:root {
  color-scheme: dark;
  --bg: #06100d;
  --bg-elevated: rgba(11, 28, 22, 0.86);
  --bg-elevated-solid: #0b1c16;
  --panel: rgba(15, 38, 30, 0.82);
  --panel-strong: rgba(18, 54, 42, 0.94);
  --line: rgba(158, 221, 174, 0.26);
  --line-strong: rgba(215, 184, 105, 0.42);
  --text: #f4ecd4;
  --muted: #b7c9b9;
  --muted-2: #829989;
  --green: #8fe6a3;
  --green-strong: #44d477;
  --gold: #d7b869;
  --red: #ff897d;
  --shadow: rgba(0, 0, 0, 0.55);
  --topbar-h: 76px;
  --radius: 18px;
  --radius-sm: 10px;
  --focus: 0 0 0 3px rgba(143, 230, 163, 0.34);
  --font-ui: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(67, 212, 119, 0.14), transparent 32rem),
    radial-gradient(circle at bottom right, rgba(215, 184, 105, 0.12), transparent 28rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
}
button, select, input { font: inherit; }
button, label, select { -webkit-tap-highlight-color: transparent; }
button:focus-visible, select:focus-visible, label:focus-within { outline: none; box-shadow: var(--focus); }

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  transform: translateY(-150%);
  z-index: 1000;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--green);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated-solid);
  color: var(--text);
}
.skip-link:focus { transform: translateY(0); }

.app-topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  min-height: var(--topbar-h);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: center;
  padding: max(0.75rem, env(safe-area-inset-top)) 1rem 0.75rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(5, 16, 12, 0.96), rgba(8, 26, 20, 0.88));
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 40px var(--shadow);
}

.brand-block { display: inline-flex; align-items: center; gap: 0.75rem; min-width: 9rem; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 35% 65% 43% 57% / 52% 34% 66% 48%;
  border: 1px solid var(--line-strong);
  background: radial-gradient(circle at 32% 20%, rgba(215, 184, 105, 0.42), transparent 45%), rgba(21, 70, 48, 0.76);
  color: var(--gold);
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: -0.08em;
}
.brand-copy { display: grid; line-height: 1.02; }
.brand-copy strong { font-size: 1.2rem; letter-spacing: 0.04em; }
.brand-copy span { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.12em; }

.control-strip {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.control-button, .compact-field, .toggle-field {
  min-height: 2.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(13, 38, 28, 0.78);
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.control-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 0.75rem;
  cursor: pointer;
  font-weight: 750;
}
.control-button:hover:not(:disabled), .file-button:hover { border-color: var(--gold); background: rgba(29, 70, 49, 0.88); }
.control-button:disabled { opacity: 0.48; cursor: not-allowed; }
.control-button.ghost { background: rgba(255,255,255,0.035); color: var(--muted); }
.control-button.large { min-height: 3rem; padding-inline: 1.1rem; }
.file-button { cursor: pointer; }
.file-button input { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; pointer-events: none; }

.compact-field {
  display: inline-grid;
  grid-template-columns: auto minmax(8rem, 13rem);
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.35rem 0.25rem 0.65rem;
}
.compact-field span, .toggle-field span { color: var(--muted); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 800; }
.compact-field select {
  min-width: 0;
  border: 0;
  border-radius: 0.5rem;
  padding: 0.35rem 0.45rem;
  background: rgba(0,0,0,0.24);
  color: var(--text);
}
.toggle-field {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.65rem;
}
.toggle-field input { accent-color: var(--green-strong); }

.app-shell {
  height: 100vh;
  height: 100dvh;
  padding-top: var(--topbar-h);
  display: grid;
  grid-template-rows: 1fr auto;
}
.video-stage {
  position: relative;
  min-height: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(143,230,163,0.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(143,230,163,0.05) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,0.02), transparent 58%),
    #020604;
  background-size: 44px 44px, 44px 44px, auto, auto;
}
#sourceVideo { display: none; }
#videoCanvas {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  background: #000;
  box-shadow: 0 0 0 1px rgba(143,230,163,0.18), 0 30px 80px rgba(0,0,0,0.68);
}
#videoCanvas.is-empty { display: none; }

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  pointer-events: none;
}
.empty-state.is-hidden { display: none; }
.empty-card {
  width: min(42rem, 100%);
  padding: clamp(1.2rem, 2.6vw, 2.1rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(11, 28, 22, 0.93), rgba(7, 17, 14, 0.86));
  backdrop-filter: blur(18px);
  box-shadow: 0 30px 80px var(--shadow);
  pointer-events: auto;
}
.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  font-weight: 850;
}
.empty-card h1 { margin: 0 0 0.8rem; font-size: clamp(1.8rem, 5vw, 3.3rem); line-height: 0.98; letter-spacing: -0.05em; }
.empty-card p { color: var(--muted); line-height: 1.5; }
.empty-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 1.1rem; }
.hint-text { font-size: 0.9rem; color: var(--muted-2) !important; }

.status-hud {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  pointer-events: none;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 1.85rem;
  padding: 0.32rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(6, 16, 13, 0.76);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  backdrop-filter: blur(10px);
}
.chip.ok { border-color: rgba(143,230,163,0.42); color: var(--green); }
.chip.warning { border-color: rgba(215,184,105,0.44); color: var(--gold); }
.chip.error { border-color: rgba(255,137,125,0.46); color: var(--red); }

.performance-hud {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  gap: 0.45rem;
  min-width: min(22rem, calc(100% - 2rem));
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(6, 16, 13, 0.76);
  backdrop-filter: blur(12px);
  box-shadow: 0 20px 50px var(--shadow);
}
.performance-hud div { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.performance-hud span { color: var(--muted-2); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 850; }
.performance-hud strong { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text); text-align: right; }

.bottom-panel {
  min-height: 3.8rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  padding: 0.7rem 1rem max(0.7rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: rgba(4, 12, 9, 0.92);
  color: var(--muted);
  font-size: 0.88rem;
}
.bottom-panel strong { color: var(--green); }

.mobile-controls-toggle, .drawer-backdrop { display: none; }

.diagnostics-dialog {
  width: min(58rem, calc(100vw - 2rem));
  max-height: min(46rem, calc(100dvh - 2rem));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0;
  background: var(--bg-elevated-solid);
  color: var(--text);
  box-shadow: 0 30px 90px rgba(0,0,0,0.75);
}
.diagnostics-dialog::backdrop { background: rgba(0, 0, 0, 0.72); backdrop-filter: blur(4px); }
.dialog-shell { display: grid; grid-template-rows: auto 1fr; min-height: 0; }
.dialog-shell header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}
.dialog-shell h2 { margin: 0; }
#diagnosticsOutput {
  margin: 0;
  padding: 1rem;
  max-height: 60vh;
  overflow: auto;
  color: #dcebd8;
  background: rgba(0,0,0,0.28);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.45;
  white-space: pre-wrap;
}
.noscript-warning { position: fixed; inset: auto 1rem 1rem; z-index: 200; padding: 1rem; background: #3b1512; color: #fff; border: 1px solid var(--red); border-radius: var(--radius-sm); }

@media (max-width: 980px) {
  :root { --topbar-h: 72px; }
  .app-topbar { grid-template-columns: 1fr; align-items: stretch; gap: 0.65rem; }
  .brand-block { min-width: 0; }
  .control-strip { justify-content: flex-start; }
  .compact-field { grid-template-columns: auto minmax(9rem, 1fr); }
}

@media (max-width: 760px) {
  body { overflow: hidden; }
  :root { --topbar-h: 0px; }
  .mobile-controls-toggle {
    display: inline-flex;
    position: fixed;
    top: max(0.75rem, env(safe-area-inset-top));
    right: 0.75rem;
    z-index: 80;
    min-height: 2.65rem;
    align-items: center;
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    background: rgba(7, 23, 17, 0.88);
    color: var(--text);
    font-weight: 850;
    box-shadow: 0 12px 36px var(--shadow);
    backdrop-filter: blur(12px);
  }
  .drawer-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 54;
    background: rgba(0,0,0,0.56);
    backdrop-filter: blur(3px);
  }
  .app-topbar {
    top: 0;
    bottom: auto;
    z-index: 70;
    width: min(25rem, calc(100vw - 1rem));
    max-height: calc(100dvh - 1rem);
    overflow: auto;
    margin: 0.5rem;
    padding: calc(0.8rem + env(safe-area-inset-top)) 0.8rem 0.8rem;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    transform: translateY(calc(-100% - 1rem));
    transition: transform 170ms ease;
  }
  .app-topbar.is-open { transform: translateY(0); }
  .control-strip { display: grid; grid-template-columns: 1fr; }
  .control-button, .compact-field, .toggle-field { width: 100%; min-height: 2.85rem; }
  .compact-field { grid-template-columns: 5.2rem 1fr; }
  .app-shell { padding-top: 0; }
  .status-hud { top: 0.75rem; right: 7rem; }
  .performance-hud { left: 0.75rem; right: 0.75rem; bottom: 0.75rem; min-width: 0; }
  .bottom-panel { display: none; }
  .empty-card h1 { font-size: clamp(1.65rem, 11vw, 2.45rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

