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

body {
    font-family: 'Georgia', serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #009639 0%, #F7D417 50%, #CC0000 100%);
    color: #333;
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 3px solid #CC0000;
}

h1 {
    color: #CC0000;
    font-size: 2.2em;
    margin-bottom: 10px;
}

.slogan {
    font-size: 1.1em;
    color: #009639;
    font-style: italic;
}

.breadcrumb {
    margin: 15px 0;
    font-size: 0.9em;
    color: #666;
}

.breadcrumb a {
    color: #CC0000;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* ESTILOS PARA O ESTÚDIO DE ACORDES */
.acordes-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin: 30px 0;
}

.cartao-acorde {
    background: linear-gradient(135deg, #009639, #F7D417);
    color: white;
    padding: 20px;
    border-radius: 10px;
    cursor: pointer;
    text-align: center;
    transition: all 0.3s ease;
    border: none;
    font-size: 1.1em;
}

.cartao-acorde:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.cartao-acorde:active {
    transform: translateY(0);
}

.grau {
    font-weight: bold;
    font-size: 1.2em;
    margin-bottom: 8px;
}

.progressao {
    font-size: 1em;
    font-family: 'Courier New', monospace;
}

/* CONTROLE DESLIZANTE */
.controle-velocidade {
    margin: 40px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

.controle-velocidade label {
    display: block;
    margin-bottom: 15px;
    font-weight: bold;
    color: #009639;
    font-size: 1.1em;
}

.slider {
    width: 100%;
    height: 10px;
    margin: 15px 0;
}

.labels-slider {
    display: flex;
    justify-content: space-between;
    margin-top: 5px;
    font-size: 0.9em;
    color: #666;
}

footer {
    text-align: center;
    padding: 20px 0;
    border-top: 2px solid #F7D417;
    color: #666;
    font-style: italic;
}

/* Responsividade */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    .acordes-container {
        grid-template-columns: 1fr;
    }
}