:root {
  --bg: #0a1020;
  --panel: rgba(15, 25, 45, 0.88);
  --accent: #4fd1c5;
  --a: #ff9e4d;
  --t: #5ec4ff;
  --g: #8de17a;
  --c: #ff7aa5;
  --text: #f2f6fa;
  --muted: #b0c4de;
  --radius: 18px;
  --shadow: 0 12px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: radial-gradient(ellipse at 20% 20%, #17243e 0%, #0a1020 60%, #050815 100%);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

#canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 50;
  background: var(--bg);
  transition: opacity 0.4s ease;
}

.hidden { opacity: 0 !important; pointer-events: none !important; }

.spinner {
  width: 48px;
  height: 48px;
  border: 5px solid rgba(255,255,255,0.15);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

#top-ui {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  z-index: 20;
  pointer-events: none;
}

#top-ui h1 {
  margin: 0;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--accent);
  text-shadow: 0 2px 12px rgba(79,209,197,0.3);
  pointer-events: auto;
}

.icon-btn {
  pointer-events: auto;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  width: 42px;
  height: 42px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text);
  transition: transform 0.15s, background 0.2s;
}

.icon-btn:hover, .icon-btn:focus { transform: scale(1.08); background: rgba(255,255,255,0.1); }

#ui-layer {
  display: contents;
}

.panel, .picker, .bubble {
  position: absolute;
  pointer-events: auto;
  z-index: 100;
  background: var(--panel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.bubble {
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  max-width: min(86vw, 520px);
  padding: 16px 22px;
  text-align: center;
}

.bubble p { margin: 0; font-size: 1.05rem; line-height: 1.45; }

.panel, .picker {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(92vw, 540px);
  max-height: 86vh;
  overflow-y: auto;
  padding: 22px;
}

.picker { text-align: center; }

.panel h2, .picker h2 { margin: 0 0 10px; font-size: 1.35rem; color: var(--accent); }

.panel p, .picker p { margin: 0 0 18px; color: var(--muted); line-height: 1.45; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }

button, .btn {
  appearance: none;
  border: none;
  border-radius: 999px;
  padding: 12px 22px;
  font: inherit;
  font-weight: 700;
  font-size: 1rem;
  color: #061018;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.2s;
  box-shadow: 0 6px 18px rgba(79,209,197,0.25);
}

button:hover, button:focus, .btn:hover, .btn:focus { transform: translateY(-2px); box-shadow: 0 9px 24px rgba(79,209,197,0.35); }

button.secondary { background: rgba(255,255,255,0.12); color: var(--text); box-shadow: none; }
button.secondary:hover, button.secondary:focus { background: rgba(255,255,255,0.2); }

.creature-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.creature-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 18px 10px;
  cursor: pointer;
  transition: transform 0.15s, background 0.2s;
}

.creature-card:hover, .creature-card:focus { transform: scale(1.04); background: rgba(255,255,255,0.12); }

.creature-card .emoji { font-size: 2.4rem; display: block; margin-bottom: 6px; }

.coverage-label { display: block; margin-bottom: 8px; font-weight: 700; }

input[type="range"] {
  width: 100%;
  margin-bottom: 14px;
  accent-color: var(--accent);
}

#read-pool {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 12px;
  min-height: 80px;
  background: rgba(0,0,0,0.25);
  border-radius: 14px;
  margin-bottom: 12px;
  user-select: none;
}

.read-card {
  width: 78px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: #061018;
  border-radius: 10px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  cursor: grab;
  touch-action: none;
  position: relative;
}

.read-card:active { cursor: grabbing; transform: scale(1.05); }

.read-card .letter { pointer-events: none; }

#puzzle-area {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: nowrap;
  gap: 0;
  min-height: 80px;
  margin-bottom: 12px;
  background: rgba(255,255,255,0.05);
  border-radius: 14px;
  overflow-x: auto;
  position: relative;
  padding: 10px;
}

.puzzle-slot, .placed-card {
  width: 78px;
  height: 54px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-weight: 700;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.puzzle-slot {
  background: rgba(255,255,255,0.06);
  border: 1px dashed rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.25);
}

.placed-card { background: #fff; color: #061018; }

#protein-canvas {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin: 14px 0;
}

.amino-bead {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #061018;
  box-shadow: 0 3px 8px rgba(0,0,0,0.18);
}

.effect-card {
  background: rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 14px;
  text-align: center;
  font-weight: 600;
}

#mutation-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 12px;
}

.base-btn {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  font-size: 1.2rem;
  font-weight: 800;
  color: #061018;
  cursor: pointer;
}

#progress-rail {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px 18px;
  z-index: 20;
  pointer-events: none;
}

#progress-steps {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  overflow-x: auto;
  padding: 8px;
  background: var(--panel);
  border-radius: 999px;
  pointer-events: auto;
  box-shadow: var(--shadow);
  scrollbar-width: none;
}

#progress-steps::-webkit-scrollbar { display: none; }

.step {
  flex: 1 0 auto;
  min-width: 44px;
  text-align: center;
  padding: 8px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}

.step.current { background: var(--accent); color: #061018; }

.step.done { color: var(--text); }

@media (max-width: 640px) {
  .panel, .picker { width: 96vw; padding: 16px; }
  .creature-cards { grid-template-columns: 1fr 1fr; }
  .actions { justify-content: center; }
  #progress-steps { font-size: 0.7rem; gap: 4px; }
}

@media (max-width: 380px) {
  .panel, .picker { width: 98vw; padding: 14px; }
  .step { min-width: 36px; padding: 7px 6px; font-size: 0.65rem; }
  .read-card, .puzzle-slot, .placed-card { width: 62px; height: 46px; font-size: 0.65rem; }
}