/* Sprint 2: preset/timeline/mask/effect workbench */
.wide-field { grid-template-columns: auto minmax(13rem, 20rem); }
.workspace-panel {
  max-height: 38vh;
  min-height: 14.5rem;
  display: grid;
  grid-template-columns: minmax(18rem, 0.9fr) minmax(34rem, 2.2fr);
  grid-template-rows: auto 1fr;
  gap: 0.75rem;
  padding: 0.75rem 1rem max(0.75rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: rgba(4, 12, 9, 0.94);
  box-shadow: 0 -18px 50px rgba(0,0,0,0.42);
  overflow: auto;
}
.workspace-panel.is-collapsed { display: none; }
.preset-detail-card {
  grid-row: span 2;
  display: grid;
  align-content: start;
  gap: 0.35rem;
  min-width: 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(145deg, rgba(13, 38, 28, 0.9), rgba(6, 18, 14, 0.86));
}
.preset-detail-card strong { color: var(--green); font-size: 1.02rem; }
.preset-detail-card span { color: var(--gold); font-size: 0.78rem; font-weight: 850; text-transform: uppercase; letter-spacing: 0.08em; }
.preset-detail-card em { color: var(--muted); font-style: normal; line-height: 1.45; }
.timeline-panel, .inspector-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(9, 27, 21, 0.76);
  min-width: 0;
}
.timeline-panel { padding: 0.7rem; }
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}
.panel-heading h2 { margin: 0; font-size: 1rem; letter-spacing: -0.02em; }
.compact-heading { padding: 0.65rem 0.65rem 0; margin-bottom: 0.4rem; }
.panel-actions, .add-row { display: flex; align-items: center; gap: 0.45rem; flex-wrap: wrap; }
.add-row { padding: 0 0.65rem 0.5rem; }
.add-row select {
  min-width: 0;
  flex: 1 1 12rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.25);
  color: var(--text);
  padding: 0.55rem;
}
.timeline-track {
  position: relative;
  height: 3.2rem;
  overflow: hidden;
  border: 1px solid rgba(143,230,163,0.22);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(90deg, rgba(143,230,163,0.12) 1px, transparent 1px),
    linear-gradient(180deg, rgba(215,184,105,0.08), rgba(0,0,0,0.16));
  background-size: 10% 100%, auto;
}
.timeline-playhead {
  position: absolute;
  z-index: 4;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gold);
  box-shadow: 0 0 16px rgba(215,184,105,0.65);
}
.timeline-region {
  position: absolute;
  top: 0.55rem;
  bottom: 0.55rem;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  border: 1px solid rgba(143,230,163,0.48);
  border-radius: 0.55rem;
  background: rgba(68, 212, 119, 0.2);
  color: var(--text);
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}
.timeline-region.is-selected { border-color: var(--gold); background: rgba(215,184,105,0.24); }
.timeline-region.is-disabled { opacity: 0.45; }
.region-list {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.55rem;
  max-height: 7.5rem;
  overflow: auto;
}
.compact-list { max-height: 5.25rem; padding: 0 0.65rem; }
.region-row {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.45rem 0.55rem;
  border: 1px solid rgba(143,230,163,0.18);
  border-radius: 0.65rem;
  background: rgba(0,0,0,0.18);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}
.region-row strong { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.region-row span { color: var(--muted-2); font-size: 0.78rem; white-space: nowrap; }
.region-row.is-selected { border-color: var(--gold); background: rgba(215,184,105,0.11); }
.inspector-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(16rem, 1fr));
  gap: 0.75rem;
  min-width: 0;
}
.inspector-card { min-height: 12rem; overflow: auto; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
  padding: 0 0.65rem 0.65rem;
}
.one-column { grid-template-columns: 1fr; }
.mini-field {
  display: grid;
  gap: 0.25rem;
  min-width: 0;
}
.mini-field span, .mini-readout span {
  color: var(--muted-2);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 850;
}
.mini-field input, .mini-field select {
  width: 100%;
  min-height: 2rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(0,0,0,0.24);
  color: var(--text);
  padding: 0.35rem 0.45rem;
}
.mini-field input[type="range"] { padding: 0; accent-color: var(--green-strong); }
.mini-toggle { min-height: 2rem; padding: 0.35rem 0.55rem; }
.mini-readout {
  display: grid;
  gap: 0.25rem;
  align-content: center;
  padding: 0.35rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(0,0,0,0.16);
}
.mini-readout strong { font-family: var(--font-mono); font-size: 0.78rem; }
.subtle { color: var(--muted-2); font-size: 0.86rem; margin: 0.35rem 0.65rem 0.65rem; line-height: 1.35; }
.effect-param-panel { display: grid; gap: 0.45rem; }

@media (max-width: 1260px) {
  .workspace-panel { grid-template-columns: 1fr; max-height: 45vh; }
  .preset-detail-card { grid-row: auto; }
  .inspector-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .workspace-panel {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 42;
    max-height: 50dvh;
    min-height: 14rem;
    display: block;
    padding: 0.65rem;
    overflow: auto;
  }
  .workspace-panel.is-collapsed { display: none; }
  .timeline-panel, .inspector-card, .preset-detail-card { margin-bottom: 0.65rem; }
  .form-grid { grid-template-columns: 1fr; }
  .panel-heading { align-items: flex-start; flex-direction: column; }
  .panel-actions { width: 100%; }
  .panel-actions .control-button { flex: 1 1 auto; }
  .status-hud { right: 7rem; }
}

/* Sprint 3: MIDI Learn, project state, and diagnostics additions */
.mapping-card { min-height: 12rem; }
.wide-mini { grid-column: 1 / -1; }
.learn-active {
  color: var(--gold) !important;
  border: 1px solid rgba(215,184,105,0.32);
  border-radius: 0.6rem;
  padding: 0.45rem;
  background: rgba(215,184,105,0.08);
}
#mappingList .region-row span { max-width: 55%; overflow: hidden; text-overflow: ellipsis; }
#mappingEditorSummary { min-height: 2.2rem; }
#loadProjectInput { position: absolute; inline-size: 1px; block-size: 1px; opacity: 0; pointer-events: none; }

@media (min-width: 1261px) {
  .inspector-grid { grid-template-columns: repeat(4, minmax(15rem, 1fr)); }
}

/* Sprint 4A: plug-and-play UX correction */
.grouped-topbar {
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  min-height: 84px;
}
.grouped-control-strip {
  justify-content: flex-start;
  align-items: stretch;
  gap: 0.55rem;
}
.control-group {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
  padding: 0.35rem;
  border: 1px solid rgba(143,230,163,0.16);
  border-radius: 14px;
  background: rgba(3, 13, 9, 0.36);
}
.group-label {
  color: var(--gold);
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-weight: 900;
  padding-inline: 0.2rem;
}
.brand-nav-group { padding-right: 0.25rem; }
.nav-button { min-height: 2rem; padding: 0.4rem 0.55rem; text-decoration: none; font-size: 0.78rem; }
.control-button, .dock-button, .file-button { transition: transform 120ms ease, border-color 120ms ease, background 120ms ease, box-shadow 120ms ease; }
.control-button:active:not(:disabled), .dock-button:active:not(:disabled), .file-button:active { transform: translateY(1px) scale(0.985); }
.is-clicked { animation: uvj-click-feedback 180ms ease-out; }
.is-success-pulse { animation: uvj-success-pulse 780ms ease-out; }
@keyframes uvj-click-feedback {
  0% { box-shadow: 0 0 0 0 rgba(143,230,163,0.0); }
  45% { box-shadow: 0 0 0 4px rgba(143,230,163,0.18); }
  100% { box-shadow: 0 0 0 0 rgba(143,230,163,0.0); }
}
@keyframes uvj-success-pulse {
  0% { border-color: var(--green); background: rgba(68,212,119,0.26); }
  100% { border-color: var(--line); }
}

/* Strong form contrast, including native dropdown fallback. */
select, input, option {
  background-color: #06130e;
  color: var(--text);
}
option { color: #f8f0d8; background-color: #071b13; }
option:checked, option:hover { color: #07130f; background-color: #9fe8ae; }
.compact-field select, .mini-field select, .add-row select, .mini-field input {
  background: #06130e;
  color: #f8f0d8;
  border: 1px solid rgba(143,230,163,0.32);
}
.compact-field select:disabled, .mini-field select:disabled, .mini-field input:disabled {
  color: rgba(244,236,212,0.62);
  background: #0a1712;
  border-color: rgba(143,230,163,0.16);
}
.compact-field select:focus, .mini-field select:focus, .mini-field input:focus { outline: none; box-shadow: var(--focus); border-color: var(--gold); }

