/* Simon Game Button Flash Effects */
.flash-white {
    background-color: white !important;
    transition: background 0.2s;
}

.flash-green {
    background-color: #00ff00 !important;
    transition: background 0.2s;
}

body.game-over {
    background-color: #ff4c4c !important;
    transition: background 0.2s;
}body{
    text-align: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #f8ffae 0%, #43c6ac 100%);
    font-family: 'Segoe UI', 'Arial', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}
.btn{
    height: 180px;
    width: 180px;
    border: 8px solid #222;
    border-radius: 20%;
    margin: 1rem;
    box-shadow: 0 6px 24px rgba(0,0,0,0.18), 0 1.5px 4px rgba(0,0,0,0.15);
    font-size: 2rem;
    color: #fff;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover {
    transform: scale(1.07);
    box-shadow: 0 12px 32px rgba(0,0,0,0.22), 0 3px 8px rgba(0,0,0,0.18);
    filter: brightness(1.1);
}
.btn-container{
    display:flex;
    flex-direction: column;
    align-items: center;
    margin-top: 2rem;
}
.line1, .line2 {
    display: flex;
    justify-content: center;
}
h1{
    font-size: 2.5rem;
    color: #222;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    text-shadow: 1px 2px 8px #fff8, 0 1px 0 #fff;
}
h2#high-score {
    font-size: 1.3rem;
    color: #0b3d91;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 0 1px 0 #fff;
}
h3 {
    color: #333;
    margin-bottom: 1.5rem;
    font-weight: 500;
    text-shadow: 0 1px 0 #fff;
}
.red{
    background-color: #ff3b30;
}
.yellow{
    background-color: #ffd600;
}
.purple{
    background-color: #8e24aa;
}
.green{
    background-color: #00c853;
}