/* Thoughts on recording thoughts — Studio
   Archivo for the label and the machinery, Besley for the words, on cassette
   orange. Plain elements only, no classes; see README.md for what maps to
   what.
   The title is the label on a home-taped cassette, set as a waveform. The
   strip under it holds the whole piece as one waveform and its running time.
   The gutter runs a tape counter and a progress bar: where you'd be if you
   read the piece aloud. The lines that were said out loud are in Besley
   Italic. The footnote is the B-side. */

@font-face {
  font-family: "Studio Archivo";  /* own name, so an installed Archivo can never stand in */
  src: url("fonts/archivo.b2c0c987.woff2") format("woff2");
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}
@font-face {
  font-family: "Studio Besley";  /* own name, so an installed Besley can never stand in */
  src: url("fonts/besley.e60811e0.woff2") format("woff2");
  font-weight: 400 900;
  font-display: swap;
}
@font-face {
  font-family: "Studio Besley";
  src: url("fonts/besley-italic.65172320.woff2") format("woff2");
  font-weight: 400 900;
  font-style: italic;
  font-display: swap;
}

:root {
  --ground: #E8431C;
  --ink: #1E0B04;
  --card: #F6E9D6;
  --line: rgba(30, 11, 4, 0.22);   /* the unplayed part of a progress bar */

  --pad: clamp(1.25rem, 5vw, 5rem);
  --gutter: 6.5rem;
  --gap: 2.5rem;
  --measure: 37rem;
  --lh: 1.95rem;    /* one line of body text */

  --face: "Studio Archivo", "Helvetica Neue", Arial, sans-serif;
  --text: "Studio Besley", Rockwell, Georgia, serif;
}

* { box-sizing: border-box; }

html {
  background: var(--ground);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: 0 var(--pad);
  font-family: var(--face);
  font-size: 1.1875rem;
  font-weight: 400;
  line-height: var(--lh);
  font-synthesis: none;
}

::selection { background: var(--ink); color: var(--ground); }

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

header,
article,
footer {
  max-width: calc(var(--gutter) + var(--gap) + var(--measure));
  margin: 0 auto;
}

/* ---- Running head -------------------------------------------------------- */

header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding: 2.25rem 0 0;
  font-size: 0.8125rem;
  font-weight: 700;
  font-stretch: 75%;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
header p { margin: 0; }
header a { text-decoration: none; }
header a::before { content: "« " / ""; }
header a:hover { text-decoration: underline; }

/* ---- The inlay card: title and counter --------------------------------- */

h1 {
  margin: clamp(2.5rem, 6vw, 4.5rem) 0 0;
  padding: clamp(1.25rem, 3vw, 2rem) clamp(1.25rem, 3vw, 2.25rem) clamp(1rem, 2.5vw, 1.75rem);
  background: var(--card);
  border-radius: 0.375rem 0.375rem 0 0;
  font-weight: 900;
  line-height: 0.86;
  text-transform: uppercase;
  container-type: inline-size;
}
/* Three lines, each a waveform: every letter's weight, width and height
   (build.mjs sets --w, --s and --a) swell and fade along its line. The long
   middle line is set smaller so all three fill the label. */
h1 > span {
  display: block;
  font-size: 17cqi;
  line-height: 1;
  white-space: nowrap;
}
h1 > span:nth-child(2) { font-size: 12cqi; margin: 0.08em 0 0.12em; }
h1 span span {
  display: inline-block;
  font-weight: var(--w);
  font-stretch: calc(var(--s) * 1%);
  /* scaled about the middle of the capitals, like a waveform about its centre line */
  transform: scaleY(calc(0.7 + 0.5 * var(--a)));
  transform-origin: 50% 64%;
}

/* the strip under it: Side A, the whole piece as one waveform, the counter */
h1 + p {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 1.5rem);
  margin: 0 0 clamp(3rem, 6vw, 4.5rem);
  padding: 0.7rem clamp(1.25rem, 3vw, 2.25rem);
  background: var(--ink);
  color: var(--card);
  border-radius: 0 0 0.375rem 0.375rem;
  font-size: 0.875rem;
  font-weight: 800;
  font-stretch: 75%;
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
h1 + p span { flex: none; }
h1 + p svg {
  flex: 1;
  min-width: 0;
  height: 2.25rem;
  fill: var(--card);
}
/* the counter's digits, each in its own window */
h1 + p span:last-child {
  font-size: 1.25rem;
  font-weight: 600;
  font-stretch: 100%;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.32em;
  padding: 0.05em 0.1em 0.05em 0.42em;
  border: 2px solid var(--card);
  border-radius: 0.2rem;
}