.sprint4a-workspace {
  max-height: 42vh;
  min-height: 12.8rem;
  grid-template-columns: 1fr;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 0.55rem;
  overflow: hidden;
}
.sprint4a-workspace.is-collapsed { display: grid; }
.always-visible-timeline { padding: 0.55rem; }
.timeline-heading { margin-bottom: 0.35rem; }
.compact-timeline-actions .control-button { min-height: 2rem; padding: 0.35rem 0.55rem; }
.compact-region-list {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  overflow-y: hidden;
  max-height: 2.7rem;
  padding-bottom: 0.15rem;
}
.compact-region-list .region-row {
  flex: 0 0 auto;
  width: auto;
  min-width: 12rem;
}
.bottom-dock {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.45rem;
}
.dock-button {
  min-height: 2.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(11, 28, 22, 0.82);
  color: var(--text);
  font-weight: 900;
  cursor: pointer;
}
.dock-button:hover { border-color: var(--gold); background: rgba(29, 70, 49, 0.88); }
.dock-button.is-active {
  border-color: var(--gold);
  color: #fff7df;
  background: linear-gradient(180deg, rgba(51,94,62,0.94), rgba(20,55,39,0.94));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), 0 0 22px rgba(215,184,105,0.12);
}
.detail-panel-deck {
  min-height: 0;
  overflow: auto;
}
.detail-panel[hidden] { display: none !important; }
.detail-panel.is-active { display: block; }
.detail-panel { min-height: 8rem; }
.panel-help { margin-top: -0.2rem; }
.region-form-grid { grid-template-columns: repeat(5, minmax(8rem, 1fr)); }
.timeline-track { cursor: crosshair; touch-action: none; }
.timeline-region {
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  cursor: grab;
  padding-inline: 0.7rem;
}
.timeline-region:active { cursor: grabbing; }
.timeline-region span { overflow: hidden; text-overflow: ellipsis; pointer-events: none; }
.resize-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 0.48rem;
  background: rgba(215,184,105,0.25);
  cursor: ew-resize;
}
.resize-handle.left { left: 0; border-radius: 0.55rem 0 0 0.55rem; }
.resize-handle.right { right: 0; border-radius: 0 0.55rem 0.55rem 0; }
.timeline-drag-ghost {
  position: absolute;
  z-index: 3;
  top: 0.55rem;
  bottom: 0.55rem;
  border: 1px dashed var(--gold);
  border-radius: 0.55rem;
  background: rgba(215,184,105,0.12);
  pointer-events: none;
}

.app-dialog {
  width: min(42rem, calc(100vw - 2rem));
  max-height: min(42rem, calc(100dvh - 2rem));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0;
  background: var(--bg-elevated-solid);
  color: var(--text);
  box-shadow: 0 30px 90px rgba(0,0,0,0.75);
}
.app-dialog::backdrop { background: rgba(0,0,0,0.72); backdrop-filter: blur(5px); }
.compact-dialog-shell { min-height: 0; }
.dialog-body { padding: 1rem; display: grid; gap: 0.8rem; }
.dialog-body p, .dialog-body li { color: var(--muted); line-height: 1.45; }
.dialog-body strong, .quickstart-body strong { color: var(--text); }
.quickstart-body ol { margin: 0; padding-left: 1.35rem; display: grid; gap: 0.55rem; }
.dialog-actions { display: flex; flex-wrap: wrap; gap: 0.55rem; align-items: center; }
.dialog-actions .control-button { min-height: 2.55rem; }

.sequencer-card { min-height: 12rem; }
.sequencer-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 0.55rem; padding: 0 0.65rem 0.65rem; }
.bpm-field { max-width: 8rem; }
.sequencer-steps {
  display: grid;
  grid-template-columns: repeat(8, minmax(4.6rem, 1fr));
  gap: 0.45rem;
  padding: 0 0.65rem 0.65rem;
}
.sequencer-step {
  min-height: 4.1rem;
  display: grid;
  gap: 0.15rem;
  align-content: center;
  border: 1px solid rgba(143,230,163,0.24);
  border-radius: 0.85rem;
  background: rgba(0,0,0,0.2);
  color: var(--text);
  cursor: pointer;
}
.sequencer-step strong { color: var(--gold); font-size: 0.78rem; }
.sequencer-step span { font-weight: 950; font-size: 1.05rem; }
.sequencer-step em { color: var(--muted-2); font-size: 0.72rem; font-style: normal; }
.sequencer-step.is-selected { border-color: var(--gold); background: rgba(215,184,105,0.13); }
.sequencer-step.is-current { box-shadow: 0 0 0 2px rgba(143,230,163,0.34), 0 0 24px rgba(143,230,163,0.14); }
.sequencer-step.is-muted { opacity: 0.48; }
.sequencer-editor { display: grid; gap: 0.55rem; padding: 0 0.65rem 0.75rem; }
.sequencer-keyboard { display: grid; grid-template-columns: repeat(12, minmax(2.7rem, 1fr)); gap: 0.35rem; }
.sequencer-key {
  min-height: 2.55rem;
  border: 1px solid rgba(143,230,163,0.24);
  border-radius: 0.55rem;
  background: #10251c;
  color: var(--text);
  font-weight: 900;
  cursor: pointer;
}
.sequencer-key.sharp { background: #07100c; color: var(--gold); }
.velocity-field { max-width: 26rem; }

@media (max-width: 1260px) {
  .region-form-grid { grid-template-columns: repeat(2, minmax(8rem, 1fr)); }
  .sequencer-steps { grid-template-columns: repeat(4, minmax(4.6rem, 1fr)); }
}

@media (max-width: 760px) {
  .grouped-topbar {
    grid-template-columns: 1fr;
    width: min(26rem, calc(100vw - 1rem));
  }
  .grouped-control-strip, .control-group { display: grid; grid-template-columns: 1fr; width: 100%; }
  .brand-nav-group { display: grid; grid-template-columns: auto 1fr; align-items: center; }
  .brand-nav-group .nav-button { grid-column: 1 / -1; width: 100%; }
  .sprint4a-workspace {
    position: fixed;
    inset: auto 0 0 0;
    z-index: 42;
    max-height: 54dvh;
    min-height: 13rem;
    padding: 0.55rem;
    display: grid;
    overflow: hidden;
  }
  .bottom-dock { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0.25rem; }
  .dock-button { min-height: 2.5rem; padding: 0.35rem 0.2rem; font-size: 0.72rem; }
  .detail-panel-deck { overflow: auto; }
  .region-form-grid, .form-grid { grid-template-columns: 1fr; }
  .sequencer-steps { grid-template-columns: repeat(4, minmax(3.7rem, 1fr)); padding-inline: 0; }
  .sequencer-keyboard { grid-template-columns: repeat(6, minmax(2.7rem, 1fr)); }
  .sequencer-controls { padding-inline: 0; }
  .compact-region-list { display: none; }
  .timeline-heading { align-items: stretch; }
  .compact-timeline-actions { display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; }
  .compact-timeline-actions .control-button { min-width: 0; padding-inline: 0.25rem; }
}

/* Sprint 4B: interaction correction, mobile-first polish, and fitting rules */
:root { --workspace-panel-height: 220px; }
.app-topbar { min-height: auto; }
.app-shell { grid-template-rows: minmax(0, 1fr) auto; }
.video-stage { padding: 1.1rem; }
#videoCanvas {
  display: block;
  max-width: calc(100vw - 2.2rem);
  max-height: calc(100dvh - var(--topbar-h) - var(--workspace-panel-height) - 2.2rem);
  object-fit: contain;
}
#videoStage:fullscreen {
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
}
#videoStage:fullscreen #videoCanvas {
  max-width: 100%;
  max-height: 100%;
}
.performance-hud { max-width: min(30rem, calc(100% - 2rem)); }
.performance-hud div { display: grid; grid-template-columns: 5.2rem minmax(0, 1fr); }
.performance-hud strong { overflow-wrap: anywhere; }

.controller-field { grid-template-columns: auto minmax(10rem, 14rem); }
.grouped-control-strip { align-items: center; }
.control-group { flex: 0 1 auto; }
.control-button, .dock-button { user-select: none; }
.control-button.is-active, .dock-button.is-active, .region-command.is-active {
  border-color: var(--gold);
  color: #fff7df;
  background: linear-gradient(180deg, rgba(54, 99, 66, 0.92), rgba(20, 55, 39, 0.96));
  box-shadow: 0 0 0 1px rgba(215,184,105,0.16), 0 0 18px rgba(215,184,105,0.12);
}
.danger-command:not(:disabled) { border-color: rgba(255,137,125,0.42); color: #ffd9d4; }
.legacy-region-tool { opacity: 0.78; }

