* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --navy: #081b31;
  --win: #1f8a4c;
  --lose: #c0392b;
  --draw: #6b7280;
  --size: clamp(84px, 24vw, 150px);
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  text-align: center;
  color: var(--navy);
  min-height: 100dvh;
}

h1 {
  background-color: var(--navy);
  color: #fff;
  padding: 1.2rem 1rem;
  font-size: clamp(1.4rem, 5vw, 2.2rem);
}

main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1rem, 3dvh, 2rem);
  padding: clamp(1rem, 4dvh, 2.5rem) 1rem 2rem;
}

.prompt {
  font-size: 1.2rem;
}

.choices {
  display: flex;
  justify-content: center;
  gap: clamp(0.8rem, 4vw, 3rem);
}

.choice {
  width: calc(var(--size) + 14px);
  height: calc(var(--size) + 14px);
  border: 0;
  border-radius: 50%;
  padding: 7px;
  background: transparent;
  cursor: pointer;
  transition: background-color 0.15s, transform 0.15s;
}

.choice:hover:not(:disabled),
.choice:focus-visible {
  background-color: var(--navy);
  transform: scale(1.06);
}

.choice:active:not(:disabled) {
  transform: scale(0.96);
}

.choice:disabled {
  cursor: wait;
  opacity: 0.6;
}

:focus-visible {
  outline: 3px solid #4f8cff;
  outline-offset: 3px;
}

.choice img,
.pick img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.arena {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.8rem, 5vw, 3rem);
}

.pick {
  width: clamp(72px, 20vw, 120px);
}

.pick img {
  aspect-ratio: 1;
  background: #e5e7eb;
}

.pick img:not([src]) {
  visibility: hidden;
}

.pick span {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.95rem;
}

.vs {
  font-weight: 700;
  font-size: 1.2rem;
}

.score-board {
  display: flex;
  justify-content: center;
  gap: clamp(1.5rem, 8vw, 4rem);
}

.score p:first-child {
  font-size: clamp(2.4rem, 9vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
}

.score p:last-child {
  font-size: 1.1rem;
}

#msg {
  display: inline-block;
  background-color: var(--navy);
  color: #fff;
  font-size: clamp(1.1rem, 4.5vw, 1.8rem);
  padding: 0.9rem 1.4rem;
  border-radius: 1rem;
  transition: background-color 0.2s;
}

#msg.win { background-color: var(--win); }
#msg.lose { background-color: var(--lose); }
#msg.draw { background-color: var(--draw); }

#reset-btn {
  padding: 0.7rem 1.4rem;
  font-size: 1.05rem;
  background: #fff;
  color: var(--navy);
  border: 2px solid var(--navy);
  border-radius: 99px;
  cursor: pointer;
}

#reset-btn:hover {
  background: var(--navy);
  color: #fff;
}

@media (max-height: 640px) and (orientation: landscape) {
  :root { --size: 70px; }
  .arena { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .choice, #msg { transition: none; }
}