.tire-spinner {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  display: inline-grid;
  place-items: center;
  vertical-align: middle;
  border-radius: 50%;
}

.vintage-wheel {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.vintage-wheel-rotor {
  transform-box: view-box;
  transform-origin: 32px 32px;
  animation: vintage-wheel-turn var(--wheel-duration, 1.25s) linear infinite;
}

.tire-spinner[data-density="compact"] .vintage-wheel-detail {
  display: none;
}

.tire-spinner[data-variant="original"] {
  background: repeating-conic-gradient(#f8f1df 0 12deg, #8ea1b8 12deg 21deg);
  animation: vintage-wheel-turn 0.72s linear infinite;
  box-shadow: inset 0 0 0 2px rgb(14 44 81 / 52%);
}

.tire-spinner-rim {
  width: 55%;
  height: 55%;
  display: grid;
  place-items: center;
  border: 2px solid var(--paper-bright, #fffdf1);
  border-radius: 50%;
  background: var(--blue-dark, #123355);
}

.tire-spinner-rim > span {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--paper-bright, #fffdf1);
}

@keyframes vintage-wheel-turn {
  to {
    transform: rotate(1turn);
  }
}

.wheel-study {
  scroll-margin-top: 100px;
  padding-block: 36px;
  border-block: 1px solid var(--line, #d7dacd);
}

.wheel-study h2 {
  margin: 0 0 8px;
}
.wheel-study p {
  color: var(--muted, #68746b);
}
.wheel-study-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  align-items: end;
  margin: 24px 0;
}
.wheel-study-controls label {
  display: grid;
  gap: 10px;
  font-size: 13px;
}
.wheel-study-controls input {
  accent-color: #244b3b;
}
.wheel-study-controls button {
  border: 1px solid var(--line, #b8c2b8);
  border-radius: 4px;
  padding: 10px 16px;
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.wheel-study-comparison {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 16px;
}
.wheel-study-card {
  padding: 24px;
  border: 1px solid #cdd2c5;
  border-radius: 8px;
  background: #faf8ef;
  color: #243f33;
}
.wheel-study-card.is-enamel {
  border-color: #a99c73;
  background: #193e32;
  color: #faf4e4;
}
.wheel-study-card > small {
  font-family: "DM Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.wheel-study-pair {
  display: flex;
  min-height: 150px;
  align-items: center;
  justify-content: space-around;
  gap: 24px;
}
.wheel-study-pair > div {
  display: grid;
  gap: 18px;
  justify-items: center;
}
.wheel-study-pair small {
  font-size: 11px;
  opacity: 0.7;
}
.wheel-study-sizes {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 28px;
  margin-top: 28px;
}
.wheel-study-sizes > span {
  display: grid;
  justify-items: center;
  gap: 12px;
}
.wheel-study-sizes small {
  font-size: 11px;
}
.wheel-study-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 28px;
  padding: 12px 18px;
  border: 1px solid #8c9c83;
  border-radius: 4px;
  background: #234a39;
  color: #fff9e8;
  font-size: 13px;
}

.wheel-study[data-paused="true"] .vintage-wheel-rotor,
.wheel-study[data-paused="true"] .tire-spinner[data-variant="original"] {
  animation-play-state: paused;
}

@media (prefers-reduced-motion: reduce) {
  .vintage-wheel-rotor,
  .tire-spinner[data-variant="original"] {
    animation: none;
  }
}