:root {
  --bg: #0b1020;
  --panel: rgba(15, 23, 42, 0.92);
  --accent: #06b6d4;
  --accent-2: #8b5cf6;
  --danger: #ef4444;
  --gold: #f59e0b;
  --text: #f8fafc;
  --muted: #94a3b8;
  --radius: 18px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0;
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

#app {
  position: relative;
  width: 100%; height: 100%;
}

#game-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  display: block;
}

#ui-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
#ui-layer > * { pointer-events: auto; }

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  gap: 18px;
  background: radial-gradient(ellipse at top, rgba(6,182,212,0.12), transparent 60%), var(--bg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.screen.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.logo {
  font-size: clamp(2.6rem, 10vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  text-transform: uppercase;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px rgba(6,182,212,0.25);
  margin-bottom: 6px;
}
.subtitle { color: var(--muted); font-size: 1rem; margin-top: -14px; }

.card {
  width: 100%; max-width: 420px;
  background: var(--panel);
  border: 1px solid rgba(148,163,184,0.12);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

input, button, .btn {
  width: 100%;
  font-size: 1rem;
  padding: 14px 18px;
  border-radius: 14px;
  border: none;
  outline: none;
}
input {
  background: rgba(30,41,59,0.7);
  color: var(--text);
  margin-bottom: 12px;
  border: 1px solid rgba(148,163,184,0.14);
}
input:focus { border-color: var(--accent); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.08s, filter 0.15s;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 6px 22px rgba(6,182,212,0.28);
}
.btn:active { transform: scale(0.97); }
.btn.secondary {
  background: rgba(30,41,59,0.9);
  color: var(--text);
  box-shadow: none;
}
.btn.gold { background: linear-gradient(135deg, var(--gold), #d97706); }
.btn.danger { background: linear-gradient(135deg, var(--danger), #b91c1c); }
.btn-row { display: flex; gap: 12px; width: 100%; max-width: 420px; }
.btn-row .btn { flex: 1; }

.hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
  display: flex; justify-content: space-between; align-items: flex-start;
  pointer-events: none;
}
.hud > div { pointer-events: auto; }
.hud-stats {
  display: flex; flex-direction: column; gap: 6px;
}
.hud-pill {
  background: rgba(15,23,42,0.75);
  border: 1px solid rgba(148,163,184,0.12);
  border-radius: 999px;
  padding: 7px 14px;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
}
.hud-right { display: flex; gap: 8px; }
.hud-btn {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: rgba(15,23,42,0.75);
  border: 1px solid rgba(148,163,184,0.12);
  color: var(--text);
  display: grid; place-items: center;
  font-size: 1.1rem;
  cursor: pointer;
}

.touch-controls {
  position: absolute;
  bottom: calc(18px + env(safe-area-inset-bottom));
  left: 18px; right: 18px;
  display: flex; justify-content: space-between; align-items: flex-end;
  pointer-events: none;
}
.joystick-zone {
  width: 140px; height: 140px;
  border-radius: 50%;
  background: rgba(255,255,255,0.04);
  border: 2px solid rgba(255,255,255,0.08);
  pointer-events: auto;
  position: relative;
}
.joystick-knob {
  position: absolute;
  left: 50%; top: 50%;
  width: 54px; height: 54px;
  border-radius: 50%;
  background: rgba(6,182,212,0.35);
  border: 2px solid rgba(6,182,212,0.6);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 20px rgba(6,182,212,0.3);
}
.fire-btn {
  width: 92px; height: 92px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(239,68,68,0.9), rgba(185,28,28,0.9));
  border: 2px solid rgba(255,255,255,0.18);
  pointer-events: auto;
  display: grid; place-items: center;
  font-weight: 800; font-size: 0.75rem; letter-spacing: 0.04em;
  color: #fff;
  box-shadow: 0 8px 30px rgba(239,68,68,0.35);
  transition: transform 0.06s;
}
.fire-btn:active { transform: scale(0.92); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.stat-card {
  background: rgba(30,41,59,0.55);
  border-radius: 14px;
  padding: 14px;
  text-align: center;
}
.stat-card .value { font-size: 1.4rem; font-weight: 800; color: var(--accent); }
.stat-card .label { font-size: 0.75rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }

.shop-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px;
  background: rgba(30,41,59,0.5);
  border-radius: 14px;
  margin-bottom: 10px;
}
.shop-item .swatch {
  width: 28px; height: 28px; border-radius: 50%;
  box-shadow: 0 0 12px currentColor;
}
.shop-item .info { flex: 1; padding: 0 12px; }
.shop-item .name { font-weight: 700; }
.shop-item .cost { color: var(--gold); font-weight: 700; }
.shop-item.owned { opacity: 0.6; }

.list-scroll {
  max-height: 48vh;
  overflow-y: auto;
  padding-right: 6px;
}
.list-scroll::-webkit-scrollbar { width: 6px; }
.list-scroll::-webkit-scrollbar-thumb { background: rgba(148,163,184,0.25); border-radius: 4px; }

.mission {
  display: flex; align-items: center; gap: 12px;
  background: rgba(30,41,59,0.5);
  border-radius: 14px;
  padding: 12px;
  margin-bottom: 10px;
}
.mission .progress-bar {
  flex: 1; height: 8px; background: rgba(148,163,184,0.15); border-radius: 4px; overflow: hidden;
}
.mission .progress-fill { height: 100%; background: var(--accent); border-radius: 4px; }

.toast {
  position: absolute;
  top: calc(14px + env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%) translateY(-80px);
  background: var(--panel);
  border: 1px solid rgba(148,163,184,0.12);
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 700;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: transform 0.35s, opacity 0.35s;
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }

.small { font-size: 0.8rem; color: var(--muted); }
.energy-bar {
  width: 100%; height: 6px; background: rgba(148,163,184,0.15); border-radius: 3px; margin-top: 6px;
}
.energy-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 3px; transition: width 0.15s linear; }

.hidden { display: none !important; }