/* Blog — a standalone public content theme.
 *
 * Deliberately not part of the app's Tailwind bundle: the blog layout loads
 * this file and nothing else, so an article ships a small, budgeted stylesheet
 * with no Cable, auth-modal or checkout CSS in it (seo_plan.md Phase C).
 *
 * The look is the storefront's (home/_vpp_head): white ground, Golos Text for
 * display and body, cobalt for actions, and a yellow marker (<mark>, the
 * callout bar) reserved for what proves or stresses something. Class names
 * predate the look and are kept, so the calculator restyled with the rest.
 */

:root {
  --paper: #FFFFFF;
  --card: #F2F4F9;
  --card-alt: #F2F4F9;
  --ink: #0D1424;
  --ink-soft: #56607A;
  --ink-invert: #FFFFFF;
  --blue: #1F3FE0;
  --blue-dark: #1731B4;
  --hl: #FFE24D;
  --good: #0B7F58;
  --red: #B4410E;
  --rule: rgba(13, 20, 36, .16);
  --rule-soft: rgba(13, 20, 36, .08);
  --shell: 1120px;
  --sans: "Golos Text", system-ui, -apple-system, sans-serif;
  --display: "Golos Text", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }
::selection { background: var(--blue); color: #fff; }
img { max-width: 100%; height: auto; }
mark {
  background: var(--hl); color: var(--ink); padding: 0 .18em; border-radius: 3px;
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
}

.shell { max-width: var(--shell); margin: 0 auto; padding-left: 24px; padding-right: 24px; }

/* --- shared type ------------------------------------------------------- */
.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: .08em;
  text-transform: uppercase; color: var(--ink-soft); margin: 0 0 14px;
}
.kicker--alert { color: var(--blue); }
.kicker a { color: inherit; }
.kicker a:hover { color: var(--ink); }

.display {
  font-family: var(--display); font-weight: 700; line-height: 1.06;
  letter-spacing: -.03em; margin: 0 0 16px; text-wrap: balance;
}
.h1 { font-size: clamp(34px, 5.2vw, 56px); max-width: 18ch; }
.h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.12; letter-spacing: -.025em; }
.lede { font-size: 19px; color: var(--ink-soft); max-width: 56ch; margin: 0; }
.meta { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); }

.chip {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .02em;
  border-radius: 999px; padding: 7px 12px; color: var(--ink-soft);
  background: var(--card); display: inline-block; white-space: nowrap;
}
.chip b { color: var(--ink); font-weight: 600; margin-left: 4px; }
.chip--on { background: var(--ink); color: #fff; }
.chip--on b { color: var(--hl); }
.chip--alert { background: var(--hl); color: var(--ink); }
.chip--small { font-size: 11.5px; padding: 3px 8px; border-radius: 6px; text-transform: uppercase; letter-spacing: .04em; }

.btn {
  font-family: var(--sans); font-weight: 600; font-size: 15.5px;
  border: 1.5px solid var(--blue); background: var(--blue);
  color: #fff; padding: 13px 20px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  transition: background .15s, border-color .15s, transform .12s;
}
.btn:hover { background: var(--blue-dark); border-color: var(--blue-dark); color: #fff; transform: translateY(-1px); }
.btn--ghost { background: transparent; border-color: var(--rule); color: var(--ink); }
.btn--ghost:hover { background: transparent; border-color: var(--ink); color: var(--ink); }
.btn--marker { background: var(--hl); border-color: var(--hl); color: var(--ink); }
.btn--marker:hover { background: #F5D530; border-color: #F5D530; color: var(--ink); }
.btn--light { background: transparent; border-color: rgba(255, 255, 255, .45); color: #fff; }
.btn--light:hover { background: rgba(255, 255, 255, .08); border-color: #fff; color: #fff; }

.link-arrow { font-weight: 600; font-size: 15.5px; color: var(--blue); display: inline-flex; gap: 6px; align-items: center; }

.card { background: var(--card); border-radius: 20px; }
.card__bar {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 16px 22px 0; font-family: var(--mono); font-size: 12px;
  letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft);
}

/* --- chrome ------------------------------------------------------------ */
.site-head {
  position: sticky; top: 0; z-index: 20;
  background: var(--paper); border-bottom: 1px solid var(--rule-soft);
}
.site-head__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px;
}
.wordmark { font-weight: 700; font-size: 17px; letter-spacing: -.01em; color: var(--ink); }
.wordmark:hover { color: var(--ink); }
.site-nav { display: flex; gap: 22px; align-items: center; font-size: 15px; flex-wrap: wrap; }
.site-nav a { color: var(--ink-soft); }
.site-nav a:hover { color: var(--ink); }
.site-nav a.is-on { color: var(--ink); font-weight: 600; }
.site-nav a.is-cta { color: var(--blue); font-weight: 600; }

