:root {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #101014;
  color: #e0e0e0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

main {
  width: 100%;
  max-width: 480px;
  padding: 24px;
}

.screen {
  text-align: center;
}

.hidden {
  display: none;
}

h1,
h2 {
  margin: 0 0 16px;
}

form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

input {
  padding: 14px;
  font-size: 18px;
  border-radius: 8px;
  border: 1px solid #3a3a44;
  background: #1c1c22;
  color: #fff;
}

button {
  padding: 14px;
  font-size: 18px;
  font-weight: bold;
  border-radius: 8px;
  border: none;
  background: #3d8bfd;
  color: #101014;
  cursor: pointer;
}

.error {
  color: #ff6b6b;
  min-height: 1.2em;
}

.question-text {
  font-size: 19px;
  font-weight: bold;
  line-height: 1.4;
  min-height: 2.8em;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  aspect-ratio: 1;
}

.answer-square {
  border: none;
  border-radius: 12px;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.35);
}

.answer-square.dim {
  opacity: 0.35;
}

.answer-square.correct {
  outline: 6px solid #fff;
  outline-offset: -6px;
}

.feedback {
  font-size: 22px;
  font-weight: 800;
  margin-top: 16px;
  padding: 14px;
  border-radius: 10px;
  min-height: 1.4em;
}

.feedback.correct {
  color: #ffffff;
  background: #2e9e4f;
}

.feedback.wrong {
  color: #ffffff;
  background: #c73e1d;
}

.player-list {
  list-style: none;
  padding: 0;
  margin-top: 16px;
  text-align: left;
}

.player-list li {
  padding: 8px 0;
  border-bottom: 1px solid #2a2a32;
}