.area-juego-tangram {
    width: 100%;
}

.columnas-tangram {
    display: flex;
    gap: 20px;
    width: 100%;
}

.col-trabajo {
    flex: 2;
}

.col-objetivo {
    flex: 1;
    background: #2c3e50;
    color: white;
    padding: 20px;
    border-radius: 20px;
    text-align: center;
    border: 5px solid #34495e;
}

.cuadro-silueta {
    width: 100%;
    height: 250px;
    background: #34495e;
    border-radius: 15px;
    margin: 15px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    border: 3px dashed rgba(255,255,255,0.2);
}

.mesa-tangram {
    width: 100%;
    height: 500px;
    background: #ecf0f1;
    border: 10px solid #bdc3c7;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.1);
}

.pieza-tangram {
    position: absolute;
    cursor: move;
    filter: drop-shadow(2px 2px 3px rgba(0,0,0,0.3));
    user-select: none;
    transition: transform 0.2s ease-out;
}

/* Diploma Styles */
.overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.diploma-card {
    background: #fdfcf0;
    padding: 50px;
    border: 15px double #d4af37;
    border-radius: 10px;
    text-align: center;
    max-width: 600px;
    box-shadow: 0 0 50px rgba(0,0,0,0.5);
    font-family: 'Fredoka One', cursive;
    color: #333;
}

.diploma-card h1 { color: #d4af37; font-size: 3rem; }
.diploma-card h2 { color: #555; }
.sello { font-size: 6rem; margin: 20px 0; }

@media (max-width: 800px) {
    .columnas-tangram { flex-direction: column; }
    .mesa-tangram { height: 400px; }
}