/*
 * getfmlens.com. It looks like the app: a dark plum masthead, violet for the main action, one typeface (Archivo,
 * condensed and heavy for headings, regular width for text), and FM's four rating bands as the only decoration.
 */
@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url("fonts/archivo-latin-wdth-normal.woff2") format("woff2-variations");
  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;
}

@font-face {
  font-family: "Archivo";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url("fonts/archivo-latin-ext-wdth-normal.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

:root {
  color-scheme: light dark;
  --page: #eef0f5;
  --text: #191b28;
  --muted: #586174;
  --rule: #d5d9e4;
  --strip: #251b37;
  --on-strip: #ffffff;
  --on-strip-muted: rgb(255 255 255 / 0.72);
  --accent: #8338c4;
  --accent-hover: #6f25b0;
  --link: #6f25b0;
  --focus: #2457c5;
  /* FM's bands for a 1-20 value: 1-5, 6-10, 11-15, 16-20. */
  --band-1: #b3402f;
  --band-2: #8f5d0e;
  --band-3: #5a761b;
  --band-4: #1f7547;
  --font: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  --wide: 1120px;
  --gutter: clamp(16px, 4vw, 40px);
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #11131f;
    --text: #f4f5fa;
    --muted: #a9b0c2;
    --rule: #2c3044;
    --link: #d29cf0;
    --focus: #8fb1ff;
    --band-1: #e8775f;
    --band-2: #dca244;
    --band-3: #a8c45e;
    --band-4: #57b784;
  }
}

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

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

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
}

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

a {
  color: var(--link);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

a,
button {
  touch-action: manipulation;
}

h1,
h2 {
  text-wrap: pretty;
}

[id] {
  scroll-margin-top: 16px;
}

/* Hidden until the keyboard reaches it, first thing on the page. */
.skip {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 1;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  transform: translateY(-150%);
}

.skip:focus-visible {
  transform: none;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  width: min(100% - 2 * var(--gutter), var(--wide));
  margin-inline: auto;
}

/* The masthead: the brand, as in the app, and the way to the source. */
.masthead {
  background: var(--strip);
  color: var(--on-strip);
}

.masthead :focus-visible {
  outline-color: #8fb1ff;
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand img {
  width: 40px;
  height: 40px;
  padding: 3px;
  border-radius: 8px;
  background: #f6f7f9;
}

.brand span {
  font-size: 1.5rem;
  font-stretch: 72%;
  font-weight: 850;
  line-height: 1;
  letter-spacing: 0.02em;
}

.bar nav {
  display: flex;
  gap: 20px;
  font-stretch: 88%;
  font-weight: 700;
}

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

.bar nav a:hover {
  color: var(--on-strip);
  box-shadow: inset 0 -2px 0 #c86ee6;
}

/* The hero: what FM Lens is, the download, and the app itself breaking out of the masthead onto the page. */
.hero {
  --overlap: clamp(48px, 12vw, 180px);
  position: relative;
  padding-top: clamp(32px, 7vw, 88px);
  /* FM's four bands along the foot of the masthead, behind the screenshot. */
  border-bottom: 8px solid;
  border-image: linear-gradient(90deg, var(--band-1) 0 25%, var(--band-2) 25% 50%, var(--band-3) 50% 75%, var(--band-4) 75%) 1;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 1.4rem + 2.6vw, 3.5rem);
  font-stretch: 72%;
  font-weight: 850;
  line-height: 1.02;
}

.hero .lead {
  margin: 16px 0 0;
  color: var(--on-strip-muted);
  font-size: clamp(1.0625rem, 1rem + 0.4vw, 1.25rem);
  line-height: 1.55;
}

.get {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 26px;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-size: 1.125rem;
  font-stretch: 88%;
  font-weight: 750;
  text-decoration: none;
}

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

.button svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.get p {
  margin: 0;
  color: var(--on-strip-muted);
  font-size: 0.9375rem;
}

.shot {
  position: relative;
  margin-top: clamp(40px, 6vw, 72px);
  margin-bottom: calc(-1 * var(--overlap));
}

