:root {
  --background: #0f1412;
  --surface: #151b18;
  --surface-raised: #202821;
  --panel: #111714;
  --text: #edf2ea;
  --muted: #9ba89d;
  --line: #35433b;
  --grid: #26322c;
  --accent: #4fb7a5;
  --accent2: #d4b45f;
  --accent3: #f0705a;
  --accent4: #81c7d4;
  --shadow: rgba(0, 0, 0, 0.42);
  --type-event: var(--accent3);
  --type-process: var(--accent);
  --type-period: var(--accent2);
  --type-phenomenon: var(--accent4);
  --type-structure: var(--accent2);
  --body-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono-font: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  color: var(--text);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--grid) 18%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--grid) 14%, transparent) 1px, transparent 1px),
    var(--background);
  background-size: 44px 44px;
  font-family: var(--body-font);
  letter-spacing: 0;
}

body.is-broadcast-mode {
  overflow: hidden;
  background: transparent;
}

body.is-broadcast-mode.broadcast-bg-solid {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--grid) 18%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--grid) 14%, transparent) 1px, transparent 1px),
    var(--background);
  background-size: 44px 44px;
}

body.is-broadcast-mode.broadcast-bg-chroma {
  background: #00b140;
}

button,
input,
select {
  font: inherit;
}

button {
  color: inherit;
}

a {
  color: var(--accent4);
}

.app-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100%;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: 0 14px 32px var(--shadow);
  z-index: 20;
}

.app-topbar {
  position: relative;
}

.brand-block {
  display: flex;
  align-items: center;
  min-width: 180px;
  gap: 12px;
}

.brand-link {
  color: var(--text);
  text-decoration: none;
}

.brand-title {
  display: block;
  color: var(--text);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.05;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid color-mix(in srgb, var(--accent2) 62%, var(--line));
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-raised) 80%, var(--accent) 20%), var(--panel));
  color: var(--accent2);
  font-family: var(--mono-font);
  font-weight: 800;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--text) 9%, transparent);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 11px;
  line-height: 1.1;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin: 0;
  font-size: 21px;
  line-height: 1.05;
}

.topbar-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.primary-nav {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid color-mix(in srgb, var(--line) 88%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
}

.primary-nav a {
  display: inline-grid;
  min-height: 32px;
  place-items: center;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.primary-nav a:hover,
.primary-nav a:focus-visible,
.primary-nav a[aria-current="page"] {
  border-color: color-mix(in srgb, var(--accent) 46%, var(--line));
  background: color-mix(in srgb, var(--accent) 14%, var(--surface));
  color: var(--text);
  outline: none;
}

.platform-shell {
  min-height: 100%;
}

.platform-page {
  min-height: 0;
  overflow: auto;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--grid) 18%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--grid) 14%, transparent) 1px, transparent 1px),
    var(--background);
  background-size: 44px 44px;
}

.platform-hero {
  position: relative;
  display: grid;
  align-items: center;
  min-height: min(640px, calc(100svh - 224px));
  overflow: hidden;
  padding: clamp(52px, 7vw, 92px) clamp(18px, 6vw, 86px);
  isolation: isolate;
}

.landing-hero::before {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, var(--background) 0%, color-mix(in srgb, var(--background) 88%, transparent) 34%, color-mix(in srgb, var(--background) 20%, transparent) 72%),
    linear-gradient(180deg, color-mix(in srgb, var(--background) 20%, transparent), var(--background) 100%),
    url("../assets/histui-hero.png") center / cover no-repeat;
  content: "";
}

.landing-hero::after {
  position: absolute;
  inset: auto 0 0;
  z-index: -1;
  height: 42%;
  background: linear-gradient(180deg, transparent, var(--background));
  content: "";
}

.hero-copy {
  max-width: 760px;
}

.hero-copy h1,
.page-hero h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(48px, 9vw, 116px);
  line-height: 0.92;
  letter-spacing: 0;
}

.hero-lede,
.page-hero p,
.split-copy p,
.narrative-band p,
.about-layout p,
.platform-card p {
  color: color-mix(in srgb, var(--muted) 92%, var(--text));
  font-size: 16px;
  line-height: 1.7;
}

.hero-lede {
  max-width: 650px;
  margin: 24px 0 0;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.48;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary-action,
.secondary-action,
.nav-cta {
  display: inline-grid;
  min-height: 42px;
  place-items: center;
  border-radius: 7px;
  font-weight: 760;
  text-decoration: none;
}

.primary-action {
  padding: 0 18px;
  border: 1px solid color-mix(in srgb, var(--accent2) 68%, var(--line));
  background: color-mix(in srgb, var(--accent2) 22%, var(--surface));
  color: var(--text);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--shadow) 70%, transparent);
}

.secondary-action,
.nav-cta {
  padding: 0 16px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-raised) 78%, transparent);
  color: var(--text);
}

