.head-to-head-shell { gap: 12px; isolation: isolate; overflow: hidden; }
.head-to-head-shell::before,
.head-to-head-shell::after {
  background:
    radial-gradient(circle, rgba(184, 255, 24, .34) 0 1px, transparent 1.35px) 0 0 / 12px 12px,
    radial-gradient(circle at center, rgba(184, 255, 24, .24), rgba(184, 255, 24, .1) 42%, rgba(184, 255, 24, 0) 72%);
  border-radius: 50%;
  content: "";
  height: var(--corner-gradient-size);
  mask-image: radial-gradient(circle, #000 0 45%, rgba(0, 0, 0, .72) 56%, transparent 74%);
  opacity: .65;
  pointer-events: none;
  position: fixed;
  width: var(--corner-gradient-size);
  z-index: -1;
}
.head-to-head-shell::before { right: var(--corner-gradient-offset); top: var(--corner-gradient-offset); }
.head-to-head-shell::after { bottom: var(--corner-gradient-offset); left: var(--corner-gradient-offset); }
.head-to-head-shell [hidden] { display: none !important; }
.head-to-head-round { color: var(--green); font-size: .76rem; line-height: 1; margin: 0; text-align: center; }
.head-to-head-intro,
.head-to-head-start { align-self: center; max-width: 420px; width: 100%; }
.head-to-head-intro { margin: auto 0 0; }
.head-to-head-intro h1 { color: var(--green); font-size: 1.45rem; line-height: 1.1; margin: 8px 0 4px; }
.head-to-head-intro span { display: block; font-size: .9rem; line-height: 1.35; }
.head-to-head-intro span + span { margin-top: 8px; }
.head-to-head-start { margin: 4px 0 auto; padding: 16px; }
.head-to-head-start .season-reel { margin-top: 0; }
.deck-status { color: rgba(255, 255, 255, .82) !important; font-size: .78rem !important; left: 50%; line-height: 1; opacity: 0; pointer-events: none; position: absolute; top: 64px; transform: translate(-50%, 6px); transition: opacity 260ms ease, transform 260ms ease, visibility 260ms ease; visibility: hidden; white-space: nowrap; z-index: 3; }
.deck-status.is-visible { opacity: 1; transform: translate(-50%, 0); visibility: visible; }
.season-reel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius-small); height: 96px; margin: 20px 0 12px; overflow: hidden; position: relative; }
.season-reel-track { left: 0; position: absolute; right: 0; top: 0; transform: translateY(18px); will-change: transform; }
.season-reel-track span { align-items: center; color: var(--green); display: flex; font-size: 1.8rem; height: 44px; justify-content: center; line-height: 1; }
.season-reel.is-spinning .season-reel-track { transition: transform 2.45s cubic-bezier(.08, .74, .12, 1); }
.head-to-head-title { font-size: 1.8rem; font-weight: 400; line-height: 1.1; margin: 24px 0 0; text-align: center; }
.head-to-head-game { display: grid; gap: 12px; }
.head-to-head-prompt { padding: 16px; text-align: center; }
.head-to-head-season { color: var(--ink); display: grid; font-size: .85rem; gap: 8px; justify-items: center; line-height: 1; margin: 0; padding: 12px 16px 28px; }
.head-to-head-season strong { color: var(--green); font-size: clamp(1.8rem, 8vw, 2.5rem); line-height: .9; }
.goal-target { padding: 14px 16px 0; }
.goal-target p { color: var(--muted); font-size: .9rem; line-height: 1.25; margin: 0 auto; }
.head-to-head-choices { padding: 12px; }
.head-to-head-choices .section-label { margin-bottom: 16px; }
.choices { display: grid; gap: 8px; grid-template-columns: 1fr 1fr; }
.round-timer { background: rgba(184, 255, 24, .08); border-radius: 999px; height: 4px; margin: 12px 0 2px; overflow: hidden; }
.round-timer span { background: rgba(184, 255, 24, .48); display: block; height: 100%; transform-origin: left center; width: 100%; }
.round-timer span.is-running { animation: head-to-head-countdown 4.5s linear forwards; }
@keyframes head-to-head-countdown { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.choice { align-content: center; background: var(--panel-soft); border: 1px solid var(--line); border-radius: var(--radius-small); color: var(--ink); display: grid; font-size: 1.08rem; font-weight: 400; gap: 6px; line-height: 1.12; min-height: 250px; padding: 16px 10px; place-items: center; text-align: center; transition: background var(--duration-standard) var(--ease-standard), border-color var(--duration-standard) var(--ease-standard), color var(--duration-standard) var(--ease-standard), transform var(--duration-fast) var(--ease-standard); }
.choice-club { color: var(--muted); font-size: .78rem; }
.choice-goals { color: var(--green); display: none; font-size: .92rem; margin-top: 6px; }
.choice.is-revealed .choice-goals { animation: head-to-head-goal-reveal 420ms var(--ease-standard) both; display: block; }
@keyframes head-to-head-goal-reveal { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.choice:hover, .choice:focus-visible { background: rgba(184, 255, 24, .1); border-color: var(--green); outline: none; }
.choice:active { transform: scale(.98); }
.choice.is-correct { background: rgba(184, 255, 24, .1); border-color: rgba(184, 255, 24, .54); color: var(--ink); }
.choice.is-wrong { background: rgba(255, 23, 79, .1); border-color: var(--red); color: #ff9aae; }
.choice:disabled { cursor: default; }
.head-to-head-actions .guess-status { min-height: 1.2em; }
.head-to-head-actions .guess-status.is-correct { color: var(--green); }
.head-to-head-actions .guess-status.is-wrong { color: #ff9aae; }
.head-to-head-actions { background: transparent; border-top: 0; padding: 12px 0 calc(12px + var(--safe-bottom)); }
.head-to-head-actions .action-bar { background: var(--panel-soft); border: 1px solid var(--line); border-radius: var(--radius-panel); grid-template-columns: 1fr; padding: 12px; }
.head-to-head-complete { align-self: stretch; margin: 0; max-width: none; padding: 0; text-align: center; width: 100%; }
.head-to-head-complete .summary-content { justify-items: center; }
.head-to-head-complete .summary-card { max-width: 420px; width: 100%; }
.complete-copy { color: var(--muted); font-size: .92rem; line-height: 1.45; margin: 0; max-width: 300px; text-align: center; }
.head-to-head-summary-actions { margin: 0 auto; max-width: 420px; width: 100%; }
@media (min-width: 768px) { .head-to-head-game { margin: auto 0; } .choice { min-height: 290px; font-size: 1.22rem; } }
@media (max-width: 767px) {
  .app-shell.head-to-head-shell:not(.is-landing):not(.is-club-modes):not(.is-difficulty):not(.is-how-to-play):not(.is-summary) { padding-left: 16px; padding-right: 16px; }
  .app-shell.head-to-head-shell:not(.is-landing):not(.is-club-modes):not(.is-difficulty):not(.is-how-to-play):not(.is-summary) .app-topbar { margin-left: 0; margin-right: 0; }
  .head-to-head-actions { padding-bottom: calc(24px + var(--safe-bottom)); width: min(calc(100% - 32px), 520px); }
}