* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', sans-serif; background: linear-gradient(135deg, #FFE66D 0%, #FF6B6B 50%, #4ECDC4 100%); height: 100%; display: flex; justify-content: center; align-items: center; color: #fff; }
.game-container { width: 95%; max-width: 650px; background: rgba(255, 255, 255, 0.15); backdrop-filter: blur(15px); border-radius: 20px; padding: 20px; box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3); }
.screen { display: none; animation: fadeIn 0.5s; }
.screen.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.game-title { text-align: center; margin-bottom: 15px; }
.title-main { display: block; font-size: 2em; font-weight: bold; text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.3); }
.title-sub { display: block; font-size: 1em; opacity: 0.9; margin-top: 5px; }
.game-description { text-align: center; font-size: 1.1em; margin-bottom: 25px; }
.mode-selection h2 { text-align: center; margin-bottom: 15px; }
.mode-buttons { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.mode-btn { background: rgba(255, 255, 255, 0.2); border: 2px solid rgba(255, 255, 255, 0.4); border-radius: 15px; padding: 18px; color: #fff; font-size: 1.1em; cursor: pointer; transition: all 0.3s; display: flex; flex-direction: column; align-items: center; }
.mode-btn:hover, .mode-btn:active { background: rgba(255, 255, 255, 0.3); transform: scale(1.03); }
.mode-name { font-weight: bold; font-size: 1.2em; }
.high-scores { background: rgba(0, 0, 0, 0.2); padding: 15px; border-radius: 10px; }
.high-scores h3 { text-align: center; margin-bottom: 10px; }
.high-score-list { display: flex; justify-content: space-around; gap: 10px; }
.high-score-item { display: flex; flex-direction: column; align-items: center; padding: 10px; background: rgba(255, 255, 255, 0.1); border-radius: 8px; min-width: 80px; }
.high-score-item span:last-child { font-size: 1.3em; font-weight: bold; }
.game-header { display: flex; justify-content: space-between; margin-bottom: 15px; gap: 10px; }
.stat { flex: 1; background: rgba(0, 0, 0, 0.3); padding: 10px; border-radius: 10px; text-align: center; }
.stat-label { display: block; font-size: 0.8em; margin-bottom: 5px; }
.stat-value { display: block; font-size: 1.4em; font-weight: bold; }
.equation-display { text-align: center; background: rgba(0, 0, 0, 0.3); padding: 20px; border-radius: 15px; margin-bottom: 15px; }
.equation { font-size: 2.5em; font-weight: bold; color: #FFD700; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.1); } }
.game-area { position: relative; width: 100%; height: 400px; background: linear-gradient(to bottom, #87CEEB, #90EE90); border-radius: 15px; overflow: hidden; margin-bottom: 15px; }
.basket { position: absolute; bottom: 10px; left: 50%; transform: translateX(-50%); font-size: 3em; cursor: pointer; user-select: none; transition: left 0.1s linear; }
.falling-fruit { position: absolute; user-select: none; pointer-events: none; display: flex; flex-direction: column; align-items: center; background: rgba(255, 255, 255, 0.9); border-radius: 50%; padding: 5px; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3); }
.fruit-icon { font-size: 2em; }
.fruit-number { font-size: 1.5em; font-weight: bold; color: #333; }
.feedback { text-align: center; font-size: 1.5em; font-weight: bold; height: 40px; opacity: 0; transition: opacity 0.3s; }
.feedback.show { opacity: 1; }
.feedback.correct { color: #4AFF4A; text-shadow: 0 0 15px #4AFF4A; }
.feedback.wrong { color: #FF4A4A; text-shadow: 0 0 15px #FF4A4A; }
.feedback.info { color: #FFD700; text-shadow: 0 0 15px #FFD700; }
.result-title { text-align: center; font-size: 2em; margin-bottom: 20px; }
.result-stats { background: rgba(0, 0, 0, 0.3); padding: 20px; border-radius: 15px; margin-bottom: 20px; }
.result-stat { display: flex; justify-content: space-between; padding: 10px; margin-bottom: 10px; background: rgba(255, 255, 255, 0.1); border-radius: 8px; }
.result-value { font-size: 1.3em; font-weight: bold; }
.result-stat.high-score { background: rgba(255, 215, 0, 0.3); }
.result-rank { text-align: center; margin-top: 15px; padding: 15px; background: rgba(255, 255, 255, 0.2); border-radius: 10px; }
.rank-value { display: block; font-size: 3em; font-weight: bold; }
.retry-btn, .back-btn { width: 100%; padding: 15px; margin-bottom: 10px; font-size: 1.2em; border: none; border-radius: 10px; cursor: pointer; font-weight: bold; }
.retry-btn { background: linear-gradient(135deg, #FFE66D 0%, #FF6B6B 100%); color: #fff; }
.back-btn { background: rgba(255, 255, 255, 0.2); color: #fff; border: 2px solid rgba(255, 255, 255, 0.4); }
@media (max-width: 600px) { .title-main { font-size: 1.6em; } .game-area { height: 350px; } .equation { font-size: 2em; } }
@media (hover: none) { .mode-btn:hover { transform: none; } }