/* Founders landing page (rootfox.cc/founders/).
   Built from docs/specs/2026-11-02-founders-landing.md - tokens (4), components (5), breakpoints (6), states (7). */

@font-face {
  font-family: "Orbit";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/rtf6x/fonts/Orbit-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* ground and surfaces - single dark ground, one raised surface, nothing else */
  --fl-bg: #0e0e0e;
  --fl-surface: #141414;
  --fl-wash: rgba(255, 255, 255, 0.04);

  /* text */
  --fl-fg: #f4f4f5;
  --fl-fg-strong: #ffffff;
  --fl-muted: #a1a1a6;
  --fl-dim: #8a8a90;

  /* rules */
  --fl-line: rgba(255, 255, 255, 0.10);
  --fl-line-strong: rgba(255, 255, 255, 0.20);
  --fl-rule: 1px solid var(--fl-line);
  --fl-rule-strong: 1px solid var(--fl-line-strong);

  /* accent - the only warm colour on the page */
  --fl-accent: #ff5e00;
  --fl-accent-hover: #ff7130;
  --fl-accent-press: #e85400;
  --fl-accent-ink: #14100c;
  --fl-accent-wash: rgba(255, 94, 0, 0.10);
  --fl-focus: #ffb057;

  /* type */
  --fl-font-display: "Orbit", ui-monospace, SFMono-Regular, Menlo, monospace;
  --fl-font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* 5.4vw is the steepest ramp at which "Skip the engineering circus." still fits one line
     at 768, and it reaches 55px at 1019 so the size never steps down as the window grows */
  --fl-fs-display: clamp(34px, 5.4vw, 55px);
  --fl-fs-cta: clamp(30px, 5vw, 52px);
  --fl-fs-h2: clamp(26px, 3.6vw, 40px);
  --fl-fs-h3: clamp(20px, 1.8vw, 23px);
  --fl-fs-quote: clamp(20px, 2vw, 26px);
  --fl-fs-lead: clamp(18px, 1.4vw, 20px);
  --fl-fs-body: 17px;
  --fl-fs-body-sm: 15px;
  --fl-fs-small: 14px;
  --fl-fs-metric: 17px;
  --fl-fs-label: 12px;
  --fl-fs-tag: 11px;

  --fl-lh-display: 1.03;
  --fl-lh-h2: 1.1;
  --fl-lh-h3: 1.25;
  --fl-lh-body: 1.62;

  /* spacing scale, 4px base */
  --fl-space-1: 4px;
  --fl-space-2: 8px;
  --fl-space-3: 12px;
  --fl-space-4: 16px;
  --fl-space-5: 24px;
  --fl-space-6: 32px;
  --fl-space-7: 48px;
  --fl-space-8: 64px;
  --fl-space-9: 96px;
  --fl-space-10: 128px;

  /* geometry */
  --fl-radius-xs: 2px;
  --fl-radius-sm: 4px;
  --fl-radius-md: 8px;
  --fl-container: 1120px;
  --fl-gutter: clamp(20px, 5vw, 48px);
  --fl-measure: 62ch;
  --fl-hit: 44px;

  /* motion */
  --fl-dur: 140ms;
  --fl-ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* reset */

*,
*::before,
*::after {
  box-sizing: border-box;
}

h1,
h2,
h3,
p,
figure,
blockquote,
ol,
ul {
  margin: 0;
  padding: 0;
}

h1,
h2,
h3 {
  font-weight: 400;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

/* 5.17 glue */

.fl-page {
  margin: 0;
  background: var(--fl-bg);
  color: var(--fl-fg);
  font: 400 var(--fl-fs-body) / var(--fl-lh-body) var(--fl-font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.fl-main {
  display: block;
  overflow-x: clip;
}

.fl-container {
  position: relative;
  width: 100%;
  max-width: var(--fl-container);
  margin-inline: auto;
  padding-inline: var(--fl-gutter);
}

.fl-sr {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
  padding: 0;
}

/* 5.2 skip link */

.fl-skip {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 30;
  padding: 12px 16px;
  background: var(--fl-surface);
  border: var(--fl-rule-strong);
  border-radius: var(--fl-radius-sm);
  font: 400 13px / 1 var(--fl-font-display);
  color: var(--fl-fg);
  text-decoration: none;
}

