html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;   
}

html {
    overflow-y: scroll;
}
 Estils existents --- */
h1 { margin-top: 50px; }
li { color: #666; } 
ul { margin-left: 25px; }
.section { margin-bottom: 45px; }

.highlight {
    background: #f0f0f1;
    padding: 12px 18px;
    margin: 20px 0;
}

.accordion {
    background: #f0f0f1;
    color: #333;
    cursor: pointer;
    padding: 18px;
    width: 100%;
    border: none;
    text-align: left;
    outline: none;
    font-size: 18px;
    transition: 0.3s;
    margin-top: 10px;
}
.accordion.active, .accordion:hover {
    background: #d9d9da;
}

.panel {
    /* padding: 18px; */
    background: white;
    display: none;
    overflow: hidden;
    margin-bottom: 15px;
}

/* --- VIDEO --- */
.video-container {
    position: relative;
    width: 100%;
    max-width: 900px;
    margin: 20px auto;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    background: #000;
}
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* =============================
        ACORDEONES ANIDADOS
   ============================= */

/* Acordeones principales */
.accordion-main, .accordion-introduccio {
    font-size: 20px;
    font-weight: 600;
    background: #d9d9da;
    margin-top: 50px;
}

.accordion-introduccio{
    margin-top: 35px;
}
/* Panel principal */
.panel-main {
    padding-left: 15px;
}

/* Subacordeones interiores */
.accordion-inner {
    background: #fafafa;
    margin-left: 30px;
    font-size: 16px;
    padding: 14px;
}

.diagram-guia {
    /* width: 100%; */
    max-width: 600px;  
    margin: 20px auto 10px auto;
    text-align: center;
    border: 1px solid #ccc;
    border-radius: 6px;
    overflow: hidden;
}

.diagram-guia img {
    /* width: 100%; */
    height: auto;
    display: block;
}

/* Todos los acordeones y paneles ocupan siempre el 100% del contenedor */
.accordion,
.panel {
    width: 100%;
    box-sizing: border-box;
}

/* Los subacordeones se ven “tabulados” pero sin cambiar el ancho exterior */
.accordion-inner {
    padding-left: 40px;   
    margin-left: 0;      
}

#paginaPrincipal {
    max-width: 1200px;  
    width: 100%;
    margin: 0 auto;
    padding: 0 16px;     
    box-sizing: border-box;
    overflow-x: hidden;
            margin-bottom: 5% !important;
}
    table td:first-child {
        vertical-align: top;
        width: 220px; 
        font-weight: bold; 
    }

     table.tutorial-table {
        width: 100%;
        border-collapse: collapse;
        font-family: Arial, sans-serif;
        font-size: 15px;
        margin-top: 15px;
    }

    /* Encabezado */
    .tutorial-table thead th {
        background-color: #333;
        color: #fff;
        padding: 12px;
        border: 1px solid #fff;
        text-align: left;
    }

    /* Primera columna */
    .tutorial-table td:first-child {
        background-color: #dcdcdc;
        border: 1px solid #fff;
        font-weight: bold;
        width: 220px;
    }

    /* Segunda columna */
    .tutorial-table td:nth-child(2) {
        background-color: #f5f5f5;
        border: 1px solid #fff;
    }

    /* Líneas finas blancas */
    .tutorial-table td {
        padding: 14px;
        vertical-align: top;
    }
    @media (max-width: 600px) {
    .diagram-guia {
        border-width: 1px;
        border-radius: 4px;
        max-width: 100%;
    }
    .diagram-guia img {
    width: 100%;
    height: auto;
    display: block;
}

.tutorial-table td:first-child {
    width: 10%;
}
}