.hero-metrics {
  position: absolute;
  right: clamp(18px, 5vw, 74px);
  bottom: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  max-width: min(720px, calc(100% - 36px));
}

.hero-metrics span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 11px;
}

.hero-metrics strong {
  color: var(--accent2);
  font-size: 14px;
}

.language-strip {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: min(1180px, calc(100% - 36px));
  margin: 14px auto 0;
  padding-block: 10px clamp(22px, 4vw, 42px);
}

.language-strip span {
  display: inline-grid;
  min-height: 34px;
  place-items: center;
  padding: 5px 11px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: color-mix(in srgb, var(--muted) 86%, var(--text));
  font-size: 12px;
  line-height: 1.35;
}

.language-strip span:last-child {
  border-color: color-mix(in srgb, var(--accent4) 48%, var(--line));
  color: var(--accent4);
}

.platform-band,
.platform-grid,
.about-layout,
.builder-shell {
  width: min(1180px, calc(100% - 36px));
  margin-inline: auto;
}

.platform-band {
  padding: clamp(34px, 6vw, 70px) 0;
}

.section-kicker {
  margin-bottom: 12px;
  color: var(--accent2);
  font-family: var(--mono-font);
  font-size: 12px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.split-copy {
  display: grid;
  grid-template-columns: minmax(260px, 0.74fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 74px);
  align-items: start;
}

.split-copy h2,
.narrative-band h2,
.about-layout h2,
.builder-panel h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 50px);
  line-height: 1.02;
}

.split-copy p,
.narrative-band p {
  margin: 0;
  max-width: 720px;
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding-bottom: clamp(32px, 5vw, 70px);
}

.platform-card,
.builder-panel,
.about-layout article {
  border: 1px solid color-mix(in srgb, var(--line) 86%, transparent);
  border-radius: 8px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-raised) 76%, transparent), color-mix(in srgb, var(--panel) 92%, transparent));
  box-shadow: 0 18px 40px color-mix(in srgb, var(--shadow) 54%, transparent);
}

.platform-card {
  min-height: 214px;
  padding: 20px;
}

.card-rule {
  display: block;
  width: 48px;
  height: 2px;
  margin-bottom: 24px;
  background: linear-gradient(90deg, var(--accent), var(--accent2), var(--accent3));
}

.platform-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.platform-card p {
  margin: 0;
  font-size: 14px;
}

.narrative-band {
  display: grid;
  grid-template-columns: minmax(280px, 0.76fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
  border-top: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
}

.page-hero {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(44px, 7vw, 86px) 0 clamp(28px, 5vw, 56px);
}

.compact-hero h1 {
  max-width: 960px;
  font-size: clamp(42px, 7vw, 82px);
}

.compact-hero p:last-child {
  max-width: 780px;
  margin: 20px 0 0;
}

.builder-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 56px;
}

.builder-sidebar,
.builder-workspace {
  display: grid;
  gap: 10px;
  align-content: start;
}

.builder-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 52px;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 76%, transparent);
  color: var(--muted);
}

.builder-step span {
  color: var(--accent2);
  font-family: var(--mono-font);
  font-size: 12px;
}

.builder-step.is-active {
  border-color: color-mix(in srgb, var(--accent) 58%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--surface));
  color: var(--text);
}

.builder-panel {
  padding: 18px;
}

.builder-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.builder-form-grid .wide {
  grid-column: 1 / -1;
}

.builder-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.builder-actions button:disabled,
.builder-form-grid input:disabled {
  opacity: 0.7;
}

.about-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding-bottom: 64px;
}

.about-layout article {
  padding: 20px;
}

.about-layout h2 {
  margin-bottom: 16px;
  font-size: 28px;
}

.about-layout p {
  margin: 0 0 14px;
  font-size: 14px;
}

.workspace {
  display: grid;
  grid-template-columns: 316px minmax(0, 1fr) 376px;
  gap: 0;
  min-height: 0;
}

.control-panel,
.inspector {
  min-height: 0;
  overflow: auto;
  border-color: var(--line);
  background: color-mix(in srgb, var(--panel) 94%, transparent);
}

.control-panel {
  border-inline-end: 1px solid var(--line);
  padding: 16px;
}

.inspector {
  border-inline-start: 1px solid var(--line);
}

.timeline-workbench {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  min-width: 0;
  min-height: 0;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 44%, transparent), transparent 34%),
    color-mix(in srgb, var(--background) 94%, var(--surface));
}

.timeline-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 82%, transparent);
}

.timeline-title {
  min-width: 0;
}

.timeline-title h2 {
  margin: 0 0 5px;
  max-width: 860px;
  overflow: hidden;
  font-size: 19px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-title p:last-child {
  display: -webkit-box;
  margin: 0;
  max-width: 920px;
  overflow: hidden;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.timeline-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-stage {
  position: relative;
  min-height: 0;
  overflow: hidden;
  cursor: grab;
  touch-action: none;
  outline: none;
  user-select: none;
}

