* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --cyan: #59d9ff;
  --mint: #7dffce;
  --gold: #ffd166;
  --danger: #ff5470;
  --bg: #071018;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: #e8f4ff;
  -webkit-user-select: none;
  user-select: none;
}

#game {
  position: fixed;
  inset: 0;
  display: block;
}

/* ---------- HUD ---------- */
#hud {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 14px 26px;
  pointer-events: none;
}

.hud-left, .hud-right { display: flex; flex-direction: column; gap: 2px; }
.hud-right { text-align: right; }

.hud-row { display: flex; gap: 12px; align-items: baseline; }
.hud-end { justify-content: flex-end; }

.hud-label { font-size: 10px; letter-spacing: 3px; color: #5f7b95; }

.hud-value {
  font-size: 21px;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 10px rgba(89,217,255,.45);
  font-variant-numeric: tabular-nums;
}

.hud-value.gold { color: var(--gold); text-shadow: 0 0 10px rgba(255,209,102,.5); }

.hud-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.btn-wave {
  margin-top: 2px;
  padding: 5px 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--gold);
  background: rgba(255,209,102,.08);
  border: 1.5px solid rgba(255,209,102,.55);
  border-radius: 16px;
  cursor: pointer;
  pointer-events: auto;
}

.btn-wave:hover { background: rgba(255,209,102,.22); }

.speed-btn {
  margin-top: 6px;
  background: rgba(89,217,255,.07);
  border: 1px solid rgba(89,217,255,.4);
  color: var(--cyan);
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  cursor: pointer;
  pointer-events: auto;
}

.speed-btn.fast { background: rgba(89,217,255,.25); }

/* ---------- Tienda ---------- */
.shop {
  position: fixed;
  bottom: 44px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 6;
}

.shop-btn {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 128px;
  padding: 9px 13px;
  border: 1.5px solid rgba(125,255,206,.35);
  border-radius: 12px;
  background: rgba(7,16,24,.75);
  color: #d9f5ec;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: all .15s;
}

.shop-btn b { color: var(--gold); margin-right: 6px; }
.shop-btn .cost { float: right; color: var(--gold); font-weight: 700; }
.shop-btn small { font-size: 10px; letter-spacing: .5px; color: #7fa3b8; }

.shop-btn:hover:not(.disabled) { border-color: var(--mint); transform: translateY(-2px); }
.shop-btn.active { border-color: var(--mint); background: rgba(125,255,206,.14); box-shadow: 0 0 18px rgba(125,255,206,.25); }
.shop-btn.disabled { opacity: .38; cursor: default; }

.panel {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 150px;
  padding: 9px 13px;
  border: 1.5px solid rgba(255,209,102,.4);
  border-radius: 12px;
  background: rgba(7,16,24,.85);
}

.panel-name { font-size: 12px; letter-spacing: 2px; color: var(--gold); font-weight: 700; }

.p-btn {
  padding: 5px 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--cyan);
  background: rgba(89,217,255,.08);
  border: 1px solid rgba(89,217,255,.45);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}

.p-btn:hover { background: rgba(89,217,255,.2); }
.p-btn.sell { color: var(--danger); border-color: rgba(255,84,112,.45); background: rgba(255,84,112,.06); }
.p-btn.sell:hover { background: rgba(255,84,112,.18); }

#hintbar {
  position: fixed;
  bottom: 15px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10.5px;
  letter-spacing: 2px;
  color: #48657c;
  white-space: nowrap;
  pointer-events: none;
}

/* ---------- Overlays ---------- */
.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 17px;
  text-align: center;
  background: radial-gradient(ellipse at center, rgba(8,17,26,.87) 0%, rgba(7,16,24,.97) 100%);
  z-index: 10;
  padding: 24px;
}

.hidden { display: none !important; }

.game-title {
  font-size: clamp(46px, 9vw, 94px);
  font-weight: 800;
  letter-spacing: 11px;
  line-height: 1;
  color: #f0f8ff;
  margin-left: 11px;
}

.game-title span { color: var(--cyan); text-shadow: 0 0 28px var(--cyan), 0 0 70px rgba(89,217,255,.4); }

.tagline {
  font-size: clamp(13px, 2vw, 18px);
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--gold);
  text-shadow: 0 0 14px rgba(255,209,102,.45);
}

.rules p { margin: 4px 0; color: #aecbe0; font-size: clamp(13px, 1.65vw, 15px); }
.rules strong { color: var(--cyan); }
.rules p:nth-child(5) strong { color: var(--gold); }

.btn {
  margin-top: 6px;
  padding: 15px 44px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--cyan);
  background: transparent;
  border: 2px solid var(--cyan);
  border-radius: 40px;
  cursor: pointer;
  transition: all .18s;
}

.btn:hover {
  background: rgba(89,217,255,.12);
  box-shadow: 0 0 30px rgba(89,217,255,.5), inset 0 0 20px rgba(89,217,255,.15);
  transform: translateY(-2px);
}

.btn.secondary { color: #93b3cc; border-color: rgba(147,179,204,.5); }
.btn.secondary:hover { background: rgba(147,179,204,.09); box-shadow: none; }

.best { font-size: 13px; letter-spacing: 2px; color: var(--gold); }

h2 { font-size: clamp(28px, 5.5vw, 46px); letter-spacing: 7px; color: #f0f8ff; }

.end-title { color: var(--cyan); text-shadow: 0 0 26px var(--cyan); }
.end-title.lost { color: var(--danger); text-shadow: 0 0 26px var(--danger), 0 0 70px rgba(255,84,112,.35); }

.final-wrap { display: flex; flex-direction: column; gap: 7px; align-items: center; }
.final-label { font-size: 11px; letter-spacing: 4px; color: #5f7b95; }

.final-score {
  font-size: clamp(44px, 8.5vw, 78px);
  font-weight: 800;
  color: var(--cyan);
  text-shadow: 0 0 30px var(--cyan);
  font-variant-numeric: tabular-nums;
}

.dim { color: #6f8ba3; }
.btn-row { display: flex; gap: 13px; flex-wrap: wrap; justify-content: center; }