:root {
    --primary-color: #4285F4;
    --background-color: #F0F4F8;
    --text-color: #3C4043;
    --light-gray: #E8EAED;
    --border-radius: 16px;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: #fff;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 90%;
    text-align: center;
}

header h1 {
    font-size: 2em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 5px;
}

header p {
    font-size: 1em;
    color: #5F6368;
}

.display-area {
    background-color: var(--light-gray);
    padding: 30px;
    border-radius: var(--border-radius);
    margin-top: 30px;
    margin-bottom: 30px;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#statusText {
    font-size: 1.2em;
    font-weight: 500;
    color: #6C757D;
    margin: 0;
}

#earSymbol {
    font-size: 4em;
    font-weight: 700;
    margin-top: 15px;
    color: var(--primary-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.controls {
    display: flex;
    gap: 20px;
    justify-content: center;
}

button {
    padding: 15px 30px;
    border: none;
    border-radius: var(--border-radius);
    color: #fff;
    font-size: 1em;
    font-weight: 700;
    cursor: pointer;
    background-color: var(--primary-color);
    transition: background-color 0.3s, transform 0.2s;
}

button:hover {
    background-color: #3672d6;
    transform: translateY(-2px);
}

footer {
    margin-top: 30px;
    color: #9AA0A6;
    font-size: 0.8em;
}

@media (max-width: 480px) {
    .container {
        padding: 20px;
    }
    
    .controls {
        flex-direction: column;
        gap: 15px;
    }

    button {
        width: 100%;
    }
}