@layer components {
  .visually-hidden {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .page:has(.dock) { padding-block-end: var(--dock-h, 0px); }

  :is(.lib, .pod) {
    a { color: inherit; }

    button { font: inherit; color: inherit; }

    .sr-only {
      position: absolute;
      inline-size: 1px;
      block-size: 1px;
      overflow: hidden;
      clip-path: inset(50%);
      white-space: nowrap;
    }

    .page-title {
      margin: 0;
      font-size: var(--text-4xl);
      font-weight: 300;
      letter-spacing: -0.02em;
      line-height: var(--line-height-tight);
    }

    .lede {
      max-inline-size: 34em;
      font-size: var(--text-lg);
      color: var(--color-text-muted);
    }

    .panel {
      position: relative;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sharp);
      background: var(--color-panel);
      color: var(--color-text);
      box-shadow:
        0 1px 2px var(--color-panel-shadow-near),
        0 6px 18px var(--color-panel-shadow-far);
    }

    .section-index {
      display: flex;
      flex-wrap: wrap;
      align-items: baseline;
      gap: var(--space-2) var(--space-4);
      font-family: var(--font-section);
      font-size: var(--text-section);
      font-weight: 400;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--color-text-muted);

      h2 { margin: 0; font: inherit; }

      .index-number { color: var(--color-accent); }

      .index-rule {
        flex: 1;
        align-self: center;
        min-inline-size: var(--space-6);
        block-size: 1px;
        background: var(--color-border);
      }

      .index-end {
        font-family: var(--font-body);
        letter-spacing: 0;
        text-transform: none;
      }
    }

    .button-wipe {
      position: relative;
      isolation: isolate;
      overflow: hidden;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-block-size: 3rem;
      padding: 0 var(--space-5);
      border: 1px solid var(--color-border-strong);
      border-radius: var(--radius-sharp);
      background: transparent;
      color: var(--color-text);
      font-family: var(--font-mono);
      font-size: var(--text-xs);
      font-weight: 500;
      letter-spacing: var(--tracking-caps);
      text-transform: uppercase;
      text-decoration: none;
      white-space: nowrap;
      cursor: pointer;
      transition: border-color var(--duration-wipe) var(--ease-in-out);

      &::before {
        content: "";
        position: absolute;
        inset-block: 0;
        inset-inline-start: 0;
        z-index: -1;
        inline-size: calc(100% + var(--wipe-feather));
        background: linear-gradient(90deg, var(--color-wipe-fill) calc(100% - var(--wipe-feather)), transparent);
        transform: translateX(-100%);
        transition: transform var(--duration-wipe) var(--ease-in-out);
      }

      &:hover, &:focus-visible { background: transparent; border-color: var(--color-wipe-border); }

      &:hover::before, &:focus-visible::before { transform: translateX(0); }

      &[hidden] { display: none; }

      &.compact { min-block-size: 2.5rem; padding-inline: var(--space-4); }
    }

    .with-glyph {
      gap: var(--space-2);

      .glyph { color: var(--color-text-muted); }
    }

    .glyph { flex: none; inline-size: 14px; block-size: 14px; }

    .ctl {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.3rem;
      min-inline-size: 2.5rem;
      block-size: 2.5rem;
      padding: 0 var(--space-2);
      border: 1px solid var(--color-border-strong);
      border-radius: var(--radius-sharp);
      background: transparent;
      color: var(--color-text);
      font-family: var(--font-mono);
      font-size: var(--text-xs);
      letter-spacing: 0.04em;
      cursor: pointer;
      transition: background-color var(--duration-fill) var(--ease-out);

      .glyph { color: var(--color-text-muted); }

      &:hover { background: var(--color-hover-wash); }

      &:disabled { opacity: 0.4; cursor: not-allowed; }
    }

    .play-main {
      display: inline-grid;
      place-items: center;
      flex: none;
      inline-size: 3rem;
      block-size: 3rem;
      padding: 0;
      border: 0;
      border-radius: var(--radius-sharp);
      background: var(--color-text);
      color: var(--color-surface);
      cursor: pointer;
      transition: background-color var(--duration-fill) var(--ease-out);

      svg { inline-size: 18px; block-size: 18px; }

      &:hover { background: color-mix(in oklch, var(--color-text) 84%, var(--color-surface)); }