.timeline-stage:focus-visible {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.timeline-stage.is-dragging {
  cursor: grabbing;
}

.timeline-stage.has-hit-hover {
  cursor: pointer;
}

.timeline-stage.is-explode-mode {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--accent4) 7%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--accent2) 6%, transparent) 1px, transparent 1px);
  background-size: 32px 32px;
}

.timeline-cards {
  position: absolute;
  inset: 0;
}

.timeline-cards {
  pointer-events: none;
}

.event-card {
  position: absolute;
  left: var(--x);
  top: var(--y);
  z-index: var(--card-z, 10);
  width: 284px;
  max-width: min(284px, calc(100vw - 42px));
  max-height: 188px;
  padding: 12px;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--record-color) 55%, var(--line));
  border-radius: 8px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-raised) 92%, var(--record-color) 8%), var(--surface));
  box-shadow: 0 18px 40px var(--shadow);
  color: var(--text);
  pointer-events: auto;
  text-align: start;
  transform: translate(var(--shift-x), var(--shift-y));
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    filter 180ms ease,
    transform 180ms ease,
    background 180ms ease;
  animation: card-enter 180ms ease both;
}

.timeline-stage.is-dragging .event-card,
.timeline-stage.is-viewport-moving .event-card,
.event-card.is-motion-card {
  opacity: 1;
  transition:
    border-color 120ms ease,
    box-shadow 120ms ease,
    filter 120ms ease,
    background 120ms ease;
  animation: none;
}

.event-card:hover,
.event-card:focus-visible,
.event-card.is-hovered,
.event-card.is-selected {
  z-index: 200;
  border-color: var(--record-color);
  box-shadow:
    0 20px 42px var(--shadow),
    0 0 0 1px color-mix(in srgb, var(--record-color) 28%, transparent);
  filter: saturate(1.08);
  transform: translate(var(--shift-x), var(--shift-y)) scale(1.025);
}

.event-card.is-cluster-expanded {
  border-color: color-mix(in srgb, var(--record-color) 72%, var(--accent2));
  box-shadow:
    0 18px 40px var(--shadow),
    0 0 0 1px color-mix(in srgb, var(--accent2) 24%, transparent);
}

.event-card.is-exploded {
  width: var(--card-width);
  max-height: var(--card-max-height);
  padding: 10px;
  border-color: color-mix(in srgb, var(--record-color) 68%, var(--accent4));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-raised) 86%, var(--record-color) 14%), color-mix(in srgb, var(--surface) 92%, var(--background)));
  box-shadow:
    0 18px 34px color-mix(in srgb, var(--shadow) 86%, transparent),
    0 0 0 1px color-mix(in srgb, var(--record-color) 18%, transparent),
    inset 0 1px 0 color-mix(in srgb, var(--text) 10%, transparent);
}

.event-card.is-exploded::before {
  position: absolute;
  inset-inline: 10px;
  top: 6px;
  height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--record-color) 72%, var(--accent4)), transparent);
  content: "";
  opacity: 0.78;
}

.event-card.is-exploding-card {
  animation: explode-card var(--explode-duration) cubic-bezier(0.16, 0.84, 0.28, 1) both;
  animation-delay: var(--explode-delay);
}

.event-card:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--record-color) 72%, white);
  outline-offset: 2px;
}

.event-card.mode-icon {
  width: 176px;
  max-height: 92px;
  padding: 9px 10px;
}

.event-card.mode-short {
  width: 222px;
  max-height: 126px;
}

.event-card.is-exploded {
  width: var(--card-width);
  max-height: var(--card-max-height);
}

.event-card.is-exploded .card-date {
  margin-bottom: 4px;
}

.event-card.is-exploded .card-title {
  margin-bottom: 6px;
  font-size: 12px;
}

.event-card.is-exploded .card-meta {
  gap: 4px;
  font-size: 9px;
}

.event-card.is-exploded .card-meta > span,
.event-card.is-exploded .card-chip {
  padding: 1px 5px;
}

.card-date {
  display: block;
  margin-bottom: 6px;
  color: var(--accent2);
  font-family: var(--mono-font);
  font-size: 11px;
  line-height: 1.3;
}

.card-title {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  min-width: 0;
  margin-bottom: 8px;
  font-weight: 760;
  line-height: 1.2;
}

.card-title > span:last-child {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.card-emoji {
  flex: 0 0 auto;
}

.card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 10px;
  line-height: 1.35;
}

.card-meta > span,
.card-chip {
  padding: 2px 6px;
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 76%, transparent);
}

