.upgrade-main {
  display: flex; justify-content: center; align-items: flex-start;
  gap: 52px; margin: 44px auto 0 auto; max-width: 1300px;
}
.upgrade-side {
  min-width: 250px; background: rgba(35,31,70,0.95); border-radius: 18px;
  padding: 18px 12px; box-shadow: 0 8px 24px #6a5af966;
}
.upgrade-center {
  display: flex; flex-direction: column; align-items: center; gap: 18px;
  min-width: 340px;
}
.upgrade-circle-wrap { margin-bottom: 18px; }
.upgrade-circle {
  width: 150px; height: 150px; border-radius: 50%;
  background: linear-gradient(145deg, #17b5ff 10%, #6a5af9 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 2.1em; color: #fff; font-weight: bold;
  box-shadow: 0 6px 32px #6a5af988;
  margin-bottom: 10px;
  position: relative;
}
.upgrade-chance {
  font-size: 1.18em; color: #fff;
}
.btn-upgrade {
  background: linear-gradient(90deg,#17b5ff 10%, #6a5af9 100%);
  color: #fff; border: none; font-size: 1.17rem; font-weight: bold;
  border-radius: 15px; box-shadow: 0 2px 14px #6a5af988;
  padding: 13px 55px; transition: background .13s;
}
.btn-upgrade:disabled { background: #232350; color: #888; cursor: default; }
.upgrade-item {
  background: linear-gradient(110deg, #28276c 40%, #3927a8 100%);
  border: 2px solid #222247; border-radius: 13px;
  color: #fff; text-align: center; width: 88px; padding: 7px 4px 3px 4px;
  margin-bottom: 8px; cursor: pointer; position: relative;
  transition: box-shadow .14s, border .12s, transform .13s;
}
.upgrade-item.selected {
  box-shadow: 0 0 13px #2fffe6, 0 0 22px #6a5af9;
  border-color: #17b5ff; z-index: 1; transform: scale(1.08);
}
.upgrade-item img { max-width: 56px; margin-bottom: 4px; }
.upgrade-item .price { font-size: 0.92em; color: #89d7ff; margin-bottom: 2px; }

@media (max-width: 900px) {
  .upgrade-main { flex-direction: column; gap: 26px; margin: 20px 8px; max-width: 99vw; }
  .upgrade-side, .upgrade-center { min-width: unset; width: 100%; }
}