:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #22c55e;
  --accent-2: #38bdf8;
  --warn: #f59e0b;
  --danger: #ef4444;
  --button: #334155;
  --button-hover: #475569;
  --button-active: #22c55e;
}

* {
  box-sizing: border-box;
  min-width: 0;
}

body {
  margin: 0;
  padding: 16px;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
  color: var(--text);
}

h1 {
  margin: 0 0 8px;
  font-size: 1.6rem;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.app {
  width: min(1100px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.panel {
  width: 100%;
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.controls {
  display: grid;
  gap: 14px;
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

button,
input[type="range"] {
  cursor: pointer;
}

.ui-btn {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--accent-2);
  color: #001018;
  font-weight: 700;
}

.ui-btn.secondary {
  background: #334155;
  color: var(--text);
}

.readout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: center;
  font-size: 0.95rem;
}

.label {
  color: var(--muted);
}

.value {
  text-align: right;
  font-weight: 700;
}

.value.good {
  color: var(--accent);
}

.value.warn {
  color: var(--warn);
}

.value.bad {
  color: var(--danger);
}

.range-wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: center;
}

.range-wrap input {
  width: 100%;
}

.video-wrap {
  position: relative;
  overflow: hidden;
  background: #020617;
  aspect-ratio: 16 / 9;
}

video,
canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

video {
  transform: scaleX(-1);
}

#overlay {
  pointer-events: none;
}

.prototype {
  display: grid;
  gap: 20px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.96) 100%);
}

.prototype-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.status-pill {
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(51, 65, 85, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.15);
  font-size: 0.9rem;
}

.prototype-stage {
  position: relative;
  min-height: 260px;
  display: grid;
  align-items: end;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  width: 100%;
}

.target-btn {
  min-height: 84px;
  border-radius: 16px;
  border: 2px solid rgba(255, 255, 255, 0.08);
  background: var(--button);
  color: white;
  font-size: clamp(0.8rem, 2vw, 1rem);
  font-weight: 700;
  text-align: center;
  padding: 10px 6px;
  display: grid;
  place-items: center;
  transition: transform 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
}

.target-btn.hovered {
  background: var(--button-hover);
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
  transform: translateY(-4px);
}

.target-btn.activated {
  background: var(--button-active);
  color: #03210f;
  border-color: #bbf7d0;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.25);
  transform: translateY(-6px);
}

.cursor {
  position: absolute;
  top: 52%;
  left: 50%;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.25;
  pointer-events: none;
  transition: opacity 0.12s ease;
  background: radial-gradient(circle at 35% 35%, #ffffff 0%, #cbd5e1 45%, #38bdf8 100%);
  box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.16), 0 0 18px rgba(56, 189, 248, 0.6);
}

.cursor.grabbed {
  opacity: 1;
}

.cursor::after {
  content: "";
  position: absolute;
  inset: -12px;
  border: 2px solid rgba(248, 250, 252, 0.18);
  border-radius: 50%;
}

.toast {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(34, 197, 94, 0.35);
  color: #dcfce7;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.toast.show {
  opacity: 1;
}

@media (max-width: 600px) {
  .panel {
    padding: 12px;
  }

  .button-row {
    gap: 6px;
  }

  .target-btn {
    min-height: 72px;
    font-size: 0.72rem;
    padding: 8px 4px;
  }

  .cursor {
    width: 24px;
    height: 24px;
  }
}

.volume-stage {
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.volume-track {
  width: 90%;
  height: 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.12);
}

.volume-fill {
  height: 100%;
  width: 50%;
  background: linear-gradient(90deg, #38bdf8 0%, #22c55e 100%);
  transition: width 0.08s linear;
}

.target-btn.glowing {
  box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.9), 0 0 12px rgba(255, 215, 0, 0.8);
}