/* Scroll chapter: one worker's attended window fanning into concurrent sessions. */
.worker-chapter {
  position: relative;
  height: 210vh;
  min-height: 1460px;
  padding: 0;
  overflow: clip;
  border-top: 0;
  background:
    radial-gradient(70% 80% at 85% 12%, rgba(183, 172, 255, 0.22), transparent 72%),
    radial-gradient(55% 68% at 8% 70%, rgba(171, 204, 255, 0.18), transparent 74%),
    #f7f6fb;
}

.worker-chapter__sticky {
  position: sticky;
  z-index: 2;
  top: 64px;
  display: flex;
  min-height: calc(100vh - 64px);
  align-items: center;
  padding: 34px 0 36px;
}

.worker-chapter__bridge {
  display: grid;
  grid-template-columns: auto minmax(60px, 1fr) auto;
  gap: 15px;
  align-items: center;
  margin-bottom: 20px;
  color: #5d5870;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.worker-chapter__bridge i {
  height: 1px;
  background: linear-gradient(90deg, rgba(74, 58, 167, 0.24), rgba(74, 58, 167, 0.7));
}

.worker-chapter__bridge span:last-child { color: #41358a; }

.worker-stage {
  position: relative;
  transform-origin: 76% 0;
}

.worker-stage__header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 44px;
  align-items: end;
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(36, 28, 82, 0.12);
}

.worker-stage__header .kicker {
  margin-bottom: 7px;
  color: #4a3aa7;
  font-size: 11px;
}

.worker-stage__header h2 {
  margin: 0;
  color: #181526;
  font-size: clamp(30px, 3.5vw, 44px);
  letter-spacing: -0.025em;
}

.worker-window {
  display: flex;
  gap: 34px;
  margin: 0;
}

.worker-window div { min-width: 124px; }

.worker-window dt {
  color: #716c7c;
  font-size: 9px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.worker-window dd {
  margin: 4px 0 0;
  color: #221b4d;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 750;
  white-space: nowrap;
}

.worker-timeline {
  position: relative;
  margin-top: 22px;
}

.worker-time-axis {
  position: relative;
  height: 22px;
  margin-left: 190px;
  color: #777180;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 650;
}

.worker-time-axis::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  content: "";
  background: rgba(42, 33, 91, 0.13);
}

.worker-time-axis span {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
}

.worker-time-axis span:nth-child(1) { left: 0; transform: none; }
.worker-time-axis span:nth-child(2) { left: 25%; }
.worker-time-axis span:nth-child(3) { left: 50%; }
.worker-time-axis span:nth-child(4) { left: 75%; }
.worker-time-axis span:nth-child(5) { right: 0; left: auto; transform: none; }

.session-trace {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  min-height: 47px;
}

.session-trace__label {
  display: flex;
  gap: 10px;
  align-items: center;
  color: #2c2836;
  font-size: 12px;
  white-space: nowrap;
}

.session-trace__label b {
  display: inline-block;
  min-width: 24px;
  color: #1f184d;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.session-trace__label small {
  display: block;
  margin-top: 1px;
  color: #777180;
  font-family: var(--mono);
  font-size: 9px;
}

.session-marker {
  position: relative;
  display: block;
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
}

.session-trace__track {
  position: relative;
  height: 30px;
}

.session-trace__track::before {
  position: absolute;
  top: 14px;
  right: 0;
  left: 0;
  height: 1px;
  content: "";
  background: rgba(42, 33, 91, 0.11);
}

.session-bar {
  position: absolute;
  z-index: 2;
  top: 7px;
  left: var(--session-start);
  width: var(--session-width);
  height: 15px;
  transform-origin: left center;
}

.session-trace--s1 { --session-start: 6.67%; --session-width: 41.11%; }
.session-trace--s2 { --session-start: 21.11%; --session-width: 55%; }
.session-trace--s3 { --session-start: 35.56%; --session-width: 32.22%; }
.session-trace--s4 { --session-start: 76.67%; --session-width: 20%; }

.session-trace--s1 .session-marker {
  background: #006da7;
  border-radius: 50%;
}