      &:disabled { opacity: 0.4; cursor: not-allowed; }
    }

    .pp path {
      fill: none;
      stroke: currentColor;
      stroke-width: 1.25;
      stroke-linecap: round;
      stroke-linejoin: round;
      transition: d 280ms var(--ease-in-out), stroke-width 280ms var(--ease-in-out);
    }

    .pp-a { d: path("M4.5 2.75 L4.5 7 L4.5 11.25"); }

    .pp-b { d: path("M4.5 2.75 L11.25 7 L4.5 11.25"); }

    [data-playing="true"] {
      .pp path { stroke-width: 1.5; }

      .pp-a { d: path("M4.75 3 L4.75 7 L4.75 11"); }

      .pp-b { d: path("M9.25 3 L9.25 7 L9.25 11"); }
    }

    .timeline {
      grid-area: time;
      display: grid;
      grid-template-columns: auto minmax(0, 1fr) auto;
      align-items: center;
      gap: var(--space-3);
    }

    .time {
      font-size: var(--text-sm);
      font-variant-numeric: tabular-nums;
      color: var(--color-text-muted);
      white-space: nowrap;
    }

    .scrub {
      --pct: 0%;
      --scrub-fill: linear-gradient(90deg, var(--color-scrub-start), var(--color-scrub-end));
      appearance: none;
      inline-size: 100%;
      min-inline-size: 6rem;
      block-size: 1.75rem;
      margin: 0;
      background: transparent;
      cursor: pointer;

      &::-webkit-slider-runnable-track {
        block-size: 4px;
        background: var(--scrub-fill) 0 0 / var(--pct) 100% no-repeat, var(--color-border-strong);
      }

      &::-moz-range-track {
        block-size: 4px;
        background: var(--scrub-fill) 0 0 / var(--pct) 100% no-repeat, var(--color-border-strong);
      }

      &::-webkit-slider-thumb {
        appearance: none;
        inline-size: 12px;
        block-size: 12px;
        margin-block-start: -4px;
        border: 0;
        border-radius: 1px;
        background: var(--color-text);
      }

      &::-moz-range-thumb {
        inline-size: 12px;
        block-size: 12px;
        border: 0;
        border-radius: 1px;
        background: var(--color-text);
      }

      &:disabled { cursor: not-allowed; opacity: 0.4; }
    }

    .select-wrap {
      position: relative;
      display: inline-flex;

      &::after {
        content: "";
        position: absolute;
        inset-block-start: 50%;
        inset-inline-end: 0.8rem;
        inline-size: 5px;
        block-size: 5px;
        border-inline-end: 1.25px solid var(--color-text-muted);
        border-block-end: 1.25px solid var(--color-text-muted);
        rotate: 45deg;
        translate: 0 -75%;
        pointer-events: none;
      }

      select {
        appearance: none;
        block-size: 2.5rem;
        padding-inline: var(--space-3) var(--space-6);
        border: 1px solid var(--color-border-strong);
        border-radius: var(--radius-sharp);
        background: transparent;
        color: var(--color-text);
        font-family: var(--font-mono);
        font-size: var(--text-xs);
        letter-spacing: 0.04em;
        cursor: pointer;

        &:hover { background: var(--color-hover-wash); }
      }

      option { background: var(--color-panel); color: var(--color-text); }
    }

    .resume-note {
      font-size: var(--text-sm);
      color: var(--color-text-muted);
      white-space: nowrap;
    }
  }

  .lib {
    display: grid;
    gap: var(--space-10);

    .lib-head { display: grid; gap: var(--space-3); justify-items: start; }

    .lib-summary { margin-block-start: var(--space-2); }

    .unit-block { display: grid; gap: var(--space-4); }

    .unit-block .section-index h2 { color: var(--color-text); }

    .unit-note {
      margin-block-start: calc(-1 * var(--space-2));
      font-size: var(--text-sm);
      color: var(--color-text-muted);
    }

