:root {
  color-scheme: dark;
  --ink: #0b0b0a;
  --ink-soft: #121210;
  --bone: #eeeae2;
  --bone-dim: #9a968e;
  --line: rgb(238 234 226 / 0.19);
  --line-strong: rgb(238 234 226 / 0.42);
  --signal: #ff5a36;
  --font-display: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --safe-top: max(22px, env(safe-area-inset-top));
  --safe-right: max(24px, env(safe-area-inset-right));
  --safe-bottom: max(22px, env(safe-area-inset-bottom));
  --safe-left: max(24px, env(safe-area-inset-left));
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
}

body {
  color: var(--bone);
  font-family: var(--font-mono);
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.app-shell {
  position: relative;
  min-height: 100dvh;
  isolation: isolate;
  overflow: hidden;
  overflow: clip;
  background: var(--ink);
}

#universe {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: none;
}

#universe.is-dragging {
  cursor: grabbing;
}

.grain {
  position: absolute;
  inset: -50%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.075;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.85'/%3E%3C/svg%3E");
  animation: grain-shift 0.35s steps(2) infinite;
}

.topbar {
  position: absolute;
  inset: var(--safe-top) var(--safe-right) auto var(--safe-left);
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  pointer-events: none;
}

.brand-lockup {
  display: flex;
  align-items: baseline;
  gap: 18px;
}

.brand {
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.35vw, 1.35rem);
  font-weight: 900;
  letter-spacing: -0.04em;
}

.brand-meta,
.system-status,
.text-button,
.tempo-rail,
.gesture-hint,
.intro-kicker,
.intro-footnote,
.guide-heading,
.guide-key {
  font-size: 0.625rem;
  line-height: 1;
  letter-spacing: 0.15em;
}

.brand-meta {
  color: var(--bone-dim);
}

.system-status {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-top: 5px;
  color: var(--bone-dim);
}

.status-light {
  width: 6px;
  height: 6px;
  border: 1px solid var(--bone-dim);
  background: transparent;
}

.status-light.is-live {
  border-color: var(--signal);
  background: var(--signal);
  box-shadow: 0 0 18px rgb(255 90 54 / 0.65);
}

.top-actions {
  display: flex;
  justify-self: end;
  gap: 20px;
  pointer-events: auto;
}

.text-button {
  padding: 4px 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease;
}

.text-button:hover {
  color: var(--signal);
  border-bottom-color: currentColor;
}

.text-button:active {
  transform: translateY(1px);
}

.tempo-rail {
  position: absolute;
  top: 50%;
  left: var(--safe-left);
  z-index: 5;
  display: grid;
  grid-template-rows: auto 146px auto auto;
  justify-items: center;
  gap: 12px;
  width: 26px;
  color: var(--bone-dim);
  transform: translateY(-48%);
}

.tempo-rail label {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.tempo-rail input {
  width: 146px;
  height: 20px;
  margin: 63px 0 0;
  appearance: none;
  background: transparent;
  transform: rotate(-90deg);
  cursor: ns-resize;
}

.tempo-rail input::-webkit-slider-runnable-track {
  height: 1px;
  background: var(--line-strong);
}

.tempo-rail input::-webkit-slider-thumb {
  width: 11px;
  height: 11px;
  margin-top: -5px;
  appearance: none;
  border: 2px solid var(--ink);
  border-radius: 0;
  background: var(--signal);
  box-shadow: 0 0 0 1px var(--signal);
}

.tempo-rail input::-moz-range-track {
  height: 1px;
  background: var(--line-strong);
}

.tempo-rail input::-moz-range-thumb {
  width: 9px;
  height: 9px;
  border: 1px solid var(--signal);
  border-radius: 0;
  background: var(--signal);
}

.tempo-rail output {
  margin-top: 3px;
  color: var(--bone);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.rail-unit {
  color: var(--bone-dim);
  font-size: 0.5rem;
}

.note-readout {
  position: absolute;
  top: 18%;
  right: var(--safe-right);
  z-index: 4;
  display: grid;
  justify-items: end;
  color: var(--bone-dim);
  opacity: 0;
  transform: translateX(12px);
  transition: opacity 140ms ease, transform 140ms ease;
  pointer-events: none;
}

.note-readout.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.note-readout span:first-child {
  color: var(--signal);
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 5.5rem);
  font-weight: 900;
  line-height: 0.85;
  letter-spacing: -0.07em;
}

.note-readout span:last-child {
  margin-top: 8px;
  font-size: 0.55rem;
  letter-spacing: 0.16em;
}

