px; }
.bl-share__btn {
  position: relative; display: grid; place-items: center;
  width: 36px; height: 36px; padding: 0; border-radius: 9px;
  border: 1px solid var(--bl-line); background: var(--surface); color: #5f6571;
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease;
}
.bl-share__btn:hover { background: var(--bl-tint); color: var(--ink-nav); }
.bl-share__btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.bl-share__btn svg { width: 16px; height: 16px; }
.bl-share__btn .is-fill { fill: currentColor; stroke: none; }
.bl-share__btn[hidden] { display: none; }
.bl-share__btn .bl-share__ok { display: none; color: #16a34a; }
.bl-share__btn.is-copied .bl-share__ok { display: block; }
.bl-share__btn.is-copied .bl-share__link { display: none; }
.bl-share__note { min-height: 18px; margin: 10px 0 0; font: 400 13px/1.4 var(--font-ui); color: var(--bl-soft); }

/* the promo under them: black on the graphite glass (glass.js look card,
   the gradient standing in until it draws), white copy, one button */
.bl-promo {
  position: relative; z-index: 0; isolation: isolate; overflow: hidden; flex: none;
  margin-top: 8px; padding: 22px 18px 18px;
  border-radius: 16px;
  background: radial-gradient(95% 62% at 50% 108%, #5b6478 0%, rgb(91 100 120 / 0) 72%), #0b0c10;
}
.bl-promo::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  border-radius: inherit;
  background-image: var(--grain); background-size: 200px 200px;
  opacity: .2; mix-blend-mode: overlay;
}
.bl-promo .fl-glass { z-index: -2; }
.bl-promo__title {
  margin: 0;
  font: 300 21px/1.2 var(--font-display); letter-spacing: -.014em; color: #fff;
}
.bl-promo__title span { display: block; color: rgb(255 255 255 / .5); }
.bl-promo__sub { margin: 10px 0 0; font: 400 13.5px/1.5 var(--font-ui); color: rgb(255 255 255 / .68); text-wrap: pretty; }
.bl-promo .bl-promo__go {
  width: 100%; margin-top: 18px;
  background: #fff; color: var(--ink-nav);
  box-shadow: 0 1px 2px rgb(0 0 0 / .2), 0 10px 24px -10px rgb(0 0 0 / .7);
}
.bl-promo .bl-promo__go:hover { background: #eef0f3; }
.bl-promo .bl-promo__go:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

/* a short screen keeps the list and drops the promo */
@media (max-height: 700px) {
  .bl-promo { display: none; }
}