.fl-skip:focus {
  top: 12px;
}

/* 5.3 top bar */

.fl-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--fl-bg);
}

/* 4.3 - the bar's hairline spans the content column, like every other rule */
.fl-bar__inner::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: var(--fl-gutter);
  right: var(--fl-gutter);
  height: 1px;
  background: var(--fl-line);
}

.fl-bar__inner {
  display: flex;
  min-height: 64px;
  gap: var(--fl-space-4);
  align-items: center;
}

.fl-bar__brand {
  font-family: var(--fl-font-display);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--fl-fg-strong);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
}

.fl-bar__brand:hover {
  border-bottom-color: var(--fl-line-strong);
}

.fl-bar__brand-sub {
  font-family: var(--fl-font-display);
  font-size: 12px;
  letter-spacing: 0.10em;
  color: var(--fl-dim);
  margin-left: 8px;
}

.fl-bar__nav {
  flex: 1;
  min-width: 0;
}

.fl-bar__list {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 2.2vw, 28px);
  justify-content: flex-end;
  list-style: none;
  padding: 0;
}

.fl-bar__item {
  display: flex;
}

.fl-bar__link {
  display: inline-flex;
  align-items: center;
  min-height: var(--fl-hit);
  font-family: var(--fl-font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--fl-muted);
  text-decoration: none;
}

.fl-bar__link:hover {
  color: var(--fl-fg-strong);
}

/* 5.4 hero */

.fl-hero {
  position: relative;
  padding-block: 40px;
}

.fl-hero__inner {
  position: relative;
}

.fl-eyebrow {
  font-family: var(--fl-font-display);
  font-size: 12px;
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fl-accent);
}

.fl-hero__title {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-display);
  line-height: var(--fl-lh-display);
  letter-spacing: -0.02em;
  color: var(--fl-fg-strong);
  margin-top: var(--fl-space-4);
  /* 34ch, not 20ch: the sentence needs 16.05 times the font size on one line, and 20ch (12x)
     is narrower than that, so it forced the wrap of the last word */
  max-width: 34ch;
  overflow-wrap: normal;
  hyphens: none;
}

.fl-hero__lead {
  font-size: var(--fl-fs-lead);
  line-height: 1.5;
  color: var(--fl-muted);
  max-width: 54ch;
  margin-top: var(--fl-space-5);
}

.fl-hero__support {
  font-size: 17px;
  color: var(--fl-fg);
  max-width: 44ch;
  margin-top: var(--fl-space-4);
  border-left: var(--fl-rule-strong);
  padding-left: var(--fl-space-4);
}

.fl-hero__actions {
  margin-top: var(--fl-space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--fl-space-3) var(--fl-space-5);
}

.fl-hero__facts {
  margin-top: var(--fl-space-7);
  padding-top: var(--fl-space-4);
  border-top: var(--fl-rule);
  display: flex;
  flex-wrap: wrap;
  gap: var(--fl-space-2) var(--fl-space-5);
  list-style: none;
}

.fl-facts__item {
  display: flex;
  align-items: center;
  font-family: var(--fl-font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fl-dim);
}

/* the separator sits on the preceding item, so a wrapped row starts at the text edge */
.fl-facts__item:not(:last-child)::after {
  content: "";
  width: 1px;
  height: 10px;
  background: var(--fl-line-strong);
  margin-left: var(--fl-space-5);
}

/* 5.5 section frame */

.fl-section {
  --fl-sec-pad: clamp(56px, 8vw, 112px);
  --fl-sec-inset: var(--fl-gutter);
  padding-block: var(--fl-sec-pad);
}

/* 4.3 - section boundary rules span the content column, not the viewport */
.fl-section__grid::before {
  content: "";
  position: absolute;
  top: calc(-1 * var(--fl-sec-pad));
  left: var(--fl-sec-inset);
  right: var(--fl-gutter);
  height: 1px;
  background: var(--fl-line);
}

.fl-section__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--fl-space-5);
}

.fl-section__rail {
  display: flex;
  gap: var(--fl-space-3);
  align-items: baseline;
}

.fl-section__index {
  font-family: var(--fl-font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fl-accent);
}

.fl-section__label {
  font-family: var(--fl-font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--fl-dim);
}