.shot img {
  width: 100%;
  border: 1px solid rgb(37 27 55 / 0.16);
  border-radius: 12px;
  box-shadow: 0 24px 60px -24px rgb(37 27 55 / 0.55);
}

/* The page under the masthead: one column of headings beside their content. On the home page it starts below the
   screenshot that hangs out of the masthead. */
.masthead:has(.shot) + main {
  padding-top: calc(clamp(48px, 12vw, 180px) + clamp(56px, 8vw, 104px));
}

.part {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  gap: 16px clamp(24px, 5vw, 72px);
  padding-block: clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--rule);
}

.part:first-child {
  border-top: 0;
  padding-top: 0;
}

.part h2 {
  margin: 0;
  font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.5rem);
  font-stretch: 70%;
  font-weight: 850;
  line-height: 1;
}

.features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px clamp(24px, 4vw, 48px);
  margin: 0;
}

.features dt {
  font-size: 1.25rem;
  font-stretch: 78%;
  font-weight: 800;
  line-height: 1.2;
}

.features dd {
  margin: 6px 0 0;
  color: var(--muted);
}

.steps {
  display: grid;
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0 12px;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  grid-row: span 2;
  font-size: 2.5rem;
  font-stretch: 66%;
  font-weight: 880;
  line-height: 0.9;
  color: var(--band-4);
}

.steps li:nth-child(2)::before {
  color: var(--band-3);
}

.steps li:nth-child(3)::before {
  color: var(--band-2);
}

.steps p {
  margin: 0;
}

/* The foot: where the source, the issues and the releases are. */
footer {
  margin-top: clamp(24px, 4vw, 48px);
  padding-block: 40px 48px;
  background: var(--strip);
  color: var(--on-strip-muted);
  font-size: 0.9375rem;
}

footer :focus-visible {
  outline-color: #8fb1ff;
}

footer p {
  margin: 0;
}

footer a {
  color: var(--on-strip);
}

/* The download page and the missing page: a short message under the masthead. */
.message {
  padding-block: clamp(40px, 8vw, 96px);
}

.message h1 {
  margin: 0 0 20px;
  font-size: clamp(2.25rem, 1.6rem + 3vw, 3.75rem);
  font-stretch: 66%;
  font-weight: 880;
  line-height: 0.98;
}

.message p {
  margin: 0 0 16px;
}

.message.intro {
  padding-bottom: 8px;
}

/* The release notes, as GitHub renders them: the version and its date beside the notes, like the home page's parts. */
.releases {
  padding-bottom: clamp(40px, 8vw, 96px);
}

.releases article {
  display: grid;
  grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
  grid-template-rows: auto 1fr;
  column-gap: clamp(24px, 5vw, 72px);
  padding-block: 32px;
  border-top: 1px solid var(--rule);
}

.release-body {
  grid-column: 2;
  grid-row: 1 / span 2;
}

.release-body > :first-child {
  margin-top: 0;
}

.releases article > h2 {
  margin: 0;
  font-size: clamp(1.75rem, 1.4rem + 1.2vw, 2.25rem);
  font-stretch: 70%;
  font-weight: 850;
  line-height: 1;
}

.release-date {
  margin: 8px 0 20px;
  color: var(--muted);
  font-size: 0.9375rem;
}

.release-body h2,
.release-body h3 {
  margin: 28px 0 8px;
  font-size: 1.25rem;
  font-stretch: 78%;
  font-weight: 800;
  line-height: 1.2;
}

.release-body p,
.release-body ul {
  margin: 0 0 12px;
}

.release-body li {
  margin-bottom: 6px;
}

@media (max-width: 760px) {
  .part,
  .releases article {
    grid-template-columns: minmax(0, 1fr);
  }

  .release-body {
    grid-column: auto;
    grid-row: auto;
  }

  .features {
    grid-template-columns: minmax(0, 1fr);
  }

  .bar nav {
    gap: 16px;
    font-size: 0.9375rem;
  }

  .shot img {
    border-radius: 8px;
  }
}

/* GitHub keeps the line breaks of the release text; let the lines wrap to the page instead. */
.release-body br {
  display: none;
}