/* Sidebar Knoppen */
.nav-btn {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    width: 100% !important;
    padding: 12px 16px !important;
    margin-bottom: 4px;
    border-radius: 8px;
    border: none;
    background: transparent;
    cursor: pointer !important;
    transition: all 0.2s ease;
    text-align: left !important;
    color: #374151;
    font-size: 15px;
    font-weight: 500;
}

.nav-btn i {
    width: 24px;
    margin-right: 12px;
    font-size: 18px;
    pointer-events: none;
}

.nav-btn:hover {
    background-color: #f9fafb !important;
    color: #ef4444;
}

.nav-btn.active {
    background-color: #ef4444 !important;
    color: white !important;
}

/* Hoofd layout fixes */
main {
    position: relative;
    z-index: 1;
    overflow-x: hidden;
}

aside {
    position: relative;
    z-index: 100;
}

/* Dashboard kaarten */
.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border-bottom: 4px solid #ef4444;
}

.stat-card h3 {
    color: #6b7280;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
}

.stat-card p {
    font-size: 1.875rem;
    font-weight: 900;
}

/* Kanban Bord */
.kanban-col {
    background-color: #f3f4f6;
    padding: 1rem;
    border-radius: 0.75rem;
    min-height: 500px;
}

.task-card {
    background: white;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 0.75rem;
    cursor: grab;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    border-left: 4px solid #ef4444;
}

.task-card:active {
    cursor: grabbing;
}

/* Algemene content secties */
.content-section {
    transition: opacity 0.3s ease;
}

.hidden {
    display: none;
}

.avail-btn {
    background: white;
    color: #374151;
}

.avail-btn.active {
    background: #ef4444 !important; /* FC Twente rood */
    color: white !important;
    border-color: #d34739 !important;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}