.fl-section__body {
  min-width: 0;
  display: grid;
  gap: 0;
}

.fl-section__title {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h2);
  line-height: var(--fl-lh-h2);
  letter-spacing: -0.015em;
  color: var(--fl-fg-strong);
  max-width: 26ch;
}

.fl-section__lead {
  font-size: var(--fl-fs-lead);
  line-height: 1.5;
  color: var(--fl-muted);
  max-width: 56ch;
  margin-top: var(--fl-space-4);
}

/* 5.6 problems */

.fl-problems {
  margin-top: var(--fl-space-6);
  display: grid;
  gap: var(--fl-space-6);
}

.fl-problem {
  border-top: var(--fl-rule);
  padding-top: var(--fl-space-4);
}

.fl-problem__title {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h3);
  line-height: var(--fl-lh-h3);
  color: var(--fl-fg-strong);
  max-width: 22ch;
}

.fl-problem__text {
  font-size: var(--fl-fs-body-sm);
  line-height: 1.6;
  color: var(--fl-muted);
  margin-top: var(--fl-space-3);
  max-width: 34ch;
}

/* 5.7 list (capabilities, principles) */

.fl-list {
  list-style: none;
  margin: var(--fl-space-7) 0 0;
  padding: 0;
}

.fl-list__row {
  display: grid;
  gap: var(--fl-space-2);
  padding-block: var(--fl-space-5);
  border-top: var(--fl-rule);
}

.fl-list__row:last-child {
  border-bottom: var(--fl-rule);
}

.fl-list__num {
  font-family: var(--fl-font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fl-dim);
}

.fl-list__name {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h3);
  line-height: var(--fl-lh-h3);
  color: var(--fl-fg-strong);
}

.fl-list__text {
  font-size: var(--fl-fs-body-sm);
  line-height: 1.6;
  color: var(--fl-muted);
  max-width: 52ch;
}

/* 5.8 proof */

.fl-cases {
  margin-top: var(--fl-space-6);
}

.fl-case {
  padding-block: clamp(32px, 4vw, 48px);
  border-top: var(--fl-rule);
}

.fl-case:last-child {
  border-bottom: var(--fl-rule);
}

.fl-case__head {
  min-width: 0;
}

.fl-case__body {
  min-width: 0;
  padding-top: var(--fl-space-4);
}

.fl-case__name {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h3);
  line-height: 1.2;
  color: var(--fl-fg-strong);
}

.fl-case__metric {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-metric);
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--fl-fg-strong);
  margin-top: var(--fl-space-2);
  max-width: 30ch;
  text-wrap: balance;
}

.fl-case__copy {
  font-size: 17px;
  line-height: 1.6;
  color: var(--fl-fg);
  max-width: 58ch;
}

.fl-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--fl-space-2);
  margin: var(--fl-space-5) 0 0;
  padding: 0;
  list-style: none;
}

.fl-tag {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-tag);
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--fl-dim);
  border: var(--fl-rule);
  border-radius: var(--fl-radius-xs);
  padding: 5px 8px;
}

.fl-details {
  margin-top: var(--fl-space-5);
  border: var(--fl-rule);
  border-radius: var(--fl-radius-sm);
  background: var(--fl-surface);
}

.fl-details__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--fl-space-4);
  min-height: var(--fl-hit);
  padding: var(--fl-space-3) var(--fl-space-4);
  cursor: pointer;
  list-style: none;
}

.fl-details__summary::-webkit-details-marker {
  display: none;
}

.fl-details__summary:hover {
  background: var(--fl-wash);
}

.fl-details[open] .fl-details__summary {
  background: none;
}

.fl-details__label {
  font-family: var(--fl-font-display);
  font-size: 13px;
  line-height: 1.3;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--fl-fg);
  text-align: left;
}

.fl-details__icon {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  color: var(--fl-accent);
}

.fl-details__icon::before,
.fl-details__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform var(--fl-dur) var(--fl-ease);
}

.fl-details__icon::before {
  inset: 5px 0 auto;
  height: 1px;
}

.fl-details__icon::after {
  inset: 0 5px auto;
  width: 1px;
  height: 12px;
}

.fl-details[open] .fl-details__icon::after {
  transform: scaleY(0);
}

.fl-details__content {
  padding: 0 var(--fl-space-4) var(--fl-space-5);
  border-top: var(--fl-rule);
}

.fl-details__role {
  padding-top: var(--fl-space-4);
  font-family: var(--fl-font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--fl-dim);
}

