.tool-label {
        display: block;
        font-size: 13px;
        font-weight: 600;
        color: var(--text-light);
        text-transform: uppercase;
        letter-spacing: 0.5px;
        margin-bottom: 12px;
    }
    .tool-input {
        padding: 12px 16px;
        border: 1px solid var(--border-light);
        border-radius: 8px;
        font-size: 14px;
        background: var(--bg-light);
        color: var(--text-dark);
        transition: border-color 0.2s;
        font-family: inherit;
    }
    .tool-input:focus {
        outline: none;
        border-color: var(--primary-light);
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    }
    .item-row {
        display: grid;
        grid-template-columns: 2fr 80px 100px 100px 40px;
        gap: 8px;
        margin-bottom: 10px;
        align-items: center;
    }
    .btn-add {
        padding: 10px 16px;
        border: 1px dashed var(--border-light);
        background: var(--bg-light);
        color: var(--text-medium);
        border-radius: 6px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        gap: 8px;
        justify-content: center;
    }
    .btn-add:hover { border-color: var(--primary); color: var(--primary); background: var(--bg-white); }
    .btn-download {
        padding: 14px 20px;
        border: none;
        background: linear-gradient(135deg, #3b82f6, #8b5cf6);
        color: white;
        border-radius: 8px;
        font-size: 15px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s;
        display: flex;
        align-items: center;
        gap: 10px;
        justify-content: center;
    }
    .btn-download:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4); }
    .btn-remove {
        background: none;
        border: none;
        color: var(--text-light);
        cursor: pointer;
        padding: 4px 8px;
    }
    .btn-remove:hover { color: #dc2626; }
    @media (max-width: 1100px) {
        .invoice-grid { grid-template-columns: 1fr !important; }
    }
    @media (max-width: 640px) {
        .item-row { grid-template-columns: 1fr !important; }
    }