.control-deck {
  position: absolute;
  right: var(--safe-right);
  bottom: var(--safe-bottom);
  left: var(--safe-left);
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 32px;
  pointer-events: none;
}

.transport-group {
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
}

.primary-control,
.deck-button,
.launch-button {
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: rgb(11 11 10 / 0.76);
  color: var(--bone);
  font-size: 0.625rem;
  line-height: 1;
  letter-spacing: 0.13em;
  white-space: nowrap;
  cursor: pointer;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.primary-control,
.deck-button {
  padding: 0 18px;
}

.primary-control {
  min-width: 92px;
  border-color: var(--signal);
  background: var(--signal);
  color: var(--ink);
  font-weight: 800;
}

.deck-button:hover {
  border-color: var(--bone);
  background: var(--bone);
  color: var(--ink);
}

.primary-control:hover,
.launch-button:hover {
  background: var(--bone);
  border-color: var(--bone);
  color: var(--ink);
}

.primary-control:active,
.deck-button:active,
.launch-button:active {
  transform: translateY(1px) scale(0.985);
}

.scale-group {
  margin: 0;
  padding: 0;
  border: 0;
  pointer-events: auto;
}

.scale-group legend {
  width: 100%;
  margin: 0 0 9px;
  padding: 0;
  color: var(--bone-dim);
  font-size: 0.5rem;
  letter-spacing: 0.16em;
  text-align: right;
}

.segment-control {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line-strong);
  background: rgb(11 11 10 / 0.76);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.segment-control input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
}

.segment-control label {
  min-width: 76px;
  padding: 13px 12px;
  color: var(--bone-dim);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-align: center;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}

.segment-control label + input + label {
  border-left: 1px solid var(--line);
}

.segment-control input:checked + label {
  background: var(--bone);
  color: var(--ink);
}

.segment-control input:focus-visible + label {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.gesture-hint {
  position: absolute;
  right: var(--safe-right);
  bottom: calc(var(--safe-bottom) + 66px);
  z-index: 4;
  margin: 0;
  color: var(--bone-dim);
  pointer-events: none;
}

.center-play {
  position: absolute;
  z-index: 3;
  width: 72px;
  height: 72px;
  padding: 0;
  border: 0;
  background: transparent;
  color: transparent;
  cursor: pointer;
  pointer-events: auto;
}

.empty-state {
  position: absolute;
  top: 50%;
  left: 56%;
  z-index: 3;
  width: min(300px, 70vw);
  text-align: center;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.empty-state p {
  margin: 0 0 10px;
  color: var(--signal);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.empty-state span {
  color: var(--bone-dim);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
}

.intro {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(96px, 0.28fr) 1fr;
  grid-template-rows: 1fr auto;
  align-items: center;
  padding: clamp(80px, 10vh, 112px) var(--safe-right) var(--safe-bottom) var(--safe-left);
  background: linear-gradient(90deg, rgb(11 11 10 / 0.97) 0%, rgb(11 11 10 / 0.86) 46%, rgb(11 11 10 / 0.2) 100%);
  transition: opacity 600ms cubic-bezier(0.22, 1, 0.36, 1), visibility 600ms;
}

.intro.is-dismissed {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.intro-index {
  align-self: stretch;
  padding-top: 4px;
  border-right: 1px solid var(--line);
  color: var(--signal);
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 5vw, 5.8rem);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.08em;
}

.intro-copy {
  width: min(820px, 80vw);
  padding-left: clamp(30px, 5vw, 80px);
}

.intro-kicker {
  margin: 0 0 22px;
  color: var(--signal);
}

.intro h1,
.guide-dialog h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 7.2vw, 8.2rem);
  font-stretch: condensed;
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.075em;
}

.intro h1 {
  white-space: nowrap;
}

.intro-description {
  max-width: 46ch;
  margin: 27px 0 30px;
  color: var(--bone-dim);
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 1.2vw, 1.15rem);
  line-height: 1.45;
}

.launch-button {
  min-width: 210px;
  padding: 0 25px;
  border-color: var(--signal);
  background: var(--signal);
  color: var(--ink);
  font-weight: 800;
}

.intro-footnote {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  color: var(--bone-dim);
}

.guide-dialog {
  width: min(920px, calc(100vw - 48px));
  max-height: calc(100dvh - 48px);
  margin: auto;
  padding: 0;
  overflow: auto;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--ink-soft);
  color: var(--bone);
  box-shadow: 0 30px 100px rgb(0 0 0 / 0.58);
}

