:root {
  --bg-dark: #0d0f1a;
  --bg-panel: #1a1d33;
  --text: #e0e8ff;
  --muted: #a0a8c8;
  --accent-blue: #6fa8ff;
  --accent-pink: #ff7ac2;
  --accent-green: #6fe3a2;
  --accent-red: #ff6f6f;
  --card-back: #2a2d4a;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  background: radial-gradient(circle at top, #1e2245, var(--bg-dark) 70%);
  color: var(--text);
  font-family: "Lexend", sans-serif;
  height: 100%;
  overflow: hidden;
}

/* --- Header & Layout --- */
.app-header {
  padding: 16px 24px;
  border-bottom: 1px solid #303560;
  text-align: center;
}
.title-wrap {
  display: inline-block;
}
.brand {
  display: flex;
  align-items: flex-end;
  gap: 20px;
}
.limit-badge,
.game-title {
  font-size: 32px;
  font-weight: 900;
  color: var(--accent-blue);
  line-height: 1;
  text-shadow: 0 0 6px #1a1d33;
}
.layout {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: 16px;
  padding: 16px;
  height: calc(100vh - 85px);
}
.game-board {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  grid-template-rows: auto 1fr 1fr 1fr 1fr;
  gap: 12px;
  height: 100%;
}
.right-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* --- UI Panels --- */
.status-box,
.players-scores,
.turn-info {
  background: var(--bg-panel);
  border: 1px solid #303560;
  border-radius: 14px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.status-item {
  text-align: center;
}
.status-item .label {
  font-size: 14px;
  color: var(--muted);
}
.status-item .value {
  display: block;
  font-size: 32px;
  font-weight: 700;
  font-family: "Space Mono";
  margin-top: 4px;
  color: var(--accent-pink);
}

.players-scores {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.player-score {
  display: flex;
  justify-content: space-between;
  padding: 5px;
  border-radius: 5px;
}

.player-score.active {
  background-color: var(--accent-blue);
  color: var(--bg-dark);
}

.turn-info {
  text-align: center;
  font-size: 1.2em;
  color: var(--accent-green);
}

/* --- Game Board --- */
.category-header {
  text-align: center;
  font-weight: 700;
  font-size: 1.1em;
  color: var(--accent-pink);
  padding: 10px;
  background: #262a47;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.question-cell {
  background: var(--card-back);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5em;
  font-weight: 700;
  font-family: "Space Mono";
  color: var(--accent-green);
  cursor: pointer;
  transition: transform 0.3s, background 0.3s;
  perspective: 1000px;
}
.question-cell:not(.flipped):hover {
  transform: scale(1.05);
  background: #3a3d5a;
}
.question-cell.flipped {
  transform: rotateY(180deg);
  background: transparent;
  pointer-events: none;
  color: transparent;
}

/* --- Overlays --- */
.overlay {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: #0d0f1acc;
  backdrop-filter: blur(8px);
  z-index: 100;
}
.overlay.visible {
  display: grid;
}
.card {
  background: var(--bg-panel);
  border-radius: 16px;
  padding: 24px;
  width: min(800px, 90vw);
  text-align: center;
  box-shadow: var(--shadow);
}
.card h2 {
  margin-top: 0;
}
.card label {
  display: block;
  text-align: left;
  margin-bottom: 12px;
}
.card input,
.card select {
  width: 100%;
  padding: 10px;
  margin-top: 4px;
  border-radius: 8px;
  background: var(--bg-dark);
  border: 1px solid #4a4f80;
  color: var(--text);
  font-family: inherit;
}

#player-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 15px;
}

.category-selection {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-bottom: 20px;
}

.category-option {
  padding: 10px;
  background: var(--card-back);
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.3s;
}

.category-option.selected {
  background: var(--accent-blue);
  color: var(--bg-dark);
}

button.primary {
  width: 100%;
  background: linear-gradient(45deg, var(--accent-blue), var(--accent-pink));
  border: none;
  color: #fff;
  padding: 14px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  text-shadow: 0 1px 3px #0005;
  transition: transform 0.2s;
}
button.primary:hover {
  transform: scale(1.02);
}

/* --- Question Display --- */
.question-card {
  width: min(800px, 95vw);
}
#question-text {
  font-size: 1.5em;
  margin-bottom: 30px;
}

.question-timer {
  font-size: 2em;
  color: var(--accent-red);
  margin-bottom: 10px;
}

.answer-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}
.answer-option {
  background: var(--card-back);
  padding: 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.3s;
  font-size: 1.1em;
}
.answer-option:hover {
  background: var(--accent-blue);
  color: var(--bg-dark);
}

.solution-card {
  text-align: left;
}

#solution-title {
  text-align: center;
  color: var(--accent-green);
}

#solution-text {
  font-size: 1.2em;
  line-height: 1.6;
}