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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at 30% 20%, #1b2a4a, #0a0f1f 70%);
  color: #e8ecff;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 24px;
}

/* Disable text selection globally so rapid clicking never starts a drag. */
#game, #game * {
  user-select: none;
  -webkit-user-select: none;
}

#game {
  width: 100%;
  max-width: 720px;
}

header {
  text-align: center;
  margin-bottom: 24px;
}

h1 {
  font-size: 2rem;
  letter-spacing: 1px;
  margin-bottom: 8px;
  text-shadow: 0 0 20px rgba(120,160,255,0.5);
}

#stardust {
  font-size: 2.5rem;
  font-weight: 700;
  color: #aef;
}

#rate {
  color: #7d8bc0;
  margin-top: 4px;
}

main {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr 1fr;
}

#clicker {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
}

#mineBtn {
  font-size: 1.6rem;
  font-weight: 700;
  padding: 32px 64px;
  border: none;
  border-radius: 18px;
  background: linear-gradient(145deg, #5b8cff, #7a5bff);
  color: white;
  cursor: pointer;
  box-shadow: 0 10px 30px rgba(90,120,255,0.4);
  transition: transform 0.05s ease;
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none; /* prevents drag-picking the button */
}

#mineBtn:active { transform: scale(0.96); }

#shop, #stats {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 16px;
}

h2 { font-size: 1.1rem; margin-bottom: 12px; color: #bcd; }

.shopItem {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.shopItem .info { flex: 1; }
.shopItem .name { font-weight: 600; }
.shopItem .owned { font-size: 0.8rem; color: #889; }
.shopItem .desc { font-size: 0.75rem; color: #778; }

.shopItem button {
  background: #3a4a7a;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  white-space: nowrap;
}

.shopItem button:disabled {
  background: #2a2f44;
  color: #667;
  cursor: not-allowed;
}

.shopItem button.affordable { background: #3d7a4a; }
.shopItem button.affordable:hover { background: #4a9160; }

#stats p { margin-bottom: 8px; color: #cdd; }
.reset {
  margin-top: 12px;
  background: #5a2a2a;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
}
.reset:hover { background: #7a3a3a; }

/* Buy quantity selector */
#buyQty {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 0.85rem;
  color: #99a;
}
#buyQty button {
  background: #2a2f44;
  color: #cdd;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 7px;
  padding: 5px 10px;
  cursor: pointer;
  font-weight: 600;
}
#buyQty button.active {
  background: #3d7a4a;
  color: #fff;
  border-color: #4a9160;
}

/* Prestige button */
.prestige {
  margin-top: 12px;
  width: 100%;
  background: linear-gradient(145deg, #b06bff, #6b8cff);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  font-weight: 700;
}
/* Tip / support button */
.tip {
  display: block;
  width: 100%;
  margin-top: 12px;
  text-align: center;
  text-decoration: none;
  background: linear-gradient(145deg, #ffb14a, #ff7a4a);
  color: #2a1500;
  font-weight: 700;
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
}
.tip:hover { filter: brightness(1.08); }

/* Cloud sync (Google sign-in) */
.cloudRule {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.10);
  margin: 14px 0 10px;
}
.cloud {
  display: block;
  width: 100%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 8px;
  padding: 10px;
  color: #e8ecff;
  font-weight: 700;
  cursor: pointer;
}
.cloud:hover:not(:disabled) { background: rgba(255,255,255,0.12); }
.cloud:disabled { opacity: 0.5; cursor: not-allowed; }
.cloudStatus {
  margin-top: 6px;
  font-size: 0.8rem;
  color: #93a4c8;
  text-align: center;
  min-height: 1.1em;
}

/* Prestige button */
.prestige:hover { filter: brightness(1.1); }
.prestige:disabled {
  opacity: 0.45;
  filter: grayscale(0.5);
  cursor: not-allowed;
}

/* Locked upgrade */
.shopItem.locked { opacity: 0.5; filter: grayscale(0.6); }

/* Click pop animation */
#mineBtn.pop { animation: pop 0.12s ease; }
@keyframes pop {
  0% { transform: scale(1); }
  45% { transform: scale(1.09); }
  100% { transform: scale(1); }
}

/* Achievements panel */
#achievements {
  grid-column: 1 / -1;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 16px;
}
.achHeader { font-weight: 700; margin-bottom: 10px; font-size: 0.95rem; color: #bcd; }
.ach {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  margin-bottom: 6px;
  font-size: 0.85rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
}
.ach.locked { opacity: 0.5; filter: grayscale(0.7); }
.ach.got { background: rgba(120,200,160,0.12); border-color: rgba(120,200,160,0.3); }
.achName { flex: 1; font-weight: 600; }
.achDesc { flex: 1.4; color: #99a; }
.achReward { color: #ffd27a; font-weight: 700; white-space: nowrap; }

/* Achievement toasts */
#toasts {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 1000;
  pointer-events: none;
}
.toast {
  background: linear-gradient(145deg, #2a3a5a, #3a2a5a);
  color: #fff;
  border: 1px solid rgba(160,200,255,0.4);
  border-radius: 12px;
  padding: 12px 18px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }

/* Falling yellow stardust mote (spawned on each click) */
#clicker { position: relative; }
.floater {
  position: absolute;
  font-weight: 800;
  font-size: 1.5rem;
  color: #ffd54a;
  text-shadow: 0 0 10px rgba(255,200,60,0.9);
  pointer-events: none;        /* never intercepts clicks */
  user-select: none;           /* never selectable -> no I-beam drag */
  -webkit-user-select: none;
  animation: fall 0.9s ease-in forwards;
}
@keyframes fall {
  0%   { transform: translate(-50%, 0) scale(1);   opacity: 1; }
  100% { transform: translate(calc(-50% + var(--drift, 0px)), 120px) scale(0.6); opacity: 0; }
}

/* Sound toggle */
.sound {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 1rem;
  cursor: pointer;
  color: #fff;
}
.sound:hover { background: rgba(255,255,255,0.12); }
header { position: relative; }

/* In-game confirm modal */
.modalOverlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}
.modalOverlay.hidden { display: none; }
.modalBox {
  background: #1b1030;
  border: 1px solid rgba(160,200,255,0.3);
  border-radius: 16px;
  padding: 24px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  text-align: center;
}
.modalMsg { color: #fff; font-size: 1rem; line-height: 1.5; margin-bottom: 20px; }
.modalBtns { display: flex; gap: 12px; justify-content: center; }
.modalBtns button {
  padding: 10px 22px;
  border-radius: 10px;
  border: none;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}
.modalCancel { background: rgba(255,255,255,0.12); color: #fff; }
.modalCancel:hover { background: rgba(255,255,255,0.2); }
.modalOk { background: #ff7ad9; color: #1b1030; }
.modalOk:hover { background: #ff9ae3; }