.event-card p {
  display: -webkit-box;
  margin: 8px 0 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.stage-hint {
  position: absolute;
  inset-block-end: 12px;
  inset-inline-start: 14px;
  z-index: 4;
  max-width: min(560px, calc(100% - 28px));
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 11px;
  line-height: 1.3;
  pointer-events: none;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.cluster-tooltip {
  position: absolute;
  z-index: 260;
  width: min(260px, calc(100% - 28px));
  padding: 10px 11px;
  border: 1px solid color-mix(in srgb, var(--accent2) 58%, var(--line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface-raised) 95%, var(--accent2) 5%);
  box-shadow:
    0 18px 34px var(--shadow),
    0 0 0 1px color-mix(in srgb, var(--text) 8%, transparent);
  color: var(--text);
  font-size: 12px;
  line-height: 1.35;
  pointer-events: none;
  transform: translate(-50%, -100%);
  animation: tooltip-enter 150ms ease both;
}

.cluster-tooltip[hidden] {
  display: none;
}

.cluster-tooltip[data-placement="below"] {
  transform: translate(-50%, 0);
}

.cluster-tooltip strong,
.cluster-tooltip span {
  display: block;
}

.cluster-tooltip strong {
  margin-bottom: 7px;
  color: var(--accent2);
  font-family: var(--mono-font);
  font-size: 11px;
  text-transform: uppercase;
}

.cluster-tooltip ul {
  display: grid;
  gap: 3px;
  margin: 0 0 7px;
  padding-inline-start: 16px;
  color: var(--muted);
}

.cluster-tooltip span {
  color: var(--accent4);
  font-family: var(--mono-font);
  font-size: 11px;
}

.timeline-zoom-bar {
  position: relative;
  min-height: 76px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 80%, transparent), color-mix(in srgb, var(--panel) 92%, transparent)),
    var(--panel);
  cursor: crosshair;
  outline: none;
  touch-action: none;
  user-select: none;
}

.timeline-zoom-bar:focus-visible {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.timeline-zoom-bar.is-pan {
  cursor: grabbing;
}

.timeline-zoom-bar.is-start,
.timeline-zoom-bar.is-end {
  cursor: ew-resize;
}

.zoom-bar-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.zoom-window,
.zoom-selection {
  position: absolute;
  top: 14px;
  bottom: 17px;
  border-radius: 8px;
  pointer-events: none;
}

.zoom-window {
  z-index: 3;
  border: 1px solid color-mix(in srgb, var(--accent) 72%, var(--line));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--accent) 16%, transparent), color-mix(in srgb, var(--accent4) 8%, transparent));
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--text) 8%, transparent),
    0 10px 26px color-mix(in srgb, var(--shadow) 66%, transparent);
  cursor: crosshair;
  pointer-events: auto;
}

.timeline-zoom-bar:not(.is-interacting) .zoom-window {
  transition:
    left 180ms ease,
    width 180ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.timeline-zoom-bar.is-selecting .zoom-window {
  opacity: 0.72;
}

.zoom-window-label {
  position: absolute;
  left: 50%;
  top: -13px;
  max-width: min(220px, calc(100vw - 80px));
  overflow: hidden;
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 10px;
  line-height: 1;
  text-overflow: ellipsis;
  transform: translateX(-50%);
  white-space: nowrap;
  pointer-events: none;
}

.zoom-handle {
  position: absolute;
  top: -5px;
  bottom: -5px;
  z-index: 4;
  width: 16px;
  border: 1px solid color-mix(in srgb, var(--accent2) 72%, var(--line));
  border-radius: 7px;
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-raised) 82%, var(--accent2) 18%), var(--surface));
  box-shadow:
    0 8px 16px color-mix(in srgb, var(--shadow) 68%, transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--text) 8%, transparent);
  cursor: ew-resize;
  pointer-events: auto;
}

.zoom-handle::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px;
  height: 18px;
  border-inline: 1px solid color-mix(in srgb, var(--accent2) 72%, var(--muted));
  content: "";
  opacity: 0.72;
  transform: translate(-50%, -50%);
}

.zoom-handle:hover,
.zoom-handle:focus-visible {
  border-color: var(--accent2);
  outline: none;
  box-shadow:
    0 8px 18px color-mix(in srgb, var(--shadow) 70%, transparent),
    0 0 0 2px color-mix(in srgb, var(--accent2) 24%, transparent);
}

.zoom-handle-start {
  left: -8px;
}

.zoom-handle-end {
  right: -8px;
}

.zoom-selection {
  z-index: 5;
  border: 1px dashed var(--accent2);
  background: color-mix(in srgb, var(--accent2) 15%, transparent);
  box-shadow:
    inset 0 0 0 1px color-mix(in srgb, var(--background) 36%, transparent),
    0 0 24px color-mix(in srgb, var(--accent2) 14%, transparent);
  animation: zoom-selection-enter 120ms ease both;
}

.zoom-selection[hidden] {
  display: none;
}

.zoom-labels {
  position: absolute;
  right: 18px;
  bottom: 5px;
  left: 18px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 10px;
  line-height: 1;
  pointer-events: none;
}

@keyframes card-enter {
  from {
    opacity: 0;
    transform: translate(var(--shift-x), var(--shift-y)) scale(0.985);
  }

  to {
    opacity: 1;
    transform: translate(var(--shift-x), var(--shift-y)) scale(1);
  }
}