.site-foot { border-top: 1px solid var(--rule-soft); padding: 28px 0; font-size: 14px; color: var(--ink-soft); }
.site-foot__inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.site-foot a { color: var(--ink-soft); }
.site-foot a:hover { color: var(--blue); }
.site-foot__links { display: flex; gap: 18px; flex-wrap: wrap; }

/* --- index ------------------------------------------------------------- */
.masthead { padding-top: 48px; padding-bottom: 24px; }
.masthead .lede { margin-top: 4px; }
.filters { display: flex; gap: 8px; flex-wrap: wrap; padding-bottom: 32px; }

.feature {
  display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 36px;
  align-items: center; padding-bottom: 48px;
}
.feature__cover {
  aspect-ratio: 1200 / 560; border-radius: 20px; overflow: hidden; background: var(--card);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
}
.feature__cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
.feature__body { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.feature__body .kicker { margin: 0; }
.feature__title { font-weight: 700; font-size: clamp(26px, 3vw, 34px); line-height: 1.12; letter-spacing: -.025em; margin: 0; text-wrap: balance; }
.feature__title a { color: var(--ink); }
.feature__title a:hover { color: var(--blue); }
.feature__dek { font-size: 17px; color: var(--ink-soft); margin: 0; }
.feature__meta { display: flex; gap: 6px 14px; flex-wrap: wrap; font-size: 14px; color: var(--ink-soft); }
.feature__meta b { color: var(--ink); font-weight: 600; }
.feature__foot { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; padding-top: 4px; }

.paths { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; padding-bottom: 56px; }
.path { background: var(--card); border-radius: 20px; padding: 24px; display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.path .kicker { margin: 0; }
.path h3 { font-size: 21px; line-height: 1.25; font-weight: 700; letter-spacing: -.015em; margin: 0; text-wrap: balance; }
.path ol { margin: 0; padding: 0; list-style: none; counter-reset: n; }
.path li {
  counter-increment: n; display: grid; grid-template-columns: 26px minmax(0, 1fr) auto; gap: 10px;
  align-items: baseline; padding: 10px 0; border-top: 1px solid var(--rule-soft); font-size: 15.5px; line-height: 1.35;
}
.path li::before { content: counter(n); font-family: var(--mono); font-size: 12px; color: var(--blue); }
.path li a { color: var(--ink); }
.path li a:hover { color: var(--blue); }
.path li span { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); white-space: nowrap; }
.path__go { margin-top: auto; font-weight: 600; font-size: 15px; }

.archive { padding-bottom: 24px; }
.archive__head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin-bottom: 14px; flex-wrap: wrap; }
.archive__head .display { margin: 0; }
.archive__list { border-top: 1.5px solid var(--ink); }
.row {
  display: grid; grid-template-columns: 110px minmax(0, 1fr) auto; gap: 24px; align-items: baseline;
  padding: 20px 0; border-bottom: 1px solid var(--rule); color: var(--ink);
}
.row:hover { color: var(--ink); }
.row:hover .row__title { color: var(--blue); }
.row__date { font-family: var(--mono); font-size: 12.5px; color: var(--ink-soft); }
.row__title { font-size: 19px; line-height: 1.3; font-weight: 600; letter-spacing: -.01em; transition: color .15s; }
.row__dek { display: block; font-size: 15.5px; color: var(--ink-soft); margin-top: 4px; max-width: 70ch; }
.row__tag { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.row__tag .meta { white-space: nowrap; }

.tool {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center;
  background: var(--card); border-radius: 22px; padding: 28px; margin: 32px 0 16px;
}
.tool h2 { font-size: clamp(22px, 2.6vw, 26px); line-height: 1.2; font-weight: 700; letter-spacing: -.02em; margin: 0 0 6px; }
.tool p { color: var(--ink-soft); margin: 0; max-width: 56ch; }
.tool .kicker { margin-bottom: 8px; }

.band {
  background: var(--ink); color: #fff; border-radius: 22px; padding: 30px 28px; margin-bottom: 64px;
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px; align-items: center;
}
.band .kicker { color: #9BA6C2; margin-bottom: 8px; }
.band .display { color: #fff; font-size: clamp(22px, 2.8vw, 30px); line-height: 1.15; margin: 0 0 8px; }
.band p { color: #C3CADB; margin: 0; max-width: 58ch; font-size: 16px; }
.band__actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* --- article ----------------------------------------------------------- */
.crumbs { padding-top: 22px; font-family: var(--mono); font-size: 12.5px; color: var(--ink-soft); display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a { color: var(--ink-soft); }
.crumbs a:hover { color: var(--ink); }

