body {
    margin: 0;
    padding: 0;
    color: rgba(255, 255, 255, 0.87);
    background-color: #0f0f0f;
}

#app {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.audio-starter-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #141923 0%, #07090e 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.starter-dialog {
    background-color: #1a2230;
    border: 2px solid #00e5ff;
    box-shadow: 0 0 35px rgba(0, 229, 255, 0.25);
    border-radius: 12px;
    padding: 36px 44px;
    text-align: center;
    max-width: 520px;
    font-family: 'Courier New', Courier, monospace;
}

.starter-title {
    margin: 0 0 10px 0;
    font-size: 26px;
    color: #00e5ff;
    letter-spacing: 1px;
}

.starter-subtitle {
    margin: 0 0 24px 0;
    font-size: 15px;
    color: #95a5a6;
}

.starter-info {
    background-color: #0e131b;
    border: 1px solid #2c3e50;
    border-radius: 6px;
    padding: 14px 18px;
    margin-bottom: 28px;
    font-size: 14px;
    line-height: 1.6;
    color: #ecf0f1;
    text-align: left;
}

.btn-start-game {
    background-color: #00e5ff;
    color: #07090e;
    font-family: 'Courier New', Courier, monospace;
    font-size: 18px;
    font-weight: bold;
    border: none;
    border-radius: 6px;
    padding: 16px 32px;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s, box-shadow 0.2s;
    outline: none;
}

.btn-start-game:hover, .btn-start-game:focus {
    background-color: #33eeff;
    box-shadow: 0 0 18px rgba(0, 229, 255, 0.6);
    transform: scale(1.03);
}

.btn-start-game:active {
    transform: scale(0.98);
}