/* ---- Text ---------------------------------------------- */

article > p:not(h1 + p) {
  position: relative;
  max-width: var(--measure);
  margin: 0 0 1.75rem;
  font-family: var(--text);
  font-size: 1.125rem;
  line-height: 1.7;
}

/* the lede, a little louder */
article > h1 + p + p {
  font-size: clamp(1.3125rem, 2vw, 1.5rem);
  font-weight: 500;
  line-height: 1.5;
}

/* the closing paragraph */
article > p:last-of-type {
  margin-top: 2.5rem;
  font-size: clamp(1.375rem, 2.6vw, 1.75rem);
  font-weight: 700;
  line-height: 1.35;
}

/* the words that were said out loud */
em { font-style: italic; }

/* The counter, with a play button before it and a progress bar under it.
   On narrow screens they sit above the paragraph; on wide ones, in the gutter. */
article > p:not(h1 + p)::before {
  content: var(--t) / "";
  display: block;
  width: var(--gutter);
  margin-bottom: 0.5rem;
  font-family: var(--face);
  font-style: normal;
  padding-left: 1.1rem;
  font-size: 0.875rem;
  font-weight: 700;
  font-stretch: 75%;
  line-height: calc(var(--lh) - 0.5rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  /* the progress bar: played, then still to play */
  padding-bottom: 0.5rem;
  background:
    linear-gradient(var(--ink), var(--ink)) no-repeat 0 100% / calc(var(--pos) * 100%) 3px,
    linear-gradient(var(--line), var(--line)) no-repeat 0 100% / 100% 3px;
}
article > p:not(h1 + p)::after {
  content: "";
  position: absolute;
  top: calc((var(--lh) - 0.5rem) / 2 - 0.3rem);
  left: 0;
  width: 0.55rem;
  height: 0.6rem;
  background: var(--ink);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

sup { font-size: 0.65em; font-weight: 900; line-height: 0; }
sup a { text-decoration: none; }

/* ---- Side B: the note ----------------------------------------------------- */

section {
  max-width: var(--measure);
  margin-top: calc(var(--lh) * 2);
  padding: 1.25rem 1.5rem 1.5rem;
  background: var(--card);
  border-radius: 0.375rem;
  font-family: var(--text);
  font-size: 1rem;
  line-height: 1.6;
}
section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--face);
  font-size: 0.875rem;
  font-weight: 800;
  font-stretch: 75%;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
section p { margin: 0; }
section p b { font-weight: 900; margin-right: 0.25em; }
a[role="doc-backlink"] { text-decoration: none; }

/* ---- Wide screens: the counter hangs in the gutter ------------------------ */

@media (min-width: 52rem) {
  article {
    display: grid;
    grid-template-columns: var(--gutter) minmax(0, var(--measure));
    column-gap: var(--gap);
  }
  article > * { grid-column: 1 / -1; }
  article > p:not(h1 + p),
  section { grid-column: 2; }
  article > p:not(h1 + p)::before {
    position: absolute;
    top: 0.25rem;
    margin: 0;
    left: calc(-1 * (var(--gutter) + var(--gap)));
  }
  article > p:not(h1 + p)::after {
    top: calc(0.25rem + (var(--lh) - 0.5rem) / 2 - 0.3rem);
    left: calc(-1 * (var(--gutter) + var(--gap)));
  }
}

/* ---- Footer ---------------------------------------------------------------- */

footer {
  margin-top: 4.5rem;
  padding: 1rem 0 3rem;
  border-top: 2px solid var(--ink);
  font-size: 0.875rem;
  line-height: 1.6;
}
footer p { max-width: 40em; margin: 0; }

/* ---- Specimen labels ------------------------------------------------------
   Generated content with empty alt text, so screen readers skip it. Delete
   this section to remove them. */

h1::after,
section::after {
  display: block;
  font-family: var(--face);
  font-size: 0.6875rem;
  font-weight: 600;
  font-stretch: 75%;
  line-height: 1.5;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: pre-line;
  opacity: 0.7;
}
h1::after {
  content: "Archivo · weight, width and height per letter" / "";
  margin-top: 1.25rem;
  font-size: 0.6875rem;
}
section::after {
  content: "Besley Regular · the B-side" / "";
  margin-top: 1rem;
}