/* insert.css
   The paper insert pulled from the sleeve: history, genres, channels, artists.
   Paper ground, black type. The four sleeve colours appear only as surfaces:
   the side tabs, a chapter panel, the row under the pointer. */

.insert {
  --gutter: clamp(16px, 4vw, 56px);
  --display: 900 1em / .86 var(--sans);
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

.insert main { flex: 1; }

.wrap {
  width: 100%;
  max-width: 96rem;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip {
  position: absolute;
  z-index: 50;
  top: 0;
  left: 0;
  padding: .8rem 1rem;
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-110%);
}

.skip:focus { transform: none; outline-color: var(--paper); outline-offset: -5px; }

/* The sleeve's edge above the insert: four tabs back to the four sides. */
.strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.strip a,
.foot-sides a {
  background: var(--cell);
  text-decoration: none;
}

[data-side-link="a"] { --cell: var(--side-a); }
[data-side-link="b"] { --cell: var(--side-b); }
[data-side-link="c"] { --cell: var(--side-c); }
[data-side-link="d"] { --cell: var(--side-d); }

.strip a {
  display: flex;
  align-items: center;
  gap: .7rem;
  min-width: 0;
  min-height: 44px;
  padding: 0 min(var(--gutter), 1.25rem);
}

.strip b {
  font: 900 1.5rem / 1 var(--sans);
  font-stretch: 62%;
}

.strip span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.strip a:hover,
.foot-sides a:hover {
  background: var(--ink);
  color: var(--cell);
}

.strip a:focus-visible,
.foot-sides a:focus-visible { outline-offset: -6px; }

.strip a:hover:focus-visible,
.foot-sides a:hover:focus-visible { outline-color: var(--cell); }

/* Header */
.insert .bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: clamp(.9rem, 2vw, 1.5rem);
}

.insert .nav,
.insert .menu-toggle { box-shadow: inset 0 0 0 var(--rule) var(--ink); }

@media (max-width: 760px) {
  .insert .nav {
    right: var(--gutter);
    left: var(--gutter);
    top: calc(100% - .4rem);
    box-shadow: none;
  }
}

/* Page head: one loud word, its count, a short note. */
.head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 1rem clamp(1rem, 3vw, 3rem);
  padding-block: clamp(1.75rem, 5vw, 4.5rem) clamp(1.5rem, 3.5vw, 3rem);
}

.head h1 {
  font: var(--display);
  font-size: clamp(4rem, 15.5vw, 12rem);
  font-stretch: 62%;
  letter-spacing: -.012em;
  text-transform: uppercase;
  margin-block-end: -.06em;
}

.head-count {
  justify-self: start;
  padding-block-end: .5em;
  font-size: clamp(.75rem, .62rem + .4vw, 1rem);
}

.lede {
  grid-column: 1 / -1;
  max-width: 58ch;
  font-size: clamp(1.0625rem, .95rem + .5vw, 1.375rem);
  line-height: 1.4;
  text-wrap: pretty;
}

/* Search and filters */
.tools {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .9rem;
  padding-block: 1.1rem 1.25rem;
  border-top: var(--rule) solid var(--ink);
}

.search {
  display: flex;
  align-items: center;
  box-shadow: inset 0 0 0 var(--rule) var(--ink);
}

.search:focus-within { box-shadow: inset 0 0 0 4px var(--ink); }

.search label {
  flex: none;
  padding-inline: 1rem .25rem;
}

.search input {
  flex: 1;
  width: 100%;
  min-width: 0;
  min-height: 3.25rem;
  padding: 0 1rem 0 .5rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-size: 1.0625rem;
  appearance: none;
}

.search input:focus { outline: 0; }
.search input::placeholder { color: var(--ink-soft); opacity: 1; }
.search input::-webkit-search-cancel-button { appearance: none; }

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}

.filters button {
  min-height: 44px;
  padding: 0 .95rem;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: inset 0 0 0 var(--rule) var(--ink);
  font: 700 .75rem / 1 var(--sans);
  font-stretch: 116%;
  letter-spacing: .05em;
  text-transform: uppercase;
  cursor: pointer;
}

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

.filters button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.filters button[aria-pressed="true"]:focus-visible { outline-offset: -6px; outline-color: var(--paper); }

.filters .reset {
  box-shadow: none;
  text-decoration: underline;
  text-decoration-thickness: .1em;
  text-underline-offset: .22em;
}

.filters .reset:hover { background: transparent; text-decoration-thickness: .2em; }

.letters {
  display: flex;
  flex-wrap: wrap;
  padding: 0 var(--rule) var(--rule) 0;
}