.sprint4a-workspace {
  height: var(--workspace-panel-height);
  min-height: 9rem;
  max-height: 46dvh;
  resize: none;
  overflow: hidden;
}
.detail-panel-deck:empty, .detail-panel-deck:not(:has(.detail-panel.is-active)) {
  min-height: 0;
}
.panel-resize-handle {
  height: 0.55rem;
  margin: -0.15rem 0 0;
  border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(143,230,163,0.26), transparent);
  cursor: ns-resize;
  touch-action: none;
}
.panel-resize-handle::before {
  content: "";
  display: block;
  width: 5rem;
  max-width: 42%;
  height: 0.18rem;
  margin: 0.18rem auto 0;
  border-radius: 999px;
  background: rgba(244,236,212,0.36);
}

.bottom-dock { align-items: stretch; }
.dock-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 0.85rem;
  background: rgba(2, 10, 8, 0.72);
  border-color: rgba(143,230,163,0.18);
  color: #eaf5df;
  letter-spacing: 0.01em;
}
.dock-button span { display: inline-block; overflow: hidden; text-overflow: ellipsis; }
.select-region-dock { border-style: dashed; }
.select-region-dock.is-active, .timeline-track.is-select-region-mode {
  border-color: var(--gold);
  box-shadow: inset 0 0 0 1px rgba(215,184,105,0.18), 0 0 18px rgba(215,184,105,0.08);
}
.timeline-track.is-select-region-mode::after {
  content: "Drag here to create the active region";
  position: absolute;
  inset: auto 0.6rem 0.2rem auto;
  color: rgba(244,236,212,0.58);
  font-size: 0.7rem;
  pointer-events: none;
}
.timeline-region {
  min-width: 2rem;
  border-width: 2px;
  background: linear-gradient(180deg, rgba(68,212,119,0.26), rgba(68,212,119,0.12));
}
.timeline-region.is-selected {
  background: linear-gradient(180deg, rgba(215,184,105,0.34), rgba(92,74,32,0.38));
}
.resize-handle { width: max(0.72rem, 24px); background: rgba(215,184,105,0.3); }
.resize-handle.left::after, .resize-handle.right::after {
  content: "";
  position: absolute;
  top: 24%; bottom: 24%; left: 50%;
  width: 2px; transform: translateX(-50%);
  border-radius: 99px;
  background: rgba(244,236,212,0.5);
}
.timeline-drag-ghost { background: rgba(215,184,105,0.22); border-width: 2px; }
.compact-region-list .subtle { margin: 0.2rem 0; }

.sequencer-step { position: relative; overflow: hidden; text-align: center; }
.sequencer-step .velocity-meter {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: var(--vel, 60%);
  max-height: 100%;
  background: linear-gradient(0deg, rgba(143,230,163,0.22), transparent);
  pointer-events: none;
}
.sequencer-step > *:not(.velocity-meter) { position: relative; z-index: 1; }
.sequencer-step.is-current { animation: seq-step-pulse 220ms ease-out; }
@keyframes seq-step-pulse { 0% { transform: translateY(0) scale(1); } 50% { transform: translateY(-1px) scale(1.025); } 100% { transform: translateY(0) scale(1); } }

#downloadConfirmDialog strong, #saveConfirmDialog strong { color: var(--green); }

@media (min-width: 761px) {
  .detail-panel-deck:not(:has(.detail-panel.is-active)) { display: none; }
  .panel-resize-handle:has(+ .detail-panel-deck .detail-panel.is-active) { display: block; }
}

@media (max-width: 760px) {
  :root { --workspace-panel-height: 45dvh; }
  .video-stage { padding: 4.2rem 0.5rem 0.5rem; }
  #videoCanvas {
    max-width: calc(100vw - 1rem);
    max-height: calc(100dvh - var(--workspace-panel-height) - 5rem);
  }
  .status-hud {
    top: calc(3.65rem + env(safe-area-inset-top));
    left: 0.55rem;
    right: 0.55rem;
    max-height: 5.2rem;
    overflow: auto;
  }
  .performance-hud {
    left: 0.55rem;
    right: 0.55rem;
    bottom: calc(var(--workspace-panel-height) + 0.75rem);
    min-width: 0;
    font-size: 0.82rem;
    padding: 0.55rem;
  }
  .performance-hud div { grid-template-columns: 4.9rem minmax(0, 1fr); }
  .sprint4a-workspace {
    height: var(--workspace-panel-height);
    max-height: 58dvh;
    min-height: 10.5rem;
    border-radius: 18px 18px 0 0;
    box-shadow: 0 -20px 60px rgba(0,0,0,0.62);
  }
  .panel-resize-handle { display: block; height: 0.85rem; }
  .timeline-track { height: 3.8rem; }
  .bottom-dock { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .dock-button { min-height: 2.8rem; font-size: 0.7rem; gap: 0.1rem; flex-direction: column; }
  .dock-button span { max-width: 100%; }
  .resize-handle { width: 44px; }
  .sequencer-step { min-height: 4.8rem; }
  .sequencer-key { min-height: 3rem; }
  .control-button, .compact-field, .toggle-field { min-height: 3rem; }
  .controller-field { grid-template-columns: 5.2rem 1fr; }
  .legacy-region-tool { display: none; }
}


/* === Sprint 4C control architecture overrides === */
:root { --topbar-h: 58px; --workspace-h: 158px; }
.sprint4c-topbar {
  min-height: var(--topbar-h);
  display: block;
  padding: max(0.45rem, env(safe-area-inset-top)) 0.7rem 0.45rem;
  overflow: visible;
}
.thin-nav-row { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; min-height: 46px; }
.sprint4c-topbar .brand-block { min-width: auto; gap: 0.55rem; }
.sprint4c-topbar .brand-mark { width: 2.25rem; height: 2.25rem; font-size: 1.15rem; }
.sprint4c-topbar .brand-copy strong { font-size: 1.02rem; }
.sprint4c-topbar .brand-copy span { font-size: 0.66rem; }
.top-group-buttons { display: flex; align-items: center; justify-content: flex-end; gap: 0.45rem; flex: 1; min-width: 0; }
.top-group-toggle {
  display: grid;
  grid-template-columns: auto;
  gap: 0.1rem;
  min-height: 2.35rem;
  max-width: 16rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text);
  background: rgba(10, 33, 25, 0.78);
  cursor: pointer;
  text-align: left;
}
.top-group-toggle > span { color: var(--gold); text-transform: uppercase; letter-spacing: 0.13em; font-size: 0.68rem; font-weight: 900; }
.top-group-toggle > small { display: block; max-width: 13.5rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); font-size: 0.72rem; }
.top-group-toggle:hover, .top-group-toggle.is-active { border-color: var(--gold); background: rgba(27, 73, 51, 0.92); }
.top-control-popover {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0.7rem;
  z-index: 80;
  width: min(60rem, calc(100vw - 1.4rem));
  padding: 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(6, 18, 14, 0.98), rgba(12, 42, 30, 0.96));
  box-shadow: 0 28px 80px rgba(0,0,0,0.72);
}
.top-control-popover .control-group { display: flex; align-items: center; flex-wrap: wrap; gap: 0.55rem; padding: 0; border: 0; background: transparent; }
.top-control-popover[hidden] { display: none !important; }

