:root {
    --toolbox-fab-size: 54px;
}

#fabToolbox {
    position: fixed;
    bottom: 30px;
    right: 100px; /* leaves space for QuickTrip FAB */
    z-index: 1050;
    width: var(--toolbox-fab-size);
    height: var(--toolbox-fab-size);
    border-radius: 999px;
    border: none;
    color: #fff;
    background: linear-gradient(135deg, #111827, #334155);
    box-shadow: 0 6px 22px rgba(15, 23, 42, 0.35);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform .15s ease, box-shadow .15s ease;
}

#fabToolbox:hover {
    transform: translateY(-1px) scale(1.05);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.42);
}

#fabToolbox:active { transform: scale(0.98); }

@media (max-width: 768px) {
    #fabToolbox { right: 88px; bottom: 22px; }
}

.toolbox-header {
    background: linear-gradient(135deg, #0f172a, #1d4ed8);
}

.toolbox-tabs .nav-link {
    font-weight: 600;
    font-size: 0.9rem;
}

.toolbox-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 14px;
}

.tb-calc-display input {
    font-size: 1.25rem;
    font-weight: 700;
    text-align: right;
    padding: 12px 10px;
}

.tb-calc-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.tb-calc-grid .btn {
    padding: 10px 0;
    border-radius: 10px;
    font-weight: 700;
}

.tb-todo-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tb-todo-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 10px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    background: #f9fafb;
}

.tb-todo-item.done {
    opacity: 0.75;
    text-decoration: line-through;
}

.tb-todo-text {
    flex: 1;
    font-size: 0.92rem;
    word-break: break-word;
}