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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 10px;
}

.container {
margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    padding: 10px 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
}

h1 {
    color: #333;
    font-size: 2em;
}

.stop-btn {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4);
}

.stop-btn:hover {
    background: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.6);
}

.stop-btn:active {
    transform: translateY(0);
}

.soundboard {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.group-section {
    background: rgba(255, 255, 255, 0.95);
    padding: 10px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

h2 {
    color: #555;
    margin-bottom: 5px;
    font-size: 1.5em;
    border-bottom: 3px solid #667eea;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 5px;
}

.sound-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 7px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
    text-align: center;
    word-wrap: break-word;
}

.sound-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.sound-btn:active {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.5);
}

@media (max-width: 768px) {
    .button-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .sound-btn {
        padding: 8px 5px;
        font-size: 1em;
    }

    h1 {
        font-size: 1.5em;
    }

    h2 {
        font-size: 1.1em;
    }

    header {
        flex-direction: column;
        gap: 5px;
    }
}