.fl-bullets {
  margin: var(--fl-space-3) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--fl-space-2);
}

.fl-bullets__item {
  position: relative;
  padding-left: 18px;
  font-size: var(--fl-fs-body-sm);
  line-height: 1.6;
  color: var(--fl-muted);
}

.fl-bullets__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--fl-dim);
}

/* 5.9 method */

.fl-method {
  margin-top: var(--fl-space-6);
  display: grid;
  gap: var(--fl-space-7);
}

.fl-method__narrative {
  display: grid;
  gap: var(--fl-space-4);
  justify-items: start;
}

.fl-method__subhead {
  margin: 0;
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h3);
  line-height: var(--fl-lh-h3);
  color: var(--fl-fg-strong);
}

.fl-method + .fl-method__subhead {
  margin-top: var(--fl-space-7);
}

.fl-method__text {
  font-size: 17px;
  line-height: 1.62;
  color: var(--fl-fg);
  max-width: 58ch;
}

.fl-quote {
  border-left: 2px solid var(--fl-accent);
  padding-left: var(--fl-space-5);
  margin: var(--fl-space-4) 0 0;
}

.fl-quote__text {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-quote);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--fl-fg-strong);
  max-width: 34ch;
}

/* 5.10 decision flow */

.fl-flow {
  margin: 0;
  padding: 0;
  max-width: 520px;
}

.fl-flow__steps {
  display: grid;
  gap: var(--fl-space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.fl-flow__step {
  position: relative;
  max-width: 320px;
  padding: var(--fl-space-3) var(--fl-space-4);
  border: var(--fl-rule);
  border-radius: var(--fl-radius-sm);
  background: none;
  font: 400 13px / 1.4 var(--fl-font-display);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fl-fg);
}

.fl-flow__step--question {
  border-color: var(--fl-line-strong);
  color: var(--fl-fg-strong);
  max-width: 360px;
}

.fl-flow__step--branches {
  border: 0;
  padding: 0;
  max-width: none;
  text-transform: none;
  letter-spacing: 0;
}

.fl-flow__step + .fl-flow__step::before {
  content: "";
  position: absolute;
  left: var(--fl-space-4);
  top: calc(-1 * var(--fl-space-3));
  width: 1px;
  height: var(--fl-space-3);
  background: var(--fl-line-strong);
}

.fl-flow__branches {
  list-style: none;
  margin: var(--fl-space-2) 0 0;
  padding: 0;
  padding-left: var(--fl-space-4);
  display: grid;
  gap: var(--fl-space-2);
  border-left: 1px solid var(--fl-line-strong);
}

.fl-flow__branch {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--fl-space-2);
  font: 400 15px / 1.45 var(--fl-font-body);
}

.fl-flow__cond {
  font-family: var(--fl-font-display);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fl-dim);
  border: var(--fl-rule);
  border-radius: var(--fl-radius-xs);
  padding: 2px 6px;
}

.fl-flow__result {
  color: var(--fl-fg);
}

.fl-flow__caption {
  margin-top: var(--fl-space-4);
  max-width: 52ch;
  font-size: var(--fl-fs-small);
  line-height: 1.55;
  color: var(--fl-dim);
}

/* 5.11 formats */

.fl-formats {
  margin-top: var(--fl-space-6);
  display: grid;
  gap: var(--fl-space-5);
}

.fl-format {
  padding: clamp(20px, 3vw, 28px);
  border: var(--fl-rule);
  border-radius: var(--fl-radius-md);
  background: var(--fl-surface);
}

.fl-format__name {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h3);
  line-height: 1.2;
  color: var(--fl-fg-strong);
}

.fl-format__copy {
  font-size: 16px;
  line-height: 1.6;
  color: var(--fl-muted);
  margin-top: var(--fl-space-3);
  max-width: 36ch;
}

.fl-format__list {
  margin: var(--fl-space-5) 0 0;
  padding: var(--fl-space-4) 0 0;
  border-top: var(--fl-rule);
  list-style: none;
  display: grid;
  gap: var(--fl-space-2);
}

.fl-format__item {
  position: relative;
  padding-left: 16px;
  font-size: var(--fl-fs-body-sm);
  line-height: 1.5;
  color: var(--fl-fg);
}

.fl-format__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 1px;
  background: var(--fl-dim);
}