.article-head { padding-top: 22px; padding-bottom: 36px; }
.article-head .display { font-size: clamp(32px, 5vw, 52px); line-height: 1.07; max-width: 22ch; margin-bottom: 16px; }
.article-head__lede { font-size: 20px; line-height: 1.5; color: var(--ink-soft); margin: 0 0 20px; max-width: 60ch; text-wrap: pretty; }
.byline { display: flex; gap: 10px 18px; flex-wrap: wrap; align-items: center; font-size: 14.5px; color: var(--ink-soft); }
.byline b { color: var(--ink); font-weight: 600; }
.byline__who { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 600; }
.byline__av {
  width: 34px; height: 34px; border-radius: 50%; background: var(--blue); color: #fff;
  display: grid; place-items: center; font-weight: 700; font-size: 14px;
}
.article-head__cover {
  width: 100%; height: auto; aspect-ratio: 1200 / 560; object-fit: cover;
  display: block; margin-top: 32px; border-radius: 20px;
}

.article-grid {
  padding-bottom: 64px; display: grid; grid-template-columns: minmax(0, 680px) minmax(0, 320px);
  gap: 64px; align-items: start; justify-content: space-between;
}

.toc { background: var(--card); border-radius: 18px; padding: 20px 22px; margin-bottom: 34px; }
.toc summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.toc summary::-webkit-details-marker { display: none; }
.toc summary::after { content: "–"; font-family: var(--mono); color: var(--ink-soft); }
.toc:not([open]) summary::after { content: "+"; }
.toc ol { margin: 12px 0 0; padding-left: 20px; font-size: 16px; line-height: 1.75; }
.toc a { color: var(--ink); }
.toc a:hover { color: var(--blue); }

/* Article prose. Every element the sanitizer allows is styled here, so a
   heading or table authored in Markdown never lands unstyled. */
.prose { font-size: 18px; line-height: 1.72; }
.prose > p { margin: 0 0 22px; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }
.prose h2 {
  font-weight: 700; font-size: clamp(24px, 3vw, 28px); line-height: 1.2; letter-spacing: -.02em;
  margin: 48px 0 16px; scroll-margin-top: 90px; text-wrap: balance;
}
.prose h3 { font-weight: 700; font-size: 21px; line-height: 1.3; letter-spacing: -.015em; margin: 32px 0 12px; scroll-margin-top: 90px; }
.prose ul, .prose ol { margin: 0 0 22px; padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--blue); }
.prose blockquote {
  border-left: 4px solid var(--hl); background: #FFFBE6; border-radius: 0 14px 14px 0;
  padding: 16px 20px; margin: 30px 0; font-size: 19px; line-height: 1.55; font-weight: 600;
}
.prose blockquote p { margin: 0; }
.prose blockquote p + p { margin-top: 10px; font-weight: 400; font-size: 17px; }
.prose code { font-family: var(--mono); font-size: .86em; background: var(--card); padding: 2px 6px; border-radius: 5px; }
.prose pre { font-family: var(--mono); font-size: 13px; background: var(--ink); color: #E9EDF7; padding: 18px 20px; border-radius: 14px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose hr { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }
.prose figure { margin: 0 0 12px; }
.prose img { border-radius: 14px; }
.prose figcaption { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); margin-top: 8px; }

/* Data tables carry the evidence: ruled, not boxed, and they scroll inside
   their own wrapper rather than widening the page. */
.prose table { width: 100%; border-collapse: collapse; font-size: 15.5px; line-height: 1.45; border-top: 1.5px solid var(--ink); margin: 0 0 12px; }
.prose thead th {
  text-align: left; padding: 12px 14px 12px 0; border-bottom: 1px solid var(--rule);
  font-family: var(--mono); font-size: 11.5px; color: var(--ink-soft); letter-spacing: .05em; text-transform: uppercase; font-weight: 400;
}
.prose tbody td { padding: 12px 14px 12px 0; border-bottom: 1px solid var(--rule-soft); vertical-align: top; font-variant-numeric: tabular-nums; }
.prose tbody td:first-child { font-weight: 600; }

.tool-card { background: var(--card); border-radius: 18px; padding: 24px; margin: 8px 0 30px; }
.tool-card .kicker { margin-bottom: 8px; }
.tool-card h3 { font-weight: 700; font-size: 21px; line-height: 1.25; letter-spacing: -.015em; margin: 0 0 6px; }
.tool-card p { font-size: 15.5px; color: var(--ink-soft); margin: 0 0 18px; max-width: 52ch; }

.colophon { border-top: 1px solid var(--rule); margin-top: 40px; padding-top: 22px; }
.colophon ul { margin: 0; padding-left: 18px; font-size: 15px; line-height: 1.8; color: var(--ink-soft); }
.colophon p { font-size: 14px; color: var(--ink-soft); }