    .tracks {
      padding: 0;
      list-style: none;
      container: tracks / inline-size;
    }

    .track {
      --code-w: 3.25rem;
      --icon-w: 2rem;
      --title-start: calc(var(--space-4) + var(--icon-w) + var(--space-3) + var(--code-w) + var(--space-3));
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      grid-template-areas: "play play" "note note" "dur link";
      align-items: center;
      column-gap: var(--space-4);
      padding-block-end: var(--space-3);
      border-block-end: 1px solid var(--color-border);
      transition: background-color var(--duration-fill) var(--ease-out);

      &:last-child { border-block-end: 0; }

      &:has(.track-play:hover) { background: var(--color-hover-wash); }

      &:has(.track-play:focus-visible) { outline: 2px solid var(--color-accent); outline-offset: -2px; }

      &:is([data-state="playing"], [data-state="paused"], [data-state="next"]) {
        background: color-mix(in oklch, var(--color-accent) 7%, var(--color-panel));

        &::before {
          content: "";
          position: absolute;
          inset-block: 0;
          inset-inline-start: 0;
          inline-size: 2px;
          background: var(--color-accent);
        }
      }
    }

    .track-play {
      grid-area: play;
      display: grid;
      grid-template-columns: var(--icon-w) var(--code-w) minmax(0, max-content) minmax(0, 1fr);
      align-items: center;
      gap: var(--space-3);
      min-block-size: 3.5rem;
      padding: var(--space-3) var(--space-4) 0;
      border: 0;
      background: none;
      color: inherit;
      text-align: start;
      cursor: pointer;

      &:hover { background: none; }

      &:focus-visible { outline: none; }
    }

    .track-row {
      grid-area: play;
      display: grid;
      grid-template-columns: var(--icon-w) var(--code-w) minmax(0, 1fr);
      align-items: center;
      gap: var(--space-3);
      min-block-size: 3.5rem;
      padding: var(--space-3) var(--space-4) 0;
    }

    .track-lock {
      display: grid;
      place-items: center;
      color: var(--color-text-subtle);

      .glyph { inline-size: 14px; block-size: 14px; }
    }

    .track-icon {
      display: grid;
      place-items: center;
      inline-size: var(--icon-w);
      block-size: var(--icon-w);
      border: 1px solid var(--color-border-strong);
      border-radius: var(--radius-sharp);
      color: var(--color-text-muted);
      transition: background-color var(--duration-fill) var(--ease-out), color var(--duration-fill) var(--ease-out);

      .track-play:hover & { color: var(--color-text); border-color: var(--color-wipe-border); }

      :is([data-state="playing"], [data-state="paused"]) & { background: var(--color-text); border-color: var(--color-text); color: var(--color-surface); }

      :is([data-state="playing"], [data-state="paused"]) .track-play:hover & {
        background: color-mix(in oklch, var(--color-text) 82%, var(--color-surface));
        border-color: color-mix(in oklch, var(--color-text) 82%, var(--color-surface));
        color: var(--color-surface);
      }
    }

    .track-code { color: var(--color-text-muted); }

    .track-title { font-size: var(--text-base); line-height: var(--line-height-tight); }

    .track-state {
      color: var(--color-accent-text);
      white-space: nowrap;

      &:empty { display: none; }
    }

    .track-note {
      grid-area: note;
      padding-inline-start: var(--title-start);
      font-size: var(--text-sm);
      color: var(--color-text-muted);
    }

    .track-dur {
      grid-area: dur;
      padding-inline-start: var(--title-start);
      font-size: var(--text-sm);
      font-variant-numeric: tabular-nums;
      color: var(--color-text-muted);
      white-space: nowrap;
    }

    .track-link {
      grid-area: link;
      padding-inline-end: var(--space-4);
      font-size: var(--text-sm);
      color: var(--color-text-muted);
      text-decoration: none;
      white-space: nowrap;

      &:hover { color: var(--color-text); text-decoration: underline; text-underline-offset: 0.2em; }
    }