.app-shell { height: 100dvh; padding-top: var(--topbar-h); display: block; }
.video-stage { position: fixed; top: var(--topbar-h); left: 0; right: 0; bottom: var(--workspace-h); min-height: 12rem; }
#videoCanvas { max-width: calc(100vw - 1.5rem); max-height: calc(100dvh - var(--topbar-h) - var(--workspace-h) - 1rem); object-fit: contain; }
.workspace-panel {
  position: fixed;
  left: 0.7rem;
  right: 0.7rem;
  bottom: max(0.5rem, env(safe-area-inset-bottom));
  z-index: 45;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: min(62dvh, 34rem);
  padding: 0.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(5, 20, 15, 0.93);
  backdrop-filter: blur(14px);
  box-shadow: 0 -16px 50px rgba(0,0,0,0.58);
}
.detail-panel-deck { order: 1; min-height: 0; max-height: var(--workspace-panel-height, 220px); overflow: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); background: rgba(8, 28, 21, 0.88); }
.detail-panel-deck[hidden] { display: none !important; }
.panel-resize-handle { order: 2; height: 0.42rem; cursor: ns-resize; border-radius: 999px; background: linear-gradient(90deg, transparent, rgba(215,184,105,0.45), transparent); }
.detail-panel-deck[hidden] + .panel-resize-handle, .panel-resize-handle:has(+ .detail-panel-deck[hidden]) { display:none; }
.always-visible-timeline { order: 3; }
.bottom-dock { order: 4; position: sticky; bottom: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0.45rem; padding-top: 0.2rem; background: linear-gradient(180deg, transparent, rgba(5,20,15,0.95)); }
.dock-button {
  position: relative;
  min-height: 2.55rem;
  border: 1px solid rgba(143,230,163,0.34);
  border-radius: 999px;
  background: rgba(2, 10, 8, 0.82);
  color: var(--text);
  font-weight: 900;
  cursor: pointer;
}
.dock-button:hover { border-color: var(--gold); background: rgba(23, 58, 42, 0.88); }
.dock-button.is-active { border-color: var(--gold); background: linear-gradient(180deg, rgba(65, 100, 52, 0.78), rgba(13, 47, 34, 0.92)); box-shadow: inset 0 0 0 1px rgba(215,184,105,0.24), 0 0 0 2px rgba(215,184,105,0.12); }
.dock-button.has-data::after { content: attr(data-count); position: absolute; top: -0.55rem; right: 0.6rem; min-width: 1.2rem; height: 1.2rem; padding: 0 0.32rem; display: grid; place-items: center; border: 1px solid var(--gold); border-radius: 999px; background: #112a21; color: var(--gold); font-size: 0.68rem; }
.panel-heading-actions { display: flex; align-items: center; gap: 0.45rem; flex-wrap: wrap; justify-content: flex-end; }
.panel-collapse-button { border-color: rgba(215,184,105,0.38); }
.quicklearn-box { margin: 0.6rem 0 0.9rem; padding: 0.75rem; border: 1px dashed rgba(215,184,105,0.48); border-radius: var(--radius-sm); background: rgba(16, 42, 31, 0.68); }
.quicklearn-header { display:flex; align-items:center; justify-content:space-between; gap:0.7rem; flex-wrap:wrap; }
.quicklearn-header h3 { margin:0; font-size:1rem; }
.quicklearn-actions { display:flex; gap:0.45rem; flex-wrap:wrap; }
.quicklearn-slots { display:grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap:0.4rem; margin-top:0.55rem; }
.quicklearn-slot { display:grid; grid-template-columns: 1fr auto; gap:0.1rem 0.5rem; align-items:center; padding:0.5rem 0.6rem; border:1px solid var(--line); border-radius:0.75rem; background:rgba(0,0,0,0.18); }
.quicklearn-slot strong { font-size:0.82rem; }
.quicklearn-slot span { color:var(--muted); font-size:0.78rem; }
.quicklearn-slot small { grid-column:1/-1; color:var(--muted-2); font-size:0.68rem; }
.quicklearn-slot.is-current { border-color:var(--gold); box-shadow:0 0 0 2px rgba(215,184,105,0.12); }
.quicklearn-slot.is-assigned span { color:var(--green); font-weight:800; }
.learn-active { color: var(--green) !important; font-weight: 800; }
.performance-hud { max-width: min(31rem, calc(100vw - 2rem)); }

@media (max-width: 920px) {
  .top-group-toggle > small { display:none; }
  .top-group-toggle { min-width: 4.8rem; text-align:center; }
}
@media (max-width: 760px) {
  :root { --topbar-h: 0px; --workspace-h: 168px; }
  .mobile-controls-toggle { display:inline-flex; position:fixed; top:max(0.55rem, env(safe-area-inset-top)); right:0.6rem; z-index:120; }
  .sprint4c-topbar { inset:0 auto 0 0; width:min(22rem, 92vw); height:100dvh; overflow:auto; transform: translateX(-105%); transition: transform 180ms ease; padding:1rem; }
  .sprint4c-topbar.is-open { transform: translateX(0); }
  .thin-nav-row { align-items:flex-start; flex-direction:column; gap:1rem; }
  .top-group-buttons { width:100%; display:grid; grid-template-columns:1fr; }
  .top-group-toggle { max-width:none; width:100%; text-align:left; }
  .top-group-toggle > small { display:block; }
  .top-control-popover { position:static; width:100%; margin-top:0.45rem; padding:0.55rem; box-shadow:none; }
  .top-control-popover .control-group { display:grid; grid-template-columns:1fr; }
  .compact-field { grid-template-columns:1fr; }
  .video-stage { top:0; bottom:var(--workspace-h); }
  .status-hud { top:3.3rem; left:0.5rem; right:0.5rem; }
  .performance-hud { right:0.5rem; left:0.5rem; bottom:0.7rem; width:auto; font-size:0.72rem; }
  .workspace-panel { left:0; right:0; bottom:0; border-radius: var(--radius-sm) var(--radius-sm) 0 0; max-height:72dvh; padding:0.42rem; }
  .timeline-heading { align-items:flex-start; gap:0.45rem; }
  .compact-timeline-actions { width:100%; display:grid; grid-template-columns:1fr 1fr; }
  .bottom-dock { grid-template-columns: repeat(5, 1fr); gap:0.25rem; }
  .dock-button { min-height:2.85rem; font-size:0.72rem; border-radius:0.85rem; }
  .dock-button span { display:block; font-size:0.68rem; }
  .detail-panel-deck { max-height:42dvh; }
  #videoCanvas { max-width: 100vw; max-height: calc(100dvh - var(--workspace-h) - 0.5rem); }
}
@media (prefers-reduced-motion: reduce) { .sprint4c-topbar { transition:none; } }


/* === Sprint 4D: fixed region strip + bottom command bar + transparent settings popups === */
:root {
  --workspace-h: 150px;
  --bottom-popup-max-h: min(68dvh, 34rem);
}
.app-shell { height: 100dvh; padding-top: var(--topbar-h); display: block; }
.video-stage {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: var(--workspace-h);
  min-height: 10rem;
  padding: 0.55rem;
}
#videoCanvas {
  max-width: calc(100vw - 1rem);
  max-height: calc(100dvh - var(--topbar-h) - var(--workspace-h) - 1rem);
  object-fit: contain;
}
.workspace-panel {
  position: fixed;
  left: 0.7rem;
  right: 0.7rem;
  bottom: max(0.5rem, env(safe-area-inset-bottom));
  z-index: 45;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: none;
  min-height: 0;
  height: auto;
  overflow: visible;
  padding: 0.48rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(5, 20, 15, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: 0 -16px 50px rgba(0,0,0,0.58);
}
.always-visible-timeline {
  order: 1;
  flex: 0 0 auto;
  padding: 0.52rem;
  border-color: rgba(215,184,105,0.30);
  background: linear-gradient(180deg, rgba(9,27,21,0.88), rgba(5,18,14,0.88));
}
.timeline-heading { margin-bottom: 0.38rem; }
.timeline-heading .eyebrow { margin-bottom: 0.12rem; }
.compact-timeline-actions { gap: 0.35rem; }
.timeline-track { height: 2.85rem; }
.compact-region-list { max-height: 2.2rem; padding-bottom: 0; margin-top: 0.35rem; }
.compact-region-list .region-row { min-width: 9rem; padding: 0.35rem 0.55rem; }
.bottom-dock {
  order: 2;
  position: relative;
  bottom: auto;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.45rem;
  padding: 0;
  background: transparent;
}
.dock-button {
  min-height: 2.7rem;
  border-radius: 0.9rem;
  background: linear-gradient(180deg, rgba(4,14,11,0.98), rgba(10,33,25,0.92));
  border-color: rgba(143,230,163,0.38);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}
.dock-button.is-active {
  border-color: var(--gold);
  background: linear-gradient(180deg, rgba(53,72,34,0.94), rgba(12,52,35,0.96));
  color: #fff8df;
}
.detail-panel-deck {
  position: fixed;
  z-index: 105;
  left: max(1rem, env(safe-area-inset-left));
  right: max(1rem, env(safe-area-inset-right));
  bottom: calc(var(--workspace-h) + max(1.1rem, env(safe-area-inset-bottom)));
  width: min(68rem, calc(100vw - 2rem));
  margin-inline: auto;
  max-height: var(--bottom-popup-max-h);
  overflow: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(4, 14, 11, 0.82), rgba(14, 44, 32, 0.74));
  backdrop-filter: blur(20px) saturate(1.05);
  box-shadow: 0 30px 90px rgba(0,0,0,0.76), 0 0 0 1px rgba(143,230,163,0.08) inset;
  padding: 0.45rem;
}
.detail-panel-deck[hidden] { display: none !important; }
.detail-panel-deck.is-open { display: block; animation: popup-rise 140ms ease-out; }
.detail-panel {
  min-height: 0;
  border: 0;
  background: rgba(6, 20, 16, 0.54);
  border-radius: calc(var(--radius) - 4px);
  padding-bottom: 0.65rem;
}
.detail-panel.is-active { display: block; }
.panel-resize-handle { display: none !important; }
.panel-collapse-button::before { content: ''; }
.panel-collapse-button {
  border-color: rgba(215,184,105,0.55) !important;
  color: var(--text) !important;
  background: rgba(70, 34, 24, 0.36) !important;
}
.panel-collapse-button:hover { background: rgba(108, 50, 34, 0.52) !important; }
body.bottom-popup-open .detail-panel-deck::before {
  content: '';
  position: fixed;
  inset: -100vmax;
  z-index: -1;
  background: rgba(0,0,0,0.12);
  pointer-events: none;
}
@keyframes popup-rise {
  from { opacity: 0; transform: translateY(0.45rem) scale(0.992); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
#videoStage:fullscreen { padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left)); }
#videoStage:fullscreen #videoCanvas { max-width: 100%; max-height: 100%; }
#videoStage:fullscreen .status-hud { top: 1rem; }
#videoStage:fullscreen .performance-hud { bottom: 1rem; }
@media (max-width: 760px) {
  :root { --topbar-h: 0px; --workspace-h: 158px; --bottom-popup-max-h: 72dvh; }
  .video-stage { top: 0; bottom: var(--workspace-h); padding: 0.25rem; }
  #videoCanvas { max-width: 100vw; max-height: calc(100dvh - var(--workspace-h) - 0.5rem); }
  .workspace-panel { left: 0; right: 0; bottom: 0; border-radius: 16px 16px 0 0; padding: 0.4rem; gap: 0.35rem; }
  .timeline-heading { align-items: flex-start; }
  .compact-timeline-actions { display: grid; grid-template-columns: 1fr 1fr; width: 100%; }
  .timeline-track { height: 3.05rem; }
  .bottom-dock { gap: 0.25rem; }
  .dock-button { min-height: 3.05rem; border-radius: 0.8rem; flex-direction: column; gap: 0.05rem; font-size: 0.78rem; }
  .dock-button span { font-size: 0.66rem; }
  .detail-panel-deck {
    left: 0.55rem;
    right: 0.55rem;
    bottom: calc(var(--workspace-h) + 0.6rem);
    width: auto;
    max-height: var(--bottom-popup-max-h);
    border-radius: 18px;
    padding: 0.35rem;
  }
  .detail-panel { font-size: 0.92rem; }
  .panel-heading-actions { width: 100%; justify-content: flex-start; }
  .panel-collapse-button { min-height: 3rem; min-width: 8rem; }
  .performance-hud { bottom: calc(var(--workspace-h) + 0.65rem); max-height: 8.8rem; overflow: auto; }
  .status-hud { top: 3.3rem; }
}
@media (prefers-reduced-motion: reduce) { .detail-panel-deck.is-open { animation: none; } }

