:root {
  --bg: #070c10;
  --ink: #d7e3ed;
  --ink-dim: #8fa4b4;
  --line: rgba(190, 210, 224, 0.32);
  --panel: rgba(7, 12, 16, 0.42);
  --panel-strong: rgba(7, 12, 16, 0.64);
  --active: #8ee7ff;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 12%, rgba(80, 130, 170, 0.16), transparent 44%),
    radial-gradient(circle at 84% 82%, rgba(60, 95, 120, 0.16), transparent 40%),
    var(--bg);
}

#camera {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  visibility: visible;
}

body.gl-active #camera {
  visibility: hidden;
}

#glCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0;
  transition: opacity 180ms ease;
}

body.gl-active #glCanvas {
  opacity: 1;
}

#overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  z-index: 1;
}

.splash {
  position: fixed;
  inset: 0;
  z-index: 12;
  display: grid;
  place-items: center;
  padding: 1rem;
  pointer-events: auto;
  background: rgba(5, 9, 12, 0.55);
  transition: opacity 220ms ease, visibility 220ms ease;
}

.splash.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.splash-box {
  width: min(620px, 94vw);
  border: 1px solid var(--line);
  background: var(--panel-strong);
  padding: 1rem 1.1rem;
  color: var(--ink);
  line-height: 1.45;
}

.splash-box h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.18rem, 2.8vw, 1.7rem);
  letter-spacing: 0.08em;
  font-weight: 700;
}

.splash-box p {
  margin: 0.36rem 0;
  font-size: 0.92rem;
  color: var(--ink-dim);
}

.splash-box kbd {
  font: inherit;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 0.04rem 0.34rem;
  background: rgba(255, 255, 255, 0.04);
}

#splashStartBtn {
  margin-top: 0.9rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink);
  padding: 0.58rem 0.7rem;
  font: inherit;
  font-size: 0.84rem;
  cursor: pointer;
}

#splashStartBtn:hover {
  background: rgba(255, 255, 255, 0.09);
}

#splashStartBtn:disabled {
  opacity: 0.68;
  cursor: wait;
}

.hud {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.hud-tip {
  position: fixed;
  bottom: calc(0.8rem + env(safe-area-inset-bottom));
  left: calc(0.9rem + env(safe-area-inset-left));
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 0.28rem 0.52rem;
  color: var(--ink-dim);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
}

.drawer-toggle {
  position: fixed;
  top: calc(0.8rem + env(safe-area-inset-top));
  right: calc(0.8rem + env(safe-area-inset-right));
  z-index: 20;
  pointer-events: auto;
  width: 2.45rem;
  height: 2.45rem;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-size: 1rem;
  cursor: pointer;
  display: grid;
  place-items: center;
}

.drawer-toggle:hover {
  background: rgba(7, 12, 16, 0.65);
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(340px, 90vw);
  height: 100%;
  padding: calc(4.2rem + env(safe-area-inset-top)) 1rem calc(1rem + env(safe-area-inset-bottom));
  background: var(--panel);
  backdrop-filter: blur(4px);
  border-left: 1px solid var(--line);
  transform: translateX(102%);
  transition: transform 200ms ease;
  pointer-events: auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  overflow-y: auto;
}

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

.status-row {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.status-row span {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.7rem;
  padding: 0.52rem 0;
  color: var(--ink-dim);
  font-size: 0.82rem;
  border-bottom: 1px dotted rgba(190, 210, 224, 0.2);
}

.status-row span:last-child {
  border-bottom: 0;
}

.status-row strong {
  color: var(--ink);
  font-weight: 600;
}

#cameraStatus,
#faceStatus,
#midiStatus {
  color: var(--ink);
  font-weight: 600;
}

#startBtn {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink);
  padding: 0.64rem 0.7rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  text-align: left;
}

#startBtn:hover {
  background: rgba(255, 255, 255, 0.08);
}

#startBtn:disabled {
  opacity: 0.7;
  cursor: wait;
}

.logic-mode-row {
  display: flex;
  align-items: center;
  gap: 0.58rem;
  border: 1px solid rgba(190, 210, 224, 0.25);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink-dim);
  padding: 0.48rem 0.54rem;
  font-size: 0.76rem;
  user-select: none;
}

.logic-mode-row input {
  margin: 0;
}

.logic-mode-row strong {
  margin-left: auto;
  color: var(--ink);
  font-weight: 700;
  text-transform: lowercase;
}

.preset-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.44rem;
}

.sound-btn {
  border: 1px solid rgba(190, 210, 224, 0.25);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink-dim);
  padding: 0.45rem 0.5rem;
  font-size: 0.74rem;
  cursor: pointer;
  text-align: left;
}

.sound-btn:hover {
  color: var(--ink);
  border-color: rgba(190, 210, 224, 0.45);
}

.sound-btn.is-active {
  border-color: var(--active);
  color: var(--ink);
  background: rgba(142, 231, 255, 0.1);
}

@media (max-width: 760px) {
  .hud-tip {
    left: calc(0.7rem + env(safe-area-inset-left));
    bottom: calc(0.7rem + env(safe-area-inset-bottom));
    font-size: 0.7rem;
  }

  .drawer-toggle {
    top: calc(0.65rem + env(safe-area-inset-top));
    right: calc(0.65rem + env(safe-area-inset-right));
  }

  .drawer {
    width: min(320px, 94vw);
    padding-left: 0.82rem;
    padding-right: 0.82rem;
  }

  .splash-box {
    padding: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  #glCanvas,
  .splash,
  .drawer {
    transition: none;
  }
}