.bl-body { padding: 56px var(--bl-pad) 80px 72px; }

.bl-prose {
  max-width: 680px;
  font: 400 17px/1.72 var(--font-ui); color: #2b2f36;
  overflow-wrap: break-word;
}
.bl-prose > :first-child { margin-top: 0; }
.bl-prose :is(p, ul, ol, figure, pre, table, blockquote) { margin: 0 0 22px; }
.bl-prose h2 {
  margin: 56px 0 16px; scroll-margin-top: 88px;
  font: 400 30px/1.2 var(--font-display); letter-spacing: -.016em; color: var(--ink);
  text-wrap: balance;
}
.bl-prose h3 {
  margin: 36px 0 12px; scroll-margin-top: 88px;
  font: 600 19px/1.4 var(--font-ui); letter-spacing: -.012em; color: var(--ink-nav);
}
.bl-prose [tabindex="-1"]:focus { outline: none; }
.bl-prose h4 { margin: 28px 0 10px; font: 600 17px/1.45 var(--font-ui); color: var(--ink-nav); }
.bl-prose :is(h5, h6) { margin: 24px 0 8px; font: 600 15.5px/1.45 var(--font-ui); color: var(--ink-nav); }
.bl-prose :is(h2, h3, h4) + :is(h2, h3, h4) { margin-top: 0; }
.bl-prose strong { font-weight: 600; color: var(--ink-nav); }
.bl-prose a {
  color: var(--brand);
  text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px;
  text-decoration-color: rgb(35 71 255 / .35);
  transition: text-decoration-color .15s ease, color .15s ease;
}
.bl-prose a:hover { color: var(--brand-hi); text-decoration-color: currentColor; }
.bl-prose :is(ul, ol) { padding-left: 1.35em; }
.bl-prose li { margin: 0 0 8px; padding-left: 4px; }
.bl-prose li > :is(ul, ol) { margin: 8px 0 0; }
.bl-prose li::marker { color: #9aa0ab; }
.bl-prose ol > li::marker { font-variant-numeric: tabular-nums; }
.bl-prose blockquote {
  margin-inline: 0; padding: 2px 0 2px 22px;
  border-left: 2px solid var(--brand);
  font: 300 22px/1.45 var(--font-display); letter-spacing: -.008em; color: var(--ink);
}
.bl-prose blockquote p { margin: 0 0 12px; }
.bl-prose blockquote p:last-child { margin-bottom: 0; }
.bl-prose :not(pre) > code {
  padding: 2px 6px; border-radius: 5px; background: #f1f2f5;
  font: 400 .86em/1 ui-monospace, "SF Mono", Menlo, Consolas, monospace; color: var(--ink-nav);
}
.bl-prose pre {
  overflow-x: auto; padding: 18px 20px; border-radius: 12px;
  border: 1px solid var(--bl-line); background: var(--bl-tray);
  font: 400 14px/1.6 ui-monospace, "SF Mono", Menlo, Consolas, monospace; color: var(--ink-nav);
}
.bl-prose pre code { background: none; padding: 0; font: inherit; }
.bl-prose:not(#_) .emdash-code { margin: 0 0 22px; overflow: hidden; border: 1px solid var(--bl-line); border-radius: 12px; background: var(--bl-tray); }
.bl-prose:not(#_) .emdash-code-filename {
  padding: 11px 16px; border-radius: 0; border-bottom: 1px solid var(--bl-line);
  background: var(--surface);
  font: 500 11.5px/1 var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--bl-grey);
}
.bl-prose:not(#_) .emdash-code pre { margin: 0; padding: 16px 18px; border: 0; border-radius: 0; background: none; white-space: pre-wrap; overflow-wrap: anywhere; }
.bl-prose:not(#_) .emdash-code code { font: 400 13.5px/1.65 ui-monospace, "SF Mono", Menlo, Consolas, monospace; color: var(--ink-nav); }
.bl-prose img { display: block; max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--bl-line); }
.bl-prose figure { margin-inline: 0; }
.bl-prose figcaption { margin-top: 10px; font: 400 13.5px/1.5 var(--font-ui); color: var(--bl-grey); }
.bl-prose hr { margin: 40px 0; border: 0; border-top: 1px solid var(--bl-line); }
.bl-prose table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.5; font-variant-numeric: tabular-nums; }
.bl-prose :is(th, td) { padding: 10px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid #eceef1; }
.bl-prose th { font-weight: 600; color: var(--ink-nav); border-bottom-color: var(--bl-line); }
.bl-prose .has-text-align-center { text-align: center; }
.bl-prose .has-text-align-right { text-align: right; }
.bl-prose :has(> table) { overflow-x: auto; }
.bl-prose:not(#_) .emdash-table-wrapper { margin: 0 0 22px; border: 1px solid var(--bl-line); border-radius: 12px; }
.bl-prose:not(#_) .emdash-table { margin: 0; font-size: 14.5px; line-height: 1.5; }
.bl-prose:not(#_) .emdash-table :is(th, td) { padding: 11px 14px; border: 0; border-bottom: 1px solid #eceef1; vertical-align: top; }
.bl-prose:not(#_) .emdash-table th { background: var(--bl-tray); color: var(--ink-nav); font-weight: 600; border-bottom-color: var(--bl-line); }
.bl-prose:not(#_) .emdash-table :is(th, td) + :is(th, td) { border-left: 1px solid #f0f1f3; }
.bl-prose:not(#_) .emdash-table tbody tr { background: none; }
.bl-prose:not(#_) .emdash-table tbody tr:hover { background: var(--bl-tint); }
.bl-prose:not(#_) .emdash-table tbody tr:last-child td { border-bottom: 0; }
.bl-prose:not(#_) .emdash-table :is(th, td) p { margin: 0; }