.guide-dialog::backdrop {
  background: rgb(0 0 0 / 0.74);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.guide-dialog form {
  padding: clamp(24px, 5vw, 58px);
}

.guide-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--signal);
}

.guide-dialog h2 {
  max-width: 750px;
  margin-top: clamp(32px, 6vh, 64px);
  font-size: clamp(2.6rem, 6vw, 6rem);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: clamp(34px, 6vh, 64px);
  background: var(--line);
}

.guide-grid section {
  min-height: 150px;
  padding: 24px;
  background: var(--ink-soft);
}

.guide-key {
  color: var(--signal);
}

.guide-grid p {
  max-width: 38ch;
  margin: 22px 0 0;
  color: var(--bone-dim);
  font-family: var(--font-display);
  font-size: 0.9rem;
  line-height: 1.5;
}

.guide-return {
  margin-top: 28px;
}

.toast {
  position: absolute;
  top: calc(var(--safe-top) + 46px);
  left: 50%;
  z-index: 20;
  padding: 10px 14px;
  border: 1px solid var(--signal);
  background: var(--ink);
  color: var(--signal);
  font-size: 0.56rem;
  letter-spacing: 0.12em;
  opacity: 0;
  transform: translate(-50%, -8px);
  transition: opacity 180ms ease, transform 180ms ease;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@keyframes grain-shift {
  0% { transform: translate3d(-2%, 1%, 0); }
  25% { transform: translate3d(1%, -2%, 0); }
  50% { transform: translate3d(2%, 2%, 0); }
  75% { transform: translate3d(-1%, -1%, 0); }
  100% { transform: translate3d(-2%, 1%, 0); }
}

@media (max-width: 820px) {
  :root {
    --safe-right: max(16px, env(safe-area-inset-right));
    --safe-left: max(16px, env(safe-area-inset-left));
  }

  .topbar {
    display: flex;
    justify-content: space-between;
  }

  .brand-lockup {
    display: grid;
    gap: 5px;
  }

  .system-status,
  .optional-control,
  .gesture-hint {
    display: none;
  }

  .top-actions {
    grid-column: 2;
  }

  .tempo-rail {
    top: auto;
    bottom: calc(var(--safe-bottom) + 94px);
    left: var(--safe-left);
    display: grid;
    grid-template-columns: auto minmax(90px, 28vw) auto auto;
    grid-template-rows: auto;
    align-items: center;
    width: auto;
    transform: none;
  }

  .tempo-rail label {
    writing-mode: initial;
    transform: none;
  }

  .tempo-rail input {
    width: 100%;
    height: 20px;
    margin: 0;
    transform: none;
    cursor: ew-resize;
  }

  .control-deck {
    grid-template-columns: 1fr;
    gap: 9px;
  }

  .transport-group {
    justify-content: stretch;
  }

  .primary-control,
  .deck-button {
    flex: 1;
    min-width: 0;
    padding: 0 10px;
  }

  .scale-group {
    grid-row: 1;
  }

  .scale-group legend {
    display: none;
  }

  .segment-control label {
    min-width: 0;
    padding: 10px 8px;
  }

  .note-readout {
    top: 19%;
  }

  .empty-state {
    left: 50%;
  }

  .intro {
    grid-template-columns: 58px 1fr;
    padding-top: 96px;
    background: rgb(11 11 10 / 0.91);
  }

  .intro-copy {
    width: auto;
    min-width: 0;
    padding-left: 22px;
  }

  .intro h1 {
    font-size: clamp(2.3rem, 10vw, 5.7rem);
    line-height: 0.86;
    white-space: normal;
  }

  .intro-description {
    max-width: 34ch;
    margin: 20px 0 24px;
    font-size: 0.82rem;
  }
}

@media (max-width: 520px) {
  .brand-meta,
  .intro-footnote span:first-child {
    display: none;
  }

  .top-actions {
    gap: 12px;
  }

  #guideButton {
    width: 18px;
    overflow: hidden;
    font-size: 0;
  }

  #guideButton::after {
    content: "?";
    font-size: 0.625rem;
  }

  .intro {
    grid-template-columns: 34px 1fr;
  }

  .intro-index {
    font-size: 1.9rem;
  }

  .intro-kicker {
    margin-bottom: 16px;
  }

  .launch-button {
    width: 100%;
    min-width: 0;
  }

  .guide-grid {
    grid-template-columns: 1fr;
  }

  .guide-grid section {
    min-height: 0;
  }
}

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

  .grain {
    animation: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .primary-control,
  .deck-button,
  .segment-control {
    background: var(--ink);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}