.letters a {
  display: grid;
  place-items: center;
  min-width: 2.5rem;
  min-height: 2.75rem;
  margin: 0 calc(-1 * var(--rule)) calc(-1 * var(--rule)) 0;
  box-shadow: inset 0 0 0 var(--rule) var(--ink);
  font: 800 1.125rem / 1 var(--sans);
  font-stretch: 72%;
  text-decoration: none;
}

.letters a:hover {
  background: var(--ink);
  color: var(--paper);
}

.letters a:focus-visible { outline-offset: -6px; position: relative; }
.letters a:hover:focus-visible { outline-color: var(--paper); }

.letters a[aria-disabled="true"] {
  color: var(--ink-soft);
  box-shadow: inset 0 0 0 1px var(--ink-soft);
  pointer-events: none;
}

.count { text-transform: uppercase; }

.empty,
.noscript {
  padding-block: 1.5rem;
  border-top: var(--rule) solid var(--ink);
  font-size: 1.125rem;
}

/* Rows: the artists, one line each. Open a row for its notes. */
.rows,
.entries { border-bottom: var(--rule) solid var(--ink); }

/* --fit is the width, in ems, of the longest single word among the names on
   the page. The name size is held to what lets that word sit in its column. */
.entries {
  --egap: clamp(1.25rem, 3vw, 3rem);
  --fit: 5.6;
  container-type: inline-size;
}

[data-page="channels"] .entries { --fit: 7.55; }

.row { border-top: var(--rule) solid var(--ink); }
.row:nth-child(4n + 1) { --tint: var(--side-a); }
.row:nth-child(4n + 2) { --tint: var(--side-b); }
.row:nth-child(4n + 3) { --tint: var(--side-c); }
.row:nth-child(4n) { --tint: var(--side-d); }

.row summary,
.r-body {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1.3fr) 1.25rem;
  column-gap: clamp(.75rem, 1.6vw, 1.5rem);
  padding-inline: .75rem;
}

.row summary {
  align-items: baseline;
  padding-block: .78rem .7rem;
  cursor: pointer;
  list-style: none;
}

.row summary::-webkit-details-marker { display: none; }
.row summary:hover { background: var(--tint); }
.row summary:focus-visible { outline-offset: -5px; }

.row details[open] > summary {
  background: var(--ink);
  color: var(--paper);
}

.row details[open] > summary:focus-visible { outline-color: var(--paper); }

.r-no { align-self: center; }

.r-name {
  font: 800 1.5rem / 1.02 var(--sans);
  font-stretch: 70%;
  text-transform: uppercase;
  text-wrap: balance;
}

.r-meta { display: contents; }

.r-place,
.r-style { font-size: .9375rem; line-height: 1.3; }

/* The open/close mark: two bars drawn in CSS, the upright one folds away. */
.r-mark {
  position: relative;
  align-self: center;
  width: 1.125rem;
  height: 1.125rem;
}

.r-mark::before,
.r-mark::after {
  content: "";
  position: absolute;
  top: calc(50% - 1.5px);
  left: 0;
  width: 100%;
  height: 3px;
  background: currentColor;
  transition: transform .28s var(--ease-out);
}

.r-mark::after { transform: rotate(90deg); }
.row details[open] .r-mark::after { transform: rotate(0deg); }

.r-body {
  row-gap: .9rem;
  padding-block: 1.1rem 1.6rem;
}

.r-text {
  grid-column: 2 / span 2;
  max-width: 62ch;
  font-size: 1.0625rem;
  text-wrap: pretty;
}

.r-facts {
  grid-column: 4 / span 2;
  display: grid;
  align-content: start;
  gap: .55rem;
  font-size: .9375rem;
  line-height: 1.35;
}

.r-facts dt,
.r-find b {
  font: 700 .6875rem / 1.3 var(--sans);
  font-stretch: 116%;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.r-find {
  grid-column: 2 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .25rem 1rem;
  padding-top: .9rem;
  border-top: 1px solid var(--ink);
  font-size: .9375rem;
}

.r-find[hidden] { display: none; }
.r-find a { padding-block: .4rem; }

.r-body a:hover,
.e-source a:hover,
.foot-base a:hover { text-decoration-thickness: .2em; }

/* Entries: genres and channels, set out in full. */
.entry {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4.6fr) minmax(0, 3fr);
  gap: .6rem var(--egap);
  align-items: start;
  padding-block: clamp(1.4rem, 2.6vw, 2.25rem) clamp(1.6rem, 3vw, 2.6rem);
  border-top: var(--rule) solid var(--ink);
}

.e-name {
  grid-column: 1;
  grid-row: 1;
  font: var(--display);
  font-size: min(clamp(2rem, 1.2rem + 2.6vw, 3.5rem), calc((100cqi - 2 * var(--egap)) * .3968 / var(--fit)));
  font-stretch: 64%;
  letter-spacing: -.005em;
  text-transform: uppercase;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.e-when {
  grid-column: 1;
  grid-row: 2;
  font-weight: 600;
}