.session-trace--s1 .session-bar {
  background: #006da7;
  border-radius: 8px;
}

.session-trace--s2 .session-marker {
  background: #b74b00;
  border-radius: 1px;
}

.session-trace--s2 .session-bar {
  border: 1px solid #9e4100;
  border-radius: 2px;
  background: repeating-linear-gradient(135deg, #c75500 0 4px, #fff4e9 4px 8px);
}

.session-trace--s3 .session-marker {
  width: 9px;
  height: 9px;
  margin: 0 1px;
  background: #76518f;
  transform: rotate(45deg);
}

.session-trace--s3 .session-bar {
  border: 2px dashed #69427e;
  border-radius: 8px;
  background: rgba(118, 81, 143, 0.12);
}

.session-trace--s4 .session-marker {
  width: 0;
  height: 0;
  border-right: 6px solid transparent;
  border-bottom: 11px solid #8b6500;
  border-left: 6px solid transparent;
}

.session-trace--s4 .session-bar {
  border-top: 2px dotted #765600;
  border-bottom: 2px dotted #765600;
  background: radial-gradient(circle, #9b7100 1.3px, transparent 1.5px) 0 0 / 7px 7px;
}

.overlap-slice {
  position: absolute;
  z-index: 3;
  top: 2px;
  bottom: 2px;
  left: 35.56%;
  width: 12.22%;
  border-right: 1px solid rgba(48, 37, 112, 0.34);
  border-left: 1px solid rgba(48, 37, 112, 0.34);
  background: rgba(111, 92, 207, 0.12);
  opacity: 0;
}

.worker-overlap {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
  min-height: 31px;
  margin-top: 5px;
  color: #514b61;
  font-family: var(--mono);
  font-size: 10px;
}

.worker-overlap b { color: #342878; }

.worker-overlap__markers {
  display: flex;
  align-items: center;
}

.worker-overlap__markers i {
  display: block;
  width: 8px;
  height: 8px;
  margin-left: -2px;
  border: 1px solid #fff;
  background: #4a3aa7;
  border-radius: 50%;
}

.worker-summary {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 15px;
  align-items: center;
  margin-top: 16px;
  padding-top: 17px;
  border-top: 1px solid rgba(36, 28, 82, 0.13);
}

.worker-summary p {
  color: #262032;
  font-family: var(--mono);
  font-size: clamp(11px, 1.2vw, 13px);
  font-weight: 750;
}

.worker-summary p i {
  margin: 0 5px;
  color: #8a8391;
  font-style: normal;
}

.worker-summary > span { color: #4a3aa7; }

.worker-summary strong {
  color: #392d83;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
}

.worker-sr-only {
  position: fixed;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  overflow-wrap: anywhere;
  white-space: normal;
  border: 0;
}

.worker-sentinel {
  position: absolute;
  left: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.worker-sentinel--1 { top: 14vh; }
.worker-sentinel--2 { top: 58vh; }
.worker-sentinel--3 { top: 105vh; }
.worker-sentinel--4 { top: 154vh; }

@media (prefers-reduced-motion: no-preference) {
  .worker-chapter.worker-ready .worker-reveal {
    opacity: 0;
    transform: translateY(12px);
    transition:
      opacity 520ms ease,
      transform 620ms cubic-bezier(.2, .7, .2, 1);
  }

  .worker-chapter.worker-ready .worker-stage {
    transform: scale(0.982);
    transition: transform 900ms cubic-bezier(.2, .7, .2, 1);
  }

  .worker-chapter.worker-ready.has-worker-stage-1 .worker-stage { transform: scale(1); }

  .worker-chapter.worker-ready.has-worker-stage-1 [data-worker-part="1"],
  .worker-chapter.worker-ready.has-worker-stage-2 [data-worker-part="2"],
  .worker-chapter.worker-ready.has-worker-stage-3 [data-worker-part="3"],
  .worker-chapter.worker-ready.has-worker-stage-4 [data-worker-part="4"] {
    opacity: 1;
    transform: translateY(0);
  }

  .worker-chapter.worker-ready .session-bar {
    transform: scaleX(0);
    transition: transform 760ms cubic-bezier(.25, .72, .2, 1);
  }