    @container tracks (width < 44rem) {
      .track {
        padding-block-end: var(--space-4);

        :is(.track-play, .track-row) {
          grid-template-columns: var(--icon-w) var(--code-w) minmax(0, 1fr);
          row-gap: var(--space-1);
          padding-block-start: var(--space-4);
        }

        :is(.track-icon, .track-lock), .track-code, .track-title { grid-row: 1; }

        .track-state { grid-column: 3; grid-row: 2; justify-self: start; }

        .track-dur, .track-link { margin-block-start: var(--space-2); }
      }
    }

    @container tracks (width >= 44rem) {
      .track {
        grid-template-columns: minmax(0, 1fr) 4.5rem 7rem;
        grid-template-areas: "play dur link" "note . .";
        padding-block-end: 0;

        :is(.track-play, .track-row) { padding-block-end: var(--space-3); }

        .track-dur { padding: 0; text-align: end; }

        .track-link { padding-inline-start: var(--space-4); }

        .track-note { margin-block-start: calc(-1 * var(--space-3)); padding-block-end: var(--space-3); }
      }
    }

    .empty-state {
      display: grid;
      gap: var(--space-3);
      justify-items: start;
      max-inline-size: 40rem;
      padding: var(--space-6);

      .button-wipe { margin-block-start: var(--space-3); }
    }

    .empty-title { font-size: var(--text-xl); font-weight: 300; }

    .dock {
      position: fixed;
      inset-inline: 0;
      inset-block-end: 0;
      z-index: 30;
      border-block-start: 1px solid var(--color-glass-ring);
      background: var(--color-glass-fill);
      box-shadow: 0 -8px 24px var(--color-glass-shadow);
      backdrop-filter: blur(14px);
      animation: dock-in var(--duration-spring) var(--ease-out);
    }

    .dock-inner {
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      grid-template-areas: "transport now" "time time" "tools tools";
      align-items: center;
      gap: var(--space-3) var(--space-4);
      padding-block: var(--space-3);
    }

    .now {
      grid-area: now;
      display: grid;
      gap: 0.125rem;
      min-inline-size: 0;

      .mono-label { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

      .resume-note { font-size: var(--text-xs); }
    }

    .now-title {
      overflow: hidden;
      font-size: var(--text-sm);
      text-decoration: none;
      text-overflow: ellipsis;
      white-space: nowrap;

      &:hover { text-decoration: underline; text-underline-offset: 0.2em; }
    }

    .now-upnext { color: var(--color-accent-text); }

    .transport { grid-area: transport; display: flex; align-items: center; gap: var(--space-2); }

    .dock-tools {
      grid-area: tools;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: var(--space-2) var(--space-3);
    }

    @media (min-width: 60rem) {
      .dock-inner {
        grid-template-columns: minmax(10rem, 16rem) auto minmax(12rem, 1fr) auto;
        grid-template-areas: "now transport time tools";
        gap: var(--space-5);
      }
    }
  }

  @keyframes dock-in { from { translate: 0 calc(100% + var(--space-4)); } }

  .pod {
    display: grid;
    gap: var(--space-8);

    > * { max-inline-size: 40rem; min-inline-size: 0; }

    .crumbs {
      display: flex;
      flex-wrap: wrap;
      gap: var(--space-2);

      a { text-decoration: none; }

      a:hover { color: var(--color-text); }
    }

    .pod-top { display: grid; gap: var(--space-3); justify-items: start; }

    .pod-eyebrow { margin-block-start: var(--space-3); }

    .pod-meta {
      display: flex;
      flex-wrap: wrap;
      gap: var(--space-1) var(--space-4);
      font-size: var(--text-base);
      color: var(--color-text-muted);
    }

    .pod-stale {
      display: inline-flex;
      align-items: center;
      gap: var(--space-2);

      &::before { content: ""; inline-size: 0.5rem; block-size: 0.5rem; border: 1.5px solid var(--color-text-subtle); }
    }

    .pod-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-block-start: var(--space-4); }

