:root { --modal-z:1000; --confetti-z:900; --manageBtn-z:1100; }

body{
  margin:0;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  font-family:system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  background:linear-gradient(-45deg,#fbc2eb,#a6c1ee,#c6ffdd,#fbd3e9);
  background-size:400% 400%;
  animation:gradientBG 15s ease infinite;
}
@keyframes gradientBG{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}

/* top-left manage button */
#manageBtn{
  position:fixed;
  top:14px; left:14px;
  z-index:var(--manageBtn-z);
  background:#2f80ed; color:#fff; border:0;
  padding:10px 12px; border-radius:8px; cursor:pointer;
  box-shadow:0 6px 18px rgba(47,128,237,.18); font-weight:600;
}

.center { display:flex; flex-direction:column; align-items:center; gap:12px; padding:14px; z-index:10; }

/* wheel canvas */
#wheelCanvas {
  width: min(800px, 92vw);
  height: auto;
  border-radius:50%;
  border:10px solid rgba(0,0,0,0.08);
  box-shadow:0 10px 30px rgba(0,0,0,0.12);
  background:#fff;
  display:block;
}

/* controls */
.controls { display:flex; gap:12px; align-items:center; justify-content:center; flex-wrap:wrap; }
#playerName { padding:10px 12px; border-radius:8px; border:1px solid rgba(0,0,0,.12); font-size:15px; min-width:200px; }
#spinBtn {
  padding:14px 28px; border-radius:10px; border:0;
  background:#ff6b6b; color:#fff; font-weight:800; font-size:18px;
  cursor:pointer;
}
#spinBtn:disabled { opacity:.6; cursor:not-allowed; }

/* modal */
.modal { position:fixed; inset:0; display:flex; align-items:center; justify-content:center;
  background:rgba(0,0,0,.55); visibility:hidden; opacity:0;
  transition:opacity .25s ease, visibility .25s; padding:12px; z-index:var(--modal-z);
}
.modal.active { visibility:visible; opacity:1; }
.modal .content { width:90%; max-width:480px; background:#fff; border-radius:12px; padding:18px; box-shadow:0 18px 50px rgba(0,0,0,.18); transform:scale(.98); transition:transform .2s; text-align:center; }
.modal.active .content { transform:scale(1); }

#winnerText { font-size:22px; margin:6px 0; color:#222; text-align:center; }
#prizeText { font-size:20px; margin:6px 0; color:#e91e63; text-align:center; font-weight:800; }

/* prize manager list */
#prizeList { list-style:none; padding:0; margin-top:10px; }
#prizeList li { display:flex; gap:8px; align-items:center; padding:8px; background:#fafafa; border-radius:8px; margin-bottom:8px; }
#prizeList li input { flex:1; padding:8px; border-radius:6px; border:1px solid #eee; }

/* confetti */
#confettiCanvas { position:fixed; inset:0; pointer-events:none; z-index:var(--confetti-z); }

@media (max-width:480px){
  #playerName { min-width:140px; }
  #spinBtn { font-size:16px; padding:12px 20px; }
}

.modal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal .content {
  background: #fff;
  padding: 24px;
  border-radius: 12px;
  max-width: 500px;
  width: 90%;
  overflow-y: auto;
}

.center {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 20px;
}

#wheelCanvas {
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.controls {
  margin-top: 20px;
}

#spinBtn {
  background: #2f80ed;
  color: #fff;
  padding: 14px 32px;
  border-radius: 8px;
  border: none;
  font-size: 18px;
  cursor: pointer;
}

#spinBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}