.gameover-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 100;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.gameover-overlay.visible {
    opacity: 1;
}

.gameover-content {
    text-align: center;
}

.gameover-title {
    font-size: 4rem;
    font-weight: 200;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: #fff;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.4);
    margin-bottom: 2rem;
}

.gameover-score {
    margin-bottom: 3rem;
}

.gameover-score-label {
    display: block;
    font-size: 1rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0.5rem;
}

.gameover-score-value {
    display: block;
    font-size: 3rem;
    font-weight: 200;
    letter-spacing: 0.1em;
    color: #fff;
}

.gameover-btn {
    display: inline-block;
    font-family: inherit;
    font-size: 1.1rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    color: #fff;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 1rem 2.5rem;
    cursor: pointer;
    transition: border-color 0.3s ease, text-shadow 0.3s ease;
}

.gameover-btn:hover {
    border-color: rgba(255, 255, 255, 0.8);
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
}