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

body {
    font-family: 'Arial', sans-serif;
    background: #000000;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.challenge-container {
    text-align: center;
    padding: 40px;
}

.challenge-text {
    font-size: 72px;
    color: #ffffff;
    text-shadow: 
        0 0 20px #ff0000,
        0 0 40px #ff0000,
        0 0 60px #ff0000;
    margin-bottom: 60px;
    letter-spacing: 8px;
    font-weight: bold;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        text-shadow: 
            0 0 20px #ff0000,
            0 0 40px #ff0000,
            0 0 60px #ff0000;
    }
    50% {
        text-shadow: 
            0 0 30px #ff0000,
            0 0 60px #ff0000,
            0 0 90px #ff0000;
    }
}

.speak-btn {
    width: 250px;
    height: 70px;
    background: #ff0000;
    border: 4px solid #ffffff;
    color: #ffffff;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    letter-spacing: 4px;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.8);
    transition: all 0.3s ease;
}

.speak-btn:hover {
    background: #cc0000;
    box-shadow: 0 0 40px rgba(255, 0, 0, 1);
    transform: scale(1.05);
}

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

.result {
    margin-top: 40px;
    font-size: 24px;
    min-height: 40px;
    color: #ffffff;
    font-weight: bold;
}

.result.success {
    color: #00ff00;
    text-shadow: 0 0 20px #00ff00;
    animation: success-flash 1s ease-in-out;
}

.result.error {
    color: #ff0000;
    text-shadow: 0 0 20px #ff0000;
    animation: error-shake 0.5s ease-in-out;
}

@keyframes success-flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; transform: scale(1.2); }
}

@keyframes error-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.hidden-thing {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    z-index: -1;
    transition: opacity 2s ease-in-out, z-index 0s 2s, visibility 0s 2s;
}

.hidden-thing.reveal {
    opacity: 1;
    visibility: visible;
    z-index: 1000;
    pointer-events: auto;
    transition: opacity 2s ease-in-out, visibility 0s;
}