body {
    background: radial-gradient(circle at center, #000020, #000010);
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    text-align: center;
    padding: 1rem;
}

.système-solaire {
    position: relative;
    width: 80%;
    margin: 2rem auto;
    height: 800px;
    border-radius: 50%;
    overflow: hidden;
}

.soleil {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, #ffcc00, #ff9900);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 30px #ffcc00;
}

.orbite {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px dashed rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.orbite[data-planet="mercure"] { width: 150px; height: 150px; }
.orbite[data-planet="vénus"] { width: 230px; height: 230px; }
.orbite[data-planet="terre"] { width: 310px; height: 310px; }
.orbite[data-planet="mars"] { width: 390px; height: 390px; }
.orbite[data-planet="jupiter"] { width: 510px; height: 510px; }
.orbite[data-planet="saturne"] { width: 630px; height: 630px; }
.orbite[data-planet="uranus"] { width: 750px; height: 750px; }
.orbite[data-planet="neptune"] { width: 870px; height: 870px; }

/* Zonas droppables distribuidas */
.zone-droppable {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px dashed rgba(255, 255, 255, 0.5);
    z-index: 1;
    background-color: rgba(255, 255, 255, 0.1); /* Para hacer más visible la zona */
}

.zone-droppable.mercure { top: calc(50% - 75px); left: calc(50% + 40px); }
.zone-droppable.vénus { top: calc(50% + 50px); left: calc(50% - 115px); }
.zone-droppable.terre { top: calc(50% + 105px); left: calc(50% + 70px); }
.zone-droppable.mars { top: calc(50% - 195px); left: calc(50% - 130px); }
.zone-droppable.jupiter { top: calc(50% - 255px); left: calc(50% + 120px); }
.zone-droppable.saturne { top: calc(50% + 265px); left: calc(50% - 150px); }
.zone-droppable.uranus { top: calc(50% - 305px); left: calc(50% + 230px); }
.zone-droppable.neptune { top: calc(50% + 295px); left: calc(50% - 305px); }

.planètes {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.planète {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: grab;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.8), rgba(200, 200, 200, 0.6));
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: #000;
    text-align: center;
    text-transform: capitalize;
}

.planète.mercure { background-color: gray; }
.planète.vénus { background-color: #f5c04d; }
.planète.terre { background-color: #3498db; }
.planète.mars { background-color: #e74c3c; }
.planète.jupiter { background-color: #f39c12; }
.planète.saturne { background-color: #f1c40f; }
.planète.uranus { background-color: #1abc9c; }
.planète.neptune { background-color: #2980b9; }

footer {
    text-align: center;
    padding: 1rem;
}

button {
    background-color: #ff5500;
    color: #fff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}