@keyframes explode-card {
  0% {
    opacity: 0;
    filter: blur(2px) saturate(0.78);
    transform: translate(calc(var(--shift-x) + var(--explode-from-x)), calc(var(--shift-y) + var(--explode-from-y))) scale(0.72);
  }

  62% {
    opacity: 1;
    filter: blur(0) saturate(1.08);
    transform: translate(calc(var(--shift-x) + var(--explode-over-x)), calc(var(--shift-y) + var(--explode-over-y))) scale(1.035);
  }

  100% {
    opacity: 1;
    filter: blur(0) saturate(1);
    transform: translate(var(--shift-x), var(--shift-y)) scale(1);
  }
}

@keyframes tooltip-enter {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes zoom-selection-enter {
  from {
    opacity: 0;
    transform: scaleY(0.92);
  }

  to {
    opacity: 1;
    transform: scaleY(1);
  }
}

.select-field,
.field {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
}

.select-field select,
.field input {
  min-height: 34px;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-raised);
  color: var(--text);
  outline: none;
}

.select-field select {
  padding: 0 34px 0 10px;
}

.select-field select option:disabled {
  color: color-mix(in srgb, var(--muted) 58%, transparent);
  background: color-mix(in srgb, var(--surface-raised) 82%, var(--background));
}

[dir="rtl"] .select-field select {
  padding: 0 10px 0 34px;
}

.field input {
  padding: 0 10px;
}

.select-field select:focus,
.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 25%, transparent);
}

.select-field.compact {
  width: 138px;
}

.select-field.micro {
  width: 138px;
  font-size: 11px;
}

.segmented {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.segment,
.icon-button,
.text-button,
.viewport-chip,
.toggle-pill {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-raised);
  color: var(--text);
}

.segment {
  display: inline-grid;
  min-height: 28px;
  place-items: center;
  padding: 0 10px;
  border-color: transparent;
  background: transparent;
  color: var(--muted);
  text-decoration: none;
}

.segment.is-active {
  border-color: color-mix(in srgb, var(--accent) 54%, var(--line));
  background: color-mix(in srgb, var(--accent) 18%, var(--surface));
  color: var(--text);
}

.broadcast-entry {
  border-color: color-mix(in srgb, var(--accent4) 54%, var(--line));
}

.broadcast-entry.is-active {
  border-color: color-mix(in srgb, var(--accent2) 70%, var(--line));
  background: color-mix(in srgb, var(--accent2) 18%, var(--surface-raised));
  color: var(--text);
}

.package-timeline-mount {
  display: block;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.package-timeline-mount .histui-timeline {
  height: 100% !important;
  min-height: 0 !important;
}

.package-timeline-mount .histui-timeline-workbench {
  height: 100% !important;
  min-height: 0 !important;
}

.package-timeline-mount .timeline-stage {
  min-height: 0;
}

.package-workbench {
  grid-template-rows: auto minmax(0, 1fr);
}

.icon-button {
  display: grid;
  place-items: center;
  width: 36px;
  padding: 0;
  font-family: var(--mono-font);
  font-weight: 760;
}

.text-button {
  padding: 0 12px;
}

.text-button.subtle {
  min-height: 30px;
  color: var(--muted);
}

.filters-button {
  display: none;
}

.viewport-chip {
  display: inline-grid;
  place-items: center;
  padding: 0 10px;
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 11px;
}

.toggle-pill,
.toggle-row {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 10px;
  color: var(--muted);
  font-size: 12px;
}

.toggle-pill input,
.toggle-row input,
.check-row input {
  accent-color: var(--accent);
}

.broadcast-dock,
.broadcast-panel {
  display: none;
}

.app-shell.is-broadcast-mode {
  grid-template-rows: minmax(0, 1fr);
  height: 100vh;
  min-height: 100vh;
  overflow: hidden;
  background: transparent;
}

.app-shell.is-broadcast-mode .app-topbar,
.app-shell.is-broadcast-mode .control-panel,
.app-shell.is-broadcast-mode .timeline-head,
.app-shell.is-broadcast-mode .inspector {
  display: none;
}

.app-shell.is-broadcast-mode .viewer-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  width: 100vw;
  height: 100vh;
  min-height: 100vh;
  overflow: hidden;
  background: transparent;
}

.app-shell.is-broadcast-mode .timeline-workbench {
  min-width: 0;
  min-height: 0;
  background: transparent;
}

.app-shell.is-broadcast-mode .package-workbench {
  grid-template-rows: minmax(0, 1fr);
}

.app-shell.is-broadcast-mode .package-timeline-mount,
.app-shell.is-broadcast-mode .package-timeline-mount .histui-timeline,
.app-shell.is-broadcast-mode .package-timeline-mount .histui-timeline-workbench {
  height: 100% !important;
  min-height: 0 !important;
}