.rail { position: sticky; top: 86px; display: flex; flex-direction: column; gap: 22px; }
.rail-card p.label, .offer .label {
  font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--ink-soft); margin: 0 0 10px;
}
.rail-card__links { display: flex; flex-direction: column; }
.rail-card__links a { color: var(--ink); font-size: 15px; line-height: 1.35; padding: 10px 0; border-top: 1px solid var(--rule-soft); }
.rail-card__links a:hover { color: var(--blue); }

.offer { border: 1.5px solid var(--ink); border-radius: 20px; padding: 22px; display: flex; flex-direction: column; }
.offer h3 { font-weight: 700; font-size: 21px; line-height: 1.2; letter-spacing: -.015em; margin: 0 0 8px; }
.offer p { font-size: 15px; line-height: 1.5; color: var(--ink-soft); margin: 0 0 16px; }
.offer__price { display: flex; align-items: baseline; gap: 10px; }
.offer__price b { font-weight: 800; font-size: 34px; letter-spacing: -.03em; color: var(--ink); }
.offer__price span { font-size: 14px; color: var(--ink-soft); }
.offer .btn { margin-top: 16px; width: 100%; }
.offer__note { font-size: 13px; color: var(--ink-soft); margin: 12px 0 0; text-align: center; }

/* --- calculator -------------------------------------------------------- */
.calc { display: grid; grid-template-columns: 1fr 1.15fr; gap: 24px; align-items: start; padding-bottom: 20px; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.calc__inputs { padding: 18px 22px 22px; display: flex; flex-direction: column; gap: 22px; }
.field__head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 8px; }
.field__head label { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-soft); }
.field__value { font-weight: 700; font-size: 20px; letter-spacing: -.02em; color: var(--ink); font-variant-numeric: tabular-nums; }
.field input[type="range"] { width: 100%; height: 22px; cursor: pointer; accent-color: var(--blue); }
.field__hint { font-size: 13px; color: var(--ink-soft); margin: 4px 0 0; }

.readout { background: var(--ink); color: #fff; border-radius: 20px; padding: 26px 24px; }
.readout .kicker { color: #9BA6C2; }
.readout__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 18px; }
.readout__figure { font-weight: 800; font-size: 40px; letter-spacing: -.03em; line-height: 1; color: #fff; font-variant-numeric: tabular-nums; }
.readout__figure.is-good { color: #6EE7B7; }
.readout__figure.is-bad { color: #FFB38A; }
.readout__label { font-size: 13px; color: #C3CADB; margin-top: 8px; }
.readout__verdict { margin-top: 22px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .2); font-size: 15px; color: #fff; }

.funnel__step { display: grid; grid-template-columns: 34px 1fr auto; gap: 16px; align-items: baseline; padding: 14px 22px; border-bottom: 1px solid var(--rule-soft); }
.funnel__step:last-child { border-bottom: 0; }
.funnel__no { font-family: var(--mono); font-size: 13px; color: var(--blue); }
.funnel__label { font-weight: 600; font-size: 16px; }
.funnel__formula { display: block; font-family: var(--mono); font-size: 12px; color: var(--ink-soft); margin-top: 3px; }
.funnel__value { font-weight: 700; font-size: 21px; letter-spacing: -.02em; color: var(--ink); font-variant-numeric: tabular-nums; }

.caveat { border-left: 4px solid var(--hl); background: #FFFBE6; border-radius: 0 14px 14px 0; padding: 14px 18px; }
.caveat p { font-size: 14px; color: var(--ink-soft); margin: 0; }

.save-strip { background: var(--card); border-radius: 22px; padding: 26px 24px; display: grid; grid-template-columns: 1.2fr auto; gap: 26px; align-items: center; }
.save-strip h3 { font-weight: 700; font-size: 22px; line-height: 1.2; letter-spacing: -.02em; margin: 0 0 8px; }
.save-strip p { font-size: 15.5px; color: var(--ink-soft); margin: 0; max-width: 52ch; }

/* --- responsive -------------------------------------------------------- */
@media (max-width: 900px) {
  .feature, .article-grid, .calc, .band, .tool, .save-strip { grid-template-columns: minmax(0, 1fr); }
  .feature { gap: 20px; }
  .article-grid { gap: 36px; }
  .rail { position: static; }
  .row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .row__tag { flex-direction: row; align-items: center; }
  .masthead { padding-top: 32px; }
  .site-nav a:not(.is-cta):not(.is-on) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .btn, .row__title { transition: none; }
  .btn:hover { transform: none; }
}

:where(a, button, input, summary, [tabindex]):focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

.table-scroll { overflow-x: auto; margin: 0 0 12px; }
.table-scroll table { min-width: 460px; margin: 0; }