/*
 * sectionrepeat.com
 *
 * Plain CSS, served as-is: no theme, no Sass, no third-party requests.
 * Red is used only where the extension itself uses it - section marks on the
 * progress bar - and for the one install button. Everything else is ink on
 * paper.
 */

@font-face {
  font-family: "Atkinson Hyperlegible Next";
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
  src: url("../fonts/atkinson-hyperlegible-next-latin-wght-normal.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 {
  color-scheme: light dark;
  --paper: #ffffff;
  --ink: #0f0f0f;
  --muted: #5f5f5f;
  --rule: #e5e5e5;
  --track: #e5e5e5;
  --mark: #ff0000;
  --mark-soft: #ffc4c4;
  --button: #cc0000;
  --button-hover: #a80000;
  --key-face: #ffffff;
  --key-edge: #cfcfcf;
  --key-base: #a9a9a9;
  --underline: #b5b5b5;

  --text: 1.125rem;
  --measure: 40rem;
  --wide: 60rem;
  --gutter: 1.25rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f0f0f;
    --ink: #f1f1f1;
    --muted: #aaaaaa;
    --rule: #2e2e2e;
    --track: #3a3a3a;
    --mark-soft: #6e2424;
    --key-face: #1f1f1f;
    --key-edge: #474747;
    --key-base: #606060;
    --underline: #6a6a6a;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Atkinson Hyperlegible Next", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: var(--text);
  line-height: 1.6;
  font-kerning: normal;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-color: var(--underline);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
  border-radius: 2px;
}

/* A key is drawn as a key, everywhere on the site. */
kbd {
  display: inline-block;
  min-width: 1.8em;
  padding: 0.08em 0.42em 0.02em;
  border: 1px solid var(--key-edge);
  border-bottom: 0.18em solid var(--key-base);
  border-radius: 0.32em;
  background: var(--key-face);
  color: var(--ink);
  font-family: inherit;
  font-size: 0.85em;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  vertical-align: 0.06em;
  white-space: nowrap;
}

code {
  padding: 0.1em 0.35em;
  border-radius: 0.3em;
  background: var(--rule);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.84em;
}

.wrap {
  width: 100%;
  max-width: calc(var(--wide) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  transform: translateY(-200%);
}

.skip:focus {
  transform: none;
}

/* Header */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  display: block;
  width: 2rem;
  height: 2rem;
  border-radius: 0.45rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  text-decoration-line: underline;
  text-decoration-color: currentColor;
}

/* Home: hero */

.hero {
  padding-top: clamp(2.5rem, 7vw, 5.5rem);
}

.hero h1 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2.5rem, 1.2rem + 5vw, 4.5rem);
  font-weight: 780;
  line-height: 1.02;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.lead {
  max-width: 36rem;
  margin: 1.75rem 0 0;
  font-size: clamp(1.1875rem, 1.05rem + 0.5vw, 1.3125rem);
  line-height: 1.55;
}

.get {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin: 2.25rem 0 0;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
  padding: 0 1.5rem;
  border-radius: 999px;
  background: var(--button);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: var(--button-hover);
}

.get-note {
  color: var(--muted);
  font-size: 0.9375rem;
}

/*
 * The progress bar: the one picture on the page, and the thing the extension
 * actually draws. S and E sit on the edges of the section they made; the
 * playhead runs to E and jumps back to S, which is what R does.
 */
.demo {
  position: relative;
  height: 9rem;
  margin-top: clamp(3rem, 7vw, 4.5rem);
}

.bar {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  height: 0.5rem;
  margin-top: -0.25rem;
  border-radius: 999px;
  background: var(--track);
}

.sec {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--from);
  width: calc(var(--to) - var(--from));
  background: var(--mark-soft);
}

.sec.is-active {
  background: var(--mark);
}

.head {
  position: absolute;
  top: 50%;
  left: 0;
  width: 1.125rem;
  height: 1.125rem;
  margin: -0.5625rem 0 0 -0.5625rem;
  border-radius: 50%;
  background: var(--mark);
  box-shadow: 0 0 0 0.1875rem var(--paper);
  animation: loop 3.2s linear infinite;
}

@keyframes loop {
  from { left: 0%; }
  to { left: 100%; }
}

.cue {
  position: absolute;
  left: var(--at);
  font-size: 1.25rem;
  transform: translateX(-50%);
}

.cue.above {
  top: 0;
}

.cue.below {
  bottom: 0;
}

.cue::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  height: 1.1rem;
  background: var(--key-base);
}

.cue.above::after {
  top: calc(100% + 0.3rem);
}

.cue.below::after {
  bottom: calc(100% + 0.25rem);
}

@media (prefers-reduced-motion: reduce) {
  .head {
    left: 30%;
    animation: none;
  }
}

/* Home: sections below the hero */

.block {
  max-width: var(--measure);
  margin-top: clamp(3.5rem, 8vw, 5rem);
}

.block h2,
.prose h2 {
  margin: 0 0 1.25rem;
  font-size: 1.625rem;
  font-weight: 720;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.block p {
  margin: 0;
}

.keys {
  margin: 0;
}

.keys > div {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding-block: 0.7rem;
  border-top: 1px solid var(--rule);
}

.keys > div:last-child {
  border-bottom: 1px solid var(--rule);
}

.keys dt,
.keys dd {
  margin: 0;
}

.keys kbd {
  font-size: 0.95em;
}

.note {
  margin-top: 1.25rem;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.block .note {
  margin-top: 1.25rem;
}

.facts {
  margin: 0;
  padding-left: 1.2em;
}

.facts li {
  padding-left: 0.2em;
}

.facts li + li {
  margin-top: 0.6rem;
}

.facts li::marker {
  color: var(--muted);
}

/* Text pages: privacy policy, release notes */

.prose > * {
  max-width: var(--measure);
}

.prose h1 {
  margin: clamp(2rem, 6vw, 4rem) 0 1.5rem;
  font-size: clamp(2.25rem, 1.6rem + 2.4vw, 3rem);
  font-weight: 780;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.prose h2 {
  margin-top: 3rem;
}

.prose h3 {
  margin: 2rem 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.35;
}

.prose p,
.prose ul {
  margin: 0 0 1rem;
}

.prose ul {
  padding-left: 1.2em;
}

.prose li + li {
  margin-top: 0.35rem;
}

.prose li::marker {
  color: var(--muted);
}

/* Footer */

.site-footer {
  margin-top: clamp(5rem, 11vw, 8rem);
  padding-block: 1.75rem 3rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-footer p {
  margin: 0;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.5rem;
}

.footer-row + .footer-row {
  margin-top: 0.5rem;
}

.site-footer .fine {
  max-width: var(--measure);
  margin-top: 1.25rem;
  font-size: 0.8125rem;
  line-height: 1.55;
}

@media (max-width: 40rem) {
  :root {
    --text: 1.0625rem;
  }

  .demo {
    height: 8rem;
  }

  .cue {
    font-size: 1.0625rem;
  }

  .cue::after {
    height: 0.85rem;
  }

  .keys > div {
    grid-template-columns: 5.75rem minmax(0, 1fr);
    gap: 0.75rem;
  }

  .site-nav {
    gap: 0.25rem 1rem;
    font-size: 0.9375rem;
  }
}