:root {
  --bg: #000;
  --fg: #fff;
  --dim: #8a8a8a;
  --panel: #141414;
  --line: #2a2a2a;
  --accent: #ff3b30;
  --marker-pos: 35%;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-text-size-adjust: 100%;
}

/* ---------- Editor ---------- */

#editor {
  max-width: 46rem;
  margin: 0 auto;
  padding: max(1.5rem, env(safe-area-inset-top)) 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

h1 {
  font-size: 1.5rem;
  margin: 0 0 .35rem;
  letter-spacing: .01em;
}

.note {
  margin: 0;
  color: var(--dim);
  font-size: .8125rem;
  line-height: 1.5;
}

.field {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  font-size: .875rem;
}

.field > span {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  color: var(--dim);
}

.field output { color: var(--fg); font-variant-numeric: tabular-nums; }

textarea {
  width: 100%;
  min-height: 40vh;
  resize: vertical;
  padding: .875rem 1rem;
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--line);
  border-radius: .5rem;
  font: 1rem/1.6 ui-monospace, SFMono-Regular, Menlo, monospace;
}

textarea:focus-visible, input:focus-visible, button:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 2px;
}

.settings {
  display: grid;
  gap: 1.1rem;
  padding: 1.1rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: .5rem;
}

.field.checkbox {
  flex-direction: row;
  align-items: center;
  gap: .625rem;
  color: var(--fg);
}

.field.checkbox span { color: var(--fg); }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 1.5rem;
  background: transparent;
  margin: 0;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  background: var(--line);
  border-radius: 2px;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: -.55rem;
  border-radius: 50%;
  background: var(--fg);
  border: none;
}

input[type="range"]::-moz-range-track {
  height: 3px;
  background: var(--line);
  border-radius: 2px;
}

input[type="range"]::-moz-range-thumb {
  width: 1.25rem;
  height: 1.25rem;
  border: none;
  border-radius: 50%;
  background: var(--fg);
}

input[type="checkbox"] {
  width: 1.15rem;
  height: 1.15rem;
  accent-color: var(--fg);
  margin: 0;
}

.actions { display: flex; gap: .625rem; flex-wrap: wrap; }

button {
  font: inherit;
  font-size: .9375rem;
  padding: .7rem 1.1rem;
  border-radius: .5rem;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--fg);
  cursor: pointer;
  min-height: 2.75rem;
}

button.primary {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
  font-weight: 600;
}

/* ---------- Prompter stage ---------- */

#stage {
  position: fixed;
  inset: 0;
  background: var(--bg);
}

#viewport {
  position: absolute;
  inset: 0;
  overflow-y: scroll;
  overscroll-behavior: contain;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

#viewport::-webkit-scrollbar { width: 0; height: 0; }

#text {
  padding: 0 clamp(1rem, 4vw, 4rem);
  font-size: var(--prompt-size, 64px);
  line-height: 1.35;
  font-weight: 600;
  letter-spacing: .005em;
  white-space: pre-wrap;
  overflow-wrap: break-word;
  text-align: left;
}

#text .ln { margin: 0; }
#text .ln.blank { min-height: 1.35em; }

#marker {
  position: absolute;
  left: 0;
  right: 0;
  top: var(--marker-pos);
  height: 0;
  border-top: 2px solid var(--accent);
  opacity: .55;
  pointer-events: none;
}

#pauseBadge {
  position: absolute;
  left: 50%;
  top: calc(var(--marker-pos) + 1rem);
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: .75rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .3rem .6rem;
  border-radius: 999px;
  pointer-events: none;
}

#stageHint {
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%);
  margin: 0;
  width: min(22rem, 82vw);
  text-align: center;
  color: var(--dim);
  font-size: 1.125rem;
  line-height: 1.6;
  pointer-events: none;
}

#stageHint small { font-size: .875rem; }
#stageHint b { color: var(--fg); font-weight: 600; }

#hud {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: .625rem .875rem calc(.625rem + env(safe-area-inset-bottom));
  background: #0a0a0a;
  border-top: 1px solid var(--line);
  transition: transform .18s ease;
}

.hud-row {
  display: flex;
  align-items: center;
  gap: .5rem;
}

#stage.hud-hidden #hud { transform: translateY(110%); }

#hud button {
  padding: .5rem .8rem;
  min-height: 2.25rem;
  font-size: .8125rem;
}

#hudReadout { margin-left: auto; }

.hud-field {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .75rem;
  color: var(--dim);
  flex: 1 1 0;
  min-width: 0;
}

.hud-field input[type="range"] { flex: 1; }

#hudReadout {
  font-size: .75rem;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

#hudToggle {
  position: absolute;
  right: 1rem;
  bottom: calc(.75rem + env(safe-area-inset-bottom));
  display: none;
  padding: .4rem .7rem;
  min-height: 0;
}

#stage.hud-hidden #hudToggle { display: block; }

@media (max-width: 26rem) {
  #hud button { padding: .5rem .65rem; }
  #hudReadout { font-size: .6875rem; }
}