.bl-try {
  display: flex; align-items: center; gap: 16px;
  max-width: 680px; margin: 40px 0;
  padding: 16px 16px 16px 18px; border-radius: 14px;
  background: var(--bl-tray);
}
.bl-try__mark { flex: none; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--brand); }
.bl-try__mark svg { width: 14px; fill: #fff; }
.bl-try__text { flex: 1; min-width: 0; }
.bl-try__title { display: block; font: 500 15.5px/1.3 var(--font-ui); color: var(--ink-nav); }
.bl-try__sub { display: block; margin-top: 3px; font: 400 14px/1.45 var(--font-ui); color: var(--bl-soft); }
.bl-try .btn { flex: none; }

.bl-author {
  display: flex; gap: 18px;
  max-width: 680px; margin-top: 56px; padding-top: 32px;
  border-top: 1px solid var(--bl-line);
}
.bl-author .eyebrow { margin-bottom: 14px; }
.bl-author__bio { margin: 14px 0 0; font: 400 15px/1.6 var(--font-ui); color: var(--bl-soft); }
.bl-author__more { display: flex; width: fit-content; margin-top: 18px; }

.bl-pager__in { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 16px; height: 72px; }
.bl-pager__link {
  display: inline-flex; align-items: center; gap: 8px; justify-self: end;
  font: 500 14.5px/1 var(--font-ui); color: var(--ink-nav);
  transition: color .15s ease;
}
.bl-pager__link--back { justify-self: start; }
.bl-pager__link svg { width: 15px; height: 15px; transition: translate .2s cubic-bezier(.2, .8, .3, 1); }
.bl-pager__link--back svg { rotate: 180deg; }
.bl-pager__link:hover { color: var(--brand); }
.bl-pager__link:hover svg { translate: 3px 0; }
.bl-pager__link--back:hover svg { translate: -3px 0; }
.bl-pager__at { font: 400 14px/1 var(--font-ui); color: var(--bl-grey); font-variant-numeric: tabular-nums; }

.bl-find { display: flex; gap: 8px; max-width: 560px; margin-top: 24px; }
.bl-find .bl-search__input { flex: 1; width: auto; height: 40px; font-size: 15px; }
.bl-find .bl-search { flex: 1; display: flex; }

.bl-close { padding-top: 112px; }

@media (max-width: 1100px) {
  .bl-bar__links { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent); padding-right: 24px; }
  .bl-article { grid-template-columns: 264px minmax(0, 1fr); }
  .bl-aside { padding-right: 24px; }
  .bl-body { padding-left: 48px; }
  .bl-tray--lead { height: 320px; }
  :is(.bl-tray--lead, .bl-tray--hero) .fi-sk__art { zoom: 1.15; }
  .bl-tray--lead.bl-art--quiz .fi-sk__art { zoom: 1; }
}

@media (max-width: 1023px) {
  .bl-article { grid-template-columns: minmax(0, 1fr); }
  .bl-article > * + * { border-left: 0; border-top: 1px solid var(--rail); }
  .bl-aside { padding: 24px var(--bl-pad); }
  .bl-aside__in { position: static; max-height: none; overflow: visible; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 18px; }
  .bl-toc--wide, .bl-promo { display: none; }
  .bl-toc--narrow { display: block; }
  .bl-share { display: flex; align-items: center; gap: 14px; margin-top: 0; padding-top: 0; border-top: 0; }
  .bl-share__list { margin: 0; }
  .bl-share__note { margin: 0; }
  .bl-body { padding: 44px var(--bl-pad) 64px; }
}

