.tabs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.tab input { display: none; }

/* blauwe jaar tab */
.tab label {
    background: linear-gradient(135deg, #1f5fa8, #2b7fd6);
    color: #fff;
    padding: 20px;
    border-radius: 16px;
    font-size: 1.8rem;
    text-align: center;
    cursor: pointer;
    box-shadow: 0 6px 15px rgba(0,0,0,0.2);
    transition: 0.3s;
}

.tab label:hover {
    transform: translateY(-4px);
}

/* verborgen content */
.tab-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

/* open */
.tab input:checked + label + .tab-content {
    max-height: 800px;
    padding: 25px 10px;
}

/* events grid */
.events-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

/* event cards */
.events-grid span {
    background: rgba(255,255,255,0.85);
    padding: 12px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 3px 8px rgba(0,0,0,0.12);
    font-family: Arial, Helvetica, sans-serif;
}