.e-text {
  grid-column: 2;
  grid-row: 1 / span 2;
  max-width: 54ch;
  font-size: 1.125rem;
  line-height: 1.45;
  text-wrap: pretty;
}

.e-traits {
  grid-column: 3;
  grid-row: 1 / span 2;
  display: grid;
  gap: .3rem;
  font-size: .9375rem;
  line-height: 1.35;
}

.e-traits li {
  padding-top: .3rem;
  border-top: 1px solid var(--ink);
}

.e-tags {
  grid-column: 2;
  grid-row: 3;
  display: flex;
  flex-wrap: wrap;
  gap: .15rem 0;
  padding-top: .35rem;
}

.e-tags li {
  font: 700 .6875rem / 1.3 var(--sans);
  font-stretch: 116%;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.e-tags li + li::before {
  content: "/";
  margin-inline: .5em;
}

.e-source {
  grid-column: 3;
  grid-row: 3;
  padding-top: .2rem;
  font-size: .9375rem;
}

.entry--channel .e-tags { grid-column: 3; grid-row: 1; padding-top: .5rem; }
.entry--channel .e-source { grid-row: 2 / span 2; align-self: end; font-size: 1.0625rem; font-weight: 700; }

/* History: a tracklist, then six chapters. Each chapter has a colour panel
   that carries its years and its one-line summary. */
.tracklist { border-bottom: var(--rule) solid var(--ink); }

.tracklist li { border-top: var(--rule) solid var(--ink); }
.tracklist li:nth-child(4n + 1) { --tint: var(--side-a); }
.tracklist li:nth-child(4n + 2) { --tint: var(--side-b); }
.tracklist li:nth-child(4n + 3) { --tint: var(--side-c); }
.tracklist li:nth-child(4n) { --tint: var(--side-d); }

.tracklist a {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr) auto;
  align-items: baseline;
  column-gap: clamp(.75rem, 1.6vw, 1.5rem);
  padding: .85rem .75rem .75rem;
  text-decoration: none;
}

.tracklist a:hover { background: var(--tint); }
.tracklist a:focus-visible { outline-offset: -5px; }

.t-name {
  font: 800 clamp(1.5rem, 1.1rem + 1.5vw, 2.25rem) / 1.02 var(--sans);
  font-stretch: 70%;
  text-transform: uppercase;
}

.t-years { text-transform: uppercase; }

.tracklist--plain a { grid-template-columns: minmax(0, 1fr) auto; }

.chapters { padding-block: clamp(2rem, 5vw, 4rem) 0; }

.chapter {
  --gap: clamp(1.25rem, 3.5vw, 3.5rem);
  --panel-pad: clamp(1rem, 2.2vw, 2rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  grid-template-rows: auto 1fr;
  column-gap: var(--gap);
  container-type: inline-size;
  scroll-margin-top: 1rem;
}

.chapter + .chapter { margin-top: clamp(1.25rem, 3vw, 2.5rem); }

.chapter::before {
  content: "";
  grid-column: 1;
  grid-row: 1 / 3;
  background: var(--side);
}

.chapter h2 {
  grid-column: 1 / -1;
  grid-row: 1;
  display: grid;
  grid-template-columns: subgrid;
  align-items: start;
}

.ch-no {
  display: block;
  margin-top: calc(var(--panel-pad) - 1rem);
  margin-bottom: .9rem;
  letter-spacing: .04em;
}

.ch-years {
  /* Sized so the longest range, 1997 to 2001, fills the panel exactly. */
  padding: 1rem 1rem 0;
  padding-inline: var(--panel-pad);
  font: var(--display);
  font-size: calc(((100cqi - var(--gap)) / 2 - 2 * var(--panel-pad)) / 3.64);
  font-stretch: 62%;
  letter-spacing: -.012em;
  white-space: nowrap;
}

.ch-title {
  padding-top: var(--panel-pad);
  font: var(--display);
  font-size: clamp(2.4rem, 1.2rem + 3.8vw, 5rem);
  font-stretch: 62%;
  letter-spacing: -.008em;
  text-transform: uppercase;
  text-wrap: balance;
}

.ch-pull {
  grid-column: 1;
  grid-row: 2;
  align-self: end;
  max-width: 22ch;
  padding: clamp(1.5rem, 4vw, 4rem) var(--panel-pad) var(--panel-pad);
  font: 700 clamp(1.25rem, 1rem + 1vw, 1.875rem) / 1.14 var(--sans);
  font-stretch: 116%;
  text-wrap: balance;
}