/* === Sprint 4E: content-fit guided popups, persistent fullscreen, collapsible HUD === */
:root {
  --popup-fit-w: min(48rem, calc(100vw - 2rem));
  --popup-fit-max-h: min(72dvh, 40rem);
}
.stage-fullscreen-button,
.hud-toggle {
  position: fixed;
  z-index: 70;
  right: max(0.85rem, env(safe-area-inset-right));
  border-radius: 999px;
  min-height: 2.7rem;
  padding: 0 1rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  cursor: pointer;
  backdrop-filter: blur(14px);
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}
.stage-fullscreen-button {
  bottom: calc(var(--workspace-h) + max(1rem, env(safe-area-inset-bottom)));
  color: #0a140f;
  background: linear-gradient(180deg, #ffe27a, #d5a92f);
  border: 1px solid rgba(255, 244, 173, 0.95);
  box-shadow: 0 0 0 1px rgba(0,0,0,0.35), 0 10px 26px rgba(0,0,0,0.48), 0 0 28px rgba(240,196,74,0.20);
}
.stage-fullscreen-button:hover,
.stage-fullscreen-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 0 0 2px rgba(255,236,143,0.35), 0 14px 32px rgba(0,0,0,0.58), 0 0 34px rgba(240,196,74,0.32);
}
.stage-fullscreen-button:active { transform: translateY(1px) scale(0.99); }
.hud-toggle {
  bottom: calc(var(--workspace-h) + 4.15rem + max(1rem, env(safe-area-inset-bottom)));
  color: var(--text);
  background: rgba(6, 22, 16, 0.86);
  border: 1px solid rgba(143,230,163,0.34);
}
.hud-toggle[aria-expanded="true"] {
  color: #0a140f;
  background: linear-gradient(180deg, #d9f3d6, #8fe6a3);
}
.performance-hud.is-collapsed { display: none !important; }
.performance-hud {
  max-width: min(34rem, calc(100vw - 1.5rem));
  max-height: min(36dvh, 17rem);
  overflow-y: auto;
  overflow-x: hidden;
}
.detail-panel-deck {
  left: 50% !important;
  right: auto !important;
  transform: translateX(-50%);
  width: var(--popup-fit-w) !important;
  max-width: calc(100vw - 2rem) !important;
  max-height: var(--popup-fit-max-h) !important;
  overflow: hidden !important;
  padding: 0.45rem !important;
  box-sizing: border-box;
}
.detail-panel-deck.is-open { display: block; }
.detail-panel {
  max-height: calc(var(--popup-fit-max-h) - 0.9rem);
  overflow-y: auto;
  overflow-x: hidden !important;
  box-sizing: border-box;
  padding: clamp(0.75rem, 1.5vw, 1rem) !important;
  scrollbar-gutter: stable;
}
.detail-panel > * { min-width: 0; }
.detail-panel .panel-heading {
  position: sticky;
  top: 0;
  z-index: 2;
  margin: calc(-1 * clamp(0.75rem, 1.5vw, 1rem)) calc(-1 * clamp(0.75rem, 1.5vw, 1rem)) 0.75rem;
  padding: 0.72rem clamp(0.75rem, 1.5vw, 1rem);
  border-radius: calc(var(--radius) - 6px) calc(var(--radius) - 6px) 0 0;
  background: linear-gradient(180deg, rgba(5, 20, 15, 0.98), rgba(5, 20, 15, 0.82));
  backdrop-filter: blur(14px);
}
.panel-help, .subtle { max-width: 68ch; }
.guided-steps {
  display: grid;
  gap: 0.75rem;
  counter-reset: guidedStep;
}
.step-callout,
.step-field,
.guided-form > .mini-field,
.guided-form > .toggle-field,
.guided-form > .mini-readout,
.guided-form > button,
.add-row.step-field,
.quicklearn-box.step-field,
.sequencer-controls.step-field,
.sequencer-steps.step-field,
.sequencer-editor.step-field {
  position: relative;
}
.step-callout {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.72rem;
  align-items: start;
  padding: 0.72rem;
  border: 1px solid rgba(215,184,105,0.34);
  border-radius: 1rem;
  background: linear-gradient(135deg, rgba(215,184,105,0.12), rgba(11,43,30,0.32));
}
.step-callout p { margin: 0.18rem 0 0; color: var(--muted); }
.step-medallion,
.guided-form > .mini-field::before,
.guided-form > .toggle-field::before,
.guided-form > .mini-readout::before,
.guided-form > button::before,
.add-row.step-field::before,
.quicklearn-box.step-field::before,
.sequencer-controls.step-field::before,
.sequencer-steps.step-field::before,
.sequencer-editor.step-field::before {
  width: 1.65rem;
  height: 1.65rem;
  min-width: 1.65rem;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  color: #fff7d9;
  font-weight: 950;
  font-size: 0.78rem;
  letter-spacing: 0;
  border: 1px solid rgba(255,221,116,0.88);
  background: radial-gradient(circle at 32% 25%, rgba(255,242,178,0.34), rgba(146,108,31,0.45)), rgba(34,64,37,0.86);
  box-shadow: 0 0 0 2px rgba(255,221,116,0.07), 0 0 20px rgba(215,184,105,0.18);
}
.guided-form { counter-reset: guidedStep calc(var(--step-offset, 1) - 1); }
.guided-form[data-step-start="2"] { --step-offset: 2; }
.guided-form[data-step-start="3"] { --step-offset: 3; }
.guided-form[data-step-start="4"] { --step-offset: 4; }
.guided-form > .mini-field,
.guided-form > .toggle-field,
.guided-form > .mini-readout,
.guided-form > button,
.add-row.step-field,
.quicklearn-box.step-field,
.sequencer-controls.step-field,
.sequencer-steps.step-field,
.sequencer-editor.step-field {
  padding-left: 2.35rem;
}
.guided-form > .mini-field::before,
.guided-form > .toggle-field::before,
.guided-form > .mini-readout::before,
.guided-form > button::before {
  counter-increment: guidedStep;
  content: counter(guidedStep);
  position: absolute;
  left: 0.25rem;
  top: 50%;
  transform: translateY(-50%);
}
.add-row.step-field::before { content: '2'; position:absolute; left:0.2rem; top:50%; transform:translateY(-50%); }
.quicklearn-box.step-field::before { content: '2'; position:absolute; left:0.75rem; top:0.8rem; }
.quicklearn-box.step-field { padding-left: 3.2rem !important; }
.sequencer-controls.step-field::before { content: '2'; position:absolute; left:0.2rem; top:50%; transform:translateY(-50%); }
.sequencer-steps.step-field::before { content: '3'; position:absolute; left:0.2rem; top:0.5rem; }
.sequencer-editor.step-field::before { content: '4'; position:absolute; left:0.2rem; top:0.75rem; }
.form-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
  gap: 0.65rem;
}
.one-column { grid-template-columns: 1fr; }
.add-row, .quicklearn-header, .sequencer-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}
.add-row select { min-width: min(22rem, 100%); flex: 1 1 16rem; }
.compact-card-list, .region-list.compact-list {
  max-height: min(16rem, 28dvh);
  overflow-y: auto;
  overflow-x: hidden;
}
.effect-param-panel { max-width: 100%; overflow-x: hidden; }
.detail-panel input,
.detail-panel select,
.detail-panel textarea,
.detail-panel button { max-width: 100%; }
#videoStage:fullscreen .workspace-panel,
#videoStage:fullscreen .detail-panel-deck,
#videoStage:fullscreen .status-hud,
#videoStage:fullscreen .stage-fullscreen-button,
#videoStage:fullscreen .hud-toggle { display: none !important; }
#videoStage:fullscreen .performance-hud:not(.is-collapsed) { display: grid !important; }
@media (max-width: 760px) {
  :root { --popup-fit-max-h: 74dvh; }
  .stage-fullscreen-button {
    right: max(0.5rem, env(safe-area-inset-right));
    bottom: calc(var(--workspace-h) + 0.55rem);
    min-height: 2.55rem;
    padding: 0 0.75rem;
  }
  .hud-toggle {
    right: max(0.5rem, env(safe-area-inset-right));
    bottom: calc(var(--workspace-h) + 3.55rem);
    min-height: 2.45rem;
    padding: 0 0.72rem;
  }
  .detail-panel-deck {
    width: calc(100vw - 1rem) !important;
    max-width: calc(100vw - 1rem) !important;
    bottom: calc(var(--workspace-h) + 0.55rem) !important;
  }
  .detail-panel {
    max-height: calc(var(--popup-fit-max-h) - 0.75rem);
    padding: 0.72rem !important;
  }
  .detail-panel .panel-heading {
    margin: -0.72rem -0.72rem 0.7rem;
    padding: 0.7rem;
  }
  .step-callout { grid-template-columns: auto minmax(0, 1fr); padding: 0.65rem; }
  .guided-form > .mini-field,
  .guided-form > .toggle-field,
  .guided-form > .mini-readout,
  .guided-form > button { padding-left: 2.15rem; }
  .quicklearn-box.step-field { padding-left: 2.85rem !important; }
  .performance-hud { left:0.5rem; right:0.5rem; bottom: calc(var(--workspace-h) + 3.1rem); max-height: 40dvh; }
}
/* Sprint 4E counter/sizing corrections */
.detail-panel-deck {
  width: fit-content !important;
  min-width: min(34rem, calc(100vw - 2rem));
}
.guided-form { counter-reset: guidedStep 1; }
.guided-form[data-step-start="2"] { counter-reset: guidedStep 1; }
.guided-form[data-step-start="3"] { counter-reset: guidedStep 2; }
.guided-form[data-step-start="4"] { counter-reset: guidedStep 3; }
@media (max-width: 760px) {
  .detail-panel-deck {
    width: calc(100vw - 1rem) !important;
    min-width: 0;
  }
}