.app-shell.is-broadcast-mode.broadcast-bg-transparent .package-timeline-mount .histui-timeline,
.app-shell.is-broadcast-mode.broadcast-bg-transparent .package-timeline-mount .histui-timeline-workbench,
.app-shell.is-broadcast-mode.broadcast-bg-chroma .package-timeline-mount .histui-timeline,
.app-shell.is-broadcast-mode.broadcast-bg-chroma .package-timeline-mount .histui-timeline-workbench {
  background: transparent;
}

.app-shell.is-broadcast-mode.broadcast-bg-solid .package-timeline-mount .histui-timeline-workbench {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--grid) 18%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--grid) 14%, transparent) 1px, transparent 1px),
    color-mix(in srgb, var(--background) 96%, var(--surface));
  background-size: 44px 44px;
}

.app-shell.is-broadcast-mode .package-timeline-mount .event-card {
  width: 320px;
  max-width: min(320px, calc(100vw - 42px));
  max-height: 214px;
  border-color: color-mix(in srgb, var(--record-color) 68%, var(--text));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface-raised) 88%, var(--record-color) 12%), color-mix(in srgb, var(--surface) 92%, transparent));
  box-shadow:
    0 22px 52px color-mix(in srgb, var(--shadow) 92%, transparent),
    0 0 0 1px color-mix(in srgb, var(--record-color) 24%, transparent);
}

.app-shell.is-broadcast-mode .package-timeline-mount .event-card.mode-short {
  width: 246px;
  max-height: 146px;
}

.app-shell.is-broadcast-mode .package-timeline-mount .event-card.mode-icon {
  width: 188px;
}

.app-shell.is-broadcast-mode .package-timeline-mount .card-title {
  font-size: 15px;
}

.app-shell.is-broadcast-mode .package-timeline-mount .event-card p {
  font-size: 13px;
}

.app-shell.is-broadcast-mode .broadcast-dock {
  position: fixed;
  inset-block-start: 12px;
  inset-inline-end: 12px;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px;
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 82%, transparent);
  box-shadow: 0 18px 42px var(--shadow);
  opacity: 0.24;
  backdrop-filter: blur(14px);
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    border-color 180ms ease;
}

.app-shell.is-broadcast-mode .broadcast-dock:hover,
.app-shell.is-broadcast-mode .broadcast-dock:focus-within,
.app-shell.is-broadcast-mode.broadcast-settings-open .broadcast-dock {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  opacity: 1;
  transform: translateY(2px);
}

.broadcast-live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--accent3) 62%, var(--line));
  border-radius: 7px;
  background: color-mix(in srgb, var(--accent3) 16%, var(--surface-raised));
  color: var(--text);
  font-family: var(--mono-font);
  font-size: 11px;
  text-transform: uppercase;
}

.broadcast-live-indicator::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent3);
  box-shadow: 0 0 16px color-mix(in srgb, var(--accent3) 72%, transparent);
  content: "";
}

.broadcast-panel {
  position: fixed;
  inset-block-start: 68px;
  inset-inline-end: 12px;
  z-index: 95;
  width: min(380px, calc(100vw - 24px));
  max-height: calc(100vh - 88px);
  overflow: auto;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--accent) 46%, var(--line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: 0 24px 62px var(--shadow);
  backdrop-filter: blur(18px);
}

.broadcast-panel.is-open {
  display: grid;
  gap: 13px;
  animation: broadcast-panel-enter 180ms cubic-bezier(0.16, 0.84, 0.28, 1) both;
}

.broadcast-panel[hidden] {
  display: none;
}

.broadcast-panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.broadcast-panel-head h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.broadcast-note,
.broadcast-url {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.broadcast-url {
  padding: 9px 10px;
  overflow-wrap: anywhere;
  border: 1px solid color-mix(in srgb, var(--line) 76%, transparent);
  border-radius: 7px;
  background: color-mix(in srgb, var(--panel) 74%, transparent);
  font-family: var(--mono-font);
}

.broadcast-panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.app-shell.is-broadcast-mode.broadcast-show-inspector .inspector {
  position: fixed;
  inset-block: 78px 28px;
  inset-inline-end: 18px;
  z-index: 70;
  display: block;
  width: min(390px, 32vw);
  min-height: 0;
  overflow: auto;
  border: 1px solid color-mix(in srgb, var(--accent4) 38%, var(--line));
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  box-shadow: 0 24px 62px var(--shadow);
  backdrop-filter: blur(18px);
}

.app-shell.is-broadcast-mode.broadcast-preset-teaching {
  --broadcast-card-scale: 1;
}

.app-shell.is-broadcast-mode.broadcast-preset-cinematic .package-timeline-mount .histui-timeline-workbench {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--grid) 22%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--grid) 18%, transparent) 1px, transparent 1px),
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 42%, transparent), color-mix(in srgb, var(--background) 70%, transparent));
  background-size: 52px 52px, 52px 52px, auto;
}

