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

:root {
  --bg: #1a1a2e;
  --surface: #16213e;
  --card-back: #0f3460;
  --card-front: #e94560;
  --gold: #f5a623;
  --text: #eaeaea;
  --muted: #888;
  --p1: #4fc3f7;
  --p2: #ef9a9a;
  --bot: #a5d6a7;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
}

h1 {
  font-size: 28px;
  text-align: center;
  margin-bottom: 6px;
  background: linear-gradient(135deg, var(--gold), #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle { color: var(--muted); font-size: 13px; text-align: center; margin-bottom: 20px; }

/* SCREENS */
.screen { width: 100%; max-width: 480px; display: none; }
.screen.active { display: block; }

/* MENU */
.menu-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.menu-card h2 { font-size: 16px; color: var(--gold); margin-bottom: 16px; text-align: center; }

.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 10px;
  transition: transform 0.15s, opacity 0.15s;
}
.btn:hover { transform: translateY(-2px); opacity: 0.9; }
.btn:active { transform: scale(0.97); }

.btn-p1 { background: var(--p1); color: #0d1b2a; }
.btn-2p { background: var(--p2); color: #1a0a0a; }
.btn-bot { background: var(--bot); color: #0a1a0a; }
.btn-gold { background: var(--gold); color: #1a0a00; }
.btn-gray { background: #444; color: var(--text); }

.difficulty { display: flex; gap: 8px; margin-bottom: 16px; }
.diff-btn {
  flex: 1; padding: 10px; border: 2px solid #444; background: transparent;
  color: var(--text); border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 600;
  transition: all 0.15s;
}
.diff-btn.selected { border-color: var(--gold); background: rgba(245,166,35,0.15); color: var(--gold); }

label { display: block; margin-bottom: 6px; font-size: 14px; color: var(--muted); }
input[type="text"] {
  width: 100%; padding: 10px 14px; background: #0f3460; border: 1.5px solid #333;
  border-radius: 8px; color: var(--text); font-size: 15px; margin-bottom: 14px;
}

/* GAME SCREEN */
.game-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 14px; background: var(--surface);
  border-radius: var(--radius); padding: 12px 16px;
  box-shadow: var(--shadow);
}

.player-info {
  text-align: center; padding: 6px 10px; border-radius: 8px;
  transition: all 0.3s; flex: 1;
}
.player-info.active-turn { background: rgba(245,166,35,0.2); }
.player-name { font-size: 13px; font-weight: 600; }
.player-score { font-size: 22px; font-weight: 700; }
.player-info.p1 .player-name { color: var(--p1); }
.player-info.p2 .player-name { color: var(--p2); }
.player-info.bot-info .player-name { color: var(--bot); }

.turn-badge {
  font-size: 11px; background: var(--gold); color: #1a0a00;
  padding: 2px 8px; border-radius: 20px; font-weight: 700; margin-top: 2px;
  display: none;
}
.player-info.active-turn .turn-badge { display: inline-block; }

.grid-wrap { width: 100%; max-width: 460px; margin: 0 auto; }
.grid {
  display: grid;
  gap: 8px;
  width: 100%;
}

.card {
  aspect-ratio: 1;
  cursor: pointer;
  perspective: 600px;
  border-radius: 10px;
}

.card-inner {
  width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.4s ease;
  border-radius: 10px;
  position: relative;
}

.card.flipped .card-inner { transform: rotateY(180deg); }
.card.matched .card-inner { transform: rotateY(180deg); }
.card.matched .card-front { background: #1a4a1a !important; border-color: #4caf50; }

.card.fly-away {
  animation: flyUp 0.55s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  pointer-events: none;
  position: relative; z-index: 10;
}
@keyframes flyUp {
  0%   { transform: translateY(0) scale(1); opacity: 1; }
  35%  { transform: translateY(-28px) scale(1.2); opacity: 1; }
  100% { transform: translateY(-130px) scale(0.2); opacity: 0; }
}
.card.gone { visibility: hidden; pointer-events: none; }

.card-back, .card-front {
  position: absolute; width: 100%; height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(20px, 8vw, 36px);
  border: 2px solid #333;
}

.card-back { background: var(--card-back); }
.card-back::after {
  content: '?';
  font-size: clamp(18px, 6vw, 28px);
  color: rgba(255,255,255,0.3);
  font-weight: 700;
}
.card-front { background: #1a2a4a; transform: rotateY(180deg); border-color: #4fc3f7; }

.card:not(.flipped):not(.matched):hover .card-back {
  background: #1a4a7a;
  border-color: var(--gold);
}

/* STATUS BAR */
.status-bar {
  text-align: center; padding: 8px; background: var(--surface);
  border-radius: 8px; margin-top: 10px; font-size: 13px; color: var(--muted);
  min-height: 32px;
}
.status-bar span { color: var(--gold); font-weight: 600; }

/* RESULT SCREEN */
.result-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 30px 24px; text-align: center; box-shadow: var(--shadow);
}
.result-title { font-size: 32px; margin-bottom: 8px; }
.result-winner { font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.result-scores { display: flex; gap: 16px; justify-content: center; margin-bottom: 24px; }
.score-box { background: #0f3460; border-radius: 10px; padding: 14px 20px; min-width: 90px; }
.score-box .name { font-size: 13px; margin-bottom: 4px; }
.score-box .pts { font-size: 28px; font-weight: 700; }

/* BOT THINKING */
.bot-thinking {
  display: none; text-align: center; padding: 10px;
  color: var(--bot); font-size: 14px; font-weight: 600;
}
.dot { animation: blink 1s infinite; }
.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%,80%,100%{opacity:0} 40%{opacity:1} }

/* CONFETTI */
.confetti-piece {
  position: fixed; width: 10px; height: 10px; border-radius: 2px;
  animation: confetti-fall 2s ease-in forwards;
  pointer-events: none; z-index: 999;
}
@keyframes confetti-fall {
  0% { transform: translateY(-20px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}