.fl-formats__note {
  margin-top: var(--fl-space-5);
  max-width: var(--fl-measure);
  font-size: var(--fl-fs-small);
  line-height: 1.6;
  color: var(--fl-dim);
}

/* 5.12 steps */

.fl-steps {
  margin-top: var(--fl-space-6);
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--fl-space-5);
}

.fl-step {
  position: relative;
  border-top: var(--fl-rule-strong);
  padding-top: var(--fl-space-5);
}

.fl-step::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--fl-accent);
}

.fl-step__num {
  font-family: var(--fl-font-display);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fl-dim);
}

.fl-step__name {
  font-family: var(--fl-font-display);
  font-size: var(--fl-fs-h3);
  line-height: var(--fl-lh-h3);
  color: var(--fl-fg-strong);
  margin-top: var(--fl-space-2);
}

.fl-step__text {
  font-size: var(--fl-fs-body-sm);
  line-height: 1.6;
  color: var(--fl-muted);
  margin-top: var(--fl-space-3);
  max-width: 34ch;
}

/* 5.13 about */

.fl-about {
  margin-top: var(--fl-space-6);
  display: grid;
  gap: var(--fl-space-6);
}

.fl-about__portrait {
  width: 100%;
  height: auto;
  max-width: 320px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center 35%;
  border: var(--fl-rule);
  border-radius: var(--fl-radius-md);
  filter: saturate(0.92) brightness(0.96);
}

.fl-about__text {
  font-size: 17px;
  line-height: 1.62;
  color: var(--fl-fg);
  max-width: 60ch;
}

.fl-about__links {
  margin: var(--fl-space-5) 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--fl-space-3) var(--fl-space-5);
}

.fl-about__link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-family: var(--fl-font-display);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fl-fg);
  text-decoration: none;
  border-bottom: 1px solid var(--fl-line-strong);
  padding-bottom: 3px;
}

.fl-about__link:hover {
  color: var(--fl-accent);
  border-bottom-color: var(--fl-accent);
}

.fl-about__awards {
  margin: var(--fl-space-5) 0 0;
  padding: var(--fl-space-4) 0 0;
  border-top: var(--fl-rule);
  list-style: none;
  display: grid;
  gap: var(--fl-space-2);
}

.fl-about__award {
  font-family: var(--fl-font-display);
  font-size: 12px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--fl-dim);
}

/* final CTA */

.fl-section--cta {
  --fl-sec-pad: clamp(64px, 8vw, 112px);
  padding-block: var(--fl-sec-pad);
}

.fl-section--cta .fl-section__grid::before {
  background: var(--fl-line-strong);
}

.fl-section--cta .fl-section__grid::after {
  content: "";
  position: absolute;
  bottom: calc(-1 * var(--fl-sec-pad));
  left: var(--fl-sec-inset);
  right: var(--fl-gutter);
  height: 1px;
  background: var(--fl-line-strong);
}

.fl-cta__title {
  font-size: var(--fl-fs-cta);
  line-height: 1.06;
  max-width: 22ch;
}

.fl-cta__copy {
  margin-top: var(--fl-space-4);
  max-width: 54ch;
  font-size: 17px;
  line-height: 1.6;
  color: var(--fl-muted);
}

.fl-cta__actions {
  margin-top: var(--fl-space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--fl-space-3) var(--fl-space-5);
}

/* 5.14 buttons */

.fl-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--fl-hit);
  padding: 0 var(--fl-space-5);
  border: 1px solid transparent;
  border-radius: var(--fl-radius-sm);
  font: 400 14px / 1 var(--fl-font-display);
  letter-spacing: 0.06em;
  text-align: center;
  white-space: nowrap;
  text-decoration: none;
  transition: background-color var(--fl-dur) var(--fl-ease), border-color var(--fl-dur) var(--fl-ease), color var(--fl-dur) var(--fl-ease);
}

.fl-btn--primary {
  background: var(--fl-accent);
  color: var(--fl-accent-ink);
}

.fl-btn--primary:hover {
  background: var(--fl-accent-hover);
}

.fl-btn--primary:active {
  background: var(--fl-accent-press);
}

.fl-btn--lg {
  min-height: 52px;
  padding: 0 var(--fl-space-6);
  font-size: 15px;
  letter-spacing: 0.05em;
}