@media (max-width: 900px) {
  .bl { --bl-pad: 24px; }
  .bl-band { height: 96px; }
  .bl-intro { padding: 48px 0 40px; }
  .bl-intro__in { flex-direction: column; align-items: flex-start; }
  .bl-intro__title { font-size: 44px; }
  .bl-head { padding: 48px 0 36px; }
  .bl-head__in { flex-direction: column; align-items: flex-start; }
  .bl-head__title { font-size: 36px; }
  .bl-cells:is(.bl-grid, .bl-top, .bl-topics__cells, .bl-posthero) { grid-template-columns: minmax(0, 1fr); }
  .bl-cells:is(.bl-grid, .bl-top, .bl-topics__cells, .bl-posthero) > * + * { border-left: 0; border-top: 1px solid var(--rail); }
  .bl-tray--card { height: 232px; }
  .bl-tabs__list { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 32px), transparent); padding-right: 24px; }
  .bl-tray--hero { min-height: 300px; height: 300px; }
  .bl-posthero__copy { padding: 36px var(--bl-pad) 32px; }
  .bl-posthero__title { font-size: 38px; }
  /* stacked, the image takes the width at its own proportions */
  .bl-posthero--img .bl-tray--hero { height: auto; min-height: 0; padding: 0; background: none; }
  .bl-posthero--img .bl-tray--img img { width: 100%; max-height: none; border-radius: 14px; box-shadow: 0 0 0 1px rgb(11 13 18 / .05); }
  .bl-posthero__glass, .bl-posthero--img .bl-posthero__art::before { display: none; }
  .bl-posthero--img .bl-tray--hero { box-shadow: none; }
  .bl-topics__copy { padding-block: 40px 8px; }
  .bl-topics__cells > .bl-topics__list { border-top: 0; padding-block: 24px 40px; }
}

@media (max-width: 760px) {
  .bl-band { height: 72px; }
  .bl-search { display: none; }
  .bl-search__go { display: grid; }
  .bl-bar__in { gap: 14px; }
  .bl-try { flex-wrap: wrap; }
  .bl-try .btn { width: 100%; }
}

@media (max-width: 640px) {
  .bl { --bl-pad: 20px; }
  .bl-intro__title { font-size: 38px; }
  .bl-intro__who { gap: 14px; }
  .bl-av.bl-av--xl { width: 52px; height: 52px; font-size: 17px; }
  .bl-head__title { font-size: 32px; }
  .bl-tray--lead { height: 232px; }
  .bl-tray--hero { height: 232px; min-height: 0; }
  :is(.bl-tray--lead, .bl-tray--hero) .fi-sk__art { zoom: 1 !important; }
  .bl-tray--card { height: 212px; }
  .bl-post--lead .bl-post__title { font-size: 28px; }
  .bl-post__excerpt { -webkit-line-clamp: 2; }
  .bl-posthero__title { font-size: 34px; }
  .bl-prose { font-size: 16.5px; }
  .bl-prose h2 { font-size: 26px; margin-top: 44px; }
  .bl-author { flex-direction: column; gap: 14px; }
  .bl-pager__in { grid-template-columns: 1fr 1fr; height: auto; padding-block: 20px; }
  .bl-pager__at { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .bl-go, .bl-more svg, .bl-pager__link svg, .bl-tray, .bl-art :is(.sk-frame, .sk-frame__in) { transition: none; }
  .is-live .bl-toc__t > span, .bl-toc__dot { transition: none; }
  .is-live a:is(:hover, :focus-visible) .bl-toc__t.is-cut { --bl-cut-l: 0px; --bl-cut-r: 32px; }
  .is-live a:is(:hover, :focus-visible) .bl-toc__t.is-cut > span { translate: none; }
}

.bl-intro:has(> .gx) { padding: 12px 0 48px; }
.bl-intro > .gx { padding: 80px 0 72px; }
@media (max-width: 760px) {
  .bl-intro:has(> .gx) { padding: 8px 0 32px; }
  .bl-intro > .gx { padding: 48px 0 44px; }
}