    .cta {
      position: relative;
      isolation: isolate;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: var(--space-3);
      min-block-size: 3rem;
      padding: 0 var(--space-5);
      border: 0;
      border-radius: var(--radius-sharp);
      color: var(--color-on-gradient);
      font-family: var(--font-mono);
      font-size: var(--text-xs);
      font-weight: 500;
      letter-spacing: var(--tracking-caps);
      text-transform: uppercase;
      white-space: nowrap;
      cursor: pointer;
      filter:
        drop-shadow(0 2px 3px color-mix(in oklch, var(--color-accent) 0%, transparent))
        drop-shadow(0 6px 14px color-mix(in oklch, var(--color-accent) 0%, transparent));
      transition: filter var(--duration-wipe) var(--ease-in-out);

      &, &:hover { background: var(--logo-gradient) var(--color-gradient-bottom); }

      &::after {
        content: "";
        position: absolute;
        inset: -0.375rem;
        border: 1.5px solid var(--color-accent);
        pointer-events: none;
        mask:
          linear-gradient(#000 0 0) top left / var(--bracket) var(--bracket) no-repeat,
          linear-gradient(#000 0 0) top right / var(--bracket) var(--bracket) no-repeat,
          linear-gradient(#000 0 0) bottom left / var(--bracket) var(--bracket) no-repeat,
          linear-gradient(#000 0 0) bottom right / var(--bracket) var(--bracket) no-repeat;
        transition: scale var(--duration-wipe) var(--ease-in-out);
      }

      &:hover, &:focus-visible {
        filter:
          drop-shadow(0 2px 3px color-mix(in oklch, var(--color-accent) 10%, transparent))
          drop-shadow(0 6px 14px color-mix(in oklch, var(--color-accent) 16%, transparent));
      }

      @media (prefers-reduced-motion: no-preference) {
        &:hover::after, &:focus-visible::after { scale: 1.04 1.13; }
      }
    }

    .pod-notice {
      padding: var(--space-4) var(--space-5);
      border: 1px dashed var(--color-border-strong);
      border-radius: var(--radius-sharp);
      color: var(--color-text-muted);
    }

    .player-card {
      position: sticky;
      inset-block-start: var(--header-h, 0px);
      z-index: 5;
      container: pod-player / inline-size;
      display: grid;
      gap: var(--space-3);
      padding: var(--space-4) var(--space-5);
    }

    .player-row {
      display: grid;
      grid-template-columns: auto minmax(0, 1fr);
      grid-template-areas: "toggle time" "tools tools";
      align-items: center;
      gap: var(--space-3) var(--space-4);

      .play-main { grid-area: toggle; }
    }

    .player-tools { grid-area: tools; display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

    @container pod-player (width >= 34rem) {
      .player-row { grid-template-columns: auto minmax(0, 1fr) auto; grid-template-areas: "toggle time tools"; }
    }

    .player-foot {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: var(--space-2) var(--space-3);
      padding-block-start: var(--space-3);
      border-block-start: 1px solid var(--color-border);

      .resume-note { margin-inline-end: auto; }
    }

    .transcript { display: grid; gap: var(--space-8); }

    .tsec { display: grid; gap: var(--space-4); }

    .tsec-body {
      display: grid;
      gap: 1.1em;
      font-size: var(--text-lg);
      line-height: 1.7;

      strong { font-weight: 600; }
    }

    .pod-end {
      display: grid;
      gap: var(--space-6);
      justify-items: start;
      padding-block-start: var(--space-6);
      border-block-start: 1px solid var(--color-border);
    }

    .disclaimer { font-size: var(--text-sm); color: var(--color-text-muted); }
  }

  @media (max-width: 32rem) {
    :is(.lib, .pod) {
      .page-title { font-size: var(--text-2xl); }

      .lede { font-size: var(--text-base); }
    }

    .lib {
      gap: var(--space-8);

      .track { --code-w: 2.75rem; }
    }

    .pod {
      gap: var(--space-6);

      .tsec-body { font-size: var(--text-base); }

      .player-card { padding: var(--space-4); }
    }
  }
}