.app-shell.is-broadcast-mode.broadcast-preset-lower-third .viewer-workspace {
  align-items: end;
}

.app-shell.is-broadcast-mode.broadcast-preset-lower-third .timeline-workbench {
  align-self: end;
  width: 100%;
  height: min(420px, 42vh);
  min-height: min(420px, 42vh);
  border-block-start: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  background: color-mix(in srgb, var(--background) 52%, transparent);
  box-shadow: 0 -22px 48px color-mix(in srgb, var(--shadow) 72%, transparent);
}

@keyframes broadcast-panel-enter {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.985);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.panel-heading h2 {
  margin: 0;
  font-size: 16px;
  line-height: 1.2;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}

.range-field,
.switch-stack,
.facet-group {
  margin-top: 14px;
}

.range-field input {
  padding: 0;
}

.switch-stack {
  display: grid;
  gap: 8px;
}

.toggle-row {
  justify-content: flex-start;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
}

.facet-group {
  padding-top: 12px;
  border-top: 1px solid color-mix(in srgb, var(--line) 75%, transparent);
}

.facet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.facet-head h3 {
  margin: 0;
  color: var(--text);
  font-size: 13px;
  line-height: 1.2;
}

.facet-head button {
  min-height: 24px;
  margin-inline-start: 3px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
}

.facet-list {
  display: grid;
  gap: 5px;
}

.check-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  min-height: 30px;
  padding: 4px 7px;
  border: 1px solid transparent;
  border-radius: 7px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
}

.check-row:hover {
  border-color: var(--line);
  background: color-mix(in srgb, var(--surface) 58%, transparent);
}

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

.check-row small {
  color: var(--accent2);
  font-family: var(--mono-font);
  font-size: 10px;
}

.record-detail {
  padding: 16px;
}

.detail-hero {
  margin: -16px -16px 16px;
  padding: 18px 16px 16px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-raised) 88%, var(--accent) 12%), var(--panel));
}

.detail-hero.type-event {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-raised) 86%, var(--type-event) 14%), var(--panel));
}

.detail-hero.type-process {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-raised) 86%, var(--type-process) 14%), var(--panel));
}

.detail-hero.type-period,
.detail-hero.type-structure {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-raised) 86%, var(--type-period) 14%), var(--panel));
}

.detail-hero.type-phenomenon {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--surface-raised) 86%, var(--type-phenomenon) 14%), var(--panel));
}

.detail-hero h2 {
  margin: 0 0 10px;
  font-size: 23px;
  line-height: 1.18;
}

.detail-date {
  margin: 0 0 12px;
  color: var(--accent2);
  font-family: var(--mono-font);
  font-size: 12px;
  line-height: 1.35;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip-row span {
  padding: 4px 8px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 64%, transparent);
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 11px;
}

.detail-section {
  padding: 14px 0;
  border-top: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
}

.detail-section:first-of-type {
  border-top: 0;
}

.detail-section h3 {
  margin: 0 0 10px;
  color: var(--accent2);
  font-size: 13px;
  line-height: 1.2;
  text-transform: uppercase;
}

.detail-section p,
.data-row p,
.plain-list {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.58;
}

.detail-section p {
  margin-bottom: 0;
}

.media-section {
  display: grid;
  gap: 12px;
}

.media-item {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.media-item img,
.media-item video {
  display: block;
  width: 100%;
  max-height: 240px;
  object-fit: cover;
  background: var(--panel);
}

.media-item audio {
  display: block;
  width: calc(100% - 20px);
  margin: 10px;
}

.media-link {
  display: grid;
  min-height: 120px;
  place-items: center;
  color: var(--accent4);
}

.media-item figcaption {
  display: grid;
  gap: 4px;
  padding: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.media-item figcaption strong {
  color: var(--text);
}

.meta-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
}

.meta-list div {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 10px;
}

.meta-list dt {
  color: var(--muted);
  font-size: 12px;
}

.meta-list dd {
  margin: 0;
  color: var(--text);
  font-size: 13px;
  line-height: 1.45;
}

.stack-list {
  display: grid;
  gap: 9px;
}

.data-row {
  padding: 10px;
  border: 1px solid color-mix(in srgb, var(--line) 82%, transparent);
  border-radius: 8px;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
}

.data-row strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-size: 13px;
  line-height: 1.35;
}

.data-row small {
  display: block;
  color: var(--muted);
  font-family: var(--mono-font);
  font-size: 11px;
  line-height: 1.4;
}

.data-row p {
  margin: 8px 0 0;
}

.plain-list {
  margin: 0;
  padding-inline-start: 20px;
}

.link-button {
  display: inline;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--accent4);
  text-align: start;
  text-decoration: underline;
}

.json-block {
  max-height: 260px;
  overflow: auto;
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
  direction: ltr;
  font-family: var(--mono-font);
  font-size: 11px;
  line-height: 1.5;
  text-align: left;
}

