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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.screen {
    text-align: center;
    padding: 2rem;
    max-width: 800px;
    width: 100%;
}

.hidden {
    display: none !important;
}

h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.btn {
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
    padding: 1rem 2rem;
    margin: 0.5rem;
    font-size: 1.2rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.difficulty-selection {
    margin: 2rem 0;
}

.high-score, .controls-info {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: 10px;
    margin: 1rem 0;
}

.game-stats {
    background: rgba(0, 0, 0, 0.2);
    padding: 2rem;
    border-radius: 10px;
    margin: 2rem 0;
}

.game-stats h3 {
    margin: 1rem 0;
    font-size: 1.5rem;
}

#new-record {
    color: #FFD700;
    font-size: 1.5rem;
    font-weight: bold;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}