/* === Sprint 5: focused uVJ repair === */
.controller-help {
  flex: 1 1 100%;
  max-width: 62rem;
  margin: 0.1rem 0 0;
}
.quicklearn-slot { grid-template-columns: minmax(0, 1fr) auto; }
.quicklearn-slot-learn {
  grid-row: 1 / span 2;
  grid-column: 2;
  align-self: center;
  min-height: 2.25rem;
  padding-inline: 0.65rem;
}
.quicklearn-slot.is-current span::before {
  content: '● ';
  color: var(--gold);
}
.sequencer-keyboard[hidden] { display: none !important; }
.sequencer-keyboard.is-open { display: grid; }
.timeline-drag-ghost {
  display: grid;
  place-items: center;
  min-width: 4rem;
  background: rgba(215,184,105,0.26);
  box-shadow: 0 0 0 2px rgba(215,184,105,0.16), 0 0 28px rgba(215,184,105,0.18);
}
.timeline-drag-ghost-label {
  padding: 0.2rem 0.4rem;
  border-radius: 999px;
  color: #fff6d4;
  background: rgba(5, 18, 13, 0.78);
  font-size: 0.68rem;
  font-weight: 850;
  white-space: nowrap;
  pointer-events: none;
}
.uvj-action-rail {
  position: fixed;
  z-index: 70;
  right: max(0.85rem, env(safe-area-inset-right));
  bottom: calc(var(--workspace-h) + max(1rem, env(safe-area-inset-bottom)));
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.65rem;
  pointer-events: none;
}
.uvj-action-rail .stage-fullscreen-button,
.uvj-action-rail .hud-toggle {
  position: static !important;
  right: auto !important;
  bottom: auto !important;
  pointer-events: auto;
}
.performance-hud:not(.is-collapsed) {
  bottom: calc(var(--workspace-h) + 6.95rem + max(1rem, env(safe-area-inset-bottom))) !important;
  right: max(0.85rem, env(safe-area-inset-right));
}
@media (max-width: 760px) {
  .uvj-action-rail {
    left: 0.55rem;
    right: 0.55rem;
    bottom: calc(var(--workspace-h) + 0.55rem);
    flex-direction: row;
    justify-content: center;
    align-items: center;
  }
  .uvj-action-rail .stage-fullscreen-button,
  .uvj-action-rail .hud-toggle {
    min-height: 2.55rem;
    flex: 0 1 10rem;
  }
  .performance-hud:not(.is-collapsed) {
    left: 0.5rem !important;
    right: 0.5rem !important;
    bottom: calc(var(--workspace-h) + 3.75rem) !important;
    max-height: 34dvh;
  }
  .quicklearn-slot { grid-template-columns: 1fr; }
  .quicklearn-slot-learn { grid-row: auto; grid-column: 1; width: 100%; }
}


/* === Sprint 5S: clock/CC timing clarity and stronger live region preview === */
.clock-sync-card {
  flex: 1 1 34rem;
  min-width: min(100%, 31rem);
  display: grid;
  gap: 0.45rem;
  padding: 0.45rem;
  border: 1px solid rgba(143,230,163,0.24);
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.16);
}
.clock-sync-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.45rem; min-width: 0; }
.bpm-field { grid-template-columns: auto 5.25rem; max-width: none; flex: 0 0 auto; }
.bpm-field span, .cc-sync-field span { white-space: nowrap; }
.bpm-field input {
  width: 5.25rem;
  min-width: 0;
  box-sizing: border-box;
  border: 0;
  border-radius: 0.5rem;
  padding: 0.35rem 0.45rem;
  background: rgba(0,0,0,0.24);
  color: var(--text);
  text-align: center;
  font: inherit;
}
.cc-sync-field { grid-template-columns: auto minmax(9rem, 13rem); flex: 1 1 15rem; }
.clock-source-button.is-active { border-color: var(--gold); color: #fff8df; background: rgba(79, 70, 33, 0.44); }
.clock-sync-status-row { display: grid; gap: 0.3rem; }
.clock-help { margin: 0; line-height: 1.35; }
.timeline-drag-ghost {
  z-index: 5;
  border: 2px solid var(--gold);
  border-style: solid;
  background: linear-gradient(180deg, rgba(215,184,105,0.34), rgba(68,212,119,0.18));
  box-shadow: 0 0 0 1px rgba(255,255,255,0.10) inset, 0 0 24px rgba(215,184,105,0.34);
}
.timeline-drag-ghost::before, .timeline-drag-ghost::after {
  content: '';
  position: absolute;
  top: -0.2rem;
  bottom: -0.2rem;
  width: 0.25rem;
  border-radius: 999px;
  background: var(--gold);
}
.timeline-drag-ghost::before { left: -0.12rem; }
.timeline-drag-ghost::after { right: -0.12rem; }
.timeline-drag-ghost-label {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  max-width: calc(100% - 0.4rem);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0.15rem 0.35rem;
  border-radius: 999px;
  background: rgba(0,0,0,0.55);
  color: #fff8df;
  font-size: 0.72rem;
  font-weight: 900;
  pointer-events: none;
}
.region-draft-stage-badge {
  position: absolute;
  left: 50%;
  bottom: max(0.8rem, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  z-index: 68;
  max-width: min(34rem, calc(100vw - 2rem));
  padding: 0.55rem 0.8rem;
  border: 1px solid rgba(215,184,105,0.72);
  border-radius: 999px;
  background: rgba(7,22,16,0.88);
  color: #fff8df;
  font-weight: 900;
  box-shadow: 0 14px 44px rgba(0,0,0,0.55), 0 0 24px rgba(215,184,105,0.22);
  backdrop-filter: blur(12px);
  text-align: center;
}
.region-draft-status {
  margin: 0.35rem 0 0;
  padding: 0.55rem 0.65rem;
  border: 1px dashed rgba(215,184,105,0.62);
  border-radius: var(--radius-sm);
  background: rgba(215,184,105,0.08);
  color: #fff8df;
  font-weight: 800;
}
@media (max-width: 760px) {
  .clock-sync-card { min-width: 0; }
  .clock-sync-row { display: grid; grid-template-columns: 1fr; }
  .bpm-field, .cc-sync-field { grid-template-columns: 1fr; width: 100%; }
  .bpm-field input { width: 100%; text-align: left; }
  .region-draft-stage-badge { bottom: calc(var(--workspace-h) + 0.85rem); border-radius: 1rem; }
}