.empty-state,
.fatal {
  display: grid;
  min-height: 240px;
  place-items: center;
  padding: 28px;
  color: var(--muted);
  text-align: center;
}

.fatal {
  min-height: 100vh;
  background: var(--background);
}

@media (max-width: 1280px) {
  .workspace {
    grid-template-columns: 292px minmax(0, 1fr) 336px;
  }

  .timeline-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .timeline-actions {
    justify-content: flex-start;
  }

  .platform-grid,
  .about-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  html,
  body {
    overflow: auto;
  }

  .app-shell {
    min-height: 100vh;
    height: auto;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-controls {
    justify-content: flex-start;
    width: 100%;
  }

  .primary-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
  }

  .primary-nav a {
    white-space: nowrap;
  }

  .platform-hero {
    min-height: auto;
    padding-block: 54px 78px;
  }

  .landing-hero::before {
    background:
      linear-gradient(180deg, color-mix(in srgb, var(--background) 76%, transparent), var(--background) 86%),
      linear-gradient(90deg, var(--background), color-mix(in srgb, var(--background) 64%, transparent)),
      url("../assets/histui-hero.png") 58% center / cover no-repeat;
  }

  .hero-metrics {
    position: static;
    justify-content: flex-start;
    margin-top: 34px;
  }

  .split-copy,
  .narrative-band,
  .builder-shell {
    grid-template-columns: 1fr;
  }

  .workspace {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: minmax(70vh, 1fr) auto;
    min-height: calc(100vh - 146px);
  }

  .control-panel {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    z-index: 40;
    width: min(340px, calc(100vw - 38px));
    border-inline-end: 1px solid var(--line);
    box-shadow: 22px 0 44px var(--shadow);
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  [dir="rtl"] .control-panel {
    transform: translateX(105%);
  }

  .control-panel.is-open {
    transform: translateX(0);
  }

  .filters-button {
    display: grid;
  }

  .timeline-workbench {
    min-height: 70vh;
  }

  .timeline-stage {
    min-height: 520px;
  }

  .inspector {
    max-height: none;
    border-block-start: 1px solid var(--line);
    border-inline-start: 0;
  }
}

@media (max-width: 620px) {
  .topbar {
    padding: 12px;
  }

  .brand-block {
    width: 100%;
  }

  .brand-link {
    width: auto;
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: 46px;
  }

  .hero-actions,
  .builder-actions {
    display: grid;
  }

  .primary-action,
  .secondary-action,
  .nav-cta {
    width: 100%;
  }

  .platform-grid,
  .about-layout,
  .builder-form-grid {
    grid-template-columns: 1fr;
  }

  .platform-card {
    min-height: 0;
  }

  .builder-form-grid .wide {
    grid-column: auto;
  }

  .select-field {
    width: 100%;
  }

  .topbar-controls .select-field {
    width: calc(50% - 5px);
  }

  .topbar-controls .select-field:first-child,
  .topbar-controls .segmented {
    width: 100%;
  }

  .select-field.compact,
  .select-field.micro {
    width: calc(50% - 6px);
  }

  .timeline-head {
    padding: 12px;
  }

  .timeline-actions {
    width: 100%;
  }

  .viewport-chip,
  .toggle-pill {
    width: 100%;
    justify-content: center;
  }

  .timeline-title h2 {
    white-space: normal;
  }

  .event-card {
    width: min(248px, calc(100vw - 36px));
  }

  .event-card.mode-icon {
    width: min(168px, calc(100vw - 36px));
  }

  .event-card.mode-short {
    width: min(206px, calc(100vw - 36px));
  }

  .stage-hint {
    inset-inline: 10px;
  }

}

.event-card.is-exploded {
  width: var(--card-width);
  max-width: var(--card-width);
  max-height: var(--card-max-height);
}

@media (max-width: 980px) {
  body.is-broadcast-mode {
    overflow: hidden;
  }

  .app-shell.is-broadcast-mode {
    height: 100vh;
    min-height: 100vh;
  }

  .app-shell.is-broadcast-mode .viewer-workspace {
    min-height: 100vh;
  }

  .app-shell.is-broadcast-mode .timeline-workbench {
    min-height: 0;
  }

  .app-shell.is-broadcast-mode .package-timeline-mount .timeline-stage {
    min-height: 0;
  }

  .app-shell.is-broadcast-mode.broadcast-show-inspector .inspector {
    inset-block: auto 14px;
    inset-inline: 14px;
    width: auto;
    max-height: 38vh;
  }
}

@media (max-width: 620px) {
  .app-shell.is-broadcast-mode .broadcast-dock {
    inset-block-start: 8px;
    inset-inline: 8px;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .broadcast-panel {
    inset-block-start: 62px;
    inset-inline: 8px;
    width: auto;
    max-height: calc(100vh - 76px);
  }

  .broadcast-panel-actions .text-button {
    width: 100%;
  }
}