.ch-body {
  grid-column: 2;
  grid-row: 2;
  align-self: end;
  max-width: 60ch;
  padding-block: clamp(1rem, 2vw, 1.75rem) var(--panel-pad);
  font-size: clamp(1.0625rem, 1rem + .35vw, 1.25rem);
  line-height: 1.5;
  text-wrap: pretty;
}

/* The close: put the record back on. */
.foot { margin-top: clamp(3rem, 8vw, 7rem); }

.foot-sides {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.foot-sides a {
  display: grid;
  align-content: space-between;
  gap: 1.5rem;
  min-width: 0;
  padding: clamp(.9rem, 2vw, 1.75rem) var(--gutter) clamp(1rem, 2vw, 1.75rem);
}

.foot-sides b {
  font: 900 clamp(4.5rem, 2rem + 10vw, 11rem) / .8 var(--sans);
  font-stretch: 62%;
}

.foot-sides strong {
  display: block;
  font: 900 clamp(1.25rem, .9rem + 1.3vw, 2rem) / 1 var(--sans);
  font-stretch: 68%;
  text-transform: uppercase;
}

.foot-base {
  padding: 2rem 1rem;
  padding-inline: var(--gutter);
  background: var(--ink);
  color: var(--paper);
}

.foot-base-in {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem clamp(1.25rem, 3vw, 3rem);
  max-width: calc(96rem - 2 * var(--gutter));
  margin-inline: auto;
}

.foot-base p { max-width: 62ch; font-size: .9375rem; line-height: 1.4; }

.foot-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
}

.foot-nav a {
  display: inline-grid;
  align-items: center;
  min-height: 44px;
}

.foot-base :focus-visible { outline-color: var(--paper); }
.foot-base ::selection { background: var(--paper); color: var(--ink); }
.foot-copy { grid-column: 1 / -1; }

/* Narrow screens: everything in one column. */
@media (max-width: 820px) {
  .strip a { justify-content: center; padding: 0; }
  .strip span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }
}

@media (max-width: 860px) {
  .entry { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .e-name, .e-when { grid-column: 1 / -1; }
  .e-name { grid-row: 1; font-size: clamp(2rem, 1.2rem + 2.6vw, 3.5rem); }
  .e-when { grid-row: 2; }
  .e-text { grid-column: 1 / -1; grid-row: 3; }
  .e-traits { grid-column: 1; grid-row: 4 / span 2; }
  .e-tags { grid-column: 2; grid-row: 4; padding-top: .3rem; }
  .e-source { grid-column: 2; grid-row: 5; }
  .entry--channel .e-tags { grid-column: 1; grid-row: 4; padding-top: 0; }
  .entry--channel .e-source { grid-column: 2; grid-row: 4; justify-self: end; }

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

@media (max-width: 680px) {

  .head { grid-template-columns: minmax(0, 1fr); gap: .75rem; }
  .head-count { padding-block-end: 0; }

  .row summary {
    grid-template-columns: 2.4rem minmax(0, 1fr) 1.125rem;
    row-gap: .2rem;
  }

  .r-no { grid-row: 1; align-self: baseline; }
  .r-name { grid-column: 2; grid-row: 1; font-size: 1.375rem; }
  .r-mark { grid-column: 3; grid-row: 1; }
  .r-meta { display: block; grid-column: 2 / -1; grid-row: 2; }
  .r-place:not(:empty)::after { content: " · "; }

  .r-body { grid-template-columns: 2.4rem minmax(0, 1fr); }
  .r-text, .r-facts, .r-find { grid-column: 2; }

  .entry { grid-template-columns: minmax(0, 1fr); }
  .e-text, .e-traits, .e-tags, .e-source,
  .entry--channel .e-tags, .entry--channel .e-source {
    grid-column: 1;
    grid-row: auto;
    justify-self: stretch;
  }

  .tracklist a { grid-template-columns: 2.4rem minmax(0, 1fr); row-gap: .15rem; }
  .t-years { grid-column: 2; }
  .tracklist--plain a { grid-template-columns: minmax(0, 1fr); }

  .chapter { grid-template-columns: minmax(0, 1fr); grid-template-rows: auto; }
  .chapter::before { display: none; }
  .chapter h2 { display: block; }
  .ch-years {
    display: block;
    padding-bottom: .1em;
    background: var(--side);
    font-size: calc((100cqi - 2 * var(--panel-pad)) / 3.64);
  }
  .ch-title { display: block; padding-top: 1.1rem; }
  .ch-pull { grid-row: auto; max-width: none; padding: 1rem 0 0; }
  .ch-body { grid-column: 1; grid-row: auto; padding-block: .9rem 2.25rem; }

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