/* === Sprint 5T: effect row editability and MIDI reset polish === */
.effect-row {
  align-items: center;
  grid-template-columns: minmax(0, 1fr) auto auto;
}
.effect-row em {
  color: var(--gold);
  font-style: normal;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
}
.effect-row:hover,
.effect-row:focus-visible {
  border-color: var(--gold);
  background: rgba(215,184,105,0.14);
  outline: none;
}
.effect-row.is-selected {
  box-shadow: inset 0 0 0 1px rgba(215,184,105,0.38), 0 0 0 1px rgba(215,184,105,0.18);
}
#resetMidiDefaultsButton {
  border-color: rgba(215,184,105,0.48);
}

/* === Sprint 5W repair: uVJ popup persistence, effect list edit rows, and transport mute fit === */
.top-control-popover .performance-group {
  display: grid;
  grid-template-columns: max-content minmax(min(18rem, 100%), 1.5fr) repeat(5, minmax(5.4rem, max-content));
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
}
.performance-group .group-label { align-self: center; }
.performance-group .wide-field {
  min-width: 0;
  width: 100%;
  grid-template-columns: auto minmax(0, 1fr);
}
.performance-group .wide-field select { width: 100%; min-width: 0; }
.performance-group .control-button,
.performance-group .toggle-field {
  min-width: 0;
  white-space: nowrap;
}
.transport-mute-button[aria-pressed="true"] {
  border-color: rgba(215,184,105,0.55);
  background: rgba(86, 62, 30, 0.42);
}
.effect-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 0.55rem;
}
.effect-row strong,
.effect-row span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.empty-state .empty-actions { max-width: 100%; }
#continueWithoutMidiButtonEmpty[hidden] { display: none !important; }
@media (max-width: 980px) {
  .top-control-popover .performance-group {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .performance-group .group-label,
  .performance-group .wide-field {
    grid-column: 1 / -1;
  }
}
@media (max-width: 760px) {
  .top-control-popover .performance-group {
    grid-template-columns: 1fr;
  }
  .performance-group .group-label,
  .performance-group .wide-field {
    grid-column: auto;
  }
  .performance-group .control-button,
  .performance-group .toggle-field {
    width: 100%;
  }
}

/* === Sprint 5W3: mobile drawer blur hardening ===
   The mobile Controls overlay must never leave a backdrop-filter layer over the app
   unless the drawer is actually open. Keep the dim layer cheap and body-state driven. */
@media (max-width: 760px) {
  .drawer-backdrop {
    display: block;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    background: rgba(0,0,0,0.42);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    transition: opacity 140ms ease, visibility 0s linear 140ms;
  }
  body.drawer-open .drawer-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition-delay: 0s;
  }
  body:not(.drawer-open) .drawer-backdrop,
  .drawer-backdrop[hidden] {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
  body:not(.drawer-open) .sprint4c-topbar {
    pointer-events: none;
    transform: translateX(-105%);
  }
  body.drawer-open .sprint4c-topbar,
  .sprint4c-topbar.is-open {
    pointer-events: auto;
    transform: translateX(0);
  }
}
@media (min-width: 761px) {
  .drawer-backdrop {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
}

/* === Sprint 5W4: fullscreen compositor + raw MIDI paint-storm hardening ===
   Fullscreen should be a single video surface. Keep controls and editor chrome out
   of the compositor path, and do not let the empty/onboarding layer cover the
   fullscreen canvas. */
body.uvj-fullscreen-active .app-topbar,
body.uvj-fullscreen-active .workspace-panel,
body.uvj-fullscreen-active .mobile-controls-toggle,
body.uvj-fullscreen-active .drawer-backdrop,
body.uvj-fullscreen-active .detail-panel-deck {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
}
#videoStage:fullscreen,
#videoStage:-webkit-full-screen {
  position: fixed !important;
  inset: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  height: 100dvh !important;
  min-height: 0 !important;
  padding: 0 !important;
  display: grid !important;
  place-items: center !important;
  overflow: hidden !important;
  background: #000 !important;
  background-image: none !important;
}
#videoStage:fullscreen #videoCanvas,
#videoStage:-webkit-full-screen #videoCanvas {
  max-width: 100vw !important;
  max-height: 100vh !important;
  max-height: 100dvh !important;
  box-shadow: none !important;
  background: #000 !important;
}
#videoStage:fullscreen .empty-state,
#videoStage:fullscreen .status-hud,
#videoStage:fullscreen .uvj-action-rail,
#videoStage:fullscreen .region-draft-stage-badge,
#videoStage:-webkit-full-screen .empty-state,
#videoStage:-webkit-full-screen .status-hud,
#videoStage:-webkit-full-screen .uvj-action-rail,
#videoStage:-webkit-full-screen .region-draft-stage-badge {
  display: none !important;
}
#videoStage:fullscreen .performance-hud,
#videoStage:-webkit-full-screen .performance-hud {
  display: none !important;
}


/* === Sprint 5W5: mobile video focus + user MIDI input filter ===
   Keep mobile video clear of long/wrapping status pills, and expose a mobile-only
   filter for dense CC/knob streams that can stutter small compositors. */
.mobile-midi-filter-card {
  display: grid;
  gap: 0.55rem;
  margin: 0.65rem 0 0.85rem;
  padding: 0.7rem;
  border: 1px solid rgba(215,184,105,0.36);
  border-radius: var(--radius-sm);
  background: rgba(7, 24, 18, 0.70);
}
.mobile-midi-filter-card h3 { margin: 0; font-size: 1rem; }
.mobile-midi-filter-card .subtle { margin: 0; line-height: 1.35; }
.midi-filter-field {
  display: grid;
  grid-template-columns: 1fr;
  align-items: stretch;
  gap: 0.35rem;
  width: 100%;
  padding: 0.5rem 0.6rem;
}
.midi-filter-field input[type="range"] {
  width: 100%;
  accent-color: var(--gold);
}
#midiFilterAmountReadout {
  justify-self: start;
  white-space: nowrap;
}
@media (min-width: 761px) {
  .mobile-midi-filter-card { display: none !important; }
}
@media (max-width: 760px) {
  .status-hud {
    top: max(0.62rem, env(safe-area-inset-top));
    left: 0.55rem;
    right: 9.8rem;
    z-index: 72;
    display: flex;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: 0.32rem;
    max-height: 2.2rem;
    overflow: hidden;
  }
  .status-hud .chip {
    min-width: 0;
    max-width: 100%;
    min-height: 1.92rem;
    padding: 0.28rem 0.48rem;
    font-size: 0.7rem;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  #videoStatusChip { flex: 1 1 auto; }
  #midiStatusChip { flex: 0 0 auto; }
  #localBoundaryChip,
  #presetStatusChip,
  #unsavedStatusChip,
  #localBoundaryChip[hidden],
  #presetStatusChip[hidden],
  #unsavedStatusChip[hidden] {
    display: none !important;
  }
}
@media (max-width: 390px) {
  .status-hud { right: 8.6rem; }
  #midiStatusChip { display: none !important; }
}


/* === Sprint 5W6: mobile MIDI filter defaults off + one-time mobile tip === */
.mobile-midi-notice-body p {
  margin: 0 0 0.75rem;
  line-height: 1.45;
}

.mobile-midi-notice-dialog .dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

@media (min-width: 761px) {
  #mobileMidiNoticeDialog {
    display: none !important;
  }
}