.fl-btn--quiet {
  background: transparent;
  border-color: var(--fl-line-strong);
  color: var(--fl-fg);
}

.fl-btn--quiet:hover {
  border-color: var(--fl-fg);
  color: var(--fl-fg-strong);
}

.fl-btn--quiet:active {
  background: var(--fl-wash);
}

/* 5.15 footer */

.fl-footer {
  padding-block: var(--fl-space-6);
}

.fl-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--fl-space-3) var(--fl-space-5);
}

.fl-footer__meta {
  font-size: var(--fl-fs-small);
  line-height: 1.5;
  color: var(--fl-dim);
}

.fl-footer__link {
  font-family: var(--fl-font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--fl-fg);
  text-decoration: none;
  border-bottom: 1px solid var(--fl-accent);
  padding: 4px 0;
}

.fl-footer__link:hover {
  color: var(--fl-accent);
}

/* 4.5 focus ring */

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--fl-focus);
  outline-offset: 3px;
  border-radius: var(--fl-radius-xs);
}

/* 6. breakpoints */

@media (max-width: 767px) {
  .fl-bar {
    position: static;
  }

  .fl-bar__inner {
    flex-wrap: wrap;
    padding-block: var(--fl-space-2);
    row-gap: var(--fl-space-1);
  }

  .fl-bar__nav {
    flex: 1 1 100%;
  }

  .fl-bar__list {
    justify-content: flex-start;
    gap: var(--fl-space-2) var(--fl-space-5);
  }
}

@media (max-width: 479px) {
  .fl-footer__inner {
    justify-content: flex-start;
  }

  /* the primary label stays on one line inside the button */
  .fl-btn--lg {
    padding-inline: var(--fl-space-5);
    font-size: 13px;
    letter-spacing: 0.02em;
  }
}

@media (min-width: 768px) {
  .fl-hero {
    padding-block: clamp(56px, 9vh, 104px);
    min-height: min(640px, calc(100svh - 64px));
    display: flex;
    align-items: center;
  }

  .fl-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: var(--fl-space-6);
  }
}

@media (min-width: 900px) {
  .fl-problems {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: var(--fl-space-6);
    row-gap: var(--fl-space-6);
  }

  .fl-list--rows .fl-list__row {
    grid-template-columns: 40px 260px minmax(0, 1fr);
    column-gap: var(--fl-space-5);
    align-items: baseline;
  }

  .fl-list--plain .fl-list__row {
    grid-template-columns: 260px minmax(0, 1fr);
    column-gap: var(--fl-space-5);
    align-items: baseline;
  }

  .fl-formats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .fl-about {
    grid-template-columns: 280px minmax(0, 1fr);
    column-gap: var(--fl-space-7);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .fl-section {
    --fl-sec-inset: calc(var(--fl-gutter) + 180px + clamp(32px, 4vw, 64px));
  }

  .fl-section__grid {
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .fl-section__rail {
    flex-direction: column;
    gap: var(--fl-space-2);
  }

  .fl-case {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    column-gap: var(--fl-space-7);
    align-items: start;
  }

  .fl-case__body {
    padding-top: 0;
  }

  .fl-method {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    column-gap: var(--fl-space-8);
    align-items: start;
  }

  .fl-hero__inner {
    /* from here the hero's right padding replaces the container gutter (spec 5.4) */
    --fl-hero-pad-r: clamp(24px, 6vw, 96px);
    padding-right: var(--fl-hero-pad-r);
  }

  /* 4.3 - the facts rule spans the content column, not the hero's narrower text measure */
  .fl-hero__facts {
    margin-right: calc(var(--fl-gutter) - var(--fl-hero-pad-r));
  }

  .fl-hero__inner::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    right: var(--fl-gutter);
    width: 1px;
    background: var(--fl-line);
  }
}

@media (min-width: 1024px) {
  /* 55px / 34ch: the small form, so the H1 keeps two lines down to this edge; 58px is
     the widest it can be here and still fit "Skip the engineering circus." on one line */
  .fl-hero__title {
    font-size: 55px;
    max-width: 34ch;
  }
}

@media (min-width: 1120px) {
  /* 58px / 34ch keeps "Skip the engineering circus." on one line */
  .fl-hero__title {
    font-size: 58px;
    max-width: 34ch;
  }
}

/* 7. reduced motion */

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}