/* 03 ring — the 18 live sports as a calm 3D carousel ring (scroll-rotated, draggable, click/focus to front).
   Restrained styling (owner, 2026-09-25): Material Symbols Rounded icons in dark-glass rounded tiles with hairline
   borders; front item = lime icon + thin lime underline. Default CSS = phone snap-scroller; JS adds .ring-3d ≥768px. */
.ring { position: relative; isolation: isolate; overflow: hidden; background: var(--ink-3); padding: 18px 0 44px; }
.ring-glow { position: absolute; left: 50%; top: 60%; width: min(1000px, 100vw); height: 380px; transform: translate(-50%, -50%); z-index: -1; pointer-events: none;
  background: radial-gradient(50% 50% at 50% 50%, rgba(153,44,255,.12), rgba(153,44,255,.04) 55%, transparent 72%); }

.ring-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 6px; }
.ring-title { display: flex; align-items: center; gap: 14px; margin: 0; }
.ring-count { font: 800 56px/.9 var(--f-display); color: var(--lime); letter-spacing: -.01em; }
.ring-title-txt { display: flex; flex-direction: column; gap: 5px; }
.ring-title-top { font: 800 26px/1 var(--f-display); text-transform: uppercase; letter-spacing: .04em; color: #fff; }
.ring-title-sub { font: 600 11px/1.2 var(--f-ui); letter-spacing: .24em; text-transform: uppercase; color: rgba(226,232,240,.6); }
.ring-hint { margin: 0; font: 600 11px/1 var(--f-ui); letter-spacing: .16em; text-transform: uppercase; color: rgba(226,232,240,.5); display: none; align-items: center; gap: 10px; }
.ring-hint i { color: rgba(226,232,240,.6); }

/* ---------- phone default: snap scroller ---------- */
.ring-stage { position: relative; }
.ring-floor { display: none; }
.ring-track { list-style: none; margin: 0; padding: 16px 16px 12px; display: flex; gap: 4px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
.ring-track::-webkit-scrollbar { display: none; }
.ring-item { flex: 0 0 auto; scroll-snap-align: center; }
.ring-tile { --f: 1; position: relative; display: flex; flex-direction: column; align-items: center; gap: 12px; width: 96px; padding: 4px 0 8px; border: 0; background: none; color: #fff; cursor: pointer; -webkit-tap-highlight-color: transparent; }
.ring-badge { position: relative; display: grid; place-items: center; width: 68px; height: 68px; border-radius: 18px; color: #e6e8f0;
  background: linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.015)), rgba(14,16,30,.72);
  border: 1px solid rgba(255,255,255,.10); box-shadow: 0 10px 24px -14px rgba(0,0,0,.8);
  transition: color .5s var(--ease-out), border-color .5s var(--ease-out); }
.ring .sp-glyph { font-size: 32px; line-height: 1; }
.ring .sp-svg { width: 32px; height: 32px; display: block; }
.ring-label { position: relative; font: 600 11px/1.2 var(--f-ui); letter-spacing: .12em; text-transform: uppercase; color: rgba(226,232,240,.72); white-space: nowrap; padding-bottom: 7px; transition: color .5s; }
.ring-label::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 22px; height: 1px; margin-left: -11px; background: var(--lime); transform: scaleX(0); transition: transform .5s var(--ease-out); }
.ring-tile:hover .ring-badge { border-color: rgba(255,255,255,.22); }
.ring-tile:focus-visible { outline: 2px solid var(--lime); outline-offset: 4px; border-radius: 14px; }

.ring-tile.is-front .ring-badge { color: var(--lime); border-color: rgba(208,250,0,.45); }
.ring-tile.is-front .ring-label { color: #fff; }
.ring-tile.is-front .ring-label::after { transform: scaleX(1); }

/* ---------- 3D ring (tablet/desktop) ---------- */
.ring.ring-3d { padding: 26px 0 24px; }
.ring-3d .ring-hint { display: inline-flex; }
.ring-3d .ring-stage { height: 400px; perspective: 1400px; perspective-origin: 50% 30%; touch-action: pan-y; cursor: grab; user-select: none; -webkit-user-select: none; }
.ring-3d .ring-stage.is-drag { cursor: grabbing; }
.ring-3d .ring-world { position: absolute; inset: 0; transform-style: preserve-3d; }
.ring-3d .ring-track { position: absolute; inset: 0; display: block; overflow: visible; padding: 0; transform-style: preserve-3d; }
.ring-3d .ring-item { position: absolute; left: 50%; top: 40%; width: 130px; margin: -70px 0 0 -65px; will-change: transform, opacity; backface-visibility: hidden; }
.ring-3d .ring-tile { width: 130px; gap: 14px; cursor: inherit; }
.ring-3d .ring-badge { width: 92px; height: 92px; border-radius: 24px; }
.ring-3d .ring .sp-glyph, .ring-3d .sp-glyph { font-size: 44px; }
.ring-3d .sp-svg { width: 44px; height: 44px; }
.ring-3d .ring-label { font-size: 12px; opacity: calc((var(--f) - .62) * 3.2); }
.ring-3d .ring-floor { display: block; position: absolute; left: 50%; top: calc(40% + 92px); width: calc(var(--R, 520px) * 2.3); height: calc(var(--R, 520px) * 2.3);
  margin: calc(var(--R, 520px) * -1.15) 0 0 calc(var(--R, 520px) * -1.15); transform: translateZ(calc(var(--R, 520px) * -1)) rotateX(90deg); pointer-events: none; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(153,44,255,.10) 0, rgba(153,44,255,.04) 62%, transparent 86%); }
.ring-3d .ring-floor::after { content: ""; position: absolute; inset: 6%; border-radius: 50%; border: 1px solid rgba(255,255,255,.12); }

@media (max-width: 767px) {
  .ring { padding-top: 6px; }
  .ring-head { justify-content: center; }
  .ring-count { font-size: 44px; }
  .ring-title-top { font-size: 21px; }
  .ring-title-sub { font-size: 10px; letter-spacing: .2em; }
}