  .worker-chapter.worker-ready.has-worker-stage-3 .session-bar { transform: scaleX(1); }

  .worker-chapter.worker-ready .session-trace:nth-of-type(2),
  .worker-chapter.worker-ready .session-trace:nth-of-type(2) .session-bar { transition-delay: 80ms; }
  .worker-chapter.worker-ready .session-trace:nth-of-type(3),
  .worker-chapter.worker-ready .session-trace:nth-of-type(3) .session-bar { transition-delay: 230ms; }
  .worker-chapter.worker-ready .session-trace:nth-of-type(4),
  .worker-chapter.worker-ready .session-trace:nth-of-type(4) .session-bar { transition-delay: 380ms; }
  .worker-chapter.worker-ready .session-trace:nth-of-type(5),
  .worker-chapter.worker-ready .session-trace:nth-of-type(5) .session-bar { transition-delay: 530ms; }

  .worker-chapter.worker-ready .overlap-slice {
    transition: opacity 500ms ease;
  }

  .worker-chapter.worker-ready.has-worker-stage-4 .overlap-slice { opacity: 1; }
}

@media (max-width: 760px) {
  .worker-chapter {
    height: 235svh;
    min-height: 1650px;
  }

  .worker-chapter__sticky {
    min-height: calc(100svh - 64px);
    padding: 20px 0 24px;
  }

  .worker-chapter__bridge {
    grid-template-columns: auto minmax(24px, 1fr) minmax(112px, auto);
    gap: 9px;
    margin-bottom: 14px;
    font-size: 8px;
  }

  .worker-chapter__bridge span:last-child { text-align: right; }

  .worker-stage__header {
    grid-template-columns: 1fr;
    gap: 13px;
    padding-bottom: 14px;
  }

  .worker-stage__header .kicker {
    margin-bottom: 4px;
    font-size: 9px;
  }

  .worker-stage__header h2 { font-size: clamp(27px, 8vw, 31px); }

  .worker-window {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .worker-window div { min-width: 0; }
  .worker-window dd { font-size: 13px; }

  .worker-timeline { margin-top: 14px; }

  .worker-time-axis {
    height: 19px;
    margin-left: 0;
    font-size: 7.5px;
  }

  .session-trace {
    display: block;
    min-height: 0;
    margin-top: 7px;
  }

  .session-trace__label {
    gap: 8px;
    font-size: 11px;
  }

  .session-trace__label span { flex: 1; }

  .session-trace__label small {
    display: inline;
    float: right;
    margin-top: 1px;
    font-size: 8px;
  }

  .session-trace__track { height: 25px; }
  .session-trace__track::before { top: 12px; }
  .session-bar { top: 5px; height: 15px; }
  .overlap-slice { top: 0; bottom: 0; }

  .worker-overlap {
    justify-content: flex-start;
    margin-top: 8px;
    font-size: 9px;
  }

  .worker-summary {
    grid-template-columns: 1fr auto;
    gap: 8px;
    margin-top: 10px;
    padding-top: 12px;
  }

  .worker-summary p {
    grid-column: 1 / -1;
    font-size: 10px;
    line-height: 1.5;
  }

  .worker-summary > span { justify-self: end; }
  .worker-summary strong { font-size: 15px; }

  .worker-sentinel--1 { top: 10vh; }
  .worker-sentinel--2 { top: 60vh; }
  .worker-sentinel--3 { top: 118vh; }
  .worker-sentinel--4 { top: 176vh; }
}

@media (max-width: 390px) {
  .worker-chapter__bridge span:first-child { max-width: 74px; }
  .worker-summary p i { margin: 0 2px; }
}

@media (prefers-reduced-motion: reduce) {
  .worker-chapter,
  .worker-chapter * {
    scroll-behavior: auto;
    transition: none !important;
  }

  .worker-chapter {
    height: auto;
    min-height: 0;
  }

  .worker-chapter__sticky {
    position: relative;
    top: auto;
    min-height: 0;
    padding: 72px 0;
  }

  .worker-sentinel { display: none; }
}