body {
    font-family: Arial, sans-serif;
    background: #f9f9fb;
    margin: 0;
    padding: 1rem;
    color: #333;
}

h1 {
    text-align: center;
    color: #5e3c82;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 10px;
    margin-top: 20px;
    overflow-x: auto;
}

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

.materia {
    padding: 10px;
    border-radius: 8px;
    color: white;
    font-size: 0.9rem;
    text-align: center;
    cursor: not-allowed;
    opacity: 0.6;
    transition: all 0.3s ease;
}

.materia[data-status="available"] {
    cursor: pointer;
    opacity: 1;
}

.materia[data-status="completed"] {
    background-color: #a2d2ff !important;
    color: #000;
}

[data-area="matematicas"] { background-color: #c9a7e1; }
[data-area="software"] { background-color: #8e6cc2; }
[data-area="informatica"] { background-color: #5e3c82; }
[data-area="ia"] { background-color: #a96dd4; }
[data-area="humanidades"] { background-color: #d5b3e5; }
[data-area="idiomas"] { background-color: #e0d3f2; }
[data-area="optativa"] { background-color: #b39ddb; }

.materia[data-status="completed"] {
    background-color: #a2d2ff !important;
    color: #000;
    text-decoration: line-through;
}

.nivel-header {
    text-align: center;
    font-weight: bold;
    margin-bottom: 5px;
    color: #5e3c82;
    font-size: 1rem;
}